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|
// Convert DMD CodeView/DWARF debug information to PDB files
// Copyright (c) 2009-2012 by Rainer Schuetze, All Rights Reserved
//
// License for redistribution is given by the Artistic License 2.0
// see file LICENSE for further details
//
// todo:
// display associative array
// 64 bit:
// - arguments passed by register
// - real
#include "cv2pdb.h"
#include "PEImage.h"
#include "symutil.h"
#include "cvutil.h"
#include "dwarf.h"
#include <assert.h>
#include <string>
#include <vector>
void CV2PDB::checkDWARFTypeAlloc(int size, int add)
{
if (cbDwarfTypes + size > allocDwarfTypes)
{
//allocDwarfTypes += size + add;
allocDwarfTypes += allocDwarfTypes/2 + size + add;
dwarfTypes = (BYTE*) realloc(dwarfTypes, allocDwarfTypes);
if (dwarfTypes == nullptr)
__debugbreak();
}
}
enum CV_X86_REG
{
CV_REG_NONE = 0,
CV_REG_EAX = 17,
CV_REG_ECX = 18,
CV_REG_EDX = 19,
CV_REG_EBX = 20,
CV_REG_ESP = 21,
CV_REG_EBP = 22,
CV_REG_ESI = 23,
CV_REG_EDI = 24,
CV_REG_ES = 25,
CV_REG_CS = 26,
CV_REG_SS = 27,
CV_REG_DS = 28,
CV_REG_FS = 29,
CV_REG_GS = 30,
CV_REG_IP = 31,
CV_REG_FLAGS = 32,
CV_REG_EIP = 33,
CV_REG_EFLAGS = 34,
CV_REG_ST0 = 128, /* this includes ST1 to ST7 */
CV_REG_XMM0 = 154, /* this includes XMM1 to XMM7 */
CV_REG_XMM8 = 252, /* this includes XMM9 to XMM15 */
// 64-bit regular registers
CV_AMD64_RAX = 328,
CV_AMD64_RBX = 329,
CV_AMD64_RCX = 330,
CV_AMD64_RDX = 331,
CV_AMD64_RSI = 332,
CV_AMD64_RDI = 333,
CV_AMD64_RBP = 334,
CV_AMD64_RSP = 335,
// 64-bit integer registers with 8-, 16-, and 32-bit forms (B, W, and D)
CV_AMD64_R8 = 336,
CV_AMD64_R9 = 337,
CV_AMD64_R10 = 338,
CV_AMD64_R11 = 339,
CV_AMD64_R12 = 340,
CV_AMD64_R13 = 341,
CV_AMD64_R14 = 342,
CV_AMD64_R15 = 343,
};
CV_X86_REG dwarf_to_x86_reg(unsigned dwarf_reg)
{
switch (dwarf_reg)
{
case 0: return CV_REG_EAX;
case 1: return CV_REG_ECX;
case 2: return CV_REG_EDX;
case 3: return CV_REG_EBX;
case 4: return CV_REG_ESP;
case 5: return CV_REG_EBP;
case 6: return CV_REG_ESI;
case 7: return CV_REG_EDI;
case 8: return CV_REG_EIP;
case 9: return CV_REG_EFLAGS;
case 10: return CV_REG_CS;
case 11: return CV_REG_SS;
case 12: return CV_REG_DS;
case 13: return CV_REG_ES;
case 14: return CV_REG_FS;
case 15: return CV_REG_GS;
case 16: case 17: case 18: case 19:
case 20: case 21: case 22: case 23:
return (CV_X86_REG)(CV_REG_ST0 + dwarf_reg - 16);
case 32: case 33: case 34: case 35:
case 36: case 37: case 38: case 39:
return (CV_X86_REG)(CV_REG_XMM0 + dwarf_reg - 32);
default:
return CV_REG_NONE;
}
}
CV_X86_REG dwarf_to_amd64_reg(unsigned dwarf_reg)
{
switch (dwarf_reg)
{
case 0: return CV_AMD64_RAX;
case 1: return CV_AMD64_RDX;
case 2: return CV_AMD64_RCX;
case 3: return CV_AMD64_RBX;
case 4: return CV_AMD64_RSI;
case 5: return CV_AMD64_RDI;
case 6: return CV_AMD64_RBP;
case 7: return CV_AMD64_RSP;
case 8: return CV_AMD64_R8;
case 9: return CV_AMD64_R9;
case 10: return CV_AMD64_R10;
case 11: return CV_AMD64_R11;
case 12: return CV_AMD64_R12;
case 13: return CV_AMD64_R13;
case 14: return CV_AMD64_R14;
case 15: return CV_AMD64_R15;
case 16: return CV_REG_IP;
case 49: return CV_REG_EFLAGS;
case 50: return CV_REG_ES;
case 51: return CV_REG_CS;
case 52: return CV_REG_SS;
case 53: return CV_REG_DS;
case 54: return CV_REG_FS;
case 55: return CV_REG_GS;
case 17: case 18: case 19: case 20:
case 21: case 22: case 23: case 24:
return (CV_X86_REG)(CV_REG_XMM0 + dwarf_reg - 17);
case 25: case 26: case 27: case 28:
case 29: case 30: case 31: case 32:
return (CV_X86_REG)(CV_REG_XMM8 + dwarf_reg - 25);
case 33: case 34: case 35: case 36:
case 37: case 38: case 39: case 40:
return (CV_X86_REG)(CV_REG_ST0 + dwarf_reg - 33);
default:
return CV_REG_NONE;
}
}
// Call Frame Information entry (CIE or FDE)
class CFIEntry
{
public:
enum Type
{
CIE,
FDE
};
byte* ptr;
byte* end;
byte type;
unsigned long CIE_pointer; //
// CIE
byte version;
const char* augmentation;
byte address_size;
byte segment_size;
unsigned long code_alignment_factor;
unsigned long data_alignment_factor;
unsigned long return_address_register;
byte* initial_instructions;
unsigned long initial_instructions_length;
// FDE
unsigned long segment;
unsigned long initial_location;
unsigned long address_range;
byte* instructions;
unsigned long instructions_length;
};
// Call Frame Information Cursor
class CFICursor
{
public:
CFICursor(const PEImage& img)
: beg((byte*)img.debug_frame)
