llvm-project/lld
Fangrui Song ac0e6c6502 [ELF] Move (copy relocation/canonical PLT) before error checking
In processRelocAux(), we handle errors before copy relocation/canonical PLT.
This makes error checking a bit complex because we have to check for
conditions that will be allowed by copy relocation/canonical PLT.

Instead, move copy relocation/canonical PLT before error checking. This
simplifies the previous clumsy error checking code

`config->shared || (config->pie && expr == R_ABS && type != target->symbolicRel)`

to the simple `config->isPic`. Some diagnostics can be reported in
different ways. The code motion changes diagnostics for some contrived
test cases:

* copy-rel-pie-error.s -> copy-rel-pie2.s:
  It was rejected before but accepted now. ld.bfd also accepts the case.
* copy-errors.s: "cannot preempt symbol" changes to "symbol 'bar' has no type"
* got32{,x}-i386.s: the suggestion changes from "-fPIC or -Wl,-z,notext" to "-fPIE"
* x86-64-dyn-rel-error5.s: one diagnostic changes for -pie case

Reviewed By: peter.smith

Differential Revision: https://reviews.llvm.org/D66007

llvm-svn: 369262
2019-08-19 14:30:12 +00:00
..
COFF [LLD] Migrate llvm::make_unique to std::make_unique 2019-08-14 22:28:17 +00:00
Common [ELF] For VS-style diagnostics, prefer printing full paths in the header. 2019-08-09 08:29:03 +00:00
ELF [ELF] Move (copy relocation/canonical PLT) before error checking 2019-08-19 14:30:12 +00:00
MinGW [MinGW] Correct handling different forms of a few options 2019-08-14 09:35:44 +00:00
cmake/modules [CMake] Properly conditionalize installation of lld libraries 2018-03-09 13:09:36 +00:00
docs Bump the trunk version to 10.0.0svn 2019-07-18 11:51:05 +00:00
include/lld [LLD] Migrate llvm::make_unique to std::make_unique 2019-08-14 22:28:17 +00:00
lib [LLD] Migrate llvm::make_unique to std::make_unique 2019-08-14 22:28:17 +00:00
test [ELF] Move (copy relocation/canonical PLT) before error checking 2019-08-19 14:30:12 +00:00
tools/lld Fix build breakage on Darwin. 2019-07-11 06:12:18 +00:00
unittests Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
utils Python 2/3 compatibility 2019-03-20 07:42:13 +00:00
wasm [LLD] Migrate llvm::make_unique to std::make_unique 2019-08-14 22:28:17 +00:00
.arcconfig
.clang-format
.gitignore
CMakeLists.txt [CMake] Don't set Python_ADDITIONAL_VERSIONS 2019-07-18 15:17:42 +00:00
CODE_OWNERS.TXT
LICENSE.TXT Fix typos throughout the license files that somehow I and my reviewers 2019-01-21 09:52:34 +00:00
README.md

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.