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Perform more low-level code cleanup

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This commit is contained in:
Justine Tunney 2022-09-09 04:07:08 -07:00
parent c32e2d4486
commit 2d17ab016c
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GPG key ID: BE714B4575D6E328
42 changed files with 977 additions and 265 deletions
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41
libc/calls/setcontext.S
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@ -20,10 +20,29 @@
// Sets machine state.
//
// @note please use longerjmp() and setlongerjmp() for fibers
// @note currently only sets general registers
// @see getcontext()
setcontext:
mov 224(%rdi),%rax
test %rax,%rax
je 1f
movaps 160(%rax),%xmm0
movaps 176(%rax),%xmm1
movaps 192(%rax),%xmm2
movaps 208(%rax),%xmm3
movaps 224(%rax),%xmm4
movaps 240(%rax),%xmm5
movaps 256(%rax),%xmm6
movaps 272(%rax),%xmm7
movaps 288(%rax),%xmm8
movaps 304(%rax),%xmm9
movaps 320(%rax),%xmm10
movaps 336(%rax),%xmm11
movaps 352(%rax),%xmm12
movaps 368(%rax),%xmm13
movaps 384(%rax),%xmm14
movaps 400(%rax),%xmm15
1: push 176(%rdi)
popf
mov 40(%rdi),%r8
mov 48(%rdi),%r9
mov 56(%rdi),%r10
@ -48,6 +67,24 @@ setcontext:
.end
////////////////////////////////////////////////////////////////////////////////
noasan noubsan int setcontext(const ucontext_t *uc) {
if (uc->uc_mcontext.fpregs) {
asm volatile("movaps\t%0,%%xmm0" : /* no outputs */ : "m"(uc->uc_mcontext.fpregs->xmm[0]));
asm volatile("movaps\t%0,%%xmm1" : /* no outputs */ : "m"(uc->uc_mcontext.fpregs->xmm[1]));
asm volatile("movaps\t%0,%%xmm2" : /* no outputs */ : "m"(uc->uc_mcontext.fpregs->xmm[2]));
asm volatile("movaps\t%0,%%xmm3" : /* no outputs */ : "m"(uc->uc_mcontext.fpregs->xmm[3]));
asm volatile("movaps\t%0,%%xmm4" : /* no outputs */ : "m"(uc->uc_mcontext.fpregs->xmm[4]));
asm volatile("movaps\t%0,%%xmm5" : /* no outputs */ : "m"(uc->uc_mcontext.fpregs->xmm[5]));
asm volatile("movaps\t%0,%%xmm6" : /* no outputs */ : "m"(uc->uc_mcontext.fpregs->xmm[6]));
asm volatile("movaps\t%0,%%xmm7" : /* no outputs */ : "m"(uc->uc_mcontext.fpregs->xmm[7]));
asm volatile("movaps\t%0,%%xmm8" : /* no outputs */ : "m"(uc->uc_mcontext.fpregs->xmm[8]));
asm volatile("movaps\t%0,%%xmm9" : /* no outputs */ : "m"(uc->uc_mcontext.fpregs->xmm[9]));
asm volatile("movaps\t%0,%%xmm10" : /* no outputs */ : "m"(uc->uc_mcontext.fpregs->xmm[10]));
asm volatile("movaps\t%0,%%xmm11" : /* no outputs */ : "m"(uc->uc_mcontext.fpregs->xmm[11]));
asm volatile("movaps\t%0,%%xmm12" : /* no outputs */ : "m"(uc->uc_mcontext.fpregs->xmm[12]));
asm volatile("movaps\t%0,%%xmm13" : /* no outputs */ : "m"(uc->uc_mcontext.fpregs->xmm[13]));
asm volatile("movaps\t%0,%%xmm14" : /* no outputs */ : "m"(uc->uc_mcontext.fpregs->xmm[14]));
asm volatile("movaps\t%0,%%xmm15" : /* no outputs */ : "m"(uc->uc_mcontext.fpregs->xmm[15]));
}
asm volatile("mov\t%0,%%r8" : /* no outputs */ : "m"(uc->uc_mcontext.r8));
asm volatile("mov\t%0,%%r9" : /* no outputs */ : "m"(uc->uc_mcontext.r9));
asm volatile("mov\t%0,%%r10" : /* no outputs */ : "m"(uc->uc_mcontext.r10));