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Sweden-Number/debugger/msc.c

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/*
* File msc.c - read VC++ debug information from COFF and eventually
* from PDB files.
*
* Copyright (C) 1996, Eric Youngdale.
* Copyright (C) 1999, Ulrich Weigand.
*
* Note - this handles reading debug information for 32 bit applications
* that run under Windows-NT for example. I doubt that this would work well
* for 16 bit applications, but I don't think it really matters since the
* file format is different, and we should never get in here in such cases.
*
* TODO:
* Get 16 bit CV stuff working.
* Add symbol size to internal symbol table.
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif
#include <fcntl.h>
#include <sys/stat.h>
#include <limits.h>
#include <string.h>
#include <unistd.h>
#ifndef PATH_MAX
#define PATH_MAX _MAX_PATH
#endif
#include "debugger.h"
#include "neexe.h"
#include "peexe.h"
#include "file.h"
typedef struct {
IMAGE_DEBUG_DIRECTORY dbgdir;
u_long sect_ofs;
int nsect;
char* dbg_info;
int dbg_size;
} MSC_DBG_INFO;
#define MSC_INFO(module) ((MSC_DBG_INFO*)((module)->extra_info))
/*
* dbg_filename must be at least MAX_PATHNAME_LEN bytes in size
*/
static void LocateDebugInfoFile(char *filename, char *dbg_filename)
{
char *str1 = DBG_alloc(MAX_PATHNAME_LEN*10);
char *str2 = DBG_alloc(MAX_PATHNAME_LEN);
char *file;
char *name_part;
DOS_FULL_NAME fullname;
file = strrchr(filename, '\\');
if( file == NULL ) file = filename; else file++;
if (GetEnvironmentVariableA("_NT_SYMBOL_PATH", str1, MAX_PATHNAME_LEN))
if (SearchPathA(str1, file, NULL, MAX_PATHNAME_LEN*10, str2, &name_part))
goto ok;
if (GetEnvironmentVariableA("_NT_ALT_SYMBOL_PATH", str1, MAX_PATHNAME_LEN))
if (SearchPathA(str1, file, NULL, MAX_PATHNAME_LEN*10, str2, &name_part))
goto ok;
if (SearchPathA(NULL, file, NULL, MAX_PATHNAME_LEN*10, str2, &name_part))
goto ok;
else
{
quit:
memcpy(dbg_filename, filename, MAX_PATHNAME_LEN);
DBG_free(str1);
DBG_free(str2);
return;
}
ok:
if (DOSFS_GetFullName(str2, TRUE, &fullname))
memcpy(dbg_filename, fullname.long_name, MAX_PATHNAME_LEN);
else
goto quit;
DBG_free(str1);
DBG_free(str2);
return;
}
union any_size
{
char * c;
short * s;
int * i;
unsigned int * ui;
};
/*
* This is a convenience structure used to map portions of the
* line number table.
*/
struct startend
{
unsigned int start;
unsigned int end;
};
/*
* This is how we reference the various record types.
