diff options
Diffstat (limited to 'sysdeps/powerpc/elf/libc-start.c')
| -rw-r--r-- | sysdeps/powerpc/elf/libc-start.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/sysdeps/powerpc/elf/libc-start.c b/sysdeps/powerpc/elf/libc-start.c new file mode 100644 index 0000000000..535eab2a64 --- /dev/null +++ b/sysdeps/powerpc/elf/libc-start.c @@ -0,0 +1,100 @@ +/* Copyright (C) 1998 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <stdlib.h> +#include <unistd.h> +#include <elf/ldsodefs.h> + +extern void __libc_init_first (int argc, char **argv, char **envp); + +extern int _dl_starting_up; +weak_extern (_dl_starting_up) +extern int __libc_multiple_libcs; + +struct startup_info +{ + void *sda_base; + int (*main) (int, char **, char **, void *); + int (*init) (int, char **, char **, void *); + void (*fini) (void); +}; + +int +__libc_start_main (int argc, char **argv, char **envp, + void *auxvec, void (*rtld_fini) (void), + struct startup_info *stinfo, + char **stack_on_entry) +{ +#ifndef PIC + /* The next variable is only here to work around a bug in gcc <= 2.7.2.2. + If the address would be taken inside the expression the optimizer + would try to be too smart and throws it away. Grrr. */ + int *dummy_addr = &_dl_starting_up; + + __libc_multiple_libcs = dummy_addr && !_dl_starting_up; +#endif + + /* the PPC SVR4 ABI says that the top thing on the stack will + be a NULL pointer, so if not we assume that we're being called + as a statically-linked program by Linux... */ + if (*stack_on_entry != NULL) + { + /* ...in which case, we have argc as the top thing on the + stack, followed by argv (NULL-terminated), envp (likewise), + and the auxilary vector. */ + argc = *(int *) stack_on_entry; + argv = stack_on_entry + 1; + envp = argv + argc + 1; + auxvec = envp; + while (*(char **) auxvec != NULL) + ++auxvec; + ++auxvec; + rtld_fini = NULL; + } + + /* Register the destructor of the dynamic linker if there is any. */ + if (rtld_fini != NULL) + atexit (rtld_fini); + + /* Set the global _environ variable correctly. */ + __environ = envp; + + /* Call the initializer of the libc. */ +#ifdef PIC + if (_dl_debug_impcalls) + _dl_debug_message (1, "\ninitialize libc\n\n", NULL); +#endif + __libc_init_first (argc, argv, envp); + + /* Call the initializer of the program. */ +#ifdef PIC + if (_dl_debug_impcalls) + _dl_debug_message (1, "\ninitialize program: ", argv[0], "\n\n", NULL); +#endif + stinfo->init (argc, argv, __environ, auxvec); + + /* Register the destructor of the program. */ + atexit (stinfo->fini); + +#ifdef PIC + if (_dl_debug_impcalls) + _dl_debug_message (1, "\ntransferring control: ", argv[0], "\n\n", NULL); +#endif + + exit (stinfo->main (argc, argv, __environ, auxvec)); +} |