290 lines
8 KiB
Diff
290 lines
8 KiB
Diff
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Index: ldconfig-native-2.5/readelflib.c
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===================================================================
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--- ldconfig-native-2.5.orig/readelflib.c 2009-05-19 09:40:17.000000000 +0100
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+++ ldconfig-native-2.5/readelflib.c 2009-05-19 09:56:18.000000000 +0100
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@@ -40,38 +40,190 @@
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/* Returns 0 if everything is ok, != 0 in case of error. */
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int
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-process_elf_file (const char *file_name, const char *lib, int *flag,
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+process_elf_file32 (const char *file_name, const char *lib, int *flag,
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unsigned int *osversion, char **soname, void *file_contents,
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size_t file_length)
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{
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int i;
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unsigned int j;
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- ElfW(Addr) loadaddr;
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+ Elf32_Addr loadaddr;
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unsigned int dynamic_addr;
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size_t dynamic_size;
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char *program_interpreter;
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- ElfW(Ehdr) *elf_header;
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- ElfW(Phdr) *elf_pheader, *segment;
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- ElfW(Dyn) *dynamic_segment, *dyn_entry;
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+ Elf32_Ehdr *elf_header;
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+ Elf32_Phdr *elf_pheader, *segment;
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+ Elf32_Dyn *dynamic_segment, *dyn_entry;
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char *dynamic_strings;
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- elf_header = (ElfW(Ehdr) *) file_contents;
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+ elf_header = (Elf32_Ehdr *) file_contents;
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*osversion = 0;
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- if (elf_header->e_ident [EI_CLASS] != ElfW (CLASS))
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+ if (elf_header->e_type != ET_DYN)
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+ {
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+ error (0, 0, _("%s is not a shared object file (Type: %d).\n"), file_name,
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+ elf_header->e_type);
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+ return 1;
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+ }
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+
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+ /* Get information from elf program header. */
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+ elf_pheader = (Elf32_Phdr *) (elf_header->e_phoff + file_contents);
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+ check_ptr (elf_pheader);
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+
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+ /* The library is an elf library, now search for soname and
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+ libc5/libc6. */
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+ *flag = FLAG_ELF;
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+
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+ loadaddr = -1;
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+ dynamic_addr = 0;
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+ dynamic_size = 0;
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+ program_interpreter = NULL;
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+ for (i = 0, segment = elf_pheader;
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+ i < elf_header->e_phnum; i++, segment++)
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{
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- if (opt_verbose)
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+ check_ptr (segment);
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+
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+ switch (segment->p_type)
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{
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- if (elf_header->e_ident [EI_CLASS] == ELFCLASS32)
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- error (0, 0, _("%s is a 32 bit ELF file.\n"), file_name);
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- else if (elf_header->e_ident [EI_CLASS] == ELFCLASS64)
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- error (0, 0, _("%s is a 64 bit ELF file.\n"), file_name);
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- else
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- error (0, 0, _("Unknown ELFCLASS in file %s.\n"), file_name);
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+ case PT_LOAD:
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+ if (loadaddr == (Elf32_Addr) -1)
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+ loadaddr = segment->p_vaddr - segment->p_offset;
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+ break;
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+
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+ case PT_DYNAMIC:
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+ if (dynamic_addr)
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+ error (0, 0, _("more than one dynamic segment\n"));
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+
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+ dynamic_addr = segment->p_offset;
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+ dynamic_size = segment->p_filesz;
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+ break;
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+
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+ case PT_INTERP:
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+ program_interpreter = (char *) (file_contents + segment->p_offset);
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+ check_ptr (program_interpreter);
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+
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+ /* Check if this is enough to classify the binary. */
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+ for (j = 0; j < sizeof (interpreters) / sizeof (interpreters [0]);
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+ ++j)
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+ if (strcmp (program_interpreter, interpreters[j].soname) == 0)
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+ {
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+ *flag = interpreters[j].flag;
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+ break;
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+ }
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+ break;
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+
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+ case PT_NOTE:
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+ if (!*osversion && segment->p_filesz == 32 && segment->p_align >= 4)
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+ {
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+ Elf32_Word *abi_note = (Elf32_Word *) (file_contents
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+ + segment->p_offset);
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+ if (abi_note [0] == 4 && abi_note [1] == 16 && abi_note [2] == 1
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+ && memcmp (abi_note + 3, "GNU", 4) == 0)
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+ *osversion = (abi_note [4] << 24) |
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+ ((abi_note [5] & 0xff) << 16) |
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+ ((abi_note [6] & 0xff) << 8) |
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+ (abi_note [7] & 0xff);
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+ }
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+ break;
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+
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+ default:
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+ break;
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}
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- return 1;
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+
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}
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+ if (loadaddr == (Elf32_Addr) -1)
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+ {
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+ /* Very strange. */
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+ loadaddr = 0;
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+ }
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+
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+ /* Now we can read the dynamic sections. */
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+ if (dynamic_size == 0)
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+ return 1;
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+
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+ dynamic_segment = (Elf32_Dyn *) (file_contents + dynamic_addr);
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+ check_ptr (dynamic_segment);
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+
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+ /* Find the string table. */
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+ dynamic_strings = NULL;
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+ for (dyn_entry = dynamic_segment; dyn_entry->d_tag != DT_NULL;
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+ ++dyn_entry)
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+ {
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+ check_ptr (dyn_entry);
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+ if (dyn_entry->d_tag == DT_STRTAB)
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+ {
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+ dynamic_strings = (char *) (file_contents + dyn_entry->d_un.d_val - loadaddr);
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+ check_ptr (dynamic_strings);
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+ break;
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+ }
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+ }
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+
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+ if (dynamic_strings == NULL)
