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239 Commits

Author SHA1 Message Date
Rafael Espindola 073ee7d0a8 Fix comment. 
llvm-svn: 162678
 2012-08-27 16:04:24 +00:00
Jack Carter 8ad0c272af The ELF relocation record format is different for N64 
which many Mips 64 ABIs use than for O64 which many 
if not all other target ABIs use.

Most architectures have the following 64 bit relocation record format:

  typedef struct
  {
    Elf64_Addr   r_offset; /* Address of reference */
    Elf64_Xword  r_info;   /* Symbol index and type of relocation */
  } Elf64_Rel;

  typedef struct
  {
    Elf64_Addr    r_offset;
    Elf64_Xword   r_info;
    Elf64_Sxword  r_addend;
  } Elf64_Rela;

Whereas N64 has the following format:

  typedef struct
  {
    Elf64_Addr    r_offset;/* Address of reference */
    Elf64_Word  r_sym;     /* Symbol index */
    Elf64_Byte  r_ssym;    /* Special symbol */
    Elf64_Byte  r_type3;   /* Relocation type */
    Elf64_Byte  r_type2;   /* Relocation type */
    Elf64_Byte  r_type;    /* Relocation type */
  } Elf64_Rel;

  typedef struct
  {
    Elf64_Addr    r_offset;/* Address of reference */
    Elf64_Word  r_sym;     /* Symbol index */
    Elf64_Byte  r_ssym;    /* Special symbol */
    Elf64_Byte  r_type3;   /* Relocation type */
    Elf64_Byte  r_type2;   /* Relocation type */
    Elf64_Byte  r_type;    /* Relocation type */
    Elf64_Sxword  r_addend;
  } Elf64_Rela;

The structure is the same size, but the r_info data element 
is now 5 separate elements. Besides the content aspects, 
endian byte reordering will be different for the area with 
each element being endianized separately.

I treat this as generic and continue to pass r_type as 
an integer masking and unmasking the byte sized N64 
values for N64 mode. I've implemented this and it causes no 
affect on other current targets.

This passes make check.

Jack

llvm-svn: 159299
 2012-06-27 22:28:30 +00:00
Jim Grosbach dc1e36e9f5 Tidy up. Trailing whitespace. 
llvm-svn: 156602
 2012-05-11 01:41:30 +00:00
Craig Topper 6e80c28017 Prune some includes and forward declarations. 
llvm-svn: 153429
 2012-03-26 06:58:25 +00:00
Akira Hatanaka 64ad2cf1e4 Add a hook in MCELFObjectTargetWriter to allow targets to sort relocation 
entries in the relocation table before they are written out to the file. 

llvm-svn: 153345
 2012-03-23 23:06:45 +00:00
Benjamin Kramer 084b9f4134 Remove a bunch of unused variable assignments. 
Found by the clang static analyzer.

llvm-svn: 148541
 2012-01-20 14:42:32 +00:00
Rafael Espindola 29abd977de Kill the monstrosity that was ELFObjectWriter.h. 
llvm-svn: 147136
 2011-12-22 03:38:00 +00:00
Rafael Espindola 34a68afc05 Misc cleanups. 
llvm-svn: 147135
 2011-12-22 03:24:43 +00:00
Rafael Espindola 1dc45d8df4 Move the Mips only bits of the ELF writer to lib/Target/Mips. 
llvm-svn: 147133
 2011-12-22 03:03:17 +00:00
Rafael Espindola cc369ac0a2 Move the MBlaze ELF writer bits to lib/Target/MBlaze. 
llvm-svn: 147129
 2011-12-22 02:28:24 +00:00
Rafael Espindola 38a400df3b Move PPC bits to lib/Target/PowerPC. 
llvm-svn: 147124
 2011-12-22 01:57:09 +00:00
Akira Hatanaka e2eed9649e Local dynamic TLS model for direct object output. Create the correct TLS MIPS 
ELF relocations.

