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https://github.com/RPCS3/llvm-mirror.git
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611bb9dd5e
The MC layer doesn't currently emit relocations in offset order for the entire code section so this check was causing failures on the wasm waterfall. Perhaps we can re-instate this check if we divide the relocations per-function, or add extra ordering the MC object writer. Differential Revision: https://reviews.llvm.org/D44136 llvm-svn: 326765
1237 lines
41 KiB
C++
1237 lines
41 KiB
C++
//===- WasmObjectFile.cpp - Wasm object file implementation ---------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/DenseSet.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/ADT/StringSet.h"
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#include "llvm/ADT/Triple.h"
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#include "llvm/BinaryFormat/Wasm.h"
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#include "llvm/MC/SubtargetFeature.h"
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#include "llvm/Object/Binary.h"
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#include "llvm/Object/Error.h"
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#include "llvm/Object/ObjectFile.h"
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#include "llvm/Object/SymbolicFile.h"
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#include "llvm/Object/Wasm.h"
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#include "llvm/Support/Endian.h"
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#include "llvm/Support/Error.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/LEB128.h"
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#include <algorithm>
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#include <cassert>
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#include <cstdint>
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#include <cstring>
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#include <system_error>
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#define DEBUG_TYPE "wasm-object"
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using namespace llvm;
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using namespace object;
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Expected<std::unique_ptr<WasmObjectFile>>
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ObjectFile::createWasmObjectFile(MemoryBufferRef Buffer) {
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Error Err = Error::success();
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auto ObjectFile = llvm::make_unique<WasmObjectFile>(Buffer, Err);
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if (Err)
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return std::move(Err);
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return std::move(ObjectFile);
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}
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#define VARINT7_MAX ((1<<7)-1)
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#define VARINT7_MIN (-(1<<7))
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#define VARUINT7_MAX (1<<7)
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#define VARUINT1_MAX (1)
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static uint8_t readUint8(const uint8_t *&Ptr) { return *Ptr++; }
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static uint32_t readUint32(const uint8_t *&Ptr) {
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uint32_t Result = support::endian::read32le(Ptr);
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Ptr += sizeof(Result);
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return Result;
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}
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static int32_t readFloat32(const uint8_t *&Ptr) {
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int32_t Result = 0;
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memcpy(&Result, Ptr, sizeof(Result));
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Ptr += sizeof(Result);
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return Result;
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}
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static int64_t readFloat64(const uint8_t *&Ptr) {
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int64_t Result = 0;
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memcpy(&Result, Ptr, sizeof(Result));
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Ptr += sizeof(Result);
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return Result;
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}
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static uint64_t readULEB128(const uint8_t *&Ptr) {
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unsigned Count;
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uint64_t Result = decodeULEB128(Ptr, &Count);
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Ptr += Count;
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return Result;
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}
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static StringRef readString(const uint8_t *&Ptr) {
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uint32_t StringLen = readULEB128(Ptr);
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StringRef Return = StringRef(reinterpret_cast<const char *>(Ptr), StringLen);
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Ptr += StringLen;
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return Return;
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}
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static int64_t readLEB128(const uint8_t *&Ptr) {
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unsigned Count;
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uint64_t Result = decodeSLEB128(Ptr, &Count);
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Ptr += Count;
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return Result;
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}
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static uint8_t readVaruint1(const uint8_t *&Ptr) {
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int64_t result = readLEB128(Ptr);
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assert(result <= VARUINT1_MAX && result >= 0);
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return result;
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}
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static int32_t readVarint32(const uint8_t *&Ptr) {
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int64_t result = readLEB128(Ptr);
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assert(result <= INT32_MAX && result >= INT32_MIN);
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return result;
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}
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static uint32_t readVaruint32(const uint8_t *&Ptr) {
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uint64_t result = readULEB128(Ptr);
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assert(result <= UINT32_MAX);
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return result;
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}
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static int64_t readVarint64(const uint8_t *&Ptr) {
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return readLEB128(Ptr);
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}
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static uint8_t readOpcode(const uint8_t *&Ptr) {
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return readUint8(Ptr);
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}
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static Error readInitExpr(wasm::WasmInitExpr &Expr, const uint8_t *&Ptr) {
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Expr.Opcode = readOpcode(Ptr);
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switch (Expr.Opcode) {
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case wasm::WASM_OPCODE_I32_CONST:
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Expr.Value.Int32 = readVarint32(Ptr);
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break;
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case wasm::WASM_OPCODE_I64_CONST:
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Expr.Value.Int64 = readVarint64(Ptr);
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break;
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case wasm::WASM_OPCODE_F32_CONST:
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Expr.Value.Float32 = readFloat32(Ptr);
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break;
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case wasm::WASM_OPCODE_F64_CONST:
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Expr.Value.Float64 = readFloat64(Ptr);
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break;
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case wasm::WASM_OPCODE_GET_GLOBAL:
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Expr.Value.Global = readULEB128(Ptr);
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break;
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default:
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return make_error<GenericBinaryError>("Invalid opcode in init_expr",
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object_error::parse_failed);
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}
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uint8_t EndOpcode = readOpcode(Ptr);
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if (EndOpcode != wasm::WASM_OPCODE_END) {
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return make_error<GenericBinaryError>("Invalid init_expr",
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object_error::parse_failed);
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}
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return Error::success();
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}
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static wasm::WasmLimits readLimits(const uint8_t *&Ptr) {
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wasm::WasmLimits Result;
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Result.Flags = readVaruint1(Ptr);
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Result.Initial = readVaruint32(Ptr);
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if (Result.Flags & wasm::WASM_LIMITS_FLAG_HAS_MAX)
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Result.Maximum = readVaruint32(Ptr);
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return Result;
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}
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static wasm::WasmTable readTable(const uint8_t *&Ptr) {
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wasm::WasmTable Table;
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Table.ElemType = readUint8(Ptr);
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Table.Limits = readLimits(Ptr);
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return Table;
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}
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static Error readSection(WasmSection &Section, const uint8_t *&Ptr,
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const uint8_t *Start, const uint8_t *Eof) {
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Section.Offset = Ptr - Start;
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Section.Type = readUint8(Ptr);
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uint32_t Size = readVaruint32(Ptr);
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if (Size == 0)
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return make_error<StringError>("Zero length section",
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object_error::parse_failed);
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if (Ptr + Size > Eof)
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return make_error<StringError>("Section too large",
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object_error::parse_failed);
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Section.Content = ArrayRef<uint8_t>(Ptr, Size);
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Ptr += Size;
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return Error::success();
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}
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WasmObjectFile::WasmObjectFile(MemoryBufferRef Buffer, Error &Err)
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: ObjectFile(Binary::ID_Wasm, Buffer) {
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ErrorAsOutParameter ErrAsOutParam(&Err);
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Header.Magic = getData().substr(0, 4);
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if (Header.Magic != StringRef("\0asm", 4)) {
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Err = make_error<StringError>("Bad magic number",
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object_error::parse_failed);
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return;
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}
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const uint8_t *Eof = getPtr(getData().size());
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const uint8_t *Ptr = getPtr(4);
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if (Ptr + 4 > Eof) {
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Err = make_error<StringError>("Missing version number",
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object_error::parse_failed);
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return;
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}
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Header.Version = readUint32(Ptr);
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if (Header.Version != wasm::WasmVersion) {
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Err = make_error<StringError>("Bad version number",
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object_error::parse_failed);
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return;
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}
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WasmSection Sec;
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while (Ptr < Eof) {
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if ((Err = readSection(Sec, Ptr, getPtr(0), Eof)))
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return;
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if ((Err = parseSection(Sec)))
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return;
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Sections.push_back(Sec);
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}
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}
