forked from OSchip/llvm-project
Add comments to the CFI instructions and reformat with clang-format. No functionality change.
llvm-svn: 189864
This commit is contained in:
Bill Wendling
parent
3e6c93189b
commit
c12fcaed9a
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@ -23,400 +23,438 @@
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#include <vector>
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namespace llvm {
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class MCContext;
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class MCSection;
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class MCStreamer;
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class MCSymbol;
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class SourceMgr;
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class SMLoc;
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class MCContext;
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class MCSection;
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class MCStreamer;
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class MCSymbol;
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class SourceMgr;
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class SMLoc;
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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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/// 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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// 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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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&) LLVM_DELETED_FUNCTION;
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void operator=(const MCDwarfFile&) LLVM_DELETED_FUNCTION;
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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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MCDwarfFile(const MCDwarfFile &) LLVM_DELETED_FUNCTION;
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void operator=(const MCDwarfFile &) LLVM_DELETED_FUNCTION;
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/// getDirIndex - Get the dirIndex of this MCDwarfFile.
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unsigned getDirIndex() const { return DirIndex; }
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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 \p OS.
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void print(raw_ostream &OS) const;
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/// print - Print the value to the stream \p 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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/// dump - Print the value to stderr.
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void dump() const;
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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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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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/// 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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// Discriminator
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unsigned Discriminator;
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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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// Discriminator
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unsigned Discriminator;
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// Flag that indicates the initial value of the is_stmt_start flag.
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#define DWARF2_LINE_DEFAULT_IS_STMT 1
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#define DWARF2_LINE_DEFAULT_IS_STMT 1
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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_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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friend class MCLineEntry;
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MCDwarfLoc(unsigned fileNum, unsigned line, unsigned column, unsigned flags,
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unsigned isa, unsigned discriminator)
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private: // MCContext manages these
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friend class MCContext;
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friend class MCLineEntry;
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MCDwarfLoc(unsigned fileNum, unsigned line, unsigned column, unsigned flags,
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unsigned isa, unsigned discriminator)
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: FileNum(fileNum), Line(line), Column(column), Flags(flags), Isa(isa),
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Discriminator(discriminator) {}
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// Allow the default copy constructor and assignment operator to be used
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// for an MCDwarfLoc object.
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// Allow the default copy constructor and assignment operator to be used
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// for an MCDwarfLoc object.
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public:
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/// getFileNum - Get the FileNum of this MCDwarfLoc.
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unsigned getFileNum() const { return FileNum; }
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public:
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/// getFileNum - Get the FileNum of this MCDwarfLoc.
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unsigned getFileNum() const { return FileNum; }
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/// getLine - Get the Line of this MCDwarfLoc.
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unsigned getLine() const { return Line; }
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/// getLine - Get the Line of this MCDwarfLoc.
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unsigned getLine() const { return Line; }
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/// getColumn - Get the Column of this MCDwarfLoc.
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unsigned getColumn() const { return Column; }
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/// getColumn - Get the Column of this MCDwarfLoc.
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unsigned getColumn() const { return Column; }
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/// getFlags - Get the Flags of this MCDwarfLoc.
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unsigned getFlags() const { return Flags; }
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/// getFlags - Get the Flags of this MCDwarfLoc.
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unsigned getFlags() const { return Flags; }
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/// getIsa - Get the Isa of this MCDwarfLoc.
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unsigned getIsa() const { return Isa; }
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/// getIsa - Get the Isa of this MCDwarfLoc.
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unsigned getIsa() const { return Isa; }
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/// getDiscriminator - Get the Discriminator of this MCDwarfLoc.
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unsigned getDiscriminator() const { return Discriminator; }
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/// getDiscriminator - Get the Discriminator of this MCDwarfLoc.
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unsigned getDiscriminator() const { return Discriminator; }
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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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/// 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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/// 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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/// 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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/// 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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/// setIsa - Set the Isa of this MCDwarfLoc.
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void setIsa(unsigned isa) { Isa = isa; }
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/// setDiscriminator - Set the Discriminator of this MCDwarfLoc.
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void setDiscriminator(unsigned discriminator) {
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Discriminator = discriminator;
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}
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/// setDiscriminator - Set the Discriminator of this MCDwarfLoc.
