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| author | Andreas Schwab <schwab@suse.de> | 2019-10-09 17:46:47 +0200 |
|---|---|---|
| committer | Andreas Schwab <schwab@suse.de> | 2019-10-16 15:54:44 +0200 |
| commit | 58e8f5fd2ba47b6dc47fd4d0a35e4175c7c87aaa (patch) | |
| tree | fa4ce3fca5be8422abccaf5af6c6d58a1af075d9 | |
| parent | e7c8ffe4ec059da1523c093d6a240cd87d154df2 (diff) | |
| download | glibc-58e8f5fd2ba47b6dc47fd4d0a35e4175c7c87aaa.zip glibc-58e8f5fd2ba47b6dc47fd4d0a35e4175c7c87aaa.tar.gz glibc-58e8f5fd2ba47b6dc47fd4d0a35e4175c7c87aaa.tar.bz2 | |
ldconfig: handle .dynstr located in separate segment (bug 25087)
To determine the load offset of the DT_STRTAB section search for the
segment containing it, instead of using the load offset of the first
segment.
| -rw-r--r-- | elf/readelflib.c | 36 |
1 files changed, 23 insertions, 13 deletions
diff --git a/elf/readelflib.c b/elf/readelflib.c index 09f5858..499cccb 100644 --- a/elf/readelflib.c +++ b/elf/readelflib.c @@ -45,7 +45,6 @@ process_elf_file (const char *file_name, const char *lib, int *flag, { int i; unsigned int j; - ElfW(Addr) loadaddr; unsigned int dynamic_addr; size_t dynamic_size; char *program_interpreter; @@ -87,7 +86,6 @@ process_elf_file (const char *file_name, const char *lib, int *flag, libc5/libc6. */ *flag = FLAG_ELF; - loadaddr = -1; dynamic_addr = 0; dynamic_size = 0; program_interpreter = NULL; @@ -98,11 +96,6 @@ process_elf_file (const char *file_name, const char *lib, int *flag, 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")); @@ -176,11 +169,6 @@ process_elf_file (const char *file_name, const char *lib, int *flag, } } - if (loadaddr == (ElfW(Addr)) -1) - { - /* Very strange. */ - loadaddr = 0; - } /* Now we can read the dynamic sections. */ if (dynamic_size == 0) @@ -197,7 +185,29 @@ process_elf_file (const char *file_name, const char *lib, int *flag, check_ptr (dyn_entry); if (dyn_entry->d_tag == DT_STRTAB) { - dynamic_strings = (char *) (file_contents + dyn_entry->d_un.d_val - loadaddr); + /* Find the file offset of the segment containing the dynamic + string table. */ + ElfW(Off) loadoff = -1; + for (i = 0, segment = elf_pheader; + i < elf_header->e_phnum; i++, segment++) + { + if (segment->p_type == PT_LOAD + && dyn_entry->d_un.d_val >= segment->p_vaddr + && (dyn_entry->d_un.d_val - segment->p_vaddr + < segment->p_filesz)) + { + loadoff = segment->p_vaddr - segment->p_offset; + break; + } + } + if (loadoff == (ElfW(Off)) -1) + { + /* Very strange. */ + loadoff = 0; + } + + dynamic_strings = (char *) (file_contents + dyn_entry->d_un.d_val + - loadoff); check_ptr (dynamic_strings); break; } |