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245 Commits

Author SHA1 Message Date
Rafael Espindola
4ef1268b39 Gas is very inconsistent about when a relaxation/relocation is needed. Do 
the right thing and stop trying to copy it. Fixes PR8944.

llvm-svn: 125648
 2011-02-16 03:25:55 +00:00
Roman Divacky
f817c82cf3 Add support for specifying register name in cfi-register/offset/def 
as well as register number.

llvm-svn: 124379
 2011-01-27 17:16:37 +00:00
Rafael Espindola
f290466899 Jörg Sonnenberger noticed that we were missing this test. 
llvm-svn: 124139
 2011-01-24 19:40:38 +00:00
Rafael Espindola
ead58a5259 Handle strings in section names the same way as gas: 
* If the name is a single string, we remove the quotes
* If the name starts without a quote, we include any quotes in the name

llvm-svn: 124127
 2011-01-24 18:02:54 +00:00
Rafael Espindola
547873da60 Add support for the --noexecstack option. 
llvm-svn: 124077
 2011-01-23 17:55:27 +00:00
Rafael Espindola
14333be1af Add support for lowercase variants. 
llvm-svn: 124071
 2011-01-23 16:11:25 +00:00
Rafael Espindola
aefd549139 Delay the creation of eh_frame so that the user can change the defaults. 
Add support for SHT_X86_64_UNWIND.

llvm-svn: 124059
 2011-01-23 05:43:40 +00:00
Rafael Espindola
9afb7af08a Update tests. 
llvm-svn: 123591
 2011-01-16 18:02:57 +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
Rafael Espindola
e223c0aa14 Fix PR8878. 
llvm-svn: 122658
 2011-01-01 19:05:35 +00:00
Rafael Espindola
7b1b3f5d82 Correctly encode pcrel|indirect. 
llvm-svn: 122624
 2010-12-29 04:31:26 +00:00
Rafael Espindola
0408a378e9 Fix bug when trying to output uint16_t or uint32_t. 
llvm-svn: 122615
 2010-12-29 02:30:49 +00:00
Rafael Espindola
d51ed1fc6a Implement cfi_def_cfa. Also don't convert to dwarf reg numbers twice. Looks 
like 6 is a fixed point of that and so the previous tests were OK :-)

llvm-svn: 122614
 2010-12-29 01:42:56 +00:00
Rafael Espindola
257de5c4a2 Implement cfi_def_cfa_register. 
llvm-svn: 122612
 2010-12-29 00:26:06 +00:00
Rafael Espindola
061209eaf3 Initial .cfi_offset implementation. 
llvm-svn: 122611
 2010-12-29 00:09:59 +00:00
Rafael Espindola
d93ec3572d Don't produce a "DW_CFA_advance_loc 0". 
llvm-svn: 122609
 2010-12-28 23:38:03 +00:00
Rafael Espindola
3fdd045643 Implement .cfi_remember_state and .cfi_restore_state. 
llvm-svn: 122602
 2010-12-28 18:36:23 +00:00
Rafael Espindola
c97d642bf7 Relax address updates in the eh_frame section. 
llvm-svn: 122591
 2010-12-28 05:39:27 +00:00
Rafael Espindola
0552cb0638 Start adding basic support for emitting the call frame instructions. 
llvm-svn: 122590
 2010-12-28 04:15:37 +00:00
Rafael Espindola
12c30aed07 Add support for .cfi_lsda. 
llvm-svn: 122584
 2010-12-27 15:56:22 +00:00
Rafael Espindola
7f947794d7 Handle reloc_riprel_4byte_movq_load. Should make the bots happy. 
llvm-svn: 122579
 2010-12-27 02:03:24 +00:00
Rafael Espindola
e7e67fce10 Add support for the same encodings of the personality function that gnu as 
supports.

