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207 Commits

Author SHA1 Message Date
Joerg Sonnenberger 07de07eeea Fix handling of @IDNTPOFF relocations, they need to get STT_TLS. 
While here, add VK_ARM_TPOFF and VK_ARM_GOTTPOFF, too.

llvm-svn: 127780
 2011-03-17 00:35:10 +00:00
Jan Sjödin 771911e28b Split MCEELFStreamer and ELFObjectWriter into .h and .cpp files, so that other components can use them. 
llvm-svn: 126942
 2011-03-03 14:52:12 +00:00
Jan Sjödin 30a52dec93 Make all static functions become static class methods. Move shared (duplicated) functions to new MCELF class. 
llvm-svn: 126686
 2011-02-28 21:45:04 +00:00
Cameron Zwarich fcf51fd298 Roll out r126425 and r126450 to see if it fixes the failures on the buildbots. 
llvm-svn: 126488
 2011-02-25 16:30:32 +00:00
Devang Patel b037383a35 Enable DebugInfo support for COFF object files. 
Patch by Nathan Jeffords!

llvm-svn: 126425
 2011-02-24 21:04:00 +00:00
Rafael Espindola 58ac6e1677 Add support for pushsection and popsection. Patch by Joerg Sonnenberger. 
llvm-svn: 125629
 2011-02-16 01:08:29 +00:00
Rafael Espindola b3eca9bb71 Add support for the --noexecstack option. 
llvm-svn: 124077
 2011-01-23 17:55:27 +00:00
Rafael Espindola 0e7e34e476 Remove more duplicated code. 
llvm-svn: 124056
 2011-01-23 04:43:11 +00:00
Rafael Espindola aea4958ea6 Remove duplicated code. 
llvm-svn: 124054
 2011-01-23 04:28:49 +00:00
Rafael Espindola 9141b611ad Add basic support for .cfi_personality. 
llvm-svn: 122566
 2010-12-26 20:20:31 +00:00
Jason W Kim 4c1386add9 1. ARM/MC/ELF: A few more ELF relocs for .o 
2. Fixed EmitLocalCommonSymbol for ELF (Yes, they exist. :)
   Test added.

llvm-svn: 121951
 2010-12-16 03:12:17 +00:00
Rafael Espindola 0a017a6db2 Fixed version of 121434 with no new memory leaks. 
llvm-svn: 121471
 2010-12-10 07:39:47 +00:00
Rafael Espindola a945a34c73 Revert my previous patch to make the valgrind bots happy. 
llvm-svn: 121461
 2010-12-10 04:01:09 +00:00
Rafael Espindola 56eb741237 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 93e3cf0ebd Sorry for such a large commit. The summary is that only MachO cares about the 
actuall addresses in a .o file, so it is better to let the MachO writer compute
it.

This is good for two reasons. First, areas that shouldn't care about
addresses now don't have access to it. Second, the layout of each section
is independent. I should use this in a subsequent commit to speed it up.

Most of the patch is just removing the section address computation. The two
interesting parts are the change on how we handle padding in the end
of sections and how MachO can get the address of a-b when a and b are in
different sections.

Since now the expression evaluation normally doesn't know the section address,
it will think that a-b needs relocation and let the MachO writer know. Once
it has computed the section addresses, it calls back the expression evaluation
with the section addresses to resolve these expressions.

The remaining problem is the handling of padding. Currently it will create
a special alignment fragment at the end. Since that fragment doesn't update
the alignment of the section, it needs the real address to be computed.

Since now the layout will not compute a-b with a and b in different sections,
the only effect that the special alignment fragment has is update the
address size of the section. This can also be done by the MachO writer.

llvm-svn: 121076
 2010-12-07 00:27:36 +00:00
Rafael Espindola 57ab708bdd Try to resolve symbol differences early, and if successful create a plain 
data fragment. This reduces the time to assemble the test in 8711 from 60s to
54s.

llvm-svn: 120767
 2010-12-03 00:55:40 +00:00
Rafael Espindola 9065bfc692 Move EmitValueToOffset to the ObjectStreamer. 
llvm-svn: 120691
 2010-12-02 05:59:38 +00:00
Rafael Espindola 3fa6fc1450 Add EmitInstToFragment to the generic object streamer. 
llvm-svn: 120690
 2010-12-02 05:44:06 +00:00
Rafael Espindola a084fd6e9d Move EmitValue to MCObjectStreamer. 
llvm-svn: 120269
 2010-11-28 23:08:47 +00:00
Rafael Espindola e5b7415b21 Fixed verson of r120245. 
Factor some duplicated code into MCObjectStreamer::EmitLabel.

llvm-svn: 120248
 2010-11-28 17:18:55 +00:00
Rafael Espindola 1679580cc9 Revert previous patch while I debug the darwin bootstrap failure. 
llvm-svn: 120246
 2010-11-28 16:22:59 +00:00
Rafael Espindola d4b3feb3f7 Factor some duplicated code into MCObjectStreamer::EmitLabel. 
llvm-svn: 120245
 2010-11-28 15:54:36 +00:00
Rafael Espindola b746531c2c Avoid code duplication in the many unsupported EmitGPRel32Value implementations. 
llvm-svn: 120243
 2010-11-28 15:09:24 +00:00
Rafael Espindola 8a3a7923eb Define generic 1, 2 and 4 byte pc relative relocations. They are common 
and at least the 4 byte one will be needed to implement the .cfi_* directives.

