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Commit Graph

467 Commits

Author SHA1 Message Date
Kevin Enderby
c8fe95519b Adds the next bit of support for llvm-objdump’s -private-headers for executable Mach-O files.
This adds the printing of more load commands, so that the normal load commands
in a typical X86 Mach-O executable can all be printed.

llvm-svn: 217172
2014-09-04 16:54:47 +00:00
David Blaikie
9ec4b63537 unique_ptrify IRObjectFile::createIRObjectFile
I took a guess at the changes to the gold plugin, because that doesn't
seem to build by default for me. Not sure what dependencies I might be
missing for that.

llvm-svn: 217056
2014-09-03 17:59:23 +00:00
David Blaikie
a84a0ee1dc unique_ptrify MachOUniversalBinary::create
llvm-svn: 217052
2014-09-03 17:41:05 +00:00
Nick Kledzik
f66cb18d0c Object/llvm-objdump: allow dumping of mach-o exports trie
MachOObjectFile in lib/Object currently has no support for parsing the rebase, 
binding, and export information from the LC_DYLD_INFO load command in final 
linked mach-o images. This patch adds support for parsing the exports trie data
structure. It also adds an option to llvm-objdump to dump that export info.

I did the exports parsing first because it is the hardest. The information is 
encoded in a trie structure, but the standard ObjectFile way to inspect content 
is through iterators. So I needed to make an iterator that would do a 
non-recursive walk through the trie and maintain the concatenation of edges 
needed for the current string prefix.

I plan to add similar support in MachOObjectFile and llvm-objdump to 
parse/display the rebasing and binding info too.

llvm-svn: 216808
2014-08-30 00:20:14 +00:00
Craig Topper
43cee2f5fc Simplify creation of a bunch of ArrayRefs by using None, makeArrayRef or just letting them be implicitly created.
llvm-svn: 216525
2014-08-27 05:25:25 +00:00
Rafael Espindola
851ae8ba7d fix the gcc build
llvm-svn: 216018
2014-08-19 20:06:25 +00:00
Rafael Espindola
0f7753400d Fix the MSVC build.
llvm-svn: 216014
2014-08-19 19:45:15 +00:00
Rafael Espindola
08aa78de63 Don't own the buffer in object::Binary.
Owning the buffer is somewhat inflexible. Some Binaries have sub Binaries
(like Archive) and we had to create dummy buffers just to handle that. It is
also a bad fit for IRObjectFile where the Module wants to own the buffer too.

Keeping this ownership would make supporting IR inside native objects
particularly painful.

This patch focuses in lib/Object. If something elsewhere used to own an Binary,
now it also owns a MemoryBuffer.

This patch introduces a few new types.

* MemoryBufferRef. This is just a pair of StringRefs for the data and name.
  This is to MemoryBuffer as StringRef is to std::string.
* OwningBinary. A combination of Binary and a MemoryBuffer. This is needed
  for convenience functions that take a filename and return both the
  buffer and the Binary using that buffer.

The C api now uses OwningBinary to avoid any change in semantics. I will start
a new thread to see if we want to change it and how.

llvm-svn: 216002
2014-08-19 18:44:46 +00:00
Kevin Enderby
a1dd557f72 Make llvm-objdump handle both arm and thumb disassembly from the same Mach-O
file with -macho, the Mach-O specific object file parser option.

After some discussion I chose to do this implementation contained in the logic
of llvm-objdump’s MachODump.cpp using a second disassembler for thumb when
needed and with updates mostly contained in the MachOObjectFile class.

llvm-svn: 215931
2014-08-18 20:21:02 +00:00
Rafael Espindola
cb64eee66e llvm-objdump: don't print relocations in non-relocatable files.
This matches the behavior of GNU objdump.

llvm-svn: 215844
2014-08-17 19:09:37 +00:00
Rafael Espindola
6acfd7d2c4 Remove a redundant "public:". NFC.
llvm-svn: 215842
2014-08-17 18:33:17 +00:00
Rafael Espindola
b81f06cd2c Add a non-templated ELFObjectFileBase class.
Use it to implement some ELF only virtual interfaces instead of using error
prone series of dyn_casts.