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void setDiscriminator(unsigned discriminator) {
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Discriminator = discriminator;
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}
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};
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/// MCLineEntry - Instances of this class represent the line information for
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/// the dwarf line table entries. Which is created after a machine
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/// instruction is assembled and uses an address from a temporary label
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/// created at the current address in the current section and the info from
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/// the last .loc directive seen as stored in the context.
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class MCLineEntry : public MCDwarfLoc {
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MCSymbol *Label;
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private:
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// Allow the default copy constructor and assignment operator to be used
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// for an MCLineEntry object.
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public:
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// Constructor to create an MCLineEntry given a symbol and the dwarf loc.
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MCLineEntry(MCSymbol *label, const MCDwarfLoc loc)
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: MCDwarfLoc(loc), Label(label) {}
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MCSymbol *getLabel() const { return Label; }
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// This is called when an instruction is assembled into the specified
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// section and if there is information from the last .loc directive that
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// has yet to have a line entry made for it is made.
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static void Make(MCStreamer *MCOS, const MCSection *Section);
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};
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/// MCLineSection - Instances of this class represent the line information
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/// for a section where machine instructions have been assembled after seeing
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/// .loc directives. This is the information used to build the dwarf line
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/// table for a section.
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class MCLineSection {
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private:
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MCLineSection(const MCLineSection &) LLVM_DELETED_FUNCTION;
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void operator=(const MCLineSection &) LLVM_DELETED_FUNCTION;
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public:
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// Constructor to create an MCLineSection with an empty MCLineEntries
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// vector.
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MCLineSection() {}
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// addLineEntry - adds an entry to this MCLineSection's line entries
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void addLineEntry(const MCLineEntry &LineEntry, unsigned CUID) {
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MCLineDivisions[CUID].push_back(LineEntry);
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}
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typedef std::vector<MCLineEntry> MCLineEntryCollection;
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typedef MCLineEntryCollection::iterator iterator;
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typedef MCLineEntryCollection::const_iterator const_iterator;
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typedef std::map<unsigned, MCLineEntryCollection> MCLineDivisionMap;
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private:
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// A collection of MCLineEntry for each Compile Unit ID.
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MCLineDivisionMap MCLineDivisions;
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public:
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// Returns whether MCLineSection contains entries for a given Compile
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// Unit ID.
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bool containEntriesForID(unsigned CUID) const {
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return MCLineDivisions.count(CUID);
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}
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// Returns the collection of MCLineEntry for a given Compile Unit ID.
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const MCLineEntryCollection &getMCLineEntries(unsigned CUID) const {
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MCLineDivisionMap::const_iterator CIter = MCLineDivisions.find(CUID);
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assert(CIter != MCLineDivisions.end());
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return CIter->second;
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}
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};
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class MCDwarfFileTable {
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public:
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//
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// This emits the Dwarf file and the line tables for all Compile Units.
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//
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static const MCSymbol *Emit(MCStreamer *MCOS);
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//
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// This emits the Dwarf file and the line tables for a given Compile Unit.
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//
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static const MCSymbol *EmitCU(MCStreamer *MCOS, unsigned ID);
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};
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class MCDwarfLineAddr {
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public:
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/// Utility function to encode a Dwarf pair of LineDelta and AddrDeltas.
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static void Encode(MCContext &Context, int64_t LineDelta, uint64_t AddrDelta,
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raw_ostream &OS);
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/// Utility function to emit the encoding to a streamer.
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static void Emit(MCStreamer *MCOS, int64_t LineDelta, uint64_t AddrDelta);
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};
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class MCGenDwarfInfo {
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public:
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//
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// When generating dwarf for assembly source files this emits the Dwarf
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// sections.
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//
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static void Emit(MCStreamer *MCOS, const MCSymbol *LineSectionSymbol);
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};
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// When generating dwarf for assembly source files this is the info that is
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// needed to be gathered for each symbol that will have a dwarf label.
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class MCGenDwarfLabelEntry {
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private:
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// Name of the symbol without a leading underbar, if any.
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StringRef Name;
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// The dwarf file number this symbol is in.
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unsigned FileNumber;
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// The line number this symbol is at.
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unsigned LineNumber;
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// The low_pc for the dwarf label is taken from this symbol.