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Error WasmObjectFile::parseSection(WasmSection &Sec) {
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const uint8_t* Start = Sec.Content.data();
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const uint8_t* End = Start + Sec.Content.size();
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switch (Sec.Type) {
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case wasm::WASM_SEC_CUSTOM:
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return parseCustomSection(Sec, Start, End);
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case wasm::WASM_SEC_TYPE:
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return parseTypeSection(Start, End);
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case wasm::WASM_SEC_IMPORT:
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return parseImportSection(Start, End);
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case wasm::WASM_SEC_FUNCTION:
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return parseFunctionSection(Start, End);
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case wasm::WASM_SEC_TABLE:
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return parseTableSection(Start, End);
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case wasm::WASM_SEC_MEMORY:
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return parseMemorySection(Start, End);
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case wasm::WASM_SEC_GLOBAL:
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return parseGlobalSection(Start, End);
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case wasm::WASM_SEC_EXPORT:
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return parseExportSection(Start, End);
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case wasm::WASM_SEC_START:
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return parseStartSection(Start, End);
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case wasm::WASM_SEC_ELEM:
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return parseElemSection(Start, End);
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case wasm::WASM_SEC_CODE:
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return parseCodeSection(Start, End);
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case wasm::WASM_SEC_DATA:
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return parseDataSection(Start, End);
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default:
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return make_error<GenericBinaryError>("Bad section type",
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object_error::parse_failed);
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}
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}
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Error WasmObjectFile::parseNameSection(const uint8_t *Ptr, const uint8_t *End) {
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llvm::DenseSet<uint64_t> Seen;
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if (Functions.size() != FunctionTypes.size()) {
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return make_error<GenericBinaryError>("Names must come after code section",
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object_error::parse_failed);
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}
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while (Ptr < End) {
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uint8_t Type = readUint8(Ptr);
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uint32_t Size = readVaruint32(Ptr);
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const uint8_t *SubSectionEnd = Ptr + Size;
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switch (Type) {
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case wasm::WASM_NAMES_FUNCTION: {
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uint32_t Count = readVaruint32(Ptr);
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while (Count--) {
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uint32_t Index = readVaruint32(Ptr);
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if (!Seen.insert(Index).second)
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return make_error<GenericBinaryError>("Function named more than once",
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object_error::parse_failed);
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StringRef Name = readString(Ptr);
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if (!isValidFunctionIndex(Index) || Name.empty())
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return make_error<GenericBinaryError>("Invalid name entry",
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object_error::parse_failed);
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DebugNames.push_back(wasm::WasmFunctionName{Index, Name});
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if (isDefinedFunctionIndex(Index)) {
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// Override any existing name; the name specified by the "names"
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// section is the Function's canonical name.
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getDefinedFunction(Index).Name = Name;
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}
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}
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break;
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}
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// Ignore local names for now
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case wasm::WASM_NAMES_LOCAL:
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default:
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Ptr += Size;
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break;
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}
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if (Ptr != SubSectionEnd)
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return make_error<GenericBinaryError>("Name sub-section ended prematurely",
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object_error::parse_failed);
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}
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if (Ptr != End)
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return make_error<GenericBinaryError>("Name section ended prematurely",
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object_error::parse_failed);
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return Error::success();
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}
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Error WasmObjectFile::parseLinkingSection(const uint8_t *Ptr,
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const uint8_t *End) {
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HasLinkingSection = true;
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if (Functions.size() != FunctionTypes.size()) {
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return make_error<GenericBinaryError>(
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"Linking data must come after code section", object_error::parse_failed);
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}
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while (Ptr < End) {
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uint8_t Type = readUint8(Ptr);
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uint32_t Size = readVaruint32(Ptr);
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const uint8_t *SubSectionEnd = Ptr + Size;
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switch (Type) {
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case wasm::WASM_SYMBOL_TABLE:
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if (Error Err = parseLinkingSectionSymtab(Ptr, SubSectionEnd))
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return Err;
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break;
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case wasm::WASM_SEGMENT_INFO: {
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uint32_t Count = readVaruint32(Ptr);
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if (Count > DataSegments.size())
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return make_error<GenericBinaryError>("Too many segment names",
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object_error::parse_failed);
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for (uint32_t i = 0; i < Count; i++) {
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DataSegments[i].Data.Name = readString(Ptr);
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DataSegments[i].Data.Alignment = readVaruint32(Ptr);
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DataSegments[i].Data.Flags = readVaruint32(Ptr);
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}
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break;
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}
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case wasm::WASM_INIT_FUNCS: {
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uint32_t Count = readVaruint32(Ptr);
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LinkingData.InitFunctions.reserve(Count);
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for (uint32_t i = 0; i < Count; i++) {
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wasm::WasmInitFunc Init;
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Init.Priority = readVaruint32(Ptr);
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Init.Symbol = readVaruint32(Ptr);
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if (!isValidFunctionSymbol(Init.Symbol))
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return make_error<GenericBinaryError>("Invalid function symbol: " +
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Twine(Init.Symbol),
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object_error::parse_failed);
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LinkingData.InitFunctions.emplace_back(Init);
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}
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break;
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}
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case wasm::WASM_COMDAT_INFO:
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if (Error Err = parseLinkingSectionComdat(Ptr, SubSectionEnd))
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return Err;
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break;
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default:
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Ptr += Size;
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break;
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}
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if (Ptr != SubSectionEnd)
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return make_error<GenericBinaryError>(
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"Linking sub-section ended prematurely", object_error::parse_failed);
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}
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if (Ptr != End)
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return make_error<GenericBinaryError>("Linking section ended prematurely",
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object_error::parse_failed);
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return Error::success();
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}
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Error WasmObjectFile::parseLinkingSectionSymtab(const uint8_t *&Ptr,
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const uint8_t *End) {
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uint32_t Count = readVaruint32(Ptr);
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LinkingData.SymbolTable.reserve(Count);
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Symbols.reserve(Count);
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StringSet<> SymbolNames;
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std::vector<wasm::WasmImport *> ImportedGlobals;
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std::vector<wasm::WasmImport *> ImportedFunctions;
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ImportedGlobals.reserve(Imports.size());
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ImportedFunctions.reserve(Imports.size());
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for (auto &I : Imports) {
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if (I.Kind == wasm::WASM_EXTERNAL_FUNCTION)
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ImportedFunctions.emplace_back(&I);
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else if (I.Kind == wasm::WASM_EXTERNAL_GLOBAL)
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ImportedGlobals.emplace_back(&I);
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}
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while (Count--) {
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wasm::WasmSymbolInfo Info;
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const wasm::WasmSignature *FunctionType = nullptr;
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const wasm::WasmGlobalType *GlobalType = nullptr;
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Info.Kind = readUint8(Ptr);
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Info.Flags = readVaruint32(Ptr);
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bool IsDefined = (Info.Flags & wasm::WASM_SYMBOL_UNDEFINED) == 0;
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switch (Info.Kind) {
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case wasm::WASM_SYMBOL_TYPE_FUNCTION:
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Info.ElementIndex = readVaruint32(Ptr);
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if (!isValidFunctionIndex(Info.ElementIndex) ||
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IsDefined != isDefinedFunctionIndex(Info.ElementIndex))
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return make_error<GenericBinaryError>("invalid function symbol index",
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object_error::parse_failed);
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if (IsDefined) {
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Info.Name = readString(Ptr);
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unsigned FuncIndex = Info.ElementIndex - NumImportedFunctions;
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FunctionType = &Signatures[FunctionTypes[FuncIndex]];
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wasm::WasmFunction &Function = Functions[FuncIndex];
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if (Function.Name.empty()) {
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// Use the symbol's name to set a name for the Function, but only if
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// one hasn't already been set.
