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78 Commits

Author SHA1 Message Date
Rafael Espindola 8396dd0893 Remove the MCObjectFormat class. 
llvm-svn: 122147
 2010-12-18 05:37:28 +00:00
Rafael Espindola fdaae0d16f Move some data to the TargetWriter. 
llvm-svn: 122134
 2010-12-18 03:27:34 +00:00
Jim Grosbach 97f1de7347 If The ARM WriteNopData() gets an unaligned byte count to pad out, fill in with 
a partial value. rdar://8782954

llvm-svn: 122078
 2010-12-17 19:03:02 +00:00
Jim Grosbach 4416dfa8fb Handle 2 and 4 byte data blob fixup values for ARM. 
llvm-svn: 122075
 2010-12-17 18:39:10 +00:00
Rafael Espindola 6b5e56c2b1 Stub out explicit MCELFObjectTargetWriter interface. 
llvm-svn: 122067
 2010-12-17 17:45:22 +00:00
Rafael Espindola f0e24d426a Move createELFObjectWriter to its own header. 
llvm-svn: 122064
 2010-12-17 16:59:53 +00:00
Daniel Dunbar e054a782fc MC/ARM: Use aggressive symbol folding (important for jump tables, for example). 
llvm-svn: 122044
 2010-12-17 06:00:24 +00:00
Daniel Dunbar d2867f13a0 MC/Target: Remove HasScatteredSymbols target hook variable, which has been 
superceded and was effectively dead.

llvm-svn: 122024
 2010-12-17 02:06:08 +00:00
Daniel Dunbar 03fcccbb47 MC/Mach-O: Lift some MachObjectWriter arguments into the target specific 
interface.

llvm-svn: 121981
 2010-12-16 17:21:02 +00:00
Daniel Dunbar 8888a9604d MC/Mach-O: Stub out explicit MCMachObjectTargetWriter interface. 
llvm-svn: 121973
 2010-12-16 16:09:19 +00:00
Daniel Dunbar 73b8713d7c MC/Mach-O: Move createMachObjectWriter into MCMachObjectWriter.h. 
llvm-svn: 121971
 2010-12-16 16:08:33 +00:00
Daniel Dunbar 0c9d9fdd81 MC: Move target specific fixup info descriptors to TargetAsmBackend instead of 
the MCCodeEmitter, which seems like a better organization.
 - Also, cleaned up some magic constants while in the area.

llvm-svn: 121953
 2010-12-16 03:20:06 +00:00
Bill Wendling 9613a09e5c Remove fixup_arm_thumb_ldst. The code was never calling the "fixup" stuff for 
it. I.e., it was always an immediate value.

llvm-svn: 121932
 2010-12-16 00:50:33 +00:00
Bill Wendling 03e7576dee Add fixups for Thumb LDR/STR instructions. 
llvm-svn: 121858
 2010-12-15 08:51:02 +00:00
Jim Grosbach 509dc2a700 Add support for MC-ized encoding of tLEApcrel and tLEApcrelJT. rdar://8755755 
llvm-svn: 121798
 2010-12-14 22:28:03 +00:00
Owen Anderson f636a64bfe Fix a small bug (typo?) in the fixup for Thumb1 CBZ/CBNZ instructions. 
llvm-svn: 121784
 2010-12-14 19:42:53 +00:00
Jim Grosbach e34793e960 Trailing whitespace 
llvm-svn: 121769
 2010-12-14 16:25:15 +00:00
Owen Anderson 6d375e5637 Second attempt at make Thumb2 LEAs pseudos. This time, perform the lowering much later, which makes the entire 
process cleaner.

llvm-svn: 121735
 2010-12-14 00:36:49 +00:00
Owen Anderson 9a4d42855d Revert r121721, which broke buildbots. 
llvm-svn: 121726
 2010-12-13 22:51:08 +00:00
Owen Anderson 4efa445f3c Make Thumb2 LEA-like instruction into pseudos, which map down to ADR. Provide correct fixups for Thumb2 ADR, 
which is _of course_ different from ARM ADR fixups, or any other Thumb2 fixup.

llvm-svn: 121721
 2010-12-13 22:29:52 +00:00
Owen Anderson 578074b2f3 In Thumb2, direct branches can be encoded as either a "short" conditional branch with a null predicate, or 
as a "long" direct branch.  While the mnemonics are the same, they encode the branch offset differently, and
the Darwin assembler appears to prefer the "long" form for direct branches.  Thus, in the name of bitwise
equivalence, provide encoding and fixup support for it.

