Jacek Caban
0f2432581d
On ARM64X targets, CRT provides separate TLS directory chunks, expecting the linker to sort it out. TLS directory uses _tls_start and _tls_end symbols to reference .tls section. Those symbols use section sorting to ensure that they are emitted at the start and end of .tls section, but that's not enough when we have two separate chunks for views: only one of them can really be the first one. Following MSVC, merge those chunks instead so that both symbol tables point to the same chunk. Additionally apply the same logic to _tls_used and _tls_index. This allows entire TLS directory to be shared between EC and native views. To achieve that, CRT additionally needs to mark each TLS callback with -arm64xsameaddress. This matches how MSVC linker and libraries work, but it requires EC and native views to use the same set of TLS callbacks. We may emit separate TLS directories in the future to make it more robust. (cherry picked from commit e096d2f60dbc6cab991d5c02a5f7125a6dc694dc)
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.