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/* Miscellaneous support functions for dynamic linker
Copyright (C) 1997, 1998, 1999, 2000 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 <link.h>
#include <stdarg.h>
#include <string.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <stdio-common/_itoa.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 elf_stat st;
int fd = __open (file, O_RDONLY);
if (fd < 0)
return NULL;
if (elf_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. */
int pid = 0;
va_list ap;
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];
char *p;
if (pid == 0)
pid = __getpid ();
assert (pid >= 0 && pid < 100000);
p = _itoa_word (pid, &buf[5], 10, 0);
while (p > buf)
*--p = '0';
buf[5] = ':';
buf[6] = '\t';
__libc_write (_dl_debug_fd, buf, 7);
new_line = 0;
}
endp = msg + strcspn (msg, "\n");
if (*endp == '\0')
{
__libc_write (_dl_debug_fd, msg, endp - 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);
}
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