llvm-svn: 121710
 2010-12-13 19:31:11 +00:00
Jim Grosbach f588c516b7 Use 32-bit types for 32-bit values. 
llvm-svn: 121709
 2010-12-13 19:25:46 +00:00
Jim Grosbach 3aeb867d74 Trailing whitespace. 
llvm-svn: 121708
 2010-12-13 19:18:13 +00:00
Owen Anderson 235c276442 Attempt to get Thumb2 branch fixups working properly. 
llvm-svn: 121593
 2010-12-10 23:02:28 +00:00
Owen Anderson 4743d75640 Fixups for Thumb2 vldr's need to have the effective PC aligned as well. 
llvm-svn: 121587
 2010-12-10 22:46:47 +00:00
Jim Grosbach e119da1146 Thumb unconditional branch binary encoding. rdar://8754994 
llvm-svn: 121496
 2010-12-10 18:21:33 +00:00
Jim Grosbach 78485ad65e Thumb conditional branch binary encodings. rdar://8745367 
llvm-svn: 121493
 2010-12-10 17:13:40 +00:00
Owen Anderson cb4d8f2e74 Use the new IsAligned fixup flag to improve fixup encodings for Thumb2 branches. This is still not perfect, 
but it gets many more of them correct than it did previously.

llvm-svn: 121414
 2010-12-09 21:34:47 +00:00
Owen Anderson 3ef19d9d48 Fix an issue in some Thumb fixups, where the effective PC address needs to be 4-byte aligned when calculating 
the offset.  Add a new fixup flag to represent this, and use it for the one fixups that I have a testcase for needing
this.  It's quite likely that the other Thumb fixups will need this too, and to have their fixup encoding logic
adjusted accordingly.

llvm-svn: 121408
 2010-12-09 20:27:52 +00:00
Jim Grosbach 68b27eb9d1 Rename CB/CBZ specific fixup accordingly. 
llvm-svn: 121404
 2010-12-09 19:50:12 +00:00
Owen Anderson 3e6ee1db3e Fix Thumb2 fixups for ldr. 
llvm-svn: 121350
 2010-12-09 01:51:07 +00:00
Owen Anderson 14e41271b7 Fix typo in Thumb2 branch fixup. 
llvm-svn: 121342
 2010-12-09 01:02:09 +00:00
Bill Wendling c4d333f02a Attempt to make the bit-twiddling readable resulted in the binary value being 
overwritten.

llvm-svn: 121337
 2010-12-09 00:44:33 +00:00
Bill Wendling 3392bfc8f3 The BLX instruction is encoded differently than the BL, because why not? In 
particular, the immediate has 20-bits of value instead of 21. And bit 0 is '0'
always. Going through the BL fixup encoding was trashing the "bit 0 is '0'"
invariant.

Attempt to get the encoding at slightly more correct with this.

llvm-svn: 121336
 2010-12-09 00:39:08 +00:00
Owen Anderson 302d5fd0d8 Fix Thumb2 BCC encoding and fixups. 
llvm-svn: 121329
 2010-12-09 00:27:41 +00:00
Bill Wendling a7d6aa902a Support the "target" encodings for the CB[N]Z instructions. 
llvm-svn: 121308
 2010-12-08 23:01:43 +00:00
Jim Grosbach 3c68561453 Tweak ARM fixup value adjustments for Thumb to better handle the half-word 
ordering of thumb mode.

llvm-svn: 121280
 2010-12-08 20:32:07 +00:00
Owen Anderson dae32fd206 Improve comment. 
llvm-svn: 121272
 2010-12-08 19:31:11 +00:00
Jim Grosbach d18f98b969 Add initializer. 
llvm-svn: 121262
 2010-12-08 15:36:45 +00:00
Bill Wendling 8a6449c46e Add support for loading from a constant pool. 
llvm-svn: 121226
 2010-12-08 01:57:09 +00:00
Jim Grosbach 87055ed6f4 Let target asm backends see assembler flags as they go by. Use that to handle 
thumb vs. arm mode differences in WriteNopData().

llvm-svn: 121219
 2010-12-08 01:16:55 +00:00
Owen Anderson 72ce453c73 Simplify the byte reordering logic slightly. 
llvm-svn: 121216
 2010-12-08 00:21:33 +00:00
Owen Anderson 0f7142d808 VLDR fixups need special handling under Thumb. While the encoding is the same, 
the order of the bytes in the data stream is flipped around.

llvm-svn: 121215
 2010-12-08 00:18:36 +00:00
Bill Wendling f09c44c7ab Cleanup in the Darwin end. No functionality change. 
llvm-svn: 121198
 2010-12-07 23:11:00 +00:00
Bill Wendling 721724e643 A bit of cleanup: early exit ApplyFixup and cache the Fixup offset. No 
functionality change.

llvm-svn: 121195
 2010-12-07 23:05:20 +00:00
Jim Grosbach 9e1994698d Add fixup for Thumb1 BL/BLX instructions. 
llvm-svn: 121072
 2010-12-06 23:57:07 +00:00
Rafael Espindola 0f30fec0bd Remove the instruction fragment to data fragment lowering since it was causing 
freed data to be read. I will open a bug to track it being reenabled.

llvm-svn: 121028
 2010-12-06 19:08:48 +00:00
Benjamin Kramer eaa536a773 Remove unused variable. 
llvm-svn: 120836
 2010-12-03 19:55:37 +00:00
Jason W Kim d5e6e5459f fix ARM::fixup_arm_branch, cleanup, and share more code between ELF and Darwin 
llvm-svn: 120832
 2010-12-03 19:40:23 +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