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MCSymbol *Label;
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public:
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MCGenDwarfLabelEntry(StringRef name, unsigned fileNumber, unsigned lineNumber,
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MCSymbol *label)
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: Name(name), FileNumber(fileNumber), LineNumber(lineNumber),
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Label(label) {}
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StringRef getName() const { return Name; }
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unsigned getFileNumber() const { return FileNumber; }
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unsigned getLineNumber() const { return LineNumber; }
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MCSymbol *getLabel() const { return Label; }
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// This is called when label is created when we are generating dwarf for
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// assembly source files.
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static void Make(MCSymbol *Symbol, MCStreamer *MCOS, SourceMgr &SrcMgr,
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SMLoc &Loc);
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};
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class MCCFIInstruction {
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public:
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enum OpType {
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OpSameValue,
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OpRememberState,
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OpRestoreState,
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OpOffset,
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OpDefCfaRegister,
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OpDefCfaOffset,
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OpDefCfa,
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OpRelOffset,
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OpAdjustCfaOffset,
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OpEscape,
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OpRestore,
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OpUndefined,
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OpRegister
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};
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/// MCLineEntry - Instances of this class represent the line information for
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/// the dwarf line table entries. Which is created after a machine
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/// instruction is assembled and uses an address from a temporary label
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/// created at the current address in the current section and the info from
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/// the last .loc directive seen as stored in the context.
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class MCLineEntry : public MCDwarfLoc {
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MCSymbol *Label;
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private:
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// Allow the default copy constructor and assignment operator to be used
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// for an MCLineEntry object.
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public:
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// Constructor to create an MCLineEntry given a symbol and the dwarf loc.
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MCLineEntry(MCSymbol *label, const MCDwarfLoc loc) : MCDwarfLoc(loc),
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Label(label) {}
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MCSymbol *getLabel() const { return Label; }
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// This is called when an instruction is assembled into the specified
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// section and if there is information from the last .loc directive that
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// has yet to have a line entry made for it is made.
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static void Make(MCStreamer *MCOS, const MCSection *Section);
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private:
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OpType Operation;
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MCSymbol *Label;
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unsigned Register;
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union {
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int Offset;
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unsigned Register2;
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};
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std::vector<char> Values;
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/// MCLineSection - Instances of this class represent the line information
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/// for a section where machine instructions have been assembled after seeing
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/// .loc directives. This is the information used to build the dwarf line
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/// table for a section.
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class MCLineSection {
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MCCFIInstruction(OpType Op, MCSymbol *L, unsigned R, int O, StringRef V)
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: Operation(Op), Label(L), Register(R), Offset(O),
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Values(V.begin(), V.end()) {
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assert(Op != OpRegister);
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}
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private:
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MCLineSection(const MCLineSection&) LLVM_DELETED_FUNCTION;
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void operator=(const MCLineSection&) LLVM_DELETED_FUNCTION;
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MCCFIInstruction(OpType Op, MCSymbol *L, unsigned R1, unsigned R2)
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: Operation(Op), Label(L), Register(R1), Register2(R2) {
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assert(Op == OpRegister);
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}
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public:
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// Constructor to create an MCLineSection with an empty MCLineEntries
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// vector.
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MCLineSection() {}
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public:
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/// \brief .cfi_def_cfa defines a rule for computing CFA as: take address from
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/// \param Register and add \param Offset to it.
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static MCCFIInstruction createDefCfa(MCSymbol *L, unsigned Register,
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int Offset) {
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return MCCFIInstruction(OpDefCfa, L, Register, -Offset, "");
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}
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// addLineEntry - adds an entry to this MCLineSection's line entries
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void addLineEntry(const MCLineEntry &LineEntry, unsigned CUID) {
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MCLineDivisions[CUID].push_back(LineEntry);
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}
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/// \brief .cfi_def_cfa_register modifies a rule for computing CFA. From now
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/// on \param Register will be used instead of the old one. Offset remains the
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/// same.
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static MCCFIInstruction createDefCfaRegister(MCSymbol *L, unsigned Register) {
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return MCCFIInstruction(OpDefCfaRegister, L, Register, 0, "");
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}
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typedef std::vector<MCLineEntry> MCLineEntryCollection;
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typedef MCLineEntryCollection::iterator iterator;
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typedef MCLineEntryCollection::const_iterator const_iterator;
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typedef std::map<unsigned, MCLineEntryCollection> MCLineDivisionMap;
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/// \brief .cfi_def_cfa_offset modifies a rule for computing CFA. Register
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/// remains the same, but offset is new. Note that it is the absolute offset
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/// that will be added to a defined register to the compute CFA address.
