Sam Clegg
eb3c37f6e1
This relocation is needed for WASM64 to support location-relative memory addresses, which are used e.g. in profile instrumentation (for CounterPtr in __llvm_profile_data). Without this, the compiler falls back to absolute relocations and drops the subtraction, resulting in malformed profile data. Fixes: https://github.com/emscripten-core/emscripten/issues/26865
88 lines
2.6 KiB
C++
88 lines
2.6 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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llvm::StringRef 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_TAG:
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return "WASM_SYMBOL_TYPE_TAG";
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}
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llvm_unreachable("unknown symbol type");
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}
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llvm::StringRef 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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llvm::StringRef llvm::wasm::sectionTypeToString(uint32_t Type) {
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#define ECase(X) \
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case wasm::WASM_SEC_##X: \
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return #X;
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switch (Type) {
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ECase(CUSTOM);
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ECase(TYPE);
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ECase(IMPORT);
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ECase(FUNCTION);
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ECase(TABLE);
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ECase(MEMORY);
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ECase(GLOBAL);
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ECase(EXPORT);
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ECase(START);
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ECase(ELEM);
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ECase(CODE);
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ECase(DATA);
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ECase(DATACOUNT);
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ECase(TAG);
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default:
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llvm_unreachable("unknown section type");
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}
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#undef ECase
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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_MEMORY_ADDR_TLS_SLEB64:
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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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case R_WASM_MEMORY_ADDR_LOCREL_I64:
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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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