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Merge branch 'thread_join' into 'main'

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Merge ~~thread_scheduler~~ thread_join to main

See merge request simpleos/burritos!17
This commit is contained in:
Legot Quentin 2023-05-04 22:41:25 +00:00
commit 5f8965b94d
97 changed files with 5741 additions and 1458 deletions
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5
.gitignore vendored
View File

@ -1,4 +1,7 @@
/target /target
/.idea /.idea
*.iml *.iml
*.txt /*.txt
/.vscode
*.a
*.o

31
.gitlab-ci.yml
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@ -1,27 +1,38 @@
default: default:
image: rust:latest image: rust:1.68-bookworm
before_script:
- wget -q https://cloud.cuwott.fr/s/9fyrejDxMdNRQNn/download/riscv64-cross-compiler-multilib.tar.gz
- mkdir /opt/riscv
- tar xzf riscv64-cross-compiler-multilib.tar.gz -C /opt/riscv
stages: stages:
- build
- test - test
build-job:
stage: build
script:
- echo "Compiling the code..."
- cargo build
- echo "Compile complete."
unit-test-job: unit-test-job:
stage: test stage: test
script: script:
- echo "Compiling c files"
- make
- echo "Running unit tests..." - echo "Running unit tests..."
- cargo test - cargo test
unsafe-test-job:
stage: test
script:
- echo "Checking if List is still safe"
- rustup +nightly component add miri
- export MIRIFLAGS="-Zmiri-disable-isolation"
- cargo +nightly miri test utility::list::test
only:
changes:
- "src/utility/list.rs"
lint-test-job: lint-test-job:
only: only:
refs:
- merge_requests - merge_requests
stage: test stage: test
script: script:
- echo "Linting code..." - echo "Linting code..."
- cargo clippy - rustup component add clippy
- cargo clippy -- -D warnings

380
Cargo.lock generated
View File

@ -2,6 +2,386 @@
# It is not intended for manual editing. # It is not intended for manual editing.
version = 3 version = 3
[[package]]
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"concolor-override",
"concolor-query",
"is-terminal",
"utf8parse",
]
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"once_cell",
]
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"bitflags",
"clap_lex",
"strsim",
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"quote",
"syn",
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"libc",
"windows-sys 0.45.0",
]
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[[package]]
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[[package]]
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"libc",
"linux-raw-sys",
"windows-sys 0.45.0",
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"windows_x86_64_gnu 0.42.2",
"windows_x86_64_gnullvm 0.42.2",
"windows_x86_64_msvc 0.42.2",
]
[[package]]
name = "windows-targets"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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"windows_aarch64_msvc 0.48.0",
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"windows_i686_msvc 0.48.0",
"windows_x86_64_gnu 0.48.0",
"windows_x86_64_gnullvm 0.48.0",
"windows_x86_64_msvc 0.48.0",
]
[[package]]
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[[package]]
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8
Cargo.toml
View File

@ -1,8 +1,14 @@
[package] [package]
name = "burritos" name = "burritos"
rust-version = "1.64"
version = "0.1.0" version = "0.1.0"
edition = "2021" edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html [registries.crates-io]
protocol = "sparse"
[build-dependencies]
cc = "1.0"
[dependencies] [dependencies]
clap = { version = "4.2.1", features = ["derive"] }

31
Makefile Normal file
View File

@ -0,0 +1,31 @@
TOPDIR=.
include $(TOPDIR)/Makefile.config
all: dumps user_lib instruction_tests syscall
#
# Main targets
#
instruction_tests:
$(MAKE) build -C test/riscv_instructions/
dumps:
$(MAKE) dumps -C test/riscv_instructions/
mkdir -p ${TOPDIR}/target/dumps/
find . -path ${TOPDIR}/target -prune -o -name '*.dump' -exec mv {} ${TOPDIR}/target/dumps/ \;
user_lib:
$(MAKE) -C userlib/
syscall: user_lib
$(MAKE) build -C test/syscall_tests/
$(RM) test/syscall_tests/*.o
mkdir -p ${TOPDIR}/target/guac/
find . -name '*.guac' -exec mv {} ${TOPDIR}/target/guac/ \;
clean:
$(MAKE) clean -C userlib/
$(MAKE) clean -C test/
$(RM) -rf $(TOPDIR)/target

0
test_programs/Makefile.config → Makefile.config
View File

18
test_programs/Makefile.tests → Makefile.rules
View File

@ -1,5 +1,11 @@
include $(TOPDIR)/Makefile.config include $(TOPDIR)/Makefile.config
USERLIB = $(TOPDIR)/userlib USERLIB = $(TOPDIR)/userlib
AS = $(RISCV_AS) -c
GCC = $(RISCV_GCC)
LD = $(RISCV_LD)
INCPATH += -I$(TOPDIR) -I$(USERLIB) INCPATH += -I$(TOPDIR) -I$(USERLIB)
LDFLAGS = $(RISCV_LDFLAGS) -T $(USERLIB)/ldscript.lds LDFLAGS = $(RISCV_LDFLAGS) -T $(USERLIB)/ldscript.lds
ASFLAGS = $(RISCV_ASFLAGS) $(INCPATH) ASFLAGS = $(RISCV_ASFLAGS) $(INCPATH)
@ -7,16 +13,19 @@ CFLAGS = $(RISCV_CFLAGS) $(INCPATH)
# Rules # Rules
%.o: %.s %.o: %.s
$(RISCV_AS) $(ASFLAGS) -c $< $(AS) $(ASFLAGS) -c $<
%.o: %.c %.o: %.c
$(RISCV_GCC) $(CFLAGS) -c $< $(GCC) $(CFLAGS) -c $<
%.a: %.o
$(AR) $(ARFLAGS) $@ $<
%.dump: %.o %.dump: %.o
$(RISCV_OBJCOPY) -j .text -O $(DUMP_FORMAT) $< $@ $(RISCV_OBJCOPY) -j .text -O $(DUMP_FORMAT) $< $@
%.guac: %.o %.guac: %.o
$(RISCV_LD) $(LDFLAGS) $+ -o $@ $(LD) $(LDFLAGS) $+ -o $@
# Dependencies # Dependencies
.%.d: %.s .%.d: %.s
@ -31,6 +40,9 @@ CFLAGS = $(RISCV_CFLAGS) $(INCPATH)
| sed '\''s/\($*\)\.o[ :]*/\1.o $@ : /g'\'' > $@; \ | sed '\''s/\($*\)\.o[ :]*/\1.o $@ : /g'\'' > $@; \
[ -s $@ ] || rm -f $@' [ -s $@ ] || rm -f $@'
$(PROGRAMS):
$(LD) $(LDFLAGS) $+ -o $@
# Targets # Targets
#clean: #clean:
# rm -rf *.o 2> /dev/null # rm -rf *.o 2> /dev/null

40
burritos.cfg Executable file
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@ -0,0 +1,40 @@
##################################################
# BurritOS configuration file
##################################################
NumPhysPages = 400
UserStackSize = 4096
MaxFileNameSize = 256
NumDirEntries = 30
NumPortLoc = 32009
NumPortDist = 32010
ProcessorFrequency = 100
SectorSize = 128
PageSize = 128
MaxVirtPages = 200000
# String values
###############
# WARNING: Copying can be very slow
# because the system transferts data
# by 10 byte chunks. The transfer file
# can be set by changing the transfersize
# constant in fstest.rs.
TargetMachineName = localhost
FileToCopy = test/halt /halt
FileToCopy = test/hello /hello
FileToCopy = test/sort /sort
FileToCopy = test/shell /shell
# Boolean values
################
UseACIA = None
PrintStat = 1
FormatDisk = 1
ListDir = 1
PrintFileSyst = 0
ProgramToRun = /sort

390
src/kernel/exception.rs Normal file
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@ -0,0 +1,390 @@
use std::{cell::RefCell, rc::Rc};
use crate::{simulator::{machine::{ExceptionType, Machine}, error::{MachineOk, MachineError}}};
use crate::kernel::synch::{Lock, Semaphore};
use super::{system::{System, self}, thread::Thread};
/// The halt system call. Stops Burritos.
pub const SC_SHUTDOWN: u8 = 0;
/// The exit system call
///
/// Ends the calling thread
pub const SC_EXIT: u8 = 1;
/// The exec system call
///
/// Creates a new process (thread+address space)
pub const SC_EXEC: u8 = 2;
/// The join system call
///
/// Wait for the thread idThread to finish
pub const SC_JOIN: u8 = 3;
/// The create system call
///
/// Create a new file in nachos file system
pub const SC_CREATE: u8 = 4;
/// The open system call
///
/// Opens a file and returns an openfile identifier
pub const SC_OPEN: u8 = 5;
/// The read system call
///
/// Read in a file or the console
pub const SC_READ: u8 = 6;
/// The write system call
///
/// Write in a file or at the console
pub const SC_WRITE: u8 = 7;
/// Seek to a given position in an opened file
pub const SC_SEEK: u8 = 8;
/// The close system call
///
/// Close a file
pub const SC_CLOSE: u8 = 9;
/// The newThread system call
///
/// Create a new thread in the same address space
pub const SC_NEW_THREAD: u8 = 10;
/// The Yield System call
///
/// Relinquish the CPU if any other thread is runnable
pub const SC_YIELD: u8 = 11;
/// the PError system call
///
/// print the last error message
pub const SC_PERROR: u8 = 12;
/// carry out P() on the semaphore
pub const SC_P: u8 = 13;
/// carry out V() on the semaphore
pub const SC_V: u8 = 14;
/// create a semaphore and add it in g_objects_addrs
pub const SC_SEM_CREATE: u8 = 15;
/// destroy the semaphore corresponding to the id
pub const SC_SEM_DESTROY: u8 = 16;
/// create a lock and add it to g_object_addrs
pub const SC_LOCK_CREATE: u8 = 17;
/// destroy the lock corresponding to the id
pub const SC_LOCK_DESTROY: u8 = 18;
/// carry out acquire() on the lock
pub const SC_LOCK_ACQUIRE: u8 = 19;
/// carry out release() on the lock
pub const SC_LOCK_RELEASE: u8 = 20;
/// create a condition variable and add it to g_object_addrs
pub const SC_COND_CREATE: u8 = 21;
/// destroy the condition variable corresponding to the id
pub const SC_COND_DESTROY: u8 = 22;
/// carry out wait() on the condition
pub const SC_COND_WAIT: u8 = 23;
/// carry out signal() on the condition
pub const SC_COND_SIGNAL: u8 = 24;
/// carry out broadcast() on the condition
pub const SC_COND_BROADCAST: u8 = 25;
/// the TtySend system call
///
/// Sends some char by the serial line emulated
pub const SC_TTY_SEND: u8 = 26;
/// the TtyReceive system call
///
/// read some char on the serial line
pub const SC_TTY_RECEIVE: u8 = 27;
/// the Mkdir system call
///
/// make a new directory in the file system
pub const SC_MKDIR: u8 = 28;
/// the Rmdir system call
///
/// remove a directory from the file system
pub const SC_RMDIR: u8 = 29;
/// The Remove system call
///
/// Remove a file from the file system
pub const SC_REMOVE: u8 = 30;
/// The FSList system call
///
/// Lists all the file and directories in the filesystem
pub const SC_FSLIST: u8 = 31;
// The systime system call. Gets the system time
pub const SC_SYS_TIME: u8 = 32;
/// Map a file in memory
pub const SC_MMAP: u8 = 33;
/// Behaviour undefined and currently unused
pub const SC_DEBUG: u8 = 34;
pub const CONSOLE_OUTPUT: u8 = 1;
// todo : returns new types, not just machine errors and machine ok
pub fn call(exception: &ExceptionType, machine: &mut Machine, system: &mut System) -> Result<MachineOk, MachineError> {
match exception {
ExceptionType::NoException => Err("No Exception no yet implemented")?,
ExceptionType::SyscallException => syscall(machine, system),
ExceptionType::PagefaultException => Err("Page Fault Exception not yet implemented")?,
ExceptionType::ReadOnlyException => Err("Read Only Exception not yet implemented")?,
ExceptionType::BusErrorException => Err("Bus Error Exception not yet implemented")?,
ExceptionType::AddressErrorException => Err("AddressErrorException not yet implemented")?,
ExceptionType::OverflowException => Err("OverflowException not yet implemented")?,
ExceptionType::IllegalInstrException => Err("IllegalInstrException not yet implemented")?,
ExceptionType::NumExceptionTypes => Err("NumExceptionTypes not yet implemented")?,
}
}
fn syscall(machine: &mut Machine, system: &mut System) -> Result<MachineOk, MachineError> {
let call_type = machine.read_int_register(17) as u8;
match call_type {
SC_SHUTDOWN => Ok(MachineOk::Shutdown),
SC_EXIT => {
let th = match &system.get_thread_manager().g_current_thread {
Some(th) => th.clone(),
None => Err("Current thread is None")?
};
system.get_thread_manager().thread_finish(machine, th);
Ok(MachineOk::Ok)
},
SC_EXEC => todo!(),
SC_JOIN => sc_join(machine, system),
SC_CREATE => todo!(),
SC_OPEN => todo!(),
SC_READ => todo!(),
SC_WRITE => {
let address = machine.read_int_register(10);
let size = machine.read_int_register(11);
// openfileid or 1 (console)
let f = machine.read_int_register(12);
// load buffer
let mut buffer = "".to_string();
for i in 0..size {
buffer.push((machine.read_memory(1, (address + i) as usize)) as u8 as char);
}
if f as u8 == CONSOLE_OUTPUT {
println!("{}", buffer); // todo replace with console driver in the future
Ok(MachineOk::Ok)
} else {
Err("SC_WRITE to file is not yet implemented")?
}
},
SC_SEEK => todo!(),
SC_CLOSE => todo!(),
SC_NEW_THREAD => sc_new_thread(machine, system),
SC_YIELD => todo!(),
SC_PERROR => todo!(),
SC_P => sc_p(machine, system),
SC_V => sc_v(machine, system),
SC_SEM_CREATE => sc_sem_create(machine, system),
SC_SEM_DESTROY => sc_sem_remove(machine, system),
SC_LOCK_CREATE => sc_lock_create(machine, system),
SC_LOCK_DESTROY => sc_lock_destroy(machine, system),
SC_LOCK_ACQUIRE => sc_lock_acquire(machine, system),
SC_LOCK_RELEASE => todo!(),
SC_COND_CREATE => todo!(),
SC_COND_DESTROY => todo!(),
SC_COND_WAIT => todo!(),
SC_COND_SIGNAL => todo!(),
SC_COND_BROADCAST => todo!(),
SC_TTY_SEND => todo!(),
SC_TTY_RECEIVE => todo!(),
SC_MKDIR => todo!(),
SC_RMDIR => todo!(),
SC_REMOVE => todo!(),
SC_FSLIST => todo!(),
SC_SYS_TIME => todo!(),
SC_MMAP => todo!(),
SC_DEBUG => todo!(),
_ => todo!()
}
}
fn sc_lock_release(machine: &mut Machine, system: &mut System) -> Result<MachineOk, MachineError>{
let id = machine.read_int_register(10) as i32;
system.get_thread_manager().lock_release(id, machine)
}
fn sc_lock_acquire(machine: &mut Machine, system: &mut System) -> Result<MachineOk, MachineError> {
let id = machine.read_int_register(10) as i32;
system.get_thread_manager().lock_acquire(id, machine)
}
fn sc_lock_create(machine: &mut Machine, system: &mut System) -> Result<MachineOk, MachineError> {
let addr_name = machine.read_int_register(10) as usize;
let size = get_length_param(addr_name, machine);
let _name = get_string_param(addr_name, size, machine);
let lock = Lock::new();
let id = system.get_thread_manager().get_obj_addrs().add_lock(lock);
machine.write_int_register(10, id as i64);
Ok(MachineOk::Ok)
}
fn sc_lock_destroy(machine: &mut Machine, system: &mut System) -> Result<MachineOk, MachineError> {
let id = machine.read_int_register(10) as i32;
system.get_thread_manager().get_obj_addrs().remove_lock(id);
Ok(MachineOk::Ok)
}
fn sc_p(machine: &mut Machine, system: &mut System) -> Result<MachineOk, MachineError> {
let id_sema = machine.int_reg.get_reg(10);
system.get_thread_manager().sem_p(id_sema as i32, machine)
}
fn sc_v(machine: &mut Machine, system: &mut System) -> Result<MachineOk, MachineError> {
let id_sema = machine.int_reg.get_reg(10);
system.get_thread_manager().sem_v(id_sema as i32, machine)
}
fn sc_sem_create(machine: &mut Machine, system: &mut System) -> Result<MachineOk, MachineError> {
let addr_name = machine.read_int_register(10) as usize;
let initial_count = machine.read_int_register(11) as i32;
let size = get_length_param(addr_name, machine);
let _name = get_string_param(addr_name, size, machine);
match initial_count < 0 {
true => Err(format!("Initial_count < 0"))?,
false => {
let id = system.get_thread_manager().get_obj_addrs().add_semaphore(Semaphore::new(initial_count));
machine.write_int_register(10, id as i64);
Ok(MachineOk::Ok)
}
}
}
fn sc_sem_remove(machine: &mut Machine, system: &mut System) -> Result<MachineOk, MachineError>{
let id = machine.read_int_register(10) as i32;
system.get_thread_manager().get_obj_addrs().remove_semaphore(id);
Ok(MachineOk::Ok)
}
fn sc_new_thread(machine: &mut Machine, system: &mut System) -> Result<MachineOk, MachineError> {
// Get the address of the string for the name of the thread
let name_addr = machine.read_int_register(10) as usize;
// Get the pointer of the function to be executed in the new thread
let func = machine.read_int_register(11);
// Get function parameters
let args = machine.read_int_register(12);
// get string name
let name_size = get_length_param(name_addr, machine);
let thread_name: String = get_string_param(name_addr, name_size, machine).into_iter().collect();
let n_thread = Thread::new(thread_name.as_str());
let n_thread = Rc::new(RefCell::new(n_thread));
let tid = system.get_thread_manager().get_obj_addrs().add_thread(Rc::clone(&n_thread));
let current_thread = match system.get_thread_manager().get_g_current_thread() {
Some(th) => {
Rc::clone(th)
},
None => {
return Err("Current thread is none")?;
}
};
let current_thread = current_thread.borrow_mut();
if let Some(process) = current_thread.get_process_owner() {
system.get_thread_manager().start_thread(n_thread, Rc::clone(&process), func as u64, current_thread.thread_context.int_registers[2] as u64 + machine.page_size, args);
// TODO changé la valeur de sp quand on supportera les addresses virtuels
machine.write_int_register(10, tid as i64);
Ok(MachineOk::Ok)
} else {
return Err("Process owner of current thread is none")?;
}
}
fn sc_join(machine: &mut Machine, system: &mut System) -> Result<MachineOk, MachineError> {
let tid = machine.read_int_register(10);
let p_thread = system.get_thread_manager().get_obj_addrs().search_thread(tid as i32);
match p_thread {
Some(waiting_for) => {
let rc_waiting_for = Rc::clone(waiting_for);
if let Some(current_thread) = system.get_thread_manager().get_g_current_thread() {
let rc_curr = Rc::clone(current_thread);
system.get_thread_manager().thread_join(machine, rc_curr, rc_waiting_for);
Ok(MachineOk::Ok)
} else {
Err("Current should not be None")?
}
},
None => {
// Thread already terminated (type set to INVALID_TYPE) or call on an object
// that is not a thread
// Exit with no error code since we cannot separate the two cases
Ok(MachineOk::Ok)
}
}
}
fn get_length_param(addr: usize, machine: & Machine) -> usize {
let mut i = 0;
let mut c = 1;
while c != 0 {
c = machine.read_memory(1, addr + i);
i += 1;
}
i + 1
}
fn get_string_param(addr: usize, maxlen: usize, machine: &Machine) -> Vec<char> {
let mut dest = Vec::with_capacity(maxlen);
let mut i: usize = 0;
let mut c = 1;
while c != 0 && i < maxlen {
c = machine.read_memory(1, addr + i) as u8;
dest.push(c as char);
i += 1;
}
dest
}
#[cfg(test)]
mod test {
use crate::kernel::exception::{SC_SHUTDOWN, SC_WRITE};
use crate::kernel::system::System;
use crate::simulator::machine::Machine;
use crate::utility::cfg::get_debug_configuration;
#[test]
fn test_sc_shutdown() {
let mut machine = Machine::new(true, get_debug_configuration());
machine.write_int_register(17, SC_SHUTDOWN as i64); // Set type to shutdown
// let ecall = Instruction::new(0b000000000000_00000_000_00000_1110011);
machine.write_memory(4, 0, 0b000000000000_00000_000_00000_1110011); // ecall
machine.write_memory(4, 4, 0b000000001010_00000_000_00001_0010011); // r1 <- 10
let mut system = System::new(true);
machine.run(&mut system);
// If the machine was stopped with no error, the shutdown worked
assert_ne!(machine.read_int_register(1), 10); // Check if the next instruction was executed
}
// This test print HELLO in the console
#[test]
#[ignore]
fn test_sc_print() {
let mut machine = Machine::new(true, get_debug_configuration());
let _address = machine.read_int_register(10);
// Write string 'HELLO' in memory
machine.write_memory(1, 4000, 72);
machine.write_memory(1, 4001, 69);
machine.write_memory(1, 4002, 76);
machine.write_memory(1, 4003, 76);
machine.write_memory(1, 4004, 79);
machine.write_int_register(10, 4000); // String address
machine.write_int_register(11, 5); // String size
machine.write_int_register(12, 1); // Console output
machine.write_memory(4, 0, 0b000000000000_00000_000_00000_1110011); // ecall
machine.write_int_register(17, SC_WRITE as i64); // Set type to write
machine.write_memory(4, 4, 0b000000000000_00000_000_10001_0010011); // r17 <- SC_SHUTDOWN
machine.write_memory(4, 8, 0b000000000000_00000_000_00000_1110011); // ecall
let mut system = System::new(true);
machine.run(&mut system);
}
}

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#![allow(unused, clippy::missing_docs_in_private_items)]
/// Error enum, use it with Result<YourSucessStruct, **ErrorCode**>
pub enum ErrorCode {
IncError,
OpenfileError,
ExecFileFormatError,
OutOfMemory,
OutOfDisk,
AlreadyInDirectory,
InexistFileError,
InexistDirectoryError,
NospaceInDirectory,
NotAFile,
NotADirectory,
DirectoryNotEmpty,
InvalidCounter,
/* Invalid typeId fields: */
InvalidSemaphoreId,
InvalidLockId,
InvalidConditionId,
InvalidFileId,
InvalidThreadId,
/* Other messages */
WrongFileEndianess,
NoAcia,
NumMsgError /* Must always be last */
}

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pub mod process;
pub mod thread;
pub mod mgerror;
pub mod system;
pub mod synch;
mod thread_manager;
pub mod exception;

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#[derive(PartialEq, Debug)]
pub struct Process {
pub num_thread: usize,
}

