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187 Commits

Author SHA1 Message Date
Rafael Espindola
0ed1543d4e Add support for emitting ARM file attributes. 
llvm-svn: 117275
 2010-10-25 17:50:35 +00:00
Rafael Espindola
800fd3533c Add X86::reloc_global_offset_table and use it to have a single place where 
we check for _GLOBAL_OFFSET_TABLE_.

llvm-svn: 117241
 2010-10-24 17:35:42 +00:00
Wesley Peck
1851090515 Making the e_machine configurable by the target backend in ELFObjectWriter. 
llvm-svn: 117099
 2010-10-22 15:52:49 +00:00
Rafael Espindola
ee8d15157a Small cleanups and fixes in preparation for fixing _GLOBAL_OFFSET_TABLE_. 
llvm-svn: 116848
 2010-10-19 19:31:37 +00:00
Rafael Espindola
fba9f74932 Implement R_386_GOT32. 
llvm-svn: 116744
 2010-10-18 20:47:21 +00:00
Rafael Espindola
0a5314fdb3 Relocate with .bss instead of using the symbol. Matches gas behavior. 
llvm-svn: 116741
 2010-10-18 20:25:33 +00:00
Rafael Espindola
3604d4441a Reenable assert. 
llvm-svn: 116738
 2010-10-18 19:33:01 +00:00
Rafael Espindola
e3dc9e2ea1 Produce ELF::R_386_GOTPC relocations. 
llvm-svn: 116728
 2010-10-18 18:36:12 +00:00
Rafael Espindola
257374bb0f Make the bots happy. 
llvm-svn: 116719
 2010-10-18 18:03:28 +00:00
Rafael Espindola
3521f8467d Produce a R_386_PLT32 when needed. Moved the default cases of switches to the 
start for consistency.

llvm-svn: 116715
 2010-10-18 16:58:03 +00:00
Rafael Espindola
4464e0858f Handle GOTOFF correctly on i386. 
llvm-svn: 116711
 2010-10-18 16:38:04 +00:00
Benjamin Kramer
77414757f6 Fix a typo and silence unused variable warnings in -Asserts build. 
llvm-svn: 116685
 2010-10-17 07:38:40 +00:00
Rafael Espindola
4262a22225 Add a MCObjectFormat class so that code common to all targets that use a 
single object format can be shared.

This also adds support for

mov zed+(bar-foo), %eax

on ELF and COFF targets.

llvm-svn: 116675
 2010-10-16 18:23:53 +00:00
Rafael Espindola
84378f0f53 Refactor alias handling to AliasedSymbol. 
llvm-svn: 116600
 2010-10-15 18:25:33 +00:00
Rafael Espindola
fbcf0db7ee Refactor code a bit and avoid creating unnecessary entries in the string 
map.

llvm-svn: 116579
 2010-10-15 15:39:06 +00:00
Rafael Espindola
bee6e9f8e0 Remove some code duplication. 
llvm-svn: 116484
 2010-10-14 16:34:44 +00:00
Rafael Espindola
883936ce0b Another case of 256 sections not being enough :-) 
llvm-svn: 115858
 2010-10-06 22:28:19 +00:00
Rafael Espindola
5f2d6a5cd9 Get binding and visibility info from the the alias, but Type from the symbol 
being aliased.

llvm-svn: 115836
 2010-10-06 21:02:29 +00:00
Rafael Espindola
d444577382 If a symbol is global, reloc against it even if it is in a mergeable section. 
llvm-svn: 115817
 2010-10-06 19:27:21 +00:00
Rafael Espindola
83b2a3337f Make sure weak symbols are listed after the local ones. 
llvm-svn: 115795
 2010-10-06 16:47:31 +00:00
Rafael Espindola
8f3d2c9058 Correctly handle GOTPCREL relocations. 
llvm-svn: 115793
 2010-10-06 16:23:36 +00:00
Rafael Espindola
d7565c3a06 Use a relocation against the symbol if it is a PLT and the symbol is in another 
section. Common because of linkonce sections.

llvm-svn: 115718
 2010-10-05 23:57:26 +00:00
Rafael Espindola
0ad137e98e Implement more alias cases. 
llvm-svn: 115699
 2010-10-05 22:26:43 +00:00
Rafael Espindola
3844da781f 256 sections should be enough for anyone... 
llvm-svn: 115687
 2010-10-05 21:20:07 +00:00
Rafael Espindola
c58a37ea51 Don't crash in a strange .size directive. 
llvm-svn: 115684
 2010-10-05 21:02:45 +00:00
Rafael Espindola
b1d0789357 Implement a simple alias case and refactor the code a bit so that the 
isInSymtab and isLocal logic in the two loops don't get easily out of sync.

llvm-svn: 115643
 2010-10-05 18:01:23 +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
bce26a1ee0 On ELF we need to know which symbols are used in relocations to decide if 
they should be in the symbol table or not. Instead of "guessing", just compute
the symbol table after the relocations are known.

