mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2026-04-21 23:17:16 +00:00
Split out the Dwarf writer stuff into separate files. This is a much more
logical/sane approach to organizing all of the stuff that goes into writing out DWARF information. Honestly? even this is too complex for what it's supposed to be doing. Trivia: It *looks* like there would be functionality changes, however there aren't! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71821 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling
@@ -0,0 +1,235 @@
|
||||
//===--- lib/CodeGen/DwarfPrinter.cpp - Dwarf Printer ---------------------===//
|
||||
//
|
||||
// The LLVM Compiler Infrastructure
|
||||
//
|
||||
// This file is distributed under the University of Illinois Open Source
|
||||
// License. See LICENSE.TXT for details.
|
||||
//
|
||||
//===----------------------------------------------------------------------===//
|
||||
//
|
||||
// Emit general DWARF directives.
|
||||
//
|
||||
//===----------------------------------------------------------------------===//
|
||||
|
||||
#include "DwarfPrinter.h"
|
||||
#include "llvm/Module.h"
|
||||
#include "llvm/CodeGen/AsmPrinter.h"
|
||||
#include "llvm/CodeGen/MachineFrameInfo.h"
|
||||
#include "llvm/CodeGen/MachineModuleInfo.h"
|
||||
#include "llvm/Support/Dwarf.h"
|
||||
#include "llvm/Target/TargetAsmInfo.h"
|
||||
#include "llvm/Target/TargetData.h"
|
||||
#include "llvm/Target/TargetFrameInfo.h"
|
||||
#include "llvm/Target/TargetRegisterInfo.h"
|
||||
#include <ostream>
|
||||
|
||||
using namespace llvm;
|
||||
|
||||
Dwarf::Dwarf(raw_ostream &OS, AsmPrinter *A, const TargetAsmInfo *T,
|
||||
const char *flavor)
|
||||
: O(OS), Asm(A), TAI(T), TD(Asm->TM.getTargetData()),
|
||||
RI(Asm->TM.getRegisterInfo()), M(NULL), MF(NULL), MMI(NULL),
|
||||
SubprogramCount(0), Flavor(flavor), SetCounter(1) {}
|
||||
|
||||
void Dwarf::PrintRelDirective(bool Force32Bit, bool isInSection) const {
|
||||
if (isInSection && TAI->getDwarfSectionOffsetDirective())
|
||||
O << TAI->getDwarfSectionOffsetDirective();
|
||||
else if (Force32Bit || TD->getPointerSize() == sizeof(int32_t))
|
||||
O << TAI->getData32bitsDirective();
|
||||
else
|
||||
O << TAI->getData64bitsDirective();
|
||||
}
|
||||
|
||||
/// PrintLabelName - Print label name in form used by Dwarf writer.
|
||||
///
|
||||
void Dwarf::PrintLabelName(const char *Tag, unsigned Number) const {
|
||||
O << TAI->getPrivateGlobalPrefix() << Tag;
|
||||
if (Number) O << Number;
|
||||
}
|
||||
void Dwarf::PrintLabelName(const char *Tag, unsigned Number,
|
||||
const char *Suffix) const {
|
||||
O << TAI->getPrivateGlobalPrefix() << Tag;
|
||||
if (Number) O << Number;
|
||||
O << Suffix;
|
||||
}
|
||||
|
||||
/// EmitLabel - Emit location label for internal use by Dwarf.
|
||||
///
|
||||
void Dwarf::EmitLabel(const char *Tag, unsigned Number) const {
|
||||
PrintLabelName(Tag, Number);
|
||||
O << ":\n";
|
||||
}
|
||||
|
||||
/// EmitReference - Emit a reference to a label.
