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double faulting in thread start while pushing thread's general registers
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Signed-off-by: Julien CLEMENT <julien.clement@epita.fr>
This commit is contained in:
Julien CLEMENT 2022-12-31 03:49:04 +01:00
parent 5a4f8a561e
commit 2522ece23f
1 changed files with 28 additions and 9 deletions
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37
src/proc/thread/mod.rs
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@ -53,23 +53,28 @@ impl Thread {
unsafe {
Thread {
id: ThreadId::new(),
rsp: alloc(Layout::new::<[u8; STACK_SIZE]>()) as u64,
rsp: alloc(Layout::new::<[u8; STACK_SIZE]>()) as u64 + STACK_SIZE as u64 - 0x80,
}
}
}
pub async fn start(&mut self, rip: u64) {
unsafe {
*RUNNING_THREAD.lock().await = self.id;
asm!(
"pusha", // Save current thread regs
"push rax", // Save current thread regs
"push rbx",
"push rcx",
"push rdx",
"push rbp",
"push rsi",
"push rdi",
"push rsp", // Recover current rsp
"pop {out}",
out = out(reg) self.rsp, // Save current rsp
out = out(reg) KERNEL_THREAD.lock().await.rsp, // Save current rsp
);
}
*RUNNING_THREAD.lock().await = self.id;
unsafe {
asm!(
"push {rsp}",
"pop rsp",
@ -83,10 +88,17 @@ impl Thread {
pub async fn run(&mut self) {
unsafe {
asm!(
"pusha", // Save current thread regs
"push rax", // Save current thread regs
"push rbx",
"push rcx",
"push rdx",
"push rbp",
"push rsi",
"push rdi",
"push rsp", // Recover current rsp
"pop {out}",
out = out(reg) self.rsp, // Save current rsp
out = out(reg) KERNEL_THREAD.lock().await.rsp, // Save current rsp
);
*RUNNING_THREAD.lock().await = self.id; // change running thread
@ -94,7 +106,14 @@ impl Thread {
asm!(
"push {rsp}", // Set stack pointer to the new thread
"pop rsp",
"popa", // Restore new thread regs
"pop rdi", // Restore new thread regs
"pop rsi",
"pop rbp",
"pop rdx",
"pop rcx",
"pop rbx",
"pop rax",
rsp = in(reg) self.rsp,
);
}