llvm-project/lld
Fangrui Song fbf41b5267 [ELF] Simplify sh_addr computation and warn if sh_addr is not a multiple of sh_addralign
See `docs/ELF/linker_script.rst` for the new computation for sh_addr and sh_addralign.
`ALIGN(section_align)` now means: "increase alignment to section_align"
(like yet another input section requirement).

The "start of section .foo changes from 0x11 to 0x20" warning no longer
makes sense. Change it to warn if sh_addr%sh_addralign!=0.

To decrease the alignment from the default max_input_align,
use `.output ALIGN(8) : {}` instead of `.output : ALIGN(8) {}`
See linkerscript/section-address-align.test as an example.

When both an output section address and ALIGN are set (can be seen as an
"undefined behavior" https://sourceware.org/ml/binutils/2020-03/msg00115.html),
lld may align more than GNU ld, but it makes a linker script working
with GNU ld hard to break with lld.

This patch can be considered as restoring part of the behavior before D74736.

Differential Revision: https://reviews.llvm.org/D75724
2020-03-11 09:35:42 -07:00
..
COFF [lld][ELF][COFF] Fix archived bitcode files naming 2020-03-04 12:46:31 +03:00
Common Make llvm::StringRef to std::string conversions explicit. 2020-01-28 23:25:25 +01:00
ELF [ELF] Simplify sh_addr computation and warn if sh_addr is not a multiple of sh_addralign 2020-03-11 09:35:42 -07:00
MinGW [lld] Replace SmallStr.str().str() with std::string conversion operator. 2020-01-29 21:30:21 -08:00
cmake/modules
docs [ELF] Simplify sh_addr computation and warn if sh_addr is not a multiple of sh_addralign 2020-03-11 09:35:42 -07:00
include/lld LLD already has a mechanism for caching creation of DWARCContext: 2020-03-06 21:17:07 +03:00
lib Make llvm::StringRef to std::string conversions explicit. 2020-01-28 23:25:25 +01:00
test [ELF] Simplify sh_addr computation and warn if sh_addr is not a multiple of sh_addralign 2020-03-11 09:35:42 -07:00
tools/lld Make it possible to redirect not only errs() but also outs() 2019-11-18 11:18:06 +09:00
unittests Make llvm::StringRef to std::string conversions explicit. 2020-01-28 23:25:25 +01:00
utils Python 2/3 compatibility 2019-03-20 07:42:13 +00:00
wasm [lld][WebAssembly] Add support for --rsp-quoting 2020-03-04 11:41:33 -08:00
.clang-format
.clang-tidy [lld] Add .clang-tidy to customize readability-identifier-naming.{Member,Parameter,Variable}Case => camelBack 2020-03-09 08:26:41 -07:00
.gitignore
CMakeLists.txt try to unbreak build after 4b6d9ac392 2020-01-16 10:12:35 -05:00
CODE_OWNERS.TXT
LICENSE.TXT Fix typos throughout the license files that somehow I and my reviewers 2019-01-21 09:52:34 +00:00
README.md

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.