History

Rui Ueyama 6a9ef8550c Remove default values which are always overwritten. llvm-svn: 261913		2016-02-25 18:49:09 +00:00
..
CMakeLists.txt	ELF: Implement ICF.	2016-02-25 18:43:51 +00:00
Config.h	ELF: Implement ICF.	2016-02-25 18:43:51 +00:00
Driver.cpp	ELF: Implement ICF.	2016-02-25 18:43:51 +00:00
Driver.h	ELF: Remove readLinkerScript and define LinkerScript::read instead.	2016-02-11 21:38:55 +00:00
DriverUtils.cpp	Re-submit ELF: Report multiple errors from the driver.	2016-02-02 21:13:09 +00:00
Error.cpp	ELF: Make link() to take an output stream to which error messages are written.	2016-02-02 22:49:32 +00:00
Error.h	ELF: Make link() to take an output stream to which error messages are written.	2016-02-02 22:49:32 +00:00
ICF.cpp	ELF: Implement ICF.	2016-02-25 18:43:51 +00:00
ICF.h	ELF: Implement ICF.	2016-02-25 18:43:51 +00:00
InputFiles.cpp	ELF: Implement ICF.	2016-02-25 18:43:51 +00:00
InputFiles.h	Add initial LTO support.	2016-02-12 20:54:57 +00:00
InputSection.cpp	ELF: Implement ICF.	2016-02-25 18:43:51 +00:00
InputSection.h	Remove default values which are always overwritten.	2016-02-25 18:49:09 +00:00
LinkerScript.cpp	[ELF] - replaced std::function with raw pointers in LinkerScript.cpp	2016-02-24 09:21:47 +00:00
LinkerScript.h	[ELF] - Linkerscript KEEP command.	2016-02-23 07:47:54 +00:00
MarkLive.cpp	[ELF] - Referencing __start or __stop should keep the section from GC.	2016-02-25 08:40:26 +00:00
Options.td	ELF: Implement ICF.	2016-02-25 18:43:51 +00:00
OutputSections.cpp	ELF: Implement ICF.	2016-02-25 18:43:51 +00:00
OutputSections.h	[ELF] - Referencing __start or __stop should keep the section from GC.	2016-02-25 08:40:26 +00:00
README.md	ELF: Write about the current policy to README.	2016-02-02 23:45:54 +00:00
SymbolTable.cpp	Handle a weak undefined tls to archive member.	2016-02-22 23:19:29 +00:00
SymbolTable.h	Add initial LTO support.	2016-02-12 20:54:57 +00:00
Symbols.cpp	ELF: Implement ICF.	2016-02-25 18:43:51 +00:00
Symbols.h	ELF: Implement ICF.	2016-02-25 18:43:51 +00:00
Target.cpp	[ELF][MIPS] Add STO_MIPS_PLT flag to the symbols require pointer equality	2016-02-25 16:19:15 +00:00
Target.h	Move target independent code out of x86_64 only path.	2016-02-24 18:24:23 +00:00
Writer.cpp	[ELF] - Referencing __start or __stop should keep the section from GC.	2016-02-25 08:40:26 +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 "Hello world" can be linked on Linux/PPC64 and on Linux/AArch64 or FreeBSD/AArch64.

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.

Library Use

You can embed LLD to your program by linking against it and calling the linker's entry point function lld::elf2::link.

The current policy is that it is your reponsibility to give trustworthy object files. The function is guaranteed to return as long as you do not pass corrupted or malicious object files. A corrupted file could cause a fatal error or SEGV. That being said, you don't need to worry too much about it if you create object files in a usual way and give them to the linker (it is naturally expected to work, or otherwise it's a linker's bug.)