forked from ariadne/libucontext
46 lines
1021 B
C
46 lines
1021 B
C
/*
|
|
* Copyright (c) 2018 William Pitcock <nenolod@dereferenced.org>
|
|
*
|
|
* 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.
|
|
*
|
|
* This software is provided 'as is' and without any warranty, express or
|
|
* implied. In no event shall the authors be liable for any damages arising
|
|
* from the use of this software.
|
|
*/
|
|
|
|
#define _GNU_SOURCE
|
|
#include <stddef.h>
|
|
#include <stdarg.h>
|
|
#include <signal.h>
|
|
#include <string.h>
|
|
#include <stdint.h>
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
#include <sys/syscall.h>
|
|
|
|
|
|
int
|
|
__swapcontext(ucontext_t *oucp, const ucontext_t *ucp)
|
|
{
|
|
#ifdef SYS_swapcontext
|
|
int r;
|
|
|
|
r = syscall(SYS_swapcontext, oucp, ucp, sizeof(ucontext_t));
|
|
if (r < 0)
|
|
{
|
|
errno = -r;
|
|
return -1;
|
|
}
|
|
|
|
return r;
|
|
#else
|
|
errno = ENOSYS;
|
|
return -1;
|
|
#endif
|
|
}
|
|
|
|
|
|
extern __typeof(__swapcontext) swapcontext __attribute__((weak, __alias__("__swapcontext")));
|