73 lines
2.3 KiB
Rust
73 lines
2.3 KiB
Rust
|
pub struct Context {
|
||
|
|
flags: usize,
|
||
|
|
bx: usize,
|
||
|
|
r12: usize,
|
||
|
|
r13: usize,
|
||
|
|
r14: usize,
|
||
|
|
r15: usize,
|
||
|
|
bp: usize,
|
||
|
|
sp: usize,
|
||
|
|
cr3: usize
|
||
|
|
}
|
||
|
|
|
||
|
|
impl Context {
|
||
|
|
pub fn new() -> Context {
|
||
|
|
Context {
|
||
|
|
flags: 0,
|
||
|
|
bx: 0,
|
||
|
|
r12: 0,
|
||
|
|
r13: 0,
|
||
|
|
r14: 0,
|
||
|
|
r15: 0,
|
||
|
|
bp: 0,
|
||
|
|
sp: 0,
|
||
|
|
cr3: 0
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[inline(never)]
|
||
|
|
#[naked]
|
||
|
|
pub unsafe fn switch_to(&mut self, next: &mut Context) {
|
||
|
|
asm!("xchg bx, bx" : : : "memory" : "intel", "volatile");
|
||
|
|
|
||
|
|
/*
|
||
|
|
asm!("fxsave [$0]" : : "r"(self.fx) : "memory" : "intel", "volatile");
|
||
|
|
self.loadable = true;
|
||
|
|
if next.loadable {
|
||
|
|
asm!("fxrstor [$0]" : : "r"(next.fx) : "memory" : "intel", "volatile");
|
||
|
|
}else{
|
||
|
|
asm!("fninit" : : : "memory" : "intel", "volatile");
|
||
|
|
}
|
||
|
|
*/
|
||
|
|
|
||
|
|
asm!("pushfq ; pop $0" : "=r"(self.flags) : : "memory" : "intel", "volatile");
|
||
|
|
asm!("push $0 ; popfq" : : "r"(next.flags) : "memory" : "intel", "volatile");
|
||
|
|
|
||
|
|
asm!("mov $0, rbx" : "=r"(self.bx) : : "memory" : "intel", "volatile");
|
||
|
|
asm!("mov rbx, $0" : : "r"(next.bx) : "memory" : "intel", "volatile");
|
||
|
|
|
||
|
|
asm!("mov $0, r12" : "=r"(self.r12) : : "memory" : "intel", "volatile");
|
||
|
|
asm!("mov r12, $0" : : "r"(next.r12) : "memory" : "intel", "volatile");
|
||
|
|
|
||
|
|
asm!("mov $0, r13" : "=r"(self.r13) : : "memory" : "intel", "volatile");
|
||
|
|
asm!("mov r13, $0" : : "r"(next.r13) : "memory" : "intel", "volatile");
|
||
|
|
|
||
|
|
asm!("mov $0, r14" : "=r"(self.r14) : : "memory" : "intel", "volatile");
|
||
|
|
asm!("mov r14, $0" : : "r"(next.r14) : "memory" : "intel", "volatile");
|
||
|
|
|
||
|
|
asm!("mov $0, r15" : "=r"(self.r15) : : "memory" : "intel", "volatile");
|
||
|
|
asm!("mov r15, $0" : : "r"(next.r15) : "memory" : "intel", "volatile");
|
||
|
|
|
||
|
|
asm!("mov $0, rbp" : "=r"(self.bp) : : "memory" : "intel", "volatile");
|
||
|
|
asm!("mov rbp, $0" : : "r"(next.bp) : "memory" : "intel", "volatile");
|
||
|
|
|
||
|
|
asm!("mov $0, rsp" : "=r"(self.sp) : : "memory" : "intel", "volatile");
|
||
|
|
asm!("mov rsp, $0" : : "r"(next.sp) : "memory" : "intel", "volatile");
|
||
|
|
|
||
|
|
/* TODO
|
||
|
|
asm!("mov $0, cr3" : "=r"(self.cr3) : : "memory" : "intel", "volatile");
|
||
|
|
asm!("mov cr3, $0" : : "r"(self.cr3) : "memory" : "intel", "volatile");
|
||
|
|
*/
|
||
|
|
}
|
||
|
|
}
|