llvm-svn: 215838
2014-08-17 17:52:10 +00:00
Benjamin Kramer
da144ed5a2 Canonicalize header guards into a common format.
Add header guards to files that were missing guards. Remove #endif comments
as they don't seem common in LLVM (we can easily add them back if we decide
they're useful)

Changes made by clang-tidy with minor tweaks.

llvm-svn: 215558
2014-08-13 16:26:38 +00:00
Rafael Espindola
f941735080 Delete dead code. NFC.
llvm-svn: 215224
2014-08-08 16:49:35 +00:00
Rafael Espindola
4d002fe555 getLoadName is only implemented for ELF, make it ELF only.
llvm-svn: 215219
2014-08-08 16:39:22 +00:00
Rafael Espindola
ca3df92c52 Use a simpler predicate. NFC.
llvm-svn: 215218
2014-08-08 16:30:17 +00:00
Rafael Espindola
c2dc7844eb A std::unique_ptr case I missed in the previous patch.
llvm-svn: 214379
2014-07-31 03:36:00 +00:00
Rafael Espindola
191faa331e Use std::unique_ptr to make the ownership explicit.
llvm-svn: 214377
2014-07-31 03:12:45 +00:00
David Blaikie
ef32100342 Correct the ownership passing semantics of object::createBinary and make them explicit in the type system.
createBinary documented that it destroyed the parameter in error cases,
though by observation it does not. By passing the unique_ptr by value
rather than lvalue reference, callers are now explicit about passing
ownership and the function implements the documented contract. Remove
the explicit documentation, since now the behavior cannot be anything
other than what was documented, so it's redundant.

Also drops a unique_ptr::release in llvm-nm that was always run on a
null unique_ptr anyway.

llvm-svn: 213557
2014-07-21 16:26:24 +00:00
Ulrich Weigand
e2acdc71d2 [PowerPC] ELFv2 dynamic loader support
This patch enables the new ELFv2 ABI in the runtime dynamic loader.
The loader has to implement the following features:
- In the ELFv2 ABI, do not look up a function descriptor in .opd, but
  instead use the local entry point when resolving a direct call.
- Update the TOC restore code to use the new TOC slot linkage area
  offset.
- Create PLT stubs appropriate for the ELFv2 ABI.

Note that this patch also adds common-code changes. These are necessary
because the loader must check the newly added ELF flags: the e_flags
header bits encoding the ABI version, and the st_other symbol table
entry bits encoding the local entry point offset.  There is currently
no way to access these, so I've added ObjectFile::getPlatformFlags and
SymbolRef::getOther accessors.

Reviewed by Hal Finkel.

llvm-svn: 213491
2014-07-20 23:53:14 +00:00
Lang Hames
086ae4eed0 [RuntimeDyld] Revert r211652 - MachO object GDB registration support.
The registration scheme used in r211652 violated the read-only contract of
MemoryBuffer. This caused crashes in llvm-rtdyld where macho objects were backed
by read-only mmap'd memory.

llvm-svn: 213086
2014-07-15 19:35:22 +00:00
Alp Toker
223ff032c6 Fix the MSVC build following r212382
Looks like the casts are needed there after all.

llvm-svn: 212399
2014-07-06 10:54:41 +00:00
Alp Toker
6874e36edb Don't use StringRef iterator functions for data access
And also remove some redundant casts from r212371.

llvm-svn: 212397
2014-07-06 10:32:55 +00:00
Rafael Espindola
83d6e2138c This only needs a StringRef. No functionality change.
llvm-svn: 212371
2014-07-05 11:38:52 +00:00
Rafael Espindola
622273765e Make RecordStreamer.h private.
llvm-svn: 212361
2014-07-04 22:44:18 +00:00
Rafael Espindola
d0cd4f5275 Implement LTOModule on top of IRObjectFile.
IRObjectFile provides all the logic for producing mangled names and getting
symbols from inline assembly.

