llvm-project/llvm/lib/ObjectYAML
Thomas Lively f6f4f84378 [WebAssembly] Target features section
Summary:
Implements a new target features section in assembly and object files
that records what features are used, required, and disallowed in
WebAssembly objects. The linker uses this information to ensure that
all objects participating in a link are feature-compatible and records
the set of used features in the output binary for use by optimizers
and other tools later in the toolchain.

The "atomics" feature is always required or disallowed to prevent
linking code with stripped atomics into multithreaded binaries. Other
features are marked used if they are enabled globally or on any
function in a module.

Future CLs will add linker flags for ignoring feature compatibility
checks and for specifying the set of allowed features, implement using
the presence of the "atomics" feature to control the type of memory
and segments in the linked binary, and add front-end flags for
relaxing the linkage policy for atomics.

Reviewers: aheejin, sbc100, dschuff

Subscribers: jgravelle-google, hiraditya, sunfish, mgrang, jfb, jdoerfert, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D59173

llvm-svn: 356610
2019-03-20 20:26:45 +00:00
..
CMakeLists.txt Update obj2yaml and yaml2obj for .debug$H section. 2017-12-06 18:58:48 +00:00
COFFYAML.cpp [COFF] Add new relocation types. 2019-01-27 19:53:36 +00:00
CodeViewYAMLDebugSections.cpp Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
CodeViewYAMLSymbols.cpp Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
CodeViewYAMLTypeHashing.cpp Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
CodeViewYAMLTypes.cpp Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
DWARFEmitter.cpp Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
DWARFVisitor.cpp Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
DWARFVisitor.h Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
DWARFYAML.cpp Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
ELFYAML.cpp [yaml2obj]Allow explicit setting of p_filesz, p_memsz, and p_offset 2019-03-15 10:35:27 +00:00
LLVMBuild.txt Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
MachOYAML.cpp Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
ObjectYAML.cpp Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
WasmYAML.cpp [WebAssembly] Target features section 2019-03-20 20:26:45 +00:00
YAML.cpp [yaml::BinaryRef] Slight perf tuning (for llvm-exegesis analysis mode) 2019-02-06 08:57:01 +00:00