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Fix sigsuspend() and sigprocmask() on OpenBSD

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Test reliability is now iron clad.
This commit is contained in:
Justine Tunney 2021-02-05 12:19:43 -08:00
parent b2cd58a322
commit a91ba89d85
12 changed files with 148 additions and 13 deletions
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46
libc/calls/thunks/sigprocmask-sysv.S Normal file
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/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
│vi: set et ft=asm ts=8 tw=8 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2021 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/dce.h"
#include "libc/macros.h"
/ Sets System Five process signal mask w/ standard ABI.
sys_sigprocmask:
push %rbp
mov %rsp,%rbp
#if SupportsOpenbsd()
testb IsOpenbsd()
jz 4f
test %rsi,%rsi
jnz 1f
mov $1,%edi # SIG_BLOCK on BSDs
jmp 2f
1: mov (%rsi),%esi # openbsd:byvalue
2: call __sys_sigprocmask
cmp $-1,%eax
je 5f
test %rdx,%rdx # original param not a result
jz 3f
mov %eax,(%rdx) # openbsd:byvalue
3: xor %eax,%eax
jmp 5f
#endif
4: call __sys_sigprocmask
5: pop %rbp
ret
.endfn sys_sigprocmask,globl

34
libc/calls/thunks/sigsuspend-sysv.S Normal file
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/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
│vi: set et ft=asm ts=8 tw=8 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2021 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/dce.h"
#include "libc/macros.h"
/ Pauses process w/ standard ABI.
sys_sigsuspend:
push %rbp
mov %rsp,%rbp
#if SupportsOpenbsd()
testb IsOpenbsd()
jz 1f
mov (%rdi),%edi # openbsd:byvalue
#endif
1: call __sys_sigsuspend
pop %rbp
ret
.endfn sys_sigsuspend,globl