llvm-svn: 122577
 2010-12-27 00:36:05 +00:00
Rafael Espindola
2ebe553431 Add support for @note. Patch by Jörg Sonnenberger. 
llvm-svn: 122568
 2010-12-26 21:30:59 +00:00
Rafael Espindola
99f1527316 Add basic support for .cfi_personality. 
llvm-svn: 122566
 2010-12-26 20:20:31 +00:00
Rafael Espindola
7c995a90fc Simplify the handling of .size expressions. 
llvm-svn: 122404
 2010-12-22 16:03:00 +00:00
Roman Divacky
42b3eee794 Set the value of absolute symbols. 
llvm-svn: 122268
 2010-12-20 21:14:39 +00:00
Roman Divacky
13b5260f62 Print all 64bits for st_value and st_size. Adjust tests accordingly. 
llvm-svn: 122263
 2010-12-20 20:49:43 +00:00
Rafael Espindola
4c1b83e53f Add a test that shows that we produce no fixups when computing the difference 
of two symbols in the same fragment.

llvm-svn: 122145
 2010-12-18 05:07:45 +00:00
Rafael Espindola
dff6c18a5e Test for push being relaxed. 
llvm-svn: 122124
 2010-12-18 01:16:59 +00:00
Rafael Espindola
bd13ceed72 "Fix" FDE alignment to match what gas does. 
llvm-svn: 122006
 2010-12-17 00:28:02 +00:00
Rafael Espindola
3ee4530406 Make pushq produce signed relocations. 
llvm-svn: 122005
 2010-12-16 22:50:01 +00:00
Rafael Espindola
0e665e502d Fixed version of 121434 with no new memory leaks. 
llvm-svn: 121471
 2010-12-10 07:39:47 +00:00
Rafael Espindola
011e168728 Revert my previous patch to make the valgrind bots happy. 
llvm-svn: 121461
 2010-12-10 04:01:09 +00:00
Rafael Espindola
03ad1e8f1f Initial support for the cfi directives. This is just enough to get 
f:
        .cfi_startproc
        nop
        .cfi_endproc

assembled (on ELF).

llvm-svn: 121434
 2010-12-09 23:48:29 +00:00
Rafael Espindola
50b6170457 Next step: Only pad debug_line when the target is darwin. Add a FIXME to avoid 
doing that if the target is darwin10 or newer.

This fixes
*) Direct object emission was producing objects without the workaround on
   darwin9.
*) Assembly printing was producing objects with the workaround on linux.

llvm-svn: 120866
 2010-12-04 00:31:13 +00:00
Benjamin Kramer
84bf47f2d8 Fix some broken CHECK lines. 
llvm-svn: 120332
 2010-11-29 22:34:55 +00:00
Rafael Espindola
a8488b04e1 Factor some code to parseSectionFlags and fix the default type of a section. 
llvm-svn: 120145
 2010-11-25 15:32:56 +00:00
Rafael Espindola
1a81f03f87 Behave a bit more like gnu as and use the symbol (instead of the section) 
for any relocation to a symbol defined in a tls section.

llvm-svn: 120121
 2010-11-24 21:57:39 +00:00
Rafael Espindola
97690e2d7d Relocate with the symbol if the relocation is of kind NTPOFF. 
Patch by David Meyer, I added the test.

llvm-svn: 120104
 2010-11-24 19:23:50 +00:00
Rafael Espindola
81ecba9559 Fix and add tests for all cases in x86 and x86_64 where gnu as implicitly 
sets the type of a symbol to STT_TLS.

llvm-svn: 120100
 2010-11-24 18:51:21 +00:00
Rafael Espindola
dc299d2615 If a symbol is used as tls, mark it as tls even if not declare as so. Probably 
fixes PR8659.

llvm-svn: 120076
 2010-11-24 02:19:40 +00:00
Rafael Espindola
6f069fc35f Produce a relocation for pcrel absolute values. Based on a patch by David Meyer. 
llvm-svn: 120006
 2010-11-23 07:20:12 +00:00
Rafael Espindola
ee6aea622f Handle PCRel relocations with absolute values. Fixes PR8656. 
llvm-svn: 119917
 2010-11-21 00:48:25 +00:00
Rafael Espindola
b6fcca35a2 Add support for .int. 
llvm-svn: 119512
 2010-11-17 16:24:40 +00:00
Rafael Espindola
9186952072 Add support for .2byte, .4byte and .8byte. 
Fixes PR8631.

llvm-svn: 119511
 2010-11-17 16:15:42 +00:00
Rafael Espindola
47e7ef8c8f A bit more of gnu as compatibility when handling relocations with aliases. 
llvm-svn: 119328
 2010-11-16 04:11:46 +00:00
Rafael Espindola
1f6440b1e2 Change MCExpr::EvaluateAsRelocatableImpl of variables to return the original 
variable if recursing fails to simplify it.

