65706c12b2
When enough time has passed for users to update their userland the kernel fix will be applied. This will change the ABI to have x0 point to the args and sp be correctly aligned. It is expected this compatibility code can be removed when the kernel and qemu usermode emulation have both been updated for the new ABI. This fixes clang failures, and most likely other crashes. Obtained from: ABT Systems Ltd Sponsored by: The FreeBSD Foundation
94 lines
2.8 KiB
C
94 lines
2.8 KiB
C
/* LINTLIBRARY */
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/*-
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* Copyright 1996-1998 John D. Polstra.
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* Copyright 2014 Andrew Turner.
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* Copyright 2014-2015 The FreeBSD Foundation.
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* All rights reserved.
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*
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* Portions of this software were developed by Andrew Turner
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* under sponsorship from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#ifndef lint
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#ifndef __GNUC__
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#error "GCC is needed to compile this file"
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#endif
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#endif /* lint */
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#include <stdlib.h>
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#include "libc_private.h"
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#include "crtbrand.c"
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#include "ignore_init.c"
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#ifdef GCRT
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extern void _mcleanup(void);
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extern void monstartup(void *, void *);
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extern int eprol;
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extern int etext;
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#endif
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void __start(int, char **, char **, void (*)(void));
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/* The entry function. */
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__asm(" .text \n"
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" .align 0 \n"
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" .globl _start \n"
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" _start: \n"
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/* TODO: Remove this when the kernel correctly aligns the stack */
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" cbnz x0, 1f \n" /* Are we using a new kernel? */
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" mov x0, sp \n" /* No, load the args from sp */
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" and sp, x0, #~0xf \n" /* And align the stack */
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"1: mov x3, x2 \n" /* cleanup */
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" add x1, x0, #8 \n" /* load argv */
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" ldr x0, [x0] \n" /* load argc */
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" add x2, x1, x0, lsl #3 \n" /* env is after argv */
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" add x2, x2, #8 \n" /* argv is null terminated */
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" b __start ");
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/* The entry function. */
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void
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__start(int argc, char *argv[], char *env[], void (*cleanup)(void))
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{
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handle_argv(argc, argv, env);
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if (&_DYNAMIC != NULL)
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atexit(cleanup);
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else
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_init_tls();
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#ifdef GCRT
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atexit(_mcleanup);
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monstartup(&eprol, &etext);
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__asm__("eprol:");
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#endif
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handle_static_init(argc, argv, env);
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exit(main(argc, argv, env));
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}
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