120 lines
4.0 KiB
C
120 lines
4.0 KiB
C
/* Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <stdlib.h>
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#include <unistd.h>
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#include <ldsodefs.h>
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#include <bp-start.h>
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#include <bp-sym.h>
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extern void __libc_init_first (int argc, char **argv, char **envp);
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extern int _dl_starting_up;
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weak_extern (_dl_starting_up)
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extern int __libc_multiple_libcs;
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extern void *__libc_stack_end;
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#ifndef SHARED
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extern void __pthread_initialize_minimal (void) __attribute__ ((weak));
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#endif
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extern int BP_SYM (__libc_start_main) (int (*main) (int, char **, char **),
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int argc,
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char *__unbounded *__unbounded ubp_av,
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void (*init) (void),
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void (*fini) (void),
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void (*rtld_fini) (void),
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void *__unbounded stack_end)
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__attribute__ ((noreturn));
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int
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/* GKM FIXME: GCC: this should get __BP_ prefix by virtue of the
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BPs in the arglist of startup_info.main and startup_info.init. */
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BP_SYM (__libc_start_main) (int (*main) (int, char **, char **),
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int argc, char *__unbounded *__unbounded ubp_av,
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void (*init) (void), void (*fini) (void),
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void (*rtld_fini) (void), void *__unbounded stack_end)
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{
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char *__unbounded *__unbounded ubp_ev = &ubp_av[argc + 1];
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#if __BOUNDED_POINTERS__
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char **argv;
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#else
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# define argv ubp_av
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#endif
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#ifndef SHARED
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/* The next variable is only here to work around a bug in gcc <= 2.7.2.2.
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If the address would be taken inside the expression the optimizer
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would try to be too smart and throws it away. Grrr. */
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int *dummy_addr = &_dl_starting_up;
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__libc_multiple_libcs = dummy_addr && !_dl_starting_up;
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#endif
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INIT_ARGV_and_ENVIRON;
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/* Store the lowest stack address. */
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__libc_stack_end = stack_end;
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#ifndef SHARED
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/* Initialize the thread library at least a bit since the libgcc
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functions are using thread functions if these are available and
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we need to setup errno. */
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if (__pthread_initialize_minimal)
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__pthread_initialize_minimal ();
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/* Some security at this point. Prevent starting a SUID binary where
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the standard file descriptors are not opened. We have to do this
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only for statically linked applications since otherwise the dynamic
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loader did the work already. */
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if (__builtin_expect (__libc_enable_secure, 0))
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__libc_check_standard_fds ();
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#endif
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/* Register the destructor of the dynamic linker if there is any. */
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if (__builtin_expect (rtld_fini != NULL, 1))
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atexit (rtld_fini);
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/* Call the initializer of the libc. This is only needed here if we
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are compiling for the static library in which case we haven't
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run the constructors in `_dl_start_user'. */
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#ifndef SHARED
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__libc_init_first (argc, argv, __environ);
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#endif
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/* Register the destructor of the program, if any. */
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if (fini)
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atexit (fini);
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/* Call the initializer of the program, if any. */
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#ifdef SHARED
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if (__builtin_expect (_dl_debug_impcalls, 0))
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_dl_debug_message (1, "\ninitialize program: ", argv[0], "\n\n", NULL);
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#endif
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if (init)
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(*init) ();
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#ifdef SHARED
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if (__builtin_expect (_dl_debug_impcalls, 0))
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_dl_debug_message (1, "\ntransferring control: ", argv[0], "\n\n", NULL);
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#endif
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exit ((*main) (argc, argv, __environ));
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}
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