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use crate::utility::list::List;
use crate::kernel::thread::Thread;
use crate::simulator::interrupt::InterruptStatus::InterruptOff;
use crate::simulator::machine::Machine;
use std::cell::RefCell;
use std::rc::Rc;
use super::thread_manager::ThreadManager;
/// Structure of a Semaphore used for synchronisation
#[derive(PartialEq)]
pub struct Semaphore {
/// Counter of simultanous Semaphore
pub counter:i32,
/// QUeue of Semaphore waiting to be exucated
pub waiting_queue:List<Rc<RefCell<Thread>>>,
}
impl Semaphore {
/// Initializes a semaphore, so that it can be used for synchronization.
///
/// ### Parameters
/// - *counter* initial value of counter
/// - *thread_manager* Thread manager which managing threads
pub fn new(counter: i32) -> Semaphore{
Semaphore { counter, waiting_queue: List::default() }
}
}
/// Lock used for synchronisation, can be interpreted has a Semaphore with a
/// counter of 1
/// It's used for critical parts
#[derive(PartialEq)]
#[derive(Clone)]
pub struct Lock {
/// Thread owning the lock
pub owner: Option<Rc<RefCell<Thread>>>,
/// The queue of threads waiting for execution
pub waiting_queue:List<Rc<RefCell<Thread>>>,
/// A boolean definig if the lock is free or not
pub free: bool
}
impl Lock {
/// Initialize a Lock, so that it can be used for synchronization.
/// The lock is initialy free
///
/// ### Parameters
/// - **thread_manager** Thread manager which managing threads
pub fn new() -> Lock {
Lock { owner: None, waiting_queue: List::default(), free: true }
}
/// Wait until the lock become free. Checking the
/// state of the lock (free or busy) and modify it must be done
/// atomically, so we need to disable interrupts before checking
/// the value of free.
///
/// Note that thread_manager::thread_seep assumes that interrupts are disabled
/// when it is called.
///
/// ### Parameters
/// - **current_thread** the current thread
/// - **machine** the machine where the threads are executed
pub fn acquire(&mut self, machine: &mut Machine, thread_manager: &mut ThreadManager) {
let old_status = machine.interrupt.set_status(InterruptOff);
if self.free {
self.free = false;
self.owner = Option::Some(match thread_manager.get_g_current_thread() {
Some(th) => {
Rc::clone(&th)
},
None => unreachable!()
});
} else {
match thread_manager.get_g_current_thread() {
Some(x) => {
let x = Rc::clone(&x);
self.waiting_queue.push(Rc::clone(&x));
thread_manager.thread_sleep(machine, Rc::clone(&x));
},
None => unreachable!("Current thread should not be None")
}
}
machine.interrupt.set_status(old_status);
}
/// Wake up a waiter if necessary, or release it if no thread is waiting.
/// We check that the lock is held by the g_current_thread.
/// As with Acquire, this operation must be atomic, so we need to disable
/// interrupts. scheduler::ready_to_run() assumes that threads
/// are disabled when it is called.
///
/// ### Parameters
/// - **machine** the machine where the code is executed
/// - **scheduler** the scheduler which determine which thread to execute
pub fn release(&mut self, machine: &mut Machine, thread_manager: &mut ThreadManager) {
let old_status = machine.interrupt.set_status(InterruptOff);
match thread_manager.get_g_current_thread() {
Some(_) => {
if self.held_by_current_thread(thread_manager) {
match self.waiting_queue.pop() {
Some(thread) => {
self.owner = Some(thread);
match &self.owner {
Some(x) => thread_manager.ready_to_run(Rc::clone(&x)),
None => ()
}
},
None => {
self.free = true;
self.owner = None;
}
}
}
}
None => ()
}
machine.interrupt.set_status(old_status);
}
/// True if the current thread holds this lock.
/// Useful for checking in Release, and in Condition operations below.
pub fn held_by_current_thread(&mut self, thread_manager: &mut ThreadManager) -> bool {
match &self.owner {
Some(x) =>
match thread_manager.get_g_current_thread() {
Some(thread) => Rc::ptr_eq(x, thread),
None => false
}
None => false
}
}
}
/// Structure of a condition used for synchronisation
#[allow(unused)] // -> No enough time to implement it
pub struct Condition{
/// The queue of threads waiting for execution
waiting_queue:List<Rc<RefCell<Thread>>>,
}
impl Condition {
/// Initializes a Condition, so that it can be used for synchronization.
///
/// ### Parameters
/// - *thread_manager* Thread manager which managing threads
#[allow(unused)]
pub fn new() -> Condition {
Condition{ waiting_queue: List::default()}
}
/// Block the calling thread (put it in the wait queue).
/// This operation must be atomic, so we need to disable interrupts.
///
/// ### Parameters
/// - **current_thread** the current thread
/// - **machine** the machine where threads are executed
#[allow(unused)]
pub fn wait(&mut self, machine: &mut Machine, thread_manager: &mut ThreadManager) {
let old_status = machine.interrupt.set_status(InterruptOff);
match thread_manager.get_g_current_thread() {
Some(thread) => {
let rc1 = Rc::clone(thread);
let rc2 = Rc::clone(thread);
self.waiting_queue.push(rc1);
thread_manager.thread_sleep(machine, rc2);
},
None => unreachable!()
}
machine.interrupt.set_status(old_status);
}
/// Wake up the first thread of the wait queue (if any).
/// This operation must be atomic, so we need to disable interrupts.
///
/// ### Parameters
/// - **machine** the machine where the code is executed
/// - **scheduler** the scheduler which determine which thread to execute
#[allow(unused)]
pub fn signal(&mut self, machine: &mut Machine, thread_manager: &mut ThreadManager) {
let old_status = machine.interrupt.set_status(InterruptOff);
match self.waiting_queue.pop() {
Some(thread) => thread_manager.ready_to_run(thread),
None => ()
}
machine.interrupt.set_status(old_status);
}
/// Wake up all threads waiting in the waitqueue of the condition
/// This operation must be atomic, so we need to disable interrupts.
///
/// ### Parameters
/// - **machine** the machine where the code is executed
/// - **scheduler** the scheduler which determine which thread to execute
#[allow(unused)]
pub fn broadcast(&mut self, machine: &mut Machine, thread_manager: &mut ThreadManager) {
let old_status = machine.interrupt.set_status(InterruptOff);
match self.waiting_queue.pop() {
Some(thread) => thread_manager.ready_to_run(thread),
None => ()
}
machine.interrupt.set_status(old_status);
}
}
#[cfg(test)]
mod test {
use std::{rc::Rc, cell::RefCell};
use crate::{kernel::{thread::Thread, synch::Lock, thread_manager::ThreadManager}, simulator::machine::Machine, utility::cfg::get_debug_configuration};
#[test]
fn test_lock_simple() {
let mut machine = Machine::new(true, get_debug_configuration());
let mut tm = ThreadManager::new(true);
let thread = Rc::new(RefCell::new(Thread::new("test_lock")));
tm.ready_to_run(Rc::clone(&thread));
tm.set_g_current_thread(Some(Rc::clone(&thread)));
let mut lock = Lock::new();
assert!(lock.free);
lock.acquire(&mut machine, &mut tm);
assert!(lock.held_by_current_thread(&mut tm));
assert!(!lock.free);
lock.release(&mut machine, &mut tm);
assert!(!lock.held_by_current_thread(&mut tm));
assert!(lock.free);
}
#[test]
fn test_lock_multiple() {
let thread1 = Rc::new(RefCell::new(Thread::new("test_lock1")));
let thread2 = Rc::new(RefCell::new(Thread::new("test_lock2")));
let mut machine = Machine::new(true, get_debug_configuration());
let mut tm = ThreadManager::new(true);
tm.ready_to_run(Rc::clone(&thread1));
tm.ready_to_run(Rc::clone(&thread2));
tm.set_g_current_thread(Some(Rc::clone(&thread1)));
let mut lock = Lock::new();
assert!(lock.free);
lock.acquire(&mut machine, &mut tm);
assert!(lock.held_by_current_thread(&mut tm));
assert!(!lock.free);
tm.set_g_current_thread(Some(Rc::clone(&thread2)));
lock.acquire(&mut machine, &mut tm);
tm.set_g_current_thread(Some(Rc::clone(&thread1)));
assert!(lock.held_by_current_thread(&mut tm));
assert!(lock.waiting_queue.iter().count() == 1);
assert!(!lock.free);
lock.release(&mut machine, &mut tm);
assert!(!lock.held_by_current_thread(&mut tm));
tm.set_g_current_thread(Some(Rc::clone(&thread2)));
assert!(lock.held_by_current_thread(&mut tm));
assert!(!lock.free);
lock.release(&mut machine, &mut tm);
assert!(!lock.held_by_current_thread(&mut tm));
assert!(lock.free);
}
}

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//! # System module
//!
//! Module containing structs and methods pertaining to the state of the operating system
use super::{thread_manager::ThreadManager};
/// # System
///
/// This structure represents the state of the threads running on the operating system.
/// It contains references to the following:
///
/// - The simulated machine
/// - The current running thread
/// - The list of active threads
/// - The thread to be destroyed next
/// - The scheduler which acts upon these threads
pub struct System {
thread_manager: ThreadManager
}
impl System {
pub fn new(debug: bool) -> Self {
Self { thread_manager: ThreadManager::new(debug) }
}
// GETTERS
pub fn get_thread_manager(&mut self) -> &mut ThreadManager {
&mut self.thread_manager
}
}

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use std::{rc::Rc, cell::RefCell};
use super::{process::Process, thread_manager::ThreadRef};
use crate::{simulator::machine::{NUM_INT_REGS, NUM_FP_REGS, STACK_REG}, utility::list::List};
const STACK_FENCEPOST: u32 = 0xdeadbeef;
/// Polymorphic macro to get thread without passing a name by default
#[macro_export]
macro_rules! get_new_thread {
() => { Thread::new(DEFAULT_THREAD_NAME) };
($a:literal) => {
Thread::new(&$a.to_string())
};
}
#[derive(PartialEq, Debug)]
pub struct ThreadContext {
pub int_registers: [i64; NUM_INT_REGS],
pub float_registers: [f32; NUM_FP_REGS],
pub pc: u64,
}
#[derive(PartialEq, Debug)]
pub struct Thread {
name: String,
pub process: Option<Rc<RefCell<Process>>>,
pub thread_context: ThreadContext,
pub join_thread: List<ThreadRef>,
}
impl Thread {
/// Thread constructor
pub fn new(name: &str) -> Self {
Self {
name: String::from(name),
process: None,
// simulation_context: UContextT::new(),
thread_context: ThreadContext {
int_registers: [0; NUM_INT_REGS],
float_registers: [0f32; NUM_FP_REGS],
pc: 0,
},
join_thread: List::default(),
}
}
pub fn init_thread_context(&mut self, initial_pc_reg: u64, initial_sp: u64, arg: i64) {
self.thread_context.pc = initial_pc_reg;
self.thread_context.int_registers[10] = arg;
self.thread_context.int_registers[STACK_REG] = initial_sp as i64;
}
/// Check if a thread has overflowed its stack
///
/// This assertion doesn't catch all stack overflow conditions and your program may still crash because of an overflow.
///
pub fn check_overflow(&self) {
// if self.simulator_context.stackBottom != STACK_FENCEPOST {
// panic!("thread {} has overflowed", self.get_name())
// }
}
pub fn get_name(&self) -> String {
self.name.clone()
}
/// Return reference to an optional Process
/// can be None if Thread hasn't been initialize
pub fn get_process_owner(&self) -> &Option<Rc<RefCell<Process>>> {
&self.process
}
}
#[cfg(test)]
mod test {
use super::{Thread, ThreadContext, NUM_INT_REGS, NUM_FP_REGS};
const DEFAULT_THREAD_NAME: &str = "test_thread";
/// This macro allows for getting a Thread for which we've ensured proper initial state
/// in case a commit further down the line changes the initial state of threads generated
/// from Thread::new
macro_rules! expected_initial_state {
() => { expected_initial_state!(DEFAULT_THREAD_NAME) };
($a:expr) => { {
let mut x = Thread::new($a);
x.name = $a.to_string();
x.process = Option::None;
x.thread_context = ThreadContext {
int_registers: [0; NUM_INT_REGS],
float_registers: [0f32; NUM_FP_REGS],
pc: 0
};
x }
};
}
#[test]
fn test_macro() {
let t = get_new_thread!("hello");
assert_eq!(t.get_name(), "hello");
let t = get_new_thread!(1);
assert_eq!(t.get_name(), "1");
}
#[test]
fn check_init() {
let t = get_new_thread!();
let expected_state = expected_initial_state!();
assert_eq!(t, expected_state)
}
}

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src/kernel/thread_manager.rs Normal file
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//! # Thread manager
//!
//! This module describes the data structure and the methods used for thread scheduling
//! in the BurritOS operating system. A struct named [`ThreadManager`] holds the list of
//! all existing [`Thread`] instances and synchronization objects, such as
//! [`Lock`](crate::kernel::synch::Lock),
//! [`Semaphore`](crate::kernel::synch::Semaphore) and
//! [`Condition`](crate::kernel::synch::Condition).
//!
//! ## Purpose
//!
//! [`ThreadManager`] holds the state of the system processes using the following subcomponents:
//!
//! ### Two lists of threads
//!
//! - **ready_list**: The list of threads ready to be executed
//! - **g_alive**: The list of currently executing threads
//!
//! The difference between the two above lists lies in the state of the threads in question.
//! Ready threads have just been enqueued. They are not being executed yet. The second list is
//! needed because many threads may be executing at a given time. However, only a single thread
//! can be handled by the machine at a time. The system thus needs to keep in memory the alive
//! threads in case the currently running thread finishes or gets rescheduled.
//!
//! ### A list of synchronization objects
//!
//! Locks, Semaphores and Conditions allow resource sharing among running threads. Since resources
//! can only be accessed by a single thread at a time, we need data structures to signal other
//! threads that a resource may be busy or unavailable; say for example that:
//!
//! - Thread **A** wants to write to a file while **B** is currently reading said file.
//! - Thread **A** mutating the state of the file could cause issues for **B**.
//! - Therefore **B** needs to lock the file in question to avoid such issues.
//! - Thread **A** will have to wait for **B** to finish reading the file.
//!
//! These synchronization objects are held in an instance of the ObjAddr structure held by
//! ThreadManager. Their state is mutated depending on the actions of the currently running thread
//! through methods such as [`ThreadManager::sem_p`].
//!
//! ## Usage
//!
//! [`ThreadManager`] is thought as a subcomponent of the [`System`](crate::kernel::system::System) struct.
//! Instanciating [`System`](crate::kernel::system::System) will automatically instanciate a [`ThreadManager`]
//!
//! Manually loading a [`Thread`] into [`ThreadManager`] to execute a program with BurritOS could look like
//! this:
//!
//! ```
//! fn load_thread_manually(args: ...) {
//! let mut system = System::new(args.debug);
//!
//! let thread_exec = Thread::new(args.executable.as_str());
//! let thread_exec = Rc::new(RefCell::new(thread_exec));
//! system.get_thread_manager().get_g_alive().push(Rc::clone(&thread_exec));
//!
//! let owner1 = Process { num_thread: 0 };
//! let owner1 = Rc::new(RefCell::new(owner1));
//! system.get_thread_manager().start_thread(Rc::clone(&thread_exec), owner1, loader.elf_header.entrypoint, ptr, -1);
//!
//! let to_run = system.get_thread_manager().find_next_to_run().unwrap();
//! system.get_thread_manager().switch_to(&mut machine, Rc::clone(&to_run));
//!
//! machine.run(&mut system);
//! }
//! ```
//!
//! ## Imports
//!
//! The [`List`] and [`ObjAddr`] submodules used in this module are defined in the utility
//! module. The source code of [`ObjAddr`] has been decoupled from thread_manager in an effort
//! to keep this module concise.
use std::{
rc::Rc,
cell::{
RefCell,
Ref
}
};
use crate::{
utility::{
list::List,
objaddr::ObjAddr
},
simulator::{
machine::{
NUM_INT_REGS,
NUM_FP_REGS,
Machine
},
interrupt::InterruptStatus,
error::{
MachineOk,
MachineError
}
},
kernel::{
thread::Thread,
process::Process
}
};
/// Using this type alias to simplify struct and method definitions
pub type ThreadRef = Rc<RefCell<Thread>>;
/// # Thread manager
///
/// An instance of this struct is responsible for managing threads on behalf of the system
#[derive(PartialEq)]
pub struct ThreadManager {
/// Current running thread
pub g_current_thread: Option<ThreadRef>,
/// The list of alive threads
pub g_alive: List<ThreadRef>,
/// Thread in ready state waiting to become active
ready_list: List<ThreadRef>,
/// List of objects created by the thread manager (such as Locks and Semaphores)
obj_addrs: ObjAddr,
/// If true, enables debug mode
debug: bool
}
impl ThreadManager {
/// Thread manager constructor
pub fn new(debug: bool) -> Self {
Self {
g_current_thread: Option::None,
g_alive: List::default(),
ready_list: List::default(),
obj_addrs: ObjAddr::init(),
debug
}
}
/// Mark a thread as aready, but not necessarily running yet.
///
/// Put it in the ready list, for later scheduling onto the CPU.
///
/// ## Pamameter
///
/// **thread** is the thread to be put on the read list
pub fn ready_to_run(&mut self, thread: ThreadRef) {
self.ready_list.push(thread);
}
/// Return the next thread to be scheduled onto the CPU.
/// If there are no ready threads, return Option::None
///
/// Thread is removed from the ready list.
///
/// **return** Thread thread to be scheduled
pub fn find_next_to_run(&mut self) -> Option<ThreadRef> {
self.ready_list.pop()
}
/// Dispatch the CPU to next_thread. Save the state of the old thread
/// and load the state of the new thread.
///
/// We assume the state of the previously running thread has already been changed from running to blocked or ready.
///
/// Global variable g_current_thread become next_thread
///
/// ## Parameter
///
/// **next_thread** thread to dispatch to the CPU
pub fn switch_to(&mut self, machine: &mut Machine, next_thread: ThreadRef) {
if let Some(old_thread) = self.get_g_current_thread() {
let old_thread = old_thread.clone();
self.thread_save_processor_state(machine, old_thread.clone());
// old_thread.save_simulator_state();
if old_thread != next_thread {
self.debug(format!("switching from \"{}\" to \"{}\"", old_thread.borrow().get_name(), next_thread.borrow().get_name()));
self.thread_restore_processor_state(machine, Rc::clone(&next_thread));
// next_thread.restore_simulator_state();
debug_assert!(!self.ready_list.contains(&next_thread));
self.set_g_current_thread(Some(next_thread));
}
} else {
self.thread_restore_processor_state(machine, Rc::clone(&next_thread));
// next_thread.restore_simulator_state();
self.set_g_current_thread(Some(next_thread));
}
}
/// Start a thread, attaching it to a process
pub fn start_thread(&mut self, thread: ThreadRef, owner: Rc<RefCell<Process>>, func_pc: u64, sp_loc: u64, argument: i64) {
self.debug(format!("starting thread \"{}\"", thread.borrow().get_name()));
let mut thread_m = thread.borrow_mut();
assert_eq!(thread_m.process, Option::None);
thread_m.process = Option::Some(Rc::clone(&owner));
let ptr = sp_loc; // todo addrspace
thread_m.init_thread_context(func_pc, ptr, argument);
owner.borrow_mut().num_thread += 1;
self.get_g_alive().push(Rc::clone(&thread));
self.ready_to_run(Rc::clone(&thread));
}
/// Wait for another thread to finish its execution
pub fn thread_join(&mut self, machine: &mut Machine, waiter: ThreadRef, waiting_for: ThreadRef) {
let waiting_for = Rc::clone(&waiting_for);
if self.get_g_alive().contains(&waiting_for) {
waiting_for.borrow_mut().join_thread.push(Rc::clone(&waiter));
self.thread_yield(machine, Rc::clone(&waiter), false);
}
}
/// Relinquish the CPU if any other thread is runnable.
///
/// Cannot use yield as a function name -> reserved name in rust
///
/// ## Parameters
///
/// **is_ready** true if **thread** should be readded to ready_to_run list, false otherwise. Typically false when joining per example
pub fn thread_yield(&mut self, machine: &mut Machine, thread: ThreadRef, is_ready: bool) {
let old_status = machine.interrupt.set_status(crate::simulator::interrupt::InterruptStatus::InterruptOff);
self.debug(format!("Yeilding thread: \"{}\"", thread.borrow().get_name()));
debug_assert_eq!(&Option::Some(Rc::clone(&thread)), self.get_g_current_thread());
let next_thread = self.find_next_to_run();
if let Some(next_thread) = next_thread {
if is_ready {
self.ready_to_run(thread);
}
self.switch_to(machine, next_thread);
}
machine.interrupt.set_status(old_status);
}
/// Put the thread to sleep and relinquish the processor
pub fn thread_sleep(&mut self, machine: &mut Machine, thread: ThreadRef) {
debug_assert_eq!(Option::Some(Rc::clone(&thread)), self.g_current_thread);
debug_assert_eq!(machine.interrupt.get_status(), InterruptStatus::InterruptOff);
self.debug(format!("Sleeping thread {}", thread.borrow().get_name()));
let mut next_thread = self.find_next_to_run();
while next_thread.is_none() {
eprintln!("Nobody to run => idle");
machine.interrupt.idle();
next_thread = self.find_next_to_run();
}
self.switch_to(machine, Rc::clone(&next_thread.unwrap()));
}
/// Finish the execution of the thread and prepare its deallocation
pub fn thread_finish(&mut self, machine: &mut Machine, thread: ThreadRef) {
let old_status = machine.interrupt.set_status(InterruptStatus::InterruptOff);
assert!(self.g_alive.remove(Rc::clone(&thread)));
self.debug(format!("Finishing thread {}", thread.borrow().get_name()));
// g_objets_addrs->removeObject(self.thread) // a ajouté plus tard
for (_, el) in thread.borrow().join_thread.iter().enumerate() {
self.ready_to_run(Rc::clone(&el));
}
self.thread_sleep(machine, Rc::clone(&thread));
machine.interrupt.set_status(old_status);
}
/// Save the CPU state of a user program on a context switch.
pub fn thread_save_processor_state(&mut self, machine: &mut Machine, thread: ThreadRef) {
let mut t = thread.borrow_mut();
for i in 0..NUM_INT_REGS {
t.thread_context.int_registers[i] = machine.read_int_register(i);
}
for i in 0..NUM_FP_REGS {
t.thread_context.float_registers[i] = machine.read_fp_register(i);
}
t.thread_context.pc = machine.pc;
}
/// Restore the CPU state of a user program on a context switch.
pub fn thread_restore_processor_state(&self, machine: &mut Machine, thread: ThreadRef) {
let t: Ref<_> = thread.borrow();
for i in 0..NUM_INT_REGS {
machine.write_int_register(i, t.thread_context.int_registers[i]);
}
machine.pc = t.thread_context.pc;
}
/// Decrement the value, and wait if it becomes < 0. Checking the
/// value and decrementing must be done atomically, so we
/// need to disable interrupts before checking the value.
///
/// Note that thread_manager::thread_sleep assumes that interrupts are disabled
/// when it is called.
///
/// ### Parameters
/// - *id_sema* id of the semaphore, stored in [`ObjAddr`], id given by user program thought exceptions
/// - *machine* Current state of the machine
pub fn sem_p(&mut self, id_sema: i32, machine: &mut Machine) -> Result<MachineOk, MachineError> {
let old_status = machine.interrupt.set_status(InterruptStatus::InterruptOff);
let thread = match self.get_g_current_thread() {
Some(thread) => Rc::clone(thread),
None => Err("sem_p error: current thread should not be None")?
};
let sema = match self.get_obj_addrs().search_semaphore(id_sema) {
Some(sema) => sema,
None => Err("sem_p error: cannot find semaphore")?
};
sema.counter -= 1;
if sema.counter < 0 {
sema.waiting_queue.push(thread.clone());
self.thread_sleep(machine, thread);
}
machine.interrupt.set_status(old_status);
Ok(MachineOk::Ok)
}
/// Increment semaphore value, waking up a waiting thread if any.
/// As with P(), this operation must be atomic, so we need to disable
/// interrupts.
///
/// scheduler::ready_to_run() assumes that interrupts
/// are disabled when it is called.
///
/// ### Parameters
/// - *id_sema* id of the semaphore, stored in [`ObjAddr`], id given by user program thought exceptions
/// - **machine** the machine where the threads are executed
pub fn sem_v(&mut self, id_sema: i32, machine: &mut Machine) -> Result<MachineOk, MachineError> {
let sema = match self.get_obj_addrs().search_semaphore(id_sema) {
Some(sema) => sema,
None => Err("sem_v error: cannot find semaphore")?
};
let old_status = machine.interrupt.set_status(InterruptStatus::InterruptOff);
sema.counter += 1;
if let Some(thread) = sema.waiting_queue.pop() {
self.ready_to_run(thread)
}
machine.interrupt.set_status(old_status);
Ok(MachineOk::Ok)
}
/// Wait until the lock become free. Checking the
/// state of the lock (free or busy) and modify it must be done
/// atomically, so we need to disable interrupts before checking
/// the value of free.
///
/// Note that thread_manager::thread_seep assumes that interrupts are disabled
/// when it is called.
///
/// ### Parameters
/// - **id** id of the lock, stored in [`ObjAddr`], id given by user program thought exceptions
/// - **machine** the machine where the threads are executed
pub fn lock_acquire(&mut self, id: i32, machine: &mut Machine) -> Result<MachineOk, MachineError> {
let current_thread = match self.get_g_current_thread() {
Some(thread) => Rc::clone(thread),
None => Err("lock_acquire error: current_thread should not be None.")?
};
let old_status = machine.interrupt.set_status(InterruptStatus::InterruptOff);
if let Some(lock) = self.get_obj_addrs().search_lock(id) {
if lock.free {
lock.free = false;
lock.owner = Some(current_thread)
} else {
lock.waiting_queue.push(current_thread.clone());
self.thread_sleep(machine, current_thread);
}
} else {
Err("lock_acquire error: cannot find Lock.")?
}
machine.interrupt.set_status(old_status);
Ok(MachineOk::Ok)
}
/// Wake up a waiter if necessary, or release it if no thread is waiting.
pub fn lock_release(&mut self, id: i32, machine: &mut Machine) -> Result<MachineOk, MachineError> {
let old_status = machine.interrupt.set_status(InterruptStatus::InterruptOff);
let current_thread = match self.get_g_current_thread() {
Some(thread) => Rc::clone(thread),
None => Err(String::from("lock_release error: current_thread should not be None."))?
};
let mut lock = match self.get_obj_addrs().search_lock(id) {
Some(lock) => lock,
None => Err(String::from("lock_release error: cannot find lock."))?
};
if let Some(lock_owner) = &lock.owner {
if current_thread.eq(lock_owner) { // is_held_by_current_thread
match lock.waiting_queue.pop() {
Some(th) => {
lock.owner = Some(Rc::clone(&th));
self.ready_to_run(Rc::clone(&th));
},
None => {
lock.free = true;
lock.owner = None;
}
}
}
};
// self.get_obj_addrs().update_lock(id, lock);
machine.interrupt.set_status(old_status);
Ok(MachineOk::Ok)
}
/// Currently running thread
pub fn get_g_current_thread(&mut self) -> &Option<ThreadRef> {
&self.g_current_thread
}
/// List of alive threads
pub fn get_g_alive(&mut self) -> &mut List<ThreadRef> {
&mut self.g_alive
}
/// Set currently running thread
pub fn set_g_current_thread(&mut self, thread: Option<ThreadRef>) {
self.g_current_thread = thread
}
/// Returns a mutable reference to the ObjAddr field of this thread_manager
pub fn get_obj_addrs(&mut self) -> &mut ObjAddr {
&mut self.obj_addrs
}
/// Prints debug messages if self.debug is set to true.
fn debug(&self, message: String) {
if self.debug {
println!("{}", message);
}
}
}
#[cfg(test)]
mod test {
use std::{rc::Rc, cell::RefCell};
use crate::{simulator::{machine::Machine, loader}, kernel::{system::System, thread::Thread, process::Process, thread_manager::ThreadManager, synch::Semaphore}, utility::cfg::get_debug_configuration};
use crate::kernel::synch::Lock;
#[test]
fn test_thread_context() {
let mut machine = Machine::new(true, get_debug_configuration());
let (loader, ptr) = loader::Loader::new("./target/guac/halt.guac", &mut machine, 0).expect("IO Error");
let start_pc = loader.elf_header.entrypoint;
let system = &mut System::new(true);
let thread1 = Thread::new("th1");
let thread1 = Rc::new(RefCell::new(thread1));
system.get_thread_manager().get_g_alive().push(Rc::clone(&thread1));
let owner1 = Process { num_thread: 0 };
let owner1 = Rc::new(RefCell::new(owner1));
system.get_thread_manager().start_thread(Rc::clone(&thread1), owner1, loader.elf_header.entrypoint, ptr + machine.page_size, -1);
debug_assert_eq!(thread1.borrow_mut().thread_context.pc, start_pc);
debug_assert!(system.get_thread_manager().get_g_alive().contains(&Rc::clone(&thread1)));
let to_run = system.get_thread_manager().find_next_to_run().unwrap();
debug_assert_eq!(to_run, Rc::clone(&thread1));
system.get_thread_manager().switch_to(&mut machine, Rc::clone(&to_run));
debug_assert_eq!(system.get_thread_manager().g_current_thread, Option::Some(Rc::clone(&thread1)));
debug_assert_eq!(machine.pc, loader.elf_header.entrypoint);
machine.run(system);
}
#[test]
fn test_lock_single(){
let mut machine = Machine::new(true, get_debug_configuration());
let mut thread_manager = ThreadManager::new(true);
let lock = Lock::new();
let lock_id = thread_manager.get_obj_addrs().add_lock(lock);
let thread = Rc::new(RefCell::new(Thread::new("test_lock")));
let thread_test = thread.clone();
thread_manager.ready_to_run(Rc::clone(&thread));
thread_manager.set_g_current_thread(Some(thread));
thread_manager.lock_acquire(lock_id, &mut machine).expect("lock acquire return an error: ");
{
let lock = thread_manager.get_obj_addrs().search_lock(lock_id).unwrap();
assert_eq!(lock.owner,Some(thread_test));
assert!(!lock.free);
assert!(lock.waiting_queue.is_empty());
}
thread_manager.lock_release(lock_id, &mut machine).expect("lock release return an error: ");
{
let lock = thread_manager.get_obj_addrs().search_lock(lock_id).unwrap();
assert_eq!(lock.owner, None);
assert!(lock.free);
assert!(lock.waiting_queue.is_empty());
}
}
#[test]
fn test_lock_multiple() {
let mut machine = Machine::new(true, get_debug_configuration());
let mut thread_manager = ThreadManager::new(true);
let lock = Lock::new();
let lock_id = thread_manager.get_obj_addrs().add_lock(lock);
let thread_1 = Rc::new(RefCell::new(Thread::new("test_lock_1")));
let thread_2 = Rc::new(RefCell::new(Thread::new("test_lock_2")));
thread_manager.ready_to_run(thread_1.clone());
thread_manager.ready_to_run(thread_2.clone());
thread_manager.set_g_current_thread(Some(thread_1.clone()));
thread_manager.lock_acquire(lock_id, &mut machine).expect("lock acquire return an error at first iteration: ");
{
let lock = thread_manager.get_obj_addrs().search_lock(lock_id).unwrap();
assert_eq!(lock.owner,Some(thread_1.clone()));
assert!(!lock.free);
assert!(lock.waiting_queue.is_empty());
}
thread_manager.set_g_current_thread(Some(thread_2.clone()));
thread_manager.lock_acquire(lock_id, &mut machine).expect("lock acquire return an error at second iteration: ");
{
let lock = thread_manager.get_obj_addrs().search_lock(lock_id).unwrap();
assert_eq!(lock.owner,Some(thread_1.clone()));
assert!(!lock.free);
assert_eq!(lock.waiting_queue.iter().count(),1);
}
thread_manager.lock_release(lock_id, &mut machine).expect("lock release return an error at first iteration: ");
{
let lock = thread_manager.get_obj_addrs().search_lock(lock_id).unwrap();
assert_eq!(lock.owner, Some(thread_2.clone()));
assert!(!lock.free);
assert!(lock.waiting_queue.is_empty());
}
thread_manager.set_g_current_thread(Some(thread_2.clone()));
thread_manager.lock_release(lock_id, &mut machine).expect("lock release return an error at second iteration: ");
{
let lock = thread_manager.get_obj_addrs().search_lock(lock_id).unwrap();
assert!(lock.waiting_queue.is_empty());
assert_eq!(lock.owner, None);
assert!(lock.free);
}
}
#[test]
fn test_semaphore_single() {
// Init
let mut machine = Machine::new(true, get_debug_configuration());
let mut thread_manager = ThreadManager::new(true);
let semaphore = Semaphore::new(1);
let sema_id = thread_manager.get_obj_addrs().add_semaphore(semaphore);
let thread = Rc::new(RefCell::new(Thread::new("test_semaphore")));
thread_manager.ready_to_run(Rc::clone(&thread));
thread_manager.set_g_current_thread(Some(thread));
// P
thread_manager.sem_p(sema_id, &mut machine).expect("semaphore P return an error: ");
{
let semaphore = thread_manager.get_obj_addrs().search_semaphore(sema_id).unwrap();
assert_eq!(semaphore.counter, 0);
assert!(semaphore.waiting_queue.is_empty());
}
// V
thread_manager.sem_v(sema_id, &mut machine).expect("semaphore V return an error: ");
{
let semaphore = thread_manager.get_obj_addrs().search_semaphore(sema_id).unwrap();
assert_eq!(semaphore.counter, 1);
assert!(semaphore.waiting_queue.is_empty());
}
}
#[test]
fn test_semaphore_multiple() {
// Init
let mut tm = ThreadManager::new(true);
let mut machine = Machine::new(true, get_debug_configuration());
let semaphore = Semaphore::new(2);
let sema_id = tm.get_obj_addrs().add_semaphore(semaphore);
let thread1 = Rc::new(RefCell::new(Thread::new("test_semaphore_1")));
let thread2 = Rc::new(RefCell::new(Thread::new("test_semaphore_2")));
let thread3 = Rc::new(RefCell::new(Thread::new("test_semaphore_3")));
// let mut borrow_tm = tm.borrow_mut();
// let scheduler = &mut tm.g_scheduler;
tm.ready_to_run(Rc::clone(&thread1));
tm.ready_to_run(Rc::clone(&thread2));
tm.ready_to_run(Rc::clone(&thread3));
// P
tm.set_g_current_thread(Some(Rc::clone(&thread1)));
tm.sem_p(sema_id, &mut machine).expect("semaphore P return an error: ");
{
let semaphore = tm.get_obj_addrs().search_semaphore(sema_id).unwrap();
assert_eq!(semaphore.counter, 1);
assert!(semaphore.waiting_queue.is_empty());
}
tm.set_g_current_thread(Some(Rc::clone(&thread2)));
tm.sem_p(sema_id, &mut machine).expect("semaphore P return an error: ");
{
let semaphore = tm.get_obj_addrs().search_semaphore(sema_id).unwrap();
assert_eq!(semaphore.counter, 0);
assert!(semaphore.waiting_queue.is_empty());
}
tm.set_g_current_thread(Some(Rc::clone(&thread3)));
tm.sem_p( sema_id, &mut machine).expect("semaphore P return an error: ");
{
let semaphore = tm.get_obj_addrs().search_semaphore(sema_id).unwrap();
assert_eq!(semaphore.counter, -1);
assert!(semaphore.waiting_queue.iter().count() == 1);
}
// V
tm.sem_v(sema_id, &mut machine).expect("semaphore V return an error: ");
{
let semaphore = tm.get_obj_addrs().search_semaphore(sema_id).unwrap();
assert_eq!(semaphore.counter, 0);
assert!(semaphore.waiting_queue.is_empty());
}
tm.sem_v(sema_id, &mut machine).expect("semaphore V return an error: ");
{
let semaphore = tm.get_obj_addrs().search_semaphore(sema_id).unwrap();
assert_eq!(semaphore.counter, 1);
assert!(semaphore.waiting_queue.is_empty());
}
tm.sem_v(sema_id, &mut machine).expect("semaphore V return an error: ");
{
let semaphore = tm.get_obj_addrs().search_semaphore(sema_id).unwrap();
assert_eq!(semaphore.counter, 2);
assert!(semaphore.waiting_queue.is_empty());
}
}
}