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+ return 1;
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+
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+ /* Now read the DT_NEEDED and DT_SONAME entries. */
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+ for (dyn_entry = dynamic_segment; dyn_entry->d_tag != DT_NULL;
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+ ++dyn_entry)
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+ {
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+ if (dyn_entry->d_tag == DT_NEEDED || dyn_entry->d_tag == DT_SONAME)
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+ {
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+ char *name = dynamic_strings + dyn_entry->d_un.d_val;
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+ check_ptr (name);
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+
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+ if (dyn_entry->d_tag == DT_NEEDED)
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+ {
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+
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+ if (*flag == FLAG_ELF)
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+ {
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+ /* Check if this is enough to classify the binary. */
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+ for (j = 0;
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+ j < sizeof (known_libs) / sizeof (known_libs [0]);
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+ ++j)
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+ if (strcmp (name, known_libs [j].soname) == 0)
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+ {
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+ *flag = known_libs [j].flag;
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+ break;
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+ }
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+ }
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+ }
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+
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+ else if (dyn_entry->d_tag == DT_SONAME)
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+ *soname = xstrdup (name);
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+
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+ /* Do we have everything we need? */
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+ if (*soname && *flag != FLAG_ELF)
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+ return 0;
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+ }
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+ }
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+
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+ /* We reach this point only if the file doesn't contain a DT_SONAME
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+ or if we can't classify the library. If it doesn't have a
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+ soname, return the name of the library. */
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+ if (*soname == NULL)
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+ *soname = xstrdup (lib);
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+
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+ return 0;
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+}
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+
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+int
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+process_elf_file64 (const char *file_name, const char *lib, int *flag,
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+ unsigned int *osversion, char **soname, void *file_contents,
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+ size_t file_length)
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+{
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+ int i;
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+ unsigned int j;
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+ Elf64_Addr loadaddr;
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+ unsigned int dynamic_addr;
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+ size_t dynamic_size;
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+ char *program_interpreter;
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+
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+ Elf64_Ehdr *elf_header;
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+ Elf64_Phdr *elf_pheader, *segment;
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+ Elf64_Dyn *dynamic_segment, *dyn_entry;
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+ char *dynamic_strings;
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+
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+ elf_header = (Elf64_Ehdr *) file_contents;
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+ *osversion = 0;
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if (elf_header->e_type != ET_DYN)
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{
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@@ -81,7 +233,7 @@
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}
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/* Get information from elf program header. */
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- elf_pheader = (ElfW(Phdr) *) (elf_header->e_phoff + file_contents);
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+ elf_pheader = (Elf64_Phdr *) (elf_header->e_phoff + file_contents);
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check_ptr (elf_pheader);
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/* The library is an elf library, now search for soname and
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@@ -100,7 +252,7 @@
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switch (segment->p_type)
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{
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case PT_LOAD:
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- if (loadaddr == (ElfW(Addr)) -1)
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+ if (loadaddr == (Elf64_Addr) -1)
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loadaddr = segment->p_vaddr - segment->p_offset;
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break;
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@@ -129,7 +281,7 @@
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case PT_NOTE:
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if (!*osversion && segment->p_filesz == 32 && segment->p_align >= 4)
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{
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- ElfW(Word) *abi_note = (ElfW(Word) *) (file_contents
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+ Elf64_Word *abi_note = (Elf64_Word *) (file_contents
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+ segment->p_offset);
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if (abi_note [0] == 4 && abi_note [1] == 16 && abi_note [2] == 1
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&& memcmp (abi_note + 3, "GNU", 4) == 0)
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@@ -145,7 +297,7 @@
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}
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}
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- if (loadaddr == (ElfW(Addr)) -1)
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+ if (loadaddr == (Elf64_Addr) -1)
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{
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/* Very strange. */
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loadaddr = 0;
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@@ -155,7 +307,7 @@
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if (dynamic_size == 0)
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return 1;
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- dynamic_segment = (ElfW(Dyn) *) (file_contents + dynamic_addr);
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+ dynamic_segment = (Elf64_Dyn *) (file_contents + dynamic_addr);
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check_ptr (dynamic_segment);
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/* Find the string table. */
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@@ -218,3 +370,33 @@
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return 0;
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}
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+/* Returns 0 if everything is ok, != 0 in case of error. */
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+int
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+process_elf_file (const char *file_name, const char *lib, int *flag,
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+ unsigned int *osversion, char **soname, void *file_contents,
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+ size_t file_length)
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+{
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+ int i;
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+ unsigned int j;
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+ ElfW(Addr) loadaddr;
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+ unsigned int dynamic_addr;
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+ size_t dynamic_size;
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+ char *program_interpreter;
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+
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+ ElfW(Ehdr) *elf_header;
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+ ElfW(Phdr) *elf_pheader, *segment;
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+ ElfW(Dyn) *dynamic_segment, *dyn_entry;
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+ char *dynamic_strings;
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+
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+ elf_header = (ElfW(Ehdr) *) file_contents;
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+ *osversion = 0;
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+
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+ if (elf_header->e_ident [EI_CLASS] == ELFCLASS32)
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+ return process_elf_file32(file_name, lib,flag, osversion, soname, file_contents, file_length);
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+ else if (elf_header->e_ident [EI_CLASS] == ELFCLASS64)
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+ return process_elf_file64(file_name, lib,flag, osversion, soname, file_contents, file_length);
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+ error (0, 0, _("Unknown ELFCLASS in file %s.\n"), file_name);
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+ return 1;
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+}
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+
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+
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