/* Miscellaneous support functions for dynamic linker
- Copyright (C) 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
+ Copyright (C) 1997-2015 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.
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 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.
+ Lesser 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. */
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
#include <assert.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
+#include <stdint.h>
#include <sys/mman.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/uio.h>
-#include <stdio-common/_itoa.h>
+#include <sysdep.h>
+#include <_itoa.h>
+#include <dl-writev.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. */
+ protections. *SIZEP gets the size of the file. On error MAP_FAILED
+ is returned. */
void *
internal_function
_dl_sysdep_read_whole_file (const char *file, size_t *sizep, int prot)
{
- void *result;
+ void *result = MAP_FAILED;
struct stat64 st;
- int fd = __open (file, O_RDONLY);
- if (fd < 0)
- return NULL;
- if (__fxstat64 (_STAT_VER, fd, &st) < 0
- /* No need to map the file if it is empty. */
- || st.st_size == 0)
- result = NULL;
- else
+ int flags = O_RDONLY;
+#ifdef O_CLOEXEC
+ flags |= O_CLOEXEC;
+#endif
+ int fd = __open (file, flags);
+ if (fd >= 0)
{
- /* Map a copy of the file contents. */
- result = __mmap (0, st.st_size, prot,
+ if (__fxstat64 (_STAT_VER, fd, &st) >= 0)
+ {
+ *sizep = st.st_size;
+
+ /* No need to map the file if it is empty. */
+ if (*sizep != 0)
+ /* Map a copy of the file contents. */
+ result = __mmap (NULL, *sizep, prot,
#ifdef MAP_COPY
- MAP_COPY
+ MAP_COPY
#else
- MAP_PRIVATE
+ MAP_PRIVATE
#endif
#ifdef MAP_FILE
- | MAP_FILE
+ | MAP_FILE
#endif
- , fd, 0);
- if (result == MAP_FAILED)
- result = NULL;
- else
- *sizep = st.st_size;
+ , fd, 0);
+ }
+ __close (fd);
}
- __close (fd);
return result;
}
-/* Descriptor to write debug messages to. */
-int _dl_debug_fd = 2;
-
-
-/* Bare-bone printf implementation. This function only knows about
+/* Bare-bones printf implementation. This function only knows about
the formats and flags needed and can handle only up to 64 stripes in
the output. */
static void
_dl_debug_vdprintf (int fd, int tag_p, const char *fmt, va_list arg)
{
- const int niovmax = 64;
- struct iovec iov[niovmax];
+# define NIOVMAX 64
+ struct iovec iov[NIOVMAX];
int niov = 0;
pid_t pid = 0;
- char pidbuf[7];
+ char pidbuf[12];
while (*fmt != '\0')
{
{
char *p;
pid = __getpid ();
- assert (pid >= 0 && pid < 100000);
- p = _itoa_word (pid, &pidbuf[5], 10, 0);
+ assert (pid >= 0 && sizeof (pid_t) <= 4);
+ p = _itoa (pid, &pidbuf[10], 10, 0);
while (p > pidbuf)
- *--p = '0';
- pidbuf[5] = ':';
- pidbuf[6] = '\t';
+ *--p = ' ';
+ pidbuf[10] = ':';
+ pidbuf[11] = '\t';
}
/* Append to the output. */
- assert (niov < niovmax);
- iov[niov].iov_len = 7;
+ assert (niov < NIOVMAX);
+ iov[niov].iov_len = 12;
iov[niov++].iov_base = pidbuf;
/* No more tags until we see the next newline. */
++fmt;
/* Append constant string. */
- assert (niov < niovmax);
+ assert (niov < NIOVMAX);
if ((iov[niov].iov_len = fmt - startp) != 0)
iov[niov++].iov_base = (char *) startp;
