gecko/build/unix/elfhack
2011-08-29 19:21:22 +02:00
..
dummy.c Bug 628988 part 1 - Modify elfhack test so that the executable actively calls something from the library. r=tglek,a=sdwilsh 2011-01-28 09:22:58 +01:00
elf.cpp Bug 674888 - Allow elfhack to move .interp sections. r=tglek 2011-08-03 10:28:47 +02:00
elfhack.cpp Bug 678008 - Fix elfhack build in c++0x mode. r=mh+mozilla 2011-08-17 10:12:46 -04:00
elfxx.h Bug 678008 - Fix elfhack build in c++0x mode. r=mh+mozilla 2011-08-17 10:12:46 -04:00
inject.c Bug 606145 part 2 - Import elfhack code. r=tglek,a=bsmedberg 2011-01-24 09:56:40 +01:00
Makefile.in Bug 681588 - Cleanup wrap malloc and its use on Android. r=ted 2011-08-29 19:21:22 +02:00
README Bug 606145 part 2 - Import elfhack code. r=tglek,a=bsmedberg 2011-01-24 09:56:40 +01:00
test.c Bug 537857 part 2 - Avoid --gc-sections removing anything from elfhack test case. r=tglek 2011-06-28 08:25:48 +02:00

Elfhack is a program to optimize ELF binaries for size and cold startup
speed.

Presently, it is quite experimental, though it works well for the target
it was created for: Firefox's libxul.so.

Elfhack currently only does one thing: packing dynamic relocations ;
which ends up being a quite complex task, that can be summarized this
way:
- Remove RELATIVE relocations from the .rel.dyn/.rela.dyn section.
- Inject a small code able to apply relative relocations "by hand"
  after the .rel.dyn/.rela.dyn section.
- Inject a section containing relocative relocations in a different
  and more packed format, after the small code.
- Register the small code as DT_INIT function. Make the small code call
  what was initially the DT_INIT function, if there was one.
- Remove the hole between the new section containing relative
  relocations and the following sections, adjusting offsets and base
  addresses accordingly.
- Adjust PT_LOAD entries to fit new offsets, and add an additional
  PT_LOAD entry when that is necessary to handle the discrepancy between
  offsets and base addresses, meaning the section offsets may yet again
  need adjustments.
- Adjust various DT_* dynamic tags to fit the new ELF layout.
- Adjust section headers.
- Adjust ELF headers.

See http://glandium.org/blog/?p=1177#relocations for some figures.