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Introduce cosmo_futex_wait and cosmo_futex_wake

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Cosmopolitan Futexes are now exposed as a public API.
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Justine Tunney 2024-11-22 11:08:29 -08:00
parent 729f7045e3
commit 9ddbfd921e
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66 changed files with 886 additions and 917 deletions
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libc/intrin/restore.S Normal file
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/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
│ vi: set noet ft=asm ts=8 sw=8 fenc=utf-8 :vi │
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2023 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/macros.h"
.text.windows
// Restores thread to state before signal.
//
// @param rdi points to ucontext_t with machine state
// @noreturn
__sig_restore:
// restore vector registers
lea 608(%rdi),%rax
movaps -0x80(%rax),%xmm0
movaps -0x70(%rax),%xmm1
movaps -0x60(%rax),%xmm2
movaps -0x50(%rax),%xmm3
movaps -0x40(%rax),%xmm4
movaps -0x30(%rax),%xmm5
movaps -0x20(%rax),%xmm6
movaps -0x10(%rax),%xmm7
movaps 0x00(%rax),%xmm8
movaps 0x10(%rax),%xmm9
movaps 0x20(%rax),%xmm10
movaps 0x30(%rax),%xmm11
movaps 0x40(%rax),%xmm12
movaps 0x50(%rax),%xmm13
movaps 0x60(%rax),%xmm14
movaps 0x70(%rax),%xmm15
// restore general registers
lea 80(%rdi),%rax
mov -40(%rax),%r8
mov -32(%rax),%r9
mov -24(%rax),%r10
mov -16(%rax),%r11
mov -8(%rax),%r12
mov 0(%rax),%r13
mov 8(%rax),%r14
mov 16(%rax),%r15
mov 24(%rax),%rdi
mov 32(%rax),%rsi
mov 48(%rax),%rbx
mov 56(%rax),%rdx
mov 72(%rax),%rcx
mov 40(%rax),%rbp
mov 80(%rax),%rsp
// this clobbers the red zone
push 88(%rax) // rip
push 64(%rax) // rax
push 96(%rax) // flags
popf
pop %rax
ret
.endfn __sig_restore,globl