/* It is a format specifier. */
char fill = ' ';
int width = -1;
+ int prec = -1;
#if LONG_MAX != INT_MAX
int long_mod = 0;
#endif
++fmt;
}
+ /* Handle precision. */
+ if (*fmt == '.' && fmt[1] == '*')
+ {
+ prec = va_arg (arg, int);
+ fmt += 2;
+ }
+
/* Recognize the l modifier. It is only important on some
platforms where long and int have a different size. We
can use the same code for size_t. */
having more than one integer formatting in a call. */
char *buf = (char *) alloca (3 * sizeof (unsigned long int));
char *endp = &buf[3 * sizeof (unsigned long int)];
- char *cp = _itoa_word (num, endp, *fmt == 'x' ? 16 : 10, 0);
+ char *cp = _itoa (num, endp, *fmt == 'x' ? 16 : 10, 0);
/* Pad to the width the user specified. */
if (width != -1)
/* Get the string argument. */
iov[niov].iov_base = va_arg (arg, char *);
iov[niov].iov_len = strlen (iov[niov].iov_base);
+ if (prec != -1)
+ iov[niov].iov_len = MIN ((size_t) prec, iov[niov].iov_len);
+ ++niov;
+ break;
+
+ case '%':
+ iov[niov].iov_base = (void *) fmt;
+ iov[niov].iov_len = 1;
++niov;
break;
}
/* Finally write the result. */
- __writev (fd, iov, niov);
+ _dl_writev (fd, iov, niov);
}
va_list arg;
va_start (arg, fmt);
- _dl_debug_vdprintf (_dl_debug_fd, 1, fmt, arg);
+ _dl_debug_vdprintf (GLRO(dl_debug_fd), 1, fmt, arg);
va_end (arg);
}
va_list arg;
va_start (arg, fmt);
- _dl_debug_vdprintf (_dl_debug_fd, -1, fmt, arg);
+ _dl_debug_vdprintf (GLRO(dl_debug_fd), -1, fmt, arg);
va_end (arg);
}
_dl_debug_vdprintf (fd, 0, fmt, arg);
va_end (arg);
}
+
+
+/* Test whether given NAME matches any of the names of the given object. */
+int
+internal_function
+_dl_name_match_p (const char *name, const struct link_map *map)
+{
+ if (strcmp (name, map->l_name) == 0)
+ return 1;
+
+ struct libname_list *runp = map->l_libname;
+
+ while (runp != NULL)
+ if (strcmp (name, runp->name) == 0)
+ return 1;
+ else
+ runp = runp->next;
+
+ return 0;
+}
+
+
+unsigned long int
+internal_function
+_dl_higher_prime_number (unsigned long int n)
+{
+ /* These are primes that are near, but slightly smaller than, a
+ power of two. */
+ static const uint32_t primes[] = {
+ UINT32_C (7),
+ UINT32_C (13),
+ UINT32_C (31),
+ UINT32_C (61),
+ UINT32_C (127),
+ UINT32_C (251),
+ UINT32_C (509),
+ UINT32_C (1021),
+ UINT32_C (2039),
+ UINT32_C (4093),
+ UINT32_C (8191),
+ UINT32_C (16381),
+ UINT32_C (32749),
+ UINT32_C (65521),
+ UINT32_C (131071),
+ UINT32_C (262139),
+ UINT32_C (524287),
+ UINT32_C (1048573),
+ UINT32_C (2097143),
+ UINT32_C (4194301),
+ UINT32_C (8388593),
+ UINT32_C (16777213),
+ UINT32_C (33554393),
+ UINT32_C (67108859),
+ UINT32_C (134217689),
+ UINT32_C (268435399),
+ UINT32_C (536870909),
+ UINT32_C (1073741789),
+ UINT32_C (2147483647),
+ /* 4294967291L */
+ UINT32_C (2147483647) + UINT32_C (2147483644)
+ };
+
+ const uint32_t *low = &primes[0];
+ const uint32_t *high = &primes[sizeof (primes) / sizeof (primes[0])];
+
+ while (low != high)
+ {
+ const uint32_t *mid = low + (high - low) / 2;
+ if (n > *mid)
+ low = mid + 1;
+ else
+ high = mid;
+ }
+
+#if 0
+ /* If we've run out of primes, abort. */
+ if (n > *low)
+ {
+ fprintf (stderr, "Cannot find prime bigger than %lu\n", n);
+ abort ();
+ }
+#endif
+
+ return *low;
+}