*/
union codeview_symbol
{
struct
{
short int len;
short int id;
} generic;
struct
{
short int len;
short int id;
unsigned int offset;
unsigned short seg;
unsigned short symtype;
unsigned char namelen;
unsigned char name[1];
} data;
struct
{
short int len;
short int id;
unsigned int symtype;
unsigned int offset;
unsigned short seg;
unsigned char namelen;
unsigned char name[1];
} data32;
struct
{
short int len;
short int id;
unsigned int pparent;
unsigned int pend;
unsigned int next;
unsigned int offset;
unsigned short segment;
unsigned short thunk_len;
unsigned char thtype;
unsigned char namelen;
unsigned char name[1];
} thunk;
struct
{
short int len;
short int id;
unsigned int pparent;
unsigned int pend;
unsigned int next;
unsigned int proc_len;
unsigned int debug_start;
unsigned int debug_end;
unsigned int offset;
unsigned short segment;
unsigned short proctype;
unsigned char flags;
unsigned char namelen;
unsigned char name[1];
} proc;
struct
{
short int len;
short int id;
unsigned int pparent;
unsigned int pend;
unsigned int next;
unsigned int proc_len;
unsigned int debug_start;
unsigned int debug_end;
unsigned int proctype;
unsigned int offset;
unsigned short segment;
unsigned char flags;
unsigned char namelen;
unsigned char name[1];
} proc32;
struct
{
short int len; /* Total length of this entry */
short int id; /* Always S_BPREL32 */
unsigned int offset; /* Stack offset relative to BP */
unsigned short symtype;
unsigned char namelen;
unsigned char name[1];
} stack;
struct
{
short int len; /* Total length of this entry */
short int id; /* Always S_BPREL32 */
unsigned int offset; /* Stack offset relative to BP */
unsigned int symtype;
unsigned char namelen;
unsigned char name[1];
} stack32;
};
union codeview_type
{
struct
{
short int len;
short int id;
} generic;
struct
{
short int len;
short int id;
short int attribute;
short int datatype;
unsigned char variant[1];
} pointer;
struct
{
short int len;
short int id;
unsigned int datatype;
unsigned int attribute;
unsigned char variant[1];
} pointer32;
struct
{
short int len;
short int id;
unsigned char nbits;
unsigned char bitoff;
unsigned short type;
} bitfield;
struct
{
short int len;
short int id;
unsigned int type;
unsigned char nbits;
unsigned char bitoff;
} bitfield32;
struct
{
short int len;
short int id;
short int elemtype;
short int idxtype;
unsigned char arrlen;
unsigned char namelen;
unsigned char name[1];
} array;
struct
{
short int len;
short int id;
unsigned int elemtype;
unsigned int idxtype;
unsigned char arrlen;
unsigned char namelen;
unsigned char name[1];
} array32;
struct
{
short int len;
short int id;
short int n_element;
short int fieldlist;
short int property;
short int derived;
short int vshape;
unsigned short structlen;
unsigned char namelen;
unsigned char name[1];
} structure;
struct
{
short int len;
short int id;
short int n_element;
short int property;
unsigned int fieldlist;
unsigned int derived;
unsigned int vshape;
unsigned short structlen;
unsigned char namelen;
unsigned char name[1];
} structure32;
struct
{
short int len;
short int id;
short int count;
short int field;
short int property;
unsigned short un_len;
unsigned char namelen;
unsigned char name[1];
} t_union;
struct
{
short int len;
short int id;
short int count;
short int property;
unsigned int field;
unsigned short un_len;
unsigned char namelen;
unsigned char name[1];
} t_union32;
struct
{
short int len;
short int id;
short int count;
short int type;
short int field;
short int property;
unsigned char namelen;
unsigned char name[1];
} enumeration;
struct
{
short int len;
short int id;
short int count;
short int property;
unsigned int type;
unsigned int field;
unsigned char namelen;
unsigned char name[1];
} enumeration32;
struct
{
short int id;
short int attribute;
unsigned short int value;
unsigned char namelen;
unsigned char name[1];
} enumerate;
struct
{
short int id;
short int type;
short int attribute;
unsigned short int offset;
unsigned char namelen;
unsigned char name[1];
} member;
struct
{
short int id;
short int attribute;
unsigned int type;
unsigned short int offset;
unsigned char namelen;
unsigned char name[1];
} member32;
};
#define S_COMPILE 0x0001
#define S_REGISTER 0x0002
#define S_CONSTANT 0x0003
#define S_UDT 0x0004
#define S_SSEARCH 0x0005
#define S_END 0x0006
#define S_SKIP 0x0007
#define S_CVRESERVE 0x0008
#define S_OBJNAME 0x0009
#define S_ENDARG 0x000a
#define S_COBOLUDT 0x000b
#define S_MANYREG 0x000c
#define S_RETURN 0x000d
#define S_ENTRYTHIS 0x000e
#define S_BPREL 0x0200
#define S_LDATA 0x0201
#define S_GDATA 0x0202
#define S_PUB 0x0203
#define S_LPROC 0x0204
#define S_GPROC 0x0205
#define S_THUNK 0x0206
#define S_BLOCK 0x0207
#define S_WITH 0x0208
#define S_LABEL 0x0209
#define S_CEXMODEL 0x020a
#define S_VFTPATH 0x020b
#define S_REGREL 0x020c
#define S_LTHREAD 0x020d
#define S_GTHREAD 0x020e
#define S_PROCREF 0x0400
#define S_DATAREF 0x0401
#define S_ALIGN 0x0402
#define S_LPROCREF 0x0403
#define S_REGISTER_32 0x1001 /* Variants with new 32-bit type indices */
#define S_CONSTANT_32 0x1002
#define S_UDT_32 0x1003
#define S_COBOLUDT_32 0x1004
#define S_MANYREG_32 0x1005
#define S_BPREL_32 0x1006
#define S_LDATA_32 0x1007
#define S_GDATA_32 0x1008
#define S_PUB_32 0x1009
#define S_LPROC_32 0x100a
#define S_GPROC_32 0x100b
#define S_VFTTABLE_32 0x100c
#define S_REGREL_32 0x100d
#define S_LTHREAD_32 0x100e
#define S_GTHREAD_32 0x100f
/*
* This covers the basic datatypes that VC++ seems to be using these days.
