| commit | fe72faf864f337e6f81b864be51f1210d23ee1ba | [log] [tgz] |
|---|---|---|
| author | Fangrui Song <i@maskray.me> | Tue Nov 21 07:43:29 2023 -0800 |
| committer | Copybara-Service <copybara-worker@google.com> | Tue Nov 21 07:45:51 2023 -0800 |
| tree | bf6142b200c99a00695d09e5644b4f6e81d9622b | |
| parent | df623b255f26a9e39957249bd832e11bbbec172b [diff] |
[ELF] Support R_RISCV_SET_ULEB128/R_RISCV_SUB_ULEB128 in non-SHF_ALLOC sections (#72610) For a label difference like `.uleb128 A-B`, MC generates a pair of R_RISCV_SET_ULEB128/R_RISCV_SUB_ULEB128 if A-B cannot be folded as a constant. GNU assembler generates a pair of relocations in more cases (when A or B is in a code section with linker relaxation). `.uleb128 A-B` is primarily used by DWARF v5 .debug_loclists/.debug_rnglists (DW_LLE_offset_pair/DW_RLE_offset_pair entry kinds) implemented in Clang and GCC. `.uleb128 A-B` can be used in SHF_ALLOC sections as well (e.g. `.gcc_except_table`). This patch does not handle SHF_ALLOC. `-z dead-reloc-in-nonalloc=` can be used to change the relocated value, if the R_RISCV_SET_ULEB128 symbol is in a discarded section. We don't check the R_RISCV_SUB_ULEB128 symbol since for the expected cases A and B should be defined in the same input section. GitOrigin-RevId: 7ffabb61a5569444b5ac9322e22e5471cc5e4a77
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.