Factor AliasedSymbol to be a method of MCSymbol.

Update MCAssembler::EvaluateFixup to match the change in
EvaluateAsRelocatableImpl.

Remove the WeakRefExpr hack, as the object writer now sees the weakref with
no extra effort needed.

Nothing else is using MCTargetExpr, but keep it for now.

Now that the ELF writer sees relocations with aliases, handle

    .weak    foo2
foo2:
    .weak    bar2
    .set    bar2,foo2
    .quad    bar2

the same way gas does and produce a relocation with bar2.

llvm-svn: 119152
 2010-11-15 16:33:49 +00:00
Rafael Espindola
f6c0121c93 Fix PR8565. 
This moves most of the isUsed logic to the MCSymbol itself. With this we
get a bit more relaxed about allowing definitions after uses: uses that
don't evaluate their argument immediately (jmp foo) are accepted.

ddunbar, this was the smallest compromise I could think of that lets us
accept gcc (and clang!) assembly.

llvm-svn: 119144
 2010-11-15 14:40:36 +00:00
Rafael Espindola
5572cb1aed Move the logic to decide with which symbol we produce a relocation (if any) to 
a central location. This also makes us a bit more compatible with gas.

llvm-svn: 119094
 2010-11-14 23:53:26 +00:00
Rafael Espindola
59a93284d7 Fix another case of a .comm directive without a corresponding .type 
directive.

llvm-svn: 119073
 2010-11-14 21:11:16 +00:00
Rafael Espindola
1884e6d475 Fix the type of a symbol created with .comm and no corresponding .type. 
llvm-svn: 119060
 2010-11-14 19:40:55 +00:00
Rafael Espindola
444d9c0b02 Handle a peculiar comdat case: Creating a section with an undefined 
signature symbol causes a local symbol to be created unless there is
some other use of the symbol.

llvm-svn: 119026
 2010-11-14 04:17:37 +00:00
Rafael Espindola
9cd0fd30e0 Parse and record the gnu_unique_object type. 
llvm-svn: 118980
 2010-11-13 04:51:02 +00:00
Rafael Espindola
e296fd654b Fix the encoding of negative line deltas. 
llvm-svn: 118962
 2010-11-13 01:06:27 +00:00
Rafael Espindola
dc54b2b285 gnu as support both % and @ before types, do the same. 
llvm-svn: 118893
 2010-11-12 15:47:08 +00:00
Rafael Espindola
1725702868 Mark labels declared in tls sections as STT_TLS. This matches the behavior of 
gas.

llvm-svn: 118818
 2010-11-11 19:04:55 +00:00
Rafael Espindola
8555d32c9e Initial comdat implementation. 
llvm-svn: 118805
 2010-11-11 18:13:52 +00:00
Rafael Espindola
f7b3bb84e8 Make AliasedSymbol able to handle MCTargetExpr. They can get here if 
a weakref is used with a VariantKind.

llvm-svn: 118798
 2010-11-11 17:24:43 +00:00
Rafael Espindola
f1ee36c3a3 Fix the symbol index of weak references. Also make RecordRelocation a bit 
easier to read by having const references to the symbol, aliased symbol and
renamed symbol.