LTOModule then adds logic for linking specific tasks, like constructing
llvm.compiler_user or extracting linker options from the bitcode.

The rule of the thumb is that IRObjectFile has the functionality that is
needed by both LTO and llvm-ar.

llvm-svn: 212349
2014-07-04 18:40:36 +00:00
Rafael Espindola
228a05428e Move createIRObjectFile to the IRObjectFile class and return the concrete type.
llvm-svn: 212301
2014-07-03 23:03:50 +00:00
Rafael Espindola
832799f1df Add support for inline asm symbols to IRObjectFile.
This also enables it in llvm-nm so that it can be tested.

llvm-svn: 212282
2014-07-03 18:59:23 +00:00
Rafael Espindola
90be969cdb Invert the MC -> Object dependency.
Now that we have a lib/MC/MCAnalysis, the dependency was there just because
of two helper classes. Move the two over to MC.

This will allow IRObjectFile to parse inline assembly.

llvm-svn: 212248
2014-07-03 02:01:39 +00:00
Kevin Enderby
37ca7e910b Add the -arch flag support to llvm-nm to select the slice out of a Mach-O
universal file.  This also includes support for -arch all, selecting the host
architecture by default from a universal file and checking if -arch is used
with a standard Mach-O it matches that architecture.

llvm-svn: 212054
2014-06-30 18:45:23 +00:00
Tim Northover
9b37e52530 macho-dump: add code to print LC_ID_DYLIB load commands.
I want to check them in lld.

llvm-svn: 212043
2014-06-30 14:40:57 +00:00
Ed Maste
2e5df25fce llvm-objdump: don't assert if ELF file has no sections
FreeBSD core files, for example, have no sections (only program headers).

llvm.org/pr20139
Differential Revision: http://reviews.llvm.org/D4323

llvm-svn: 211904
2014-06-27 16:37:20 +00:00
Simon Atanasyan
fb5fe85156 [ELF][Mips] Fix recognition of MIPS 64-bit arch in the ELFObjectFile:getArch() method.
llvm-svn: 211891
2014-06-27 11:36:45 +00:00
Lang Hames
85285a01f4 [RuntimeDyld] Adds the necessary hooks to MCJIT to be able to debug generated
MachO files using the GDB JIT debugging interface.

Patch by Keno Fischer. Thanks Keno!

llvm-svn: 211652
2014-06-25 00:20:53 +00:00
Rafael Espindola
3df1c115ec Pass a unique_ptr<MemoryBuffer> to the constructors in the Binary hierarchy.
Once the objects are constructed, they own the buffer. Passing a unique_ptr
makes that clear.

llvm-svn: 211595
2014-06-24 13:56:32 +00:00
Rafael Espindola
86b258f3cd Pass a std::unique_ptr& to the create??? methods is lib/Object.
This makes the buffer ownership on error conditions very natural. The buffer
is only moved out of the argument if an object is constructed that now
owns the buffer.

llvm-svn: 211546
2014-06-23 22:00:37 +00:00
Rafael Espindola
23e5fb2297 Make ObjectFile and BitcodeReader always own the MemoryBuffer.
This allows us to just use a std::unique_ptr to store the pointer to the buffer.
The flip side is that they have to support releasing the buffer back to the
caller.

Overall this looks like a more efficient and less brittle api.

llvm-svn: 211542
2014-06-23 21:53:12 +00:00
Rafael Espindola
e0f3ded593 Convert a few methods to use ErrorOr.
It used to be inconvenient to mix ErrorOr and UniquePtr, but with c++11
they work OK together.

llvm-svn: 211532
2014-06-23 20:41:02 +00:00
Kevin Enderby
197fe3a33d Change the output of llvm-nm and llvm-size for Mach-O universal files (aka
fat files) to print “ (for architecture XYZ)” for fat files with more than
one architecture to be like what the darwin tools do for fat files.

