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142 Commits

Author SHA1 Message Date
Rafael Espindola 60ebca9aaf The sections that the ELF object writer has to create are very simple and 
contain only data. Handle them specially instead of using AddSectionToTheEnd.
This moves a hack from the generic assembler to the elf writer. It is also
a bit faster and should make other improvements easier.

llvm-svn: 120683
 2010-12-02 03:09:06 +00:00
Jim Grosbach ce2bd8d05f Add support for binary encoding of ARM 'adr' instructions referencing constant 
pool entries (LEApcrel pseudo). Ongoing saga of rdar://8542291.

llvm-svn: 120635
 2010-12-02 00:28:45 +00:00
Owen Anderson 943fb60b1f Add correct encodings for STRD and LDRD, including fixup support. Additionally, update these to unified syntax. 
llvm-svn: 120589
 2010-12-01 19:18:46 +00:00
Jim Grosbach 5695098c4c Fix a mised reloc rename spot. 
llvm-svn: 120585
 2010-12-01 19:02:26 +00:00
Jason W Kim 29805961d8 ARM/MC/ELF relocation "hello world" for movw/movt. 
Lifted adjustFixupValue() from Darwin for sharing w ELF.
Test added
TODO:
  refactor ELFObjectWriter::RecordRelocation more.
  Possibly share more code with Darwin?
  Lots more relocations...

llvm-svn: 120534
 2010-12-01 02:40:06 +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 9f75d5df0b 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 708ac4d6ad 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
Jason W Kim 767a1e9adc Fixed some style issues (no _, no spc after !) 
llvm-svn: 119986
 2010-11-22 22:05:16 +00:00
Jason W Kim 16b75262c4 Make the <ARCH>ELFObjectWriter statics private 
llvm-svn: 119982
 2010-11-22 18:57:00 +00:00
Jason W Kim 84ffdd5cf1 Fix misplaced statics. 
llvm-svn: 119981
 2010-11-22 18:47:05 +00:00
Jason W Kim a262546df7 Kill trailing whitespace 
llvm-svn: 119979
 2010-11-22 18:42:07 +00:00
Jason W Kim 7c7d0ef287 Refactor the ELFRelocationEntry (pull up) and move the arch-specific statics to inside the class where it belongs. 
Next step is to rationally break apart the RecordRelocation()

Probably the step will be to have 1 member function for ech slot of the ELFRelocationEntry()

llvm-svn: 119978
 2010-11-22 18:41:13 +00:00
Wesley Peck 7699d6cfe9 Implement ELF object file writing support for the MBlaze backend. Its not perfect yet, but it works for many tests. 
llvm-svn: 119952
 2010-11-21 22:06:28 +00:00
Rafael Espindola 26cb15a549 Handle PCRel relocations with absolute values. Fixes PR8656. 
llvm-svn: 119917
 2010-11-21 00:48:25 +00:00
Rafael Espindola 7d19efd6ff A bit more of gnu as compatibility when handling relocations with aliases. 
llvm-svn: 119328
 2010-11-16 04:11:46 +00:00
Benjamin Kramer 202d91e433 Fix compiler warnigns. 
llvm-svn: 119175
 2010-11-15 19:20:50 +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
Jason W Kim 96f4c01cb3 Dovetail with Dan Dunbar's rework of ELFObjectWriter. 
Added 2 new subclasses - X86ELFObjectWriter and ARMELFObectWriter.
ARM and X86 require different code for RecordRelocation(), possibly others.

llvm-svn: 119149
 2010-11-15 16:18:39 +00:00
Rafael Espindola 240028d11d 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 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 0e3decfcf7 Simplify getSymbolIndexInSymbolTable by setting the actual index of 
the symbols.

llvm-svn: 119022
 2010-11-14 03:12:24 +00:00
Daniel Dunbar fe0c28f4db MC: Simplify Mach-O and ELF object writer implementations. 
- What was I thinking?????

llvm-svn: 118992
 2010-11-13 07:33:40 +00:00
Benjamin Kramer dcc7732f88 MCELF: Copy the symbol name only if we're going to modify it. 
llvm-svn: 118920
 2010-11-12 19:26:04 +00:00
Rafael Espindola a3e9a2298d Initial comdat implementation. 
llvm-svn: 118805
 2010-11-11 18:13:52 +00:00
Rafael Espindola fb6540c112 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 fa7b55754c 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 19fa38000a Remove some explicit arguments to getELFSection. This is 
a leftover from the removal of isExplicit.

llvm-svn: 118774
 2010-11-11 03:40:25 +00:00
Rafael Espindola 5a8d781caa Factor some code into WriteSection. 
llvm-svn: 118733
 2010-11-10 23:36:59 +00:00
Rafael Espindola eb97f59753 Update the section index map after we add the medatada sections. 
llvm-svn: 118728
 2010-11-10 22:34:07 +00:00
Rafael Espindola 1801410fa8 Use SectionIndexMap in WriteSymbolTable to make it a little less brittle. 
llvm-svn: 118725
 2010-11-10 22:16:43 +00:00
Rafael Espindola d634003ebd Factor some code into ComputeIndexMap. 
llvm-svn: 118722
 2010-11-10 21:51:05 +00:00
Rafael Espindola 51d68339a2 Change the String<size> methods to take a fragment instead of a buffer. 
llvm-svn: 118709
 2010-11-10 20:02:59 +00:00
Rafael Espindola 36ef57d2eb Use MCSectionELF in places we know we have an ELF section. 
llvm-svn: 118699
 2010-11-10 19:05:07 +00:00
Rafael Espindola 9bb44a5ce8 Fixed version of 118639 with an extra assert to catch similar problems 
earlier. Implicit bool -> int conversions are evil!

llvm-svn: 118651
 2010-11-09 23:42:07 +00:00
Rafael Espindola 33048f069f Revert previous patch. Missed a case. 
llvm-svn: 118645
 2010-11-09 22:54:38 +00:00
Rafael Espindola 4bdd2724e3 Remove IsExplicit. It was always false. 
llvm-svn: 118639
 2010-11-09 22:37:44 +00:00
Rafael Espindola 1614597873 Implement .weakref. 
llvm-svn: 117911
 2010-11-01 14:28:48 +00:00
Rafael Espindola 3fe87a1eed Add support for files with more than 65280 sections. No testcase since 
it would be a bit too big :-)

llvm-svn: 117849
 2010-10-31 00:16:26 +00:00
Rafael Espindola 45834a0065 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 3c5a54e4b9 Defined weak symbols should have non-zero value. 
llvm-svn: 117585
 2010-10-28 19:39:57 +00:00
Rafael Espindola 29f70afbae Fix relocations with renamed symbols. 
llvm-svn: 117575
 2010-10-28 19:08:03 +00:00
Rafael Espindola 6cd76e63f8 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 936ba3af28 Implement R_X86_64_DTPOFF32. 
llvm-svn: 117548
 2010-10-28 15:11:03 +00:00
Rafael Espindola 2dbec3f762 Implement TLSLD. 
llvm-svn: 117547
 2010-10-28 15:02:40 +00:00
Rafael Espindola e8f08be11c Implement DTPOFF. 
llvm-svn: 117546
 2010-10-28 14:48:59 +00:00
Rafael Espindola 6f23eb380d Implement TLSLDM. 
llvm-svn: 117544
 2010-10-28 14:37:09 +00:00
Rafael Espindola b3b49bbc39 Implement VK_GOTNTPOFF and switch RelocNeedsGOT to use VariantKind. 
llvm-svn: 117543
 2010-10-28 14:22:44 +00:00
Rafael Espindola f8537165bd 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 24c8b04d5f 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