Commit Graph

220 Commits

Author SHA1 Message Date
Peter Collingbourne 2f495b93ee Add support for subsections to the ELF assembler. Fixes PR8717.
Differential Revision: http://llvm-reviews.chandlerc.com/D598

llvm-svn: 179725
2013-04-17 21:18:16 +00:00
Nico Rieck ba848e3bca Replace coff-/elf-dump with llvm-readobj
llvm-svn: 179361
2013-04-12 04:06:46 +00:00
Peter Collingbourne adac407ed9 Use a scheme closer to that of GNU as when deciding the type of a
symbol with multiple .type declarations.

Differential Revision: http://llvm-reviews.chandlerc.com/D607

llvm-svn: 179184
2013-04-10 16:52:15 +00:00
Eric Christopher 9cad53cfec Implements low-level object file format specific output for COFF and
ELF with support for:

- File headers
- Section headers + data
- Relocations
- Symbols
- Unwind data (only COFF/Win64)

The output format follows a few rules:
- Values are almost always output one per line (as elf-dump/coff-dump already do). - Many values are translated to something readable (like enum names), with the raw value in parentheses.
- Hex numbers are output in uppercase, prefixed with "0x".
- Flags are sorted alphabetically.
- Lists and groups are always delimited.

Example output:
---------- snip ----------
Sections [
  Section {
    Index: 1
    Name: .text (5)
    Type: SHT_PROGBITS (0x1)
    Flags [ (0x6)
      SHF_ALLOC (0x2)
      SHF_EXECINSTR (0x4)
    ]
    Address: 0x0
    Offset: 0x40
    Size: 33
    Link: 0
    Info: 0
    AddressAlignment: 16
    EntrySize: 0
    Relocations [
      0x6 R_386_32 .rodata.str1.1 0x0
      0xB R_386_PC32 puts 0x0
      0x12 R_386_32 .rodata.str1.1 0x0
      0x17 R_386_PC32 puts 0x0
    ]
    SectionData (
      0000: 83EC04C7 04240000 0000E8FC FFFFFFC7  |.....$..........|
      0010: 04240600 0000E8FC FFFFFF31 C083C404  |.$.........1....|
      0020: C3                                   |.|
    )
  }
]
---------- snip ----------

Relocations and symbols can be output standalone or together with the section header as displayed in the example.
This feature set supports all tests in test/MC/COFF and test/MC/ELF (and I suspect all additional tests using elf-dump), making elf-dump and coff-dump deprecated.

Patch by Nico Rieck!

llvm-svn: 178679
2013-04-03 18:31:38 +00:00
Rafael Espindola ddbf4f47dc Move test since it depends on the X86 backend.
llvm-svn: 178249
2013-03-28 17:01:28 +00:00
Michael Gottesman f23bb4e558 Revert "Updated ELF relocation test for .eh_frame section"
This reverts commit c8d65364223a04b179958a50a4bf0f89b21dd7d2.

This broke a bunch of the buildbots.

llvm-svn: 178222
2013-03-28 05:14:26 +00:00
Jack Carter ccc266559f Updated ELF relocation test for .eh_frame section
Made sure we were looking a correct section
Added Mips32/64 as an extra check
Updated llvm-objdump to generate symbolic info for Mips relocations

llvm-svn: 178190
2013-03-27 22:58:49 +00:00
Rafael Espindola ef9d3494b2 Fix the FDE encoding to be relative on ELF.
This is a very late complement to r130637 which fixed this on x86_64. Fixes
pr15448.

Since it looks like that every elf architecture uses this encoding when using
cfi, make it the default for elf. Just exclude mips64el. It has a lovely
.ll -> .o test (ef_frame.ll) that tests that nothing changes in the binary
content of the .eh_frame produced by llc. Oblige it.

llvm-svn: 177141
2013-03-15 05:51:57 +00:00
Nick Lewycky c1f9694d05 We need a shndx if the number of sections breaks SHN_LORESERVE. This condition
for choosing to emit a shndx was simply testing the wrong variable.

llvm-svn: 176762
2013-03-09 09:31:44 +00:00
Eli Bendersky 10ab5e72e1 Rewrite a test to check actual output rather than intermediate implementation
detail.

The was this test was written, it was relying on an implementation detail
(fixups) and hence was very brittle (relying, among other things, on the
exact ordering of statistics printed by MC).

