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86 Commits

Author SHA1 Message Date
Daniel Dunbar ab14a6f174 MC/Mach-O/Thumb: Set the thumb bit in the symbol table. 
llvm-svn: 122630
 2010-12-29 14:14:06 +00:00
Daniel Dunbar a895c69431 MC/Mach-O/Thumb: Select appropriate relocation types for Thumb. 
llvm-svn: 122583
 2010-12-27 14:49:49 +00:00
Daniel Dunbar 7f2bb4dcae MC/Mach-O/ARM: Start handling some Thumb branches. 
llvm-svn: 122547
 2010-12-24 16:41:46 +00:00
Daniel Dunbar ac8173cf71 MC/Mach-O/ARM: Don't try to use scattered relocs for BR24 fixups. 
llvm-svn: 122441
 2010-12-22 21:26:43 +00:00
Rafael Espindola 1af01a69d4 Add reduced test from 8845. 
llvm-svn: 122438
 2010-12-22 21:15:13 +00:00
Daniel Dunbar 45140d2efc MC/Mach-O/ARM: We always use the SECTDIFF reloc type on ARM, which is 
esp. important given that the LOCAL_SECTDIFF enumeration got redefined.

llvm-svn: 122412
 2010-12-22 16:52:19 +00:00
Daniel Dunbar 9ccf843a61 MC/Mach-O/ARM: Add enough relocation logic to get BR24 relocations. 
llvm-svn: 122407
 2010-12-22 16:19:24 +00:00
Daniel Dunbar 137d422e50 MC/Expr: Implemnt more aggressive folding during symbol evaluation using 
IsSymbolRefDifferenceFullyResolved(). For example, we will now fold away
something like:
--
_a:
...
L0:
...
L1:
...
.long (L1 - L0) / 2
--

llvm-svn: 122043
 2010-12-17 05:50:33 +00:00
Rafael Espindola 844f6b6cfb Relax alignment fragments. 
With this we don't need the EffectiveSize field anymore. Without that field
LayoutFragment only updates offsets and we don't need to invalidate the
current fragment when it is relaxed (only the ones following it).

This is also a very small improvement in the accuracy of the layout info as
we now use the after relaxation size immediately.

llvm-svn: 121857
 2010-12-15 08:45:53 +00:00
Rafael Espindola 8911d03504 Patch by David Meyer to avoid a O(N^2) behaviour when relaxing fragments. 
Since we now don't update addresses so early, we might relax a bit more than
we need to. This is simillar to the issue in PR8467.

llvm-svn: 121856
 2010-12-15 07:39:29 +00:00
Rafael Espindola e78d3b38de Fix absolute recording of differences of symbols in two sections. Reduced from ctor_dtor_count-2.cpp. 
llvm-svn: 121152
 2010-12-07 17:12:32 +00:00
Rafael Espindola bdbe5a712d Fix relocations with weak definitions. 
llvm-svn: 121114
 2010-12-07 05:57:28 +00:00
Rafael Espindola 2eabaae459 Fix pcrel relocations that cross sections. 
llvm-svn: 121107
 2010-12-07 03:50:14 +00:00
Rafael Espindola a2421ec705 Fix a crash reduced from gcc produced assembly. 
llvm-svn: 121085
 2010-12-07 01:09:54 +00:00
Rafael Espindola 44bbe36de6 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 1c8ac8f027 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 1048e75fb9 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 1440fd3539 macho-dump: Fix typo. 
llvm-svn: 120185
 2010-11-27 04:00:06 +00:00
Rafael Espindola 7c2acd022e 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 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 d1993eb2a4 Change the 11 byte nop to be a single instruction. 
llvm-svn: 119286
 2010-11-15 23:10:30 +00:00
Daniel Dunbar 35a7a0ee2e MC/Mach-O/i386: Fix a crash in relocation handling. 
llvm-svn: 114176
 2010-09-17 15:21:50 +00:00
Rafael Espindola 2833e392ab 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 4703cb4a96 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 9738f64bd9 MC/X86: Add aliases for Jcc variants. 
llvm-svn: 104890
 2010-05-27 21:33:19 +00:00
Eric Christopher 8ae57895f5 Add a quick test of relocations. 
llvm-svn: 104794
 2010-05-27 00:53:40 +00:00
Eric Christopher 19a4b843cc 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 63476ddae6 A more combo tls testcase. 
llvm-svn: 104163
 2010-05-19 21:19:42 +00:00
Eric Christopher b95493c495 Few more simple tls testcases. 
llvm-svn: 104148
 2010-05-19 20:35:15 +00:00
Eric Christopher 7f173d1d27 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 53e0631516 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 d5563f420a 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 0510b48fd9 Added support in MC for Directional Local Labels. 
llvm-svn: 103989
 2010-05-17 23:08:19 +00:00
Daniel Dunbar bb166bed40 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 b7b796cc11 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 0211a96989 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 2493ddfe42 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 e35c88d5ad MC/Mach-O: Add another zerofill test to improve coverage. 
llvm-svn: 103691
 2010-05-13 01:10:28 +00:00
Daniel Dunbar ba2f4c3884 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 53ce0e12d8 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 3937e28da0 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 75778984f9 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 51bed9c870 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 f3a53baf00 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 027fa5f31c 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 c95156262d 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 5caf2ff561 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 98055cc154 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 9f4f9f9cf4 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 cf0843ed93 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