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llvm-capstone/lld
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Fangrui Song 4645311933 [ELF] --emit-relocs: adjust offsets of .rel[a].eh_frame relocations 
Two code paths may reach the EHFrame case in SectionBase::getOffset:

* .eh_frame reference
* relocation copy for --emit-relocs

The first may be used by clang_rt.crtbegin.o and GCC crtbeginT.o to get the
start address of the output .eh_frame. The relocation has an offset of 0 or
(x86-64 PC-relative leaq for clang_rt.crtbegin.o) -4. The current code just
returns `offset`, which handles this case well.

The second is related to InputSection::copyRelocations on .eh_frame (used by
--emit-relocs). .eh_frame pieces may be dropped due to GC/ICF, so we should
convert the input offset to the output offset. Use the same way as
MergeInputSection with a special case handling outSecOff==-1 for an invalid
piece (see eh-frame-marker.s).

This exposes an issue in mips64-eh-abs-reloc.s that we don't reliably
handle anyway. Just add --no-check-dynamic-relocations to paper over it.

Differential Revision: https://reviews.llvm.org/D122459
2022-03-29 09:51:41 -07:00
..
cmake/modules [CMake] Factor out config prefix finding logic 2022-01-07 20:16:18 +00:00
COFF [Option] Avoid using the default argument for the 3-argument hasFlag. NFC 2022-03-26 00:57:06 -07:00
Common Cleanup codegen includes 2022-03-16 08:43:00 +01:00
docs [ELF] Move section assignment from initializeSymbols to postParse 2022-03-15 19:24:41 -07:00
ELF [ELF] --emit-relocs: adjust offsets of .rel[a].eh_frame relocations 2022-03-29 09:51:41 -07:00
include/lld [lld] Make error handling functions opaque 2022-02-17 11:54:57 -08:00
MachO [lld][Macho][NFC] Encapsulate priorities map in a priority class 2022-03-23 13:57:26 -04:00
MinGW [LLD][MinGW] Add --heap argument support 2022-01-30 00:01:45 +02:00
test [ELF] --emit-relocs: adjust offsets of .rel[a].eh_frame relocations 2022-03-29 09:51:41 -07:00
tools/lld [LLD] Fix issue in HIP due to unspecified order of evaluation of the function object 2022-02-08 19:12:15 -05:00
utils
wasm [lld][WebAssembly] Fix crash accessing non-live __tls_base symbol 2022-03-17 13:59:45 -07:00
.clang-format
.clang-tidy NFC: .clang-tidy: Inherit configs from parents to improve maintainability 2021-06-08 08:25:59 -07:00
.gitignore
CMakeLists.txt [lld] Require C++14 in LLD standalone build 2022-02-22 18:15:29 -05:00
CODE_OWNERS.TXT
LICENSE.TXT
README.md [doc] Place sha256 in lld/README.md into backticks 2021-01-12 10:19:40 -08:00

README.md

LLVM Linker (lld)

This directory and its subdirectories contain source code for the LLVM Linker, a modular cross platform linker which is built as part of the LLVM compiler infrastructure project.

lld is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt.

Benchmarking

In order to make sure various developers can evaluate patches over the same tests, we create a collection of self contained programs.

It is hosted at https://s3-us-west-2.amazonaws.com/linker-tests/lld-speed-test.tar.xz

The current sha256 is 10eec685463d5a8bbf08d77f4ca96282161d396c65bd97dc99dbde644a31610f.