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static MCCFIInstruction createDefCfaOffset(MCSymbol *L, int Offset) {
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return MCCFIInstruction(OpDefCfaOffset, L, 0, -Offset, "");
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}
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private:
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// A collection of MCLineEntry for each Compile Unit ID.
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MCLineDivisionMap MCLineDivisions;
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/// \brief .cfi_adjust_cfa_offset Same as .cfi_def_cfa_offset, but \param
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/// Offset is a relative value that is added/subtracted from the previous
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/// offset.
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static MCCFIInstruction createAdjustCfaOffset(MCSymbol *L, int Adjustment) {
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return MCCFIInstruction(OpAdjustCfaOffset, L, 0, Adjustment, "");
|
||||
}
|
||||
|
||||
public:
|
||||
// Returns whether MCLineSection contains entries for a given Compile
|
||||
// Unit ID.
|
||||
bool containEntriesForID(unsigned CUID) const {
|
||||
return MCLineDivisions.count(CUID);
|
||||
}
|
||||
// Returns the collection of MCLineEntry for a given Compile Unit ID.
|
||||
const MCLineEntryCollection &getMCLineEntries(unsigned CUID) const {
|
||||
MCLineDivisionMap::const_iterator CIter = MCLineDivisions.find(CUID);
|
||||
assert(CIter != MCLineDivisions.end());
|
||||
return CIter->second;
|
||||
}
|
||||
};
|
||||
/// \brief .cfi_offset Previous value of \param Register is saved at offset
|
||||
/// \param Offset from CFA.
|
||||
static MCCFIInstruction createOffset(MCSymbol *L, unsigned Register,
|
||||
int Offset) {
|
||||
return MCCFIInstruction(OpOffset, L, Register, Offset, "");
|
||||
}
|
||||
|
||||
class MCDwarfFileTable {
|
||||
public:
|
||||
//
|
||||
// This emits the Dwarf file and the line tables for all Compile Units.
|
||||
//
|
||||
static const MCSymbol *Emit(MCStreamer *MCOS);
|
||||
//
|
||||
// This emits the Dwarf file and the line tables for a given Compile Unit.
|
||||
//
|
||||
static const MCSymbol *EmitCU(MCStreamer *MCOS, unsigned ID);
|
||||
};
|
||||
/// \brief .cfi_rel_offset Previous value of \param Register is saved at
|
||||
/// offset \param Offset from the current CFA register. This is transformed to
|
||||
/// .cfi_offset using the known displacement of the CFA register from the CFA.
|
||||
static MCCFIInstruction createRelOffset(MCSymbol *L, unsigned Register,
|
||||
int Offset) {
|
||||
return MCCFIInstruction(OpRelOffset, L, Register, Offset, "");
|
||||
}
|
||||
|
||||
class MCDwarfLineAddr {
|
||||
public:
|
||||
/// Utility function to encode a Dwarf pair of LineDelta and AddrDeltas.
|
||||
static void Encode(MCContext &Context, int64_t LineDelta,
|
||||
uint64_t AddrDelta, raw_ostream &OS);
|
||||
/// \brief .cfi_register Previous value of \param Register1 is saved in
|
||||
/// register \param Register2.
|
||||
static MCCFIInstruction createRegister(MCSymbol *L, unsigned Register1,
|
||||
unsigned Register2) {
|
||||
return MCCFIInstruction(OpRegister, L, Register1, Register2);
|
||||
}
|
||||
|
||||
/// Utility function to emit the encoding to a streamer.
|
||||
static void Emit(MCStreamer *MCOS,
|
||||
int64_t LineDelta,uint64_t AddrDelta);
|
||||
};
|
||||
/// \brief .cfi_restore says that the rule for \param Register is now the same
|
||||
/// as it was at the beginning of the function, after all initial instructions
|
||||
/// added by .cfi_startproc were executed.