llvm-svn: 118793
 2010-11-11 16:48:11 +00:00
Rafael Espindola
1602d991d5 Set default flags for .rodata. 
llvm-svn: 118395
 2010-11-08 02:47:59 +00:00
Rafael Espindola
877bb5ba4b Relax dwarf line fragments. This fixes a crash in the included testcase. 
llvm-svn: 118365
 2010-11-07 02:07:12 +00:00
Rafael Espindola
1db6a21aff Add support for expressions in .sleb/.uleb directives. 
llvm-svn: 118023
 2010-11-02 17:22:24 +00:00
Rafael Espindola
eff645265a Fix test. 
llvm-svn: 117932
 2010-11-01 17:10:53 +00:00
Rafael Espindola
2f114f8430 Write the line info to .debug_line. 
llvm-svn: 117930
 2010-11-01 17:07:14 +00:00
Rafael Espindola
7a38cb0144 Implement .weakref. 
llvm-svn: 117911
 2010-11-01 14:28:48 +00:00
Rafael Espindola
0d9ac34ffa 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.

llvm-svn: 117735
 2010-10-29 23:09:31 +00:00
Rafael Espindola
913ce7ebc8 Improvements to .section parsing: 
* If we have a M or a G, reject sections without the type
* Only parse the flag specific arguments if we have M or G
* Parse the corresponding arguments for M and G

We ignore the G arguments and flag for now.

llvm-svn: 117608
 2010-10-28 21:33:33 +00:00
Rafael Espindola
f230319275 Defined weak symbols should have non-zero value. 
llvm-svn: 117585
 2010-10-28 19:39:57 +00:00
Rafael Espindola
862d688cbd Fix relocations with renamed symbols. 
llvm-svn: 117575
 2010-10-28 19:08:03 +00:00
Rafael Espindola
e62cf892ae 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.

llvm-svn: 117570
 2010-10-28 18:33:03 +00:00
Rafael Espindola
ff7e4e4e43 Implement R_X86_64_DTPOFF32. 
llvm-svn: 117548
 2010-10-28 15:11:03 +00:00
Rafael Espindola
1d1ff5485c Implement TLSLD. 
llvm-svn: 117547
 2010-10-28 15:02:40 +00:00
Rafael Espindola
8372247e83 Implement DTPOFF. 
llvm-svn: 117546
 2010-10-28 14:48:59 +00:00
Rafael Espindola
c44c5b374a Implement TLSLDM. 
llvm-svn: 117544
 2010-10-28 14:37:09 +00:00
Rafael Espindola
d8ef67f8b9 Implement VK_GOTNTPOFF and switch RelocNeedsGOT to use VariantKind. 
llvm-svn: 117543
 2010-10-28 14:22:44 +00:00
Rafael Espindola
68ec803155 Add support for R_386_TLS_GD, R_386_TLS_LE_32, R_386_TLS_IE and R_386_TLS_LE. 
llvm-svn: 117494
 2010-10-27 21:23:52 +00:00
Rafael Espindola
2ea1239070 Implement R_X86_64_GOTTPOFF, R_X86_64_TLSGD and R_X86_64_TPOFF32. 
llvm-svn: 117481
 2010-10-27 20:28:07 +00:00
Rafael Espindola
4db628cd34 Set default type and flags for .init and .fini. 
llvm-svn: 117471
 2010-10-27 18:45:20 +00:00
Rafael Espindola
ca302c994a Produce an error for an invalid use of .symver. 
llvm-svn: 117462
 2010-10-27 17:56:18 +00:00
Rafael Espindola
58a0ea80a4 Symbols defined as the difference of other two end up in the ABS section. 
llvm-svn: 117451
 2010-10-27 16:04:30 +00:00
Rafael Espindola
23d05a8675 Add support for the .symver directive. This is really ugly, but most of it is 
contained in the ELF object writer.

llvm-svn: 117448
 2010-10-27 15:18:17 +00:00
Rafael Espindola
50d3c29c30 Add support for .ident. 
llvm-svn: 117389
 2010-10-26 19:35:47 +00:00
Rafael Espindola
e38790534e Implement some relaxations for arithmetic instructions. The limitation 
on RIP relative relocations looks artificial, but this is a superset of
what we were able to do before.

llvm-svn: 117364
 2010-10-26 14:09:12 +00:00
Rafael Espindola
69c973fbfd Do not recurse into symbol refs that have a variant kind. This prevents us 
from losing the variant when producing a relocation on an alias.