70
src/main.rs
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@ -1,14 +1,64 @@
mod simulator;
use simulator::machine::Machine; #![warn(missing_docs)]
use simulator::mem_cmp; #![warn(clippy::missing_docs_in_private_items)]
//! Crate burritos ((BurritOS Using Rust Really Improves The Operating System)
//!
//! Burritos is an educational operating system written in Rust
//! running on RISC-V emulator.
/// Contain hardware simulated part of the machine
mod simulator;
mod kernel;
/// module containing useful tools which can be use in most part of the OS to ease the development of the OS
pub mod utility;
use std::{rc::Rc, cell::RefCell};
use kernel::{system::System, thread::Thread, process::Process};
use simulator::{machine::Machine, loader};
use clap::Parser;
use utility::cfg::read_settings;
#[derive(Parser, Debug)]
#[command(name = "BurritOS", author, version, about = "Burritos (BurritOS Using Rust Really Improves The Operating System)
Burritos is an educational operating system written in Rust
running on RISC-V emulator.", long_about = None)]
/// Launch argument parser
struct Args {
/// Enable debug mode.
/// 0 to disable debug,
/// 1 to enable machine debug,
/// 2 to enable system debug,
/// 3 to enable all debug
#[arg(short, long, value_parser = clap::value_parser!(u8).range(0..=3), default_value_t = 0)]
debug: u8,
/// Path to the executable binary file to execute
#[arg(short = 'x', long, value_name = "PATH")]
executable: String
}
fn main() { fn main() {
let mut m = Machine::_init_machine(); let args = Args::parse();
let path = "memoryComp.txt".to_string();
let checker = mem_cmp::MemChecker::from(&path); let mut machine = Machine::new(args.debug & 1 != 0, read_settings().unwrap());
mem_cmp::MemChecker::fill_memory_from_mem_checker(&checker, &mut m); let (loader, ptr) = loader::Loader::new(args.executable.as_str(), &mut machine, 0).expect("An error occured while parsing the program");
//mem_cmp::Mem_Checker::print_Mem_Checker(&checker);
//Machine::print_memory(&mut m, 0x400000, 0x405000); let mut system = System::new(args.debug & 2 != 0);
Machine::run(&mut m);
let thread_exec = Thread::new(args.executable.as_str());
let thread_exec = Rc::new(RefCell::new(thread_exec));
system.get_thread_manager().get_g_alive().push(Rc::clone(&thread_exec));
let owner1 = Process { num_thread: 0 };
let owner1 = Rc::new(RefCell::new(owner1));
system.get_thread_manager().start_thread(Rc::clone(&thread_exec), owner1, loader.elf_header.entrypoint, ptr + machine.page_size, -1);
let to_run = system.get_thread_manager().find_next_to_run().unwrap();
system.get_thread_manager().switch_to(&mut machine, Rc::clone(&to_run));
machine.run(&mut system);
} }

95
src/simulator/decode.rs
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@ -1,95 +0,0 @@
use core::num::Wrapping; // Permet d'autoriser les overflow pour les opérations voulues
#[allow(non_snake_case)] // supprimer le warning snake case (quand les noms de variables ont des majuscules)
#[derive(Debug)]
pub struct Instruction {
pub value : u64,
pub opcode : u8,
pub rs1 : u8,
pub rs2 : u8,
pub rs3 : u8,
pub rd : u8,
pub funct7 : u8,
pub funct7_smaller : u8,
pub funct3 : u8,
pub shamt : u8, // shamt = imm[5:0] or imm[4:0] (depend of opcode)
pub imm12_I : u16,
pub imm12_S : u16,
pub imm12_I_signed : i16,
pub imm12_S_signed : i16,
pub imm13 : i16,
pub imm13_signed : i16,
pub imm31_12 : u32,
pub imm21_1 : u32,
pub imm31_12_signed : i32,
pub imm21_1_signed : i32,
}
#[allow(non_snake_case)]
pub fn decode(val : u64) -> Instruction {
let value = val;
let opcode = (val & 0x7f) as u8;
let rs1 = ((val >> 15) & 0x1f) as u8;
let rs2 = ((val >> 20) & 0x1f) as u8;
let rs3 = ((val >> 27) & 0x1f) as u8;
let rd = ((val >> 7) & 0x1f) as u8;
let funct7 = ((val >> 25) & 0x7f) as u8;
let funct7_smaller = funct7 & 0x3e;
let funct3 = ((val >> 12) & 0x7) as u8;
let imm12_I = ((val >> 20) & 0xfff) as u16;
let imm12_S = (((val >> 20) & 0xfe0) + ((val >> 7) & 0x1f)) as u16;
let imm12_I_signed = if imm12_I >= 2048 { (Wrapping(imm12_I) - Wrapping(4096)).0 } else { imm12_I } as i16;
let imm12_S_signed = if imm12_S >= 2048 { (Wrapping(imm12_S) - Wrapping(4096)).0 } else { imm12_S } as i16;
let imm13 = (((val >> 19) & 0x1000) + ((val >> 20) & 0x7e0) +
((val >> 7) & 0x1e) + ((val << 4) & 0x800)) as i16;
let imm13_signed = if imm13 >= 4096 { imm13 - 8192 } else { imm13 };
let imm31_12 = (val & 0xfffff000) as u32;
let imm31_12_signed = imm31_12 as i32;
let imm21_1 = ((val & 0xff000) + ((val >> 9) & 0x800) +
((val >> 20) & 0x7fe) + ((val >> 11) & 0x100000)) as u32;
let imm21_1_signed = if imm21_1 >= 1048576 { (Wrapping(imm21_1) - Wrapping(2097152)).0 } else { imm21_1 } as i32;
let shamt = ((val >> 20) & 0x3f) as u8;
Instruction {
value,
opcode,
rs1,
rs2,
rs3,
rd,
funct7,
funct7_smaller,
funct3,
imm12_I,
imm12_S,
imm12_I_signed,
imm12_S_signed,
imm13,
imm13_signed,
imm31_12,
imm31_12_signed,
imm21_1,
imm21_1_signed,
shamt
}
}

60
src/simulator/error.rs Normal file
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@ -0,0 +1,60 @@
//! # Error
//!
//! This module contains the definition of the MachineError struct,
//! for error management in the Machine module.
//!
//! Basic usage:
//!
//! ```
//! fn example(x: bool) -> Result<(), MachineError> {
//! match x {
//! true => Ok(()),
//! _ => Err(MachineError::new("Machine failed because of ..."));
//! }
//! }
//! ```
use std::fmt;
/// Machine Error
/// This error serves as a specific exception handler for the Machine struct
#[derive(Debug, Clone)]
pub struct MachineError {
/// The error message
message: String
}
pub enum MachineOk {
Ok,
Shutdown
}
/// This impl allows this MachineError to be formatted into an empty format.
///
/// ```
/// // Result of printing a MachineError
/// let m = MachineError::new("Lorem Ipsum");
/// println!("Example: {}", m);
/// ```
///
/// Console output:Error}
/// ```
/// example Lorem Ipsum
/// ```
impl fmt::Display for MachineError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "Machine error: {}", &self.message)
}
}
impl From<&str> for MachineError {
fn from(value: &str) -> Self {
MachineError { message: value.to_string() }
}
}
impl From<String> for MachineError {
fn from(value: String) -> Self {
MachineError { message: value }
}
}