|
||||
static MCCFIInstruction createRestore(MCSymbol *L, unsigned Register) {
|
||||
return MCCFIInstruction(OpRestore, L, Register, 0, "");
|
||||
}
|
||||
|
||||
class MCGenDwarfInfo {
|
||||
public:
|
||||
//
|
||||
// When generating dwarf for assembly source files this emits the Dwarf
|
||||
// sections.
|
||||
//
|
||||
static void Emit(MCStreamer *MCOS, const MCSymbol *LineSectionSymbol);
|
||||
};
|
||||
/// \brief .cfi_undefined From now on the previous value of \param Register
|
||||
/// can't be restored anymore.
|
||||
static MCCFIInstruction createUndefined(MCSymbol *L, unsigned Register) {
|
||||
return MCCFIInstruction(OpUndefined, L, Register, 0, "");
|
||||
}
|
||||
|
||||
// When generating dwarf for assembly source files this is the info that is
|
||||
// needed to be gathered for each symbol that will have a dwarf label.
|
||||
class MCGenDwarfLabelEntry {
|
||||
private:
|
||||
// Name of the symbol without a leading underbar, if any.
|
||||
StringRef Name;
|
||||
// The dwarf file number this symbol is in.
|
||||
unsigned FileNumber;
|
||||
// The line number this symbol is at.
|
||||
unsigned LineNumber;
|
||||
// The low_pc for the dwarf label is taken from this symbol.
|
||||
MCSymbol *Label;
|
||||
/// \brief .cfi_same_value Current value of \param Register is the same as
|
||||
/// in the previous frame. I.e., no restoration is needed.
|
||||
static MCCFIInstruction createSameValue(MCSymbol *L, unsigned Register) {
|
||||
return MCCFIInstruction(OpSameValue, L, Register, 0, "");
|
||||
}
|
||||
|
||||
public:
|
||||
MCGenDwarfLabelEntry(StringRef name, unsigned fileNumber,
|
||||
unsigned lineNumber, MCSymbol *label) :
|
||||
Name(name), FileNumber(fileNumber), LineNumber(lineNumber), Label(label){}
|
||||
/// \brief .cfi_remember_state Save all current rules for all registers.
|
||||
static MCCFIInstruction createRememberState(MCSymbol *L) {
|
||||
return MCCFIInstruction(OpRememberState, L, 0, 0, "");
|
||||
}
|
||||
|
||||
StringRef getName() const { return Name; }
|
||||
unsigned getFileNumber() const { return FileNumber; }
|
||||
unsigned getLineNumber() const { return LineNumber; }
|
||||
MCSymbol *getLabel() const { return Label; }
|
||||
/// \brief .cfi_restore_state Restore the previously saved state.
|
||||
static MCCFIInstruction createRestoreState(MCSymbol *L) {
|
||||
return MCCFIInstruction(OpRestoreState, L, 0, 0, "");
|
||||
}
|
||||
|
||||
// This is called when label is created when we are generating dwarf for
|
||||
// assembly source files.
|
||||
static void Make(MCSymbol *Symbol, MCStreamer *MCOS, SourceMgr &SrcMgr,
|
||||
SMLoc &Loc);
|
||||
};
|
||||
/// \brief .cfi_escape Allows the user to add arbitrary bytes to the unwind
|
||||
/// info.
