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path: root/llvm/lib/Object/ELFObjectFile.cpp
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2014-01-24Make ObjectFile ownership of the MemoryBuffer optional.Rafael Espindola1-9/+18
This allows llvm-ar to mmap the input files only once. llvm-svn: 200040
2014-01-21Be a bit more consistent about using ErrorOr when constructing Binary objects.Rafael Espindola1-15/+18
The constructors of classes deriving from Binary normally take an error_code as an argument to the constructor. My original intent was to change them to have a trivial constructor and move the initial parsing logic to a static method returning an ErrorOr. I changed my mind because: * A constructor with an error_code out parameter is extremely convenient from the implementation side. We can incrementally construct the object and give up when we find an error. * It is very efficient when constructing on the stack or when there is no error. The only inefficient case is where heap allocating and an error is found (we have to free the memory). The result is that this is a much smaller patch. It just standardizes the create* helpers to return an ErrorOr. Almost no functionality change: The only difference is that this found that we were trying to read past the end of COFF import library but ignoring the error. llvm-svn: 199770
2013-08-08[Object] Split the ELF interface into 3 parts.Michael J. Spencer1-2/+1
* ELFTypes.h contains template magic for defining types based on endianess, size, and alignment. * ELFFile.h defines the ELFFile class which provides low level ELF specific access. * ELFObjectFile.h contains ELFObjectFile which uses ELFFile to implement the ObjectFile interface. llvm-svn: 188022
2013-05-24Replace Count{Leading,Trailing}Zeros_{32,64} with count{Leading,Trailing}Zeros.Michael J. Spencer1-1/+1
llvm-svn: 182680
2013-02-03[Support] Add LLVM_IS_UNALIGNED_ACCESS_FAST.Michael J. Spencer1-4/+16
llvm-svn: 174271
2013-01-15[Object][ELF] Simplify ELFObjectFile by using ELFType.Michael J. Spencer1-8/+8
This simplifies the usage and implementation of ELFObjectFile by using ELFType to replace: <endianness target_endianness, std::size_t max_alignment, bool is64Bits> This does complicate the base ELF types as they must now use template template parameters to partially specialize for the 32 and 64bit cases. However these are only defined once. llvm-svn: 172515
2013-01-04[Object][ELF] Add a maximum alignment. This is used by createELFObjectFile ↵Michael J. Spencer1-6/+28
to create a properly aligned reader. llvm-svn: 171520
2012-04-16Implement GDB integration for source level debugging of code JITed usingPreston Gurd1-10/+0
the MCJIT execution engine. The GDB JIT debugging integration support works by registering a loaded object image with a pre-defined function that GDB will monitor if GDB is attached. GDB integration support is implemented for ELF only at this time. This integration requires GDB version 7.0 or newer. Patch by Andy Kaylor! llvm-svn: 154868
2012-02-12Expose the ELFObjectFile class directly in the Object/ELF.h header, similarlyEli Bendersky1-1695/+25
to what's done for MachO and COFF. This allows advanced uses of the class to be implemented outside the Object library. In particular, the DyldELFObject subclass is now moved into its logical home - ExecutionEngine/RuntimeDyld. This patch was reviewed by Michael Spencer. llvm-svn: 150327
2012-02-04Object: avoid undefined behavior when bounds-checkingDylan Noblesmith1-8/+22
Don't form an out of bounds pointer just to test if it would be out of bounds. Also perform the same bounds checking for all the previous mapped structures. llvm-svn: 149750
2012-01-24Sink assert-only variables into the assertsMatt Beaumont-Gay1-16/+10
