155 lines
3.7 KiB
C
155 lines
3.7 KiB
C
/* Miscellaneous support functions for dynamic linker
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Copyright (C) 1997, 1998 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 <assert.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdarg.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <stdio-common/_itoa.h>
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/* We have prototype anywhere. */
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extern ssize_t __libc_write __P ((int __fd, __const __ptr_t __buf,
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size_t __n));
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#ifndef MAP_ANON
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/* This is the only dl-sysdep.c function that is actually needed at run-time
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by _dl_map_object. */
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int
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_dl_sysdep_open_zero_fill (void)
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{
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return __open ("/dev/zero", O_RDONLY);
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}
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#endif
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/* Read the whole contents of FILE into new mmap'd space with given
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protections. *SIZEP gets the size of the file. */
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void *
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_dl_sysdep_read_whole_file (const char *file, size_t *sizep, int prot)
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{
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void *result;
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struct stat st;
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int fd = __open (file, O_RDONLY);
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if (fd < 0)
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return NULL;
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if (__fxstat (_STAT_VER, fd, &st) < 0
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/* No need to map the file if it is empty. */
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|| st.st_size == 0)
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result = NULL;
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else
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{
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/* Map a copy of the file contents. */
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result = __mmap (0, st.st_size, prot,
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#ifdef MAP_COPY
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MAP_COPY
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#else
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MAP_PRIVATE
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#endif
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#ifdef MAP_FILE
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| MAP_FILE
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#endif
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, fd, 0);
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if (result == MAP_FAILED)
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result = NULL;
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else
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*sizep = st.st_size;
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}
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__close (fd);
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return result;
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}
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/* Descriptor to write debug messages to. */
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int _dl_debug_fd = 2;
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void
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_dl_sysdep_output (int fd, const char *msg, ...)
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{
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va_list ap;
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va_start (ap, msg);
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do
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{
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size_t len = strlen (msg);
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__libc_write (fd, msg, len);
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msg = va_arg (ap, const char *);
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}
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while (msg != NULL);
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va_end (ap);
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}
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void
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_dl_debug_message (int new_line, const char *msg, ...)
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{
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/* We print the strings we get passed one after the other but start all
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lines using the current PID. */
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int pid = 0;
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va_list ap;
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va_start (ap, msg);
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do
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if (msg[0] == '\0')
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/* Get the next argument. */
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msg = va_arg (ap, const char *);
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else
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{
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const char *endp;
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/* We actually will print something in this line. So print the
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PID now if needed. */
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if (new_line)
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{
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char buf[7];
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char *p;
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if (pid == 0)
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pid = __getpid ();
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assert (pid >= 0 && pid < 100000);
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p = _itoa_word (pid, &buf[5], 10, 0);
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while (p > buf)
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*--p = '0';
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buf[5] = ':';
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buf[6] = '\t';
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__libc_write (_dl_debug_fd, buf, 7);
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new_line = 0;
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}
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endp = msg + strcspn (msg, "\n");
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if (*endp == '\0')
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{
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__libc_write (_dl_debug_fd, msg, endp - msg);
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msg = va_arg (ap, const char *);
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}
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else
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{
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__libc_write (_dl_debug_fd, msg, endp - msg + 1);
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msg = endp + 1;
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new_line = 1;
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}
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}
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while (msg != NULL);
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va_end (ap);
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}
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