Try loading code at runtime

.cargo/config.toml

@@ -6,4 +6,4 @@ build-std = ["core", "compiler_builtins", "alloc"]
 build-std-features = ["compiler-builtins-mem"]
 
 [target.riscv64]
-runner = "qemu-system-riscv64 -machine virt -device bochs-display -bios none -m 512M -device loader,file=/home/julien/ensimag/TPs/kernel/disk.img,addr=0x90000000 -kernel"
+runner = "qemu-system-riscv64 -machine virt -device bochs-display -bios none -m 512M -device loader,file=/home/julien/ensimag/TPs/kernel/disk.img,addr=0x90000000 -s -S -kernel"

.gitignore

@@ -4,3 +4,4 @@
 Cargo.lock
 
 disk.img
+out.mem

Cargo.toml

@@ -1,7 +1,7 @@
-[package]
+[workspace]
-name = "kernel-rust"
+resolver = "3"
-version = "0.1.0"
+members = ["kernel", "test_pic"]
-edition = "2024"
+default-members = ["kernel"]
 
 [profile.dev]
 panic = "abort"
@@ -10,9 +10,3 @@ opt-level = 0
 [profile.release]
 panic = "abort"
 debug = true
-
-[dependencies]
-embedded-alloc = "0.7"
-kernel-macros = { path = "kernel-macros" }
-log = "0.4"
-critical-section = { version = "1", features = ["restore-state-bool"] }

bffs/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "bffs"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

bffs/src/lib.rs

@@ -0,0 +1,3 @@
+#![no_std]
+
+const MAGIC_NUMBER: usize = 0xBFF5;

kernel.svg

@@ -1,115 +0,0 @@
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kernel/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "kernel-rust"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+embedded-alloc = "0.7"
+kernel-macros = { path = "../kernel-macros" }
+log = "0.4"
+critical-section = { version = "1", features = ["restore-state-bool"] }
+bffs = { path = "../bffs" }

kernel/src/interrupt.rs

@@ -108,6 +108,9 @@ unsafe extern "C" fn supervisor_trap_handler(
                             str::from_raw_parts(a1 as *const u8, a2 as usize)
                         })
                     }
+                    SysCall::WriteIntTemp => {
+                        info!("Print from user space int : {}, {:x}", a1, a1)
+                    }
                     SysCall::Unimplemented => {
                         unimplemented!("Syscall {syscall_u64} is not implemented")
                     }

kernel/src/main.rs

@@ -62,7 +62,7 @@ pub extern "C" fn supervisor_mode_entry() {
     create_process(test, "proc1");
     create_process(proc2, "proc2");
 
-    MemoryDisk::new();
+    // MemoryDisk::new();
 
     enable_supervisor_interrupt();
     idle();

kernel/src/syscall.rs

@@ -3,6 +3,7 @@ use core::time::Duration;
 #[repr(u64)]
 pub enum SysCall {
     NanoSleep = 101,
+    WriteIntTemp = 998,
     WriteTemp = 999,
     Unimplemented = 1 << 31,
 }
@@ -11,6 +12,7 @@ impl From<u64> for SysCall {
     fn from(value: u64) -> Self {
         match value {
             101 => SysCall::NanoSleep,
+            998 => SysCall::WriteIntTemp,
             999 => SysCall::WriteTemp,
             _ => SysCall::Unimplemented,
         }
@@ -89,3 +91,8 @@ pub fn write_string_temp(content: &'static str) {
         );
     }
 }
+pub fn write_int_temp(content: u64) {
+    unsafe {
+        syscall!(SysCall::WriteIntTemp, content);
+    }
+}

kernel/src/user.rs

@@ -0,0 +1,26 @@
+use core::{arch::asm, time::Duration};
+
+use log::info;
+
+use crate::syscall::{sleep, write_int_temp, write_string_temp};
+
+#[repr(align(32))]
+struct Alignement([u8; 132]);
+
+static PROG: Alignement = Alignement(*include_bytes!("../../out.mem"));
+
+pub fn test() {
+    write_int_temp(PROG.0.as_ptr() as u64);
+    unsafe { core::mem::transmute::<*const u8, extern "C" fn()>(PROG.0.as_ptr())() }
+    loop {
+        write_string_temp("test");
+        sleep(Duration::new(2, 0));
+    }
+}
+
+pub fn proc2() {
+    loop {
+        write_string_temp("proc2");
+        sleep(Duration::new(3, 0));
+    }
+}

src/user.rs

@@ -1,17 +0,0 @@
-use core::time::Duration;
-
-use crate::syscall::{sleep, write_string_temp};
-
-pub fn test() {
-    loop {
-        write_string_temp("test");
-        sleep(Duration::new(2, 0));
-    }
-}
-
-pub fn proc2() {
-    loop {
-        write_string_temp("proc2");
-        sleep(Duration::new(3, 0));
-    }
-}

test_pic/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "test_pic"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

test_pic/build.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("cargo::rustc-link-arg=-Tilm.ld");
+}

test_pic/src/main.rs

@@ -0,0 +1,24 @@
+#![no_std]
+#![no_main]
+
+use core::arch::global_asm;
+
+#[panic_handler]
+fn panic(_panic_info: &core::panic::PanicInfo) -> ! {
+    loop {}
+}
+
+#[unsafe(no_mangle)]
+pub extern "C" fn entry() {
+    let test = "Hello from user mode";
+    unsafe {
+        core::arch::asm!(
+            "ecall",
+            in("a0") 999,
+            in("a1") test.as_ptr(),
+            in("a2") test.len(),
+            clobber_abi("system")
+        );
+    }
+    loop {}
+}