llvm-svn: 148849
2012-01-23Silence warnings in -asserts buildMatt Beaumont-Gay1-0/+6
llvm-svn: 148715
2012-01-22Basic runtime dynamic loading capabilities added to ELFObjectFile, implementedEli Bendersky1-19/+239
in a subclass named DyldELFObject. This class supports rebasing the object file it represents by re-mapping section addresses to the actual memory addresses the object was placed in. This is required for MC-JIT implementation on ELF with debugging support. Patch reviewed on llvm-commits. Developed together with Ashok Thirumurthi and Andrew Kaylor. llvm-svn: 148653
2011-11-29Fixed ObjectFile functions:Danil Malyshev1-13/+36
- getSymbolOffset() renamed as getSymbolFileOffset() - getSymbolFileOffset(), getSymbolAddress(), getRelocationAddress() returns same result for ELFObjectFile, MachOObjectFile and COFFObjectFile. - added getRelocationOffset() - fixed MachOObjectFile::getSymbolSize() - fixed MachOObjectFile::getSymbolSection() - fixed MachOObjectFile::getSymbolOffset() for symbols without section data. llvm-svn: 145408
2011-11-27Revert r145180 as it is causing test failures on all the bots.Chandler Carruth1-36/+13
Original commit message: Fixed ObjectFile functions: - getSymbolOffset() renamed as getSymbolFileOffset() - getSymbolFileOffset(), getSymbolAddress(), getRelocationAddress() returns same result for ELFObjectFile, MachOObjectFile and COFFObjectFile. - added getRelocationOffset() - fixed MachOObjectFile::getSymbolSize() - fixed MachOObjectFile::getSymbolSection() - fixed MachOObjectFile::getSymbolOffset() for symbols without section data. llvm-svn: 145182
2011-11-27Fixed ObjectFile functions:Danil Malyshev1-13/+36
- getSymbolOffset() renamed as getSymbolFileOffset() - getSymbolFileOffset(), getSymbolAddress(), getRelocationAddress() returns same result for ELFObjectFile, MachOObjectFile and COFFObjectFile. - added getRelocationOffset() - fixed MachOObjectFile::getSymbolSize() - fixed MachOObjectFile::getSymbolSection() - fixed MachOObjectFile::getSymbolOffset() for symbols without section data. llvm-svn: 145180
2011-10-26Expand relocation type field to 64 bits. MachO scattered relocations ↵Owen Anderson1-2/+2
require 33 bits of type info. llvm-svn: 143032
2011-10-17Object: Add some types to SymbolRef::Type.Michael J. Spencer1-0/+6
Some of these can be true at the same time and there are a lot to add, so this should be turned into a bitfield. Some of the other accessors should probably be folded into this. llvm-svn: 142318
2011-10-17Object: Add isSymbolAbsolute and getSymbolSection.Michael J. Spencer1-0/+29
llvm-svn: 142317
2011-10-17Object: Add isSymbolWeak.Michael J. Spencer1-0/+12
llvm-svn: 142316
2011-10-17Object: Implement casting for concrete classes.Michael J. Spencer1-0/+5
llvm-svn: 142314
2011-10-17Object: Fix redundant name.Michael J. Spencer1-2/+2
llvm-svn: 142238
2011-10-13ELF: Fix the section that relocations apply to. Add test to verify. Patch by ↵Michael J. Spencer1-3/+3
Danil Malyshev! llvm-svn: 141901
2011-10-13Elf_Word is not POD! Stop using it in a DenseMap.Nick Lewycky1-7/+4
llvm-svn: 141851
2011-10-12lib/Object/ELFObjectFile.cpp: Fix undefined behavior for ↵NAKAMURA Takumi1-1/+4
MC/ELF/many-section.s not to fail (on msvc). DenseMap::lookup(k) would return "default constructor value" when k was not met. It would be useless when value type were POD. llvm-svn: 141774
2011-10-11Reapply r141605 with fixes for appropriate handling of reserved section numbersNick Lewycky1-17/+50
in st_shndx fields. llvm-svn: 141639
2011-10-11Add support for .symtab_shnidx. Unfortunately, doing this required breaking aNick Lewycky1-9/+42
layer of abstraction around SymbolRef where you can read its private SymbolPimpl member. llvm-svn: 141636
2011-10-11Revert r141605 as it broke tests for llvm-nm.Nick Lewycky1-34/+13
