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//! CPU State Operations
pub fn read_rsp() u64 {
var rsp: u64 = undefined;
asm volatile ("mov %%rsp, %[rsp]"
: [rsp] "=r" (rsp),
);
return rsp;
}
pub fn read_rbp() u64 {
var rbp: u64 = undefined;
asm volatile ("mov %%rbp, %[rbp]"
: [rbp] "=r" (rbp),
);
return rbp;
}
pub fn rdtsc() u64 {
var low: u32 = undefined;
var high: u32 = undefined;
asm volatile ("rdtsc"
: [low] "={eax}" (low),
[high] "={edx}" (high),
);
return (@as(u64, high) << 32) | low;
}
pub fn read_ds() u16 {
var ds: u16 = undefined;
asm volatile ("mov %%ds, %[ds]"
: [ds] "=r" (ds),
);
return ds;
}
pub fn read_es() u16 {
var es: u16 = undefined;
asm volatile ("mov %%es, %[es]"
: [es] "=r" (es),
);
return es;
}
pub fn read_fs() u16 {
var fs: u16 = undefined;
asm volatile ("mov %%fs, %[fs]"
: [fs] "=r" (fs),
);
return fs;
}
pub fn read_gs() u16 {
var gs: u16 = undefined;
asm volatile ("mov %%gs, %[gs]"
: [gs] "=r" (gs),
);
return gs;
}
pub fn clear_task_switched() void {
asm volatile (
\\mov %%cr0, %%rax
\\and $~8, %%rax
\\mov %%rax, %%cr0
::: .{ .rax = true });
}
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