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Commit Graph

123 Commits

Author SHA1 Message Date
Rafael Espindola
c98cc0b286 Fix a crash reduced from gcc produced assembly.
llvm-svn: 121085
2010-12-07 01:09:54 +00:00
Rafael Espindola
3e954d16f4 Second try at making direct object emission produce the same results
as llc + llvm-mc. This time ELF is not changed and I tested that llvm-gcc
bootstrap on darwin10 using darwin9's assembler and linker.

llvm-svn: 121006
2010-12-06 17:27:56 +00:00
Rafael Espindola
9215947c83 There are two reasons why we might want to use
foo = a - b
.long foo
instead of just
.long a - b

First, on darwin9 64 bits the assembler produces the wrong result. Second,
if "a" is the end of the section all darwin assemblers (9, 10 and mc) will not
consider a - b to be a constant but will if the dummy foo is created.

Split how we handle these cases. The first one is something MC should take care
of. The second one has to be handled by the caller.

llvm-svn: 120889
2010-12-04 03:21:47 +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
Daniel Dunbar
6153e5cd7b macho-dump: Fix typo.
llvm-svn: 120185
2010-11-27 04:00:06 +00:00
Rafael Espindola
e3dc1c951c Use multiple 0x66 prefixes so that all nops up to 15 bytes are a single instruction.
llvm-svn: 120147
2010-11-25 17:14:16 +00:00
Kevin Enderby
214e641d8d Added support for the Mach-O .symbol_resolver directive. rdar://8673046
llvm-svn: 119816
2010-11-19 18:39:33 +00:00
Rafael Espindola
53a8ae85b7 Change the 11 byte nop to be a single instruction.
llvm-svn: 119286
2010-11-15 23:10:30 +00:00
Daniel Dunbar
ed92665b19 MC/Mach-O/i386: Fix a crash in relocation handling.
llvm-svn: 114176
2010-09-17 15:21:50 +00:00
Rafael Espindola
f926b1b27d Change section_data dumping to print hex numbers instead of using
python's %r.

llvm-svn: 113685
2010-09-11 15:25:58 +00:00
Chris Lattner
8f621d5039 fix the encoding of the "jump on *cx" family of instructions,
rdar://8061602

llvm-svn: 113343
2010-09-08 04:30:51 +00:00
Kevin Enderby
999057d413 MC/X86: Add aliases for Jcc variants.
llvm-svn: 104890
2010-05-27 21:33:19 +00:00
Eric Christopher
e7166af3b7 Add a quick test of relocations.
llvm-svn: 104794
2010-05-27 00:53:40 +00:00
Eric Christopher
5c5a5be829 Add support for initialized global data for darwin tls. Update comments
and testcases accordingly.

llvm-svn: 104635
2010-05-25 21:28:50 +00:00
Eric Christopher
8c8d643a87 A more combo tls testcase.
llvm-svn: 104163
2010-05-19 21:19:42 +00:00
Eric Christopher
6b51010080 Few more simple tls testcases.
llvm-svn: 104148
2010-05-19 20:35:15 +00:00
Eric Christopher
79cbb29471 Quick test to make sure we're emitting the tbss section correctly.
llvm-svn: 104063
2010-05-18 21:40:20 +00:00
Kevin Enderby
438a36f66a Fixed the problem with a branch to "0b" that was not parsed by llvm-mc
correctly.  The Lexer was incorrectly eating the newline casusing it to branch
to address 0.  Updated the test case to use a "0:" label and a branch to "0b".

llvm-svn: 104038
2010-05-18 17:51:35 +00:00
Daniel Dunbar
739e720a21 MC/Mach-O: Implement support for setting indirect symbol table offset in section header.
Also, create symbol data for LHS of assignment, to match 'as' symbol ordering better.

llvm-svn: 104033
2010-05-18 17:28:24 +00:00
Kevin Enderby
14c986967b Added support in MC for Directional Local Labels.
llvm-svn: 103989
2010-05-17 23:08:19 +00:00
Daniel Dunbar
b18dfe6cb4 MC/Mach-O/x86: Optimal nop sequences should only be used for the .text sections, not all sections in the text segment.
llvm-svn: 103981
2010-05-17 21:54:30 +00:00
Daniel Dunbar
ee5ac7a69b MC/Mach-O: Reverse order of SymbolData scanning when emitting instructions.
- This fixes a string table mismatch with 'as' when two new symbols are defined
   in a single instruction.

llvm-svn: 103979
2010-05-17 21:19:59 +00:00
Daniel Dunbar
80719b2d36 MC/Mach-O: Fix some differences in symbol flag handling.
- Don't clear weak reference flag, 'as' was only "trying" to do this, it wasn't
   actually succeeding.
 - Clear the "lazy bound" bit when we mark something external. This corresponds
   roughly to the lazy clearing of the bit that 'as' implements in
   symbol_table_lookup.
 - The exact meaning of these flags appears pretty loose, since 'as' isn't very
   consistent. For now we just try to match 'as', we will clean this up one day
   hopefully.

