2020-06-16 13:38:43 +00:00
|
|
|
/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
|
2020-06-15 14:18:57 +00:00
|
|
|
│vi: set et ft=asm ts=8 tw=8 fenc=utf-8 :vi│
|
|
|
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
|
|
|
│ Copyright 2020 Justine Alexandra Roberts Tunney │
|
|
|
|
|
│ │
|
2020-12-28 01:18:44 +00:00
|
|
|
│ 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. │
|
2020-06-15 14:18:57 +00:00
|
|
|
│ │
|
2020-12-28 01:18:44 +00:00
|
|
|
│ 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. │
|
2020-06-15 14:18:57 +00:00
|
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
|
|
|
#include "libc/calls/internal.h"
|
|
|
|
|
#include "libc/macros.h"
|
2020-06-16 02:01:28 +00:00
|
|
|
.source __FILE__
|
2020-06-15 14:18:57 +00:00
|
|
|
|
|
|
|
|
/ System Five signal handler.
|
|
|
|
|
/
|
|
|
|
|
/ This is needed because (1) a signal is allowed to trigger at
|
|
|
|
|
/ just about any time, and leaf functions (e.g. memcpy) aren't
|
|
|
|
|
/ required to leave Cosmopolitan's image base register alone.
|
|
|
|
|
/
|
|
|
|
|
/ @param %edi is the signal number
|
|
|
|
|
/ @param %rsi will be passed for sigactions
|
|
|
|
|
/ @param %rdx will be passed for sigactions
|
|
|
|
|
/ @return true if handler was invoked
|
|
|
|
|
__sigenter:
|
|
|
|
|
push %rbp
|
|
|
|
|
mov %rsp,%rbp
|
|
|
|
|
.profilable
|
|
|
|
|
and $NSIG-1,%edi
|
2020-12-19 19:21:04 +00:00
|
|
|
mov g_sighandrvas(,%rdi,4),%eax
|
2020-06-15 14:18:57 +00:00
|
|
|
cmp $kSigactionMinRva,%eax
|
|
|
|
|
jl 2f
|
2020-12-19 19:21:04 +00:00
|
|
|
lea _base(%rax),%eax
|
2020-06-15 14:18:57 +00:00
|
|
|
call *%rax
|
|
|
|
|
mov $1,%eax
|
2020-12-19 19:21:04 +00:00
|
|
|
1: leave
|
2020-06-15 14:18:57 +00:00
|
|
|
ret
|
|
|
|
|
2: xor %eax,%eax
|
|
|
|
|
jmp 1b
|
|
|
|
|
.endfn __sigenter,globl,hidden
|
