Commit Graph

90 Commits

Author SHA1 Message Date
Sean Silva
97d37e8181 [yaml2obj] Add support for sh_addralign via AddressAlign key.
For consistency, change the address in the test case from 0xDEADBEEF to
0xCAFEBABE since 0xCAFEBABE that actually has a 2-byte alignment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183962 91177308-0d34-0410-b5e6-96231b3b80d8
2013-06-14 00:38:02 +00:00
Sean Silva
2a7e79a30f [yaml2obj] Add support for specifying raw section content.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183955 91177308-0d34-0410-b5e6-96231b3b80d8
2013-06-13 22:20:01 +00:00
Sean Silva
45b812d1a7 [yaml2obj] Add sh_addr via Address key.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183954 91177308-0d34-0410-b5e6-96231b3b80d8
2013-06-13 22:19:54 +00:00
Sean Silva
274264ce2b [yaml2obj] Initial ELF section support.
The current functionality is extremely basic and a bit rough around the
edges, but it will flesh out in future commits.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183953 91177308-0d34-0410-b5e6-96231b3b80d8
2013-06-13 22:19:48 +00:00
Sean Silva
0d3b9ac634 [yaml2obj] Remove fragile test case.
This test case was a "sanity check"/"breathing" test case at first, but
is really fragile, which impairs changes to yaml2obj.

`test/Object/yaml2obj-elf-bits-endian.test` is much more robust and
serves as an adequate sanity check.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183811 91177308-0d34-0410-b5e6-96231b3b80d8
2013-06-12 00:01:26 +00:00
Sean Silva
457c8ebfd0 Fix dubious type name similar to member name.
Should bring bots back to life.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183715 91177308-0d34-0410-b5e6-96231b3b80d8
2013-06-11 00:13:52 +00:00
Sean Silva
5918b7a03d [yaml2obj] Initial ELF support.
Currently, only emitting the ELF header is supported (no sections or
segments).

The ELFYAML code organization is broadly similar to the COFFYAML code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183711 91177308-0d34-0410-b5e6-96231b3b80d8
2013-06-10 23:44:15 +00:00
Kevin Enderby
285bd8e6f9 Move the test for the data in code into the ARM directory as it is an ARM
binary that is used for the test.  Caught by Jim Grosbach!

rdar://11791371


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183442 91177308-0d34-0410-b5e6-96231b3b80d8
2013-06-06 20:28:28 +00:00
Kevin Enderby
54154f3bf1 Teach llvm-objdump with the -macho parser how to use the data in code table
from the LC_DATA_IN_CODE load command.  And when disassembling print
the data in code formatted for the kind of data it and not disassemble those
bytes.

I added the format specific functionality to the derived class MachOObjectFile
since these tables only appears in Mach-O object files. This is my first
attempt to modify the libObject stuff so if folks have better suggestions
how to fit this in or suggestions on the implementation please let me know.

rdar://11791371


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183424 91177308-0d34-0410-b5e6-96231b3b80d8
2013-06-06 17:20:50 +00:00
Rafael Espindola
e3a0e7f29d Print symbol names in relocations when dumping COFF as YAML.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183403 91177308-0d34-0410-b5e6-96231b3b80d8
2013-06-06 13:06:17 +00:00
Rafael Espindola
23a22cdedd Don't print default values for NumberOfAuxSymbols and AuxiliaryData.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183293 91177308-0d34-0410-b5e6-96231b3b80d8
2013-06-05 03:20:13 +00:00
Rafael Espindola
6c1202c459 Handle relocations that don't point to symbols.
In ELF (as in MachO), not all relocations point to symbols. Represent this
properly by using a symbol_iterator instead of a SymbolRef. Update llvm-readobj
ELF's dumper to handle relocatios without symbols.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183284 91177308-0d34-0410-b5e6-96231b3b80d8
2013-06-05 01:33:53 +00:00
Rui Ueyama
891c0cd3c1 [Object/COFF] Fix Windows .lib name handling.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183091 91177308-0d34-0410-b5e6-96231b3b80d8
2013-06-03 00:27:03 +00:00
Rafael Espindola
7486d92a6c Change how we iterate over relocations on ELF.
For COFF and MachO, sections semantically have relocations that apply to them.
That is not the case on ELF.

In relocatable objects (.o), a section with relocations in ELF has offsets to
another section where the relocations should be applied.

In dynamic objects and executables, relocations don't have an offset, they have
a virtual address. The section sh_info may or may not point to another section,
but that is not actually used for resolving the relocations.