|
||||
///
|
||||
void Dwarf::EmitReference(const char *Tag, unsigned Number,
|
||||
bool IsPCRelative, bool Force32Bit) const {
|
||||
PrintRelDirective(Force32Bit);
|
||||
PrintLabelName(Tag, Number);
|
||||
if (IsPCRelative) O << "-" << TAI->getPCSymbol();
|
||||
}
|
||||
void Dwarf::EmitReference(const std::string &Name, bool IsPCRelative,
|
||||
bool Force32Bit) const {
|
||||
PrintRelDirective(Force32Bit);
|
||||
O << Name;
|
||||
if (IsPCRelative) O << "-" << TAI->getPCSymbol();
|
||||
}
|
||||
|
||||
/// EmitDifference - Emit the difference between two labels. Some assemblers do
|
||||
/// not behave with absolute expressions with data directives, so there is an
|
||||
/// option (needsSet) to use an intermediary set expression.
|
||||
void Dwarf::EmitDifference(const char *TagHi, unsigned NumberHi,
|
||||
const char *TagLo, unsigned NumberLo,
|
||||
bool IsSmall) {
|
||||
if (TAI->needsSet()) {
|
||||
O << "\t.set\t";
|
||||
PrintLabelName("set", SetCounter, Flavor);
|
||||
O << ",";
|
||||
PrintLabelName(TagHi, NumberHi);
|
||||
O << "-";
|
||||
PrintLabelName(TagLo, NumberLo);
|
||||
O << "\n";
|
||||
|
||||
PrintRelDirective(IsSmall);
|
||||
PrintLabelName("set", SetCounter, Flavor);
|
||||
++SetCounter;
|
||||
} else {
|
||||
PrintRelDirective(IsSmall);
|
||||
PrintLabelName(TagHi, NumberHi);
|
||||
O << "-";
|
||||
PrintLabelName(TagLo, NumberLo);
|
||||
}
|
||||
}
|
||||
|
||||
void Dwarf::EmitSectionOffset(const char* Label, const char* Section,
|
||||
unsigned LabelNumber, unsigned SectionNumber,
|
||||
bool IsSmall, bool isEH,
|
||||
bool useSet) {
|
||||
bool printAbsolute = false;
|
||||
if (isEH)
|
||||
printAbsolute = TAI->isAbsoluteEHSectionOffsets();
|
||||
else
|
||||
printAbsolute = TAI->isAbsoluteDebugSectionOffsets();
|
||||
|
||||
if (TAI->needsSet() && useSet) {
|
||||
O << "\t.set\t";
|
||||
PrintLabelName("set", SetCounter, Flavor);
|
||||
O << ",";
|
||||
PrintLabelName(Label, LabelNumber);
|
||||
|
||||
if (!printAbsolute) {
|
||||
O << "-";
|
||||
PrintLabelName(Section, SectionNumber);
|
||||
}
|
||||
|
||||
O << "\n";
|
||||
PrintRelDirective(IsSmall);
|
||||
PrintLabelName("set", SetCounter, Flavor);
|
||||
++SetCounter;
|
||||
} else {
|
||||
PrintRelDirective(IsSmall, true);
|
||||
PrintLabelName(Label, LabelNumber);
|
||||
|
||||
if (!printAbsolute) {
|
||||
O << "-";
|
||||
PrintLabelName(Section, SectionNumber);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// EmitFrameMoves - Emit frame instructions to describe the layout of the
|
||||
/// frame.
|
||||
void Dwarf::EmitFrameMoves(const char *BaseLabel, unsigned BaseLabelID,
|
||||
const std::vector<MachineMove> &Moves, bool isEH) {
|
||||
int stackGrowth =
|
||||
Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
|
||||
TargetFrameInfo::StackGrowsUp ?
|
||||
TD->getPointerSize() : -TD->getPointerSize();
|
||||
bool IsLocal = BaseLabel && strcmp(BaseLabel, "label") == 0;
|
||||
|
||||
for (unsigned i = 0, N = Moves.size(); i < N; ++i) {
|
||||
const MachineMove &Move = Moves[i];
|
||||
unsigned LabelID = Move.getLabelID();
|
||||
|
||||
if (LabelID) {
|
||||
LabelID = MMI->MappedLabel(LabelID);
|
||||
|
||||
// Throw out move if the label is invalid.