532
src/simulator/instruction.rs Normal file
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//! # Instruction
//!
//! This module describes the internal representation of a RISC-V Instruction,
//! its constructor from raw data, and a debug print method.
#![allow(clippy::missing_docs_in_private_items, non_snake_case)]
use core::num::Wrapping; // Permet d'autoriser les overflow pour les opérations voulues
use super::global::*;
/// OP instruction name mapping
const NAMES_OP: [&str; 8] = ["add", "sll", "slt", "sltu", "xor", "sr", "or", "and"];
/// OPI instruction name mapping
const NAMES_OPI: [&str; 8] = ["addi", "slli", "slti", "sltiu", "xori", "slri", "ori", "andi"];
/// OPW instruction name mapping
const NAMES_OPW: [&str; 8] = ["addw", "sllw", "", "", "", "srw", "", ""];
/// OPIW instruction name mapping
const NAMES_OPIW: [&str; 8] = ["addiw", "slliw", "", "", "", "sri", "", ""];
/// MUL instruction name mapping
const NAMES_MUL: [&str; 8] = ["mul", "mulh", "mulhsu", "mulhu", "div", "divu", "rem", "remu"];
/// BR instruction name mapping
const NAMES_BR: [&str; 8] = ["beq", "bne", "", "", "blt", "bge", "bltu", "bgeu"];
/// ST instruction name mapping
const NAMES_ST: [&str; 4] = ["sb", "sh", "sw", "sd"];
/// LD instruction name mapping
const NAMES_LD: [&str; 7] = ["lb", "lh", "lw", "ld", "lbu", "lhu", "lwu"];
/// Integer register name mapping
pub const REG_X: [&str; 32] = ["zero", "ra", "sp", "gp", "tp", "t0", "t1", "t2", "s0", "s1",
"a0", "a1", "a2", "a3", "a4", "a5", "a6", "a7",
"s2", "s3", "s4", "s5", "s6", "s7", "s8", "s9", "s10", "s11",
"t3", "t4", "t5", "t6"];
/// Floating-point register name mapping
const REG_F: [&str; 32] = ["ft0", "ft1", "ft2", "ft3", "ft4", "ft5", "ft6", "ft7", "fs0", "fs1",
"fa0", "fa1", "fa2", "fa3", "fa4", "fa5", "fa6", "fa7",
"fs2", "fs3", "fs4", "fs5", "fs6", "fs7", "fs8", "fs9", "fs10", "fs11",
"ft8", "ft9", "ft10", "ft11"];
/// RISC-V Instruction
#[derive(Debug)]
pub struct Instruction {
/// Original value used to construct self
pub value : u64,
pub opcode : u8,
pub rs1 : u8,
pub rs2 : u8,
pub rs3 : u8,
pub rd : u8,
pub funct7 : u8,
pub funct7_smaller : u8,
pub funct3 : u8,
pub shamt : u8, // shamt = imm[5:0] or imm[4:0] (depend of opcode)
pub imm12_I : u16,
pub imm12_S : u16,
pub imm12_I_signed : i16,
pub imm12_S_signed : i16,
pub imm13 : i16,
pub imm13_signed : i16,
pub imm31_12 : u32,
pub imm21_1 : u32,
pub imm31_12_signed : i32,
pub imm21_1_signed : i32,
}
impl Instruction {
/// Construct a new instruction from a big endian raw binary instruction
pub fn new(value : u64) -> Self {
let opcode = (value & 0x7f) as u8;
let rs1 = ((value >> 15) & 0x1f) as u8;
let rs2 = ((value >> 20) & 0x1f) as u8;
let rs3 = ((value >> 27) & 0x1f) as u8;
let rd = ((value >> 7) & 0x1f) as u8;
let funct7 = ((value >> 25) & 0x7f) as u8;
let funct7_smaller = funct7 & 0x3e;
let funct3 = ((value >> 12) & 0x7) as u8;
let imm12_I = ((value >> 20) & 0xfff) as u16;
let imm12_S = (((value >> 20) & 0xfe0) + ((value >> 7) & 0x1f)) as u16;
let imm12_I_signed = if imm12_I >= 2048 { (Wrapping(imm12_I) - Wrapping(4096)).0 } else { imm12_I } as i16;
let imm12_S_signed = if imm12_S >= 2048 { (Wrapping(imm12_S) - Wrapping(4096)).0 } else { imm12_S } as i16;
let imm13 = (((value >> 19) & 0x1000) + ((value >> 20) & 0x7e0) +
((value >> 7) & 0x1e) + ((value << 4) & 0x800)) as i16;
let imm13_signed = if imm13 >= 4096 { imm13 - 8192 } else { imm13 };
let imm31_12 = (value & 0xfffff000) as u32;
let imm31_12_signed = imm31_12 as i32;
let imm21_1 = ((value & 0xff000) + ((value >> 9) & 0x800) +
((value >> 20) & 0x7fe) + ((value >> 11) & 0x100000)) as u32;
let imm21_1_signed = if imm21_1 >= 1048576 { (Wrapping(imm21_1) - Wrapping(2097152)).0 } else { imm21_1 } as i32;
let shamt = ((value >> 20) & 0x3f) as u8;
Instruction {
value,
opcode,
rs1,
rs2,
rs3,
rd,
funct7,
funct7_smaller,
funct3,
imm12_I,
imm12_S,
imm12_I_signed,
imm12_S_signed,
imm13,
imm13_signed,
imm31_12,
imm31_12_signed,
imm21_1,
imm21_1_signed,
shamt
}
}
}
/// Converts an Instruction to a prettified debug String
///
/// ### Usage
///
/// ```
/// let m = Machine::new();
/// let i = Instruction::new(inst);
/// println!("{}", instruction_debug(i, m.pc));
/// ```
pub fn instruction_debug(ins: &Instruction, pc: i32) -> String {
let rd = ins.rd as usize;
let rs1 = ins.rs1 as usize;
let rs2 = ins.rs2 as usize;
let rs3 = ins.rs3 as usize;
match ins.opcode {
RISCV_OP => {
let name: &str;
if ins.funct7 == 1 { // Use mul array
name = NAMES_MUL[ins.funct3 as usize]
} else if ins.funct3 == RISCV_OP_ADD {
// Add or Sub
if ins.funct7 == RISCV_OP_ADD_ADD {
name = "add";
} else {
name = "sub";
}
} else if ins.funct3 == RISCV_OP_SR {
// Srl or Sra
if ins.funct7 == RISCV_OP_SR_SRL {
name = "srl";
} else {
name = "sra";
}
} else {
name = NAMES_OP[ins.funct3 as usize];
}
format!("{}\t{},{},{}", name, REG_X[rd], REG_X[rs1], REG_X[rs2])
},
RISCV_OPI => {
// SHAMT OR IMM
if ins.funct3 == RISCV_OPI_SRI {
if ins.funct7 == RISCV_OPI_SRI_SRLI {
format!("srli\t{},{},{}", REG_X[rd], REG_X[rs1], ins.shamt)
} else {
format!("srai\t{},{},{}", REG_X[rd], REG_X[rs1], ins.shamt)
}
} else if ins.funct3 == RISCV_OPI_SLLI {
format!("{}\t{},{},{}", NAMES_OPI[ins.funct3 as usize], REG_X[rd], REG_X[rs1], ins.shamt)
} else {
format!("{}\t{},{},{}", NAMES_OPI[ins.funct3 as usize], REG_X[rd], REG_X[rs1], ins.imm12_I_signed)
}
},
RISCV_LUI => {
format!("lui\t{},{:x}", REG_X[rd], ins.imm31_12)
},
RISCV_AUIPC => {
format!("auipc\t{},{:x}", REG_X[rd], ins.imm31_12)
},
RISCV_JAL => {
format!("jal\t{},{:x}", REG_X[rd], (pc + ins.imm21_1_signed))
},
RISCV_JALR => {
format!("jalr\t{},{:x}({})", REG_X[rd], ins.imm12_I_signed, REG_X[rs1])
},
RISCV_BR => {
format!("{}\t{},{},{:x}", NAMES_BR[ins.funct3 as usize], REG_X[rs1], REG_X[rs2], pc + (ins.imm13_signed as i32))
},
RISCV_LD => {
format!("{}\t{},{}({})", NAMES_LD[ins.funct3 as usize], REG_X[rd], ins.imm12_I_signed, REG_X[rs1])
},
RISCV_ST => {
format!("{}\t{},{}({})", NAMES_ST[ins.funct3 as usize], REG_X[rs2], ins.imm12_S_signed, REG_X[rs1])
},
RISCV_OPIW => {
if ins.funct3 == RISCV_OPIW_SRW {
if ins.funct7 == RISCV_OPIW_SRW_SRLIW {
format!("srliw\t{},{},{}", REG_X[rd], REG_X[rs1], REG_X[rs2])
} else {
format!("sraiw\t{},{},{}", REG_X[rd], REG_X[rs1], REG_X[rs2])
}
} else {
format!("{}\t{},{},0x{:x}", NAMES_OPIW[ins.funct3 as usize], REG_X[rd], REG_X[rs1], ins.imm12_I_signed)
}
},
RISCV_OPW => {
if ins.funct7 == 1 {
format!("{}w\t{},{},{}", NAMES_MUL[ins.funct3 as usize], REG_X[rd], REG_X[rs1], REG_X[rs2])
} else if ins.funct3 == RISCV_OP_ADD {
if ins.funct7 == RISCV_OPW_ADDSUBW_ADDW {
format!("addw\t{},{},{}", REG_X[rd], REG_X[rs1], REG_X[rs2])
} else {
format!("subw\t{},{},{}", REG_X[rd], REG_X[rs1], REG_X[rs2])
}
} else if ins.funct3 == RISCV_OPW_SRW {
if ins.funct7 == RISCV_OPW_SRW_SRLW {
format!("srlw\t{},{},{}", REG_X[rd], REG_X[rs1], REG_X[rs2])
} else {
format!("sraw\t{},{},{}", REG_X[rd], REG_X[rs1], REG_X[rs2])
}
} else {
format!("{}\t{},{},{}", NAMES_OPW[ins.funct3 as usize], REG_X[rd], REG_X[rs1], REG_X[rs2])
}
},
// RV32F Standard Extension
RISCV_FLW => {
format!("flw\t{},{},({})", REG_F[rd], ins.imm12_I_signed, REG_F[rs1])
},
RISCV_FSW => {
format!("fsw\t{},{},({})", REG_F[rs2], "OFFSET TODO", REG_F[rs1]) // TODO Offset in decode
},
RISCV_FMADD => {
format!("fmadd\t{}{}{}{}", REG_F[rd], REG_F[rs1], REG_F[rs2], REG_F[rs3])
},
RISCV_FMSUB => {
format!("fmsub\t{}{}{}{}", REG_F[rd], REG_F[rs1], REG_F[rs2], REG_F[rs3])
},
RISCV_FNMSUB => {
format!("fnmsub\t{}{}{}{}", REG_F[rd], REG_F[rs1], REG_F[rs2], REG_F[rs3])
},
RISCV_FNMADD => {
format!("fnmadd\t{}{}{}{}", REG_F[rd], REG_F[rs1], REG_F[rs2], REG_F[rs3])
},
RISCV_FP => {
match ins.funct7 {
RISCV_FP_ADD => {
format!("{}\t{}{}{}", "fadd", REG_F[rd], REG_F[rs1], REG_F[rs2])
},
RISCV_FP_SUB => {
format!("{}\t{}{}{}", "fsub.s", REG_F[rd], REG_F[rs1], REG_F[rs2])
},
RISCV_FP_MUL => {
format!("{}\t{}{}{}", "fmul.s", REG_F[rd], REG_F[rs1], REG_F[rs2])
},
RISCV_FP_DIV => {
format!("{}\t{}{}{}", "fdiv.s", REG_F[rd], REG_F[rs1], REG_F[rs2])
},
RISCV_FP_SQRT => {
format!("{}\t{}{}", "fsqrt.s", REG_F[rd], REG_F[rs1])
},
RISCV_FP_FSGN => {
match ins.funct3 {
RISCV_FP_FSGN_J => {
format!("{}\t{}{}{}", "fsgnj.s", REG_F[rd], REG_F[rs1], REG_F[rs2])
},
RISCV_FP_FSGN_JN => {
format!("{}\t{}{}{}", "fsgnn.s", REG_F[rd], REG_F[rs1], REG_F[rs2])
},
RISCV_FP_FSGN_JX => {
format!("{}\t{}{}{}", "fsgnx.s", REG_F[rd], REG_F[rs1], REG_F[rs2])
},
_ => todo!("Unknown code")
}
},
RISCV_FP_MINMAX => {
if ins.funct3 == 0 {
format!("{}\t{}{}{}", "fmin.s", REG_F[rd], REG_F[rs1], REG_F[rs2])
} else {
format!("{}\t{}{}{}", "fmax.s", REG_F[rd], REG_F[rs1], REG_F[rs2])
}
},
RISCV_FP_FCVTW => {
if rs2 == 0 {
format!("{}\t{}{}", "fcvt.w.s", REG_F[rd], REG_F[rs1])
} else {
format!("{}\t{}{}", "fcvt.wu.s", REG_F[rd], REG_F[rs1])
}
},
RISCV_FP_FMVXFCLASS => {
if ins.funct3 == 0 {
format!("{}\t{}{}", "fmv.x.w", REG_F[rd], REG_F[rs1])
} else {
format!("{}\t{}{}", "fclass.s", REG_F[rd], REG_F[rs1])
}
},
RISCV_FP_FCMP => {
if ins.funct3 == 0 {
format!("{}\t{}{}{}", "fle.s", REG_F[rd], REG_F[rs1], REG_F[rs2])
} else if ins.funct3 == 1 {
format!("{}\t{}{}{}", "flt.s", REG_F[rd], REG_F[rs1], REG_F[rs2])
} else {
format!("{}\t{}{}{}", "feq.s", REG_F[rd], REG_F[rs1], REG_F[rs2])
}
},
RISCV_FP_FCVTS => {
if rs2 == 0 {
format!("{}\t{}{}", "fcvt.s.w", REG_F[rd], REG_F[rs1])
} else {
format!("{}\t{}{}", "fcvt.s.wu", REG_F[rd], REG_F[rs1])
}
},
RISCV_FP_FMVW => {
format!("{}\t{}{}", "fmv.w.x", REG_F[rd], REG_F[rs1])
},
_ => todo!("Unknown code")
}
},
RISCV_SYSTEM => {
"ecall".to_string()
},
_ => todo!("{:x} opcode non géré pc : {:x}, value : {:x}", ins.opcode, pc, ins.value) // Change todo! to panic! in the future, I put todo! because there's a lot of opcode currently not implemented
}
}
#[cfg(test)]
mod test {
#![allow(clippy::unusual_byte_groupings)]
use crate::simulator::instruction::*;
#[test]
fn test_op() {
let sub = Instruction::new(0b0100000_10000_10001_000_11100_0110011);
let add = Instruction::new(0b0000000_10000_10001_000_11100_0110011);
let xor = Instruction::new(0b0000000_10000_10001_100_11100_0110011);
let slr = Instruction::new(0b0000000_10000_10001_101_11100_0110011);
let sra = Instruction::new(0b0100000_10000_10001_101_11100_0110011);
assert_eq!("sub\tt3,a7,a6", instruction_debug(&sub, 0));
assert_eq!("xor\tt3,a7,a6", instruction_debug(&xor, 0));
assert_eq!("srl\tt3,a7,a6", instruction_debug(&slr, 0));
assert_eq!("sra\tt3,a7,a6", instruction_debug(&sra, 0));
assert_eq!("add\tt3,a7,a6", instruction_debug(&add, 0));
}
#[test]
fn test_opi() {
let addi = Instruction::new(0b0000000000_10001_000_11100_0010011);
let slli = Instruction::new(0b0000000000_10001_001_11100_0010011);
let slti = Instruction::new(0b0000000000_10001_010_11100_0010011);
let sltiu = Instruction::new(0b0000000000_10001_011_11100_0010011);
let xori = Instruction::new(0b_0000000000010001_100_11100_0010011);
let ori = Instruction::new(0b00000000000_10001_110_11100_0010011);
let andi = Instruction::new(0b000000000000_10001_111_11100_0010011);
assert_eq!("andi\tt3,a7,0", instruction_debug(&andi, 0));
assert_eq!("addi\tt3,a7,0", instruction_debug(&addi, 0));
assert_eq!("slli\tt3,a7,0", instruction_debug(&slli, 0));
assert_eq!("slti\tt3,a7,0", instruction_debug(&slti, 0));
assert_eq!("sltiu\tt3,a7,0", instruction_debug(&sltiu, 0));
assert_eq!("xori\tt3,a7,0", instruction_debug(&xori, 0));
assert_eq!("ori\tt3,a7,0", instruction_debug(&ori, 0));
}
#[test]
fn test_lui() {
let lui = Instruction::new(0b01110001000011111000_11100_0110111);
let lui_negatif = Instruction::new(0b11110001000011111000_11100_0110111);
assert_eq!("lui\tt3,710f8000", instruction_debug(&lui, 0));
assert_eq!("lui\tt3,f10f8000", instruction_debug(&lui_negatif, 0));
}
#[test]
fn test_ld() {
// imm rs1 f3 rd opcode
let lb = Instruction::new(0b010111110000_10001_000_11100_0000011);
let lh = Instruction::new(0b010111110000_10001_001_11100_0000011);
let lw = Instruction::new(0b010111110000_10001_010_11100_0000011);
let lbu = Instruction::new(0b010111110000_10001_100_11100_0000011);
let lhu = Instruction::new(0b010111110000_10001_101_11100_0000011);
let ld = Instruction::new(0b010111110000_10001_011_11100_0000011);
let lwu = Instruction::new(0b010111110000_10001_110_11100_0000011);
assert_eq!("lb\tt3,1520(a7)", instruction_debug(&lb, 0));
assert_eq!("lh\tt3,1520(a7)", instruction_debug(&lh, 0));
assert_eq!("lw\tt3,1520(a7)", instruction_debug(&lw, 0));
assert_eq!("lbu\tt3,1520(a7)", instruction_debug(&lbu, 0));
assert_eq!("lhu\tt3,1520(a7)", instruction_debug(&lhu, 0));
assert_eq!("ld\tt3,1520(a7)", instruction_debug(&ld, 0));
assert_eq!("lwu\tt3,1520(a7)", instruction_debug(&lwu, 0));
}
#[test]
fn test_opw() {
let addw: Instruction = Instruction::new(0b0000000_10000_10001_000_11100_0111011);
let sllw: Instruction = Instruction::new(0b0000000_10000_10001_001_11100_0111011);
let srlw: Instruction = Instruction::new(0b0000000_10000_10001_101_11100_0111011);
let sraw: Instruction = Instruction::new(0b0100000_10000_10001_101_11100_0111011);
assert_eq!("addw\tt3,a7,a6", instruction_debug(&addw, 0));
assert_eq!("sllw\tt3,a7,a6", instruction_debug(&sllw, 0));
assert_eq!("srlw\tt3,a7,a6", instruction_debug(&srlw, 0));
assert_eq!("sraw\tt3,a7,a6", instruction_debug(&sraw, 0));
}
#[test]
fn test_opwi() {
let addiw: Instruction =Instruction::new(0b000000000000_10001_000_11100_0011011);
let slliw: Instruction = Instruction::new(0b0000000_10000_10001_001_11100_0011011);
let srai: Instruction = Instruction::new(0b010000010001_10001_101_11100_0010011);
assert_eq!("addiw\tt3,a7,0x0", instruction_debug(&addiw, 0));
assert_eq!("slliw\tt3,a7,0x10", instruction_debug(&slliw, 0));
assert_eq!("srai\tt3,a7,17", instruction_debug(&srai, 0));
}
#[test]
fn test_br() {
let beq: Instruction = Instruction::new(0b0000000_10000_10001_000_00000_1100011);
let bne: Instruction = Instruction::new(0b0000000_10000_10001_001_00000_1100011);
let blt: Instruction = Instruction::new(0b0000000_10000_10001_100_00000_1100011);
let bge: Instruction = Instruction::new(0b0000000_10000_10001_101_00000_1100011);
let bge2: Instruction = Instruction::new(0x00f75863);
let bltu: Instruction = Instruction::new(0b0000000_10000_10001_110_00000_1100011);
let bgeu: Instruction = Instruction::new(0b0000000_10000_10001_111_00000_1100011);
assert_eq!("blt\ta7,a6,0", instruction_debug(&blt, 0));
assert_eq!("bge\ta7,a6,0", instruction_debug(&bge, 0));
assert_eq!("bge\ta4,a5,104d4", instruction_debug(&bge2, 0x104c4));
assert_eq!("bltu\ta7,a6,0", instruction_debug(&bltu, 0));
assert_eq!("bgeu\ta7,a6,0", instruction_debug(&bgeu, 0));
assert_eq!("bne\ta7,a6,0", instruction_debug(&bne, 0));
assert_eq!("beq\ta7,a6,0", instruction_debug(&beq, 0));
}
#[test]
fn test_small_program() {
/* Code for :
int a = 0;
int b = 5;
a = b;
a = a * b;
a = a + b;
b = a - b;
*/
assert_eq!("addi sp,sp,-32", instruction_debug(&Instruction::new(0xfe010113), 0));
assert_eq!("sd s0,24(sp)", instruction_debug(&Instruction::new(0x00813c23), 0));
assert_eq!("addi s0,sp,32", instruction_debug(&Instruction::new(0x02010413), 0));
assert_eq!("sw zero,-20(s0)", instruction_debug(&Instruction::new(0xfe042623), 0));
assert_eq!("addi a5,zero,5", instruction_debug(&Instruction::new(0x00500793), 0));
assert_eq!("sw a5,-24(s0)", instruction_debug(&Instruction::new(0xfef42423), 0));
assert_eq!("lw a5,-24(s0)", instruction_debug(&Instruction::new(0xfe842783), 0));
assert_eq!("sw a5,-20(s0)", instruction_debug(&Instruction::new(0xfef42623), 0));
assert_eq!("lw a5,-20(s0)", instruction_debug(&Instruction::new(0xfec42783), 0));
assert_eq!("addi a4,a5,0", instruction_debug(&Instruction::new(0x00078713), 0));
assert_eq!("lw a5,-24(s0)", instruction_debug(&Instruction::new(0xfe842783), 0));
assert_eq!("mulw a5,a4,a5", instruction_debug(&Instruction::new(0x02f707bb), 0));
assert_eq!("sw a5,-20(s0)", instruction_debug(&Instruction::new(0xfef42623), 0));
assert_eq!("lw a5,-20(s0)", instruction_debug(&Instruction::new(0xfec42783), 0));
assert_eq!("addi a4,a5,0", instruction_debug(&Instruction::new(0x00078713), 0));
assert_eq!("lw a5,-24(s0)", instruction_debug(&Instruction::new(0xfe842783), 0));
assert_eq!("addw a5,a4,a5", instruction_debug(&Instruction::new(0x00f707bb), 0));
assert_eq!("sw a5,-20(s0)", instruction_debug(&Instruction::new(0xfef42623), 0));
assert_eq!("lw a5,-20(s0)", instruction_debug(&Instruction::new(0xfec42783), 0));
assert_eq!("addi a4,a5,0", instruction_debug(&Instruction::new(0x00078713), 0));
assert_eq!("lw a5,-24(s0)", instruction_debug(&Instruction::new(0xfe842783), 0));
assert_eq!("subw a5,a4,a5", instruction_debug(&Instruction::new(0x40f707bb), 0));
assert_eq!("sw a5,-24(s0)", instruction_debug(&Instruction::new(0xfef42423), 0));
assert_eq!("addi a5,zero,0", instruction_debug(&Instruction::new(0x00000793), 0));
assert_eq!("addi a0,a5,0", instruction_debug(&Instruction::new(0x00078513), 0));
assert_eq!("ld s0,24(sp)", instruction_debug(&Instruction::new(0x01813403), 0));
assert_eq!("addi sp,sp,32", instruction_debug(&Instruction::new(0x02010113), 0));
assert_eq!("jalr zero,0(ra)", instruction_debug(&Instruction::new(0x00008067), 0));
}
#[test]
fn test_fibo() {
assert_eq!("jal zero,10504", instruction_debug(&Instruction::new(0x0500006f), 0x104b4));
assert_eq!("blt a4,a5,104b8", instruction_debug(&Instruction::new(0xfaf740e3), 0x10518));
}
#[test]
fn test_mul_prog() {
assert_eq!("addi sp,sp,-32", instruction_debug(&Instruction::new(0xfe010113), 0));
assert_eq!("sd s0,24(sp)", instruction_debug(&Instruction::new(0x00813c23), 0));
assert_eq!("addi s0,sp,32", instruction_debug(&Instruction::new(0x02010413), 0));
assert_eq!("addi a5,zero,5", instruction_debug(&Instruction::new(0x00500793), 0));
assert_eq!("sw a5,-20(s0)", instruction_debug(&Instruction::new(0xfef42623), 0));
assert_eq!("lw a5,-20(s0)", instruction_debug(&Instruction::new(0xfec42783), 0));
assert_eq!("addi a4,a5,0", instruction_debug(&Instruction::new(0x00078713), 0));
assert_eq!("addi a5,a4,0", instruction_debug(&Instruction::new(0x00070793), 0));
assert_eq!("slliw a5,a5,0x2", instruction_debug(&Instruction::new(0x0027979b), 0));
assert_eq!("addw a5,a5,a4", instruction_debug(&Instruction::new(0x00e787bb), 0));
assert_eq!("sw a5,-24(s0)", instruction_debug(&Instruction::new(0xfef42423), 0));
assert_eq!("lw a5,-20(s0)", instruction_debug(&Instruction::new(0xfec42783), 0));
assert_eq!("addi a4,a5,0", instruction_debug(&Instruction::new(0x00078713), 0));
assert_eq!("lw a5,-24(s0)", instruction_debug(&Instruction::new(0xfe842783), 0));
assert_eq!("mulw a5,a4,a5", instruction_debug(&Instruction::new(0x02f707bb), 0));
assert_eq!("sw a5,-28(s0)", instruction_debug(&Instruction::new(0xfef42223), 0));
assert_eq!("lw a5,-28(s0)", instruction_debug(&Instruction::new(0xfe442783), 0));
assert_eq!("addi a4,a5,0", instruction_debug(&Instruction::new(0x00078713), 0));
assert_eq!("lw a5,-24(s0)", instruction_debug(&Instruction::new(0xfe842783), 0));
assert_eq!("divw a5,a4,a5", instruction_debug(&Instruction::new(0x02f747bb), 0));
assert_eq!("sw a5,-20(s0)", instruction_debug(&Instruction::new(0xfef42623), 0));
assert_eq!("addi a5,zero,0", instruction_debug(&Instruction::new(0x00000793), 0));
assert_eq!("addi a0,a5,0", instruction_debug(&Instruction::new(0x00078513), 0));
assert_eq!("ld s0,24(sp)", instruction_debug(&Instruction::new(0x01813403), 0));
assert_eq!("addi sp,sp,32", instruction_debug(&Instruction::new(0x02010113), 0));
assert_eq!("jalr zero,0(ra)", instruction_debug(&Instruction::new(0x00008067), 0));
}
}

42
src/simulator/interrupt.rs Normal file
View File

@ -0,0 +1,42 @@
#[derive(PartialEq)]
pub struct Interrupt {
level: InterruptStatus
}
impl Interrupt {
pub fn new() -> Self {
Self {
level: InterruptStatus::InterruptOff
}
}
pub fn set_status(&mut self, new_status: InterruptStatus) -> InterruptStatus {
let old = self.level;
self.level = new_status;
if new_status == InterruptStatus::InterruptOn && old == InterruptStatus::InterruptOff {
self.one_tick(1);
}
old
}
fn one_tick(&self, nb_cycle: i32) {
todo!();
}
pub fn get_status(&self) -> InterruptStatus {
self.level
}
pub fn idle(&self) {
// todo!();
}
}
#[derive(PartialEq, Clone, Copy, Debug)]
pub enum InterruptStatus {
InterruptOff,
InterruptOn
}

