diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/i386/init-first.c')
-rw-r--r-- | sysdeps/unix/sysv/linux/i386/init-first.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/init-first.c b/sysdeps/unix/sysv/linux/i386/init-first.c new file mode 100644 index 0000000000..0177daae24 --- /dev/null +++ b/sysdeps/unix/sysv/linux/i386/init-first.c @@ -0,0 +1,72 @@ +/* Initialization code run first thing by the ELF startup code. i386/Linux +Copyright (C) 1995 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., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include <unistd.h> +#include "fpu_control.h" + +extern void __libc_init (int, char **, char **); +extern void __libc_global_ctors (void); + + +static void +init (int *data) +{ + int argc = *data; + char **argv = (void *) (data + 1); + char **envp = &argv[argc + 1]; + + /* Make sure we are not using iBSC2 personality. */ + asm ("int $0x80 # syscall no %0, arg %1" + : : "a" (SYS_ify (personality)), "b" (0)); + + /* Set the FPU control word to the proper default value. */ + __setfpucw (___fpu_control); + + __environ = envp; + __libc_init (argc, argv, envp); +} + +#ifdef PIC +/* This function is called to initialize the shared C library. + It is called just before the user _start code from i386/elf/start.S, + with the stack set up as that code gets it. */ + +/* NOTE! The linker notices the magical name `_init' and sets the DT_INIT + pointer in the dynamic section based solely on that. It is convention + for this function to be in the `.init' section, but the symbol name is + the only thing that really matters!! */ +/*void _init (int argc, ...) __attribute__ ((unused, section (".init")));*/ + +void +_init (int argc, ...) +{ + init (&argc); + + __libc_global_ctors (); +} +#endif + + +void +__libc_init_first (int argc __attribute__ ((unused)), ...) +{ +#ifndef PIC + init (&argc); +#endif +} |