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7b6a89f346
Some linker scripts don't converge. https://reviews.llvm.org/D66279 ("[ELF] Make LinkerScript::assignAddresses iterative") detected convergence of symbol assignments. This patch detects convergence of output section addresses. While input sections might also have convergence issues, they are less common as expressions that could cause convergence issues typically involve output sections and symbol assignments. GNU ld has an error `non constant or forward reference address expression for section` that correctly rejects ``` SECTIONS { .text ADDR(.data)+0x1000 : { *(.text) } .data : { *(.data) } } ``` but not the following variant: ``` SECTIONS { .text foo : { *(.text) } .data : { *(.data) } foo = ADDR(.data)+0x1000; } ``` Our approach consistently rejects both cases. Link: https://discourse.llvm.org/t/lld-and-layout-convergence/79232 Pull Request: https://github.com/llvm/llvm-project/pull/93888
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.