647
src/simulator/loader.rs
View File

@ -1,34 +1,627 @@
use crate::Machine; use crate::Machine;
use std::fs; use std::fs;
use std::io; use std::io::Read;
use std::io::BufRead;
/// The elf header defines principes aspects of the binary files, it's place at the start of the file
/// see <https://en.wikipedia.org/wiki/Executable_and_Linkable_Format#File_header> for more informations
/// Load a file into a new machine pub struct ElfHeader {
/// Defines whether the file is big or little endian
/// true correspond to big endian, false otherwise
/// ///
/// `panic!` when size is not 1, 2, 4 or 8 /// Offset: 0x05, size: 1 byte
/// `panic!` when the text does not represents instructions in hexadecimal pub endianess: bool,
/// Defines whether the file is 32 bits or 64 bits
/// ///
/// ### Parameters /// Offset: 0x04, size: 1 byte
pub is_32bits: bool,
/// Version of the elf file, current version is 1
/// ///
/// - **path** the path of the file to load /// Offset: 0x06, size: 1 byte
/// - **size** the number of bytes to write (1, 2, 4 or 8) pub version: u8,
pub fn _load(path : &str, instruction_size: i32) -> Machine { /// Identifies the target ABI.
let file = fs::File::open(path).expect("Wrong filename"); ///
let reader = io::BufReader::new(file); /// In this implementation: Defines if the target abi is system V compliant
let mut machine = Machine::_init_machine(); ///
/// Offset: 0x07, size: 1 byte
for (i,line) in reader.lines().enumerate() { pub sys_v_abi: bool,
let res = u64::from_str_radix(&line.unwrap(), 16); /// Identifies target ISA, 0xF3 correspond to RISC-V
match res { ///
Ok(value) => { /// In this implementatio, true if target isa is RISC-V, false otherwise
Machine::write_memory(&mut machine, instruction_size, i*instruction_size as usize, value); ///
}, /// Offset: 0x12, size: 2 bytes
_ => panic!() pub is_riscv_target: bool,
} /// Memory address of the entry point from w<here the process starts its execution.
} /// If the program doesn't have an entrypoint (i.e. not an executable), the value is 0
println!("{:x}", Machine::read_memory(& mut machine, 4, 0)); ///
machine /// Offset: 0x18, size: 4 (32 bits) or 8 (64 bits)
pub entrypoint: u64,
/// Size of the elf header, 64 bytes for 64 bits and 52 for 32 bits
///
/// Offset: 0x28(32 bits) or 0x34 (64 bits), size: 2 bytes
pub elf_header_size: u16,
/// Position of the first program header entry
///
/// Offset: 0x1C (32 bits) or 0x20 (64 bits), size: 4 (32 bits) or 8 (64 bits) bytes
pub program_header_location: u64,
/// Number of entries in the progream header table
///
/// Offset: 0x2C (32 bits) or 0x38 (64 bits), size: 2 bytes
pub program_header_entries: u16,
/// Size of a program header entry
///
/// Offset: 0x2A (32 bits) or 0x36 (64 bits), size: 2 bytes
pub program_header_size: u16,
/// Position of the first section header entry
///
/// Offset: 0x20 (32 bits) or 0x28 (64 bits), size: 4 (32 bits) or 8 (64 bits) bytes
pub section_header_location: u64,
/// Number of entries in the section header table
///
/// Offset: 0x30 (32 bits) or 0x3C (64 bits), size: 2 bytes
pub section_header_entries: u16,
/// Size of a section header entry
///
/// Offset: 0x2E (32 bits) or 0x36 (64 bits), size: 2 bytes
pub section_header_size: u16,
}
impl ElfHeader {
/// return true if the 4 first bytes constitude the elf magic number
fn is_elf(instructions: &[u8]) -> bool {
instructions.get(0..4) == Option::Some(&[0x7f, 0x45, 0x4c, 0x46])
}
/// return true if big endian, false otherwise
fn check_endianess(instructions: &[u8]) -> bool {
instructions.get(5) == Option::Some(&2)
}
/// return true if file is 32 bits, false if 64 bits
fn is_32bits(instructions: &[u8]) -> bool {
instructions.get(4) == Option::Some(&1)
}
/// return the version of the elf file (should be 1)
/// Can be None if the file is smaller than 7 bytes -> the file is invalid
fn get_version(instructions: &[u8]) -> Option<u8> {
instructions.get(6).copied() // work as primitives implements Copy
}
/// return true if target abi of the binary file is System V, false otherwise
fn is_system_v_elf(instructions: &[u8]) -> bool {
instructions.get(7) == Option::Some(&0)
}
/// return true if specified target instruction set architecture is RISCV
fn is_riscv_isa(instructions: &[u8]) -> bool {
Self::get_u16_value(instructions, 0x12) == Option::Some(0xf3)
}
/// memory address of the entry point from where the process starts its execution
///
/// ## Paramters:
///
/// **instructions** List of bytes of the loaded binary file
/// **is_32bits** defines whether the binary file is 32 bits or 64 bits
fn get_entrypoint(instructions: &[u8], is_32bits: bool) -> Option<u64> {
if is_32bits {
get_address_point(instructions, 0x18, true)
} else {
get_address_point(instructions, 0x18, false)
}
}
/// Memory address of the start of the program header table
///
/// ## Paramters:
///
/// **instructions** List of bytes of the loaded binary file
/// **is_32bits** defines whether the binary file is 32 bits or 64 bits
fn get_program_header_table_location(instructions: &[u8], is_32bits: bool) -> Option<u64> {
if is_32bits {
get_address_point(instructions, 0x1c, true)
} else {
get_address_point(instructions, 0x20, false)
}
}
/// Memory address of the start of the section header table
///
/// ## Paramters:
///
/// **instructions** List of bytes of the loaded binary file
/// **is_32bits** defines whether the binary file is 32 bits or 64 bits
fn get_section_header_table_location(instructions: &[u8], is_32bits: bool) -> Option<u64> {
if is_32bits {
get_address_point(instructions, 0x20, true)
} else {
get_address_point(instructions, 0x28, false)
}
}
/// Return the size of the header, normally, 0x40 for 64 bits bin and 0x34 for 32 bits
///
/// ## Paramters:
///
/// **instructions** List of bytes of the loaded binary file
/// **is_32bits** defines whether the binary file is 32 bits or 64 bits
fn get_elf_header_size(instructions: &[u8], is_32bits: bool) -> Option<u16> {
let address = if is_32bits { 0x28 } else { 0x34 };
Self::get_u16_value(instructions, address)
}
/// return the size of a program header table entry
///
/// ## Paramters:
///
/// **instructions** List of bytes of the loaded binary file
/// **is_32bits** defines whether the binary file is 32 bits or 64 bits
fn get_program_header_size(instructions: &[u8], is_32bits: bool) -> Option<u16> {
let address = if is_32bits { 0x2a } else { 0x36 };
Self::get_u16_value(instructions, address)
}
/// return the number of entries in the program header
///
/// ## Paramters:
///
/// **instructions** List of bytes of the loaded binary file
/// **is_32bits** defines whether the binary file is 32 bits or 64 bits
fn get_number_entries_program_header(instructions: &[u8], is_32bits: bool) -> Option<u16> {
let address = if is_32bits { 0x2c } else { 0x38 };
Self::get_u16_value(instructions, address)
}
/// Return the size of a section header table entry
///
/// ## Paramters:
///
/// **instructions** List of bytes of the loaded binary file
/// **is_32bits** defines whether the binary file is 32 bits or 64 bits
fn get_section_header_size(instructions: &[u8], is_32bits: bool) -> Option<u16> {
let address = if is_32bits { 0x2e } else { 0x3a };
Self::get_u16_value(instructions, address)
}
/// Return the number of entries in the section header
///
/// ## Paramters:
///
/// **instructions** List of bytes of the loaded binary file
/// **is_32bits** defines whether the binary file is 32 bits or 64 bits
fn get_section_header_num_entries(instructions: &[u8], is_32bits: bool) -> Option<u16> {
let address = if is_32bits { 0x30 } else { 0x3c };
Self::get_u16_value(instructions, address)
}
/// Return a u16 value, usually for the size or the number of entries inside a header
///
/// This method retrieve 2 bytes and concatenate them assuming the file is little endian
///
/// ## Paramters:
///
/// **instructions** List of bytes of the loaded binary file
/// **address** Position of the first byte
fn get_u16_value(instructions: &[u8], address: usize) -> Option<u16> {
let mut bytes: [u8; 2] = [0; 2];
bytes[0] = instructions.get(address).copied()?;
bytes[1] = instructions.get(address + 1).copied()?;
Option::Some(u16::from_le_bytes(bytes))
}
}
impl TryFrom<&Vec<u8>> for ElfHeader {
type Error = String;
fn try_from(instructions: &Vec<u8>) -> Result<Self, Self::Error> {
if Self::is_elf(instructions) {
let format = Self::is_32bits(instructions);
let endianess = Self::check_endianess(instructions);
let version = Self::get_version(instructions).ok_or("Cannot retrieve version")?;
let is_sys_v_abi = Self::is_system_v_elf(instructions);
let is_rv_target = Self::is_riscv_isa(instructions);
let entrypoint = Self::get_entrypoint(instructions, format).ok_or("Cannot get entrypoint")?;
let elf_header_size = Self::get_elf_header_size(instructions, format).ok_or("Cannot get elf header size")?;
let program_header_location = Self::get_program_header_table_location(instructions, format).ok_or("Cannot get program header table location")?;
let program_header_entries = Self::get_number_entries_program_header(instructions, format).ok_or("Cannot get number of entries in program header table")? ;
let program_header_size = Self::get_program_header_size(instructions, format).ok_or("Cannot get program header entry size")?;
let section_header_location = Self::get_section_header_table_location(instructions, format).ok_or("Cannot get section header table location")?;
let section_header_entries = Self::get_section_header_num_entries(instructions, format).ok_or("Cannot get number of entries of section header")?;
let section_header_size = Self::get_section_header_size(instructions, format).ok_or("Cannot get size of section header entry")?;
Ok(ElfHeader {
endianess,
is_32bits: format,
version,
sys_v_abi: is_sys_v_abi,
is_riscv_target: is_rv_target,
entrypoint,
elf_header_size,
program_header_location,
program_header_entries,
program_header_size,
section_header_location,
section_header_entries,
section_header_size
})
} else {
Err("File doesn't have elf magic number")?
}
}
}
/// Flag of a section, a section can have multiples flags by adding the values
#[allow(clippy::enum_variant_names)]
#[allow(dead_code)]
pub enum FlagValue {
/// The section is writable
ShfWrite = 0x1,
/// The section need to be allocate/occupe memory during execution
ShfAlloc = 0x2,
/// The section need to be executable
ShfExecinstr = 0x4,
/// Section might ber merged
ShfMerge = 0x10,
/// Contain null-terminated (\0) strings
ShfStrings = 0x20,
// There is others but are unrelevant (I think)
}
/// Section header entry, contains useful informations for each sections of the binary file
///
/// see <https://en.wikipedia.org/wiki/Executable_and_Linkable_Format#Section_header>
#[derive(Debug)]
pub struct SectionHeader {
/// Offset to a string in .shstrtab section that represent the name of this section
///
/// Offset: 0x0, size: 4 bytes
pub name_offset: u32,
/// Identify the type of this header
///
/// Offset: 0x4, size: 4 bytes
pub header_type: u32,
/// Identify the atributes of this section
///
/// see `Self::does_flag_contains_key(self, FlagValue)`
///
/// Offset: 0x8, size: 4 (32 bits) or 8 (64 bits) bytes
pub flags: u64,
/// Virtual address of the section in memory if section is loaded, 0x0 otherwise
///
/// Offset: 0x0C (32 bits) or 0x10 (64 bits), size: 4 (32 bits) or 8 (64 bits) bytes
pub virt_addr: u64,
/// Offset of the section in the file image (binary file)
///
/// Offset: 0x10 (32 bits) or 0x18 (64 bits), size: 4 (32 bits) or 8 (64 bits) bytes
pub image_offset: u64,
/// Size of the section in the file image, may be 0
///
/// Offset: 0x14 (32 bits) or 0x20 (64 bits), size: 4 (32 bits) or 8 (64 bits) bytes
pub section_size: u64,
pub section_link: u32,
pub section_info: u32,
/// Contain the required alignment of the section, must be a power of 2
///
/// Offset: 0x20 (32 bits) or 0x30 (64 bits), size: 4 (32 bits) or 8 (64 bits) bytes
pub required_align: u64,
/// Contain the size of each entry, for sections that contain fixed size entries, otherwise 0
///
/// Offset: 0x24 (32 bits) or 0x38 (64 bits), size: 4 (32 bits) or 8 (64 bits) bytes
pub entry_size: u64
}
impl SectionHeader {
/// return true if flag of this section contains / have `key`, false otherwise
pub fn does_flag_contains_key(&self, key: FlagValue) -> bool {
self.flags & key as u64 != 0
}
/// Return the offset to a string in .shstrtab that represents the name of this section
fn get_name_offset(instructions: &[u8], address: usize) -> Option<u32> {
get_address_point(instructions, address, true).map(|v| { v as u32 })
// set true to return a u32
}
/// Return the type of header of the section
fn get_header_type(instructions: &[u8], address: usize) -> Option<u32> {
get_address_point(instructions, address + 0x4, true).map(|v| { v as u32 })
}
/// Return the flags of the section, can hold multiples values, see [`FlagValue`]
fn get_flags(instructions: &[u8], address: usize, is_32bits: bool) -> Option<u64> {
get_address_point(instructions, address + 0x8, is_32bits)
}
/// Return the virtual address of the section in memory if the sectino is loaded(see section flag), otherwise 0
fn get_virtual_address(instructions: &[u8], address: usize, is_32bits: bool) -> Option<u64> {
get_address_point(instructions, address + if is_32bits { 0x0C } else { 0x10 }, is_32bits)
}
/// Return the offset of the section in the file image (binary file)
fn get_image_offset(instructions: &[u8], address: usize, is_32bits: bool) -> Option<u64> {
get_address_point(instructions, address + if is_32bits { 0x10 } else { 0x18 }, is_32bits)
}
/// Return the size of the section in the file image (binary file), may be 0
fn get_section_size(instructions: &[u8], address: usize, is_32bits: bool) -> Option<u64> {
get_address_point(instructions, address + if is_32bits { 0x14 } else { 0x20 }, is_32bits)
}
fn get_section_link(instructions: &[u8], address: usize, is_32bits: bool) -> Option<u32> {
get_address_point(instructions, address + if is_32bits { 0x18 } else { 0x28 }, false).map(|v| { v as u32 })
}
fn get_section_info(instructions: &[u8], address: usize, is_32bits: bool) -> Option<u32> {
get_address_point(instructions, address + if is_32bits { 0x1C } else { 0x2C }, false).map(|v| { v as u32 })
}
/// Return the required alignment of the section, must be a power of 2
fn get_required_align(instructions: &[u8], address: usize, is_32bits: bool) -> Option<u64> {
get_address_point(instructions, address + if is_32bits { 0x20 } else { 0x30 }, is_32bits)
}
/// Contain the size of each entry for sections that contain fixed-size entries, otherwise 0
fn get_entry_size(instructions: &[u8], address: usize, is_32bits: bool) -> Option<u64> {
get_address_point(instructions, address + if is_32bits { 0x24 } else { 0x38 }, is_32bits)
}
}
impl TryFrom<(&[u8], u64, bool)> for SectionHeader {
type Error = ();
fn try_from(value: (&[u8], u64, bool)) -> Result<Self, Self::Error> {
let instructions = value.0;
let address = value.1 as usize;
let is_32bits = value.2;
let name_offset = Self::get_name_offset(instructions, address).ok_or(())?;
let header_type = Self::get_header_type(instructions, address).ok_or(())?;
let attribute = Self::get_flags(instructions, address, is_32bits).ok_or(())?;
let virt_addr = Self::get_virtual_address(instructions, address, is_32bits).ok_or(())?;
let image_offset = Self::get_image_offset(instructions, address, is_32bits).ok_or(())?;
let section_size = Self::get_section_size(instructions, address, is_32bits).ok_or(())?;
let section_link = Self::get_section_link(instructions, address, is_32bits).ok_or(())?;
let section_info = Self::get_section_info(instructions, address, is_32bits).ok_or(())?;
let required_align = Self::get_required_align(instructions, address, is_32bits).ok_or(())?;
let entry_size = Self::get_entry_size(instructions, address, is_32bits).ok_or(())?;
Ok(Self { name_offset,
header_type,
flags: attribute,
virt_addr,
image_offset,
section_size,
section_link,
section_info,
required_align,
entry_size
})
}
}
/// Error enum for [`Loader`]
#[derive(Debug)]
pub enum LoaderError {
/// Correspond to std IO error
IOError(std::io::Error),
/// Others errors
ParsingError(String)
}
/// Global structure of the loader, one instance per loaded files
pub struct Loader {
/// List of bytes inside the binary file
bytes: Vec<u8>,
/// Elf header, see [`ElfHeader`] for more informations
pub elf_header: ElfHeader,
/// Section header table entries, see [`SectionHeader`] for more informations
pub sections: Vec<SectionHeader>
}
impl Loader {
/// # Loader constructor
///
/// Load the binary file given in parameter, parse it and load inside the machine memory
/// return the loader instance and the location of the end of the last a allocated section in memory
///
/// ## Parameters
///
/// **path**: location of the binary file on disk
/// **machine**: well, the risc-v simulator
/// **start_index**: The position at which you want to start to allocate the program
pub fn new(path: &str, machine: &mut Machine, start_index: usize) -> Result<(Self, u64), LoaderError> {
let loader = Self::load_and_parse(path)?;
let end_alloc = loader.load_into_machine(machine, start_index)?;
Ok((loader, end_alloc))
}
/// Try to load the binary file in memory after it been parsed
///
/// Binary file is loaded according to sections order and rules, see [`SectionHeader`]
///
/// Return the location of the end of the last a allocated section in memory
fn load_into_machine(&self, machine: &mut Machine, start_index: usize) -> Result<u64, LoaderError> {
let mut end_index = 0;
for i in 0..self.sections.len() {
let section = &self.sections[i];
if section.does_flag_contains_key(FlagValue::ShfAlloc) {
end_index = section.virt_addr + section.section_size;
// Can allocate to machine memory
for j in (0..section.section_size as usize).step_by(4) {
let mut buf: [u8; 4] = [0; 4];
#[allow(clippy::needless_range_loop)]
for k in 0..buf.len() {
if section.does_flag_contains_key(FlagValue::ShfWrite) {
// flag WA, on doit allouer des données initialisés à 0
// généralement, ce signifie que le compilateur à ajouter une section .bss
buf[k] = 0;
} else {
buf[k] = self.bytes.get(section.image_offset as usize + j + k).copied().ok_or(LoaderError::ParsingError(format!("index 0x{:x} is out of bound because list have a size of 0x{:x} (image offset 0x{:x}, j 0x{:x}, k 0x{:x})", section.image_offset as usize + j + k, self.bytes.len(), section.image_offset, j, k)))?;
}
}
machine.write_memory(4, start_index + section.virt_addr as usize + j, u32::from_le_bytes(buf) as u64);
}
}
}
Ok(start_index as u64 + end_index + 4)
}
/// Load the binary file and store it inside an array and try to parse it,
/// useful for a lot of thing like to know which sections to allocate memory and where
fn load_and_parse(path: &str) -> Result<Self, LoaderError> {
let file = fs::File::open(path);
match file {
Ok(mut file) => {
let mut instructions: Vec<u8> = Default::default();
loop {
let mut buf: [u8; 1] = [0; 1];
let res = file.read(&mut buf);
match res {
Ok(res) => {
if res == 0 {
break; // eof
} else {
instructions.push(buf[0]);
}
},
Err(err) => {
return Err(LoaderError::IOError(err))
}
}
}
let elf_header = match ElfHeader::try_from(&instructions) {
Ok(header) => {
header
},
Err(err) => {
return Err(LoaderError::ParsingError(format!("Cannot parse elf header : {}", err)));
}
};
let section_header = match Self::parse_section_header(&instructions, elf_header.is_32bits, elf_header.section_header_location, elf_header.section_header_entries, elf_header.section_header_size) {
Ok(header) => {
header
},
Err(_) => {
return Err(LoaderError::ParsingError("Cannot parse section header".to_string()));
}
};
// #[cfg(debug_assertions)]
// println!("{:04x?}", instructions); // only print loaded program in debug build
Ok(Self { bytes: instructions, elf_header, sections: section_header })
},
Err(err) => {
Err(LoaderError::IOError(err))
}
}
}
/// Try to parse sections header table
///
/// Create one instance of [`SectionHeader`] for each entry and store it inside an array
///
/// ## Parameters
///
/// **instructions**: array of bytes of the binary file
/// **is_32bits**: contain whether the binary file is 32 bits or 64 bits
/// **header_location**: represent the position of the first entry of the header
/// **num_of_entries**: defines the number of section header entries
/// **entry_size**: Defines the size of an entry (each entry have the exact same size), value vary depending of if this binary file is 32 or 64 bits
fn parse_section_header(instructions: &[u8], is_32bits: bool, header_location: u64, num_of_entries: u16, entry_size: u16) -> Result<Vec<SectionHeader>, ()> {
let mut sections: Vec<SectionHeader> = Default::default();
for i in 0..num_of_entries as u64 {
sections.push(Self::parse_section_entry(instructions, is_32bits, header_location + i * entry_size as u64)?);
}
Ok(sections)
}
/// Parse one entry of the section header
///
/// ## Parameters:
///
/// **instructions**: array of bytes of the binary file
/// **is_32bits**: contain whether the binary file is 32 bits or 64 bits
/// **location**: represent the position of the entry on the file image
fn parse_section_entry(instructions: &[u8], is_32bits: bool, location: u64) -> Result<SectionHeader, ()> {
SectionHeader::try_from((instructions, location, is_32bits))
}
}
/// return the memory address of something stored at address
/// Can return None if the file is smaller than adress + 3 (or 7 if 64 bits), in this case, the elf header is incorrect
fn get_address_point(instructions: &[u8], address: usize, is_32bits: bool) -> Option<u64> {
if is_32bits {
let mut bytes: [u8; 4] = [0; 4];
bytes[0] = instructions.get(address).copied()?;
bytes[1] = instructions.get(address + 1).copied()?;
bytes[2] = instructions.get(address + 2).copied()?;
bytes[3] = instructions.get(address + 3).copied()?;
Option::Some(u32::from_le_bytes(bytes) as u64)
} else {
let mut bytes: [u8; 8] = [0; 8];
bytes[0] = instructions.get(address).copied()?;
bytes[1] = instructions.get(address + 1).copied()?;
bytes[2] = instructions.get(address + 2).copied()?;
bytes[3] = instructions.get(address + 3).copied()?;
bytes[4] = instructions.get(address + 4).copied()?;
bytes[5] = instructions.get(address + 5).copied()?;
bytes[6] = instructions.get(address + 6).copied()?;
bytes[7] = instructions.get(address + 7).copied()?;
Option::Some(u64::from_le_bytes(bytes))
}
}
/// Tests has been made for C program compiled with RISC-V GCC 12.2.0, target: riscv64-unknown-elf
///
/// It may not pass in the future if future gcc version modify order of the binary or something else
#[cfg(test)]
mod test {
use crate::{simulator::{loader::{Loader, SectionHeader}, machine::Machine}, utility::cfg::get_debug_configuration};
#[test]
fn test_parse_elf() {
let mut machine = Machine::new(true, get_debug_configuration());
let loader = Loader::load_and_parse("./target/guac/unsigned_addition.guac").expect("IO Error");
loader.load_into_machine(&mut machine, 0).expect("Parsing error");
assert!(!loader.elf_header.is_32bits);
assert!(!loader.elf_header.endianess);
assert!(loader.elf_header.sys_v_abi);
assert!(loader.elf_header.is_riscv_target);
assert_eq!(1, loader.elf_header.version);
assert_eq!(0x4000, loader.elf_header.entrypoint);
assert_eq!(64, loader.elf_header.elf_header_size);
assert_eq!(64, loader.elf_header.program_header_location);
assert_eq!(18992, loader.elf_header.section_header_location);
assert_eq!(56, loader.elf_header.program_header_size);
assert_eq!(64, loader.elf_header.section_header_size);
assert_eq!(4, loader.elf_header.program_header_entries);
assert_eq!(9, loader.elf_header.section_header_entries);
println!("{:#x?}", loader.sections);
}
#[test]
fn test_parse_section() {
let mut machine = Machine::new(true, get_debug_configuration());
let loader = Loader::load_and_parse("./target/guac/unsigned_addition.guac").expect("IO Error");
loader.load_into_machine(&mut machine, 0).expect("Parsing error");
assert_eq!(9, loader.sections.len());
let n = loader.sections.iter().filter(|p| { p.does_flag_contains_key(crate::simulator::loader::FlagValue::ShfAlloc)}).collect::<Vec<&SectionHeader>>().len();
assert_eq!(3, n);
assert_eq!(loader.sections[1].virt_addr, 0x4000);
assert_eq!(loader.sections[1].image_offset, 0x1000);
assert!(loader.sections[1].does_flag_contains_key(crate::simulator::loader::FlagValue::ShfAlloc));
assert_eq!(loader.sections[2].virt_addr, 0x400_000);
assert_eq!(loader.sections[2].image_offset, 0x2000);
assert!(loader.sections[2].does_flag_contains_key(crate::simulator::loader::FlagValue::ShfAlloc));
}
} }

