mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-25 02:33:36 +08:00
7dea968e78
1998-03-06 17:04 Ulrich Drepper <drepper@cygnus.com> * libc.map: Add _dl_debug_impcalls, _dl_debug_fd, _dl_sysdep_output, __libc_start_main. * csu/Makefile (routines): Add libc-start. * elf/dl-error.c: Remove declaration of _dl_argv. Include <unitsd.h>. * elf/dl-lookup.c: Likewise. * elf/dl-version.c: Likewise. * sysdeps/i386/dl-machine.h: Likewise. * elf/link.h: Declare _dl_argv, _dl_debug_fd. Declare _dl_sysdep_output. Make _dl_sysdep_fatal, _dl_sysdep_error and _dl_sysdep_message macros which use _dl_sysdep_output. * elf/dl-fini.c: Write out which destructor is called while debugging. * elf/dl-init.c: Likewise for constructor. * elf/dl-load.c: Use _dl_debug_message instead of _dl_sysdep_message. * elf/dl-misc.c: Remove _dl_sysdep_fatal, _dl_sysdep_error and _dl_sysdep_message. Add _dl_sysdep_output. * elf/rtld.c: Recognize LD_DEBUG_OUTPUT. Set _dl_debug_fd if this file can be opened. For LD_DEBUG=libs also set _dl_debug_impcalls. * sysdeps/generic/dl-cache.c: Include unistd.h. * sysdeps/generic/libc-start.c: New file. * sysdeps/i386/elf/start.S: Don't call main directly, call * sysdeps/unix/sysv/linux/libc-start.c: New file. __libc_start_main instead. * elf/Makefile ($(objpfx)ld.so): Add $(load-map-file) as dependency.
95 lines
2.4 KiB
C
95 lines
2.4 KiB
C
/* Miscellaneous support functions for dynamic linker
|
|
Copyright (C) 1997, 1998 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., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <assert.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include <stdarg.h>
|
|
#include <string.h>
|
|
#include <sys/mman.h>
|
|
#include <sys/stat.h>
|
|
|
|
#ifndef MAP_ANON
|
|
/* This is the only dl-sysdep.c function that is actually needed at run-time
|
|
by _dl_map_object. */
|
|
|
|
int
|
|
_dl_sysdep_open_zero_fill (void)
|
|
{
|
|
return __open ("/dev/zero", O_RDONLY);
|
|
}
|
|
#endif
|
|
|
|
/* Read the whole contents of FILE into new mmap'd space with given
|
|
protections. *SIZEP gets the size of the file. */
|
|
|
|
void *
|
|
_dl_sysdep_read_whole_file (const char *file, size_t *sizep, int prot)
|
|
{
|
|
void *result;
|
|
struct stat st;
|
|
int fd = __open (file, O_RDONLY);
|
|
if (fd < 0)
|
|
return NULL;
|
|
if (__fxstat (_STAT_VER, fd, &st) < 0
|
|
/* No need to map the file if it is empty. */
|
|
|| st.st_size == 0)
|
|
result = NULL;
|
|
else
|
|
{
|
|
/* Map a copy of the file contents. */
|
|
result = __mmap (0, st.st_size, prot,
|
|
#ifdef MAP_COPY
|
|
MAP_COPY
|
|
#else
|
|
MAP_PRIVATE
|
|
#endif
|
|
#ifdef MAP_FILE
|
|
| MAP_FILE
|
|
#endif
|
|
, fd, 0);
|
|
if (result == MAP_FAILED)
|
|
result = NULL;
|
|
else
|
|
*sizep = st.st_size;
|
|
}
|
|
__close (fd);
|
|
return result;
|
|
}
|
|
|
|
|
|
/* Descriptor to write debug messages to. */
|
|
int _dl_debug_fd;
|
|
|
|
|
|
void
|
|
_dl_sysdep_output (int fd, const char *msg, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start (ap, msg);
|
|
do
|
|
{
|
|
size_t len = strlen (msg);
|
|
__write (fd, msg, len);
|
|
msg = va_arg (ap, const char *);
|
|
} while (msg);
|
|
va_end (ap);
|
|
}
|