Commit Graph

16 Commits

Author SHA1 Message Date
Daniel Jasper
a174e575c4 Revert r240302 ("Bring r240130 back.").
This causes errors like:

  ld: error: blah.o: requires dynamic R_X86_64_PC32 reloc against '' which
  may overflow at runtime; recompile with -fPIC
  blah.cc:function f(): error: undefined reference to ''
  blah.o:g(): error: undefined reference to ''

I have not yet come up with an appropriate reproduction.

llvm-svn: 240394
2015-06-23 11:31:32 +00:00
Rafael Espindola
1bd232f704 Bring r240130 back.
Now that pr23900 is fixed, we can bring it back with no changes.

Original message:

Make all temporary symbols unnamed.

What this does is make all symbols that would otherwise start with a .L
(or L on MachO) unnamed.

Some of these symbols still show up in the symbol table, but we can just
make them unnamed.

In order to make sure we produce identical results when going thought assembly,
all .L (not just the compiler produced ones), are now unnamed.

Running llc on llvm-as.opt.bc, the peak memory usage goes from 208.24MB to
205.57MB.

llvm-svn: 240302
2015-06-22 17:52:52 +00:00
Nico Weber
cea0f30bb1 Revert 240130, it caused crashes (repro in PR23900).
llvm-svn: 240193
2015-06-19 23:43:47 +00:00
Rafael Espindola
41c3ae17be Make all temporary symbols unnamed.
What this does is make all symbols that would otherwise start with a .L
(or L on MachO) unnamed.

Some of these symbols still show up in the symbol table, but we can just
make them unnamed.

In order to make sure we produce identical results when going thought assembly,
all .L (not just the compiler produced ones), are now unnamed.

Running llc on llvm-as.opt.bc, the peak memory usage goes from 208.24MB to
205.57MB.

llvm-svn: 240130
2015-06-19 12:16:55 +00:00
Rafael Espindola
e4278af625 Omit unused section symbols from the symbol table.
Section symbols exist as an optimization: instead of having multiple relocations
point to different symbols, many of them can point to a single section symbol.

When that optimization is unused, a section symbol is also unused and adds no
extra information to the object file.

This saves a bit of space on the object files and makes the output of
llvm-objdump -t easier to read and consequently some tests get quite a bit
simpler.

llvm-svn: 239045
2015-06-04 15:33:30 +00:00
Rafael Espindola
518baef93e Update tests to not be as dependent on section numbers.
Many of these predate llvm-readobj. With elf-dump we had to match
a relocation to symbol number and symbol number to symbol name or
section number.

llvm-svn: 235015
2015-04-15 15:59:37 +00:00
Rafael Espindola
0c7c337bd7 Work around gold bug http://sourceware.org/PR16794.
llvm-svn: 205416
2014-04-02 12:15:20 +00:00
Rafael Espindola
5b34d5a3c7 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
1162bb7a1d Replace coff-/elf-dump with llvm-readobj
llvm-svn: 179361
2013-04-12 04:06:46 +00:00
Rafael Espindola
b16f4e78a4 Fix the bitwidth of the remaining fields.
llvm-svn: 136884
2011-08-04 17:00:11 +00:00
Rafael Espindola
368850841d print st_type with the correct number of bits.
llvm-svn: 136875
2011-08-04 15:24:00 +00:00
Rafael Espindola
e08bb3d50f Print st_bind with the correct number of bits.
llvm-svn: 136874
2011-08-04 15:10:35 +00:00
Rafael Espindola
f65dd30907 Print r_type with the correct number of bits.
llvm-svn: 136872
2011-08-04 14:39:30 +00:00
Rafael Espindola
edfafcbfb0 Change anther counter to decimal.
llvm-svn: 136870
2011-08-04 14:01:03 +00:00
Rafael Espindola
b5c6ae67ac 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
Evan Cheng
5f20fa7fed Convert MC tests to .s so codegen changes won't break them.
llvm-svn: 122786
2011-01-03 23:47:14 +00:00