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Nographic mode, fix userspace transition by setting kernel TLS back on syscall

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This commit is contained in:
Jeremy Soller 2016-09-08 15:45:26 -06:00
parent fb0df8530d
commit a5d79d7957
6 changed files with 48 additions and 16 deletions
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21
arch/x86_64/src/lib.rs
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@ -48,7 +48,8 @@ macro_rules! interrupt {
}
// Push scratch registers
asm!("push rax
asm!("xchg bx, bx
push rax
push rcx
push rdx
push rdi
@ -56,14 +57,19 @@ macro_rules! interrupt {
push r8
push r9
push r10
push r11"
push r11
push fs
mov rax, 0x18
mov fs, ax"
: : : : "intel", "volatile");
// Call inner rust function
inner();
// Pop scratch registers and return
asm!("pop r11
asm!("xchg bx, bx
pop fs
pop r11
pop r10
pop r9
pop r8
@ -98,14 +104,19 @@ macro_rules! interrupt_error {
push r8
push r9
push r10
push r11"
push r11
push fs
mov rax, 0x18
mov fs, ax"
: : : : "intel", "volatile");
// Call inner rust function
inner();
// Pop scratch registers, error code, and return
asm!("pop r11
asm!("xchg bx, bx
pop fs
pop r11
pop r10
pop r9
pop r8