llvm-svn: 115619
 2010-10-05 15:11:03 +00:00
Rafael Espindola
fd1fff8b19 Implement ELF::R_X86_64_GOTPCREL. 
llvm-svn: 115547
 2010-10-04 19:51:39 +00:00
Rafael Espindola
308363336b Move isFixupKindX86PCRel. 
llvm-svn: 115545
 2010-10-04 19:46:28 +00:00
Rafael Espindola
baadbd554a Produce a R_X86_64_PLT32 when needed. 
llvm-svn: 115541
 2010-10-04 19:04:13 +00:00
Rafael Espindola
b2c4ca6433 Produce a R_X86_64_GOT32 when needed. 
llvm-svn: 115537
 2010-10-04 18:44:25 +00:00
Rafael Espindola
da0e3d07b2 Include the section address in the computation of the relocation. 
llvm-svn: 115509
 2010-10-04 15:59:01 +00:00
Rafael Espindola
7c48b06930 Correctly compute the relocation when it is not in the first fragment. 
llvm-svn: 115506
 2010-10-04 15:28:43 +00:00
Rafael Espindola
f70b4e0c2e Implement a very basic PIC case. 
llvm-svn: 115454
 2010-10-03 00:46:57 +00:00
Rafael Espindola
f987d5ea1c Factor some logic into ShouldRelocOnSymbol. This simplifies the code and 
fixes some cases where we were producing relocations with at symbol that
should use a section instead.

llvm-svn: 115194
 2010-09-30 20:18:35 +00:00
Rafael Espindola
70d6e0e0ff Correctly produce R_X86_64_32 or R_X86_64_32S. 
With this patch in

movq    $foo, foo(%rip)
foo:
.long   foo

We produce a R_X86_64_32S for the first relocation and R_X86_64_32 for the
second one.

llvm-svn: 115134
 2010-09-30 03:11:42 +00:00
Rafael Espindola
2ebaee9c75 Make it possible for the MCObjectWriter to decide if a given fixup is fully 
resolved or not. Different object files have different restrictions and
different native assemblers have different idiosyncrasies we want to emulate
for now.

Move the existing MachO logic to the new place and implement an ELF one that
gets fixups to globals right.

llvm-svn: 115131
 2010-09-30 02:22:20 +00:00
Rafael Espindola
01d20a76fe On elf, undefined symbols can start with .L. 
llvm-svn: 114958
 2010-09-28 16:19:11 +00:00
Rafael Espindola
96bfb50c03 Write relocations in the end of the file. This matches what gas does and 
makes files easier to diff.

llvm-svn: 114898
 2010-09-27 22:04:54 +00:00
Rafael Espindola
9735f4ff8d Factor symbol value computation into a function. 
llvm-svn: 114891
 2010-09-27 21:23:02 +00:00
Rafael Espindola
75d65b9a03 Move ELF to HasReliableSymbolDifference=true. Also take the opportunity to put 
symbols defined in merge sections in independent atoms.

llvm-svn: 114786
 2010-09-25 05:42:19 +00:00
Rafael Espindola
cf1f985838 Reapply 114678 and 114667. Reverting them did not fix the bot: 
http://google1.osuosl.org:8011/builders/llvm-gcc-i386-linux-selfhost/builds/69

llvm-svn: 114761
 2010-09-24 21:19:03 +00:00
Rafael Espindola
3843bb9d2c Revert 114678 and 114667 to see if 
http://google1.osuosl.org:8011/builders/llvm-gcc-i386-linux-selfhost

gets happy.

llvm-svn: 114742
 2010-09-24 18:48:08 +00:00
Rafael Espindola
f458f04eb1 Correctly handle weak undefined symbols. Before we would get a invalid binding 
(2 == STB_WEAK | STB_GLOBAL).

llvm-svn: 114690
 2010-09-23 19:55:14 +00:00
Rafael Espindola
6366d1b858 Correctly compute the offset of the symbol. Forgot these bits from the 
last commit.

llvm-svn: 114678
 2010-09-23 18:01:31 +00:00
Rafael Espindola
48e108753b Represent relocations against local symbols as relocations against the section 
they are in. Both ways should be equivalent, but gas produces relocations
against the section.

Roman wrote the patch, I added the test.

llvm-svn: 114667
 2010-09-23 17:25:18 +00:00
Rafael Espindola
2816588eb9 Fix the FIXME. 
llvm-svn: 114639
 2010-09-23 14:14:56 +00:00
Rafael Espindola
0e527b7ed5 Fix typo and add a FIXME. 
llvm-svn: 114570
 2010-09-22 19:04:41 +00:00
Rafael Espindola
461a692c7f Revert unrelated change that was accidentally included in the previous commit. 
llvm-svn: 114383
 2010-09-21 00:40:19 +00:00