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//===-- PIC16DebugInfo.cpp - Implementation for PIC16 Debug Information ======//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the helper functions for representing debug information.
//
//===----------------------------------------------------------------------===//
#include "PIC16.h"
#include "PIC16DebugInfo.h"
#include "llvm/GlobalVariable.h"
using namespace llvm;
void PIC16DbgInfo::PopulateDebugInfo(DIType Ty, unsigned short &TypeNo,
bool &HasAux, int Aux[],
std::string &TypeName) {
if (Ty.isBasicType(Ty.getTag())) {
std::string Name = "";
Ty.getName(Name);
unsigned short BaseTy = GetTypeDebugNumber(Name);
TypeNo = TypeNo << PIC16Dbg::S_BASIC;
TypeNo = TypeNo | (0xffff & BaseTy);
}
else if (Ty.isDerivedType(Ty.getTag())) {
switch(Ty.getTag())
{
case dwarf::DW_TAG_pointer_type:
TypeNo = TypeNo << PIC16Dbg::S_DERIVED;
TypeNo = TypeNo | PIC16Dbg::DT_PTR;
break;
default:
TypeNo = TypeNo << PIC16Dbg::S_DERIVED;
}
DIType BaseType = DIDerivedType(Ty.getGV()).getTypeDerivedFrom();
PopulateDebugInfo(BaseType, TypeNo, HasAux, Aux, TypeName);
}
else if (Ty.isCompositeType(Ty.getTag())) {
switch (Ty.getTag()) {
case dwarf::DW_TAG_array_type: {
DICompositeType CTy = DICompositeType(Ty.getGV());
DIArray Elements = CTy.getTypeArray();
unsigned short size = 1;
unsigned short Dimension[4]={0,0,0,0};
for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
DIDescriptor Element = Elements.getElement(i);
if (Element.getTag() == dwarf::DW_TAG_subrange_type) {
TypeNo = TypeNo << PIC16Dbg::S_DERIVED;
TypeNo = TypeNo | PIC16Dbg::DT_ARY;
DISubrange SubRange = DISubrange(Element.getGV());
Dimension[i] = SubRange.getHi() - SubRange.getLo() + 1;
// Each dimension is represented by 2 bytes starting at byte 9.
Aux[8+i*2+0] = Dimension[i];
Aux[8+i*2+1] = Dimension[i] >> 8;
size = size * Dimension[i];
}
}
HasAux = true;
// In auxillary entry for array, 7th and 8th byte represent array size.
Aux[6] = size;
Aux[7] = size >> 8;
DIType BaseType = CTy.getTypeDerivedFrom();
PopulateDebugInfo(BaseType, TypeNo, HasAux, Aux, TypeName);
break;
}
case dwarf:: DW_TAG_union_type:
case dwarf::DW_TAG_structure_type: {
DICompositeType CTy = DICompositeType(Ty.getGV());
TypeNo = TypeNo << PIC16Dbg::S_BASIC;
if (Ty.getTag() == dwarf::DW_TAG_structure_type)
TypeNo = TypeNo | PIC16Dbg::T_STRUCT;
else
TypeNo = TypeNo | PIC16Dbg::T_UNION;
CTy.getName(TypeName);
unsigned size = CTy.getSizeInBits()/8;
// 7th and 8th byte represent size.
HasAux = true;
Aux[6] = size;
Aux[7] = size >> 8;
break;
}
case dwarf::DW_TAG_enumeration_type: {
TypeNo = TypeNo << PIC16Dbg::S_BASIC;
TypeNo = TypeNo | PIC16Dbg::T_ENUM;
break;
}
default:
TypeNo = TypeNo << PIC16Dbg::S_DERIVED;
}
}
else {
TypeNo = PIC16Dbg::T_NULL;
HasAux = false;
}
return;
}
unsigned PIC16DbgInfo::GetTypeDebugNumber(std::string &type) {
if (type == "char")
return PIC16Dbg::T_CHAR;
else if (type == "short")
return PIC16Dbg::T_SHORT;
else if (type == "int")
return PIC16Dbg::T_INT;
else if (type == "long")
return PIC16Dbg::T_LONG;
else if (type == "unsigned char")
return PIC16Dbg::T_UCHAR;
else if (type == "unsigned short")
return PIC16Dbg::T_USHORT;
else if (type == "unsigned int")
return PIC16Dbg::T_UINT;
else if (type == "unsigned long")
return PIC16Dbg::T_ULONG;
else
return 0;
}
short PIC16DbgInfo::getClass(DIGlobalVariable DIGV) {
short ClassNo;
if (PAN::isLocalName(DIGV.getGlobal()->getName())) {
// Generating C_AUTO here fails due to error in linker. Change it once
// linker is fixed.
ClassNo = PIC16Dbg::C_STAT;
}
else if (DIGV.isLocalToUnit())
ClassNo = PIC16Dbg::C_STAT;
else
ClassNo = PIC16Dbg::C_EXT;
return ClassNo;
}
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