1105
src/simulator/machine.rs
View File

File diff suppressed because it is too large Load Diff

266
src/simulator/mem_cmp.rs
View File

@ -1,88 +1,69 @@
use std::fs; ///! FILE.TXT FORMAT Representing machine memory memory
use std::io::BufRead; /// - PC
use std::io::BufReader; /// - SP
use std::io::Lines; /// - Section_1
/// - Section_2
/// - ...
/// - Section_n
///
/// Each section is divided in 3 parts, on two lines of text
/// addr SPACE len
/// content
use std::{fs, io::{BufRead, BufReader, Lines, Error}};
use crate::Machine; use crate::Machine;
const MEM_SIZE : usize = 4096; /// File section
/* TRUCS MANQUANTS
* Verifier qu'il y a un nombre pair de caractere hexa dans la ligne correspondante d'une section du fichier source
* Sinon on ne peut pas automatiquement remplir chaque octect car 2 hexa = 1 octet
*/
/* FORMAT FICHIER.TXT Représentant la mémoire apres éxecution d'un prog
* PC
* SP
* Section_1
* Section_2
* ...
* ...
* Section_n
*/
/* Chaque section se divise en 3 parties, sur 2 lignes de texte
* addr ESPACE len
* content
*/
//content est une suite hexadécimale
//Section dans le fichier, champ String car informations proviennent d'un fichier txt
pub struct SectionFormat{ pub struct SectionFormat{
/// Memory address of the section
addr: String, addr: String,
/// The size of data in bytes
len: String, len: String,
/// The data itself in Hexadecimal format
content: String, content: String,
} }
//Section dans le programme /// # Memory section
///
/// Representation of a section of memory from BurritOS or NachOS
pub struct Section{ pub struct Section{
addr: usize, // adresse dans la mémoire /// Memory address of the section
len: usize, // nombre d'octets de la donnée à addr addr: usize,
content: Vec<u8>, // la donnée en question /// The size of data in bytes
len: usize,
/// The data itself in Hexadecimal format
content: Vec<u8>
} }
/* impl Section {
* Voir si instanciation d'une structure deplace les valeurs "locales" à la méthode from, je sais plus ....
*/
impl Section{
/// Creates a memory section from a SectionFormat
fn from(section: &SectionFormat) -> Section { fn from(section: &SectionFormat) -> Section {
let addr = usize::from_str_radix(&section.addr, 16).unwrap_or_default();
let mut content: Vec<u8> = Vec::new(); let len = usize::from_str_radix(&section.len, 16).unwrap_or_default();
let addr: usize = string_hex_to_usize(&section.addr); let content: Vec<u8> = section.content.as_bytes().chunks(2).map(|x| {
let len: usize = string_hex_to_usize(&section.len); u8::from_str_radix(std::str::from_utf8(x).unwrap_or_default(), 16).unwrap_or_default()
}).collect();
let mut tmp_a: char = ' ';
for (i, c) in section.content.chars().enumerate(){
if i%2 == 0 {
tmp_a = c;
}
else {
content.push(two_hex_to_u8(tmp_a,c));
}
}
Section{addr, len, content} Section{addr, len, content}
} }
/// Pretty prints a memory section
fn print_section(s: &Section){ fn print_section(s: &Section){
println!("ADDR :: {:x}", s.addr); println!("ADDR :: {:x}\nLEN :: {:x}\nCONTENT :: {:?}", s.addr, s.len, s.content);
println!("LEN :: {:x}", s.len);
println!("CONTENT :: {:?}", s.content);
} }
} }
/*
* Representation de l'etat de la mémoire (apres execution.... a confirmer), sous forme de sections /// # Representation of the state of machine memory
*/ ///
pub struct MemChecker{ /// Could represent memory at any point in time, before, during, or after execution.
/// The memory is split into sections.
pub struct MemChecker {
/// Value of the program counter
pc: usize, pc: usize,
/// Value of the stack pointer
sp: usize, sp: usize,
/// Sections
sections: Vec<Section>, sections: Vec<Section>,
} }
@ -104,8 +85,8 @@ impl MemChecker{
vector.push(line.unwrap()); vector.push(line.unwrap());
} }
let size = vector.len(); let size = vector.len();
*pc = string_hex_to_usize(vector.get(size - 2).expect("0")); *pc = usize::from_str_radix(vector.get(size - 2).expect("0"), 16).unwrap_or_default();
*sp = string_hex_to_usize(vector.get(size - 1).expect("0")); *sp = usize::from_str_radix(vector.get(size - 1).expect("0"), 16).unwrap_or_default();
vector vector
} }
@ -117,9 +98,9 @@ impl MemChecker{
/// ///
/// ### Return /// ### Return
/// Mem-checker filled /// Mem-checker filled
pub fn from(path: &String) -> MemChecker { pub fn from(path: &str) -> Result<MemChecker, Error> {
let file = fs::File::open(path).expect("Wrong filename"); let file = fs::File::open(path)?;
let reader = BufReader::new(file); let reader = BufReader::new(file);
let mut lines = reader.lines(); let mut lines = reader.lines();
@ -155,7 +136,7 @@ impl MemChecker{
} }
MemChecker{pc, sp, sections} Ok(MemChecker{pc, sp, sections})
} }
@ -187,9 +168,7 @@ impl MemChecker{
machine.int_reg.set_reg(2, m_c.sp as i64); machine.int_reg.set_reg(2, m_c.sp as i64);
machine.pc = m_c.pc as u64; machine.pc = m_c.pc as u64;
for section in m_c.sections.iter() { for section in m_c.sections.iter() {
for (i,b) in section.content.iter().enumerate() { for (i,b) in section.content.iter().enumerate() {
machine.main_memory[section.addr + i] = *b; machine.main_memory[section.addr + i] = *b;
} }
@ -197,20 +176,13 @@ impl MemChecker{
} }
/* /// For debug
* FOR DEBUG
*/
fn compare_print_m_c_machine(m_c: &MemChecker, machine: &mut Machine){ fn compare_print_m_c_machine(m_c: &MemChecker, machine: &mut Machine){
MemChecker::print_mem_checker(m_c); MemChecker::print_mem_checker(m_c);
for section in m_c.sections.iter() { for section in m_c.sections.iter() {
print!("\n\n"); print!("\n\n");
println!("Content addr : {}", section.addr); println!("Content addr : {}", section.addr);
println!("Content len (number of bytes) : {}", section.len); println!("Content len (number of bytes) : {}", section.len);
for i in 0..section.len { for i in 0..section.len {
println!("mem[{}] = {}", section.addr + i, machine.main_memory[section.addr + i]); println!("mem[{}] = {}", section.addr + i, machine.main_memory[section.addr + i]);
} }
@ -232,94 +204,18 @@ impl MemChecker{
} }
fn string_hex_to_usize(s: &String) -> usize {
if s.is_empty() {
return 0;
}
let max_pow = (s.len()-1) as u32;
let mut ret_value: usize = 0;
let base: usize = 16;
for (i,c )in s.chars().enumerate(){
//println!("Current char :: {} :: Current pow :: {} ::", c, max_pow - (i as u32));
let tmp: usize = one_hex_to_dec(c) as usize;
ret_value += base.pow(max_pow - (i as u32))*tmp;
}
ret_value
}
/*
* c doit etre un caractère hexadécimale
*/
fn one_hex_to_dec(c: char) -> u8 {
match c {
'A' | 'a' => 10,
'B' | 'b' => 11,
'C' | 'c' => 12,
'D' | 'd' => 13,
'E' | 'e' => 14,
'F' | 'f' => 15,
_ => {
c.to_digit(10).unwrap() as u8
},
}
}
fn two_hex_to_u8(c1: char, c2: char) -> u8 {
let a = one_hex_to_dec(c1);
let b = one_hex_to_dec(c2);
16*a + b
}
/*
* Juste pour voir si via BufReader les \n sont présent, apres test il s'avère que non
* De toute facon on limitera d'une section la lecture par len
*/
fn test_show_sections_file(){
let file = fs::File::open("test_file_section.txt").expect("Wrong filename");
let reader = BufReader::new(file);
for line in reader.lines() {
//println!("Tailles de la ligne : {}",
let current = line.unwrap();
//println!("Taille de la ligne : {}", current.len()); // En effet pas de \n dans chaque line, parfait
println!("{}", &current);
}
}
#[cfg(test)] #[cfg(test)]
mod tests { mod tests {
use crate::utility::cfg::get_debug_configuration;
use super::*; use super::*;
#[test] #[test]
fn test_fill_memory(){ fn test_fill_memory(){
let path = "osef".to_string(); let m_c = MemChecker::from("test/machine/memoryAdd.txt").unwrap();
let m_c = MemChecker::from(&path); let mut machine = Machine::new(true, get_debug_configuration());
let mut machine = Machine::_init_machine();
MemChecker::fill_memory_from_mem_checker(&m_c, &mut machine); MemChecker::fill_memory_from_mem_checker(&m_c, &mut machine);
print!("\n Comparing memory from loaded context\n\n");
MemChecker::compare_print_m_c_machine(&m_c, &mut machine); MemChecker::compare_print_m_c_machine(&m_c, &mut machine);
} }
#[test] #[test]
@ -333,28 +229,10 @@ mod tests {
#[test] #[test]
fn test_create_mem_checker(){ fn test_create_mem_checker(){
let path: String = "osef".to_string(); let m_c = MemChecker::from("test/machine/memoryAdd.txt").unwrap();
let m_c = MemChecker::from(&path);
MemChecker::print_mem_checker(&m_c); MemChecker::print_mem_checker(&m_c);
} }
#[test]
fn test_string_hex_to_usize(){
let s = String::from("AE1F20");
//println!("taille de string : {}", s.len());
let expected: usize = 11411232;
let result = string_hex_to_usize(&s);
assert_eq!(expected,result);
}
#[test]
fn tmp_fct_read_file(){
println!("Reading A file \n");
test_show_sections_file();
}
#[test] #[test]
fn test_create_section_content(){ fn test_create_section_content(){
let section_format = SectionFormat{ let section_format = SectionFormat{
@ -362,43 +240,9 @@ mod tests {
len: "0".to_string(), len: "0".to_string(),
content: "00FF0AA0A5".to_string(), content: "00FF0AA0A5".to_string(),
}; };
let section = Section::from(&section_format); let section = Section::from(&section_format);
let expected_vec: Vec<u8> = vec![0u8, 255u8, 10u8, 160u8, 165u8]; let expected_vec: Vec<u8> = vec![0u8, 255u8, 10u8, 160u8, 165u8];
//println!("Vec from created section {:?}", &section.content);
//println!("Expected vec {:?}", &expected_vec);
assert_eq!(section.content, expected_vec); assert_eq!(section.content, expected_vec);
} }
#[test]
fn test_hex_1(){
let b = two_hex_to_u8('0', '0');
assert_eq!(0u8, b);
}
#[test]
fn test_hex_2(){
let b = two_hex_to_u8('F', 'F');
assert_eq!(255u8, b);
}
#[test]
fn test_hex_3(){
let b = two_hex_to_u8('0', 'A');
assert_eq!(10u8, b);
}
#[test]
fn test_hex_4(){
let b = two_hex_to_u8('A', '0');
assert_eq!(160u8, b);
}
#[test]
fn test_hex_5(){
let b = two_hex_to_u8('A', '5');
assert_eq!(165u8, b);
}
} }

159
src/simulator/mmu.rs Normal file
View File

@ -0,0 +1,159 @@
use crate::simulator::translationtable::*;
use crate::simulator::machine::*;
pub struct MMU <'a>{
/* Un MMU possède une seule référence vers une table des pages à un instant donné
* Cette table est associée au processus courant
* Cette référence peut etre mise a jour par exemple lors d'un switchTo
*/
translationTable : Option<&'a mut TranslationTable>,
numPhyPages : u64,
pageSize : u64
}
impl <'a>MMU <'_>{
fn create(numPhyPages: u64, pageSize: u64) -> MMU <'a>{
MMU {
translationTable : None,
numPhyPages,
pageSize
}
}
pub fn mmu_read_mem(mmu : &mut MMU, machine : &mut Machine, virt_addr : u64, value : &mut u64, size : i32) -> bool {
//Pour plus tard eventuellement considerer le boutisme de notre mémoire
//Peut etre pas si on fixe cela en BIG ENDIAN (octects poids fort au debut)
let mut phy_addr : u64 = 0;
let mut phy_addr_double_check : u64 = 0;
let exc = MMU::translate(mmu, virt_addr, &mut phy_addr, false);
MMU::translate(mmu, virt_addr, &mut phy_addr_double_check, false);
match exc {
ExceptionType::NoException => {
if phy_addr != phy_addr_double_check {
//Besoin ici d'une impl pour gestion d'exeption
//dans nachos : g-machine->RaiseException(exc, virt_addr);
println!("Error from mmu_read_mem :: phy_addr != phy_addr_double_check");
return false;
}
else {
*value = Machine::read_memory(machine, size, phy_addr as usize);
return true;
}
}
_ => {
//Besoin ici d'une impl pour gestion d'exeption
//dans nachos : g-machine->RaiseException(exc, virt_addr);
println!("Error from mmu_read_mem :: Exception different from NoException");
return false;
}
}
true
}
pub fn mmu_write_mem(mmu : &mut MMU, machine : &mut Machine, virt_addr : u64, value : u64, size : i32) -> bool {
//Pour plus tard eventuellement considerer le boutisme de notre mémoire
//Peut etre pas si on fixe cela en BIG ENDIAN (octects poids fort au debut)
let mut phy_addr : u64 = 0;
let mut phy_addr_double_check : u64 = 0;
let exc = MMU::translate(mmu, virt_addr, &mut phy_addr, true);
MMU::translate(mmu, virt_addr, &mut phy_addr_double_check, true);
match exc {
ExceptionType::NoException => {
if phy_addr != phy_addr_double_check {
//Besoin ici d'une impl pour gestion d'exeption
//dans nachos : g-machine->RaiseException(exc, virt_addr);
println!("Error from mmu_write_mem :: phy_addr != phy_addr_double_check");
return false;
}
else {
Machine::write_memory(machine, size, phy_addr as usize, value);
return true;
}
}
_ => {
//Besoin ici d'une impl pour gestion d'exeption
//dans nachos : g-machine->RaiseException(exc, virt_addr);
println!("Error from mmu_write_mem :: Exception different from NoException");
return false;
}
}
true
}
pub fn translate(mmu : &mut MMU, virtAddr : u64, physAddr : &mut u64, writing : bool) -> ExceptionType {
let vpn : u64 = virtAddr/(mmu.pageSize); //virtual page index
let offset : u64 = virtAddr%(mmu.pageSize); //adresse intra page
match &mut mmu.translationTable {
None => {
println!("Error from translate : MMU refers to None (No page Table)");
return ExceptionType::AddressErrorException;
}
Some(table_ref) => {
//On verifie que notre index est valide
if vpn >= table_ref.get_max_num_pages(){
println!("Error from translate :: index is out of bound");
return ExceptionType::AddressErrorException;
}
/*Doc nachos dit que ce test sert a savoir si la page est mappée
*On teste les droit de lecture ecriture sur cette page
*A confirmer avc isabelle
*/
if !table_ref.get_bit_read(vpn) && !table_ref.get_bit_write(vpn) {
println!("Error from translate :: virtual page # {} not mapped",vpn);
return ExceptionType::AddressErrorException;
}
//si on souhaite effectuer un acces lecture, on verifie que l'on dispose du droit d'acces sur cette page
if writing && !table_ref.get_bit_write(vpn) {
println!("Error from translate :: write access on a read only virtual page # {}",vpn);
return ExceptionType::AddressErrorException;
}
//if the page is not yet in main memory, run the page fault manager
//Page manager not implemented yet
if !table_ref.get_bit_valid(vpn){
println!("Error from translate :: no valid correspondance");
println!("We need to update the page table by raising an exception -> not implemented");
//Ici il faudra reverifier le bit valid apres intervention du page fault manager
return ExceptionType::AddressErrorException;
}
//Make sure that the physical adress is correct
if table_ref.get_physical_page(vpn) < 0 || table_ref.get_physical_page(vpn) >= (mmu.numPhyPages as i32) {
println!("Error from translate :: no valid correspondance");
return ExceptionType::BusErrorException;
}
//Set U/M bits to 1
if writing {
table_ref.set_bit_M(vpn);
}
table_ref.set_bit_U(vpn);
//on se permet ici la conversion du champs physical_page de i32 vers u64
//si cette valeur avait été signée, cela aurait été detecté juste au dessus, renvoyant une BUSERROR_EXCEPTION
*physAddr = (table_ref.get_physical_page(vpn) as u64)*(mmu.pageSize) + offset;
}
}
ExceptionType::NoException
}
}

17
src/simulator/mod.rs
View File

@ -1,9 +1,14 @@
pub mod machine; pub mod machine;
pub mod decode; pub mod error;
pub mod print; pub mod instruction;
pub mod mem_cmp; pub mod mem_cmp;
pub mod loader; pub mod loader;
pub mod interrupt;
pub mod translationtable;
pub mod mmu;
pub mod register;
/// Definition of global constants
pub mod global { pub mod global {
#![allow(dead_code)] #![allow(dead_code)]
@ -49,15 +54,15 @@ pub mod global {
/// ///
/// See func3 to know the type of instruction (LD, LW, LH, LB, LWU, LHU, LBU) /// See func3 to know the type of instruction (LD, LW, LH, LB, LWU, LHU, LBU)
pub const RISCV_LD: u8 = 0x3; pub const RISCV_LD: u8 = 0x3;
// Store instructions /// Store instructions
pub const RISCV_ST: u8 = 0x23; pub const RISCV_ST: u8 = 0x23;
// immediate Arithmetic operations /// immediate Arithmetic operations
pub const RISCV_OPI: u8 = 0x13; pub const RISCV_OPI: u8 = 0x13;
// Arithmetic operations /// Arithmetic operations
pub const RISCV_OP: u8 = 0x33; pub const RISCV_OP: u8 = 0x33;
/// Immediate arithmetic operations for rv64i /// Immediate arithmetic operations for rv64i
pub const RISCV_OPIW: u8 = 0x1b; pub const RISCV_OPIW: u8 = 0x1b;
// Arithmetic operations for rv64i /// Arithmetic operations for rv64i
pub const RISCV_OPW: u8 = 0x3b; pub const RISCV_OPW: u8 = 0x3b;
/// Type: B /// Type: B

414
src/simulator/print.rs
View File

@ -1,414 +0,0 @@
#![allow(dead_code)]
use super::decode::{Instruction};
use super::global::*;
const NAMES_OP: [&str; 8] = ["add", "sll", "slt", "sltu", "xor", "sr", "or", "and"];
const NAMES_OPI: [&str; 8] = ["addi", "slli", "slti", "sltiu", "xori", "slri", "ori", "andi"];
const NAMES_MUL: [&str; 8] = ["mul", "mulh", "mulhsu", "mulhu", "div", "divu", "rem", "remu"];
const NAMES_BR: [&str; 8] = ["beq", "bne", "", "", "blt", "bge", "bltu", "bgeu"];
const NAMES_ST: [&str; 4] = ["sb", "sh", "sw", "sd"];
const NAMES_LD: [&str; 7] = ["lb", "lh", "lw", "ld", "lbu", "lhu", "lwu"];
const NAMES_OPW: [&str; 8] = ["addw", "sllw", "", "", "", "srw", "", ""];
const NAMES_OPIW: [&str; 8] = ["addiw", "slliw", "", "", "", "sri", "", ""];
// Register name mapping
pub const REG_X: [&str; 32] = ["zero", "ra", "sp", "gp", "tp", "t0", "t1", "t2", "s0", "s1",
"a0", "a1", "a2", "a3", "a4", "a5", "a6", "a7",
"s2", "s3", "s4", "s5", "s6", "s7", "s8", "s9", "s10", "s11",
"t3", "t4", "t5", "t6"];
const REG_F: [&str; 32] = ["ft0", "ft1", "ft2", "ft3", "ft4", "ft5", "ft6", "ft7", "fs0", "fs1",
"fa0", "fa1", "fa2", "fa3", "fa4", "fa5", "fa6", "fa7",
"fs2", "fs3", "fs4", "fs5", "fs6", "fs7", "fs8", "fs9", "fs10", "fs11",
"ft8", "ft9", "ft10", "ft11"];
pub fn print(ins: Instruction, pc: i32) -> String { //TODO pc should be u64
let rd = ins.rd as usize;
let rs1 = ins.rs1 as usize;
let rs2 = ins.rs2 as usize;
let rs3 = ins.rs3 as usize;
match ins.opcode {
RISCV_OP => {
let name: &str;
if ins.funct7 == 1 { // Use mul array
name = NAMES_MUL[ins.funct3 as usize]
} else if ins.funct3 == RISCV_OP_ADD {
// Add or Sub
if ins.funct7 == RISCV_OP_ADD_ADD {
name = "add";
} else {
name = "sub";
}
} else if ins.funct3 == RISCV_OP_SR {
// Srl or Sra
if ins.funct7 == RISCV_OP_SR_SRL {
name = "srl";
} else {
name = "sra";
}
} else {
name = NAMES_OP[ins.funct3 as usize];
}
format!("{}\t{},{},{}", name, REG_X[rd], REG_X[rs1], REG_X[rs2])
},
RISCV_OPI => {
// SHAMT OR IMM
if ins.funct3 == RISCV_OPI_SRI {
if ins.funct7 == RISCV_OPI_SRI_SRLI {
format!("srli\t{},{},{}", REG_X[rd], REG_X[rs1], ins.shamt)
} else {
format!("srai\t{},{},{}", REG_X[rd], REG_X[rs1], ins.shamt)
}
} else if ins.funct3 == RISCV_OPI_SLLI {
format!("{}\t{},{},{}", NAMES_OPI[ins.funct3 as usize], REG_X[rd], REG_X[rs1], ins.shamt)
} else {
format!("{}\t{},{},{}", NAMES_OPI[ins.funct3 as usize], REG_X[rd], REG_X[rs1], ins.imm12_I_signed)
}
},
RISCV_LUI => {
format!("lui\t{},{:x}", REG_X[rd], ins.imm31_12)
},
RISCV_AUIPC => {
format!("auipc\t{},{:x}", REG_X[rd], ins.imm31_12)
},
RISCV_JAL => {
format!("jal\t{},{:x}", REG_X[rd], (pc + ins.imm21_1_signed))
},
RISCV_JALR => {
format!("jalr\t{},{:x}({})", REG_X[rd], ins.imm12_I_signed, REG_X[rs1])
},
RISCV_BR => {
format!("{}\t{},{},{:x}", NAMES_BR[ins.funct3 as usize], REG_X[rs1], REG_X[rs2], pc + (ins.imm13_signed as i32))
},
RISCV_LD => {
format!("{}\t{},{}({})", NAMES_LD[ins.funct3 as usize], REG_X[rd], ins.imm12_I_signed, REG_X[rs1])
},
RISCV_ST => {
format!("{}\t{},{}({})", NAMES_ST[ins.funct3 as usize], REG_X[rs2], ins.imm12_S_signed, REG_X[rs1])
},
RISCV_OPIW => {
if ins.funct3 == RISCV_OPIW_SRW {
if ins.funct7 == RISCV_OPIW_SRW_SRLIW {
format!("srliw\t{},{},{}", REG_X[rd], REG_X[rs1], REG_X[rs2])
} else {
format!("sraiw\t{},{},{}", REG_X[rd], REG_X[rs1], REG_X[rs2])
}
} else {
format!("{}\t{},{},0x{:x}", NAMES_OPIW[ins.funct3 as usize], REG_X[rd], REG_X[rs1], ins.imm12_I_signed)
}
},
RISCV_OPW => {
if ins.funct7 == 1 {
format!("{}w\t{},{},{}", NAMES_MUL[ins.funct3 as usize], REG_X[rd], REG_X[rs1], REG_X[rs2])
} else if ins.funct3 == RISCV_OP_ADD {
if ins.funct7 == RISCV_OPW_ADDSUBW_ADDW {
format!("addw\t{},{},{}", REG_X[rd], REG_X[rs1], REG_X[rs2])
} else {
format!("subw\t{},{},{}", REG_X[rd], REG_X[rs1], REG_X[rs2])
}
} else if ins.funct3 == RISCV_OPW_SRW {
if ins.funct7 == RISCV_OPW_SRW_SRLW {
format!("srlw\t{},{},{}", REG_X[rd], REG_X[rs1], REG_X[rs2])
} else {
format!("sraw\t{},{},{}", REG_X[rd], REG_X[rs1], REG_X[rs2])
}
} else {
format!("{}\t{},{},{}", NAMES_OPW[ins.funct3 as usize], REG_X[rd], REG_X[rs1], REG_X[rs2])
}
},
// RV32F Standard Extension
RISCV_FLW => {
format!("flw\t{},{},({})", REG_F[rd], ins.imm12_I_signed, REG_F[rs1])
},
RISCV_FSW => {
format!("fsw\t{},{},({})", REG_F[rs2], "OFFSET TODO", REG_F[rs1]) // TODO Offset in decode
},
RISCV_FMADD => {
format!("fmadd\t{}{}{}{}", REG_F[rd], REG_F[rs1], REG_F[rs2], REG_F[rs3])
},
RISCV_FMSUB => {
format!("fmsub\t{}{}{}{}", REG_F[rd], REG_F[rs1], REG_F[rs2], REG_F[rs3])
},
RISCV_FNMSUB => {
format!("fnmsub\t{}{}{}{}", REG_F[rd], REG_F[rs1], REG_F[rs2], REG_F[rs3])
},
RISCV_FNMADD => {
format!("fnmadd\t{}{}{}{}", REG_F[rd], REG_F[rs1], REG_F[rs2], REG_F[rs3])
},
RISCV_FP => {
match ins.funct7 {
RISCV_FP_ADD => {
format!("{}\t{}{}{}", "fadd", REG_F[rd], REG_F[rs1], REG_F[rs2])
},
RISCV_FP_SUB => {
format!("{}\t{}{}{}", "fsub.s", REG_F[rd], REG_F[rs1], REG_F[rs2])
},
RISCV_FP_MUL => {
format!("{}\t{}{}{}", "fmul.s", REG_F[rd], REG_F[rs1], REG_F[rs2])
},
RISCV_FP_DIV => {
format!("{}\t{}{}{}", "fdiv.s", REG_F[rd], REG_F[rs1], REG_F[rs2])
},
RISCV_FP_SQRT => {
format!("{}\t{}{}", "fsqrt.s", REG_F[rd], REG_F[rs1])
},
RISCV_FP_FSGN => {
match ins.funct3 {
RISCV_FP_FSGN_J => {
format!("{}\t{}{}{}", "fsgnj.s", REG_F[rd], REG_F[rs1], REG_F[rs2])
},
RISCV_FP_FSGN_JN => {
format!("{}\t{}{}{}", "fsgnn.s", REG_F[rd], REG_F[rs1], REG_F[rs2])
},
RISCV_FP_FSGN_JX => {
format!("{}\t{}{}{}", "fsgnx.s", REG_F[rd], REG_F[rs1], REG_F[rs2])
},
_ => todo!("Unknown code")
}
},
RISCV_FP_MINMAX => {
if ins.funct3 == 0 {
format!("{}\t{}{}{}", "fmin.s", REG_F[rd], REG_F[rs1], REG_F[rs2])
} else {
format!("{}\t{}{}{}", "fmax.s", REG_F[rd], REG_F[rs1], REG_F[rs2])
}
},
RISCV_FP_FCVTW => {
if rs2 == 0 {
format!("{}\t{}{}", "fcvt.w.s", REG_F[rd], REG_F[rs1])
} else {
format!("{}\t{}{}", "fcvt.wu.s", REG_F[rd], REG_F[rs1])
}
},
RISCV_FP_FMVXFCLASS => {
if ins.funct3 == 0 {
format!("{}\t{}{}", "fmv.x.w", REG_F[rd], REG_F[rs1])
} else {
format!("{}\t{}{}", "fclass.s", REG_F[rd], REG_F[rs1])
}
},
RISCV_FP_FCMP => {
if ins.funct3 == 0 {
format!("{}\t{}{}{}", "fle.s", REG_F[rd], REG_F[rs1], REG_F[rs2])
} else if ins.funct3 == 1 {
format!("{}\t{}{}{}", "flt.s", REG_F[rd], REG_F[rs1], REG_F[rs2])
} else {
format!("{}\t{}{}{}", "feq.s", REG_F[rd], REG_F[rs1], REG_F[rs2])
}
},
RISCV_FP_FCVTS => {
if rs2 == 0 {
format!("{}\t{}{}", "fcvt.s.w", REG_F[rd], REG_F[rs1])
} else {
format!("{}\t{}{}", "fcvt.s.wu", REG_F[rd], REG_F[rs1])
}
},
RISCV_FP_FMVW => {
format!("{}\t{}{}", "fmv.w.x", REG_F[rd], REG_F[rs1])
},
_ => todo!("Unknown code")
}
},
RISCV_SYSTEM => {
"ecall".to_string()
},
_ => todo!("{:x} opcode non géré pc : {:x}, value : {:x}", ins.opcode, pc, ins.value) // Change todo! to panic! in the future, I put todo! because there's a lot of opcode currently not implemented
}
}
#[cfg(test)]
mod test {
#![allow(clippy::unusual_byte_groupings)]
use crate::simulator::{decode, print};
#[test]
fn test_op() {
let sub = decode::decode(0b0100000_10000_10001_000_11100_0110011);
let add = decode::decode(0b0000000_10000_10001_000_11100_0110011);
let xor = decode::decode(0b0000000_10000_10001_100_11100_0110011);
let slr = decode::decode(0b0000000_10000_10001_101_11100_0110011);
let sra = decode::decode(0b0100000_10000_10001_101_11100_0110011);
assert_eq!("sub\tt3,a7,a6", print::print(sub, 0));
assert_eq!("xor\tt3,a7,a6", print::print(xor, 0));
assert_eq!("srl\tt3,a7,a6", print::print(slr, 0));
assert_eq!("sra\tt3,a7,a6", print::print(sra, 0));
assert_eq!("add\tt3,a7,a6", print::print(add, 0));
}
#[test]
fn test_opi() {
let addi = decode::decode(0b0000000000_10001_000_11100_0010011);
let slli = decode::decode(0b0000000000_10001_001_11100_0010011);
let slti = decode::decode(0b0000000000_10001_010_11100_0010011);
let sltiu = decode::decode(0b0000000000_10001_011_11100_0010011);
let xori = decode::decode(0b_0000000000010001_100_11100_0010011);
let ori = decode::decode(0b00000000000_10001_110_11100_0010011);
let andi = decode::decode(0b000000000000_10001_111_11100_0010011);
assert_eq!("andi\tt3,a7,0", print::print(andi, 0));
assert_eq!("addi\tt3,a7,0", print::print(addi, 0));
assert_eq!("slli\tt3,a7,0", print::print(slli, 0));
assert_eq!("slti\tt3,a7,0", print::print(slti, 0));
assert_eq!("sltiu\tt3,a7,0", print::print(sltiu, 0));
assert_eq!("xori\tt3,a7,0", print::print(xori, 0));
assert_eq!("ori\tt3,a7,0", print::print(ori, 0));
}
#[test]
fn test_lui() {
let lui = decode::decode(0b01110001000011111000_11100_0110111);
let lui_negatif = decode::decode(0b11110001000011111000_11100_0110111);
assert_eq!("lui\tt3,710f8000", print::print(lui, 0));
assert_eq!("lui\tt3,f10f8000", print::print(lui_negatif, 0));
}
#[test]
fn test_ld() {
// imm rs1 f3 rd opcode
let lb = decode::decode(0b010111110000_10001_000_11100_0000011);
let lh = decode::decode(0b010111110000_10001_001_11100_0000011);
let lw = decode::decode(0b010111110000_10001_010_11100_0000011);
let lbu = decode::decode(0b010111110000_10001_100_11100_0000011);
let lhu = decode::decode(0b010111110000_10001_101_11100_0000011);
let ld = decode::decode(0b010111110000_10001_011_11100_0000011);
let lwu = decode::decode(0b010111110000_10001_110_11100_0000011);
assert_eq!("lb\tt3,1520(a7)", print::print(lb, 0));
assert_eq!("lh\tt3,1520(a7)", print::print(lh, 0));
assert_eq!("lw\tt3,1520(a7)", print::print(lw, 0));
assert_eq!("lbu\tt3,1520(a7)", print::print(lbu, 0));
assert_eq!("lhu\tt3,1520(a7)", print::print(lhu, 0));
assert_eq!("ld\tt3,1520(a7)", print::print(ld, 0));
assert_eq!("lwu\tt3,1520(a7)", print::print(lwu, 0));
}
#[test]
fn test_opw() {
let addw: decode::Instruction = decode::decode(0b0000000_10000_10001_000_11100_0111011);
let sllw: decode::Instruction = decode::decode(0b0000000_10000_10001_001_11100_0111011);
let srlw: decode::Instruction = decode::decode(0b0000000_10000_10001_101_11100_0111011);
let sraw: decode::Instruction = decode::decode(0b0100000_10000_10001_101_11100_0111011);
assert_eq!("addw\tt3,a7,a6", print::print(addw, 0));
assert_eq!("sllw\tt3,a7,a6", print::print(sllw, 0));
assert_eq!("srlw\tt3,a7,a6", print::print(srlw, 0));
assert_eq!("sraw\tt3,a7,a6", print::print(sraw, 0));
}
#[test]
fn test_opwi() {
let addiw: decode::Instruction =decode::decode(0b000000000000_10001_000_11100_0011011);
let slliw: decode::Instruction = decode::decode(0b0000000_10000_10001_001_11100_0011011);
let srai: decode::Instruction = decode::decode(0b010000010001_10001_101_11100_0010011);
assert_eq!("addiw\tt3,a7,0x0", print::print(addiw, 0));
assert_eq!("slliw\tt3,a7,0x10", print::print(slliw, 0));
assert_eq!("srai\tt3,a7,17", print::print(srai, 0));
}
#[test]
fn test_br() {
let beq: decode::Instruction = decode::decode(0b0000000_10000_10001_000_00000_1100011);
let bne: decode::Instruction = decode::decode(0b0000000_10000_10001_001_00000_1100011);
let blt: decode::Instruction = decode::decode(0b0000000_10000_10001_100_00000_1100011);
let bge: decode::Instruction = decode::decode(0b0000000_10000_10001_101_00000_1100011);
let bge2: decode::Instruction = decode::decode(0x00f75863);
let bltu: decode::Instruction = decode::decode(0b0000000_10000_10001_110_00000_1100011);
let bgeu: decode::Instruction = decode::decode(0b0000000_10000_10001_111_00000_1100011);
assert_eq!("blt\ta7,a6,0", print::print(blt, 0));
assert_eq!("bge\ta7,a6,0", print::print(bge, 0));
assert_eq!("bge\ta4,a5,104d4", print::print(bge2, 0x104c4));
assert_eq!("bltu\ta7,a6,0", print::print(bltu, 0));
assert_eq!("bgeu\ta7,a6,0", print::print(bgeu, 0));
assert_eq!("bne\ta7,a6,0", print::print(bne, 0));
assert_eq!("beq\ta7,a6,0", print::print(beq, 0));
}
#[test]
fn test_small_program() {
/* Code for :
int a = 0;
int b = 5;
a = b;
a = a * b;
a = a + b;
b = a - b;
*/
assert_eq!("addi sp,sp,-32", print::print(decode::decode(0xfe010113), 0));
assert_eq!("sd s0,24(sp)", print::print(decode::decode(0x00813c23), 0));
assert_eq!("addi s0,sp,32", print::print(decode::decode(0x02010413), 0));
assert_eq!("sw zero,-20(s0)", print::print(decode::decode(0xfe042623), 0));
assert_eq!("addi a5,zero,5", print::print(decode::decode(0x00500793), 0));
assert_eq!("sw a5,-24(s0)", print::print(decode::decode(0xfef42423), 0));
assert_eq!("lw a5,-24(s0)", print::print(decode::decode(0xfe842783), 0));
assert_eq!("sw a5,-20(s0)", print::print(decode::decode(0xfef42623), 0));
assert_eq!("lw a5,-20(s0)", print::print(decode::decode(0xfec42783), 0));
assert_eq!("addi a4,a5,0", print::print(decode::decode(0x00078713), 0));
assert_eq!("lw a5,-24(s0)", print::print(decode::decode(0xfe842783), 0));
assert_eq!("mulw a5,a4,a5", print::print(decode::decode(0x02f707bb), 0));
assert_eq!("sw a5,-20(s0)", print::print(decode::decode(0xfef42623), 0));
assert_eq!("lw a5,-20(s0)", print::print(decode::decode(0xfec42783), 0));
assert_eq!("addi a4,a5,0", print::print(decode::decode(0x00078713), 0));
assert_eq!("lw a5,-24(s0)", print::print(decode::decode(0xfe842783), 0));
assert_eq!("addw a5,a4,a5", print::print(decode::decode(0x00f707bb), 0));
assert_eq!("sw a5,-20(s0)", print::print(decode::decode(0xfef42623), 0));
assert_eq!("lw a5,-20(s0)", print::print(decode::decode(0xfec42783), 0));
assert_eq!("addi a4,a5,0", print::print(decode::decode(0x00078713), 0));
assert_eq!("lw a5,-24(s0)", print::print(decode::decode(0xfe842783), 0));
assert_eq!("subw a5,a4,a5", print::print(decode::decode(0x40f707bb), 0));
assert_eq!("sw a5,-24(s0)", print::print(decode::decode(0xfef42423), 0));
assert_eq!("addi a5,zero,0", print::print(decode::decode(0x00000793), 0));
assert_eq!("addi a0,a5,0", print::print(decode::decode(0x00078513), 0));
assert_eq!("ld s0,24(sp)", print::print(decode::decode(0x01813403), 0));
assert_eq!("addi sp,sp,32", print::print(decode::decode(0x02010113), 0));
assert_eq!("jalr zero,0(ra)", print::print(decode::decode(0x00008067), 0));
}
#[test]
fn test_fibo() {
assert_eq!("jal zero,10504", print::print(decode::decode(0x0500006f), 0x104b4));
assert_eq!("blt a4,a5,104b8", print::print(decode::decode(0xfaf740e3), 0x10518));
}
#[test]
fn test_mul_prog() {
assert_eq!("addi sp,sp,-32", print::print(decode::decode(0xfe010113), 0));
assert_eq!("sd s0,24(sp)", print::print(decode::decode(0x00813c23), 0));
assert_eq!("addi s0,sp,32", print::print(decode::decode(0x02010413), 0));
assert_eq!("addi a5,zero,5", print::print(decode::decode(0x00500793), 0));
assert_eq!("sw a5,-20(s0)", print::print(decode::decode(0xfef42623), 0));
assert_eq!("lw a5,-20(s0)", print::print(decode::decode(0xfec42783), 0));
assert_eq!("addi a4,a5,0", print::print(decode::decode(0x00078713), 0));
assert_eq!("addi a5,a4,0", print::print(decode::decode(0x00070793), 0));
assert_eq!("slliw a5,a5,0x2", print::print(decode::decode(0x0027979b), 0));
assert_eq!("addw a5,a5,a4", print::print(decode::decode(0x00e787bb), 0));
assert_eq!("sw a5,-24(s0)", print::print(decode::decode(0xfef42423), 0));
assert_eq!("lw a5,-20(s0)", print::print(decode::decode(0xfec42783), 0));
assert_eq!("addi a4,a5,0", print::print(decode::decode(0x00078713), 0));
assert_eq!("lw a5,-24(s0)", print::print(decode::decode(0xfe842783), 0));
assert_eq!("mulw a5,a4,a5", print::print(decode::decode(0x02f707bb), 0));
assert_eq!("sw a5,-28(s0)", print::print(decode::decode(0xfef42223), 0));
assert_eq!("lw a5,-28(s0)", print::print(decode::decode(0xfe442783), 0));
assert_eq!("addi a4,a5,0", print::print(decode::decode(0x00078713), 0));
assert_eq!("lw a5,-24(s0)", print::print(decode::decode(0xfe842783), 0));
assert_eq!("divw a5,a4,a5", print::print(decode::decode(0x02f747bb), 0));
assert_eq!("sw a5,-20(s0)", print::print(decode::decode(0xfef42623), 0));
assert_eq!("addi a5,zero,0", print::print(decode::decode(0x00000793), 0));
assert_eq!("addi a0,a5,0", print::print(decode::decode(0x00078513), 0));
assert_eq!("ld s0,24(sp)", print::print(decode::decode(0x01813403), 0));
assert_eq!("addi sp,sp,32", print::print(decode::decode(0x02010113), 0));
assert_eq!("jalr zero,0(ra)", print::print(decode::decode(0x00008067), 0));
}
}

