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9526edaf68
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
61 lines
1.9 KiB
C++
61 lines
1.9 KiB
C++
//===-- llvm/BinaryFormat/Wasm.cpp -------------------------------*- C++-*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/BinaryFormat/Wasm.h"
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std::string llvm::wasm::toString(wasm::WasmSymbolType Type) {
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switch (Type) {
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case wasm::WASM_SYMBOL_TYPE_FUNCTION:
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return "WASM_SYMBOL_TYPE_FUNCTION";
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case wasm::WASM_SYMBOL_TYPE_GLOBAL:
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return "WASM_SYMBOL_TYPE_GLOBAL";
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case wasm::WASM_SYMBOL_TYPE_TABLE:
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return "WASM_SYMBOL_TYPE_TABLE";
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case wasm::WASM_SYMBOL_TYPE_DATA:
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return "WASM_SYMBOL_TYPE_DATA";
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case wasm::WASM_SYMBOL_TYPE_SECTION:
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return "WASM_SYMBOL_TYPE_SECTION";
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case wasm::WASM_SYMBOL_TYPE_EVENT:
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return "WASM_SYMBOL_TYPE_EVENT";
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}
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llvm_unreachable("unknown symbol type");
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}
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std::string llvm::wasm::relocTypetoString(uint32_t Type) {
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switch (Type) {
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#define WASM_RELOC(NAME, VALUE) \
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case VALUE: \
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return #NAME;
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#include "llvm/BinaryFormat/WasmRelocs.def"
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#undef WASM_RELOC
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default:
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llvm_unreachable("unknown reloc type");
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}
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}
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bool llvm::wasm::relocTypeHasAddend(uint32_t Type) {
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switch (Type) {
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case R_WASM_MEMORY_ADDR_LEB:
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case R_WASM_MEMORY_ADDR_LEB64:
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case R_WASM_MEMORY_ADDR_SLEB:
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case R_WASM_MEMORY_ADDR_SLEB64:
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case R_WASM_MEMORY_ADDR_REL_SLEB:
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case R_WASM_MEMORY_ADDR_REL_SLEB64:
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case R_WASM_MEMORY_ADDR_I32:
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case R_WASM_MEMORY_ADDR_I64:
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case R_WASM_MEMORY_ADDR_TLS_SLEB:
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case R_WASM_FUNCTION_OFFSET_I32:
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case R_WASM_FUNCTION_OFFSET_I64:
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case R_WASM_SECTION_OFFSET_I32:
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case R_WASM_MEMORY_ADDR_LOCREL_I32:
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return true;
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default:
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return false;
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}
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}
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