aboutsummaryrefslogtreecommitdiff
path: root/elf/readelflib.c
diff options
context:
space:
mode:
Diffstat (limited to 'elf/readelflib.c')
-rw-r--r--elf/readelflib.c220
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;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 18:25:10 +0000