llvm-svn: 103964
2010-05-17 20:12:31 +00:00
Daniel Dunbar
89a1d9036a MC/Mach-O/x86_64: Darwin's special "signed_N" relocation types should only be
used to replace a normal relocation, not a reference to a GOT entry.

llvm-svn: 103789
2010-05-14 18:53:40 +00:00
Daniel Dunbar
f254edca8d MC/Mach-O: Add another zerofill test to improve coverage.
llvm-svn: 103691
2010-05-13 01:10:28 +00:00
Daniel Dunbar
e5a79692cf MC/Mach-O/x86_64: Add a new hook for checking whether a particular section can
be diced into atoms, and adjust getAtom() to take this into account.
 - This fixes relocations to symbols in fixed size literal sections, for
   example.

llvm-svn: 103532
2010-05-12 00:38:17 +00:00
Daniel Dunbar
a033860d55 MC/Mach-O/x86_64: Fix PCrel adjustment for x86_64, which was using the fixup
offset instead of the fixup address as intended.

llvm-svn: 103527
2010-05-11 23:53:11 +00:00
Daniel Dunbar
7670f69e42 MC/Mach-O x86_64: Switch to using fragment atom symbol.
- This eliminates getAtomForAddress() (which was a linear search) and
   simplifies getAtom().
 - This also fixes some correctness problems where local labels at the same
   address as non-local labels could be assigned to the wrong atom.

llvm-svn: 103480
2010-05-11 17:22:50 +00:00
Daniel Dunbar
d2c14ce38d MC/Mach-O: Fix another mismatch with .weak_definition, we shouldn't use a
scattered relocation entry with a .weak_definition.

llvm-svn: 103443
2010-05-10 23:15:20 +00:00
Kevin Enderby
3807a4746a Fix i386 relocations to Weak Definitions. The relocation entries should be
external and the item to be relocated should not have the address of the
symbol added in.

llvm-svn: 103302
2010-05-07 21:44:23 +00:00
Daniel Dunbar
9a3d46162f MC/Mach-O: Mark absolute variable's appropriately, and add Mach-O support for
writing them.
 - <rdar://problem/7885351> integrated assembler broken for i386 objc code

llvm-svn: 103112
2010-05-05 19:01:05 +00:00
Daniel Dunbar
f5dc70a7d1 MC/Mach-O/x86_64: Relocations in debug sections should use local relocations
when possible.
 - <rdar://problem/7934873>

llvm-svn: 103092
2010-05-05 17:22:39 +00:00
Daniel Dunbar
f2c7999cd8 MC/Mach-O/x86_64: Support @GOTPCREL on symbols, even for non-PCrel relocations!
llvm-svn: 99853
2010-03-29 23:56:40 +00:00
Daniel Dunbar
cfa1820a7e MC: Fix refacto in MCExpr evaluation, I mistakenly replaced a fragment address with a symbol address.
- This fixes the integrated-as nightly test regressions.

llvm-svn: 99466
2010-03-25 01:03:17 +00:00
Daniel Dunbar
3e9483dbd9 MC/Mach-O: Remove Darwin host specific tests, we don't need them anymore.
llvm-svn: 99100
2010-03-20 22:36:32 +00:00
Daniel Dunbar
97cf61ad35 MC/Mach-O: Tweak optimal_nop test to be host independent.
- This also avoids us running valgrind on /usr/bin/as, which has leaks. :)

llvm-svn: 99099
2010-03-20 22:36:29 +00:00
Kevin Enderby
766909ae3b Fixed the encoding problems of the crc32 instructions. All had the Operand size
override prefix and only the r/m16 forms should have had that.  Also for variant
one, the AT&T syntax, added suffixes to all forms.  Also added the missing
64-bit form for 'CRC32 r64, r/m8'.  Plus added test cases for all forms and
tweaked one test case to add the needed suffixes.