This patch exposes that in the ObjectFile API. It has the following advantages:

* Most (all?) clients can handle this more efficiently. They will normally walk
all relocations, so doing an effort to iterate in a particular order doesn't
save time.

* llvm-readobj now prints relocations in the same way the native readelf does.

* probably most important, relocations that don't point to any section are now
visible. This is the case of relocations in the rela.dyn section. See the
updated relocation-executable.test for example.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182908 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-30 03:05:14 +00:00
Ahmed Bougacha
2c94d0faa0 Add MCSymbolizer for symbolic/annotated disassembly.
This is a basic first step towards symbolization of disassembled
instructions. This used to be done using externally provided (C API)
callbacks. This patch introduces:
- the MCSymbolizer class, that mimics the same functions that were used
  in the X86 and ARM disassemblers to symbolize immediate operands and
  to annotate loads based off PC (for things like c string literals).
- the MCExternalSymbolizer class, which implements the old C API.
- the MCRelocationInfo class, which provides a way for targets to
  translate relocations (either object::RelocationRef, or disassembler
  C API VariantKinds) to MCExprs.
- the MCObjectSymbolizer class, which does symbolization using what it
  finds in an object::ObjectFile. This makes simple symbolization (with
  no fancy relocation stuff) work for all object formats!
- x86-64 Mach-O and ELF MCRelocationInfos.
- A basic ARM Mach-O MCRelocationInfo, that provides just enough to
  support the C API VariantKinds.

Most of what works in otool (the only user of the old symbolization API
that I know of) for x86-64 symbolic disassembly (-tvV) works, namely:
- symbol references: call _foo; jmp 15 <_foo+50>
- relocations:       call _foo-_bar; call _foo-4
- __cf?string:       leaq 193(%rip), %rax ## literal pool for "hello"
Stub support is the main missing part (because libObject doesn't know,
among other things, about mach-o indirect symbols).

As for the MCSymbolizer API, instead of relying on the disassemblers
to call the tryAdding* methods, maybe this could be done automagically
using InstrInfo? For instance, even though PC-relative LEAs are used
to get the address of string literals in a typical Mach-O file, a MOV
would be used in an ELF file. And right now, the explicit symbolization
only recognizes PC-relative LEAs. InstrInfo should have already have
most of what is needed to know what to symbolize, so this can
definitely be improved.

I'd also like to remove object::RelocationRef::getValueString (it seems
only used by relocation printing in objdump), as simply printing the
created MCExpr is definitely enough (and cleaner than string concats).



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182625 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-24 00:39:57 +00:00
Rafael Espindola
e67c9c341f Use std::list so that we have a stable iterator.
I will try to avoid creating these std::strings, but for now this gets
the tests passing with libc++.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182405 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-21 18:53:50 +00:00
Bob Wilson
ff9a6b44e0 Temporarily disable this test because it is failing when using libc++.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182212 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-19 14:59:08 +00:00
Rafael Espindola
2bbe378147 Convert obj2yaml to use yamlio.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182169 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-17 22:58:42 +00:00
Ahmed Bougacha
ebb9f17240 Object: Fix Mach-O relocation printing.
There were two problems that made llvm-objdump -r crash:
- for non-scattered relocations, the symbol/section index is actually in the
  (aptly named) symbolnum field.
- sections are 1-indexed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181843 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-14 22:41:29 +00:00
Rafael Espindola
167957fa09 Change getRelocationAdditionalInfo to be ELF only.
It was only implemented for ELF where it collected the Addend, so this
patch also renames it to getRelocationAddend.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181502 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-09 03:39:05 +00:00
Rafael Espindola
7098ae2fee Split Alignment out of the Section Characteristics.
The alignment is just a byte in the middle of Characteristics, not an
independent flag. Making it an independent field in the yaml
representation makes it more yamlio friendly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181243 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-06 20:11:21 +00:00
Amara Emerson
1aef163a68 Revert r181009.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181079 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-03 23:57:17 +00:00
Amara Emerson
3170ad7dd4 Delete test instead.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181066 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-03 22:39:03 +00:00
Amara Emerson
224e114e71 Temporarily disable failing test.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181062 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-03 22:27:48 +00:00
Amara Emerson
5d446e61d9 Add support for reading ARM ELF build attributes.
Build attribute sections can now be read if they exist via ELFObjectFile, and
the llvm-readobj tool has been extended with an option to dump this information
if requested. Regression tests are also included which exercise these features.

Also update the docs with a fixed ARM ABI link and a new link to the Addenda
which provides the build attributes specification.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181009 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-03 11:36:35 +00:00
Rafael Espindola
140536b936 Add missing ':'.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180616 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-26 17:54:46 +00:00
Rafael Espindola
956ca7265c Clarify getRelocationAddress x getRelocationOffset a bit.
getRelocationAddress is for dynamic libraries and executables,
getRelocationOffset for relocatable objects.

