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author | Roland McGrath <roland@hack.frob.com> | 2012-10-01 12:55:34 -0700 |
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committer | Roland McGrath <roland@hack.frob.com> | 2012-10-01 12:55:34 -0700 |
commit | 93c65d438497842a42fe4f6a8af272d20a143025 (patch) | |
tree | 112d49bebbc46a568d5e8f4fb074c87a9d80f736 /csu/init-first.c | |
parent | 55a051c985c3e7965a2f5dd5f762ac2737adae01 (diff) | |
download | glibc-93c65d438497842a42fe4f6a8af272d20a143025.zip glibc-93c65d438497842a42fe4f6a8af272d20a143025.tar.gz glibc-93c65d438497842a42fe4f6a8af272d20a143025.tar.bz2 |
Clean up init-first.c files.
Diffstat (limited to 'csu/init-first.c')
-rw-r--r-- | csu/init-first.c | 89 |
1 files changed, 71 insertions, 18 deletions
diff --git a/csu/init-first.c b/csu/init-first.c index 050959d..0cfabbc 100644 --- a/csu/init-first.c +++ b/csu/init-first.c @@ -1,4 +1,4 @@ -/* Initialization code run first thing by the ELF startup code. Stub version. +/* Initialization code run first thing by the ELF startup code. Common version Copyright (C) 1995-2012 Free Software Foundation, Inc. This file is part of the GNU C Library. @@ -17,40 +17,76 @@ <http://www.gnu.org/licenses/>. */ #include <ctype.h> +#include <stdio.h> +#include <stdlib.h> +#include <fcntl.h> #include <unistd.h> +#include <sysdep.h> +#include <fpu_control.h> +#include <sys/param.h> #include <sys/types.h> +#include <libc-internal.h> + +#include <ldsodefs.h> /* Set nonzero if we have to be prepared for more then one libc being used in the process. Safe assumption if initializer never runs. */ int __libc_multiple_libcs attribute_hidden = 1; -extern void __libc_init (int, char **, char **); -#ifdef USE_NONOPTION_FLAGS -extern void __getopt_clean_environment (char **); -#endif +/* Remember the command line argument and enviroment contents for + later calls of initializers for dynamic libraries. */ +int __libc_argc attribute_hidden; +char **__libc_argv attribute_hidden; + -#ifdef SHARED void -__libc_init_first (void) +__libc_init_first (int argc, char **argv, char **envp) { +#ifdef SHARED + /* For DSOs we do not need __libc_init_first but instead _init. */ } + +void +attribute_hidden +_init (int argc, char **argv, char **envp) +{ +#endif +#ifdef USE_NONOPTION_FLAGS + extern void __getopt_clean_environment (char **); #endif + __libc_multiple_libcs = &_dl_starting_up && !_dl_starting_up; + + /* Make sure we don't initialize twice. */ + if (!__libc_multiple_libcs) + { + /* Set the FPU control word to the proper default value if the + kernel would use a different value. (In a static program we + don't have this information.) */ #ifdef SHARED -/* 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 -#else -void __libc_init_first + if (__fpu_control != GLRO(dl_fpu_control)) #endif -(int argc, char *arg0, ...) -{ - char **argv = &arg0, **envp = &argv[argc + 1]; + __setfpucw (__fpu_control); + } + /* Save the command-line arguments. */ + __libc_argc = argc; + __libc_argv = argv; __environ = envp; - __libc_init (argc, argv, envp); + +#ifndef SHARED + __libc_init_secure (); + + /* First the initialization which normally would be done by the + dynamic linker. */ + _dl_non_dynamic_init (); +#endif + +#ifdef VDSO_SETUP + VDSO_SETUP (); +#endif + + __init_misc (argc, argv, envp); #ifdef USE_NONOPTION_FLAGS /* This is a hack to make the special getopt in GNU libc working. */ @@ -59,4 +95,21 @@ void __libc_init_first /* Initialize ctype data. */ __ctype_init (); + +#if defined SHARED && !defined NO_CTORS_DTORS_SECTIONS + __libc_global_ctors (); +#endif +} + +/* This function is defined here so that if this file ever gets into + ld.so we will get a link error. Having this file silently included + in ld.so causes disaster, because the _init definition above will + cause ld.so to gain an init function, which is not a cool thing. */ + +extern void _dl_start (void) __attribute__ ((noreturn)); + +void +_dl_start (void) +{ + abort (); } |