llvm-svn: 98980
2010-03-19 20:04:42 +00:00
Daniel Dunbar
3c66c7a3c1 MC/Mach-O/x86_64: Add relocation support.
- This is "extraordinarily" Darwin 'as' compatible. See the litany of FIXMEs littered about for more information.
 - There are a few cases which seem to clearly be 'as' bugs which I have left unsupported, and there is one cases where we diverge but should fix if it blocks diffing .o files (Darwin 'as' ends up widening a jump unnecessarily).
 - 403.gcc build, runs, and diffs equivalently to the 'as' built version now (using llvm-mc). However, it builds so slowly that I wouldn't recommend trying it quite yet. :)

llvm-svn: 98974
2010-03-19 18:07:55 +00:00
Daniel Dunbar
f8e4be91ff MC/Mach-O: Factor out isScatteredFixupFullyResolvedSimple predicate, and fix some corner cases.
llvm-svn: 98924
2010-03-19 03:18:12 +00:00
Daniel Dunbar
476b525e01 MC/Mach-O/x86_64: Temporary labels in cstring sections require symbols (and external relocations, but we don't have x86_64 relocations yet).
llvm-svn: 98583
2010-03-15 21:56:50 +00:00
Chris Lattner
c90ed01cf3 xfail properly
llvm-svn: 98479
2010-03-14 07:55:34 +00:00
Chris Lattner
3e251f1db0 xfail these tests temporarily to get teh buildbots back to happy land.
llvm-svn: 98476
2010-03-14 07:32:48 +00:00
Daniel Dunbar
eb158a88db MC/X86_64: Symbol support.
llvm-svn: 98456
2010-03-13 22:49:35 +00:00
Daniel Dunbar
fec15da5d7 MC/Mach-O: Initial x86_64 support.
llvm-svn: 98454
2010-03-13 22:10:17 +00:00
Daniel Dunbar
e8b67adb94 MC/Mach-O: PCrel relocations weren't using the right base address, they are
relative to the fragment address, not its offset. This was masked by the text
section normally being at address 0.

llvm-svn: 98420
2010-03-13 02:38:00 +00:00
Daniel Dunbar
8ad9589475 MC/Mach-O: Implement initial support for relaxation.
- The implementation is currently very brain dead and inefficient, but I have a
   clear plan on how to fix it.

 - The good news is, it works and correctly assembles 403.gcc (when built with
   Clang, at '-Os', '-Os -g', and '-O3'). Even better, at '-Os' and '-Os -g',
   the resulting binary is exactly equivalent to that when built with the system
   assembler. So it probably works! :)

llvm-svn: 98396
2010-03-12 22:07:14 +00:00
Daniel Dunbar
ee26fc9e9f MC/Mach-O: Implement "absolutizing" semantics of .set, by evaluating the assembly time value of variables.
llvm-svn: 98241
2010-03-11 05:53:37 +00:00
Daniel Dunbar
14b4e621b0 MC/Mach-O: Use the SECTDIFF relocation type for (A - B + constant) where A is external.
- I'm not sure why, but this is what 'as' does.

llvm-svn: 98115
2010-03-10 00:58:25 +00:00
Daniel Dunbar
f33a8c5ab6 MC/Mach-O: For PCrel relocations, we need to compensate for the PCrel adjustment when determining if we need a scattered relocation.
llvm-svn: 98082
2010-03-09 21:27:58 +00:00
Daniel Dunbar
42f1b1b255 MC/Macho-O: Align the zerofill section itself to the maximum alignment.
llvm-svn: 97991
2010-03-08 22:03:42 +00:00
Daniel Dunbar
3292ad448b MC/Mach-O: Fix address compution for zero fill sections.
llvm-svn: 97984
2010-03-08 21:10:42 +00:00
Kevin Enderby
11cce486ac This is a patch to the assembler frontend to detect when aligning a text
section with TextAlignFillValue and calls EmitCodeAlignment() instead of
calling EmitValueToAlignment().  This allows x86 assembly code to be aligned
with optimal nops.

llvm-svn: 97158
2010-02-25 18:46:04 +00:00
Daniel Dunbar
d01668aaf5 MCAssembler/Darwin: Add a test (on Darwin) that we assemble a bunch of
instructions exactly like 'as', and produce equivalent .o files.

llvm-svn: 95143
2010-02-02 22:00:15 +00:00
Daniel Dunbar
eb0b81040a MC/Mach-O: Set SOME_INSTRUCTIONS bit for sections.
llvm-svn: 95135
2010-02-02 21:44:01 +00:00
Kevin Enderby
ef201aaa04 Fixed MCSectionMachO::ParseSectionSpecifier to allow an attribute of "none" so
that a symbol stub section with no attributes can be parsed as in:
.section __TEXT,__picsymbolstub4,symbol_stubs,none,16

llvm-svn: 83488
2009-10-07 20:57:20 +00:00
Daniel Dunbar
eec2764d55 llvm-mc: Support .comm emission.
llvm-svn: 80351
2009-08-28 07:08:35 +00:00
Daniel Dunbar
5749caa698 llvm-mc: Support .zerofill emission.
- I'm still trying to figure out the cleanest way to implement this and match the assembler, currently there are some substantial differences.