, end((byte*)img.debug_frame + img.debug_frame_length)
, ptr(beg)
{
default_address_size = img.isX64() ? 8 : 4;
}
byte* beg;
byte* end;
byte* ptr;
byte default_address_size;
bool readCIE(CFIEntry& entry, byte* &p)
{
entry.version = *p++;
entry.augmentation = (char*) p++;
if(entry.augmentation[0])
{
// not supporting any augmentation
entry.address_size = 4;
entry.segment_size = 0;
entry.code_alignment_factor = 0;
entry.data_alignment_factor = 0;
entry.return_address_register = 0;
}
else
{
if (entry.version >= 4)
{
entry.address_size = *p++;
entry.segment_size = *p++;
}
else
{
entry.address_size = default_address_size;
entry.segment_size = 0;
}
entry.code_alignment_factor = LEB128(p);
entry.data_alignment_factor = SLEB128(p);
entry.return_address_register = LEB128(p);
}
entry.initial_instructions = p;
entry.initial_instructions_length = 0; // to be calculated outside
return true;
}
bool readHeader(byte* &p, byte* &pend, unsigned long& CIE_pointer)
{
if (p >= end)
return false;
long long len = RDsize(p, 4);
bool dwarf64 = (len == 0xffffffff);
int ptrsize = dwarf64 ? 8 : 4;
if(dwarf64)
len = RDsize(p, 8);
if(p + len > end)
return false;
pend = p + (unsigned long) len;
CIE_pointer = (unsigned long) RDsize(p, ptrsize);
return true;
}
bool readNext(CFIEntry& entry)
{
byte* p = ptr;
if(!readHeader(p, entry.end, entry.CIE_pointer))
return false;
entry.ptr = ptr;
if (entry.CIE_pointer == 0xffffffff)
{
entry.type = CFIEntry::CIE;
readCIE(entry, p);
entry.initial_instructions_length = entry.end - p;
}
else
{
entry.type = CFIEntry::FDE;
byte* q = beg + entry.CIE_pointer, *qend;
unsigned long cie_off;
if (!readHeader(q, qend, cie_off))
return false;
if (cie_off != 0xffffffff)
return false;
readCIE(entry, q);
entry.initial_instructions_length = qend - entry.initial_instructions;
entry.segment = (unsigned long)(entry.segment_size > 0 ? RDsize(p, entry.segment_size) : 0);
entry.initial_location = (unsigned long)RDsize(p, entry.address_size);
entry.address_range = (unsigned long)RDsize(p, entry.address_size);
entry.instructions = p;
entry.instructions_length = entry.end - p;
}
ptr = entry.end;
return true;
}
};
class CFACursor
{
public:
CFACursor(const CFIEntry& cfientry, unsigned long location)
: entry (cfientry)
{
loc = location;
cfa = { Location::RegRel, DW_REG_CFA, 0 };
setInstructions(entry.initial_instructions, entry.initial_instructions_length);
}
void setInstructions(byte* instructions, int length)
{
beg = instructions;
end = instructions + length;
ptr = beg;
}
bool beforeRestore()
{
if(ptr >= end)
return false;
byte instr = *ptr;
if ((instr & 0xc0) == DW_CFA_restore || instr == DW_CFA_restore_extended || instr == DW_CFA_restore_state)
return true;
return false;
}
bool processNext()
{
if(ptr >= end)
return false;
byte instr = *ptr++;
int reg, off;
switch(instr & 0xc0)
{
case DW_CFA_advance_loc:
loc += (instr & 0x3f) * entry.code_alignment_factor;
break;
case DW_CFA_offset:
reg = instr & 0x3f; // set register rule to "factored offset"
off = LEB128(ptr) * entry.data_alignment_factor;
break;
case DW_CFA_restore:
reg = instr & 0x3f; // restore register to initial state
break;
case DW_CFA_extended:
switch(instr)
{
case DW_CFA_set_loc:
loc = RDsize(ptr, entry.address_size);
break;
case DW_CFA_advance_loc1:
loc = *ptr++;
break;
case DW_CFA_advance_loc2:
loc = RDsize(ptr, 2);
break;
case DW_CFA_advance_loc4:
loc = RDsize(ptr, 4);
break;
case DW_CFA_def_cfa:
cfa.reg = LEB128(ptr);
cfa.off = LEB128(ptr);
break;
case DW_CFA_def_cfa_sf:
cfa.reg = LEB128(ptr);
cfa.off = SLEB128(ptr) * entry.data_alignment_factor;
break;
case DW_CFA_def_cfa_register:
cfa.reg = LEB128(ptr);
break;
case DW_CFA_def_cfa_offset:
cfa.off = LEB128(ptr);
break;
case DW_CFA_def_cfa_offset_sf:
cfa.off = SLEB128(ptr) * entry.data_alignment_factor;
break;
case DW_CFA_def_cfa_expression:
{
DWARF_Attribute attr;
attr.type = ExprLoc;
attr.expr.len = LEB128(ptr);
attr.expr.ptr = ptr;
cfa = decodeLocation(attr);
ptr += attr.expr.len;
break;
}
case DW_CFA_undefined:
reg = LEB128(ptr); // set register rule to "undefined"
break;
case DW_CFA_same_value:
reg = LEB128(ptr); // set register rule to "same value"
break;
case DW_CFA_offset_extended:
reg = LEB128(ptr); // set register rule to "factored offset"
off = LEB128(ptr) * entry.data_alignment_factor;
break;
case DW_CFA_offset_extended_sf:
reg = LEB128(ptr); // set register rule to "factored offset"