* 32 bit mode only. There are additional numbers for the pointers in 16
* bit mode. There are many other types listed in the documents, but these
* are apparently not used by the compiler, or represent pointer types
* that are not used.
*/
#define T_NOTYPE 0x0000 /* Notype */
#define T_ABS 0x0001 /* Abs */
#define T_VOID 0x0003 /* Void */
#define T_CHAR 0x0010 /* signed char */
#define T_SHORT 0x0011 /* short */
#define T_LONG 0x0012 /* long */
#define T_QUAD 0x0013 /* long long */
#define T_UCHAR 0x0020 /* unsigned char */
#define T_USHORT 0x0021 /* unsigned short */
#define T_ULONG 0x0022 /* unsigned long */
#define T_UQUAD 0x0023 /* unsigned long long */
#define T_REAL32 0x0040 /* float */
#define T_REAL64 0x0041 /* double */
#define T_RCHAR 0x0070 /* real char */
#define T_WCHAR 0x0071 /* wide char */
#define T_INT4 0x0074 /* int */
#define T_UINT4 0x0075 /* unsigned int */
#define T_32PVOID 0x0403 /* 32 bit near pointer to void */
#define T_32PCHAR 0x0410 /* 16:32 near pointer to signed char */
#define T_32PSHORT 0x0411 /* 16:32 near pointer to short */
#define T_32PLONG 0x0412 /* 16:32 near pointer to int */
#define T_32PQUAD 0x0413 /* 16:32 near pointer to long long */
#define T_32PUCHAR 0x0420 /* 16:32 near pointer to unsigned char */
#define T_32PUSHORT 0x0421 /* 16:32 near pointer to unsigned short */
#define T_32PULONG 0x0422 /* 16:32 near pointer to unsigned int */
#define T_32PUQUAD 0x0423 /* 16:32 near pointer to long long */
#define T_32PREAL32 0x0440 /* 16:32 near pointer to float */
#define T_32PREAL64 0x0441 /* 16:32 near pointer to float */
#define T_32PRCHAR 0x0470 /* 16:32 near pointer to real char */
#define T_32PWCHAR 0x0471 /* 16:32 near pointer to real char */
#define T_32PINT4 0x0474 /* 16:32 near pointer to int */
#define T_32PUINT4 0x0475 /* 16:32 near pointer to unsigned int */
#define LF_MODIFIER 0x0001
#define LF_POINTER 0x0002
#define LF_ARRAY 0x0003
#define LF_CLASS 0x0004
#define LF_STRUCTURE 0x0005
#define LF_UNION 0x0006
#define LF_ENUM 0x0007
#define LF_PROCEDURE 0x0008
#define LF_MFUNCTION 0x0009
#define LF_VTSHAPE 0x000a
#define LF_COBOL0 0x000b
#define LF_COBOL1 0x000c
#define LF_BARRAY 0x000d
#define LF_LABEL 0x000e
#define LF_NULL 0x000f
#define LF_NOTTRAN 0x0010
#define LF_DIMARRAY 0x0011
#define LF_VFTPATH 0x0012
#define LF_PRECOMP 0x0013
#define LF_ENDPRECOMP 0x0014
#define LF_OEM 0x0015
#define LF_TYPESERVER 0x0016