llvm-svn: 80347
2009-08-28 05:49:21 +00:00
Daniel Dunbar
838ad81771 For now, only run MC tests if X86 is configured.
llvm-svn: 80213
2009-08-27 06:11:15 +00:00
Daniel Dunbar
f2e919b79e llvm-mc/Mach-O: Unique sections properly, so we don't get duplicate text
sections, etc.
 - The quick and dirty way, just clone the TargetLoweringObjectFile
   code. Eventually this should be shared... somehow.

llvm-svn: 80168
2009-08-26 22:49:51 +00:00
Daniel Dunbar
1f70368155 llvm-mc/Mach-O: Don't put assembler temporary labels in the symbol table.
- I moved section creation back into AsmParser. I think policy decisions like
   this should be pushed higher, not lower, when possible (in addition the
   assembler has flags which change this behavior, for example).

llvm-svn: 80162
2009-08-26 22:13:22 +00:00
Daniel Dunbar
5e9b7483b7 llvm-mc/Mach-O: Set .subsections_via_symbols flag properly.
llvm-svn: 80144
2009-08-26 21:22:22 +00:00
Daniel Dunbar
8c38017009 llvm-mc/Mach-O: Add support for relocations.
- I haven't really tried to find the "right" way to store the fixups or apply
   them, yet. This works, but isn't particularly elegant or fast.

 - Still no evaluation support, so we don't actually ever not turn a fixup into
   a relocation entry.

llvm-svn: 80089
2009-08-26 13:58:10 +00:00
Daniel Dunbar
bcea5b0d3e llvm-mc: Fix tests for python variations in int printing, sigh.
llvm-svn: 80069
2009-08-26 04:28:45 +00:00
Daniel Dunbar
982f304aac llvm-mc/Mach-O: Add section padding where needed (to align the next section).
Also, simplify some of Mach-O writer code which can now use section addresses.

llvm-svn: 80067
2009-08-26 04:13:32 +00:00
Daniel Dunbar
a36793b5b5 llvm-mc/Mach-O: Set addresses for symbols.
llvm-svn: 80065
2009-08-26 02:48:04 +00:00
Daniel Dunbar
6bb1f76970 llvm-mc: Improve indirect symbol support (add the indirect index table).
llvm-svn: 80059
2009-08-26 00:18:21 +00:00
Daniel Dunbar
937b745b68 llvm-mc/Mach-O: Support symbol attributes.
- This is mostly complete, the main thing missing is .indirect_symbol support
   (which would be straight-forward, except that the way it is implemented in
   'as' makes getting an exact .o match interesting).

llvm-svn: 79899
2009-08-24 08:40:12 +00:00
Daniel Dunbar
4c3cf93d1d llvm-mc/Mach-O: Improve symbol table support:
- Honor .globl.

 - Set symbol type and section correctly ('nm' now works), and order symbols
   appropriately.

 - Take care to the string table so that the .o matches 'as' exactly (for ease
   of testing).

llvm-svn: 79740
2009-08-22 11:41:10 +00:00
Daniel Dunbar
260235bc1a Force triple for these tests.
llvm-svn: 79737
2009-08-22 09:45:43 +00:00
Daniel Dunbar
15dbbf3644 llvm-mc: Improve handling of implicit alignment for magic section directives
(e.g., .objc_message_refs).
 - Just emit a .align when we see the directive; this isn't exactly what 'as'
   does but in practice it should be ok, at least for now. See FIXME.

llvm-svn: 79697
2009-08-21 23:30:15 +00:00
Daniel Dunbar
aa60fad397 llvm-mc/Mach-O: Support .o emission for .org and .align.
llvm-svn: 79684
2009-08-21 23:07:38 +00:00
Daniel Dunbar
ca9ad524dc llvm-mc/Mach-O: Support byte and fill value emission.
llvm-svn: 79652
2009-08-21 18:29:01 +00:00
Daniel Dunbar
7e81ff0f87 llvm-mc: Start MCAssembler and MCMachOStreamer.
- Together these form the (Mach-O) back end of the assembler.

 - MCAssembler is the actual assembler backend, which is designed to have a
   reasonable API. This will eventually grow to support multiple object file
   implementations, but for now its Mach-O/i386 only.

 - MCMachOStreamer adapts the MCStreamer "actions" API to the MCAssembler API,
   e.g. converting the various directives into fragments, managing state like
   the current section, and so on.

 - llvm-mc will use the new backend via '-filetype=obj', which may eventually
   be, but is not yet, since I hear that people like assemblers which actually
   assemble.

 - The only thing that works at the moment is changing sections. For the time
   being I have a Python Mach-O dumping tool in test/scripts so this stuff can
   be easily tested, eventually I expect to replace this with a real LLVM tool.

 - More doxyments to come.

I assume that since this stuff doesn't touch any of the things which are part of
2.6 that it is ok to put this in not so long before the freeze, but if someone
objects let me know, I can pull it.

llvm-svn: 79612
2009-08-21 09:11:24 +00:00