off = SLEB128(ptr) * entry.data_alignment_factor;
break;
case DW_CFA_val_offset:
reg = LEB128(ptr); // set register rule to "val offset"
off = LEB128(ptr) * entry.data_alignment_factor;
break;
case DW_CFA_val_offset_sf:
reg = LEB128(ptr); // set register rule to "val offset"
off = SLEB128(ptr) * entry.data_alignment_factor;
break;
case DW_CFA_register:
reg = LEB128(ptr); // set register rule to "register"
reg = LEB128(ptr);
break;
case DW_CFA_expression:
case DW_CFA_val_expression:
{
reg = LEB128(ptr); // set register rule to "expression"
DWARF_Attribute attr;
attr.type = Block;
attr.block.len = LEB128(ptr);
attr.block.ptr = ptr;
cfa = decodeLocation(attr); // TODO: push cfa on stack
ptr += attr.expr.len;
break;
}
case DW_CFA_restore_extended:
reg = LEB128(ptr); // restore register to initial state
break;
case DW_CFA_remember_state:
case DW_CFA_restore_state:
case DW_CFA_nop:
break;
}
}
return true;
}
const CFIEntry& entry;
byte* beg;
byte* end;
byte* ptr;
unsigned long long loc;
Location cfa;
};
Location findBestCFA(const PEImage& img, unsigned int pclo, unsigned int pchi)
{
bool x64 = img.isX64();
Location ebp = { Location::RegRel, x64 ? 6 : 5, x64 ? 16 : 8 };
if (!img.debug_frame)
return ebp;
CFIEntry entry;
CFICursor cursor(img);
while(cursor.readNext(entry))
{
if (entry.type == CFIEntry::FDE &&
entry.initial_location <= pclo && entry.initial_location + entry.address_range >= pchi)
{
CFACursor cfa(entry, pclo);
while(cfa.processNext()) {}
cfa.setInstructions(entry.instructions, entry.instructions_length);
while(!cfa.beforeRestore() && cfa.processNext()) {}
return cfa.cfa;
}
}
return ebp;
}
// Location list entry
class LOCEntry
{
public:
byte* ptr;
unsigned long beg_offset;
unsigned long end_offset;
Location loc;
bool eol() const { return beg_offset == 0 && end_offset == 0; }
};
// Location list cursor
class LOCCursor
{
public:
LOCCursor(const PEImage& img, DWARF_CompilationUnit* cu, unsigned long off)
: beg((byte*)img.debug_loc)
, end((byte*)img.debug_loc + img.debug_loc_length)
, ptr(beg + off)
{
default_address_size = img.isX64() ? 8 : 4;
}
byte* beg;
byte* end;
byte* ptr;
byte default_address_size;
bool readNext(LOCEntry& entry)
{
if(ptr >= end)
return false;
entry.beg_offset = (unsigned long) RDsize(ptr, default_address_size);
entry.end_offset = (unsigned long) RDsize(ptr, default_address_size);
if (entry.eol())
return true;
DWARF_Attribute attr;
attr.type = Block;
attr.block.len = RD2(ptr);
attr.block.ptr = ptr;
entry.loc = decodeLocation(attr);
ptr += attr.expr.len;
return true;
}
};
Location findBestFBLoc(const PEImage& img, DWARF_CompilationUnit* cu, unsigned long fblocoff)
{
int regebp = img.isX64() ? 6 : 5;
LOCCursor cursor(img, cu, fblocoff);
LOCEntry entry;
Location longest = { Location::RegRel, DW_REG_CFA, 0 };
unsigned long longest_range = 0;
while(cursor.readNext(entry) && !entry.eol())
{
if(entry.loc.is_regrel() && entry.loc.reg == regebp)
return entry.loc;
unsigned long range = entry.end_offset - entry.beg_offset;
if(range > longest_range)
{
longest_range = range;
longest = entry.loc;
}
}
return longest;
}
void CV2PDB::appendStackVar(const char* name, int type, Location& loc, Location& cfa)
{
unsigned int len;
unsigned int align = 4;
checkUdtSymbolAlloc(100 + kMaxNameLen);
codeview_symbol*cvs = (codeview_symbol*) (udtSymbols + cbUdtSymbols);
int reg = loc.reg;
int off = loc.off;
CV_X86_REG baseReg;
if (reg == DW_REG_CFA)
{
reg = cfa.reg;
off += cfa.off;
}
if (img.isX64())
baseReg = dwarf_to_amd64_reg(reg);
else
baseReg = dwarf_to_x86_reg(reg);
if (baseReg == CV_REG_NONE)
return;
if (baseReg == CV_REG_EBP)
{
cvs->stack_v2.id = v3 ? S_BPREL_V3 : S_BPREL_V2;
cvs->stack_v2.offset = off;
cvs->stack_v2.symtype = type;
len = cstrcpy_v(v3, (BYTE*)&cvs->stack_v2.p_name, name);
len += (BYTE*)&cvs->stack_v2.p_name - (BYTE*)cvs;
}
else
{
cvs->regrel_v3.id = S_REGREL_V3;
cvs->regrel_v3.reg = baseReg;
cvs->regrel_v3.offset = off;
cvs->regrel_v3.symtype = type;
len = cstrcpy_v(true, (BYTE*)cvs->regrel_v3.name, name);
len += (BYTE*)&cvs->regrel_v3.name - (BYTE*)cvs;
}
for (; len & (align-1); len++)
udtSymbols[cbUdtSymbols + len] = 0xf4 - (len & 3);
cvs->stack_v2.len = len - 2;
cbUdtSymbols += len;
}
void CV2PDB::appendGlobalVar(const char* name, int type, int seg, int offset)
{
unsigned int len;
unsigned int align = 4;
for(char* cname = (char*) name; *cname; cname++)
if (*cname == '.')