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Function.Name = Info.Name;
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}
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} else {
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wasm::WasmImport &Import = *ImportedFunctions[Info.ElementIndex];
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FunctionType = &Signatures[Import.SigIndex];
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Info.Name = Import.Field;
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}
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break;
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case wasm::WASM_SYMBOL_TYPE_GLOBAL:
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Info.ElementIndex = readVaruint32(Ptr);
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if (!isValidGlobalIndex(Info.ElementIndex) ||
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IsDefined != isDefinedGlobalIndex(Info.ElementIndex))
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return make_error<GenericBinaryError>("invalid global symbol index",
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object_error::parse_failed);
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if (IsDefined) {
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Info.Name = readString(Ptr);
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unsigned GlobalIndex = Info.ElementIndex - NumImportedGlobals;
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wasm::WasmGlobal &Global = Globals[GlobalIndex];
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GlobalType = &Global.Type;
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if (Global.Name.empty()) {
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// Use the symbol's name to set a name for the Global, but only if
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// one hasn't already been set.
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Global.Name = Info.Name;
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}
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} else {
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wasm::WasmImport &Import = *ImportedGlobals[Info.ElementIndex];
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Info.Name = Import.Field;
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GlobalType = &Import.Global;
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}
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break;
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case wasm::WASM_SYMBOL_TYPE_DATA:
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Info.Name = readString(Ptr);
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if (IsDefined) {
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uint32_t Index = readVaruint32(Ptr);
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if (Index >= DataSegments.size())
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return make_error<GenericBinaryError>("invalid data symbol index",
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object_error::parse_failed);
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uint32_t Offset = readVaruint32(Ptr);
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uint32_t Size = readVaruint32(Ptr);
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if (Offset + Size > DataSegments[Index].Data.Content.size())
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return make_error<GenericBinaryError>("invalid data symbol offset",
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object_error::parse_failed);
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Info.DataRef = wasm::WasmDataReference{Index, Offset, Size};
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}
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break;
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default:
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return make_error<GenericBinaryError>("Invalid symbol type",
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object_error::parse_failed);
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}
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if ((Info.Flags & wasm::WASM_SYMBOL_BINDING_MASK) !=
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wasm::WASM_SYMBOL_BINDING_LOCAL &&
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!SymbolNames.insert(Info.Name).second)
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return make_error<GenericBinaryError>("Duplicate symbol name " +
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Twine(Info.Name),
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object_error::parse_failed);
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LinkingData.SymbolTable.emplace_back(Info);
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Symbols.emplace_back(LinkingData.SymbolTable.back(), FunctionType,
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GlobalType);
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DEBUG(dbgs() << "Adding symbol: " << Symbols.back() << "\n");
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}
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return Error::success();
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}
