| commit | da500e5aed5ef532c0c7d7b4ab62835c29d1dd8f | [log] [tgz] |
|---|---|---|
| author | Fangrui Song <maskray@google.com> | Sat Aug 24 00:41:15 2019 +0000 |
| committer | Fangrui Song <maskray@google.com> | Sat Aug 24 00:41:15 2019 +0000 |
| tree | 588b7791db5d39ce4e85e0b81d7ed689e1fc9ca7 | |
| parent | 8092d5178aa3aeff34f04aaecb6e6c541bd8cbba [diff] |
[ELF] Align the first section of a PT_LOAD even if its type is SHT_NOBITS Reported at https://reviews.llvm.org/D64930#1642223 If the only section of a PT_LOAD is a SHT_NOBITS section (e.g. .bss), we may not align its sh_offset. p_offset of the PT_LOAD will be set to sh_offset, and we will get p_offset!=p_vaddr (mod p_align). If such executable is mapped by the Linux kernel, it will segfault. After D64906, this may happen the non-linker script case. The linker script case has had this issue for a long time. This was fixed by rL321657 (but the test linkerscript/nobits-offset.s failed to test a SHT_NOBITS section), but broken by rL345154. Reviewed By: peter.smith Differential Revision: https://reviews.llvm.org/D66658 git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@369828 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.