|
||||
if (!LabelID) continue;
|
||||
}
|
||||
|
||||
const MachineLocation &Dst = Move.getDestination();
|
||||
const MachineLocation &Src = Move.getSource();
|
||||
|
||||
// Advance row if new location.
|
||||
if (BaseLabel && LabelID && (BaseLabelID != LabelID || !IsLocal)) {
|
||||
Asm->EmitInt8(dwarf::DW_CFA_advance_loc4);
|
||||
Asm->EOL("DW_CFA_advance_loc4");
|
||||
EmitDifference("label", LabelID, BaseLabel, BaseLabelID, true);
|
||||
Asm->EOL();
|
||||
|
||||
BaseLabelID = LabelID;
|
||||
BaseLabel = "label";
|
||||
IsLocal = true;
|
||||
}
|
||||
|
||||
// If advancing cfa.
|
||||
if (Dst.isReg() && Dst.getReg() == MachineLocation::VirtualFP) {
|
||||
if (!Src.isReg()) {
|
||||
if (Src.getReg() == MachineLocation::VirtualFP) {
|
||||
Asm->EmitInt8(dwarf::DW_CFA_def_cfa_offset);
|
||||
Asm->EOL("DW_CFA_def_cfa_offset");
|
||||
} else {
|
||||
Asm->EmitInt8(dwarf::DW_CFA_def_cfa);
|
||||
Asm->EOL("DW_CFA_def_cfa");
|
||||
Asm->EmitULEB128Bytes(RI->getDwarfRegNum(Src.getReg(), isEH));
|
||||
Asm->EOL("Register");
|
||||
}
|
||||
|
||||
int Offset = -Src.getOffset();
|
||||
|
||||
Asm->EmitULEB128Bytes(Offset);
|
||||
Asm->EOL("Offset");
|
||||
} else {
|
||||
assert(0 && "Machine move no supported yet.");
|
||||
}
|
||||
} else if (Src.isReg() &&
|
||||
Src.getReg() == MachineLocation::VirtualFP) {
|
||||
if (Dst.isReg()) {
|
||||
Asm->EmitInt8(dwarf::DW_CFA_def_cfa_register);
|
||||
Asm->EOL("DW_CFA_def_cfa_register");
|
||||
Asm->EmitULEB128Bytes(RI->getDwarfRegNum(Dst.getReg(), isEH));
|
||||
Asm->EOL("Register");
|
||||
} else {
|
||||
assert(0 && "Machine move no supported yet.");
|
||||
}
|
||||
} else {
|
||||
unsigned Reg = RI->getDwarfRegNum(Src.getReg(), isEH);
|
||||
int Offset = Dst.getOffset() / stackGrowth;
|
||||
|
||||
if (Offset < 0) {
|
||||
Asm->EmitInt8(dwarf::DW_CFA_offset_extended_sf);
|
||||
Asm->EOL("DW_CFA_offset_extended_sf");
|
||||
Asm->EmitULEB128Bytes(Reg);
|
||||
Asm->EOL("Reg");
|
||||
Asm->EmitSLEB128Bytes(Offset);
|
||||
Asm->EOL("Offset");
|
||||
} else if (Reg < 64) {
|
||||
Asm->EmitInt8(dwarf::DW_CFA_offset + Reg);
|
||||
if (Asm->isVerbose())
|
||||
Asm->EOL("DW_CFA_offset + Reg (" + utostr(Reg) + ")");
|
||||
else
|
||||
Asm->EOL();
|
||||
Asm->EmitULEB128Bytes(Offset);
|
||||
Asm->EOL("Offset");
|
||||
} else {
|
||||
Asm->EmitInt8(dwarf::DW_CFA_offset_extended);
|
||||
Asm->EOL("DW_CFA_offset_extended");
|
||||
Asm->EmitULEB128Bytes(Reg);
|
||||
Asm->EOL("Reg");
|
||||
Asm->EmitULEB128Bytes(Offset);
|
||||
Asm->EOL("Offset");
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user