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Error WasmObjectFile::parseLinkingSectionComdat(const uint8_t *&Ptr,
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const uint8_t *End)
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{
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uint32_t ComdatCount = readVaruint32(Ptr);
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StringSet<> ComdatSet;
|
|
while (ComdatCount--) {
|
|
StringRef Name = readString(Ptr);
|
|
if (Name.empty() || !ComdatSet.insert(Name).second)
|
|
return make_error<GenericBinaryError>("Bad/duplicate COMDAT name " + Twine(Name),
|
|
object_error::parse_failed);
|
|
Comdats.emplace_back(Name);
|
|
uint32_t Flags = readVaruint32(Ptr);
|
|
if (Flags != 0)
|
|
return make_error<GenericBinaryError>("Unsupported COMDAT flags",
|
|
object_error::parse_failed);
|
|
|
|
uint32_t EntryCount = readVaruint32(Ptr);
|
|
while (EntryCount--) {
|
|
unsigned Kind = readVaruint32(Ptr);
|
|
unsigned Index = readVaruint32(Ptr);
|
|
switch (Kind) {
|
|
default:
|
|
return make_error<GenericBinaryError>("Invalid COMDAT entry type",
|
|
object_error::parse_failed);
|
|
case wasm::WASM_COMDAT_DATA:
|
|
if (Index >= DataSegments.size())
|
|
return make_error<GenericBinaryError>("COMDAT data index out of range",
|
|
object_error::parse_failed);
|
|
if (!DataSegments[Index].Data.Comdat.empty())
|
|
return make_error<GenericBinaryError>("Data segment in two COMDATs",
|
|
object_error::parse_failed);
|
|
DataSegments[Index].Data.Comdat = Name;
|
|
break;
|
|
case wasm::WASM_COMDAT_FUNCTION:
|
|
if (!isDefinedFunctionIndex(Index))
|
|
return make_error<GenericBinaryError>("COMDAT function index out of range",
|
|
object_error::parse_failed);
|
|
if (!getDefinedFunction(Index).Comdat.empty())
|
|
return make_error<GenericBinaryError>("Function in two COMDATs",
|
|
object_error::parse_failed);
|
|
getDefinedFunction(Index).Comdat = Name;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return Error::success();
|
|
}
|
|
|
|
WasmSection* WasmObjectFile::findCustomSectionByName(StringRef Name) {
|
|
for (WasmSection& Section : Sections) {
|
|
if (Section.Type == wasm::WASM_SEC_CUSTOM && Section.Name == Name)
|
|
return &Section;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
WasmSection* WasmObjectFile::findSectionByType(uint32_t Type) {
|
|
assert(Type != wasm::WASM_SEC_CUSTOM);
|
|
for (WasmSection& Section : Sections) {
|
|
if (Section.Type == Type)
|
|
return &Section;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
Error WasmObjectFile::parseRelocSection(StringRef Name, const uint8_t *Ptr,
|
|
const uint8_t *End) {
|
|
uint8_t SectionCode = readUint8(Ptr);
|
|
WasmSection* Section = nullptr;
|
|
if (SectionCode == wasm::WASM_SEC_CUSTOM) {
|
|
StringRef Name = readString(Ptr);
|
|
Section = findCustomSectionByName(Name);
|
|
} else {
|
|
Section = findSectionByType(SectionCode);
|
|
}
|
|
if (!Section)
|
|
return make_error<GenericBinaryError>("Invalid section code",
|
|
object_error::parse_failed);
|
|
uint32_t RelocCount = readVaruint32(Ptr);
|
|
uint32_t EndOffset = Section->Content.size();
|
|
while (RelocCount--) {
|
|
wasm::WasmRelocation Reloc = {};
|
|
Reloc.Type = readVaruint32(Ptr);
|
|
Reloc.Offset = readVaruint32(Ptr);
|
|
Reloc.Index = readVaruint32(Ptr);
|
|
switch (Reloc.Type) {
|
|
case wasm::R_WEBASSEMBLY_FUNCTION_INDEX_LEB:
|
|
case wasm::R_WEBASSEMBLY_TABLE_INDEX_SLEB:
|
|
case wasm::R_WEBASSEMBLY_TABLE_INDEX_I32:
|
|
if (!isValidFunctionSymbol(Reloc.Index))
|
|
return make_error<GenericBinaryError>("Bad relocation function index",
|
|
object_error::parse_failed);
|
|
break;
|
|
case wasm::R_WEBASSEMBLY_TYPE_INDEX_LEB:
|
|
if (Reloc.Index >= Signatures.size())
|
|
return make_error<GenericBinaryError>("Bad relocation type index",
|
|
object_error::parse_failed);
|
|
break;
|
|
case wasm::R_WEBASSEMBLY_GLOBAL_INDEX_LEB:
|
|
if (!isValidGlobalSymbol(Reloc.Index))
|
|
return make_error<GenericBinaryError>("Bad relocation global index",
|
|
object_error::parse_failed);
|
|
break;
|
|
case wasm::R_WEBASSEMBLY_MEMORY_ADDR_LEB:
|
|
case wasm::R_WEBASSEMBLY_MEMORY_ADDR_SLEB:
|
|
case wasm::R_WEBASSEMBLY_MEMORY_ADDR_I32:
|
|
if (!isValidDataSymbol(Reloc.Index))
|
|
return make_error<GenericBinaryError>("Bad relocation data index",
|
|
object_error::parse_failed);
|
|
Reloc.Addend = readVarint32(Ptr);
|
|
break;
|
|
default:
|
|
return make_error<GenericBinaryError>("Bad relocation type: " +
|
|
Twine(Reloc.Type),
|
|
object_error::parse_failed);
|
|
}
|
|
|
|
// Relocations must fit inside the section, and must appear in order. They
|
|
// also shouldn't overlap a function/element boundary, but we don't bother
|
|
// to check that.
|
|
uint64_t Size = 5;
|
|
if (Reloc.Type == wasm::R_WEBASSEMBLY_TABLE_INDEX_I32 ||
|
|
Reloc.Type == wasm::R_WEBASSEMBLY_MEMORY_ADDR_I32)
|
|
Size = 4;
|
|
if (Reloc.Offset + Size > EndOffset)
|
|
return make_error<GenericBinaryError>("Bad relocation offset",
|
|
object_error::parse_failed);
|
|
|
|
Section->Relocations.push_back(Reloc);
|
|
}
|
|
if (Ptr != End)
|
|
return make_error<GenericBinaryError>("Reloc section ended prematurely",
|
|
object_error::parse_failed);
|
|
return Error::success();
|
|
}
|
|
|
|
Error WasmObjectFile::parseCustomSection(WasmSection &Sec,
|
|
const uint8_t *Ptr, const uint8_t *End) {
|
|
Sec.Name = readString(Ptr);
|
|
if (Sec.Name == "name") {
|
|
