History

Rui Ueyama d7e4a281c4 ELF: Make some functions constant. NFC. This is a preparation for ICF. llvm-svn: 261710		2016-02-24 00:23:13 +00:00
..
CMakeLists.txt	Set the folder for libraries to 'lld libraries'. NFC.	2016-01-07 00:14:04 +00:00
Config.h	ELF: Create LinkerScript class to move code out of Writer.	2016-02-11 21:17:59 +00:00
Driver.cpp	Handle bitcode files in archive files with --whole-archive.	2016-02-23 18:17:11 +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
InputFiles.cpp	Handle bitcode files in archive files with --whole-archive.	2016-02-23 18:17:11 +00:00
InputFiles.h	Add initial LTO support.	2016-02-12 20:54:57 +00:00
InputSection.cpp	ELF: Make some functions constant. NFC.	2016-02-24 00:23:13 +00:00
InputSection.h	ELF: Make some functions constant. NFC.	2016-02-24 00:23:13 +00:00
LinkerScript.cpp	[ELF] - Linkerscript KEEP command.	2016-02-23 07:47:54 +00:00
LinkerScript.h	[ELF] - Linkerscript KEEP command.	2016-02-23 07:47:54 +00:00
MarkLive.cpp	[ELF] - Linkerscript KEEP command.	2016-02-23 07:47:54 +00:00
Options.td	[ELF] Implemented -Bsymbolic-functions command line option	2016-02-02 09:28:53 +00:00
OutputSections.cpp	Fix the aarch64 logic for dynamic relocations.	2016-02-23 20:19:44 +00:00
OutputSections.h	Fix the aarch64 logic for dynamic relocations.	2016-02-23 20:19:44 +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	Handle bitcode files in archive files with --whole-archive.	2016-02-23 18:17:11 +00:00
Symbols.h	Remove a trivial getter.	2016-02-22 23:16:05 +00:00
Target.cpp	Fix the aarch64 logic for dynamic relocations.	2016-02-23 20:19:44 +00:00
Target.h	Simplify. NFC.	2016-02-23 18:53:29 +00:00
Writer.cpp	Fix the aarch64 logic for dynamic relocations.	2016-02-23 20:19:44 +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.)