Mark the getRelocationAddress of COFF and MachO as not implemented yet. Add a
test of ELF's. llvm-readobj -r now prints the same values as readelf -r.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180259 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-25 12:28:45 +00:00
Rafael Espindola
a0840c4b82 Fix typo.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180137 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-23 19:39:34 +00:00
Rafael Espindola
120cf5743b Write relocations in yaml2obj.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180115 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-23 15:53:02 +00:00
Eric Christopher
4f40fa324c Add .ll as a valid test suffix for Object, this allows .ll -> object
and then dumping as tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180010 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-22 10:45:06 +00:00
Rafael Espindola
baecbb82d8 Only run the tests in test/Object/ARM if we have ARM support.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179850 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-19 12:47:53 +00:00
Rafael Espindola
db5f927020 Don't read one command past the end.
Thanks to Evgeniy Stepanov for reporting this.

It might be a good idea to add a command iterator abstraction to MachO.h, but
this fixes the bug for now.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179848 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-19 11:36:47 +00:00
Alexey Samsonov
0eaa6f675c llvm-objdump: Don't print contents of BSS sections: it makes no sense and crashes llvm-objdump on relocated objects with large bss
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179589 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-16 10:53:11 +00:00
Rafael Espindola
aa2163668d Add a test for obj2yaml in preparation for refactoring it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178829 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-05 02:02:05 +00:00
Rafael Espindola
5152e4fb06 Add back parsing of header charactestics.
It had been dropped during the switch to yaml::IO. Also add a test going
from yaml2obj to llvm-readobj. It can be extended as we add more
fields/formats to yaml2obj.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178786 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-04 20:30:52 +00:00
Rafael Espindola
d787a41b11 Implement the "mips endian" for r_info.
Normally r_info is just a 32 of 64 bit number matching the endian of the rest
of the file. Unfortunately, mips 64 bit little endian is special: The top 32
bits are a little endian number and the following 32 are a big endian one.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178694 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-03 21:02:51 +00:00
Eric Christopher
76e70f340c 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!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178679 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-03 18:31:38 +00:00
Eric Christopher
19d7322170 Implement sectionContainsSymbol for ELF.
Patch by Nico Rieck!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178677 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-03 18:31:19 +00:00
Eric Christopher
eac49f668a When dumping clear the arm/thumb flag for now.
Patch by Nico Rieck!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178676 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-03 18:31:12 +00:00
Shankar Easwaran
bd1737c846 [tools][llvm-readobj] print the name of the section when iterating the symbol table / dynamic symbol table
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177873 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-25 16:06:51 +00:00
Michael J. Spencer
d326d05fb9 [llvm-readobj] Add ELF .dynamic table dumping.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175592 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-20 02:37:12 +00:00
Michael J. Spencer
def0c1f756 [Object][ELF] Fix crash on no dynamic section.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174639 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-07 18:26:45 +00:00
Michael J. Spencer
27b2b1b4e5 [llvm-objdump] Emit addresses with the correct number of leading 0's.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172130 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-10 22:40:50 +00:00
Michael J. Spencer
95abfbe8e9 [Object][ELF] Fix incorrect size of members for the 64 version of Elf_Phdr_Impl.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171650 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-06 03:57:11 +00:00
Michael J. Spencer
b2c064c695 [objdump] Add --private-headers, -p.
This currently prints the ELF program headers.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171649 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-06 03:56:49 +00:00
Michael J. Spencer
4d9c5397b4 [Object][ELF] Add a maximum alignment. This is used by createELFObjectFile to create a properly aligned reader.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171520 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04 20:36:28 +00:00
Michael J. Spencer
3fea4ef0b4 [Object] Temporarily disable these tests.
They are failing because archives create unaligned ELF files. The recent
Endian change added a __builtin_unreachable() when this happens. I will be
committing a fix for this soon.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171438 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-03 01:24:32 +00:00
Rafael Espindola
5b712efd9a Fix bits check in ELFObjectFile::isSectionZeroInit().
Fixes PR14723.

Patch by Sami Liedes!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171309 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-31 18:20:51 +00:00
Rafael Espindola
fc73847d8f Dump sections. Extracted from a patch by Sami Liedes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171304 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-31 16:29:44 +00:00
Rafael Espindola
148ee4f224 Print a header above the symbols. Extracted from a patch by Sami Liedes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171302 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-31 16:05:21 +00:00