| commit | 480d28e744ceff6424b566b3a6fae76b5906ed33 | [log] [tgz] |
|---|---|---|
| author | Fangrui Song <maskray@google.com> | Fri Mar 15 01:29:57 2019 +0000 |
| committer | Fangrui Song <maskray@google.com> | Fri Mar 15 01:29:57 2019 +0000 |
| tree | 233d950f1f06f541bed7e3800a66fef9698c1493 | |
| parent | 89d00592a0929786ade3dba80dd7de5dc9f54d2c [diff] |
[ELF] Split RW PT_LOAD on the PT_GNU_RELRO boundary Summary: Based on Peter Collingbourne's suggestion in D56828. Before D56828: PT_LOAD(.data PT_GNU_RELRO(.data.rel.ro .bss.rel.ro) .bss) Old: PT_LOAD(PT_GNU_RELRO(.data.rel.ro .bss.rel.ro) .data .bss) New: PT_LOAD(PT_GNU_RELRO(.data.rel.ro .bss.rel.ro)) PT_LOAD(.data. .bss) The new layout reflects the runtime memory mappings. By having two PT_LOAD segments, we can utilize the NOBITS part of the first PT_LOAD and save bytes for .bss.rel.ro. .bss.rel.ro is currently small and only used by copy relocations of symbols in read-only segments, but it can be used for other purposes in the future, e.g. if a relro section's statically relocated data is all zeros, we can move it to .bss.rel.ro. Reviewers: espindola, ruiu, pcc Reviewed By: ruiu Subscribers: nemanjai, jvesely, nhaehnle, javed.absar, kbarton, emaste, arichardson, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D58892 git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@356226 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.