| commit | 1eb859d342c142f4e1ad1627cb80acc3b9d5f2e8 | [log] [tgz] |
|---|---|---|
| author | Derek Schuff <dschuff@chromium.org> | Wed Feb 07 11:51:19 2024 -0800 |
| committer | Copybara-Service <copybara-worker@google.com> | Wed Feb 07 11:55:42 2024 -0800 |
| tree | 142f0bb7808a660eda7c0aab0e4917dc3644e517 | |
| parent | a8f9114b901cc648adc203b7d2ad0cc86573c8c2 [diff] |
[Object][Wasm] Use file offset for section addresses in linked wasm files (#80529) Wasm has no unified virtual memory space as other object formats and architectures do, so previously WasmObjectFile reported 0 for all section addresses, and until 428cf71ff used section offsets for function symbols. Now we use file offsets for function symbols, and this change switches section addresses to do the same (in linked files). The main result of this is that objdump now reports VMAs in section listings, and also uses file offets rather than section offsets when disassembling linked binaries (matching the behavior of other disassemblers and stack traces produced by browwsers). To make this work, this PR also updates objdump's generation of synthetics fallback symbols to match lib/Object and also correctly plumbs symbol types for regular and dummy symbols through to the backend to avoid needing special knowledge of address 0. This also paves the way for generating symbols from name sections rather than symbol tables or imports (see #76107) by allowing the disassembler's synthetic fallback symbols match the name-section generated symbols (in a followup PR). GitOrigin-RevId: 8b0f47bfa4b6aa1bafa10261444c93aba5a2d31d
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.