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llvm-project/lld/ELF
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George Rimar 003be4fd58 [ELF] - implement support of extended length field for CIE/FDE records of eh_frame. 
Ian Lance Taylor writes: "Read 4 bytes. If they are not 0xffffffff, they are the length of the CIE or FDE record. Otherwise the next 64 bits holds the length, and this is a 64-bit DWARF format. This is like .debug_frame." (http://www.airs.com/blog/archives/460), that also consistent with spec (https://refspecs.linuxfoundation.org/LSB_3.0.0/LSB-PDA/LSB-PDA/ehframechpt.html).

Patch implements support of described extended length field and also adds few more checks for safety.

Differential revision: http://reviews.llvm.org/D15532

llvm-svn: 255883
 		2015-12-17 09:23:40 +00:00
..
CMakeLists.txt ELF2: Implement --gc-sections. 2015-10-22 18:49:53 +00:00
Config.h [ELF][MIPS] Handle R_MIPS_HI16/LO16 relocations against _gp_disp symbol 2015-12-16 14:45:09 +00:00
Driver.cpp ELF: Drop 'Sym' suffix from member function names for consistency. 2015-12-16 22:31:14 +00:00
Driver.h Simplify the InputFile type hierarchy. 2015-10-12 01:55:32 +00:00
DriverUtils.cpp Update lld to match llvm r250901. OptTable constructor now takes an ArrayRef. NFC 2015-10-21 16:31:56 +00:00
Error.cpp [ELF2] Output of all unknown arguments instead of only one. 2015-09-24 18:55:33 +00:00
Error.h [ELF2] Output of all unknown arguments instead of only one. 2015-09-24 18:55:33 +00:00
InputFiles.cpp ELF: Avoid string concatenation if there's no error. 2015-12-17 01:51:23 +00:00
InputFiles.h Make a function out-of-line. 2015-11-20 02:10:52 +00:00
InputSection.cpp ELF: Rename relocNeedsCopy -> needsCopyRel 2015-12-17 01:18:40 +00:00
InputSection.h [ELF][MIPS] Match paired relocation using relocation type and symbol index 2015-12-13 06:49:08 +00:00
LinkerScript.cpp [ELF] Lookup INPUT argument in the current directory 2015-11-26 20:23:46 +00:00
MarkLive.cpp Early continue. NFC. 2015-11-12 19:45:58 +00:00
Options.td Add --version-script= alias for --version-script 2015-12-10 14:08:45 +00:00
OutputSections.cpp [ELF] - implement support of extended length field for CIE/FDE records of eh_frame. 2015-12-17 09:23:40 +00:00
OutputSections.h [ELF] - implement support of extended length field for CIE/FDE records of eh_frame. 2015-12-17 09:23:40 +00:00
README.md ELF2: Add a note about performance. 2015-10-13 21:28:02 +00:00
SymbolTable.cpp ELF: Rename isTLS -> isTls for consistency. 2015-12-17 00:04:18 +00:00
SymbolTable.h ELF: Move shouldUseRela to Writer.cpp. 2015-12-16 23:33:56 +00:00
Symbols.cpp Typedef uintX_t at beginning of a function just like others. 2015-12-16 23:49:19 +00:00
Symbols.h ELF: Separate NeedsCopy and OffsetInBSS. 2015-12-17 01:14:23 +00:00
Target.cpp ELF: Rename relocNeedsCopy -> needsCopyRel 2015-12-17 01:18:40 +00:00
Target.h ELF: Rename relocNeedsCopy -> needsCopyRel 2015-12-17 01:18:40 +00:00
Writer.cpp ELF: Rename relocNeedsCopy -> needsCopyRel 2015-12-17 01:18:40 +00:00
Writer.h ELF2: Implement --gc-sections. 2015-10-22 18:49:53 +00:00

README.md

The New ELF Linker

This directory contains a port of the new PE/COFF linker for ELF.

Overall Design

See COFF/README.md for details on the design. Note that unlike COFF, we do not distinguish chunks from input sections; they are merged together.

Capabilities

This linker can link LLVM and Clang on Linux/x86-64 or FreeBSD/x86-64 with -LLVM_ENABLE_THREADS=OFF. "Hello world" can be linked on Linux/PPC64.

Performance

Achieving good performance is one of our goals. It's too early to reach a conclusion, but we are optimistic about that as it currently seems to be faster than GNU gold. It will be interesting to compare when we are close to feature parity.