freebsd-dev/lib/csu/amd64/crt1.c
Konstantin Belousov bdafb02fcb Process irelocs for statically linked binaries from crt1 on x86.
This makes statically linked binaries with ifuncs operational.

Reported and tested by:	mjg
Reviewed by:	emaste, markj
Sponsored by:	The FreeBSD Foundation
Approved by:	re (rgrimes)
Differential revision:	https://reviews.freebsd.org/D17363
2018-10-13 23:52:55 +00:00

78 lines
2.1 KiB
C

/* LINTLIBRARY */
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright 1996-1998 John D. Polstra.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <stdlib.h>
#include "libc_private.h"
#include "crtbrand.c"
#include "ignore_init.c"
typedef void (*fptr)(void);
#ifdef GCRT
extern void _mcleanup(void);
extern void monstartup(void *, void *);
extern int eprol;
extern int etext;
#endif
void _start(char **, void (*)(void));
/* The entry function. */
void
_start(char **ap, void (*cleanup)(void))
{
int argc;
char **argv;
char **env;
argc = *(long *)(void *)ap;
argv = ap + 1;
env = ap + 2 + argc;
handle_argv(argc, argv, env);
if (&_DYNAMIC != NULL) {
atexit(cleanup);
} else {
process_irelocs();
_init_tls();
}
#ifdef GCRT
atexit(_mcleanup);
monstartup(&eprol, &etext);
__asm__("eprol:");
#endif
handle_static_init(argc, argv, env);
exit(main(argc, argv, env));
}