if (Error Err = parseNameSection(Ptr, End))
|
|
return Err;
|
|
} else if (Sec.Name == "linking") {
|
|
if (Error Err = parseLinkingSection(Ptr, End))
|
|
return Err;
|
|
} else if (Sec.Name.startswith("reloc.")) {
|
|
if (Error Err = parseRelocSection(Sec.Name, Ptr, End))
|
|
return Err;
|
|
}
|
|
return Error::success();
|
|
}
|
|
|
|
Error WasmObjectFile::parseTypeSection(const uint8_t *Ptr, const uint8_t *End) {
|
|
uint32_t Count = readVaruint32(Ptr);
|
|
Signatures.reserve(Count);
|
|
while (Count--) {
|
|
wasm::WasmSignature Sig;
|
|
Sig.ReturnType = wasm::WASM_TYPE_NORESULT;
|
|
uint8_t Form = readUint8(Ptr);
|
|
if (Form != wasm::WASM_TYPE_FUNC) {
|
|
return make_error<GenericBinaryError>("Invalid signature type",
|
|
object_error::parse_failed);
|
|
}
|
|
uint32_t ParamCount = readVaruint32(Ptr);
|
|
Sig.ParamTypes.reserve(ParamCount);
|
|
while (ParamCount--) {
|
|
uint32_t ParamType = readUint8(Ptr);
|
|
Sig.ParamTypes.push_back(ParamType);
|
|
}
|
|
uint32_t ReturnCount = readVaruint32(Ptr);
|
|
if (ReturnCount) {
|
|
if (ReturnCount != 1) {
|
|
return make_error<GenericBinaryError>(
|
|
"Multiple return types not supported", object_error::parse_failed);
|
|
}
|
|
Sig.ReturnType = readUint8(Ptr);
|
|
}
|
|
Signatures.push_back(Sig);
|
|
}
|
|
if (Ptr != End)
|
|
return make_error<GenericBinaryError>("Type section ended prematurely",
|
|
object_error::parse_failed);
|
|
return Error::success();
|
|
}
|
|
|
|
Error WasmObjectFile::parseImportSection(const uint8_t *Ptr, const uint8_t *End) {
|
|
uint32_t Count = readVaruint32(Ptr);
|
|
Imports.reserve(Count);
|
|
for (uint32_t i = 0; i < Count; i++) {
|
|
wasm::WasmImport Im;
|
|
Im.Module = readString(Ptr);
|
|
Im.Field = readString(Ptr);
|
|
Im.Kind = readUint8(Ptr);
|
|
switch (Im.Kind) {
|
|
case wasm::WASM_EXTERNAL_FUNCTION:
|
|
NumImportedFunctions++;
|
|
Im.SigIndex = readVaruint32(Ptr);
|
|
break;
|
|
case wasm::WASM_EXTERNAL_GLOBAL:
|
|
NumImportedGlobals++;
|
|
Im.Global.Type = readUint8(Ptr);
|
|
Im.Global.Mutable = readVaruint1(Ptr);
|
|
break;
|
|
case wasm::WASM_EXTERNAL_MEMORY:
|
|
Im.Memory = readLimits(Ptr);
|
|
break;
|
|
case wasm::WASM_EXTERNAL_TABLE:
|
|
Im.Table = readTable(Ptr);
|
|
if (Im.Table.ElemType != wasm::WASM_TYPE_ANYFUNC)
|
|
return make_error<GenericBinaryError>("Invalid table element type",
|
|
object_error::parse_failed);
|
|
break;
|
|
default:
|
|
return make_error<GenericBinaryError>(
|
|
"Unexpected import kind", object_error::parse_failed);
|
|
}
|
|
Imports.push_back(Im);
|
|
}
|
|
if (Ptr != End)
|
|
return make_error<GenericBinaryError>("Import section ended prematurely",
|
|
object_error::parse_failed);
|
|
return Error::success();
|
|
}
|
|
|
|
Error WasmObjectFile::parseFunctionSection(const uint8_t *Ptr, const uint8_t *End) {
|
|
uint32_t Count = readVaruint32(Ptr);
|
|
FunctionTypes.reserve(Count);
|
|
uint32_t NumTypes = Signatures.size();
|
|
while (Count--) {
|
|
uint32_t Type = readVaruint32(Ptr);
|
|
if (Type >= NumTypes)
|
|
return make_error<GenericBinaryError>("Invalid function type",
|
|
object_error::parse_failed);
|
|
FunctionTypes.push_back(Type);
|
|
}
|
|
if (Ptr != End)
|
|
return make_error<GenericBinaryError>("Function section ended prematurely",
|
|
object_error::parse_failed);
|
|
return Error::success();
|
|
}
|
|
|
|
Error WasmObjectFile::parseTableSection(const uint8_t *Ptr, const uint8_t *End) {
|
|
uint32_t Count = readVaruint32(Ptr);
|
|
Tables.reserve(Count);
|
|
while (Count--) {
|
|
Tables.push_back(readTable(Ptr));
|
|
if (Tables.back().ElemType != wasm::WASM_TYPE_ANYFUNC) {
|
|
return make_error<GenericBinaryError>("Invalid table element type",
|
|
object_error::parse_failed);
|
|
}
|
|
}
|
|
if (Ptr != End)
|
|
return make_error<GenericBinaryError>("Table section ended prematurely",
|
|
object_error::parse_failed);
|
|
return Error::success();
|
|
}
|
|
|
|
Error WasmObjectFile::parseMemorySection(const uint8_t *Ptr, const uint8_t *End) {
|
|
uint32_t Count = readVaruint32(Ptr);
|
|
Memories.reserve(Count);
|
|
while (Count--) {
|
|
Memories.push_back(readLimits(Ptr));
|
|
}
|
|
if (Ptr != End)
|
|
return make_error<GenericBinaryError>("Memory section ended prematurely",
|
|
object_error::parse_failed);
|
|
return Error::success();
|
|
}
|
|
|
|
Error WasmObjectFile::parseGlobalSection(const uint8_t *Ptr, const uint8_t *End) {
|
|
GlobalSection = Sections.size();
|
|
uint32_t Count = readVaruint32(Ptr);
|
|
Globals.reserve(Count);
|
|
while (Count--) {
|
|
wasm::WasmGlobal Global;
|
|
Global.Index = NumImportedGlobals + Globals.size();
|
|
Global.Type.Type = readUint8(Ptr);
|
|
Global.Type.Mutable = readVaruint1(Ptr);
|
|
if (Error Err = readInitExpr(Global.InitExpr, Ptr))
|
|
return Err;
|
|
Globals.push_back(Global);
|
|
}
|
|
if (Ptr != End)
|
|
return make_error<GenericBinaryError>("Global section ended prematurely",
|
|
object_error::parse_failed);
|
|
return Error::success();
|
|
}
|
|
|
|
Error WasmObjectFile::parseExportSection(const uint8_t *Ptr, const uint8_t *End) {
|
|
uint32_t Count = readVaruint32(Ptr);
|
|
Exports.reserve(Count);
|
|
for (uint32_t i = 0; i < Count; i++) {
|
|
wasm::WasmExport Ex;
|
|
Ex.Name = readString(Ptr);
|
|
Ex.Kind = readUint8(Ptr);
|
|
Ex.Index = readVaruint32(Ptr);
|
|
switch (Ex.Kind) {
|
|
case wasm::WASM_EXTERNAL_FUNCTION:
|
|
if (!isValidFunctionIndex(Ex.Index))
|
|
return make_error<GenericBinaryError>("Invalid function export",
