MCDisassembler.cpp
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//===- MCDisassembler.cpp - Disassembler interface ------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/MC/MCDisassembler/MCDisassembler.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
using namespace llvm;
MCDisassembler::~MCDisassembler() = default;
Optional<MCDisassembler::DecodeStatus>
MCDisassembler::onSymbolStart(SymbolInfoTy &Symbol, uint64_t &Size,
ArrayRef<uint8_t> Bytes, uint64_t Address,
raw_ostream &CStream) const {
return None;
}
bool MCDisassembler::tryAddingSymbolicOperand(MCInst &Inst, int64_t Value,
uint64_t Address, bool IsBranch,
uint64_t Offset,
uint64_t InstSize) const {
if (Symbolizer)
return Symbolizer->tryAddingSymbolicOperand(
Inst, *CommentStream, Value, Address, IsBranch, Offset, InstSize);
return false;
}
void MCDisassembler::tryAddingPcLoadReferenceComment(int64_t Value,
uint64_t Address) const {
if (Symbolizer)
Symbolizer->tryAddingPcLoadReferenceComment(*CommentStream, Value, Address);
}
void MCDisassembler::setSymbolizer(std::unique_ptr<MCSymbolizer> Symzer) {
Symbolizer = std::move(Symzer);
}
#define SMC_PCASE(A, P) \
case XCOFF::XMC_##A: \
return P;
static uint8_t getSMCPriority(XCOFF::StorageMappingClass SMC) {
switch (SMC) {
SMC_PCASE(PR, 1)
SMC_PCASE(RO, 1)
SMC_PCASE(DB, 1)
SMC_PCASE(GL, 1)
SMC_PCASE(XO, 1)
SMC_PCASE(SV, 1)
SMC_PCASE(SV64, 1)
SMC_PCASE(SV3264, 1)
SMC_PCASE(TI, 1)
SMC_PCASE(TB, 1)
SMC_PCASE(RW, 1)
SMC_PCASE(TC0, 0)
SMC_PCASE(TC, 1)
SMC_PCASE(TD, 1)
SMC_PCASE(DS, 1)
SMC_PCASE(UA, 1)
SMC_PCASE(BS, 1)
SMC_PCASE(UC, 1)
SMC_PCASE(TL, 1)
SMC_PCASE(UL, 1)
SMC_PCASE(TE, 1)
#undef SMC_PCASE
}
return 0;
}
/// The function is for symbol sorting when symbols have the same address.
/// The symbols in the same section are sorted in ascending order.
/// llvm-objdump -D will choose the highest priority symbol to display when
/// there are symbols with the same address.
bool XCOFFSymbolInfo::operator<(const XCOFFSymbolInfo &SymInfo) const {
// Label symbols have higher priority than non-label symbols.
if (IsLabel != SymInfo.IsLabel)
return SymInfo.IsLabel;
// Symbols with a StorageMappingClass have higher priority than those without.
if (StorageMappingClass.hasValue() != SymInfo.StorageMappingClass.hasValue())
return SymInfo.StorageMappingClass.hasValue();
if (StorageMappingClass.hasValue()) {
return getSMCPriority(StorageMappingClass.getValue()) <
getSMCPriority(SymInfo.StorageMappingClass.getValue());
}
return false;
}