| commit | 32d194cec65e82812a815dd1adfb8b9f5d2f49dc | [log] [tgz] |
|---|---|---|
| author | Peter Smith <peter.smith@linaro.org> | Thu Jan 10 16:08:23 2019 +0000 |
| committer | Peter Smith <peter.smith@linaro.org> | Thu Jan 10 16:08:23 2019 +0000 |
| tree | fa0c177a00c801c1299fe866bab2b5ba835b1bc0 | |
| parent | cbe4fc0a72ae9115fe59cc9a204226f7ecce322b [diff] |
[ELF] Fix ARM and Thumb V7PILongThunk overflow behavior. When the range between the source and target of a V7PILongThunk exceeded an int32 we would trigger a relocation out of range error for the R_ARM_MOVT_PREL or R_ARM_THM_MOVT_PREL relocation. This case can happen when linking the linux kernel as it is loaded above 0xf0000000. There are two parts to the fix. - Remove the overflow check for R_ARM_MOVT_PREL or R_ARM_THM_MOVT_PREL. The ELF for the ARM Architecture document defines these relocations as having no overflow checking so the check was spurious. - Use int64_t for the offset calculation, in line with similar thunks so that PC + (S - P) < 32-bits. This results in less surprising disassembly. Differential Revision: https://reviews.llvm.org/D56396 git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@350836 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.