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43 Commits

Author SHA1 Message Date
Michael J. Spencer 126973ba93 [Object] Split the ELF interface into 3 parts. 
* 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
 2013-08-08 22:27:13 +00:00
Michael J. Spencer df1ecbd734 Replace Count{Leading,Trailing}Zeros_{32,64} with count{Leading,Trailing}Zeros. 
llvm-svn: 182680
 2013-05-24 22:23:49 +00:00
Michael J. Spencer 39678d836c [Support] Add LLVM_IS_UNALIGNED_ACCESS_FAST. 
llvm-svn: 174271
 2013-02-03 10:48:31 +00:00
Michael J. Spencer 1a79161fe3 [Object][ELF] Simplify ELFObjectFile by using ELFType. 
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
 2013-01-15 07:44:25 +00:00
Michael J. Spencer bae14cef80 [Object][ELF] Add a maximum alignment. This is used by createELFObjectFile to create a properly aligned reader. 
llvm-svn: 171520
 2013-01-04 20:36:28 +00:00
Preston Gurd cc31af9328 Implement GDB integration for source level debugging of code JITed using 
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
 2012-04-16 22:12:58 +00:00
Eli Bendersky c7d23ddbbb Expose the ELFObjectFile class directly in the Object/ELF.h header, similarly 
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
 2012-02-12 06:12:10 +00:00
Dylan Noblesmith 1d966ae18e Object: avoid undefined behavior when bounds-checking 
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
 2012-02-04 02:41:39 +00:00
Matt Beaumont-Gay 88297ef665 Sink assert-only variables into the asserts 
llvm-svn: 148849
 2012-01-24 19:43:30 +00:00
Matt Beaumont-Gay 54db64e2e4 Silence warnings in -asserts build 
llvm-svn: 148715
 2012-01-23 18:46:04 +00:00
Eli Bendersky c3c80f0986 Basic runtime dynamic loading capabilities added to ELFObjectFile, implemented 
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
 2012-01-22 09:01:03 +00:00
Danil Malyshev cbe72fc959 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: 145408
 2011-11-29 17:40:10 +00:00
Chandler Carruth 37ab257b88 Revert r145180 as it is causing test failures on all the bots. 
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
 2011-11-27 10:37:47 +00:00
Danil Malyshev 2631f93f7d 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: 145180
 2011-11-27 10:12:52 +00:00
Owen Anderson 7be76590e6 Expand relocation type field to 64 bits. MachO scattered relocations require 33 bits of type info. 
llvm-svn: 143032
 2011-10-26 17:08:49 +00:00
Michael J. Spencer 1d19f97ea5 Object: Add some types to SymbolRef::Type. 
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
 2011-10-17 23:55:06 +00:00
Michael J. Spencer 321731539e Object: Add isSymbolAbsolute and getSymbolSection. 
llvm-svn: 142317
 2011-10-17 23:54:46 +00:00
Michael J. Spencer 017597540e Object: Add isSymbolWeak. 
llvm-svn: 142316
 2011-10-17 23:54:22 +00:00
Michael J. Spencer 4f91c2f2bd Object: Implement casting for concrete classes. 
llvm-svn: 142314
 2011-10-17 23:53:37 +00:00
Michael J. Spencer d39466760a Object: Fix redundant name. 
llvm-svn: 142238
 2011-10-17 20:19:29 +00:00
Michael J. Spencer 834bd602e6 ELF: Fix the section that relocations apply to. Add test to verify. Patch by Danil Malyshev! 
llvm-svn: 141901
 2011-10-13 22:30:10 +00:00
Nick Lewycky d3043965b9 Elf_Word is not POD! Stop using it in a DenseMap. 
llvm-svn: 141851
 2011-10-13 03:30:21 +00:00
NAKAMURA Takumi 9bfcf77638 lib/Object/ELFObjectFile.cpp: Fix undefined behavior for 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
 2011-10-12 10:28:55 +00:00
Nick Lewycky 43f01cae95 Reapply r141605 with fixes for appropriate handling of reserved section numbers 
in st_shndx fields.

llvm-svn: 141639
 2011-10-11 03:18:58 +00:00
Nick Lewycky 7adc4370e0 Add support for .symtab_shnidx. Unfortunately, doing this required breaking a 
layer of abstraction around SymbolRef where you can read its private
SymbolPimpl member.

llvm-svn: 141636
 2011-10-11 02:57:48 +00:00