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//! # Register
//!
//! This mod contains the definition of the Register structs
//! for use within the Machine module.
use crate::simulator::machine::{NUM_FP_REGS, NUM_INT_REGS};
use std::ops::{Add, Sub};
/// Forcing the Register struct's generic type into having the following Traits
///
/// - Add
/// - Sub
/// - PartialEq
/// - Copy
///
/// Generally speaking, only numbers have the combinaison of these traits.
pub trait RegisterNum: Add<Output=Self> + Sub<Output=Self> + PartialEq + Copy {}
impl RegisterNum for i64 {}
impl RegisterNum for f32 {}
/// Machine register array
#[derive(PartialEq)]
pub struct Register<U: RegisterNum> {
/// 32 available registers of type U
register: [U; 32]
}
impl<U: RegisterNum> Register<U> {
/// Returns the current value held in register *position*
pub fn get_reg(&self, position: u8) -> U {
self.register[position as usize]
}
/// Set value of register *position* to *value*
///
/// Checking against trying to set a new value to the 0th register
/// as its value is NOT supposed to change
pub fn set_reg(&mut self, position: u8, value: U) {
if position != 0 { self.register[position as usize] = value; }
}
}
impl Register<i64> {
/// i64 register constructor
pub fn init() -> Register<i64> {
Register {
register: [0i64; NUM_INT_REGS]
}
}
}
impl Register<f32> {
/// f32 register constructor
pub fn init() -> Register<f32> {
Register {
register: [0f32; NUM_FP_REGS]
}
}
}

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//Nombre maximum de correspondances dans une table des pages
//Cette donnée devra a terme etre recupérée depuis un fichier de configuration
const MaxVirtPages : u64 = 200000;
/* Une table de correspondance propre à un processus
* Une variable de type TranslationTable devra etre possédée par un objet de type Process
*/
pub struct TranslationTable{
//capacité de cette table <=> nombre de correspondances possibles
//A voir si cette donnée doit etre immuable
pub maxNumPages : u64,
//la table en question
//Vec implemente le trait Index, donc un bon choix
pub pageTable : Vec<PageTableEntry>
}
impl TranslationTable {
pub fn create() -> TranslationTable {
let mut tmp_vec : Vec<PageTableEntry> = Vec::new();
for i in 0..MaxVirtPages {
tmp_vec.push(PageTableEntry::create());
}
TranslationTable{
maxNumPages : MaxVirtPages,
pageTable : tmp_vec
}
}
//vpn = virtual page number, c'est un index dans la table des page
//Assert a mettre dans chacune des fonctions suivantes
pub fn get_max_num_pages(&self) -> u64{
return self.maxNumPages;
}
pub fn set_physical_page(&mut self, vpn : u64, physical_page : i32){
self.pageTable[vpn as usize].physical_page = physical_page;
}
pub fn get_physical_page(&self, vpn : u64) -> i32{
self.pageTable[vpn as usize].physical_page
}
pub fn set_addr_disk(&mut self, vpn : u64, addr_disk : i32){
self.pageTable[vpn as usize].addr_disk = addr_disk;
}
pub fn get_addr_disk(&self, vpn : u64) -> i32 {
self.pageTable[vpn as usize].addr_disk
}
pub fn set_bit_valid(&mut self, vpn : u64){
self.pageTable[vpn as usize].valid = true;
}
pub fn clear_bit_valid(&mut self, vpn : u64){
self.pageTable[vpn as usize].valid = false;
}
pub fn get_bit_valid(&self, vpn : u64) -> bool{
self.pageTable[vpn as usize].valid
}
pub fn set_bit_io(&mut self, vpn : u64){
self.pageTable[vpn as usize].io = true;
}
pub fn clear_bit_io(&mut self, vpn : u64){
self.pageTable[vpn as usize].io = false;
}
pub fn get_bit_io(&self, vpn : u64) -> bool{
self.pageTable[vpn as usize].io
}
pub fn set_bit_swap(&mut self, vpn : u64){
self.pageTable[vpn as usize].swap = true;
}
pub fn clear_bit_swap(&mut self, vpn : u64){
self.pageTable[vpn as usize].swap = false;
}
pub fn get_bit_swap(&self, vpn : u64) -> bool{
self.pageTable[vpn as usize].swap
}
pub fn set_bit_write(&mut self, vpn : u64){
self.pageTable[vpn as usize].write_allowed = true;
}
pub fn clear_bit_write(&mut self, vpn : u64){
self.pageTable[vpn as usize].write_allowed = false;
}
pub fn get_bit_write(&self, vpn : u64) -> bool{
self.pageTable[vpn as usize].write_allowed
}
pub fn set_bit_read(&mut self, vpn : u64){
self.pageTable[vpn as usize].read_allowed = true;
}
pub fn clear_bit_read(&mut self, vpn : u64){
self.pageTable[vpn as usize].read_allowed = false;
}
pub fn get_bit_read(&self, vpn : u64) -> bool{
self.pageTable[vpn as usize].read_allowed
}
pub fn set_bit_U(&mut self, vpn : u64){
self.pageTable[vpn as usize].U = true;
}
pub fn clear_bit_U(&mut self, vpn : u64){
self.pageTable[vpn as usize].U = false;
}
pub fn get_bit_U(&self, vpn : u64) -> bool{
self.pageTable[vpn as usize].U
}
pub fn set_bit_M(&mut self, vpn : u64){
self.pageTable[vpn as usize].M = true;
}
pub fn clear_bit_M(&mut self, vpn : u64){
self.pageTable[vpn as usize].M = false;
}
pub fn get_bit_M(&self, vpn : u64) -> bool{
self.pageTable[vpn as usize].M
}
}
/* Une correspondance + données sur cette correspondance
*/
pub struct PageTableEntry{
//true <=> la correspondance est valide et la page est présente dans la ram
valid : bool,
//true <=> la page a été accédée (lecture/ecriture) récemment
U : bool,
//true <=> page modifiée mais non sauvegardée sur disque
M : bool,
//droits d'accès sur cette page
read_allowed : bool,
write_allowed : bool,
//numero de page physique <=> c'est notre correspondance
physical_page : i32,
//true <=> cette page doit etre chargée depuis la swap zone du disque
swap : bool,
//a définir plus tard, en relation avec swap
addr_disk : i32,
//mis à 1 par le système quand cette page est impliquée dans une opération d'IO
io : bool
}
impl PageTableEntry{
//Default PageTableEntry Constructor
pub fn create() -> PageTableEntry {
PageTableEntry {
valid : false,
U : false,
M : false,
read_allowed : false,
write_allowed : false,
physical_page : -1i32,
swap : false,
addr_disk : -1i32,
io : false
}
}
}

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//! Functions for burritos.cfg configuration file parsing.
//! Needed to set-up machine and system constants without
//! recompiling.
use std::{
fs::File,
path::Path,
collections::HashMap,
io::{
BufReader,
BufRead,
Error
}
};
/// Aliases the rather long HashMap<MachineSettingKey, i32> type
/// to a rather simpler to understand Settings.
pub type Settings = HashMap<MachineSettingKey, u64>;
/// Keys for the Settings HashMap, represented as enums for
/// maintainability.
#[derive(Eq, Hash, PartialEq, Debug)]
pub enum MachineSettingKey {
/// Number of physical pages.
NumPhysPages,
/// Stack size.
UserStackSize,
/// Maximum size of a file name
MaxFileNameSize,
/// Number of directory entries
NumDirEntries,
/// Processor Frequency
ProcessorFrequency,
/// Disk sector size
SectorSize,
/// Memory page size
PageSize,
/// Maximum number of Virtual Pages
MaxVirtPages,
/// In case of unknown key in configuration file.
Unknown
}
/// Allows for converting string slices to correspoding MachineSettingKey
/// enum value.
impl From<&str> for MachineSettingKey {
fn from(s: &str) -> Self {
match s {
"NumPhysPages" => MachineSettingKey::NumPhysPages,
"UserStackSize" => MachineSettingKey::UserStackSize,
"MaxFileNameSize" => MachineSettingKey::MaxFileNameSize,
"NumDirEntries" => MachineSettingKey::NumDirEntries,
"ProcessorFrequency" => MachineSettingKey::ProcessorFrequency,
"SectorSize" => MachineSettingKey::SectorSize,
"PageSize" => MachineSettingKey::PageSize,
"MaxVirtPages" => MachineSettingKey::MaxVirtPages,
_ => MachineSettingKey::Unknown
}
}
}
/// Tries to return a HashMap containing the user defined burritos configuration
/// in the burritos.cfg file.
///
/// If the file is not found, the function will return an io error.
///
/// If the configuration is invalid, the function may return a HashMap with missing or
/// non-sensical settings.
/// It is up to the caller to determine whether or not default values should be placed
/// instead of halting the program.
pub fn read_settings() -> Result<Settings, Error> {
// Opening file
let file = {
let file_path = "./burritos.cfg";
let file_path = Path::new(file_path);
match File::open(file_path) {
Ok(opened_file) => opened_file,
Err(error_message) => Err(error_message)?
}
};
let file_reader = BufReader::new(file);
let filtered_setting_strings = filter_garbage(file_reader);
let mut settings_map = Settings::new();
// Reading settings
for line in filtered_setting_strings {
let mut split_line = line.split_whitespace();
let key = split_line.next().unwrap_or("_");
split_line.next(); // Skipping '=' character
let setting = split_line.next().unwrap_or("_");
settings_map = update_settings_map(settings_map, key, setting);
}
Ok(settings_map)
}
/// Returns a mock configuration for Machine unit testing
/// FIXME: Does not cover the whole configuration yet
pub fn get_debug_configuration() -> Settings {
let mut settings_map = Settings::new();
settings_map.insert(MachineSettingKey::PageSize, 128);
settings_map.insert(MachineSettingKey::NumPhysPages, 400);
settings_map
}
fn filter_garbage<R: std::io::Read>(reader: BufReader<R>) -> Vec<String> {
reader.lines()
.map(|l| l.unwrap())
.filter(|l| !l.is_empty() && !l.starts_with("#"))
.collect()
}
fn update_settings_map(mut settings_map: Settings, key: &str, setting: &str) -> Settings {
let key = MachineSettingKey::from(key);
let setting = u64::from_str_radix(setting, 10).unwrap_or(0);
settings_map.insert(key, setting);
settings_map
}

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//! Data structure and definition of a generic single-linked LIFO list.
use std::ptr;
/// Definition of the generic single-linked FIFO list
///
/// Each elements points to a single item of the list and the following one
///
/// These methods wrap unsafe instructions because it doesn't respect borrow rules per example
/// but everything has been tested with miri to assure there's no Undefined Behaviour (use-after-free, double free, etc.)
/// or memory leak
#[derive(PartialEq, Clone, Debug)]
pub struct List<T: PartialEq> {
head: Link<T>,
tail: Link<T>,
}
type Link<T> = *mut Node<T>;
#[derive(PartialEq)]
struct Node<T> {
elem: T,
next: Link<T>,
}
/// Iterator structure for use in a for loop, pop elements before returning it
pub struct IntoIter<T: PartialEq>(List<T>);
/// Iterator structure for use in a for loop, dereference before returning it
pub struct Iter<'a, T> {
next: Option<&'a Node<T>>,
}
/// Same as Iter structure, returned item are mutable
pub struct IterMut<'a, T> {
next: Option<&'a mut Node<T>>,
}
impl<T: PartialEq> List<T> {
/// Push an item at the end of the list
pub fn push(&mut self, elem: T) {
unsafe {
let new_tail = Box::into_raw(Box::new(Node {
elem,
next: ptr::null_mut(),
}));
if !self.tail.is_null() {
(*self.tail).next = new_tail;
} else {
self.head = new_tail;
}
self.tail = new_tail;
}
}
/// Retrieve and remove the item at the head of the list.
///
/// Return None if list is empty
pub fn pop(&mut self) -> Option<T> {
unsafe {
if self.head.is_null() {
None
} else {
let head = Box::from_raw(self.head);
self.head = head.next;
if self.head.is_null() {
self.tail = ptr::null_mut();
}
Some(head.elem)
}
}
}
/// Retrieve without removing the item at the head of the list
///
/// Return None if list is empty
pub fn peek(&self) -> Option<&T> {
unsafe {
self.head.as_ref().map(|node| &node.elem)
}
}
/// Retrieve without removing the item at the head of the list as mutable
///
/// Return None if lsit is empty
pub fn peek_mut(&mut self) -> Option<&mut T> {
unsafe {
self.head.as_mut().map(|node| &mut node.elem)
}
}
/// Search for an element in the list
///
/// Return **bool** true if the list contains the element, false otherwise
///
/// Worst case complexity of this function is O(n)
pub fn contains(&self, elem: &T) -> bool {
let mut iter = self.iter();
let mut element = iter.next();
while element.is_some() {
if element.unwrap() == elem {
return true;
} else {
element = iter.next();
}
}
false
}
/// Remove the item from the list
///
/// Return true if the item has been found, otherwise return false
///
/// Worst-case complexity is O(n)
pub fn remove(&mut self, item: T)-> bool {
unsafe {
let mut current: *mut Node<T> = self.head;
let mut previous: *mut Node<T> = ptr::null_mut();
while !current.is_null() {
if (*current).elem == item {
if !previous.is_null() {
(*previous).next = (*current).next;
} else {
self.head = (*current).next;
}
drop(Box::from_raw(current).elem);
return true;
} else {
previous = current;
current = (*current).next;
}
}
}
false
}
/// Return true if the list is empty, false otherwise
pub fn is_empty(&self) -> bool {
self.head.is_null()
}
/// Turn the list into an iterator for use in a for loop per example.
///
/// When you iter using into_iter, elements are remove from the list
pub fn into_iter(self) -> IntoIter<T> {
IntoIter(self)
}
/// Turn the list into an iterator for use in a for loop
///
/// When you iter using this method, elements are dereferenced
pub fn iter(&self) -> Iter<'_, T> {
unsafe {
Iter { next: self.head.as_ref() }
}
}
/// Same as iter but make the iterator mutable
pub fn iter_mut(&mut self) -> IterMut<'_, T> {
unsafe {
IterMut { next: self.head.as_mut() }
}
}
}
impl<T: PartialEq> Default for List<T> {
/// Create an empty list
fn default() -> Self {
Self { head: ptr::null_mut(), tail: ptr::null_mut() }
}
}
impl<T: PartialEq> Drop for List<T> {
fn drop(&mut self) {
while self.pop().is_some() {} // removing every item from list (necessary as we using unsafe function)
}
}
impl<T: PartialEq> Iterator for IntoIter<T> {
type Item = T;
fn next(&mut self) -> Option<Self::Item> {
// access fields of a tuple struct numerically
self.0.pop()
}
}
impl<'a, T> Iterator for Iter<'a, T> {
type Item = &'a T;
fn next(&mut self) -> Option<Self::Item> {
unsafe {
self.next.map(|node| {
self.next = node.next.as_ref();
&node.elem
})
}
}
}
impl<'a, T> Iterator for IterMut<'a, T> {
type Item = &'a mut T;
fn next(&mut self) -> Option<Self::Item> {
unsafe {
self.next.take().map(|node| {
self.next = node.next.as_mut();
&mut node.elem
})
}
}
}
#[cfg(test)]
mod test {
use super::List;
#[test]
fn basics() {
let mut list = List::default();
// Check empty list behaves right
assert_eq!(list.pop(), None);
// Populate list
list.push(1);
list.push(2);
list.push(3);
// Check normal removal
assert_eq!(list.pop(), Some(1));
assert_eq!(list.pop(), Some(2));
// Push some more just to make sure nothing's corrupted
list.push(4);
list.push(5);
// Check normal removal
assert_eq!(list.pop(), Some(3));
assert_eq!(list.pop(), Some(4));
// Check exhaustion
assert_eq!(list.pop(), Some(5));
assert_eq!(list.pop(), None);
}
#[test]
fn peek() {
let mut list = List::default();
assert_eq!(list.peek(), None);
assert_eq!(list.peek_mut(), None);
list.push(1);
list.push(2);
list.push(3);
assert_eq!(list.peek(), Some(&1));
assert_eq!(list.peek_mut(), Some(&mut 1));
}
#[test]
fn into_iter() {
let mut list = List::default();
list.push(1);
list.push(2);
list.push(3);
let mut iter = list.into_iter();
assert_eq!(iter.next(), Some(1));
assert_eq!(iter.next(), Some(2));
assert_eq!(iter.next(), Some(3));
assert_eq!(iter.next(), None);
}
#[test]
fn iter() {
let mut list = List::default();
list.push(1);
list.push(2);
list.push(3);
let mut iter = list.iter();
assert_eq!(iter.next(), Some(&1));
assert_eq!(iter.next(), Some(&2));
assert_eq!(iter.next(), Some(&3));
}
#[test]
fn iter_mut() {
let mut list = List::default();
list.push(1);
list.push(2);
list.push(3);
let mut iter = list.iter_mut();
assert_eq!(iter.next(), Some(&mut 1));
assert_eq!(iter.next(), Some(&mut 2));
assert_eq!(iter.next(), Some(&mut 3));
}
#[test]
fn contains_test() {
let mut list = List::default();
assert_eq!(list.peek(), None);
list.push(1);
list.push(2);
list.push(3);
assert_eq!(list.contains(&1), true);
assert_eq!(list.contains(&4), false);
}
#[test]
fn remove_test() {
let mut list = List::default();
assert_eq!(list.peek(), None);
list.push(1);
list.push(2);
list.push(3);
assert_eq!(list.contains(&2), true);
list.remove(2);
assert_eq!(list.contains(&2), false);
assert_eq!(list.pop(), Option::Some(1));
assert_eq!(list.pop(), Option::Some(3));
assert_eq!(list.peek(), Option::None);
}
#[test]
fn remove_test2() {
let mut list = List::default();
assert_eq!(list.peek(), None);
list.push(1);
list.push(2);
list.push(3);
assert_eq!(list.contains(&1), true);
list.remove(1);
assert_eq!(list.contains(&1), false);
assert_eq!(list.pop(), Option::Some(2));
assert_eq!(list.pop(), Option::Some(3));
assert_eq!(list.peek(), Option::None);
}
#[test]
fn miri_test() {
let mut list = List::default();
list.push(1);
list.push(2);
list.push(3);
assert!(list.pop() == Some(1));
list.push(4);
assert!(list.pop() == Some(2));
list.push(5);
assert!(list.peek() == Some(&3));
list.push(6);
list.peek_mut().map(|x| *x *= 10);
assert!(list.peek() == Some(&30));
assert!(list.pop() == Some(30));
for elem in list.iter_mut() {
*elem *= 100;
}
let mut iter = list.iter();
assert_eq!(iter.next(), Some(&400));
assert_eq!(iter.next(), Some(&500));
assert_eq!(iter.next(), Some(&600));
assert_eq!(iter.next(), None);
assert_eq!(iter.next(), None);
assert!(list.pop() == Some(400));
list.peek_mut().map(|x| *x *= 10);
assert!(list.peek() == Some(&5000));
list.push(7);
}
}

