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103 Commits

Author SHA1 Message Date
Rafael Espindola
d179886f05 Be more strict on when we produce an undefined reference. In gas a file with 
just

.type   foo,@object

will produce an undefined reference to foo. On the other hand, a file with
just

.weakref bar, foo

will not. It is somewhat hard to support both in MC since both statements
should create the symbols. It should be possible if we really need to by
adding to the flags, but hopefully that is not necessary.

With this patch we do not produce a undefined reference in any of those cases.
The assembly file needs an actual use for the undefined reference to be
present.

This is in preparation for a patch implementing .weakref.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117735 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-29 23:09:31 +00:00
Rafael Espindola
1973d43792 Defined weak symbols should have non-zero value. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117585 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-28 19:39:57 +00:00
Rafael Espindola
29129728f1 Fix relocations with renamed symbols. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117575 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-28 19:08:03 +00:00
Rafael Espindola
f571f9a8fe Aliases defined with .symver should copy the binding of the symbols they alias. 
Move the existing patching for undefined symbols so that all the patching
is done in the same function.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117570 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-28 18:33:03 +00:00
Rafael Espindola
aa8f1f0135 Implement R_X86_64_DTPOFF32. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117548 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-28 15:11:03 +00:00
Rafael Espindola
b4d1721eff Implement TLSLD. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117547 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-28 15:02:40 +00:00
Rafael Espindola
0cf15d61b7 Implement DTPOFF. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117546 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-28 14:48:59 +00:00
Rafael Espindola
a264f72d3f Implement TLSLDM. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117544 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-28 14:37:09 +00:00
Rafael Espindola
a0a2f8734c Implement VK_GOTNTPOFF and switch RelocNeedsGOT to use VariantKind. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117543 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-28 14:22:44 +00:00
Rafael Espindola
3cede2d0b2 Add support for R_386_TLS_GD, R_386_TLS_LE_32, R_386_TLS_IE and R_386_TLS_LE. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117494 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-27 21:23:52 +00:00
Rafael Espindola
bc82d8b84f Implement R_X86_64_GOTTPOFF, R_X86_64_TLSGD and R_X86_64_TPOFF32. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117481 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-27 20:28:07 +00:00
Benjamin Kramer
07ee63283c Replace pointer arithmetic with StringRef::substr. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117477 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-27 19:53:52 +00:00
Rafael Espindola
83ff4d2b0d Produce an error for an invalid use of .symver. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117462 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-27 17:56:18 +00:00
Rafael Espindola
bf052ac5d1 Symbols defined as the difference of other two end up in the ABS section. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117451 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-27 16:04:30 +00:00
Rafael Espindola
8818213247 Add support for the .symver directive. This is really ugly, but most of it is 
contained in the ELF object writer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117448 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-27 15:18:17 +00:00
Rafael Espindola
a6866969ba Move more logic to isInSymtab and simplify. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117447 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-27 14:44:52 +00:00
Rafael Espindola
cecbc3d282 Add support for emitting ARM file attributes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117275 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-25 17:50:35 +00:00
Rafael Espindola
24ba4f7f5f Add X86::reloc_global_offset_table and use it to have a single place where 
we check for _GLOBAL_OFFSET_TABLE_.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117241 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-24 17:35:42 +00:00
Wesley Peck
eecb858ca8 Making the e_machine configurable by the target backend in ELFObjectWriter. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117099 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-22 15:52:49 +00:00
Rafael Espindola
bd70118f16 Small cleanups and fixes in preparation for fixing _GLOBAL_OFFSET_TABLE_. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116848 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-19 19:31:37 +00:00
Rafael Espindola
eada304793 Implement R_386_GOT32. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116744 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-18 20:47:21 +00:00
Rafael Espindola
ce2d3c5775 Relocate with .bss instead of using the symbol. Matches gas behavior. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116741 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-18 20:25:33 +00:00
Rafael Espindola
24dc9ecdc5 Reenable assert. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116738 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-18 19:33:01 +00:00
Rafael Espindola
aa85c21633 Produce ELF::R_386_GOTPC relocations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116728 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-18 18:36:12 +00:00
Rafael Espindola
9baee3b3a3 Make the bots happy. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116719 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-18 18:03:28 +00:00
Rafael Espindola
9edab3a9e1 Produce a R_386_PLT32 when needed. Moved the default cases of switches to the 
start for consistency.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116715 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-18 16:58:03 +00:00
Rafael Espindola
c97f80efc8 Handle GOTOFF correctly on i386. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116711 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-18 16:38:04 +00:00
Benjamin Kramer
24f1206c7d Fix a typo and silence unused variable warnings in -Asserts build. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116685 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-17 07:38:40 +00:00
Rafael Espindola
f230df9af4 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116675 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-16 18:23:53 +00:00
Rafael Espindola
de89b010b0 Refactor alias handling to AliasedSymbol. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116600 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-15 18:25:33 +00:00
Rafael Espindola
5df0b65e8f Refactor code a bit and avoid creating unnecessary entries in the string 
map.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116579 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-15 15:39:06 +00:00
Rafael Espindola
a0949b50dc Remove some code duplication. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116484 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-14 16:34:44 +00:00
Rafael Espindola
d8e0bfe07a Another case of 256 sections not being enough :-) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115858 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-06 22:28:19 +00:00
Rafael Espindola
152c1061e0 Get binding and visibility info from the the alias, but Type from the symbol 
being aliased.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115836 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-06 21:02:29 +00:00
Rafael Espindola
153666c038 If a symbol is global, reloc against it even if it is in a mergeable section. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115817 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-06 19:27:21 +00:00
Rafael Espindola
3223f19ff0 Make sure weak symbols are listed after the local ones. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115795 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-06 16:47:31 +00:00
Rafael Espindola
8cecf253e4 Correctly handle GOTPCREL relocations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115793 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-06 16:23:36 +00:00
Rafael Espindola
3729d0052b Use a relocation against the symbol if it is a PLT and the symbol is in another 
section. Common because of linkonce sections.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115718 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-05 23:57:26 +00:00
Rafael Espindola
01f9ea35a7 Implement more alias cases. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115699 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-05 22:26:43 +00:00
Rafael Espindola
f5c347dfc2 256 sections should be enough for anyone... 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115687 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-05 21:20:07 +00:00
Rafael Espindola
62fed8bd38 Don't crash in a strange .size directive. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115684 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-05 21:02:45 +00:00
Rafael Espindola
737cd213e3 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115643 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-05 18:01:23 +00:00
Rafael Espindola
5c77c16f31 Produce a undefined reference to _GLOBAL_OFFSET_TABLE_ when needed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115623 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-05 15:48:37 +00:00
Rafael Espindola
8f413fa9c0 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115619 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-05 15:11:03 +00:00
Rafael Espindola
607d1f6d32 Implement ELF::R_X86_64_GOTPCREL. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115547 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-04 19:51:39 +00:00
Rafael Espindola
cebdc01d66 Move isFixupKindX86PCRel. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115545 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-04 19:46:28 +00:00
Rafael Espindola
92bf6684f6 Produce a R_X86_64_PLT32 when needed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115541 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-04 19:04:13 +00:00
Rafael Espindola
28f9ac8101 Produce a R_X86_64_GOT32 when needed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115537 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-04 18:44:25 +00:00
Rafael Espindola
55fb102130 Include the section address in the computation of the relocation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115509 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-04 15:59:01 +00:00
Rafael Espindola
01263d35d4 Correctly compute the relocation when it is not in the first fragment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115506 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-04 15:28:43 +00:00