forked from OSchip/llvm-project
98 lines
3.0 KiB
C++
98 lines
3.0 KiB
C++
//===- lib/MC/MCAtom.cpp - MCAtom 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/MC/MCAtom.h"
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#include "llvm/MC/MCModule.h"
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#include "llvm/Support/ErrorHandling.h"
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using namespace llvm;
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void MCAtom::addInst(const MCInst &I, uint64_t Address, unsigned Size) {
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assert(Type == TextAtom && "Trying to add MCInst to a non-text atom!");
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assert(Address < End+Size &&
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"Instruction not contiguous with end of atom!");
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if (Address > End)
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Parent->remap(this, Begin, End+Size);
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Text.push_back(std::make_pair(Address, I));
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}
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void MCAtom::addData(const MCData &D) {
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assert(Type == DataAtom && "Trying to add MCData to a non-data atom!");
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Parent->remap(this, Begin, End+1);
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Data.push_back(D);
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}
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MCAtom *MCAtom::split(uint64_t SplitPt) {
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assert((SplitPt > Begin && SplitPt <= End) &&
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"Splitting at point not contained in atom!");
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// Compute the new begin/end points.
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uint64_t LeftBegin = Begin;
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uint64_t LeftEnd = SplitPt - 1;
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uint64_t RightBegin = SplitPt;
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uint64_t RightEnd = End;
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// Remap this atom to become the lower of the two new ones.
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Parent->remap(this, LeftBegin, LeftEnd);
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// Create a new atom for the higher atom.
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MCAtom *RightAtom = Parent->createAtom(Type, RightBegin, RightEnd);
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// Split the contents of the original atom between it and the new one. The
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// precise method depends on whether this is a data or a text atom.
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if (isDataAtom()) {
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std::vector<MCData>::iterator I = Data.begin() + (RightBegin - LeftBegin);
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assert(I != Data.end() && "Split point not found in range!");
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std::copy(I, Data.end(), RightAtom->Data.end());
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Data.erase(I, Data.end());
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} else if (isTextAtom()) {
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std::vector<std::pair<uint64_t, MCInst> >::iterator I = Text.begin();
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while (I != Text.end() && I->first < SplitPt) ++I;
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assert(I != Text.end() && "Split point not found in disassembly!");
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assert(I->first == SplitPt &&
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"Split point does not fall on instruction boundary!");
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std::copy(I, Text.end(), RightAtom->Text.end());
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Text.erase(I, Text.end());
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} else
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llvm_unreachable("Unknown atom type!");
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return RightAtom;
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}
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void MCAtom::truncate(uint64_t TruncPt) {
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assert((TruncPt >= Begin && TruncPt < End) &&
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"Truncation point not contained in atom!");
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Parent->remap(this, Begin, TruncPt);
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if (isDataAtom()) {
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Data.resize(TruncPt - Begin + 1);
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} else if (isTextAtom()) {
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std::vector<std::pair<uint64_t, MCInst> >::iterator I = Text.begin();
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while (I != Text.end() && I->first <= TruncPt) ++I;
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assert(I != Text.end() && "Truncation point not found in disassembly!");
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assert(I->first == TruncPt+1 &&
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"Truncation point does not fall on instruction boundary");
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Text.erase(I, Text.end());
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} else
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llvm_unreachable("Unknown atom type!");
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}
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