Commit Graph

12 Commits

Author SHA1 Message Date
Rafael Espindola e2b355d651 Don't create an unused _GLOBAL_OFFSET_TABLE_.
This was a bug for bug compatibility with gas that is completely unnecessary.
If a _GLOBAL_OFFSET_TABLE_ symbol is used, it will already be created by
the time we get to the ELF writer.

llvm-svn: 238432
2015-05-28 15:20:00 +00:00
Rafael Espindola 4f60a38f18 Change how we iterate over relocations on ELF.
For COFF and MachO, sections semantically have relocations that apply to them.
That is not the case on ELF.

In relocatable objects (.o), a section with relocations in ELF has offsets to
another section where the relocations should be applied.

In dynamic objects and executables, relocations don't have an offset, they have
a virtual address. The section sh_info may or may not point to another section,
but that is not actually used for resolving the relocations.

This patch exposes that in the ObjectFile API. It has the following advantages:

* Most (all?) clients can handle this more efficiently. They will normally walk
all relocations, so doing an effort to iterate in a particular order doesn't
save time.

* llvm-readobj now prints relocations in the same way the native readelf does.

* probably most important, relocations that don't point to any section are now
visible. This is the case of relocations in the rela.dyn section. See the
updated relocation-executable.test for example.

llvm-svn: 182908
2013-05-30 03:05:14 +00:00
Nico Rieck ba848e3bca Replace coff-/elf-dump with llvm-readobj
llvm-svn: 179361
2013-04-12 04:06:46 +00:00
Rafael Espindola 79ef75dc49 Print st_bind with the correct number of bits.
llvm-svn: 136874
2011-08-04 15:10:35 +00:00
Rafael Espindola 65c559c5fb Change anther counter to decimal.
llvm-svn: 136870
2011-08-04 14:01:03 +00:00
Rafael Espindola 1557fd6d39 Write the section table and the section data in the same order that
gun as does. This makes it a lot easier to compare the output of both
as the addresses are now a lot closer.

llvm-svn: 127972
2011-03-20 18:44:20 +00:00
Jason W Kim e8b3711ae9 Fixing r116753 r116756 r116777
The failures in r116753 r116756 were caused by a python issue -
Python likes to append 'L' suffix to stringified numbers if the number
is larger than a machine int. Unfortunately, this causes a divergence of
behavior between 32 and 64 bit python versions.

I re-crafted elf-dump/common_dump to take care of these issues by:

1. always printing 0x (makes for easy sed/regex)
2. always print fixed length (exactly 2 + numBits/4 digits long)
   by mod ((2^numBits) - 1)
3. left-padded with '0'

There is a residual common routine that is also used by
macho-dump (dataToHex) , so I left the 'section_data' test values alone.

llvm-svn: 116823
2010-10-19 17:39:10 +00:00
Eric Christopher eac5e381cc Speculatively revert 116753 and 116756 to attempt to fix the bots.
llvm-svn: 116777
2010-10-19 00:19:49 +00:00
Jason W Kim eae048885d Changed elf-dump to output hex format by default.
Also updated tests. 

llvm-svn: 116753
2010-10-18 21:32:41 +00:00
Rafael Espindola d03e81dba8 Produce a undefined reference to _GLOBAL_OFFSET_TABLE_ when needed.
llvm-svn: 115623
2010-10-05 15:48:37 +00:00
Rafael Espindola fd1fff8b19 Implement ELF::R_X86_64_GOTPCREL.
llvm-svn: 115547
2010-10-04 19:51:39 +00:00
Rafael Espindola b2c4ca6433 Produce a R_X86_64_GOT32 when needed.
llvm-svn: 115537
2010-10-04 18:44:25 +00:00