diff options
| -rw-r--r-- | binutils/ChangeLog | 4 | ||||
| -rw-r--r-- | binutils/readelf.c | 89 |
2 files changed, 91 insertions, 2 deletions
diff --git a/binutils/ChangeLog b/binutils/ChangeLog index 7f8e29d..d2ddf41 100644 --- a/binutils/ChangeLog +++ b/binutils/ChangeLog @@ -1,3 +1,7 @@ +2017-04-26 Maciej W. Rozycki <macro@imgtec.com> + + * readelf.c (process_mips_specific): Add static GOT support. + 2017-04-25 Maciej W. Rozycki <macro@imgtec.com> * readelf.c (process_mips_specific): Remove error reporting from diff --git a/binutils/readelf.c b/binutils/readelf.c index 1139f71..2d3ef27 100644 --- a/binutils/readelf.c +++ b/binutils/readelf.c @@ -15007,8 +15007,93 @@ process_mips_specific (FILE * file) /* We have a lot of special sections. Thanks SGI! */ if (dynamic_section == NULL) - /* No information available. */ - return res; + { + /* No dynamic information available. See if there is static GOT. */ + sect = find_section (".got"); + if (sect != NULL) + { + unsigned char *data_end; + unsigned char *data; + bfd_vma ent, end; + int addr_size; + + pltgot = sect->sh_addr; + + ent = pltgot; + addr_size = (is_32bit_elf ? 4 : 8); + end = pltgot + sect->sh_size; + + data = (unsigned char *) get_data (NULL, file, sect->sh_offset, + end - pltgot, 1, + _("Global Offset Table data")); + /* PR 12855: Null data is handled gracefully throughout. */ + data_end = data + (end - pltgot); + + printf (_("\nStatic GOT:\n")); + printf (_(" Canonical gp value: ")); + print_vma (ent + 0x7ff0, LONG_HEX); + printf ("\n\n"); + + /* In a dynamic binary GOT[0] is reserved for the dynamic + loader to store the lazy resolver pointer, however in + a static binary it may well have been omitted and GOT + reduced to a table of addresses. + PR 21344: Check for the entry being fully available + before fetching it. */ + if (data + && data + ent - pltgot + addr_size <= data_end + && byte_get (data + ent - pltgot, addr_size) == 0) + { + printf (_(" Reserved entries:\n")); + printf (_(" %*s %10s %*s\n"), + addr_size * 2, _("Address"), _("Access"), + addr_size * 2, _("Value")); + ent = print_mips_got_entry (data, pltgot, ent, data_end); + printf ("\n"); + if (ent == (bfd_vma) -1) + goto sgot_print_fail; + + /* Check for the MSB of GOT[1] being set, identifying a + GNU object. This entry will be used by some runtime + loaders, to store the module pointer. Otherwise this + is an ordinary local entry. + PR 21344: Check for the entry being fully available + before fetching it. */ + if (data + && data + ent - pltgot + addr_size <= data_end + && (byte_get (data + ent - pltgot, addr_size) + >> (addr_size * 8 - 1)) != 0) + { + ent = print_mips_got_entry (data, pltgot, ent, data_end); + printf ("\n"); + if (ent == (bfd_vma) -1) + goto sgot_print_fail; + } + printf ("\n"); + } + + if (ent < end) + { + printf (_(" Local entries:\n")); + printf (" %*s %10s %*s\n", + addr_size * 2, _("Address"), _("Access"), + addr_size * 2, _("Value")); + while (ent < end) + { + ent = print_mips_got_entry (data, pltgot, ent, data_end); + printf ("\n"); + if (ent == (bfd_vma) -1) + goto sgot_print_fail; + } + printf ("\n"); + } + + sgot_print_fail: + if (data) + free (data); + } + return res; + } for (entry = dynamic_section; /* PR 17531 file: 012-50589-0.004. */ |