diff options
Diffstat (limited to 'elf/readlib.c')
| -rw-r--r-- | elf/readlib.c | 212 |
1 files changed, 0 insertions, 212 deletions
diff --git a/elf/readlib.c b/elf/readlib.c deleted file mode 100644 index d278a189b2..0000000000 --- a/elf/readlib.c +++ /dev/null @@ -1,212 +0,0 @@ -/* Copyright (C) 1999-2017 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. - - 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. - - 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 General Public License for more details. - - 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 <libintl.h> -#include <link.h> -#include <stdio.h> -#include <string.h> -#include <unistd.h> -#include <sys/mman.h> -#include <sys/param.h> -#include <sys/stat.h> -#include <gnu/lib-names.h> - -#include <ldconfig.h> - -#define Elf32_CLASS ELFCLASS32 -#define Elf64_CLASS ELFCLASS64 - -struct known_names -{ - const char *soname; - int flag; -}; - -static struct known_names interpreters[] = -{ - { "/lib/" LD_SO, FLAG_ELF_LIBC6 }, -#ifdef SYSDEP_KNOWN_INTERPRETER_NAMES - SYSDEP_KNOWN_INTERPRETER_NAMES -#endif -}; - -static struct known_names known_libs[] = -{ - { 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 *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 stat64 statbuf; - void *file_contents; - int ret; - ElfW(Ehdr) *elf_header; - struct exec *aout_header; - - ret = 0; - *flag = FLAG_ANY; - *soname = NULL; - - file = fopen (real_file_name, "rb"); - if (file == NULL) - { - /* No error for stale symlink. */ - if (is_link && strstr (file_name, ".so") != NULL) - return 1; - error (0, 0, _("Input file %s not found.\n"), file_name); - return 1; - } - - if (fstat64 (fileno (file), &statbuf) < 0) - { - error (0, 0, _("Cannot fstat file %s.\n"), file_name); - fclose (file); - return 1; - } - - /* 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 ((size_t) statbuf.st_size < sizeof (struct exec) - || (size_t) statbuf.st_size < sizeof (ElfW(Ehdr))) - { - 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; - } - - file_contents = mmap (0, statbuf.st_size, PROT_READ, MAP_SHARED, - fileno (file), 0); - if (file_contents == MAP_FAILED) - { - error (0, 0, _("Cannot mmap file %s.\n"), 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 -#ifdef QMAGIC /* Linuxism. */ - || N_MAGIC (*aout_header) == QMAGIC -#endif - ) - { - /* Aout files don't have a soname, just return the name - including the major number. */ - char *copy, *major, *dot; - copy = xstrdup (lib); - major = strstr (copy, ".so."); - if (major) - { - dot = strstr (major + 4, "."); - if (dot) - *dot = '\0'; - } - *soname = copy; - *flag = FLAG_LIBC4; - goto done; - } - - elf_header = (ElfW(Ehdr) *) file_contents; - 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. 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 - && !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; - } - /* 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: - /* Clean up allocated memory and resources. */ - 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> |