fc0aa8424c
In GNU ld, the definition precedence is: regular symbol assignment > relocatable object definition > `PROVIDE` symbol assignment. GNU ld's internal linker scripts define the non-reserved (by C and C++) edata/end/etext with `PROVIDE` so the relocatable object definition takes precedence. This makes sense because `int end;` is valid. We currently redefine such symbols if they are COMMON, but not if they are regular definitions, so `int end;` with -fcommon is essentially a UB in ld.lld. Fix this (also improve consistency and match GNU ld) by using the `isDefined` code path for `isCommon`. In GNU ld, reserved identifiers like `__ehdr_start` do not use `PROVIDE`, while we treat them all as `PROVIDE`, this seems fine. Reviewed By: peter.smith Differential Revision: https://reviews.llvm.org/D120389 |
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| .. | ||
| cmake/modules | ||
| COFF | ||
| Common | ||
| docs | ||
| ELF | ||
| include/lld | ||
| MachO | ||
| MinGW | ||
| test | ||
| tools/lld | ||
| utils | ||
| wasm | ||
| .clang-format | ||
| .clang-tidy | ||
| .gitignore | ||
| CMakeLists.txt | ||
| CODE_OWNERS.TXT | ||
| LICENSE.TXT | ||
| README.md | ||
LLVM Linker (lld)
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.
Benchmarking
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.