The test was rewritten to check a more observable output difference. While it
doesn't cover 100% of the things the original test covered, it's a good
practice to write regression tests this way. If we want to check that
internal details and invariants hold, such tests should be expressed as unit
tests.

llvm-svn: 176377
2013-03-01 20:54:00 +00:00
Eli Bendersky e6abe83258 Now that llvm-dwarfdump supports flags to specify which DWARF section to dump,
use them in tests that run llvm-dwarfdump. This is in order to make tests as
specific as possible.

llvm-svn: 173498
2013-01-25 21:44:53 +00:00
NAKAMURA Takumi ad0c80b8e6 llvm/test/MC/ELF/comp-dir.s: Appease MSYS Bash.
llvm-svn: 170410
2012-12-18 05:08:12 +00:00
Chandler Carruth d75be9b4fb Add a triple to this test -- it has to be an ELF platform...
llvm-svn: 170374
2012-12-17 21:44:50 +00:00
Chandler Carruth 10700aad85 Prepare LLVM to fix PR14625, exposing a hook in MCContext to manage the
compilation directory.

This defaults to the current working directory, just as it always has,
but now an assembler can choose to override it with a custom directory.
I've taught llvm-mc about this option and added a test case.

llvm-svn: 170371
2012-12-17 21:32:42 +00:00
Eli Bendersky 7352e4ffcb Add a test for explicitly exercising the mc-relax-all flag.
llvm-svn: 169764
2012-12-10 20:36:01 +00:00
Eli Bendersky 2ccd044c22 Add separate statistics for Data and Inst fragments emitted during relaxation.
Also fixes a test that was overly-sensitive to the exact order of statistics
emitted.

llvm-svn: 169619
2012-12-07 17:59:21 +00:00
Rafael Espindola cdb9a538d6 Add support for .cfi_register now that it is easy to extent the representation
to support it. Original patch with the parsing and plumbing by the PaX team and
Roman Divacky. I added the bits in MCDwarf.cpp and the test.

llvm-svn: 168565
2012-11-25 15:14:49 +00:00
Rafael Espindola 9bb247813a Implement .cfi_undefined. Based on a patch from PaX team, updated by
Roman Divacky. I just added the testcase.

llvm-svn: 168520
2012-11-23 16:59:41 +00:00
Alexey Samsonov 00fd5257a2 Emit relocations from .debug_aranges to .debug_info for asm files
llvm-svn: 167926
2012-11-14 09:55:38 +00:00
Benjamin Kramer 47f9ec92cb MC: Overhaul handling of .lcomm
- Darwin lied about not supporting .lcomm and turned it into zerofill in the
  asm parser. Push the zerofill-conversion down into macho-specific code.
- This makes the tri-state LCOMMType enum superfluous, there are no targets
  without .lcomm.
- Do proper error reporting when trying to use .lcomm with alignment on a target
  that doesn't support it.
- .comm and .lcomm alignment was parsed in bytes on COFF, should be power of 2.
- Fixes PR13755 (.lcomm crashes on ELF).

llvm-svn: 163395
2012-09-07 17:25:13 +00:00
Benjamin Kramer e3d658bb6c PR13754: llvm-mc/x86 crashes on .cfi directives without the % prefix for registers.
gas accepts this and it seems to be common enough to be worth supporting. This
doesn't affect the parsing of reg operands outside of .cfi directives.

llvm-svn: 163390
2012-09-07 14:51:35 +00:00
Nick Lewycky 1dcfe449ef Give this test an explicit triple.
llvm-svn: 161740
2012-08-12 08:21:27 +00:00
Nick Lewycky 333449cd65 When emitting the PC range in an FDE, use the same data encoding for both ends
of the range. Fixes PR13581!

llvm-svn: 161739
2012-08-12 08:09:45 +00:00
Benjamin Kramer 6bee7f750d ELF: Add support for the asm .version directive.
llvm-svn: 156712
2012-05-12 14:30:47 +00:00
Eli Bendersky f33086052d Continue cleanup of LIT, getting rid of the remaining artifacts from dejagnu
* Removed test/lib/llvm.exp - it is no longer needed 
* Deleted the dg.exp reading code from test/lit.cfg. There are no dg.exp files
  left in the test suite so this code is no longer required. test/lit.cfg is
  now much shorter and clearer 
* Removed a lot of duplicate code in lit.local.cfg files that need access to
  the root configuration, by adding a "root" attribute to the TestingConfig
  object. This attribute is dynamically computed to provide the same
  information as was previously provided by the custom getRoot functions. 
* Documented the config.root attribute in docs/CommandGuide/lit.pod

llvm-svn: 153408
2012-03-25 09:02:19 +00:00
David Meyer 1df4b84db4 In the ObjectFile interface, replace isInternal(), isAbsolute(), isGlobal(), and isWeak(), with a bitset of flags.
llvm-svn: 151670
2012-02-28 23:47:53 +00:00
Rafael Espindola c22c85c29c On ELF, create relocations to the abbreviation and line sections when producing
debug info for assembly files. We were already doing the right thing when
producing debug info for C/C++.