Also clean up the Mach-O printing of archive membernames in llvm-nm to use
the darwin form of "libx.a(foo.o)".

llvm-svn: 211316
2014-06-19 22:03:18 +00:00
Rafael Espindola
072e836a72 Add a symbols() range and use a range loop.
llvm-svn: 211222
2014-06-18 21:14:57 +00:00
Ulrich Weigand
b91f5c2da5 Support LE in RelocVisitor::visitELF_PPC64_*
Since we now support both LE and BE PPC64 variants, use of getAddend64BE
is no longer correct.  Use the generic getELFRelocationAddend instead,
as was already done for Mips.

llvm-svn: 211170
2014-06-18 15:15:49 +00:00
Rafael Espindola
910ec52f4e Convert the Archive API to use ErrorOr.
Now that we have c++11, even things like ErrorOr<std::unique_ptr<...>> are
easy to use.

No intended functionality change.

llvm-svn: 211033
2014-06-16 16:08:36 +00:00
Rafael Espindola
e0e308ff6d Don't use 'using std::error_code' in include/llvm.
This should make sure that most new uses use the std prefix.

llvm-svn: 210835
2014-06-12 21:46:39 +00:00
Rafael Espindola
38dc624425 Remove system_error.h.
This is a minimal change to remove the header. I will remove the occurrences
of "using std::error_code" in a followup patch.

llvm-svn: 210803
2014-06-12 17:38:55 +00:00
Rafael Espindola
b0ac81f225 Don't import error_category into the llvm namespace.
llvm-svn: 210733
2014-06-12 01:45:43 +00:00
Rafael Espindola
cb080681ac Use std::error_code instead of llvm::error_code.
The idea of this patch is to turn llvm/Support/system_error.h into a
transitional header that just brings in the erorr_code api to the llvm
namespace. I will remove it shortly afterwards.

The cases where the general idea needed some tweaking:

* std::errc is a namespace in msvc, so we cannot use "using std::errc". I could
add an #ifdef, but there were not that many uses, so I just added std:: to
them in this patch.

* Template specialization had to be moved to the std namespace in this
patch set already.

* The msvc implementation of default_error_condition doesn't seem to
provide the same transformations as we need. Not too surprising since
the standard doesn't actually say what "equivalent" means. I fixed the
problem by keeping our old mapping and using it at error_code
construction time.

Despite these shortcomings I think this is still a good thing. Some reasons:

* The different implementations of system_error might improve over time.
* It removes 925 lines of code from llvm already.
* It removes 6313 bytes from the text segment of the clang binary when
it is built with gcc and 2816 bytes when building with clang and
libstdc++.

llvm-svn: 210687
2014-06-11 19:05:50 +00:00
Simon Atanasyan
e4655bdc7b [yaml2obj][obj2yaml] Support ELF symbol's visibility flags (default/hidden/protected).
llvm-svn: 210316
2014-06-06 07:41:57 +00:00
Kevin Enderby
f831fe0c12 Add "-format darwin" to llvm-nm to be like darwin's nm(1) -m output.
This is a first step in seeing if it is possible to make llvm-nm produce
the same output as darwin's nm(1).  Darwin's default format is bsd but its
-m output prints the longer Mach-O specific details.  For now I added the
"-format darwin" to do this (whos name may need to change in the future).
As there are other Mach-O specific flags to nm(1) which I'm hoping to add some
how in the future.  But I wanted to see if I could get the correct output for
-m flag using llvm-nm and the libObject interfaces.

I got this working but would love to hear what others think about this approach
to getting object/format specific details printed with llvm-nm.

llvm-svn: 210285
2014-06-05 21:21:57 +00:00
Simon Atanasyan
bc05e277f9 [Object][ELF] Range-based loop simplification.
No functional changes.

llvm-svn: 210164
2014-06-04 05:51:44 +00:00
Rafael Espindola
99907878d9 Use an enum class.
llvm-svn: 210078
2014-06-03 05:26:12 +00:00