81 lines
2.5 KiB
C
81 lines
2.5 KiB
C
/* Special startup code for ARM a.out binaries.
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Copyright (C) 1998 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <errno.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sysdep.h>
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/* The first piece of initialized data. */
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int __data_start = 0;
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#ifdef HAVE_WEAK_SYMBOLS
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weak_alias (__data_start, data_start)
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#endif
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extern void __libc_init __P ((int argc, char **argv, char **envp));
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extern int main __P ((int argc, char **argv, char **envp));
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/* N.B.: It is important that this be the first function.
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This file is the first thing in the text section. */
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/* If this was in C it might create its own stack frame and
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screw up the arguments. */
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#ifdef NO_UNDERSCORES
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asm (".text; .globl _start; _start: B start1");
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#else
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asm (".text; .globl __start; __start: B _start1");
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/* Make an alias called `start' (no leading underscore, so it can't
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conflict with C symbols) for `_start'. This is the name vendor crt0.o's
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tend to use, and thus the name most linkers expect. */
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asm (".set start, __start");
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#endif
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/* Fool gcc into thinking that more args are passed. This makes it look
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on the stack (correctly) for the real arguments. It causes somewhat
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strange register usage in start1(), but we aren't too bothered about
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that at the moment. */
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#define DUMMIES a1, a2, a3, a4
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#ifdef DUMMIES
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#define ARG_DUMMIES DUMMIES,
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#define DECL_DUMMIES int DUMMIES;
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#else
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#define ARG_DUMMIES
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#define DECL_DUMMIES
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#endif
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/* ARGSUSED */
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static void
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start1 (ARG_DUMMIES argc, argv, envp)
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DECL_DUMMIES
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int argc;
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char **argv;
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char **envp;
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{
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/* Store a pointer to the environment. */
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__environ = envp;
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/* Do C library initializations. */
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__libc_init (argc, argv, __environ);
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/* Call the user program. */
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exit (main (argc, argv, __environ));
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}
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