*cname = dotReplacementChar;
checkUdtSymbolAlloc(100 + kMaxNameLen);
codeview_symbol*cvs = (codeview_symbol*) (udtSymbols + cbUdtSymbols);
cvs->data_v2.id = v3 ? S_GDATA_V3 : S_GDATA_V2;
cvs->data_v2.offset = offset;
cvs->data_v2.symtype = type;
cvs->data_v2.segment = seg;
len = cstrcpy_v (v3, (BYTE*) &cvs->data_v2.p_name, name);
len += (BYTE*) &cvs->data_v2.p_name - (BYTE*) cvs;
for (; len & (align-1); len++)
udtSymbols[cbUdtSymbols + len] = 0xf4 - (len & 3);
cvs->data_v2.len = len - 2;
cbUdtSymbols += len;
}
bool CV2PDB::appendEndArg()
{
checkUdtSymbolAlloc(8);
codeview_symbol*cvs = (codeview_symbol*) (udtSymbols + cbUdtSymbols);
cvs->generic.id = S_ENDARG_V1;
cvs->generic.len = 2;
cbUdtSymbols += 4;
return true;
}
void CV2PDB::appendEnd()
{
checkUdtSymbolAlloc(8);
codeview_symbol*cvs = (codeview_symbol*) (udtSymbols + cbUdtSymbols);
cvs->generic.id = S_END_V1;
cvs->generic.len = 2;
cbUdtSymbols += 4;
}
void CV2PDB::appendLexicalBlock(DWARF_InfoData& id, unsigned int proclo)
{
checkUdtSymbolAlloc(32);
codeview_symbol*dsym = (codeview_symbol*) (udtSymbols + cbUdtSymbols);
dsym->block_v3.id = S_BLOCK_V3;
dsym->block_v3.parent = 0;
dsym->block_v3.end = 0; // destSize + sizeof(dsym->block_v3) + 12;
dsym->block_v3.length = id.pchi - id.pclo;
dsym->block_v3.offset = id.pclo - codeSegOff;
dsym->block_v3.segment = img.codeSegment + 1;
dsym->block_v3.name[0] = 0;
int len = sizeof(dsym->block_v3);
for (; len & 3; len++)
udtSymbols[cbUdtSymbols + len] = 0xf4 - (len & 3);
dsym->block_v3.len = len - 2;
cbUdtSymbols += len;
}
bool CV2PDB::addDWARFProc(DWARF_InfoData& procid, DWARF_CompilationUnit* cu, DIECursor cursor)
{
unsigned int pclo = procid.pclo - codeSegOff;
unsigned int pchi = procid.pchi - codeSegOff;
unsigned int len;
unsigned int align = 4;
checkUdtSymbolAlloc(100 + kMaxNameLen);
// GLOBALPROC
codeview_symbol*cvs = (codeview_symbol*) (udtSymbols + cbUdtSymbols);
cvs->proc_v2.id = v3 ? S_GPROC_V3 : S_GPROC_V2;
cvs->proc_v2.pparent = 0;
cvs->proc_v2.pend = 0;
cvs->proc_v2.next = 0;
cvs->proc_v2.proc_len = pchi - pclo;
cvs->proc_v2.debug_start = pclo - pclo;
cvs->proc_v2.debug_end = pchi - pclo;
cvs->proc_v2.offset = pclo;
cvs->proc_v2.segment = img.codeSegment + 1;
cvs->proc_v2.proctype = 0; // translateType(sym->proc_v1.proctype);
cvs->proc_v2.flags = 0;
// printf("GlobalPROC %s\n", procid.name);
len = cstrcpy_v (v3, (BYTE*) &cvs->proc_v2.p_name, procid.name);
len += (BYTE*) &cvs->proc_v2.p_name - (BYTE*) cvs;
for (; len & (align-1); len++)
udtSymbols[cbUdtSymbols + len] = 0xf4 - (len & 3);
cvs->proc_v2.len = len - 2;
cbUdtSymbols += len;
#if 0 // add funcinfo
cvs = (codeview_symbol*) (udtSymbols + cbUdtSymbols);
cvs->funcinfo_32.id = S_FUNCINFO_32;
cvs->funcinfo_32.sizeLocals = 20;
memset(cvs->funcinfo_32.unknown, 0, sizeof(cvs->funcinfo_32.unknown));
cvs->funcinfo_32.unknown[5] = 4;
cvs->funcinfo_32.info = 0x4200;
cvs->funcinfo_32.unknown2 = 0x11;
len = sizeof(cvs->funcinfo_32);
for (; len & (align-1); len++)
udtSymbols[cbUdtSymbols + len] = 0xf4 - (len & 3);
cvs->funcinfo_32.len = len - 2;
cbUdtSymbols += len;
#endif
#if 0
addStackVar("local_var", 0x1001, 8);
#endif
Location frameBase = decodeLocation(procid.frame_base, 0, DW_AT_frame_base);
if (frameBase.is_abs()) // pointer into location list in .debug_loc? assume CFA
frameBase = findBestFBLoc(img, cu, frameBase.off);
Location cfa = findBestCFA(img, procid.pclo, procid.pchi);
if (cu)
{
bool endarg = false;
DWARF_InfoData id;
int off = 8;
DIECursor prev = cursor;
while (cursor.readNext(id, true))
{
if (id.tag == DW_TAG_formal_parameter)
{
if (id.name && (id.location.type == ExprLoc || id.location.type == Block))
{
Location loc = decodeLocation(id.location, &frameBase);
if (loc.is_regrel())
appendStackVar(id.name, getTypeByDWARFPtr(cu, id.type), loc, cfa);
}
}
}
appendEndArg();
std::vector<DIECursor> lexicalBlocks;
lexicalBlocks.push_back(prev);
while (!lexicalBlocks.empty())
{
cursor = lexicalBlocks.back();
lexicalBlocks.pop_back();
while (cursor.readNext(id))
{
if (id.tag == DW_TAG_lexical_block)
{
// It seems it is not possible to describe blocks with
// non-contiguous address ranges in CodeView. Instead,
// just create a range that is large enough to cover
// all continuous ranges.
