-/* Copyright (C) 1999, 2000 Free Software Foundation, Inc.
+/* Copyright (C) 1999-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Andreas Jaeger <aj@suse.de>, 1999 and
Jakub Jelinek <jakub@redhat.com>, 1999.
- 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.
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; 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,
+ This program 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.
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU 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 General Public License
+ along with this program; if not, see <http://www.gnu.org/licenses/>. */
/* The code in this file and in readelflib is a heavily simplified
version of the readelf program that's part of the current binutils
development version. Besides the simplification, it has also been
modified to read some other file formats. */
-
+#include <a.out.h>
#include <elf.h>
#include <error.h>
-#include <link.h>
#include <libintl.h>
+#include <link.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
-#include <a.out.h>
-
#include <sys/mman.h>
+#include <sys/param.h>
#include <sys/stat.h>
+#include <gnu/lib-names.h>
-#include "ldconfig.h"
+#include <ldconfig.h>
#define Elf32_CLASS ELFCLASS32
#define Elf64_CLASS ELFCLASS64
int flag;
};
-static struct known_names interpreters [] =
+static struct known_names interpreters[] =
{
- {"/lib/ld-linux.so.2", FLAG_ELF_LIBC6},
- {"/lib/ld-linux.so.1", FLAG_ELF_LIBC5}
+ { "/lib/" LD_SO, FLAG_ELF_LIBC6 },
+#ifdef SYSDEP_KNOWN_INTERPRETER_NAMES
+ SYSDEP_KNOWN_INTERPRETER_NAMES
+#endif
};
-static struct known_names known_libs [] =
+static struct known_names known_libs[] =
{
- {"libc.so.6", FLAG_ELF_LIBC6},
- {"libc.so.5", FLAG_ELF_LIBC5},
- {"libm.so.6", FLAG_ELF_LIBC6},
- {"libm.so.5", FLAG_ELF_LIBC5}
+ { LIBC_SO, FLAG_ELF_LIBC6 },
+ { LIBM_SO, FLAG_ELF_LIBC6 },
+#ifdef SYSDEP_KNOWN_LIBRARY_NAMES
+ SYSDEP_KNOWN_LIBRARY_NAMES
+#endif
};
+/* Check if string corresponds to a GDB Python file. */
+static bool
+is_gdb_python_file (const char *name)
+{
+ size_t len = strlen (name);
+ return len > 7 && strcmp (name + len - 7, "-gdb.py") == 0;
+}
/* Returns 0 if everything is ok, != 0 in case of error. */
int
-process_file (const char *file_name, const char *lib, int *flag, char **soname, int is_link)
+process_file (const char *real_file_name, const char *file_name,
+ const char *lib, int *flag, unsigned int *osversion,
+ char **soname, int is_link, struct stat64 *stat_buf)
{
FILE *file;
- struct stat statbuf;
+ struct stat64 statbuf;
void *file_contents;
int ret;
-
ElfW(Ehdr) *elf_header;
struct exec *aout_header;
*flag = FLAG_ANY;
*soname = NULL;
- file = fopen (file_name, "rb");
+ file = fopen (real_file_name, "rb");
if (file == NULL)
{
/* No error for stale symlink. */
- if (is_link && strstr (file_name, ".so.") != NULL)
+ if (is_link && strstr (file_name, ".so") != NULL)
return 1;
error (0, 0, _("Input file %s not found.\n"), file_name);
return 1;
}
- if (fstat (fileno (file), &statbuf) < 0)
+ if (fstat64 (fileno (file), &statbuf) < 0)
{
error (0, 0, _("Cannot fstat file %s.\n"), file_name);
fclose (file);
/* Check that the file is large enough so that we can access the
information. We're only checking the size of the headers here. */
- if (statbuf.st_size < sizeof (struct exec)
- || statbuf.st_size < sizeof (ElfW(Ehdr)))
+ if ((size_t) statbuf.st_size < sizeof (struct exec)
+ || (size_t) statbuf.st_size < sizeof (ElfW(Ehdr)))
{
- error (0, 0, _("File %s is too small, not checked."), file_name);
+ if (statbuf.st_size == 0)
+ error (0, 0, _("File %s is empty, not checked."), file_name);
+ else
+ {
+ char buf[SELFMAG];
+ size_t n = MIN (statbuf.st_size, SELFMAG);
+ if (fread (buf, n, 1, file) == 1 && memcmp (buf, ELFMAG, n) == 0)
+ error (0, 0, _("File %s is too small, not checked."), file_name);
+ }
fclose (file);
return 1;
}
/* First check if this is an aout file. */
aout_header = (struct exec *) file_contents;
if (N_MAGIC (*aout_header) == ZMAGIC
- || N_MAGIC (*aout_header) == QMAGIC)
+#ifdef QMAGIC /* Linuxism. */
+ || N_MAGIC (*aout_header) == QMAGIC
+#endif
+ )
{
/* Aout files don't have a soname, just return the name
- including the major number. */
+ including the major number. */
char *copy, *major, *dot;
copy = xstrdup (lib);
major = strstr (copy, ".so.");
}
elf_header = (ElfW(Ehdr) *) file_contents;
- if (elf_header->e_ident [EI_MAG0] != ELFMAG0
- || elf_header->e_ident [EI_MAG1] != ELFMAG1
- || elf_header->e_ident [EI_MAG2] != ELFMAG2
- || elf_header->e_ident [EI_MAG3] != ELFMAG3)
+ if (memcmp (elf_header->e_ident, ELFMAG, SELFMAG) != 0)
{
- /* The file is neither ELF nor aout. Check if it's a linker script,
- like libc.so - otherwise complain. */
- int len = statbuf.st_size;
- /* Only search the beginning of the file. */
- if (len > 512)
- len = 512;
+ /* The file is neither ELF nor aout. Check if it's a linker
+ script, like libc.so - otherwise complain. Only search the
+ beginning of the file. */
+ size_t len = MIN (statbuf.st_size, 512);
if (memmem (file_contents, len, "GROUP", 5) == NULL
- && memmem (file_contents, len, "GNU ld script", 13) == NULL)
+ && memmem (file_contents, len, "GNU ld script", 13) == NULL
+ && !is_gdb_python_file (file_name))
error (0, 0, _("%s is not an ELF file - it has the wrong magic bytes at the start.\n"),
file_name);
ret = 1;
- goto done;
}
-
- if (process_elf_file (file_name, lib, flag, soname, file_contents))
+ /* Libraries have to be shared object files. */
+ else if (elf_header->e_type != ET_DYN)
+ ret = 1;
+ else if (process_elf_file (file_name, lib, flag, osversion, soname,
+ file_contents, statbuf.st_size))
ret = 1;
done:
munmap (file_contents, statbuf.st_size);
fclose (file);
+ *stat_buf = statbuf;
return ret;
}
+/* Returns made up soname if lib doesn't have explicit DT_SONAME. */
+
+char *
+implicit_soname (const char *lib, int flag)
+{
+ char *soname = xstrdup (lib);
+
+ if ((flag & FLAG_TYPE_MASK) != FLAG_LIBC4)
+ return soname;
+
+ /* Aout files don't have a soname, just return the name
+ including the major number. */
+ char *major = strstr (soname, ".so.");
+ if (major)
+ {
+ char *dot = strstr (major + 4, ".");
+ if (dot)
+ *dot = '\0';
+ }
+ return soname;
+}
+
/* Get architecture specific version of process_elf_file. */
-#include "readelflib.c"
+#include <readelflib.c>
projects / thirdparty / glibc.git / blobdiff