|
||||
static MCCFIInstruction createEscape(MCSymbol *L, StringRef Vals) {
|
||||
return MCCFIInstruction(OpEscape, L, 0, 0, Vals);
|
||||
}
|
||||
|
||||
class MCCFIInstruction {
|
||||
public:
|
||||
enum OpType { OpSameValue, OpRememberState, OpRestoreState, OpOffset,
|
||||
OpDefCfaRegister, OpDefCfaOffset, OpDefCfa, OpRelOffset,
|
||||
OpAdjustCfaOffset, OpEscape, OpRestore, OpUndefined,
|
||||
OpRegister };
|
||||
private:
|
||||
OpType Operation;
|
||||
MCSymbol *Label;
|
||||
unsigned Register;
|
||||
union {
|
||||
int Offset;
|
||||
unsigned Register2;
|
||||
};
|
||||
std::vector<char> Values;
|
||||
OpType getOperation() const { return Operation; }
|
||||
MCSymbol *getLabel() const { return Label; }
|
||||
|
||||
MCCFIInstruction(OpType Op, MCSymbol *L, unsigned R, int O, StringRef V) :
|
||||
Operation(Op), Label(L), Register(R), Offset(O),
|
||||
Values(V.begin(), V.end()) {
|
||||
assert(Op != OpRegister);
|
||||
}
|
||||
unsigned getRegister() const {
|
||||
assert(Operation == OpDefCfa || Operation == OpOffset ||
|
||||
Operation == OpRestore || Operation == OpUndefined ||
|
||||
Operation == OpSameValue || Operation == OpDefCfaRegister ||
|
||||
Operation == OpRelOffset || Operation == OpRegister);
|
||||
return Register;
|
||||
}
|
||||
|
||||
MCCFIInstruction(OpType Op, MCSymbol *L, unsigned R1, unsigned R2) :
|
||||
Operation(Op), Label(L), Register(R1), Register2(R2) {
|
||||
assert(Op == OpRegister);
|
||||
}
|
||||
unsigned getRegister2() const {
|
||||
assert(Operation == OpRegister);
|
||||
return Register2;
|
||||
}
|
||||
|
||||
public:
|
||||
static MCCFIInstruction
|
||||
createOffset(MCSymbol *L, unsigned Register, int Offset) {
|
||||
return MCCFIInstruction(OpOffset, L, Register, Offset, "");
|
||||
}
|
||||
int getOffset() const {
|
||||
assert(Operation == OpDefCfa || Operation == OpOffset ||
|
||||
Operation == OpRelOffset || Operation == OpDefCfaOffset ||
|
||||
Operation == OpAdjustCfaOffset);
|
||||
return Offset;
|
||||
}
|
||||
|
||||
static MCCFIInstruction
|
||||
createDefCfaRegister(MCSymbol *L, unsigned Register) {
|
||||
return MCCFIInstruction(OpDefCfaRegister, L, Register, 0, "");
|
||||
}
|
||||
const StringRef getValues() const {
|
||||
assert(Operation == OpEscape);
|
||||
return StringRef(&Values[0], Values.size());
|
||||
}
|
||||
};
|
||||
|
||||
static MCCFIInstruction createDefCfaOffset(MCSymbol *L, int Offset) {
|
||||
return MCCFIInstruction(OpDefCfaOffset, L, 0, -Offset, "");
|
||||
}
|
||||
struct MCDwarfFrameInfo {
|
||||
MCDwarfFrameInfo()
|
||||
: Begin(0), End(0), Personality(0), Lsda(0), Function(0), Instructions(),
|
||||
PersonalityEncoding(), LsdaEncoding(0), CompactUnwindEncoding(0),
|
||||
IsSignalFrame(false) {}
|
||||
MCSymbol *Begin;
|
||||
MCSymbol *End;
|
||||
const MCSymbol *Personality;
|
||||
const MCSymbol *Lsda;
|
||||
const MCSymbol *Function;
|
||||
std::vector<MCCFIInstruction> Instructions;
|
||||
unsigned PersonalityEncoding;
|
||||
unsigned LsdaEncoding;
|
||||
uint32_t CompactUnwindEncoding;
|
||||
bool IsSignalFrame;
|
||||
};
|
||||
|
||||
static MCCFIInstruction
|
||||
createDefCfa(MCSymbol *L, unsigned Register, int Offset) {
|
||||
return MCCFIInstruction(OpDefCfa, L, Register, -Offset, "");
|
||||
}
|
||||
|
||||
static MCCFIInstruction createUndefined(MCSymbol *L, unsigned Register) {
|
||||
return MCCFIInstruction(OpUndefined, L, Register, 0, "");
|
||||
}
|
||||
|
||||
static MCCFIInstruction createRestore(MCSymbol *L, unsigned Register) {
|
||||
return MCCFIInstruction(OpRestore, L, Register, 0, "");
|
||||
}
|