if (id.hasChild && id.ranges != -1u)
{
id.pclo = -1u;
id.pchi = 0;
// TODO: handle base address selection
byte *r = (byte *)img.debug_ranges + id.ranges;
byte *rend = (byte *)img.debug_ranges + img.debug_ranges_length;
while (r < rend)
{
uint32_t pclo = RD4(r);
uint32_t pchi = RD4(r);
if (pclo == 0 && pchi == 0)
break;
if (pclo >= pchi)
continue;
id.pclo = min(id.pclo, pclo + currentBaseAddress);
id.pchi = max(id.pchi, pchi + currentBaseAddress);
}
}
if (id.hasChild && id.pchi > id.pclo)
{
appendLexicalBlock(id, pclo + codeSegOff);
DIECursor next = cursor;
next.gotoSibling();
assert(lexicalBlocks.empty() || next.ptr <= lexicalBlocks.back().ptr);
lexicalBlocks.push_back(next);
cursor = cursor.getSubtreeCursor();
continue;
}
}
else if (id.tag == DW_TAG_variable)
{
if (id.name && (id.location.type == ExprLoc || id.location.type == Block))
{
Location loc = decodeLocation(id.location, &frameBase);
if (loc.is_regrel())
appendStackVar(id.name, getTypeByDWARFPtr(cu, id.type), loc, cfa);
}
}
cursor.gotoSibling();
}
appendEnd();
assert(lexicalBlocks.empty() || cursor.ptr <= lexicalBlocks.back().ptr);
}
}
else
{
appendEndArg();
appendEnd();
}
return true;
}
int CV2PDB::addDWARFStructure(DWARF_InfoData& structid, DWARF_CompilationUnit* cu, DIECursor cursor)
{
//printf("Adding struct %s, entryoff %d, abbrev %d\n", structid.name, structid.entryOff, structid.abbrev);
bool isunion = structid.tag == DW_TAG_union_type;
int fieldlistType = 0;
int nfields = 0;
if (cu)
{
checkDWARFTypeAlloc(100);
codeview_reftype* fl = (codeview_reftype*) (dwarfTypes + cbDwarfTypes);
int flbegin = cbDwarfTypes;
fl->fieldlist.id = LF_FIELDLIST_V2;
cbDwarfTypes += 4;
#if 0
if(structid.containing_type && structid.containing_type != structid.entryOff)
{
codeview_fieldtype* bc = (codeview_fieldtype*) (dwarfTypes + cbDwarfTypes);
bc->bclass_v2.id = LF_BCLASS_V2;
bc->bclass_v2.offset = 0;
bc->bclass_v2.type = getTypeByDWARFPtr(cu, structid.containing_type);
bc->bclass_v2.attribute = 3; // public
cbDwarfTypes += sizeof(bc->bclass_v2);
for (; cbDwarfTypes & 3; cbDwarfTypes++)
dwarfTypes[cbDwarfTypes] = 0xf4 - (cbDwarfTypes & 3);
nfields++;
}
#endif
// cursor points to the first member
DWARF_InfoData id;
int len = 0;
while (cursor.readNext(id, true))
{
int cvid = -1;
if (id.tag == DW_TAG_member && id.name)
{
//printf(" Adding field %s\n", id.name);
int off = 0;
if (!isunion)
{
Location loc = decodeLocation(id.member_location, 0, DW_AT_data_member_location);
if (loc.is_abs())
{
off = loc.off;
cvid = S_CONSTANT_V2;
}
}
if(isunion || cvid == S_CONSTANT_V2)
{
checkDWARFTypeAlloc(kMaxNameLen + 100);
codeview_fieldtype* dfieldtype = (codeview_fieldtype*) (dwarfTypes + cbDwarfTypes);
cbDwarfTypes += addFieldMember(dfieldtype, 0, off, getTypeByDWARFPtr(cu, id.type), id.name);
nfields++;
}
}
else if(id.tag == DW_TAG_inheritance)
{
int off;
Location loc = decodeLocation(id.member_location, 0, DW_AT_data_member_location);
if (loc.is_abs())
{
cvid = S_CONSTANT_V2;
off = loc.off;
}
if(cvid == S_CONSTANT_V2)
{
codeview_fieldtype* bc = (codeview_fieldtype*) (dwarfTypes + cbDwarfTypes);
bc->bclass_v2.id = LF_BCLASS_V2;
bc->bclass_v2.offset = off;
bc->bclass_v2.type = getTypeByDWARFPtr(cu, id.type);
bc->bclass_v2.attribute = 3; // public
cbDwarfTypes += sizeof(bc->bclass_v2);
for (; cbDwarfTypes & 3; cbDwarfTypes++)
dwarfTypes[cbDwarfTypes] = 0xf4 - (cbDwarfTypes & 3);
nfields++;
}
}
cursor.gotoSibling();
}
fl = (codeview_reftype*) (dwarfTypes + flbegin);
fl->fieldlist.len = cbDwarfTypes - flbegin - 2;
fieldlistType = nextDwarfType++;
}
checkUserTypeAlloc(kMaxNameLen + 100);
codeview_type* cvt = (codeview_type*) (userTypes + cbUserTypes);
const char* name = (structid.name ? structid.name : "__noname");
int attr = fieldlistType ? 0 : kPropIncomplete;
int len = addAggregate(cvt, false, nfields, fieldlistType, attr, 0, 0, structid.byte_size, name, nullptr);
cbUserTypes += len;
//ensureUDT()?