Patch by Jack Carter.

llvm-svn: 147118
 2011-12-22 01:05:17 +00:00
Rafael Espindola a0124055b1 Move the ARM specific parts of the ELF writer to Target/ARM. 
llvm-svn: 147115
 2011-12-22 00:37:50 +00:00
Rafael Espindola 6faa1533fb getEFlags is const. 
llvm-svn: 147114
 2011-12-22 00:21:50 +00:00
Rafael Espindola f61ff34252 Switch from WriteEFlags to getEFlags in preparation for moving it 
to Target/.

llvm-svn: 147087
 2011-12-21 20:09:46 +00:00
Rafael Espindola b264d33854 Move the X86 specific bits of the ELF writer to the Target/X86 directory. 
Other targets will follow shortly.

llvm-svn: 147060
 2011-12-21 17:30:17 +00:00
Rafael Espindola 1ad4095d6b Reduce the exposure of Triple::OSType in the ELF object writer. This will 
avoid including ADT/Triple.h in many places when the target specific bits are
moved.

llvm-svn: 147059
 2011-12-21 17:00:36 +00:00
Rafael Espindola 9e252bf038 Small refactoring so that RelocNeedsGOT can stay in the target independent 
side when the target specific bits are moved to the Target directory.

llvm-svn: 147053
 2011-12-21 14:26:29 +00:00
Akira Hatanaka e41963ce47 Relocation against a symbol, instead of against section. We had some extreme 
test cases where there were a lot of relocations applied relative to a large
rodata section. Gas would create a symbol for each of these whereas we would
be relative to the beginning of the rodata section. This change mimics what
gas does.

Patch by Jack Carter.

llvm-svn: 146468
 2011-12-13 02:27:40 +00:00
Rafael Espindola 7e0a793183 Handle reloc_signed_4byte in here. Not doing so was a regression from my 
previous commit. It is strange that we see it in 32 bits. We already
have a fixme about it.

llvm-svn: 146273
 2011-12-09 19:57:29 +00:00
Rafael Espindola 0a7f336475 Handle the case of the magical _GLOBAL_OFFSET_TABLE_ showing up in a 
symbol difference. This matches gas behavior and fixes PR11513.

We still don't handle _GLOBAL_OFFSET_TABLE_ in data sections.

llvm-svn: 146238
 2011-12-09 03:03:58 +00:00
Bruno Cardoso Lopes 61e6d987bf Add a few moreLocal/Global R_MIPS_GOT related fixups and 
make the addend fixup code a bit more generic

Patch by Jack Carter.

llvm-svn: 145998
 2011-12-07 00:28:57 +00:00
Bruno Cardoso Lopes 87cfffe149 Explicit symbols for gnu mimicing relocations. Patch by Jack Carter 
llvm-svn: 145911
 2011-12-06 03:34:42 +00:00
Jim Grosbach 46be301c4c Tidy up. Hard tabs. 
llvm-svn: 145878
 2011-12-06 00:13:09 +00:00
Jim Grosbach 18e2fe47fa Switch MCAssembler to method names starting w/ lower-case. 
per http://llvm.org/docs/CodingStandards.html#ll_naming

llvm-svn: 145873
 2011-12-06 00:03:48 +00:00
Akira Hatanaka f5ddf13f79 This patch addresses gp relative fixups/relocations for jump tables. 
llvm-svn: 145112
 2011-11-23 22:18:04 +00:00
Jim Grosbach 0dde349df1 Tidy up. 80 columns. 
llvm-svn: 144649
 2011-11-15 16:46:22 +00:00
Bruno Cardoso Lopes c9473e9809 Add mips ELF relocation types. Patch by Jack Carter! 
llvm-svn: 143738
 2011-11-04 22:24:36 +00:00
Nick Lewycky 29e7b315ac Also create a shndx even if there are no symbols. This lets us test 
.symtab_shndx reading and writing together, and finally we have a testcase for
r141440.

llvm-svn: 141641
 2011-10-11 03:54:50 +00:00
Nick Lewycky 133a16871f Don't emit the symbol table entry for the .symtab_shndx section either. 
llvm-svn: 141440
 2011-10-07 23:29:53 +00:00
Nick Lewycky c6ac5f7388 Remove extraneous curlies. No functionality change. 
llvm-svn: 141439
 2011-10-07 23:28:32 +00:00
Nick Lewycky 8b02d36a23 Don't emit a shstrtabindex in the reserved range. Spotted by inspection and 
patch by Cary Coutant!

