47 lines
2.3 KiB
ArmAsm
47 lines
2.3 KiB
ArmAsm
/*-*- 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
|