| commit | 363b89c48bc8ac5de79b559f83429eaa93dd47a4 | [log] [tgz] |
|---|---|---|
| author | Sam Clegg <sbc@chromium.org> | Tue Mar 26 19:46:15 2019 +0000 |
| committer | Sam Clegg <sbc@chromium.org> | Tue Mar 26 19:46:15 2019 +0000 |
| tree | f96fd1be40eafa8f2c742da1216bbd8d347ea2ea | |
| parent | 47903c2c1f7dbc9debad42737bce119bfa770c95 [diff] |
[WebAssembly] Initial implementation of PIC code generation This change implements lowering of references global symbols in PIC mode. This change implements lowering of global references in PIC mode using a new @GOT reference type. @GOT references can be used with function or data symbol names combined with the get_global instruction. In this case the linker will insert the wasm global that stores the address of the symbol (either in memory for data symbols or in the wasm table for function symbols). For now I'm continuing to use the R_WASM_GLOBAL_INDEX_LEB relocation type for this type of reference which means that this relocation type can refer to either a global or a function or data symbol. We could choose to introduce specific relocation types for GOT entries in the future. See the current dynamic linking proposal: https://github.com/WebAssembly/tool-conventions/blob/master/DynamicLinking.md Differential Revision: https://reviews.llvm.org/D54647 git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@357022 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.