#define LF_MODIFIER_32 0x1001 /* variants with new 32-bit type indices */
#define LF_POINTER_32 0x1002
#define LF_ARRAY_32 0x1003
#define LF_CLASS_32 0x1004
#define LF_STRUCTURE_32 0x1005
#define LF_UNION_32 0x1006
#define LF_ENUM_32 0x1007
#define LF_PROCEDURE_32 0x1008
#define LF_MFUNCTION_32 0x1009
#define LF_COBOL0_32 0x100a
#define LF_BARRAY_32 0x100b
#define LF_DIMARRAY_32 0x100c
#define LF_VFTPATH_32 0x100d
#define LF_PRECOMP_32 0x100e
#define LF_OEM_32 0x100f
#define LF_SKIP 0x0200
#define LF_ARGLIST 0x0201
#define LF_DEFARG 0x0202
#define LF_LIST 0x0203
#define LF_FIELDLIST 0x0204
#define LF_DERIVED 0x0205
#define LF_BITFIELD 0x0206
#define LF_METHODLIST 0x0207
#define LF_DIMCONU 0x0208
#define LF_DIMCONLU 0x0209
#define LF_DIMVARU 0x020a
#define LF_DIMVARLU 0x020b
#define LF_REFSYM 0x020c
#define LF_SKIP_32 0x1200 /* variants with new 32-bit type indices */
#define LF_ARGLIST_32 0x1201
#define LF_DEFARG_32 0x1202
#define LF_FIELDLIST_32 0x1203
#define LF_DERIVED_32 0x1204
#define LF_BITFIELD_32 0x1205
#define LF_METHODLIST_32 0x1206
#define LF_DIMCONU_32 0x1207
#define LF_DIMCONLU_32 0x1208
#define LF_DIMVARU_32 0x1209
#define LF_DIMVARLU_32 0x120a
#define LF_BCLASS 0x0400
#define LF_VBCLASS 0x0401
#define LF_IVBCLASS 0x0402
#define LF_ENUMERATE 0x0403
#define LF_FRIENDFCN 0x0404
#define LF_INDEX 0x0405
#define LF_MEMBER 0x0406
#define LF_STMEMBER 0x0407
#define LF_METHOD 0x0408
#define LF_NESTTYPE 0x0409
#define LF_VFUNCTAB 0x040a
#define LF_FRIENDCLS 0x040b
#define LF_ONEMETHOD 0x040c
#define LF_VFUNCOFF 0x040d
#define LF_NESTTYPEEX 0x040e
#define LF_MEMBERMODIFY 0x040f
#define LF_BCLASS_32 0x1400 /* variants with new 32-bit type indices */
#define LF_VBCLASS_32 0x1401
#define LF_IVBCLASS_32 0x1402
#define LF_FRIENDFCN_32 0x1403
#define LF_INDEX_32 0x1404
#define LF_MEMBER_32 0x1405
#define LF_STMEMBER_32 0x1406
#define LF_METHOD_32 0x1407
#define LF_NESTTYPE_32 0x1408
#define LF_VFUNCTAB_32 0x1409
#define LF_FRIENDCLS_32 0x140a
#define LF_ONEMETHOD_32 0x140b
#define LF_VFUNCOFF_32 0x140c
#define LF_NESTTYPEEX_32 0x140d
#define MAX_BUILTIN_TYPES 0x480
static struct datatype * cv_basic_types[MAX_BUILTIN_TYPES];
static int num_cv_defined_types = 0;
static struct datatype **cv_defined_types = NULL;
/*
* For the type CODEVIEW debug directory entries, the debug directory
* points to a structure like this. The cv_name field is the name
* of an external .PDB file.