llvm-svn: 117037
 2010-10-21 18:00:20 +00:00
Rafael Espindola
0a50bbaee1 Handle _GLOBAL_OFFSET_TABLE_ correctly. 
llvm-svn: 116932
 2010-10-20 16:46:08 +00:00
Jason W Kim
ccbc75257a 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
a039d14f9b 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
a60bcd8bb1 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
9a98116bb7 Implement R_386_GOT32. 
llvm-svn: 116744
 2010-10-18 20:47:21 +00:00
Rafael Espindola
c75defe576 Relocate with .bss instead of using the symbol. Matches gas behavior. 
llvm-svn: 116741
 2010-10-18 20:25:33 +00:00
Rafael Espindola
7cc236c87f Produce ELF::R_386_GOTPC relocations. 
llvm-svn: 116728
 2010-10-18 18:36:12 +00:00
Rafael Espindola
bf9107e924 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
4a7459403a Handle GOTOFF correctly on i386. 
llvm-svn: 116711
 2010-10-18 16:38:04 +00:00
Rafael Espindola
be5c52d2dc 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
9b114d966a 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
2cdc3d6235 Remove some code duplication. 
llvm-svn: 116484
 2010-10-14 16:34:44 +00:00
Rafael Espindola
bfd3c31acf Call InitSections in llc and clang so that the binaries produced by them 
are easier to diff with those produced by llvm-mc.

llvm-svn: 116095
 2010-10-08 19:37:38 +00:00
Rafael Espindola
ed469a30f0 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
6283a4a478 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
d085e53b36 Make sure weak symbols are listed after the local ones. 
llvm-svn: 115795
 2010-10-06 16:47:31 +00:00
Rafael Espindola
0c327e6e77 Correctly handle GOTPCREL relocations. 
llvm-svn: 115793
 2010-10-06 16:23:36 +00:00
Rafael Espindola
8c7f9745de 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
e2bc98a2b2 Implement more alias cases. 
llvm-svn: 115699
 2010-10-05 22:26:43 +00:00
Rafael Espindola
5762077d52 Don't crash in a strange .size directive. 
llvm-svn: 115684
 2010-10-05 21:02:45 +00:00
Rafael Espindola
0b536fb0fb Add support for a fill value in the .zero directive. 
llvm-svn: 115655
 2010-10-05 19:42:57 +00:00
Rafael Espindola
f850cfbc16 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
e829a55e8e Produce a undefined reference to _GLOBAL_OFFSET_TABLE_ when needed. 
llvm-svn: 115623
 2010-10-05 15:48:37 +00:00
Rafael Espindola
9cd97ce8ed Tests that now pass. 
llvm-svn: 115622
 2010-10-05 15:43:32 +00:00
Rafael Espindola
dcac047c7f Implement ELF::R_X86_64_GOTPCREL. 
llvm-svn: 115547
 2010-10-04 19:51:39 +00:00
Rafael Espindola
f7e642c0da Produce a R_X86_64_PLT32 when needed. 
llvm-svn: 115541
 2010-10-04 19:04:13 +00:00
Rafael Espindola
08361a0329 Produce a R_X86_64_GOT32 when needed. 
llvm-svn: 115537
 2010-10-04 18:44:25 +00:00
Jan Wen Voung
9c76bbf90a Add hook in MCSection to decide when to use "optimized nops", for each 
section kind. Previously, optimized nops were only used for MachO.
Also added tests for ELF and COFF.

llvm-svn: 115523
 2010-10-04 17:32:41 +00:00
Rafael Espindola
491c3f9ef7 Include the section address in the computation of the relocation. 
llvm-svn: 115509
 2010-10-04 15:59:01 +00:00
Rafael Espindola
ce6ea76503 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
e209fd8ab7 Implement a very basic PIC case. 
llvm-svn: 115454
 2010-10-03 00:46:57 +00:00
Chris Lattner
0f389ed003 actually, move the elf tests into the existing elf dir. 
llvm-svn: 115416
 2010-10-02 18:53:48 +00:00
Rafael Espindola
5aae0d6863 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
Jan Wen Voung
7df9bf0092 Move logic of determining ELF entsize from the .s printer to initialization 
time. That way, the EntrySize field is initialized for other code paths, 
namely, the .ll -> .o code path.

