diff options
Diffstat (limited to 'elf/readelflib.c')
| -rw-r--r-- | elf/readelflib.c | 220 |
1 files changed, 0 insertions, 220 deletions
diff --git a/elf/readelflib.c b/elf/readelflib.c deleted file mode 100644 index 26444ad6b2..0000000000 --- a/elf/readelflib.c +++ /dev/null @@ -1,220 +0,0 @@ -/* Copyright (C) 1999, 2000, 2001, 2002 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 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -/* This code is a heavily simplified version of the readelf program - that's part of the current binutils development version. For architectures - which need to handle both 32bit and 64bit ELF libraries, this file is - included twice for each arch size. */ - -/* check_ptr checks that a pointer is in the mmaped file and doesn't - point outside it. */ -#undef check_ptr -#define check_ptr(ptr) \ -do \ - { \ - if ((void *)(ptr) < file_contents \ - || (void *)(ptr) > (file_contents+file_length)) \ - { \ - error (0, 0, _("file %s is truncated\n"), file_name); \ - return 1; \ - } \ - } \ - while (0); - -/* Returns 0 if everything is ok, != 0 in case of error. */ -int -process_elf_file (const char *file_name, const char *lib, int *flag, - unsigned int *osversion, char **soname, void *file_contents, - size_t file_length) -{ - int i; - unsigned int j; - ElfW(Addr) loadaddr; - unsigned int dynamic_addr; - size_t dynamic_size; - char *program_interpreter; - - ElfW(Ehdr) *elf_header; - ElfW(Phdr) *elf_pheader, *segment; - ElfW(Dyn) *dynamic_segment, *dyn_entry; - char *dynamic_strings; - - elf_header = (ElfW(Ehdr) *) file_contents; - *osversion = 0; - - if (elf_header->e_ident [EI_CLASS] != ElfW (CLASS)) - { - if (opt_verbose) - { - if (elf_header->e_ident [EI_CLASS] == ELFCLASS32) - error (0, 0, _("%s is a 32 bit ELF file.\n"), file_name); - else if (elf_header->e_ident [EI_CLASS] == ELFCLASS64) - error (0, 0, _("%s is a 64 bit ELF file.\n"), file_name); - else - error (0, 0, _("Unknown ELFCLASS in file %s.\n"), file_name); - } - return 1; - } - - if (elf_header->e_type != ET_DYN) - { - error (0, 0, _("%s is not a shared object file (Type: %d).\n"), file_name, - elf_header->e_type); - return 1; - } - - /* Get information from elf program header. */ - elf_pheader = (ElfW(Phdr) *) (elf_header->e_phoff + file_contents); - check_ptr (elf_pheader); - - /* The library is an elf library, now search for soname and - libc5/libc6. */ - *flag = FLAG_ELF; - - loadaddr = -1; - dynamic_addr = 0; - dynamic_size = 0; - program_interpreter = NULL; - for (i = 0, segment = elf_pheader; - i < elf_header->e_phnum; i++, segment++) - { - check_ptr (segment); - - switch (segment->p_type) - { - case PT_LOAD: - if (loadaddr == (ElfW(Addr)) -1) - loadaddr = segment->p_vaddr - segment->p_offset; - break; - - case PT_DYNAMIC: - if (dynamic_addr) - error (0, 0, _("more than one dynamic segment\n")); - - dynamic_addr = segment->p_offset; - dynamic_size = segment->p_filesz; - break; - - case PT_INTERP: - program_interpreter = (char *) (file_contents + segment->p_offset); - check_ptr (program_interpreter); - - /* Check if this is enough to classify the binary. */ - for (j = 0; j < sizeof (interpreters) / sizeof (interpreters [0]); - ++j) - if (strcmp (program_interpreter, interpreters[j].soname) == 0) - { - *flag = interpreters[j].flag; - break; - } - break; - - case PT_NOTE: - if (!*osversion && segment->p_filesz == 32 && segment->p_align >= 4) - { - ElfW(Word) *abi_note = (ElfW(Word) *) (file_contents - + segment->p_offset); - if (abi_note [0] == 4 && abi_note [1] == 16 && abi_note [2] == 1 - && memcmp (abi_note + 3, "GNU", 4) == 0) - *osversion = (abi_note [4] << 24) | - ((abi_note [5] & 0xff) << 16) | - ((abi_note [6] & 0xff) << 8) | - (abi_note [7] & 0xff); - } - break; - - default: - break; - } - - } - if (loadaddr == (ElfW(Addr)) -1) - { - /* Very strange. */ - loadaddr = 0; - } - - /* Now we can read the dynamic sections. */ - if (dynamic_size == 0) - return 1; - - dynamic_segment = (ElfW(Dyn) *) (file_contents + dynamic_addr); - check_ptr (dynamic_segment); - - /* Find the string table. */ - dynamic_strings = NULL; - for (dyn_entry = dynamic_segment; dyn_entry->d_tag != DT_NULL; - ++dyn_entry) - { - check_ptr (dyn_entry); - if (dyn_entry->d_tag == DT_STRTAB) - { - dynamic_strings = (char *) (file_contents + dyn_entry->d_un.d_val - loadaddr); - check_ptr (dynamic_strings); - break; - } - } - - if (dynamic_strings == NULL) - return 1; - - /* Now read the DT_NEEDED and DT_SONAME entries. */ - for (dyn_entry = dynamic_segment; dyn_entry->d_tag != DT_NULL; - ++dyn_entry) - { - if (dyn_entry->d_tag == DT_NEEDED || dyn_entry->d_tag == DT_SONAME) - { - char *name = dynamic_strings + dyn_entry->d_un.d_val; - check_ptr (name); - - if (dyn_entry->d_tag == DT_NEEDED) - { - - if (*flag == FLAG_ELF) - { - /* Check if this is enough to classify the binary. */ - for (j = 0; - j < sizeof (known_libs) / sizeof (known_libs [0]); - ++j) - if (strcmp (name, known_libs [j].soname) == 0) - { - *flag = known_libs [j].flag; - break; - } - } - } - - else if (dyn_entry->d_tag == DT_SONAME) - *soname = xstrdup (name); - - /* Do we have everything we need? */ - if (*soname && *flag != FLAG_ELF) - return 0; - } - } - - /* We reach this point only if the file doesn't contain a DT_SONAME - or if we can't classify the library. If it doesn't have a - soname, return the name of the library. */ - if (*soname == NULL) - *soname = xstrdup (lib); - - return 0; -} |