*/
struct CodeViewDebug
{
char cv_nbtype[8];
unsigned int cv_timestamp;
char cv_unknown[4];
char cv_name[1];
};
struct MiscDebug {
unsigned int DataType;
unsigned int Length;
char Unicode;
char Reserved[3];
char Data[1];
};
/*
* This is the header that the COFF variety of debug header points to.
*/
struct CoffDebug {
unsigned int N_Sym;
unsigned int SymbolOffset;
unsigned int N_Linenum;
unsigned int LinenumberOffset;
unsigned int Unused[4];
};
struct CoffLinenum {
unsigned int VirtualAddr;
unsigned short int Linenum;
};
struct CoffFiles {
unsigned int startaddr;
unsigned int endaddr;
char * filename;
int linetab_offset;
int linecnt;
struct name_hash **entries;
int neps;
int neps_alloc;
};
struct CoffSymbol {
union {
char ShortName[8];
struct {
unsigned int NotLong;
unsigned int StrTaboff;
} Name;
} N;
unsigned int Value;
short SectionNumber;
short Type;
char StorageClass;
unsigned char NumberOfAuxSymbols;
};
struct CoffAuxSection{
unsigned int Length;
unsigned short NumberOfRelocations;
unsigned short NumberOfLinenumbers;
unsigned int CheckSum;
short Number;
char Selection;
} Section;
/*
* These two structures are used in the directory within a .DBG file
* to locate the individual important bits that we might want to see.
*/
struct CV4_DirHead {
short unsigned int dhsize;
short unsigned int desize;
unsigned int ndir;
unsigned int next_offset;
unsigned int flags;
};
struct CV4_DirEnt {
short unsigned int subsect_number;
short unsigned int module_number;
unsigned int offset;
unsigned int size;
};
/*
* These are the values of interest that the subsect_number field takes.
*/
#define sstAlignSym 0x125
#define sstSrcModule 0x127
struct codeview_linetab_hdr
{
unsigned int nline;
unsigned int segno;
unsigned int start;
unsigned int end;
char * sourcefile;
unsigned short * linetab;
unsigned int * offtab;
};
/*
* A simple macro that tells us whether a given COFF symbol is a
* function or not.
*/
#define N_TMASK 0x0030
#define IMAGE_SYM_DTYPE_FUNCTION 2
#define N_BTSHFT 4
#define ISFCN(x) (((x) & N_TMASK) == (IMAGE_SYM_DTYPE_FUNCTION << N_BTSHFT))
/*
* This is what we are looking for in the COFF symbols.
*/
#define IMAGE_SYM_CLASS_EXTERNAL 0x2
#define IMAGE_SYM_CLASS_STATIC 0x3
#define IMAGE_SYM_CLASS_FILE 0x67
static
struct datatype * DEBUG_GetCVType(unsigned int typeno)
{
struct datatype * dt = NULL;
/*
* Convert Codeview type numbers into something we can grok internally.
* Numbers < 0x1000 are all fixed builtin types. Numbers from 0x1000 and
* up are all user defined (structs, etc).
*/
if( typeno < 0x1000 )
{
if( typeno < MAX_BUILTIN_TYPES )
{
dt = cv_basic_types[typeno];
}
}
else
{
if( typeno - 0x1000 < num_cv_defined_types )
{
dt = cv_defined_types[typeno - 0x1000];
}
}
return dt;
}
static int
DEBUG_ParseTypeTable(char * table, int len)
{
int arr_max;
int curr_type;
enum debug_type fieldtype;
int elem_size;
union any_size ptr;
union any_size ptr2;
struct datatype * subtype;
char symname[256];
union codeview_type * type;
union codeview_type * type2;
struct datatype * typeptr;
curr_type = 0x1000;
ptr.c = table;
while( ptr.c - table < len )
{
type = (union codeview_type *) ptr.c;
if( curr_type - 0x1000 >= num_cv_defined_types )
{
num_cv_defined_types += 0x100;
cv_defined_types = (struct datatype **) DBG_realloc(cv_defined_types,
num_cv_defined_types * sizeof(struct datatype *));
memset(cv_defined_types + num_cv_defined_types - 0x100,
0,
0x100 * sizeof(struct datatype *));
if( cv_defined_types == NULL )
{
return FALSE;
}
}
switch(type->generic.id)
{
case LF_POINTER:
cv_defined_types[curr_type - 0x1000] =
DEBUG_FindOrMakePointerType(DEBUG_GetCVType(type->pointer.datatype));
break;
case LF_POINTER_32:
cv_defined_types[curr_type - 0x1000] =
DEBUG_FindOrMakePointerType(DEBUG_GetCVType(type->pointer32.datatype));
break;
case LF_ARRAY:
if( type->array.arrlen >= 0x8000 )
{
/*
* This is a numeric leaf, I am too lazy to handle this right
* now.