ELF linkers don't know dwarf, so they depend on these relocations to produce
valid dwarf output.

llvm-svn: 151655
2012-02-28 21:13:05 +00:00
Eli Bendersky 924f9a671d Replace all instances of dg.exp file with lit.local.cfg, since all tests are run with LIT now and now Dejagnu. dg.exp is no longer needed.
Patch reviewed by Daniel Dunbar. It will be followed by additional cleanup patches.

llvm-svn: 150664
2012-02-16 06:28:33 +00:00
David Meyer 44ec69efe0 For ELF, also call fixSymbolsInTLSFixups() on expressions passed to EmitValue (literal values). Previously only called on expressions in instructions. New test cases added to tls.s, tls-i386.s. Resolves PR11981.
llvm-svn: 150582
2012-02-15 15:09:06 +00:00
Rafael Espindola 3c47e37387 Add support for .cfi_signal_frame. Fixes pr11762.
llvm-svn: 148733
2012-01-23 21:51:52 +00:00
Rafael Espindola 4ea99816ef Implement cfi_restore. Patch by Brian Anderson!
llvm-svn: 147356
2011-12-29 21:43:03 +00:00
Rafael Espindola ef4aa35164 Implement .cfi_escape. Patch by Brian Anderson!
llvm-svn: 147352
2011-12-29 20:24:47 +00:00
Roman Divacky 735cb8bcdc Add support for gnu_indirect_function.
llvm-svn: 146377
2011-12-12 17:34:04 +00:00
Rafael Espindola c7f355b8e1 Handle expressions of the form _GLOBAL_OFFSET_TABLE_-symbol the same way gas
does. The _GLOBAL_OFFSET_TABLE_ is still magical in that we get a R_386_GOTPC,
but it doesn't change the immediate in the same way as when the expression
has no right hand side symbol.

llvm-svn: 146311
2011-12-10 02:28:43 +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
Nick Lewycky 3e01bd3b60 Apparently, sometimes llvm-nm doesn't put the undefined symbol at the top. Take
that into account and test for no U's showing up in the middle, which is what
we really wanted to test for.

llvm-svn: 141653
2011-10-11 06:58:11 +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
Rafael Espindola 77dde89b90 Fix the bitwidth of the remaining fields.
llvm-svn: 136884
2011-08-04 17:00:11 +00:00
Rafael Espindola 9bc32a96be print st_shndx with the correct number of bits.
llvm-svn: 136880
2011-08-04 15:50:13 +00:00
Rafael Espindola 9528995e3f print st_other with the correct number of bits.
llvm-svn: 136877
2011-08-04 15:38:19 +00:00
Rafael Espindola 96df560ce1 print st_type with the correct number of bits.
llvm-svn: 136875
2011-08-04 15:24:00 +00:00
Rafael Espindola 79ef75dc49 Print st_bind with the correct number of bits.
llvm-svn: 136874
2011-08-04 15:10:35 +00:00
Rafael Espindola 1848231ad1 Print r_sym with the correct number of bits.
llvm-svn: 136873
2011-08-04 14:48:27 +00:00
Rafael Espindola 260af5cef6 Print r_type with the correct number of bits.
llvm-svn: 136872
2011-08-04 14:39:30 +00:00
Rafael Espindola 1b282e7e49 Another counter goes decimal.
llvm-svn: 136871
2011-08-04 14:27:46 +00:00
Rafael Espindola 65c559c5fb Change anther counter to decimal.
llvm-svn: 136870
2011-08-04 14:01:03 +00:00
Rafael Espindola cad9e7f094 Don't print a counter in hex.
llvm-svn: 136869
2011-08-04 13:39:15 +00:00
Rafael Espindola 69c67d3b18 Print all the bits in the addend.
llvm-svn: 136867
2011-08-04 13:00:24 +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