llvm-svn: 120240
 2010-11-28 14:17:56 +00:00
Rafael Espindola e98d483b71 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 4e70ac7b68 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
Kevin Enderby 8be14414f6 Added support for the Mach-O .symbol_resolver directive. rdar://8673046 
llvm-svn: 119816
 2010-11-19 18:39:33 +00:00
Rafael Espindola b58867ccba Change some methods in MCDwarf.cpp to be able to handle an arbitrary 
MCStreamer instead of just MCObjectStreamer. Address changes cannot
be as efficient as we have to use DW_LNE_set_addres, but at least
most of the logic is shared.

This will be used so that, with CodeGen still using EmitDwarfLocDirective,
llvm-gcc is able to produce debug_line sections without needing an
assembler that supports .loc.

llvm-svn: 119777
 2010-11-19 02:26:16 +00:00
Rafael Espindola c653a895c8 Add .loc methods to the streamer. 
Next: Add support for the !HasDotLocAndDotFile case to the MCAsmStreamer
and then switch codegen to use it.

llvm-svn: 119384
 2010-11-16 21:20:32 +00:00
Rafael Espindola 8c3039b67b 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 a7d0bed336 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 b05ef7377a 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 7d0ba3464e 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 eba9022652 Fix warning. 
llvm-svn: 119021
 2010-11-14 01:34:31 +00:00
Rafael Espindola 84d031870c 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
Jim Grosbach cbdf7efe1c Add '.code 32' assembler directive to MC streamers. 
llvm-svn: 118309
 2010-11-05 22:40:09 +00:00
Jim Grosbach 5a2c68d308 MC'ize the '.code 16' and '.thumb_func' ARM directives. 
llvm-svn: 118301
 2010-11-05 22:08:08 +00:00
Benjamin Kramer 80bb80f5fc Put class into an anonymous namespace. 
llvm-svn: 118294
 2010-11-05 19:56:38 +00:00
Rafael Espindola 13ddd6d410 Write the line info to .debug_line. 
llvm-svn: 117930
 2010-11-01 17:07:14 +00:00
Rafael Espindola 72b5488680 Move EmitInstruction to MCObjectStreamer so that ELF and MachO can share it. 
llvm-svn: 117925
 2010-11-01 16:27:31 +00:00
Rafael Espindola 1614597873 Implement .weakref. 
llvm-svn: 117911
 2010-11-01 14:28:48 +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 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
Jason W Kim 645f6c2bef Tiny patch for proof-of-concept cleanup of ARMAsmPrinter::EmitStartOfAsmFile() 
Small test for sanity check of resulting ARM .s file.
Tested against -r115129.

llvm-svn: 115133
 2010-09-30 02:45:56 +00:00
Rafael Espindola 53f0bf194a 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 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 dee12d8110 Avoid some Mach-O specific alignment being done on ELF. 
llvm-svn: 114594
 2010-09-22 22:27:05 +00:00
Rafael Espindola 9bac6cb544 Correctly align bss. 
llvm-svn: 114556
 2010-09-22 17:43:04 +00:00
Rafael Espindola f0591c1642 Implement support for .local and its "interesting" interactions with .comm. 
llvm-svn: 114382
 2010-09-21 00:24:38 +00:00
Rafael Espindola f667d929ce 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 9fd2ed9243 Factoring and potential bug fix. The elf "flags" cannot be used as masks. 
For example, setting STT_OBJECT (1) and STT_FUNC (2), should not produce
a STT_SECTION (3).

llvm-svn: 113759
 2010-09-13 17:39:45 +00:00
Roman Divacky 2ef1a589c5 ELF_STB_Local is 0 so setting and checking it must be done specially 
llvm-svn: 113375
 2010-09-08 18:08:40 +00:00
Benjamin Kramer 5af02b0360 Allow MCSA_WeakRef in ELF. Patch by Roman Divacky. 
llvm-svn: 112834
 2010-09-02 17:18:32 +00:00
Benjamin Kramer 6ebea89316 Mark all common symbols external. This is not exactly correct but it lets apps 
link for now and can be adjusted later. Patch by Roman Divacky.

llvm-svn: 112471
 2010-08-30 11:56:55 +00:00
Benjamin Kramer 1f6012479f MCELF: Port EmitInstruction changes from MachO streamer. Patch by Roman Divacky. 
llvm-svn: 112260
 2010-08-27 10:40:51 +00:00
Eli Friedman b20b5249d2 Fix a few warnings in and detabify MCELFStreamer and ELFObjectWriter. 
llvm-svn: 111175
 2010-08-16 19:15:06 +00:00
Matt Fleming 6c1ad4835e Add ELF ObjectWriter and Streamer support. 
I forgot to add these files in commit 111172.

llvm-svn: 111174
 2010-08-16 18:57:57 +00:00