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c1840b3da2
needed parsing for the .loc directive and saves the current info from that into the context. The next patch will take the current loc info after an instruction is assembled and save that info into a vector for each section for use to build the line number tables. The patch after that will encode the info from those vectors into the output file as the dwarf line tables. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111956 91177308-0d34-0410-b5e6-96231b3b80d8
111 lines
3.6 KiB
C++
111 lines
3.6 KiB
C++
//===- MCDwarf.h - Machine Code Dwarf support -------------------*- C++ -*-===//
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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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//
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// This file contains the declaration of the MCDwarfFile to support the dwarf
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// .file directive.
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// TODO: add the support needed for the .loc directive.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_MC_MCDWARF_H
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#define LLVM_MC_MCDWARF_H
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#include "llvm/ADT/StringRef.h"
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namespace llvm {
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class MCContext;
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class raw_ostream;
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/// MCDwarfFile - Instances of this class represent the name of the dwarf
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/// .file directive and its associated dwarf file number in the MC file,
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/// and MCDwarfFile's are created and unique'd by the MCContext class where
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/// the file number for each is its index into the vector of DwarfFiles (note
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/// index 0 is not used and not a valid dwarf file number).
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class MCDwarfFile {
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// Name - the base name of the file without its directory path.
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// The StringRef references memory allocated in the MCContext.
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StringRef Name;
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// DirIndex - the index into the list of directory names for this file name.
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unsigned DirIndex;
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private: // MCContext creates and uniques these.
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friend class MCContext;
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MCDwarfFile(StringRef name, unsigned dirIndex)
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: Name(name), DirIndex(dirIndex) {}
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MCDwarfFile(const MCDwarfFile&); // DO NOT IMPLEMENT
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void operator=(const MCDwarfFile&); // DO NOT IMPLEMENT
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public:
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/// getName - Get the base name of this MCDwarfFile.
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StringRef getName() const { return Name; }
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/// getDirIndex - Get the dirIndex of this MCDwarfFile.
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unsigned getDirIndex() const { return DirIndex; }
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/// print - Print the value to the stream \arg OS.
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void print(raw_ostream &OS) const;
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/// dump - Print the value to stderr.
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void dump() const;
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};
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/// MCDwarfLoc - Instances of this class represent the information from a
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/// dwarf .loc directive.
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class MCDwarfLoc {
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// FileNum - the file number.
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unsigned FileNum;
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// Line - the line number.
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unsigned Line;
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// Column - the column position.
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unsigned Column;
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// Flags (see #define's below)
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unsigned Flags;
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// Isa
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unsigned Isa;
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#define DWARF2_FLAG_IS_STMT (1 << 0)
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#define DWARF2_FLAG_BASIC_BLOCK (1 << 1)
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#define DWARF2_FLAG_PROLOGUE_END (1 << 2)
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#define DWARF2_FLAG_EPILOGUE_BEGIN (1 << 3)
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private: // MCContext manages these
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friend class MCContext;
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MCDwarfLoc(unsigned fileNum, unsigned line, unsigned column, unsigned flags,
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unsigned isa)
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: FileNum(fileNum), Line(line), Column(column), Flags(flags), Isa(isa) {}
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MCDwarfLoc(const MCDwarfLoc&); // DO NOT IMPLEMENT
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void operator=(const MCDwarfLoc&); // DO NOT IMPLEMENT
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public:
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/// setFileNum - Set the FileNum of this MCDwarfLoc.
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void setFileNum(unsigned fileNum) { FileNum = fileNum; }
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/// setLine - Set the Line of this MCDwarfLoc.
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void setLine(unsigned line) { Line = line; }
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/// setColumn - Set the Column of this MCDwarfLoc.
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void setColumn(unsigned column) { Column = column; }
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/// setFlags - Set the Flags of this MCDwarfLoc.
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void setFlags(unsigned flags) { Flags = flags; }
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/// setIsa - Set the Isa of this MCDwarfLoc.
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void setIsa(unsigned isa) { Isa = isa; }
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};
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inline raw_ostream &operator<<(raw_ostream &OS, const MCDwarfFile &DwarfFile){
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DwarfFile.print(OS);
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return OS;
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}
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} // end namespace llvm
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#endif
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