151 lines
3.6 KiB
C
151 lines
3.6 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 <unistd.h>
|
|
#include <sys/mman.h>
|
|
#include <sys/stat.h>
|
|
#include <stdio-common/_itoa.h>
|
|
|
|
/* We have prototype anywhere. */
|
|
extern ssize_t __libc_write __P ((int __fd, __const __ptr_t __buf,
|
|
size_t __n));
|
|
|
|
#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 = 2;
|
|
|
|
|
|
void
|
|
_dl_sysdep_output (int fd, const char *msg, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start (ap, msg);
|
|
do
|
|
{
|
|
size_t len = strlen (msg);
|
|
__libc_write (fd, msg, len);
|
|
msg = va_arg (ap, const char *);
|
|
}
|
|
while (msg != NULL);
|
|
va_end (ap);
|
|
}
|
|
|
|
|
|
void
|
|
_dl_debug_message (int new_line, const char *msg, ...)
|
|
{
|
|
/* We print the strings we get passed one after the other but start all
|
|
lines using the current PID. */
|
|
static int pid;
|
|
va_list ap;
|
|
|
|
if (pid == 0)
|
|
pid = getpid ();
|
|
|
|
va_start (ap, msg);
|
|
do
|
|
if (msg[0] == '\0')
|
|
/* Get the next argument. */
|
|
msg = va_arg (ap, const char *);
|
|
else
|
|
{
|
|
const char *endp;
|
|
|
|
/* We actually will print something in this line. So print the
|
|
PID now if needed. */
|
|
if (new_line)
|
|
{
|
|
char buf[7] = "00000:\t";
|
|
assert (pid >= 0 && pid < 100000);
|
|
_itoa_word (pid, &buf[5], 10, 0);
|
|
__libc_write (_dl_debug_fd, buf, 7);
|
|
new_line = 0;
|
|
}
|
|
|
|
endp = strchr (msg, '\n');
|
|
if (endp == NULL)
|
|
{
|
|
__libc_write (_dl_debug_fd, msg, strlen (msg));
|
|
msg = va_arg (ap, const char *);
|
|
}
|
|
else
|
|
{
|
|
__libc_write (_dl_debug_fd, msg, endp - msg + 1);
|
|
msg = endp + 1;
|
|
new_line = 1;
|
|
}
|
|
}
|
|
while (msg != NULL);
|
|
va_end (ap);
|
|
}
|