ToDo list for elfutils -*-outline-*-
----------------------
-Time-stamp: <2009-01-01 16:56:38 drepper>
+Time-stamp: <2009-01-16 20:55:06 drepper>
* mkinstalldirs
check TLS relocation depencies
+ Check content of .eh_frame_hdr, .eh_frame, .gcc_except_table
+
*** for x86
check that R_386_TLS_GD is followed by R_386_PLT32 for __tls_get_addr
2009-01-16 Ulrich Drepper <drepper@redhat.com>
+ * elflint.c (check_program_header): Check that PT_GNU_EH_FRAME entry
+ matches .eh_frame_hdr section, if it is available. Also check that
+ the segment is allocated, not writable, not executable.
+
* readelf.c: Add -e option. Dump exception and unwind related
sections. Add -e to -a.
(print_encoding_base): Handle DW_EH_PE_omit.
if ((phdr2->p_flags & PF_W) == 0)
ERROR (gettext ("\
loadable segment GNU_RELRO applies to is not writable\n"));
- if ((phdr2->p_flags &~ PF_W) != (phdr->p_flags &~ PF_W))
+ if ((phdr2->p_flags & ~PF_W) != (phdr->p_flags & ~PF_W))
ERROR (gettext ("\
loadable segment [%u] flags do not match GNU_RELRO [%u] flags\n"),
cnt, inner);
ERROR (gettext ("\
program header offset in ELF header and PHDR entry do not match"));
}
+ else if (phdr->p_type == PT_GNU_EH_FRAME)
+ {
+ /* If there is an .eh_frame_hdr section it must be
+ referenced by this program header entry. */
+ Elf_Scn *scn = NULL;
+ while ((scn = elf_nextscn (ebl->elf, scn)) != NULL)
+ {
+ GElf_Shdr shdr_mem;
+ GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
+ if (shdr != NULL && shdr->sh_type == SHT_PROGBITS
+ && ! strcmp (".eh_frame_hdr",
+ elf_strptr (ebl->elf, shstrndx, shdr->sh_name)))
+ {
+ if (phdr->p_offset != shdr->sh_offset)
+ ERROR (gettext ("\
+call frame search table reference in program header has wrong offset\n"));
+ if (phdr->p_memsz != shdr->sh_size)
+ ERROR (gettext ("\
+call frame search table size mismatch in program and section header\n"));
+ break;
+ }
+ }
+
+ /* The section must be allocated and not be writable and
+ executable. */
+ if ((phdr->p_flags & PF_R) == 0)
+ ERROR (gettext ("\
+call frame search table must be allocated\n"));
+ if ((phdr->p_flags & PF_W) != 0)
+ ERROR (gettext ("\
+call frame search table must not be writable\n"));
+ if ((phdr->p_flags & PF_X) != 0)
+ ERROR (gettext ("\
+call frame search table must not be executable\n"));
+ }
if (phdr->p_filesz > phdr->p_memsz
&& (phdr->p_memsz != 0 || phdr->p_type != PT_NOTE))