int cvtype = nextUserType++;
addUdtSymbol(cvtype, name);
return cvtype;
}
int CV2PDB::getDWARFArrayBounds(DWARF_InfoData& arrayid, DWARF_CompilationUnit* cu,
DIECursor cursor, int& upperBound)
{
int lowerBound = 0;
if (cu)
{
DWARF_InfoData id;
while (cursor.readNext(id, true))
{
int cvid = -1;
if (id.tag == DW_TAG_subrange_type)
{
lowerBound = id.lower_bound;
upperBound = id.upper_bound;
}
cursor.gotoSibling();
}
}
return lowerBound;
}
int CV2PDB::addDWARFArray(DWARF_InfoData& arrayid, DWARF_CompilationUnit* cu,
DIECursor cursor)
{
int upperBound, lowerBound = getDWARFArrayBounds(arrayid, cu, cursor, upperBound);
checkUserTypeAlloc(kMaxNameLen + 100);
codeview_type* cvt = (codeview_type*) (userTypes + cbUserTypes);
cvt->array_v2.id = v3 ? LF_ARRAY_V3 : LF_ARRAY_V2;
cvt->array_v2.elemtype = getTypeByDWARFPtr(cu, arrayid.type);
cvt->array_v2.idxtype = 0x74;
int len = (BYTE*)&cvt->array_v2.arrlen - (BYTE*)cvt;
int size = (upperBound - lowerBound + 1) * getDWARFTypeSize(cu, arrayid.type);
len += write_numeric_leaf(size, &cvt->array_v2.arrlen);
((BYTE*)cvt)[len++] = 0; // empty name
for (; len & 3; len++)
userTypes[cbUserTypes + len] = 0xf4 - (len & 3);
cvt->array_v2.len = len - 2;
cbUserTypes += len;
int cvtype = nextUserType++;
return cvtype;
}
bool CV2PDB::addDWARFTypes()
{
checkUdtSymbolAlloc(100);
int prefix = 4;
DWORD* ddata = new DWORD [img.debug_info_length/4]; // large enough
unsigned char *data = (unsigned char*) (ddata + prefix);
unsigned int off = 0;
unsigned int len;
unsigned int align = 4;
// SSEARCH
codeview_symbol* cvs = (codeview_symbol*) (data + off);
cvs->ssearch_v1.id = S_SSEARCH_V1;
cvs->ssearch_v1.segment = img.codeSegment + 1;
cvs->ssearch_v1.offset = 0;
len = sizeof(cvs->ssearch_v1);
for (; len & (align-1); len++)
data[off + len] = 0xf4 - (len & 3);
cvs->ssearch_v1.len = len - 2;
off += len;
// COMPILAND
cvs = (codeview_symbol*) (data + off);
cvs->compiland_v1.id = S_COMPILAND_V1;
cvs->compiland_v1.language = 1; // C++
cvs->compiland_v1.flags = 0x80; // ?, data model
cvs->compiland_v1.machine = img.isX64() ? 0xd0 : 6; //0x06: Pentium Pro/II, 0xd0: x64
len = sizeof(cvs->compiland_v1) - sizeof(cvs->compiland_v1.p_name);
len += c2p("cv2pdb", cvs->compiland_v1.p_name);
for (; len & (align-1); len++)
data[off + len] = 0xf4 - (len & 3);
cvs->compiland_v1.len = len - 2;
off += len;
#if 0
// define one proc over everything
int s = codeSegment;
int pclo = 0; // img.getImageBase() + img.getSection(s).VirtualAddress;
int pchi = pclo + img.getSection(s).Misc.VirtualSize;
addDWARFProc("procall", pclo, pchi, 0, 0, 0);
#endif
//////////////////////////
mspdb::Mod* mod = globalMod();
//return writeSymbols (mod, ddata, off, prefix, true);
return addSymbols (mod, data, off, true);
}
bool CV2PDB::addDWARFSectionContrib(mspdb::Mod* mod, unsigned long pclo, unsigned long pchi)
{
int segIndex = img.findSection(pclo);
if(segIndex >= 0)
{
int segFlags = 0x60101020; // 0x40401040, 0x60500020; // TODO
int rc = mod->AddSecContrib(segIndex, pclo, pchi - pclo, segFlags);
if (rc <= 0)
return setError("cannot add section contribution to module");
}
return true;
}
int CV2PDB::addDWARFBasicType(const char*name, int encoding, int byte_size)
{
int type = 0, mode = 0, size = 0;
switch(encoding)
{
case DW_ATE_boolean: type = 3; break;
case DW_ATE_complex_float: type = 5; byte_size /= 2; break;
case DW_ATE_float: type = 4; break;
case DW_ATE_signed: type = 1; break;
case DW_ATE_signed_char: type = 7; break;
case DW_ATE_unsigned: type = 2; break;
case DW_ATE_unsigned_char: type = 7; break;
case DW_ATE_imaginary_float:type = 4; break;
case DW_ATE_UTF: type = 7; break;
default:
setError("unknown basic type encoding");
}
switch(type)
{
case 1: // signed
case 2: // unsigned
case 3: // boolean
switch(byte_size)
{
case 1: size = 0; break;
case 2: size = 1; break;
case 4: size = 2; break;
case 8: size = 3; break;
case 16: size = 4; break; // __int128? experimental, type exists with GCC for Win64
default:
setError("unsupported integer type size");
}
break;
case 4:
case 5:
switch(byte_size)
{
case 4: size = 0; break;
case 8: size = 1; break;
case 10: size = 2; break;
case 12: size = 2; break; // with padding bytes
case 16: size = 3; break;
case 6: size = 4; break;
default:
setError("unsupported real type size");
}
break;
case 7:
switch(byte_size)
{
case 1: size = 0; break;
case 2: size = encoding == DW_ATE_signed_char ? 2 : 3; break;
case 4: size = encoding == DW_ATE_signed_char ? 4 : 5; break;