llvm-svn: 141413
 2011-10-07 20:58:24 +00:00
Nick Lewycky 4eb1143038 Clarify/fix typo. No functionality change. 
llvm-svn: 141412
 2011-10-07 20:56:23 +00:00
Akira Hatanaka e67a10d54d Add definition of MipsELFObjectWriter. 
Patch by Reed Kotler at Mips Technologies.

llvm-svn: 140891
 2011-09-30 21:55:40 +00:00
Roman Divacky dfbecd1eb7 Introduce adjustFixupOffset that adjusts the fixup offset of a relocation. 
This is meant to be overriden by backends. Implement an override on PowerPC
which adjusts the offset by 2 for ha16/lo16 relocation kinds. This removes
a commented out hack and enables hello world to be compiled on PowerPC.

llvm-svn: 136905
 2011-08-04 19:08:19 +00:00
Rafael Espindola d7facaf371 Add an assert to check that the Addend fits the file format. 
llvm-svn: 136868
 2011-08-04 13:05:26 +00:00
Jason W Kim e4df09f7ba Fix http://llvm.org/bugs/show_bug.cgi?id=10568 
Move the reloc size assert into AsmBackend - where it is more apropos.

llvm-svn: 136855
 2011-08-04 00:38:45 +00:00
Roman Divacky 11a044634a Comment out the PPC relocation offset adjustment. It must be done differently. 
This unbreaks some tests.

llvm-svn: 136692
 2011-08-02 16:15:32 +00:00
Roman Divacky 038c1a1a73 Sketch out PowerPC ELF writer. This is enough to get clang -integrated-as 
to compile a working hello world on FreeBSD/PPC32.

llvm-svn: 136689
 2011-08-02 15:51:38 +00:00
Evan Cheng 5928e69d20 Rename TargetAsmBackend to MCAsmBackend; rename createAsmBackend to createMCAsmBackend. 
llvm-svn: 136010
 2011-07-25 23:24:55 +00:00
Evan Cheng 7e763d86ba Refactor X86 target to separate MC code from Target code. 
llvm-svn: 135930
 2011-07-25 18:43:53 +00:00
Evan Cheng f2596bc62a Move TargetAsmParser.h TargetAsmBackend.h and TargetAsmLexer.h to MC where they belong. 
llvm-svn: 135833
 2011-07-23 00:45:41 +00:00
Evan Cheng ad5f485957 Sink ARM mc routines into MCTargetDesc. 
llvm-svn: 135825
 2011-07-23 00:00:19 +00:00
Jason W Kim 7fbe7914af Remove an uneeded switch - Turns out reloc results are identical w/o the switch. (face+palm) 
llvm-svn: 132790
 2011-06-09 19:13:45 +00:00
Rafael Espindola 940a0ee5ca Produce an undefined reference to _GLOBAL_OFFSET_TABLE_ if we have a 
VK_GOTOFF reloc. This matches as' behavior, but it is not clear why the linker
might need this, so I added a FIXME.

I could test this by duplicating test/MC/ELF/got.s, but it doesn't look
worthwhile.

llvm-svn: 132655
 2011-06-05 01:20:06 +00:00
Nick Lewycky 34fa1684e7 Add support for @GOTPTOFF in i386 mode. 
llvm-svn: 132643
 2011-06-04 17:38:07 +00:00
Rafael Espindola 1866808384 fixes target address tBL and tBLX and sets relocation type 
of tBL/tBLX to R_ARM_THM_CALL (ARM ELF 4.7.1.6)

Patch by koan-sin tan.

llvm-svn: 131748
 2011-05-20 20:01:01 +00:00
Jason W Kim 94c31fdd31 Add a FIXME reminder to remove ForceARMElfPIC switch. 
llvm-svn: 131411
 2011-05-16 16:35:21 +00:00
Rafael Espindola e90c1cb221 sets bit 0 of the function address of thumb function in .symtab 
("T is 1 if the target symbol S has type STT_FUNC and the
symbol addresses a Thumb instruction ;it is 0 otherwise."
from "ELF for the ARM Architecture" 4.7.1.2)

Patch by Koan-Sin Tan!

llvm-svn: 131406
 2011-05-16 16:17:21 +00:00
Matt Beaumont-Gay 7c6c90b35d Remove an unused variable and move a couple others inside DEBUG. 
llvm-svn: 131208
 2011-05-11 23:34:51 +00:00