commit | ebb4c26384a7245a44e9220a729afbf557d3a39a | [log] [tgz] |
---|---|---|
author | Fangrui Song <maskray@google.com> | Mon Jun 03 05:25:03 2019 +0000 |
committer | Fangrui Song <maskray@google.com> | Mon Jun 03 05:25:03 2019 +0000 |
tree | 25a0579873c771cfb346ef04ffd32e45bf00fa94 | |
parent | b28a85857a459c5d0a9e21d045290d5f9fe93eed [diff] |
[ELF] Simplify the condition to create .interp (1) {gcc,clang} -fuse-ld=bfd -pie -fPIE -nostdlib a.c => .interp created (2) {gcc,clang} -fuse-ld=lld -pie -fPIE -nostdlib a.c => .interp not created (3) {gcc,clang} -fuse-ld=lld -pie -fPIE -nostdlib a.c a.so => .interp created The inconsistency of (2) is due to the condition `!Config->SharedFiles.empty()`. To make lld behave more like ld.bfd, we could change the condition to: Config->HasDynSymTab && !Config->DynamicLinker.empty() && Script->needsInterpSection(); However, that would bring another inconsistency as can be observed with: (4) {gcc,clang} -fuse-ld=bfd -no-pie -nostdlib a.c => .interp not created So instead, use `!Config->DynamicLinker.empty() && Script->needsInterpSection()`, which is both simple and consistent in these cases. The inconsistency of (4) likely originated from ld.bfd and gold's choice to have a default --dynamic-linker. Their condition to create .interp is ANDed with (not -shared). Since lld doesn't have a default --dynamic-linker, compiler drivers (gcc/clang) don't pass --dynamic-linker for -shared, and direct ld users are not supposed to specify --dynamic-linker for -shared, we do not need the condition !Config->Shared. Reviewed By: ruiu Differential Revision: https://reviews.llvm.org/D62765 git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@362355 91177308-0d34-0410-b5e6-96231b3b80d8
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.
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.