|
|
object_error::parse_failed);
|
|
break;
|
|
case wasm::WASM_EXTERNAL_GLOBAL:
|
|
if (!isValidGlobalIndex(Ex.Index))
|
|
return make_error<GenericBinaryError>("Invalid global export",
|
|
object_error::parse_failed);
|
|
break;
|
|
case wasm::WASM_EXTERNAL_MEMORY:
|
|
case wasm::WASM_EXTERNAL_TABLE:
|
|
break;
|
|
default:
|
|
return make_error<GenericBinaryError>(
|
|
"Unexpected export kind", object_error::parse_failed);
|
|
}
|
|
Exports.push_back(Ex);
|
|
}
|
|
if (Ptr != End)
|
|
return make_error<GenericBinaryError>("Export section ended prematurely",
|
|
object_error::parse_failed);
|
|
return Error::success();
|
|
}
|
|
|
|
bool WasmObjectFile::isValidFunctionIndex(uint32_t Index) const {
|
|
return Index < NumImportedFunctions + FunctionTypes.size();
|
|
}
|
|
|
|
bool WasmObjectFile::isDefinedFunctionIndex(uint32_t Index) const {
|
|
return Index >= NumImportedFunctions && isValidFunctionIndex(Index);
|
|
}
|
|
|
|
bool WasmObjectFile::isValidGlobalIndex(uint32_t Index) const {
|
|
return Index < NumImportedGlobals + Globals.size();
|
|
}
|
|
|
|
bool WasmObjectFile::isDefinedGlobalIndex(uint32_t Index) const {
|
|
return Index >= NumImportedGlobals && isValidGlobalIndex(Index);
|
|
}
|
|
|
|
bool WasmObjectFile::isValidFunctionSymbol(uint32_t Index) const {
|
|
return Index < Symbols.size() && Symbols[Index].isTypeFunction();
|
|
}
|
|
|
|
bool WasmObjectFile::isValidGlobalSymbol(uint32_t Index) const {
|
|
return Index < Symbols.size() && Symbols[Index].isTypeGlobal();
|
|
}
|
|
|
|
bool WasmObjectFile::isValidDataSymbol(uint32_t Index) const {
|
|
return Index < Symbols.size() && Symbols[Index].isTypeData();
|
|
}
|
|
|
|
wasm::WasmFunction &WasmObjectFile::getDefinedFunction(uint32_t Index) {
|
|
assert(isDefinedFunctionIndex(Index));
|
|
return Functions[Index - NumImportedFunctions];
|
|
}
|
|
|
|
wasm::WasmGlobal &WasmObjectFile::getDefinedGlobal(uint32_t Index) {
|
|
assert(isDefinedGlobalIndex(Index));
|
|
return Globals[Index - NumImportedGlobals];
|
|
}
|
|
|
|
Error WasmObjectFile::parseStartSection(const uint8_t *Ptr, const uint8_t *End) {
|
|
StartFunction = readVaruint32(Ptr);
|
|
if (!isValidFunctionIndex(StartFunction))
|
|
return make_error<GenericBinaryError>("Invalid start function",
|
|
object_error::parse_failed);
|
|
return Error::success();
|
|
}
|
|
|
|
Error WasmObjectFile::parseCodeSection(const uint8_t *Ptr, const uint8_t *End) {
|
|
CodeSection = Sections.size();
|
|
const uint8_t *CodeSectionStart = Ptr;
|
|
uint32_t FunctionCount = readVaruint32(Ptr);
|
|
if (FunctionCount != FunctionTypes.size()) {
|
|
return make_error<GenericBinaryError>("Invalid function count",
|
|
object_error::parse_failed);
|
|
}
|
|
|
|
while (FunctionCount--) {
|
|
wasm::WasmFunction Function;
|
|
const uint8_t *FunctionStart = Ptr;
|
|
uint32_t Size = readVaruint32(Ptr);
|
|
const uint8_t *FunctionEnd = Ptr + Size;
|
|
|
|
Function.Index = NumImportedFunctions + Functions.size();
|
|
Function.CodeSectionOffset = FunctionStart - CodeSectionStart;
|
|
Function.Size = FunctionEnd - FunctionStart;
|
|
|
|
uint32_t NumLocalDecls = readVaruint32(Ptr);
|
|
Function.Locals.reserve(NumLocalDecls);
|
|
while (NumLocalDecls--) {
|
|
wasm::WasmLocalDecl Decl;
|
|
Decl.Count = readVaruint32(Ptr);
|
|
Decl.Type = readUint8(Ptr);
|
|
Function.Locals.push_back(Decl);
|
|
}
|
|
|
|
uint32_t BodySize = FunctionEnd - Ptr;
|
|
Function.Body = ArrayRef<uint8_t>(Ptr, BodySize);
|
|
Ptr += BodySize;
|
|
assert(Ptr == FunctionEnd);
|
|
Functions.push_back(Function);
|
|
}
|
|
if (Ptr != End)
|
|
return make_error<GenericBinaryError>("Code section ended prematurely",
|
|
object_error::parse_failed);
|
|
return Error::success();
|
|
}
|
|
|
|
Error WasmObjectFile::parseElemSection(const uint8_t *Ptr, const uint8_t *End) {
|
|
uint32_t Count = readVaruint32(Ptr);
|
|
ElemSegments.reserve(Count);
|
|
while (Count--) {
|
|
wasm::WasmElemSegment Segment;
|
|
Segment.TableIndex = readVaruint32(Ptr);
|
|
if (Segment.TableIndex != 0) {
|
|
return make_error<GenericBinaryError>("Invalid TableIndex",
|
|
object_error::parse_failed);
|
|
}
|
|
if (Error Err = readInitExpr(Segment.Offset, Ptr))
|
|
return Err;
|
|
uint32_t NumElems = readVaruint32(Ptr);
|
|
while (NumElems--) {
|
|
Segment.Functions.push_back(readVaruint32(Ptr));
|
|
}
|
|
ElemSegments.push_back(Segment);
|
|
}
|
|
if (Ptr != End)
|
|
return make_error<GenericBinaryError>("Elem section ended prematurely",
|
|
object_error::parse_failed);
|
|
return Error::success();
|
|
}
|
|
|
|
Error WasmObjectFile::parseDataSection(const uint8_t *Ptr, const uint8_t *End) {
|
|
DataSection = Sections.size();
|
|
const uint8_t *Start = Ptr;
|
|
uint32_t Count = readVaruint32(Ptr);
|
|
DataSegments.reserve(Count);
|
|
while (Count--) {
|
|
WasmSegment Segment;
|
|
Segment.Data.MemoryIndex = readVaruint32(Ptr);
|
|
if (Error Err = readInitExpr(Segment.Data.Offset, Ptr))
|
|
return Err;
|
|
uint32_t Size = readVaruint32(Ptr);
|
|
Segment.Data.Content = ArrayRef<uint8_t>(Ptr, Size);
|
|
Segment.Data.Alignment = 0;
|
|
Segment.Data.Flags = 0;
|
|
Segment.SectionOffset = Ptr - Start;
|
|
Ptr += Size;
|
|
DataSegments.push_back(Segment);
|
|
}
|
|
if (Ptr != End)
|
|
return make_error<GenericBinaryError>("Data section ended prematurely",
|
|
object_error::parse_failed);
|
|
return Error::success();
|
|
}
|
|
|
|