||||
|
||||
static MCCFIInstruction createSameValue(MCSymbol *L, unsigned Register) {
|
||||
return MCCFIInstruction(OpSameValue, L, Register, 0, "");
|
||||
}
|
||||
|
||||
static MCCFIInstruction createRestoreState(MCSymbol *L) {
|
||||
return MCCFIInstruction(OpRestoreState, L, 0, 0, "");
|
||||
}
|
||||
|
||||
static MCCFIInstruction createRememberState(MCSymbol *L) {
|
||||
return MCCFIInstruction(OpRememberState, L, 0, 0, "");
|
||||
}
|
||||
|
||||
static MCCFIInstruction
|
||||
createRelOffset(MCSymbol *L, unsigned Register, int Offset) {
|
||||
return MCCFIInstruction(OpRelOffset, L, Register, Offset, "");
|
||||
}
|
||||
|
||||
static MCCFIInstruction
|
||||
createAdjustCfaOffset(MCSymbol *L, int Adjustment) {
|
||||
return MCCFIInstruction(OpAdjustCfaOffset, L, 0, Adjustment, "");
|
||||
}
|
||||
|
||||
static MCCFIInstruction createEscape(MCSymbol *L, StringRef Vals) {
|
||||
return MCCFIInstruction(OpEscape, L, 0, 0, Vals);
|
||||
}
|
||||
|
||||
static MCCFIInstruction
|
||||
createRegister(MCSymbol *L, unsigned Register1, unsigned Register2) {
|
||||
return MCCFIInstruction(OpRegister, L, Register1, Register2);
|
||||
}
|
||||
|
||||
OpType getOperation() const { return Operation; }
|
||||
MCSymbol *getLabel() const { return Label; }
|
||||
|
||||
unsigned getRegister() const {
|
||||
assert(Operation == OpDefCfa || Operation == OpOffset ||
|
||||
Operation == OpRestore || Operation == OpUndefined ||
|
||||
Operation == OpSameValue || Operation == OpDefCfaRegister ||
|
||||
Operation == OpRelOffset || Operation == OpRegister);
|
||||
return Register;
|
||||
}
|
||||
|
||||
unsigned getRegister2() const {
|
||||
assert(Operation == OpRegister);
|
||||
return Register2;
|
||||
}
|
||||
|
||||
int getOffset() const {
|
||||
assert(Operation == OpDefCfa || Operation == OpOffset ||
|
||||
Operation == OpRelOffset || Operation == OpDefCfaOffset ||
|
||||
Operation == OpAdjustCfaOffset);
|
||||
return Offset;
|
||||
}
|
||||
|
||||
const StringRef getValues() const {
|
||||
assert(Operation == OpEscape);
|
||||
return StringRef(&Values[0], Values.size());
|
||||
}
|
||||
};
|
||||
|
||||
struct MCDwarfFrameInfo {
|
||||
MCDwarfFrameInfo() : Begin(0), End(0), Personality(0), Lsda(0),
|
||||
Function(0), Instructions(), PersonalityEncoding(),
|
||||
LsdaEncoding(0), CompactUnwindEncoding(0),
|
||||
IsSignalFrame(false) {}
|
||||
MCSymbol *Begin;
|
||||
MCSymbol *End;
|
||||
const MCSymbol *Personality;
|
||||
const MCSymbol *Lsda;
|
||||
const MCSymbol *Function;
|
||||
std::vector<MCCFIInstruction> Instructions;
|
||||
unsigned PersonalityEncoding;
|
||||
unsigned LsdaEncoding;
|
||||
uint32_t CompactUnwindEncoding;
|
||||
bool IsSignalFrame;
|
||||
};
|
||||
|
||||
class MCDwarfFrameEmitter {
|
||||
public:
|
||||
//
|
||||
// This emits the frame info section.
|
||||
//
|
||||
static void Emit(MCStreamer &streamer, bool usingCFI,
|
||||
bool isEH);
|
||||
static void EmitAdvanceLoc(MCStreamer &Streamer, uint64_t AddrDelta);
|
||||
static void EncodeAdvanceLoc(MCContext &Context, uint64_t AddrDelta,
|
||||
raw_ostream &OS);
|
||||
};
|
||||
class MCDwarfFrameEmitter {
|
||||
public:
|
||||
//
|
||||
// This emits the frame info section.
|
||||
//
|
||||
static void Emit(MCStreamer &streamer, bool usingCFI, bool isEH);
|
||||
static void EmitAdvanceLoc(MCStreamer &Streamer, uint64_t AddrDelta);
|
||||
static void EncodeAdvanceLoc(MCContext &Context, uint64_t AddrDelta,
|
||||
raw_ostream &OS);
|
||||
};
|
||||
} // end namespace llvm
|
||||
|
||||
#endif
|
||||
|
|
|
|||
Loading…
Reference in New Issue