e83f7ba2c9
. file- and functionality-compatible with previous situation
(FreeBSD csu) (with a crt1.o -> crt0.o symlink in /usr/lib)
. harmonizes source with netbsd
. harmonizes linker invocation (e.g. clang) with netbsd
. helpful to get some arm code in there for the arm port project
110 lines
3.4 KiB
C
110 lines
3.4 KiB
C
/* $NetBSD: crt0.c,v 1.7 2008/06/21 00:52:52 gmcgarry Exp $ */
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/*
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* Copyright (C) 1997 Mark Brinicombe
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* Copyright (C) 1995 Wolfgang Solfrank.
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* Copyright (C) 1995 TooLs GmbH.
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* All rights reserved.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by TooLs GmbH.
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* 4. The name of TooLs GmbH may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#include <sys/param.h>
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#include <machine/asm.h>
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#include <stdlib.h>
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#include "common.h"
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extern void _start(void);
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void ___start(int, char *[], char *[], struct ps_strings *,
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const Obj_Entry *, void (*)(void));
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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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" .globl __start \n"
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"_start: \n"
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"__start: \n"
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" mov r5, r2 /* cleanup */ \n"
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" mov r4, r1 /* obj_main */ \n"
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" mov r3, r0 /* ps_strings */ \n"
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" /* Get argc, argv, and envp from stack */ \n"
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" ldr r0, [sp, #0x0000] \n"
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" add r1, sp, #0x0004 \n"
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" add r2, r1, r0, lsl #2 \n"
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" add r2, r2, #0x0004 \n"
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"\n"
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" /* Ensure the stack is properly aligned before calling C code. */\n"
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" bic sp, sp, #" ___STRING(STACKALIGNBYTES) " \n"
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" sub sp, sp, #8 \n"
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" str r5, [sp, #4] \n"
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" str r4, [sp, #0] \n"
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"\n"
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" b " ___STRING(_C_LABEL(___start)) " ");
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: crt0.c,v 1.7 2008/06/21 00:52:52 gmcgarry Exp $");
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#endif /* LIBC_SCCS and not lint */
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void
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___start(int argc, char **argv, char **envp, struct ps_strings *ps_strings,
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const Obj_Entry *obj, void (*cleanup)(void))
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{
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char *ap;
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environ = envp;
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__ps_strings = ps_strings;
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if ((ap = argv[0])) {
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if ((__progname = _strrchr(ap, '/')) == NULL)
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__progname = ap;
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else
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++__progname;
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}
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#ifdef DYNAMIC
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/* ld(1) convention: if DYNAMIC = 0 then statically linked */
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if (&_DYNAMIC)
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_rtld_setup(cleanup, obj);
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#endif /* DYNAMIC */
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#ifdef MCRT0
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atexit(_mcleanup);
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monstartup((u_long)&_eprol, (u_long)&_etext);
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#endif /* MCRT0 */
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atexit(_fini);
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_init();
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__asm("__callmain:"); /* Defined for the benefit of debuggers */
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exit(main(argc, argv, envp));
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}
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#include "common.c"
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