63 lines
3.0 KiB
ArmAsm
63 lines
3.0 KiB
ArmAsm
/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
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│vi: set et ft=asm ts=8 tw=8 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/dce.h"
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#include "libc/runtime/internal.h"
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#include "libc/sysv/consts/sig.h"
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#include "libc/sysv/consts/nr.h"
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#include "libc/macros.h"
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.real
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.source __FILE__
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/ Terminates program abnormally.
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/
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/ This function first tries to trigger your SIGABRT handler. If
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/ there isn't one or execution resumes, then abort() terminates
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/ the program using an escalating variety methods of increasing
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/ brutality.
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/
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/ @forcealignargpointer
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/ @asyncsignalsafe
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/ @noreturn
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abort: push %rbp
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mov %rsp,%rbp
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and $-16,%rsp
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sub $16,%rsp
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testb IsWindows()
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jnz 2f
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mov SIG_SETMASK,%edi
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mov %rsp,%rsi
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push $0xffffffffffffffdf # all bits blocked but SIGABRT
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push $0xffffffffffffffff # assumes von neum. arithmetic
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pop 8(%rsi)
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pop (%rsi)
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xor %edx,%edx # don't care about old sigmask
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pushpop 4*4,%r10 # sizeof(sigset_t) for systemd
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mov __NR_sigprocmask,%eax # sigprocmask$sysv is hookable
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syscall
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mov __NR_getpid,%eax
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syscall
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mov %eax,%edi
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mov SIGABRT,%esi
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mov __NR_kill,%eax
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syscall # avoid hook and less bt noise
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2: mov $134,%edi # exit(128+SIGABRT) [bash-ism]
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call _Exit
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.endfn abort,globl,protected
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