46 lines
993 B
C
46 lines
993 B
C
/*
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* Copyright (c) 2018 William Pitcock <nenolod@dereferenced.org>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* This software is provided 'as is' and without any warranty, express or
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* implied. In no event shall the authors be liable for any damages arising
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* from the use of this software.
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*/
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#define _GNU_SOURCE
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#include <stddef.h>
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#include <stdarg.h>
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#include <signal.h>
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#include <string.h>
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#include <stdint.h>
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#include <errno.h>
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#include <unistd.h>
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#include <sys/syscall.h>
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int
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__getcontext(ucontext_t *ucp)
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{
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#ifdef SYS_swapcontext
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int r;
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r = syscall(SYS_swapcontext, ucp, NULL, sizeof(ucontext_t));
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if (r < 0)
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{
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errno = -r;
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return -1;
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}
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return 0;
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#else
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errno = ENOSYS;
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return -1;
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#endif
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}
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extern __typeof(__getcontext) getcontext __attribute__((weak, __alias__("__getcontext")));
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