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35 lines
2.3 KiB
C
35 lines
2.3 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2022 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/assert.h"
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#include "libc/calls/struct/sigset.h"
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#include "libc/runtime/runtime.h"
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#include "libc/sysv/consts/sig.h"
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#ifdef __x86_64__
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// kudos rich felker for the brilliant design
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_Hide int __sigsetjmp_tail(sigjmp_buf jb, int rc) {
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_Static_assert(
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sizeof(sigjmp_buf) == sizeof(jmp_buf) + 8 + 8 + sizeof(sigset_t),
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"please recompute sigjmp_buf w.r.t. sigset_t");
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void *p = (char *)jb + sizeof(jmp_buf) + 8 + 8;
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_npassert(!sigprocmask(SIG_SETMASK, rc ? p : 0, rc ? 0 : p));
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return rc;
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}
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#endif /* __x86_64__ */
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