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pub mod list;
pub mod objaddr;
pub mod cfg;

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//! Burritos stores a data structure associating object ids with
//! their references. The ObjAddr struct
//! allows to maintain this data structure.
use std::{collections::HashMap, cell::RefCell, rc::Rc};
use crate::kernel::{synch::{ Semaphore, Lock }, thread::Thread};
/// Brief Definition of object identifiers:
///
/// The struct stores the list of created objects (Semaphore, Lock, ...) and for each of them
/// associates an object identifier than can be passed to subsequent
/// system calls on the object.
///
/// A method allows to detect of an object corresponding to a given
/// identifier exists; this is used to check the parameters of system
/// calls.
#[derive(PartialEq)]
pub struct ObjAddr {
last_id: i32,
semaphores: HashMap<i32, Semaphore>,
locks: HashMap<i32, Lock>,
threads: HashMap<i32, Rc<RefCell<Thread>>>,
}
impl ObjAddr {
/// Initializes and returns a ObjAddr struct
pub fn init() -> Self {
Self {
last_id: 3,
semaphores: HashMap::<i32, Semaphore>::new(),
locks: HashMap::<i32, Lock>::new(),
threads: HashMap::<i32, Rc<RefCell<Thread>>>::new(),
}
}
/// Adds the **obj** Semaphore to self
pub fn add_semaphore(&mut self, obj: Semaphore) -> i32 {
self.last_id += 1;
self.semaphores.insert(self.last_id, obj);
self.last_id
}
/// Adds the **obj** Lock to self
pub fn add_lock(&mut self, obj: Lock) -> i32 {
self.last_id += 1;
self.locks.insert(self.last_id, obj);
self.last_id
}
/// Adds the **obj** Lock to self
pub fn add_thread(&mut self, obj: Rc<RefCell<Thread>>) -> i32 {
self.last_id +=1;
self.threads.insert(self.last_id, obj);
self.last_id
}
/// Searches for a semaphore of id **id** in self
pub fn search_semaphore(&mut self, id: i32) -> Option<&mut Semaphore> {
self.semaphores.get_mut(&id)
}
/// Searches for a lock of id **id** in self
pub fn search_lock(&mut self, id:i32) -> Option<&mut Lock> {
self.locks.get_mut(&id)
}
/// Update lock at given id
pub fn update_lock(&mut self, id: i32, lock: Lock) {
self.locks.insert(id, lock);
}
/// Searches for a lock of id **id** in self
pub fn search_thread(&mut self, id: i32) -> Option<&Rc<RefCell<Thread>>> {
self.threads.get(&id)
}
/// Removes the object of id **id** from self if it exists
pub fn remove_semaphore(&mut self, id: i32) -> Option<Semaphore> {
self.semaphores.remove(&id)
}
/// Remove the object of id **id** from self if it exists
pub fn remove_lock(&mut self, id:i32) -> Option<Lock> {
self.locks.remove(&id)
}
/// Remove the object of id **id** from self if it exists
pub fn remove_thread(&mut self, id: i32) -> Option<Rc<RefCell<Thread>>> {
self.threads.remove(&id)
}
}

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clean:
make clean -C riscv_instructions
make clean -C syscall_tests

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23
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0 4199492 4215360 0 0 0 0 0 4215408 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 4199492 4215360 0 0 0 0 0 4215408 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 4199492 4215360 0 0 0 0 0 4215376 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 4199492 4215360 0 0 0 0 0 4215376 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 4199492 4215360 0 0 0 0 0 4215376 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 4199492 4215360 0 0 0 0 0 4215408 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 4199492 4215376 0 0 0 0 0 4215408 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 4199492 4215376 0 0 0 0 0 4215408 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 4199492 4215376 0 0 0 0 0 4215408 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 4199492 4215376 0 0 0 0 0 4215408 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 4199492 4215376 0 0 0 0 0 4215408 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 4199492 4215376 0 0 0 0 0 4215408 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215408 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215408 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215408 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16400 4215408 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16400 4215408 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0

23
test/machine/reg_traceMult.txt Normal file
View File

@ -0,0 +1,23 @@
0 0 4215408 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 4198400 4215408 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215408 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 -1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 -1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 -1 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 -1 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 -1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 -1 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 -1 0 0 0 1 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 -1 0 0 0 1 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 -1 0 0 0 1 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 -1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215408 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215408 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215408 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16400 4215408 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16400 4215408 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0

14
test/machine/reg_traceRet.txt Normal file
View File

@ -0,0 +1,14 @@
0 0 4215408 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 4198400 4215408 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215408 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215392 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215392 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215392 0 0 0 0 0 4215408 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215392 0 0 0 0 0 4215408 0 -1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215392 0 0 0 0 0 4215408 0 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215392 0 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215408 0 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215408 0 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215408 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16400 4215408 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16400 4215408 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0

23
test/machine/reg_traceSub.txt Normal file
View File

@ -0,0 +1,23 @@
0 0 4215408 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 4198400 4215408 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215408 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 -1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 -1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 -1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 -1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 -1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 -1 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 -1 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 -1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 -1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 -1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215408 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215408 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215408 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16400 4215408 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16400 4215408 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0

19
test/machine/reg_traceSwitch.txt Normal file
View File

@ -0,0 +1,19 @@
0 0 4215408 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 4198400 4215408 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215408 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 -1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 -1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 4215408 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215376 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215408 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215408 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16392 4215408 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16400 4215408 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 16400 4215408 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0

6
test/riscv_instructions/.gitignore vendored Normal file
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@ -0,0 +1,6 @@
*
!.gitignore
!*.c
!*/
!*.md
!**/Makefile

14
test/riscv_instructions/Makefile Normal file
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@ -0,0 +1,14 @@
build:
make build -C boolean_logic/
make build -C jump_instructions/
make build -C simple_arithmetics/
dumps:
make dumps -C boolean_logic/
make dumps -C jump_instructions/
make dumps -C simple_arithmetics/
clean:
$(MAKE) clean -C boolean_logic/
$(MAKE) clean -C jump_instructions/
$(MAKE) clean -C simple_arithmetics/

14
test/riscv_instructions/boolean_logic/Makefile Normal file
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@ -0,0 +1,14 @@
PROGRAMS = comparisons.guac if.guac switch.guac
TOPDIR = ../../..
include $(TOPDIR)/Makefile.rules
build: $(PROGRAMS)
dumps: comparisons.dump if.dump switch.dump
clean:
$(RM) *.o *.guac
# Dependances
$(PROGRAMS): %.guac : $(USERLIB)/sys.o $(USERLIB)/libnachos.o %.o

0
test_programs/riscv_instructions/boolean_logic/comparisons.c → test/riscv_instructions/boolean_logic/comparisons.c
View File

0
test_programs/riscv_instructions/boolean_logic/if.c → test/riscv_instructions/boolean_logic/if.c
View File

0
test_programs/riscv_instructions/boolean_logic/new_comparisons.c → test/riscv_instructions/boolean_logic/new_comparisons.c
View File

0
test_programs/riscv_instructions/boolean_logic/switch.c → test/riscv_instructions/boolean_logic/switch.c
View File

12
test/riscv_instructions/jump_instructions/Makefile Normal file
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@ -0,0 +1,12 @@
PROGRAMS = jump.guac ret.guac
TOPDIR = ../../..
include $(TOPDIR)/Makefile.rules
build: $(PROGRAMS)
dumps: jump.dump ret.dump
clean:
$(RM) *.o *.guac
$(PROGRAMS): %.guac : $(USERLIB)/sys.o $(USERLIB)/libnachos.o %.o

0
test_programs/riscv_instructions/jump_instructions/jump.c → test/riscv_instructions/jump_instructions/jump.c
View File

0
test_programs/riscv_instructions/jump_instructions/ret.c → test/riscv_instructions/jump_instructions/ret.c
View File

12
test/riscv_instructions/simple_arithmetics/Makefile Normal file
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@ -0,0 +1,12 @@
PROGRAMS = unsigned_addition.guac unsigned_division.guac unsigned_multiplication.guac unsigned_substraction.guac
TOPDIR = ../../..
include $(TOPDIR)/Makefile.rules
build: $(PROGRAMS)
dumps: unsigned_addition.dump unsigned_division.dump unsigned_multiplication.dump unsigned_substraction.dump
clean:
$(RM) *.o *.guac
$(PROGRAMS): %.guac : $(USERLIB)/sys.o $(USERLIB)/libnachos.o %.o

0
test_programs/riscv_instructions/simple_arithmetics/README.md → test/riscv_instructions/simple_arithmetics/README.md
View File

0
test_programs/riscv_instructions/simple_arithmetics/unsigned_addition.c → test/riscv_instructions/simple_arithmetics/unsigned_addition.c
View File

0
test_programs/riscv_instructions/simple_arithmetics/unsigned_division.c → test/riscv_instructions/simple_arithmetics/unsigned_division.c
View File

0
test_programs/riscv_instructions/simple_arithmetics/unsigned_multiplication.c → test/riscv_instructions/simple_arithmetics/unsigned_multiplication.c
View File

0
test_programs/riscv_instructions/simple_arithmetics/unsigned_substraction.c → test/riscv_instructions/simple_arithmetics/unsigned_substraction.c
View File

12
test/syscall_tests/Makefile Normal file
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@ -0,0 +1,12 @@
PROGRAMS = halt.guac prints.guac producteur_consommateur.guac join.guac
TOPDIR = ../..
include $(TOPDIR)/Makefile.rules
build: $(PROGRAMS)
dumps: halt.dump prints.dump
clean:
$(RM) *.o *.guac
$(PROGRAMS): %.guac : $(USERLIB)/sys.o $(USERLIB)/libnachos.o %.o

7
test/syscall_tests/halt.c Normal file
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@ -0,0 +1,7 @@
#include "userlib/syscall.h"
int main() {
Shutdown();
return 0;
}

26
test/syscall_tests/join.c Normal file
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@ -0,0 +1,26 @@
#include "userlib/syscall.h"
#include "userlib/libnachos.h"
void thread1() {
for(int i = 0; i < 10; i++)
{
n_printf("Hello from th1\n");
}
}
void thread2() {
for(int i = 0; i < 10; i++)
{
n_printf("Hello from th2\n");
}
}
int main() {
ThreadId th1 = threadCreate("thread 1", thread1);
ThreadId th2 = threadCreate("thread 2", thread2);
Join(th1);
Join(th2);
Shutdown();
return 0;
}

10
test/syscall_tests/prints.c Normal file
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@ -0,0 +1,10 @@
#include "userlib/syscall.h"
#include "userlib/libnachos.h"
int main() {
n_printf("Hello World 1");
n_printf("Hello World 2");
n_printf("Hello World 3");
n_printf("Hello World 4");
return 0;
}

48
test/syscall_tests/producteur_consommateur.c Normal file
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@ -0,0 +1,48 @@
#include "userlib/syscall.h"
#include "userlib/libnachos.h"
const int N = 3;
int iplein = 0;
int ivide = 0;
int tab[3];
SemId svide;
SemId splein;
void producteur();
void consommateur();
int main() {
svide = SemCreate("producteur", N);
splein = SemCreate("consommateur", 0);
ThreadId producteurTh = threadCreate("producteur", producteur);
ThreadId consommateurTh = threadCreate("consommateur", consommateur);
Join(producteurTh);
Join(consommateurTh);
return 0;
}
void producteur() {
for(int i = 0; i < 10; i++)
{
n_printf("batir une information\n");
P(svide);
iplein = (iplein + 1) % N;
n_printf("communique une information : %d\n", i);
tab[iplein] = i;
V(splein);
}
}
void consommateur() {
for(int i = 0; i < 10; i++)
{
P(splein);
ivide = (ivide +1) % N;
n_printf("recevoir une information\n");
int info = tab[ivide];
V(svide);
n_printf("exploiter l'information : %d\n", info);
}
}

21
test_programs/Makefile
View File

@ -1,21 +0,0 @@
TOPDIR=.
include $(TOPDIR)/Makefile.config
#
# Main targets
#
dumps:
$(MAKE) dumps -C riscv_instructions/
mkdir -p ${TOPDIR}/target/dumps/
find . -name '*.dump' -exec mv {} ${TOPDIR}/target/dumps/ \;
user_lib:
$(MAKE) -C userlib/
tests: user_lib
$(MAKE) tests -C riscv_instructions/
mkdir -p ${TOPDIR}/target/guac/
find . -name '*.guac' -exec mv {} ${TOPDIR}/target/guac/ \;
clean:
rm -rf $(TOPDIR)/target

9
test_programs/riscv_instructions/Makefile
View File

@ -1,9 +0,0 @@
dumps:
make dumps -C boolean_logic/
make dumps -C jump_instructions/
make dumps -C simple_arithmetics/
tests:
make tests -C boolean_logic/
make tests -C jump_instructions/
make tests -C simple_arithmetics/

9
test_programs/riscv_instructions/boolean_logic/Makefile
View File

@ -1,9 +0,0 @@
TOPDIR = ../..
include $(TOPDIR)/Makefile.tests
dumps: comparisons.dump if.dump switch.dump
tests: comparisons.guac if.guac switch.guac
# Dependances
$(PROGRAMS): % : $(USERLIB)/sys.o $(USERLIB)/libnachos.o %.o

6
test_programs/riscv_instructions/jump_instructions/Makefile
View File

@ -1,6 +0,0 @@
TOPDIR = ../..
include $(TOPDIR)/Makefile.tests
dumps: jump.dump ret.dump
tests: jump.guac ret.guac

6
test_programs/riscv_instructions/simple_arithmetics/Makefile
View File

@ -1,6 +0,0 @@
TOPDIR = ../..
include $(TOPDIR)/Makefile.tests
dumps: unsigned_addition.dump unsigned_division.dump unsigned_multiplication.dump unsigned_substraction.dump
tests: unsigned_addition.guac unsigned_division.guac unsigned_multiplication.guac unsigned_substraction.guac

4
test_programs/userlib/Makefile
View File

@ -1,4 +0,0 @@
TOPDIR = ../
include $(TOPDIR)/Makefile.tests
default: sys.o libnachos.o

7
userlib/Makefile Normal file
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@ -0,0 +1,7 @@
TOPDIR = ../
include $(TOPDIR)/Makefile.rules
default: sys.o libnachos.o
clean:
$(RM) libnachos.o sys.o

0
test_programs/userlib/ldscript.lds → userlib/ldscript.lds
View File

0
test_programs/userlib/libnachos.c → userlib/libnachos.c
View File

0
test_programs/userlib/libnachos.h → userlib/libnachos.h
View File

8
test_programs/userlib/sys.s → userlib/sys.s
View File

@ -1,5 +1,5 @@
/* Start.s /* Start.s
* Assembly language assist for user programs running on top of Nachos. * Assembly language assist for user programs running on top of BurritOS.
* *
* Since we don't want to pull in the entire C library, we define * Since we don't want to pull in the entire C library, we define
* what we need for a user program here, namely Start and the system * what we need for a user program here, namely Start and the system
@ -63,9 +63,9 @@ __start:
* ------------------------------------------------------------- * -------------------------------------------------------------
*/ */
.globl Halt .globl Shutdown
.type __Halt, @function .type __Shutdown, @function
Halt: Shutdown:
addi a7,zero,SC_HALT addi a7,zero,SC_HALT
ecall ecall
jr ra jr ra

2
test_programs/userlib/syscall.h → userlib/syscall.h
View File

@ -84,7 +84,7 @@
typedef int t_error; typedef int t_error;
/* Stop Nachos, and print out performance stats */ /* Stop Nachos, and print out performance stats */
void Halt(); void Shutdown();
/* Return the time spent running Nachos */ /* Return the time spent running Nachos */

183
userlib/syscall.rs Normal file
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@ -0,0 +1,183 @@
use std::str::Chars;
/// Define the BurritOS running time basic unit
pub struct BurritosTime {
seconds: i64,
nanos: i64
}
/// A unique identifier for a thread executed within a user program
pub struct ThreadId{
id: u64
}
/// The system call interface. These are the operations the BurritOS
/// kernel needs to support, to be able to run user programs.
pub struct TError {
t: i32
}
/// A unique identifier for an open BurritOS file.
pub struct OpenFiledId{
id: u64
}
/// System calls concerning semaphores management
pub struct SemId{
id: u64
}
/// System calls concerning locks management
pub struct LockId{
id: u64
}
/// System calls concerning conditions variables.
pub struct CondId{
id: u64
}
extern "C" {
///Stop BurritOS, and print out performance stats
fn Shutdown() -> ();
/// Return the time spent running BurritOS
/// ## Param
/// - **t** a struct to define the time unit
fn SysTime(t: BurritosTime) -> ();
/// This user program is done
/// ## Param
/// - **status** status at the end of execution *(status = 0 means exited normally)*.
fn Exit(status: i32) -> ();
/// Run the executable, stored in the BurritOS file "name", and return the
/// master thread identifier
fn Exec(name: *const char) -> ThreadId;
/// Create a new thread in the current process
/// Return thread identifier
fn newThread(debug_name: *const char, func: i32, arg: i32) -> ThreadId;
/// Only return once the the thread "id" has finished.
fn Join (id: ThreadId) -> TError;
/// Yield the CPU to another runnable thread, whether in this address space
/// or not.
fn Yield() -> ();
/// Print the last error message with the personalized one "mess"
fn PError(mess: *const char) -> ();
/// Create a BurritOS file, with "name"
fn Create(name: *const char, size: i32) -> TError;
/// Open the Nachos file "name", and return an "OpenFileId" that can
/// be used to read and write to the file.
fn Open(name: *const char) -> OpenFiledId;
/// Write "size" bytes from "buffer" to the open file.
fn Write(buffer: *const char, size: i32, id: OpenFiledId) -> TError;
/// Read "size" bytes from the open file into "buffer".
/// Return the number of bytes actually read -- if the open file isn't
/// long enough, or if it is an I/O device, and there aren't enough
/// characters to read, return whatever is available (for I/O devices,
/// you should always wait until you can return at least one character).
fn Read(buffer: *const char, size: i32, id:OpenFiledId) -> TError;
/// Seek to a specified offset into an opened file
fn Seek(offset: i32, id: OpenFiledId) -> TError;
/// Close the file, we're done reading and writing to it.
fn Close(id: OpenFiledId) -> TError;
/// Remove the file
fn Remove(name: *const char) -> TError;
////////////////////////////////////////////////////
/// system calls concerning directory management ///
////////////////////////////////////////////////////
/// Create a new repertory
/// Return a negative number if an error ocurred.
fn mkdir(name: *const char) -> t_length;
/// Destroy a repertory, which must be empty.
/// Return a negative number if an error ocurred.
fn Rmdir(name: *const char) -> TError;
/// List the content of BurritOS FileSystem
fn FSList() -> TError;
/// Create a semaphore, initialising it at count.
/// Return a Semid, which will enable to do operations on this
/// semaphore
fn SemCreate(debug_name: *const char, count: i32) -> SemId;
/// Destroy a semaphore identified by sema.
/// Return a negative number if an error occured during the destruction
fn SemDestroy(sema: SemId) -> TError;
/// Do the operation P() on the semaphore sema
fn P(sema: SemId) -> TError;
/// Do the operation V() on the semaphore sema
fn V(sema: SemId) -> TError;
/// Create a lock.
/// Return an identifier
fn LockCreate(debug_name: *const char) -> LockId;
/// Destroy a lock.
/// Return a negative number if an error ocurred
/// during the destruction.
fn LockDestroy(id: LockId) -> TError;
/// Do the operation Acquire on the lock id.
/// Return a negative number if an error ocurred.
fn LockAcquire(id: LockId) -> TError;
/// Do the operation Release on the lock id.
/// Return a negative number if an error ocurred.
fn LockRelease(id: LockId) -> TError;
/// Create a new condition variable
fn CondCreate(debug_name: *const char) -> CondId;
/// Destroy a condition variable.
/// Return a negative number if an error ocurred.
fn CondDestroy(id: CondId) -> TError;
/// Do the operation Wait on a condition variable.
/// Returns a negative number if an error ocurred.
fn CondWait(id: CondId) -> TError;
/// Do the operation Signal on a condition variable (wake up only one thread).
/// Return a negative number if an error ocurred.
fn CondSignal(id: CondId) -> TError;
/// Do the operation Signal on a condition variable (wake up all threads).
/// Return a negative number if an error ocurred.
fn CondBroadcast(id: CondId) -> TError;
///////////////////////////////////////////////////////
/// # System calls concerning serial port and console
///////////////////////////////////////////////////////
///Send the message on the serial communication link.
/// Returns the number of bytes successfully sent.
fn TtySend(mess: *const char) -> i32;
/// Wait for a message comming from the serial communication link.
/// The length of the buffer where the bytes will be copied is given as a parameter.
/// Returns the number of characters actually received.
fn TtyReceive(mess: *const char, length: i32) -> i32;
/// Map an opened file in memory. Size is the size to be mapped in bytes.
fn Mmap(id: OpenFiledId, size: i32) -> *mut ();
/// For debug purpose
fn Debug(param: i32)-> ();
}