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| author | Yuta Saito <kateinoigakukun@gmail.com> | 2021-03-08 11:23:33 -0800 |
|---|---|---|
| committer | Sam Clegg <sbc@chromium.org> | 2021-03-08 11:34:10 -0800 |
| commit | aa0c571a5fa9130ccd932f9b6970440a1bae177f (patch) | |
| tree | 05f5d6418d8126ce18c65017f675d22d6f363ec4 /llvm/lib/Object/WasmObjectFile.cpp | |
| parent | d9a29a67527fbabd0e0388aefa8e6aa9b19f3f03 (diff) | |
| download | llvm-aa0c571a5fa9130ccd932f9b6970440a1bae177f.zip llvm-aa0c571a5fa9130ccd932f9b6970440a1bae177f.tar.gz llvm-aa0c571a5fa9130ccd932f9b6970440a1bae177f.tar.bz2 | |
[WebAssembly] Add new relocation for location relative data
This `R_WASM_MEMORY_ADDR_SELFREL_I32` relocation represents an offset
between its relocating address and the symbol address. It's very similar
to `R_X86_64_PC32` but restricted to be used for only data segments.
```
S + A - P
```
A: Represents the addend used to compute the value of the relocatable
field.
P: Represents the place of the storage unit being relocated.
S: Represents the value of the symbol whose index resides in the
relocation entry.
Proposal: https://github.com/WebAssembly/tool-conventions/issues/162
Differential Revision: https://reviews.llvm.org/D96659
Diffstat (limited to 'llvm/lib/Object/WasmObjectFile.cpp')
| -rw-r--r-- | llvm/lib/Object/WasmObjectFile.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/lib/Object/WasmObjectFile.cpp b/llvm/lib/Object/WasmObjectFile.cpp index 7fbb186..1a0958a 100644 --- a/llvm/lib/Object/WasmObjectFile.cpp +++ b/llvm/lib/Object/WasmObjectFile.cpp @@ -905,6 +905,7 @@ Error WasmObjectFile::parseRelocSection(StringRef Name, ReadContext &Ctx) { case wasm::R_WASM_MEMORY_ADDR_I32: case wasm::R_WASM_MEMORY_ADDR_REL_SLEB: case wasm::R_WASM_MEMORY_ADDR_TLS_SLEB: + case wasm::R_WASM_MEMORY_ADDR_LOCREL_I32: if (!isValidDataSymbol(Reloc.Index)) return make_error<GenericBinaryError>("invalid relocation data index", object_error::parse_failed); @@ -953,6 +954,7 @@ Error WasmObjectFile::parseRelocSection(StringRef Name, ReadContext &Ctx) { Size = 10; if (Reloc.Type == wasm::R_WASM_TABLE_INDEX_I32 || Reloc.Type == wasm::R_WASM_MEMORY_ADDR_I32 || + Reloc.Type == wasm::R_WASM_MEMORY_ADDR_LOCREL_I32 || Reloc.Type == wasm::R_WASM_SECTION_OFFSET_I32 || Reloc.Type == wasm::R_WASM_FUNCTION_OFFSET_I32 || Reloc.Type == wasm::R_WASM_GLOBAL_INDEX_I32) |