const uint8_t *WasmObjectFile::getPtr(size_t Offset) const {
|
|
return reinterpret_cast<const uint8_t *>(getData().substr(Offset, 1).data());
|
|
}
|
|
|
|
const wasm::WasmObjectHeader &WasmObjectFile::getHeader() const {
|
|
return Header;
|
|
}
|
|
|
|
void WasmObjectFile::moveSymbolNext(DataRefImpl &Symb) const { Symb.d.a++; }
|
|
|
|
uint32_t WasmObjectFile::getSymbolFlags(DataRefImpl Symb) const {
|
|
uint32_t Result = SymbolRef::SF_None;
|
|
const WasmSymbol &Sym = getWasmSymbol(Symb);
|
|
|
|
DEBUG(dbgs() << "getSymbolFlags: ptr=" << &Sym << " " << Sym << "\n");
|
|
if (Sym.isBindingWeak())
|
|
Result |= SymbolRef::SF_Weak;
|
|
if (!Sym.isBindingLocal())
|
|
Result |= SymbolRef::SF_Global;
|
|
if (Sym.isHidden())
|
|
Result |= SymbolRef::SF_Hidden;
|
|
if (!Sym.isDefined())
|
|
Result |= SymbolRef::SF_Undefined;
|
|
if (Sym.isTypeFunction())
|
|
Result |= SymbolRef::SF_Executable;
|
|
return Result;
|
|
}
|
|
|
|
basic_symbol_iterator WasmObjectFile::symbol_begin() const {
|
|
DataRefImpl Ref;
|
|
Ref.d.a = 0;
|
|
return BasicSymbolRef(Ref, this);
|
|
}
|
|
|
|
basic_symbol_iterator WasmObjectFile::symbol_end() const {
|
|
DataRefImpl Ref;
|
|
Ref.d.a = Symbols.size();
|
|
return BasicSymbolRef(Ref, this);
|
|
}
|
|
|
|
const WasmSymbol &WasmObjectFile::getWasmSymbol(const DataRefImpl &Symb) const {
|
|
return Symbols[Symb.d.a];
|
|
}
|
|
|
|
const WasmSymbol &WasmObjectFile::getWasmSymbol(const SymbolRef &Symb) const {
|
|
return getWasmSymbol(Symb.getRawDataRefImpl());
|
|
}
|
|
|
|
Expected<StringRef> WasmObjectFile::getSymbolName(DataRefImpl Symb) const {
|
|
return getWasmSymbol(Symb).Info.Name;
|
|
}
|
|
|
|
Expected<uint64_t> WasmObjectFile::getSymbolAddress(DataRefImpl Symb) const {
|
|
return getSymbolValue(Symb);
|
|
}
|
|
|
|
uint64_t WasmObjectFile::getWasmSymbolValue(const WasmSymbol& Sym) const {
|
|
switch (Sym.Info.Kind) {
|
|
case wasm::WASM_SYMBOL_TYPE_FUNCTION:
|
|
case wasm::WASM_SYMBOL_TYPE_GLOBAL:
|
|
return Sym.Info.ElementIndex;
|
|
case wasm::WASM_SYMBOL_TYPE_DATA: {
|
|
// The value of a data symbol is the segment offset, plus the symbol
|
|
// offset within the segment.
|
|
uint32_t SegmentIndex = Sym.Info.DataRef.Segment;
|
|
const wasm::WasmDataSegment &Segment = DataSegments[SegmentIndex].Data;
|
|
assert(Segment.Offset.Opcode == wasm::WASM_OPCODE_I32_CONST);
|
|
return Segment.Offset.Value.Int32 + Sym.Info.DataRef.Offset;
|
|
}
|
|
}
|
|
llvm_unreachable("invalid symbol type");
|
|
}
|
|
|
|
uint64_t WasmObjectFile::getSymbolValueImpl(DataRefImpl Symb) const {
|
|
return getWasmSymbolValue(getWasmSymbol(Symb));
|
|
}
|
|
|
|
uint32_t WasmObjectFile::getSymbolAlignment(DataRefImpl Symb) const {
|
|
llvm_unreachable("not yet implemented");
|
|
return 0;
|
|
}
|
|
|
|
uint64_t WasmObjectFile::getCommonSymbolSizeImpl(DataRefImpl Symb) const {
|
|
llvm_unreachable("not yet implemented");
|
|
return 0;
|
|
}
|
|
|
|
Expected<SymbolRef::Type>
|
|
WasmObjectFile::getSymbolType(DataRefImpl Symb) const {
|
|
const WasmSymbol &Sym = getWasmSymbol(Symb);
|
|
|
|
switch (Sym.Info.Kind) {
|
|
case wasm::WASM_SYMBOL_TYPE_FUNCTION:
|
|
return SymbolRef::ST_Function;
|
|
case wasm::WASM_SYMBOL_TYPE_GLOBAL:
|
|
return SymbolRef::ST_Other;
|
|
case wasm::WASM_SYMBOL_TYPE_DATA:
|
|
return SymbolRef::ST_Data;
|
|
}
|
|
|
|
llvm_unreachable("Unknown WasmSymbol::SymbolType");
|
|
return SymbolRef::ST_Other;
|
|
}
|
|
|
|
Expected<section_iterator>
|
|
WasmObjectFile::getSymbolSection(DataRefImpl Symb) const {
|
|
const WasmSymbol& Sym = getWasmSymbol(Symb);
|
|
if (Sym.isUndefined())
|
|
return section_end();
|
|
|
|
DataRefImpl Ref;
|
|
switch (Sym.Info.Kind) {
|
|
case wasm::WASM_SYMBOL_TYPE_FUNCTION:
|
|
Ref.d.a = CodeSection;
|
|
break;
|
|
case wasm::WASM_SYMBOL_TYPE_GLOBAL:
|
|
Ref.d.a = GlobalSection;
|
|
break;
|
|
case wasm::WASM_SYMBOL_TYPE_DATA:
|
|
Ref.d.a = DataSection;
|
|
break;
|
|
default:
|
|
llvm_unreachable("Unknown WasmSymbol::SymbolType");
|
|
}
|
|
return section_iterator(SectionRef(Ref, this));
|
|
}
|
|
|
|
void WasmObjectFile::moveSectionNext(DataRefImpl &Sec) const { Sec.d.a++; }
|
|
|
|
std::error_code WasmObjectFile::getSectionName(DataRefImpl Sec,
|
|
StringRef &Res) const {
|
|
const WasmSection &S = Sections[Sec.d.a];
|
|
#define ECase(X) \
|
|
case wasm::WASM_SEC_##X: \
|
|
Res = #X; \
|
|
break
|
|
switch (S.Type) {
|
|
ECase(TYPE);
|
|
ECase(IMPORT);
|
|
ECase(FUNCTION);
|
|
ECase(TABLE);
|
|
ECase(MEMORY);
|
|
ECase(GLOBAL);
|
|
ECase(EXPORT);
|
|
ECase(START);
|
|
ECase(ELEM);
|
|
ECase(CODE);
|
|
ECase(DATA);
|
|
case wasm::WASM_SEC_CUSTOM:
|
|
Res = S.Name;
|
|
break;
|
|
default:
|
|
return object_error::invalid_section_index;
|
|
}
|
|
#undef ECase
|
|
return std::error_code();
|
|
}
|
|
|
|
uint64_t WasmObjectFile::getSectionAddress(DataRefImpl Sec) const { return 0; }
|
|
|
|
uint64_t WasmObjectFile::getSectionIndex(DataRefImpl Sec) const {
|
|
return Sec.d.a;
|
|
}
|
|
|
|
uint64_t WasmObjectFile::getSectionSize(DataRefImpl Sec) const {
|
|
const WasmSection &S = Sections[Sec.d.a];
|
|
return S.Content.size();
|
|
}
|
|
|
|
std::error_code WasmObjectFile::getSectionContents(DataRefImpl Sec,
|
|
StringRef &Res) const {
|
|
const WasmSection &S = Sections[Sec.d.a];
|
|
// This will never fail since wasm sections can never be empty (user-sections
|
|
// must have a name and non-user sections each have a defined structure).
