| /* Copyright (C) 1992, 1993, 1994, 1995, 1997 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 Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| In addition to the permissions in the GNU Lesser General Public |
| License, the Free Software Foundation gives you unlimited |
| permission to link the compiled version of this file with other |
| programs, and to distribute those programs without any restriction |
| coming from the use of this file. (The GNU Lesser General Public |
| License restrictions do apply in other respects; for example, they |
| cover modification of the file, and distribution when not linked |
| into another program.) |
| |
| Note that people who make modified versions of this file are not |
| obligated to grant this special exception for their modified |
| versions; it is their choice whether to do so. The GNU Lesser |
| General Public License gives permission to release a modified |
| version without this exception; this exception also makes it |
| possible to release a modified version which carries forward this |
| exception. |
| |
| 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 |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #include <stddef.h> |
| #include <stdlib.h> |
| #include <errno.h> |
| #include <unistd.h> |
| #include <sysdep.h> |
| |
| #ifndef __GNUC__ |
| #error This file uses GNU C extensions; you must compile with GCC. |
| #endif |
| |
| /* The first piece of initialized data. */ |
| int __data_start = 0; |
| |
| #ifndef _HURD_THREADVAR_H |
| volatile int errno; |
| #endif |
| |
| extern void __mach_init (void); |
| extern void __libc_init (int argc, char **argv, char **envp); |
| extern int main (int argc, char **argv, char **envp); |
| |
| /* These are uninitialized common definitions so they will be zero |
| by default. If the user links in C threads, that will provide initialized |
| definitions that override these. */ |
| void *(*_cthread_init_routine) (void); /* Returns new SP to use. */ |
| void (*_cthread_exit_routine) (int status); |
| |
| |
| /* These are for communication from _start to start1, |
| where we cannot use the stack for anything. */ |
| static int start_argc; |
| static char **start_argv; |
| |
| /* _start calls this on the new stack. */ |
| static volatile void |
| start1 (void) |
| { |
| __libc_init (start_argc, start_argv, __environ); |
| |
| (_cthread_exit_routine != NULL ? *_cthread_exit_routine : exit) |
| (main (start_argc, start_argv, __environ)); |
| |
| /* Should never get here. */ |
| LOSE; |
| } |
| |
| #ifndef START_ARGS |
| #define START_ARGS void |
| #endif |
| #ifdef START_MACHDEP |
| START_MACHDEP |
| #define _start _start0 |
| #endif |
| |
| void |
| _start (START_ARGS) |
| { |
| SNARF_ARGS (start_argc, start_argv, __environ); |
| |
| __mach_init (); |
| |
| if (_cthread_init_routine != NULL) |
| CALL_WITH_SP (start1, (*_cthread_init_routine) ()); |
| else |
| start1 (); |
| |
| /* Should never get here. */ |
| LOSE; |
| } |