diff options
Diffstat (limited to 'csu/libc-start.c')
| -rw-r--r-- | csu/libc-start.c | 263 |
1 files changed, 0 insertions, 263 deletions
diff --git a/csu/libc-start.c b/csu/libc-start.c deleted file mode 100644 index 194db6b1ec..0000000000 --- a/csu/libc-start.c +++ /dev/null @@ -1,263 +0,0 @@ -/* Copyright (C) 1998-2003, 2004, 2005 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. - - 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 <stdlib.h> -#include <stdio.h> -#include <unistd.h> -#include <ldsodefs.h> -#include <bp-start.h> -#include <bp-sym.h> - -extern void __libc_init_first (int argc, char **argv, char **envp); - -extern int __libc_multiple_libcs; - -#include <tls.h> -#ifndef SHARED -# include <dl-osinfo.h> -extern void __pthread_initialize_minimal (void) -# if !(USE_TLS - 0) && !defined NONTLS_INIT_TP - __attribute__ ((weak)) -# endif - ; -# ifndef THREAD_SET_STACK_GUARD -/* Only exported for architectures that don't store the stack guard canary - in thread local area. */ -uintptr_t __stack_chk_guard attribute_relro; -# endif -#endif - -#ifdef HAVE_PTR_NTHREADS -/* We need atomic operations. */ -# include <atomic.h> -#endif - - -#ifdef LIBC_START_MAIN -# ifdef LIBC_START_DISABLE_INLINE -# define STATIC static -# else -# define STATIC static inline __attribute__ ((always_inline)) -# endif -#else -# define STATIC -# define LIBC_START_MAIN BP_SYM (__libc_start_main) -#endif - -#ifdef MAIN_AUXVEC_ARG -/* main gets passed a pointer to the auxiliary. */ -# define MAIN_AUXVEC_DECL , void * -# define MAIN_AUXVEC_PARAM , auxvec -#else -# define MAIN_AUXVEC_DECL -# define MAIN_AUXVEC_PARAM -#endif - -STATIC int LIBC_START_MAIN (int (*main) (int, char **, char ** - MAIN_AUXVEC_DECL), - int argc, - char *__unbounded *__unbounded ubp_av, -#ifdef LIBC_START_MAIN_AUXVEC_ARG - ElfW(auxv_t) *__unbounded auxvec, -#endif - __typeof (main) init, - void (*fini) (void), - void (*rtld_fini) (void), - void *__unbounded stack_end) - __attribute__ ((noreturn)); - - -/* Note: the fini parameter is ignored here for shared library. It - is registered with __cxa_atexit. This had the disadvantage that - finalizers were called in more than one place. */ -STATIC int -LIBC_START_MAIN (int (*main) (int, char **, char ** MAIN_AUXVEC_DECL), - int argc, char *__unbounded *__unbounded ubp_av, -#ifdef LIBC_START_MAIN_AUXVEC_ARG - ElfW(auxv_t) *__unbounded auxvec, -#endif - __typeof (main) init, - void (*fini) (void), - void (*rtld_fini) (void), void *__unbounded stack_end) -{ -#if __BOUNDED_POINTERS__ - char **argv; -#else -# define argv ubp_av -#endif - - /* Result of the 'main' function. */ - int result; - - __libc_multiple_libcs = &_dl_starting_up && !_dl_starting_up; - -#ifndef SHARED - char *__unbounded *__unbounded ubp_ev = &ubp_av[argc + 1]; - - INIT_ARGV_and_ENVIRON; - - /* Store the lowest stack address. This is done in ld.so if this is - the code for the DSO. */ - __libc_stack_end = stack_end; - -# ifdef HAVE_AUX_VECTOR - /* First process the auxiliary vector since we need to find the - program header to locate an eventually present PT_TLS entry. */ -# ifndef LIBC_START_MAIN_AUXVEC_ARG - ElfW(auxv_t) *__unbounded auxvec; - { - char *__unbounded *__unbounded evp = ubp_ev; - while (*evp++ != NULL) - ; - auxvec = (ElfW(auxv_t) *__unbounded) evp; - } -# endif - _dl_aux_init (auxvec); -# endif -# ifdef DL_SYSDEP_OSCHECK - if (!__libc_multiple_libcs) - { - /* This needs to run to initiliaze _dl_osversion before TLS - setup might check it. */ - DL_SYSDEP_OSCHECK (__libc_fatal); - } -# endif - - /* Initialize the thread library at least a bit since the libgcc - functions are using thread functions if these are available and - we need to setup errno. If there is no thread library and we - handle TLS the function is defined in the libc to initialized the - TLS handling. */ -# if !