|
|
Res = StringRef(reinterpret_cast<const char *>(S.Content.data()),
|
|
S.Content.size());
|
|
return std::error_code();
|
|
}
|
|
|
|
uint64_t WasmObjectFile::getSectionAlignment(DataRefImpl Sec) const {
|
|
return 1;
|
|
}
|
|
|
|
bool WasmObjectFile::isSectionCompressed(DataRefImpl Sec) const {
|
|
return false;
|
|
}
|
|
|
|
bool WasmObjectFile::isSectionText(DataRefImpl Sec) const {
|
|
return getWasmSection(Sec).Type == wasm::WASM_SEC_CODE;
|
|
}
|
|
|
|
bool WasmObjectFile::isSectionData(DataRefImpl Sec) const {
|
|
return getWasmSection(Sec).Type == wasm::WASM_SEC_DATA;
|
|
}
|
|
|
|
bool WasmObjectFile::isSectionBSS(DataRefImpl Sec) const { return false; }
|
|
|
|
bool WasmObjectFile::isSectionVirtual(DataRefImpl Sec) const { return false; }
|
|
|
|
bool WasmObjectFile::isSectionBitcode(DataRefImpl Sec) const { return false; }
|
|
|
|
relocation_iterator WasmObjectFile::section_rel_begin(DataRefImpl Ref) const {
|
|
DataRefImpl RelocRef;
|
|
RelocRef.d.a = Ref.d.a;
|
|
RelocRef.d.b = 0;
|
|
return relocation_iterator(RelocationRef(RelocRef, this));
|
|
}
|
|
|
|
relocation_iterator WasmObjectFile::section_rel_end(DataRefImpl Ref) const {
|
|
const WasmSection &Sec = getWasmSection(Ref);
|
|
DataRefImpl RelocRef;
|
|
RelocRef.d.a = Ref.d.a;
|
|
RelocRef.d.b = Sec.Relocations.size();
|
|
return relocation_iterator(RelocationRef(RelocRef, this));
|
|
}
|
|
|
|
void WasmObjectFile::moveRelocationNext(DataRefImpl &Rel) const {
|
|
Rel.d.b++;
|
|
}
|
|
|
|
uint64_t WasmObjectFile::getRelocationOffset(DataRefImpl Ref) const {
|
|
const wasm::WasmRelocation &Rel = getWasmRelocation(Ref);
|
|
return Rel.Offset;
|
|
}
|
|
|
|
symbol_iterator WasmObjectFile::getRelocationSymbol(DataRefImpl Rel) const {
|
|
llvm_unreachable("not yet implemented");
|
|
SymbolRef Ref;
|
|
return symbol_iterator(Ref);
|
|
}
|
|
|
|
uint64_t WasmObjectFile::getRelocationType(DataRefImpl Ref) const {
|
|
const wasm::WasmRelocation &Rel = getWasmRelocation(Ref);
|
|
return Rel.Type;
|
|
}
|
|
|
|
void WasmObjectFile::getRelocationTypeName(
|
|
DataRefImpl Ref, SmallVectorImpl<char> &Result) const {
|
|
const wasm::WasmRelocation& Rel = getWasmRelocation(Ref);
|
|
StringRef Res = "Unknown";
|
|
|
|
#define WASM_RELOC(name, value) \
|
|
case wasm::name: \
|
|
Res = #name; \
|
|
break;
|
|
|
|
switch (Rel.Type) {
|
|
#include "llvm/BinaryFormat/WasmRelocs.def"
|
|
}
|
|
|
|
#undef WASM_RELOC
|
|
|
|
Result.append(Res.begin(), Res.end());
|
|
}
|
|
|
|
section_iterator WasmObjectFile::section_begin() const {
|
|
DataRefImpl Ref;
|
|
Ref.d.a = 0;
|
|
return section_iterator(SectionRef(Ref, this));
|
|
}
|
|
|
|
section_iterator WasmObjectFile::section_end() const {
|
|
DataRefImpl Ref;
|
|
Ref.d.a = Sections.size();
|
|
return section_iterator(SectionRef(Ref, this));
|
|
}
|
|
|
|
uint8_t WasmObjectFile::getBytesInAddress() const { return 4; }
|
|
|
|
StringRef WasmObjectFile::getFileFormatName() const { return "WASM"; }
|
|
|
|
Triple::ArchType WasmObjectFile::getArch() const { return Triple::wasm32; }
|
|
|
|
SubtargetFeatures WasmObjectFile::getFeatures() const {
|
|
return SubtargetFeatures();
|
|
}
|
|
|
|
bool WasmObjectFile::isRelocatableObject() const {
|
|
return HasLinkingSection;
|
|
}
|
|
|
|
const WasmSection &WasmObjectFile::getWasmSection(DataRefImpl Ref) const {
|
|
assert(Ref.d.a < Sections.size());
|
|
return Sections[Ref.d.a];
|
|
}
|
|
|
|
const WasmSection &
|
|
WasmObjectFile::getWasmSection(const SectionRef &Section) const {
|
|
return getWasmSection(Section.getRawDataRefImpl());
|
|
}
|
|
|
|
const wasm::WasmRelocation &
|
|
WasmObjectFile::getWasmRelocation(const RelocationRef &Ref) const {
|
|
return getWasmRelocation(Ref.getRawDataRefImpl());
|
|
}
|
|
|
|
const wasm::WasmRelocation &
|
|
WasmObjectFile::getWasmRelocation(DataRefImpl Ref) const {
|
|
assert(Ref.d.a < Sections.size());
|
|
const WasmSection& Sec = Sections[Ref.d.a];
|
|
assert(Ref.d.b < Sec.Relocations.size());
|
|
return Sec.Relocations[Ref.d.b];
|
|
}
|