llvm-svn: 115141
 2010-09-30 05:59:22 +00:00
Rafael Espindola
b371d39f74 Add another test that now passes. 
llvm-svn: 115137
 2010-09-30 04:22:07 +00:00
Rafael Espindola
480ee577ad 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
Jan Wen Voung
0d25ddb1de Have ELFAsmParser.cpp use the already parsed "Size" (entry size) when 
constructing a section. Test for a few cases also included.

llvm-svn: 115132
 2010-09-30 02:41:46 +00:00
Rafael Espindola
3e2630deca 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
96509a5550 Move "local commons" to the end of .bss to match the gnu as behavior. 
llvm-svn: 115037
 2010-09-29 14:52:01 +00:00
Rafael Espindola
1b3d55417c Add a test that I forgot to add with a previous commit. 
llvm-svn: 115036
 2010-09-29 14:40:49 +00:00
Rafael Espindola
c604f87ba4 On elf, undefined symbols can start with .L. 
llvm-svn: 114958
 2010-09-28 16:19:11 +00:00
Rafael Espindola
c4d0ee0b96 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
442f81681e Make sure .text doesn't produce extra alignment. 
llvm-svn: 114895
 2010-09-27 21:40:27 +00:00
Rafael Espindola
e4c0edf697 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
b70ab59ca8 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
909ffec6eb 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
4b0d25a0db 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
ce04ba0f70 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
3cfff6e0c5 Avoid some Mach-O specific alignment being done on ELF. 
llvm-svn: 114594
 2010-09-22 22:27:05 +00:00
Rafael Espindola
a2d73f0a38 Correctly align bss. 
llvm-svn: 114556
 2010-09-22 17:43:04 +00:00
Rafael Espindola
02af3cdd58 Implement support for .local and its "interesting" interactions with .comm. 
llvm-svn: 114382
 2010-09-21 00:24:38 +00:00
Rafael Espindola
78fc1f7f66 Produce a R_X86_64_32 when the value is >=0. 
llvm-svn: 114339
 2010-09-20 19:20:47 +00:00
Rafael Espindola
9c3a9bf8aa Make sure the STT_FILE symbol is the first one in the symbol table. 
llvm-svn: 114285
 2010-09-18 15:03:21 +00:00
Rafael Espindola
32e423fe2b Add test that was missing in my previous commit. 
llvm-svn: 114248
 2010-09-18 00:37:27 +00:00
Rafael Espindola
d542892fc0 Print the address of sections as 0 and create the metadata sections in the 
same order as gnu as.

llvm-svn: 114109
 2010-09-16 19:46:31 +00:00
Rafael Espindola
fa964e153e Make sure that names like .note.GNU-stack are accepted as valid section names. 
llvm-svn: 114091
 2010-09-16 17:05:55 +00:00
Rafael Espindola
58aa9e8010 Add support for the .zero directive. 
llvm-svn: 114077
 2010-09-16 15:03:59 +00:00
Rafael Espindola
8a987c002e Add a InitSections method to the streamer interface. 
The ELF implementation now creates text, data and bss to match the gnu as
behavior.

The text streamer still has the old MachO specific behavior since
the testsuite checks that it will error when a directive is given
before a setting the current section for example.

A nice benefit is that -n is not required anymore when producing
ELF files.

llvm-svn: 114027
 2010-09-15 21:48:40 +00:00
Rafael Espindola
ce9b27497e Add support for leb128 of absolute expressions. 
llvm-svn: 113691
 2010-09-11 16:45:15 +00:00
Benjamin Kramer
8849104392 Add an elf-dumper utility. 
- Output format and some of the code stolen from macho-dump.
- Somewhat incomplete and probably buggy.
- Comes with a very basic test.

llvm-svn: 113488
 2010-09-09 15:00:41 +00:00
Daniel Dunbar
9ced206b3a MC/ELF: Allow null values in virtual sections, ELF doesn't use special 
directives for putting contents in .bss, for example.

llvm-svn: 111376
 2010-08-18 18:22:37 +00:00