case 8: size = encoding == DW_ATE_signed_char ? 6 : 7; break;
default:
setError("unsupported real int type size");
}
}
int t = size | (type << 4);
t = translateType(t);
int cvtype = appendTypedef(t, name, false);
if(useTypedefEnum)
addUdtSymbol(cvtype, name);
return cvtype;
}
int CV2PDB::getTypeByDWARFPtr(DWARF_CompilationUnit* cu, byte* ptr)
{
std::unordered_map<byte*, int>::iterator it = mapOffsetToType.find(ptr);
if(it == mapOffsetToType.end())
return 0x03; // void
return it->second;
}
int CV2PDB::getDWARFTypeSize(DWARF_CompilationUnit* cu, byte* typePtr)
{
DWARF_InfoData id;
DIECursor cursor(cu, typePtr);
if (!cursor.readNext(id))
return 0;
if(id.byte_size > 0)
return id.byte_size;
switch(id.tag)
{
case DW_TAG_ptr_to_member_type:
case DW_TAG_reference_type:
case DW_TAG_pointer_type:
return cu->address_size;
case DW_TAG_array_type:
{
int upperBound, lowerBound = getDWARFArrayBounds(id, cu, cursor, upperBound);
return (upperBound + lowerBound + 1) * getDWARFTypeSize(cu, id.type);
}
default:
if(id.type)
return getDWARFTypeSize(cu, id.type);
break;
}
return 0;
}
bool CV2PDB::mapTypes()
{
int typeID = nextUserType;
unsigned long off = 0;
while (off < img.debug_info_length)
{
DWARF_CompilationUnit* cu = (DWARF_CompilationUnit*)(img.debug_info + off);
DIECursor cursor(cu, (byte*)cu + sizeof(DWARF_CompilationUnit));
DWARF_InfoData id;
while (cursor.readNext(id))
{
//printf("0x%08x, level = %d, id.code = %d, id.tag = %d\n",
// (unsigned char*)cu + id.entryOff - (unsigned char*)img.debug_info, cursor.level, id.code, id.tag);
switch (id.tag)
{
case DW_TAG_base_type:
case DW_TAG_typedef:
case DW_TAG_pointer_type:
case DW_TAG_subroutine_type:
case DW_TAG_array_type:
case DW_TAG_const_type:
case DW_TAG_structure_type:
case DW_TAG_reference_type:
case DW_TAG_class_type:
case DW_TAG_enumeration_type:
case DW_TAG_string_type:
case DW_TAG_union_type:
case DW_TAG_ptr_to_member_type:
case DW_TAG_set_type:
case DW_TAG_subrange_type:
case DW_TAG_file_type:
case DW_TAG_packed_type:
case DW_TAG_thrown_type:
case DW_TAG_volatile_type:
case DW_TAG_restrict_type: // DWARF3
case DW_TAG_interface_type:
case DW_TAG_unspecified_type:
case DW_TAG_mutable_type: // withdrawn
case DW_TAG_shared_type:
case DW_TAG_rvalue_reference_type:
mapOffsetToType.insert(std::make_pair(id.entryPtr, typeID));
typeID++;
}
}
off += sizeof(cu->unit_length) + cu->unit_length;
}
nextDwarfType = typeID;
return true;
}
bool CV2PDB::createTypes()
{
mspdb::Mod* mod = globalMod();
int typeID = nextUserType;
int pointerAttr = img.isX64() ? 0x1000C : 0x800A;
unsigned long off = 0;
while (off < img.debug_info_length)
{
DWARF_CompilationUnit* cu = (DWARF_CompilationUnit*)(img.debug_info + off);
DIECursor cursor(cu, (byte*)cu + sizeof(DWARF_CompilationUnit));
DWARF_InfoData id;
while (cursor.readNext(id))
{
//printf("0x%08x, level = %d, id.code = %d, id.tag = %d\n",
// (unsigned char*)cu + id.entryOff - (unsigned char*)img.debug_info, cursor.level, id.code, id.tag);
if (id.specification)
{
DIECursor specCursor(cu, id.specification);
DWARF_InfoData idspec;
specCursor.readNext(idspec);
//assert seems invalid, combination DW_TAG_member and DW_TAG_variable found in the wild
//assert(id.tag == idspec.tag);
id.merge(idspec);
}
int cvtype = -1;
switch (id.tag)
{
case DW_TAG_base_type:
cvtype = addDWARFBasicType(id.name, id.encoding, id.byte_size);
break;
case DW_TAG_typedef:
cvtype = appendModifierType(getTypeByDWARFPtr(cu, id.type), 0);
addUdtSymbol(cvtype, id.name);
break;
case DW_TAG_pointer_type:
cvtype = appendPointerType(getTypeByDWARFPtr(cu, id.type), pointerAttr);
break;
case DW_TAG_const_type:
cvtype = appendModifierType(getTypeByDWARFPtr(cu, id.type), 1);
break;
case DW_TAG_reference_type:
cvtype = appendPointerType(getTypeByDWARFPtr(cu, id.type), pointerAttr | 0x20);
break;
case DW_TAG_class_type:
case DW_TAG_structure_type:
case DW_TAG_union_type:
cvtype = addDWARFStructure(id, cu, cursor.getSubtreeCursor());
break;
case DW_TAG_array_type:
cvtype = addDWARFArray(id, cu, cursor.getSubtreeCursor());
break;
case DW_TAG_subroutine_type:
case DW_TAG_subrange_type:
case DW_TAG_enumeration_type:
case DW_TAG_string_type:
case DW_TAG_ptr_to_member_type:
case DW_TAG_set_type:
case DW_TAG_file_type:
case DW_TAG_packed_type:
case DW_TAG_thrown_type:
case DW_TAG_volatile_type:
case DW_TAG_restrict_type: // DWARF3
case DW_TAG_interface_type:
case DW_TAG_unspecified_type:
case DW_TAG_mutable_type: // withdrawn
case DW_TAG_shared_type:
case DW_TAG_rvalue_reference_type:
cvtype = appendPointerType(0x74, pointerAttr);
break;
case DW_TAG_subprogram:
if (id.name && id.pclo && id.pchi)
{
addDWARFProc(id, cu, cursor.getSubtreeCursor());
int rc = mod->AddPublic2(id.name, img.codeSegment + 1, id.pclo - codeSegOff, 0);
}
break;
case DW_TAG_compile_unit:
currentBaseAddress = id.pclo;
#if !FULL_CONTRIB
if (id.dir && id.name)
{
if (id.ranges > 0 && id.ranges < img.debug_ranges_length)
{
unsigned char* r = (unsigned char*)img.debug_ranges + id.ranges;
unsigned char* rend = (unsigned char*)img.debug_ranges + img.debug_ranges_length;
while (r < rend)
{
unsigned long pclo = RD4(r);
unsigned long pchi = RD4(r);
if (pclo == 0 && pchi == 0)
break;
//printf("%s %s %x - %x\n", dir, name, pclo, pchi);
if (!addDWARFSectionContrib(mod, pclo, pchi))
return false;
}
}
else
{
//printf("%s %s %x - %x\n", dir, name, pclo, pchi);
if (!addDWARFSectionContrib(mod, id.pclo, id.pchi))
return false;
}
}
#endif
break;
case DW_TAG_variable:
if (id.name)
{
int seg = -1;
unsigned long segOff;
if (id.location.type == Invalid && id.external && id.linkage_name)
{
seg = img.findSymbol(id.linkage_name, segOff);
}
else
{
Location loc = decodeLocation(id.location);
if (loc.is_abs())
{
segOff = loc.off;
seg = img.findSection(segOff);
if (seg >= 0)
segOff -= img.getImageBase() + img.getSection(seg).VirtualAddress;
}
}
if (seg >= 0)
{
int type = getTypeByDWARFPtr(cu, id.type);
appendGlobalVar(id.name, type, seg + 1, segOff);
int rc = mod->AddPublic2(id.name, seg + 1, segOff, type);
}
}
break;
case DW_TAG_formal_parameter:
case DW_TAG_unspecified_parameters:
case DW_TAG_inheritance:
case DW_TAG_member:
case DW_TAG_inlined_subroutine:
case DW_TAG_lexical_block:
default:
break;
}
if (cvtype >= 0)
{
assert(cvtype == typeID); typeID++;
assert(mapOffsetToType[id.entryPtr] == cvtype);
}
}
off += sizeof(cu->unit_length) + cu->unit_length;
}
return true;
}
bool CV2PDB::createDWARFModules()
{
if(!img.debug_info)
return setError("no .debug_info section found");
codeSegOff = img.getImageBase() + img.getSection(img.codeSegment).VirtualAddress;
mspdb::Mod* mod = globalMod();
for (int s = 0; s < img.countSections(); s++)
{
const IMAGE_SECTION_HEADER& sec = img.getSection(s);
int rc = dbi->AddSec(s + 1, 0x10d, 0, sec.SizeOfRawData);
if (rc <= 0)
return setError("cannot add section");
}
#define FULL_CONTRIB 1
#if FULL_CONTRIB
// we use a single global module, so we can simply add the whole text segment
int segFlags = 0x60101020; // 0x40401040, 0x60500020; // TODO
int s = img.codeSegment;
int pclo = 0; // img.getImageBase() + img.getSection(s).VirtualAddress;
int pchi = pclo + img.getSection(s).Misc.VirtualSize;
int rc = mod->AddSecContrib(s + 1, pclo, pchi - pclo, segFlags);
if (rc <= 0)
return setError("cannot add section contribution to module");
#endif
checkUserTypeAlloc();
*(DWORD*) userTypes = 4;
cbUserTypes = 4;
createEmptyFieldListType();
if(Dversion > 0)
{
appendComplex(0x50, 0x40, 4, "cfloat");
appendComplex(0x51, 0x41, 8, "cdouble");
appendComplex(0x52, 0x42, 12, "creal");
}
DIECursor::setContext(&img);
countEntries = 0;
if (!mapTypes())
return false;
if (!createTypes())
return false;
/*
if(!iterateDWARFDebugInfo(kOpMapTypes))
return false;
if(!iterateDWARFDebugInfo(kOpCreateTypes))
return false;
*/
#if 0
modules = new mspdb::Mod* [countEntries];
memset (modules, 0, countEntries * sizeof(*modules));
for (int m = 0; m < countEntries; m++)
{
mspdb::Mod* mod = globalMod();
}
#endif
if(cbUserTypes > 0 || cbDwarfTypes)
{
if(dwarfTypes)
{
checkUserTypeAlloc(cbDwarfTypes);
memcpy(userTypes + cbUserTypes, dwarfTypes, cbDwarfTypes);
cbUserTypes += cbDwarfTypes;
cbDwarfTypes = 0;
}
int rc = mod->AddTypes(userTypes, cbUserTypes);
if (rc <= 0)
return setError("cannot add type info to module");
}
return true;
}
bool CV2PDB::addDWARFLines()
{
if(!img.debug_line)
return setError("no .debug_line section found");
if (!interpretDWARFLines(img, globalMod()))
return setError("cannot add line number info to module");
return true;
}
bool CV2PDB::addDWARFPublics()
{
mspdb::Mod* mod = globalMod();
int type = 0;
int rc = mod->AddPublic2("public_all", img.codeSegment + 1, 0, 0x1000);
if (rc <= 0)
return setError("cannot add public");
return true;
}
bool CV2PDB::writeDWARFImage(const TCHAR* opath)
{
int len = sizeof(*rsds) + strlen((char*)(rsds + 1)) + 1;
if (!img.replaceDebugSection(rsds, len, false))
return setError(img.getLastError());
if (!img.save(opath))
return setError(img.getLastError());
return true;
}
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