(USE_TLS - 0) && !defined NONTLS_INIT_TP - if (__pthread_initialize_minimal) -# endif - __pthread_initialize_minimal (); -#endif - -# ifndef SHARED - /* Set up the stack checker's canary. */ - uintptr_t stack_chk_guard = _dl_setup_stack_chk_guard (); -# ifdef THREAD_SET_STACK_GUARD - THREAD_SET_STACK_GUARD (stack_chk_guard); -# else - __stack_chk_guard = stack_chk_guard; -# endif -#endif - - /* Register the destructor of the dynamic linker if there is any. */ - if (__builtin_expect (rtld_fini != NULL, 1)) - __cxa_atexit ((void (*) (void *)) rtld_fini, NULL, NULL); - -#ifndef SHARED - /* Call the initializer of the libc. This is only needed here if we - are compiling for the static library in which case we haven't - run the constructors in `_dl_start_user'. */ - __libc_init_first (argc, argv, __environ); - - /* Register the destructor of the program, if any. */ - if (fini) - __cxa_atexit ((void (*) (void *)) fini, NULL, NULL); - - /* Some security at this point. Prevent starting a SUID binary where - the standard file descriptors are not opened. We have to do this - only for statically linked applications since otherwise the dynamic - loader did the work already. */ - if (__builtin_expect (__libc_enable_secure, 0)) - __libc_check_standard_fds (); -#endif - - /* Call the initializer of the program, if any. */ -#ifdef SHARED - if (__builtin_expect (GLRO(dl_debug_mask) & DL_DEBUG_IMPCALLS, 0)) - GLRO(dl_debug_printf) ("\ninitialize program: %s\n\n", argv[0]); -#endif - if (init) - (*init) (argc, argv, __environ MAIN_AUXVEC_PARAM); - -#ifdef SHARED - /* Auditing checkpoint: we have a new object. */ - if (__builtin_expect (GLRO(dl_naudit) > 0, 0)) - { - struct audit_ifaces *afct = GLRO(dl_audit); - struct link_map *head = GL(dl_ns)[LM_ID_BASE]._ns_loaded; - for (unsigned int cnt = 0; cnt < GLRO(dl_naudit); ++cnt) - { - if (afct->preinit != NULL) - afct->preinit (&head->l_audit[cnt].cookie); - - afct = afct->next; - } - } -#endif - -#ifdef SHARED - if (__builtin_expect (GLRO(dl_debug_mask) & DL_DEBUG_IMPCALLS, 0)) - GLRO(dl_debug_printf) ("\ntransferring control: %s\n\n", argv[0]); -#endif - -#ifdef HAVE_CLEANUP_JMP_BUF - /* Memory for the cancellation buffer. */ - struct pthread_unwind_buf unwind_buf; - - int not_first_call; - not_first_call = setjmp ((struct __jmp_buf_tag *) unwind_buf.cancel_jmp_buf); - if (__builtin_expect (! not_first_call, 1)) - { - struct pthread *self = THREAD_SELF; - - /* Store old info. */ - unwind_buf.priv.data.prev = THREAD_GETMEM (self, cleanup_jmp_buf); - unwind_buf.priv.data.cleanup = THREAD_GETMEM (self, cleanup); - - /* Store the new cleanup handler info. */ - THREAD_SETMEM (self, cleanup_jmp_buf, &unwind_buf); - - /* Run the program. */ - result = main (argc, argv, __environ MAIN_AUXVEC_PARAM); - } - else - { - /* Remove the thread-local data. */ -# ifdef SHARED - __libc_pthread_functions.ptr__nptl_deallocate_tsd (); -# else - extern void __nptl_deallocate_tsd (void) __attribute ((weak)); - __nptl_deallocate_tsd (); -# endif - - /* One less thread. Decrement the counter. If it is zero we - terminate the entire process. */ - result = 0; -# ifdef SHARED - unsigned int *const ptr = __libc_pthread_functions.ptr_nthreads; -# else - extern unsigned int __nptl_nthreads __attribute ((weak)); - unsigned int *const ptr = &__nptl_nthreads; -# endif - - if (! atomic_decrement_and_test (ptr)) - /* Not much left to do but to exit the thread, not the process. */ - __exit_thread (0); - } -#else - /* Nothing fancy, just call the function. */ - result = main (argc, argv, __environ MAIN_AUXVEC_PARAM); -#endif - - exit (result); -} |