llvm-svn: 141614
2011-10-11Add support for reading many-section ELF files.Nick Lewycky1-13/+34
If you want to tackle adding the testcase, let me know. It's a 4.2MB ELF file and I'll be happy to mail it to you. llvm-svn: 141605
2011-10-10Object: add getSectionAlignment.Michael J. Spencer1-0/+10
llvm-svn: 141581
2011-10-07Fix GCC again.Michael J. Spencer1-1/+1
llvm-svn: 141389
2011-10-07Change relocation API to be per section. This time without breaking GCC.Michael J. Spencer1-79/+301
llvm-svn: 141385
2011-10-07Revert 141376 and 141377 due to breaking the build.Bill Wendling1-301/+79
--- Reverse-merging r141377 into '.': U tools/llvm-objdump/MachODump.cpp --- Reverse-merging r141376 into '.': U include/llvm/Object/COFF.h U include/llvm/Object/ObjectFile.h U include/llvm-c/Object.h U tools/llvm-objdump/llvm-objdump.cpp U lib/Object/MachOObjectFile.cpp U lib/Object/COFFObjectFile.cpp U lib/Object/Object.cpp U lib/Object/ELFObjectFile.cpp llvm-svn: 141379
2011-10-07Change relocation API to be per section.Michael J. Spencer1-79/+301
llvm-svn: 141376
2011-09-28Object: Add isSection{Data,BSS}.Michael J. Spencer1-0/+28
llvm-svn: 140721
2011-09-14Object: make the following changes into SymbolRefBenjamin Kramer1-1/+78
- Add enum SymbolType and function getSymbolType() - Add function isGlobal() - it's returns true for symbols that can be used in another objects, such as library functions. - Rename function getAddress() to getOffset() and add new function getAddress(), because currently getAddress() returns section offset of symbol first byte. new getAddress() return symbol address. - Change usage SymbolRef::getAddress() to getOffset() in tools/llvm-nm and tools/llvm-objdump. Patch by Danil Malyshev! llvm-svn: 139683
2011-09-08Add support for relocations to ObjectFile.Benjamin Kramer1-12/+280
Patch by Danil Malyshev! llvm-svn: 139314
2011-07-15ObjectFile: Add a method to check whether a section contains a symbol.Benjamin Kramer1-0/+12
- No ELF or COFF implementation yet, I don't have a way to test that. Should be straightforward to add though. llvm-svn: 135288
2011-06-25Object: Add proper error handling.Michael J. Spencer1-62/+100
llvm-svn: 133872
2011-06-25Make Binary the parent of ObjectFile and update children to new interface.Michael J. Spencer1-20/+22
llvm-svn: 133870
2011-06-13Revert the last two commits in the series. r132911, r132912.Michael J. Spencer1-22/+20
llvm-svn: 132913
2011-06-13Make Binary the parent of ObjectFile and update children to new interface.Michael J. Spencer1-20/+22
llvm-svn: 132911
2011-04-03Assorted bugfixes in object file handling:Eric Christopher1-0/+2
- Adds support for sniffing PE/COFF files on win32 (.exe and .dll) which are COFF files that have an MS-DOS compatibility stub on the front of them. - Fixes a bug in the COFFObjectFile's support for the Microsoft COFF extension for long symbol names, wherein it was attempting to parse the leading '/' in an extended symbol name reference as part of the integer offset. - Fixes bugs in COFFObjectFile and ELFObjectFile wherein section and symbol iterators were being returned with uninitialized bytes; the type DataRefImpl is a union between 2 32-bit words (d.a and d.b) and a single intptr_t word (p). Only p was being initialized, so in 32-bit builds the result would be iterators with random upper 32-bit words in their DataRefImpls. This caused random failures when seeking around in object files. Patch by Graydon Hoare! llvm-svn: 128799
2011-01-21Object: Fix type punned pointer issues by making DataRefImpl a union and ↵Michael J. Spencer1-60/+40
using intptr_t. llvm-svn: 123962
2011-01-20Object: Add ELF support.Michael J. Spencer1-0/+706
llvm-svn: 123896
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