*/
fprintf(stderr, "Ignoring large numberic leaf.\n");
break;
}
if( type->array.namelen != 0 )
{
memset(symname, 0, sizeof(symname));
memcpy(symname, type->array.name, type->array.namelen);
typeptr = DEBUG_NewDataType(DT_ARRAY, symname);
}
else
{
typeptr = DEBUG_NewDataType(DT_ARRAY, NULL);
}
cv_defined_types[curr_type - 0x1000] = typeptr;
subtype = DEBUG_GetCVType(type->array.elemtype);
if( (subtype == NULL)
|| (elem_size = DEBUG_GetObjectSize(subtype)) == 0 )
{
arr_max = 0;
}
else
{
arr_max = type->array.arrlen / DEBUG_GetObjectSize(subtype);
}
DEBUG_SetArrayParams(typeptr, 0, arr_max, subtype);
break;
case LF_ARRAY_32:
if( type->array32.arrlen >= 0x8000 )
{
/*
* This is a numeric leaf, I am too lazy to handle this right
* now.
*/
fprintf(stderr, "Ignoring large numberic leaf.\n");
break;
}
if( type->array32.namelen != 0 )
{
memset(symname, 0, sizeof(symname));
memcpy(symname, type->array32.name, type->array32.namelen);
typeptr = DEBUG_NewDataType(DT_ARRAY, symname);
}
else
{
typeptr = DEBUG_NewDataType(DT_ARRAY, NULL);
}
cv_defined_types[curr_type - 0x1000] = typeptr;
subtype = DEBUG_GetCVType(type->array32.elemtype);
if( (subtype == NULL)
|| (elem_size = DEBUG_GetObjectSize(subtype)) == 0 )
{
arr_max = 0;
}
else
{
arr_max = type->array32.arrlen / DEBUG_GetObjectSize(subtype);
}
DEBUG_SetArrayParams(typeptr, 0, arr_max, subtype);
break;
case LF_FIELDLIST:
/*
* This is where the basic list of fields is defined for
* structures and classes.
*
* First, we need to look ahead and see whether we are building
* a fieldlist for an enum or a struct.
*/
ptr2.i = ptr.i + 1;
type2 = (union codeview_type *) ptr2.c;
if( type2->member.id == LF_MEMBER )
{
typeptr = DEBUG_NewDataType(DT_STRUCT, NULL);
fieldtype = DT_STRUCT;
}
else if( type2->member.id == LF_ENUMERATE )
{
typeptr = DEBUG_NewDataType(DT_ENUM, NULL);
fieldtype = DT_ENUM;
}
else
{
break;
}
cv_defined_types[curr_type - 0x1000] = typeptr;
while( ptr2.c < (ptr.c + ((type->generic.len + 3) & ~3)) )
{
type2 = (union codeview_type *) ptr2.c;
if( type2->member.id == LF_MEMBER && fieldtype == DT_STRUCT )
{
memset(symname, 0, sizeof(symname));
memcpy(symname, type2->member.name, type2->member.namelen);
subtype = DEBUG_GetCVType(type2->member.type);
elem_size = 0;
if( subtype != NULL )
{
elem_size = DEBUG_GetObjectSize(subtype);
}
if( type2->member.offset >= 0x8000 )
{
/*
* This is a numeric leaf, I am too lazy to handle this right
* now.
*/
fprintf(stderr, "Ignoring large numberic leaf.\n");
}
else
{
DEBUG_AddStructElement(typeptr, symname, subtype,
type2->member.offset << 3,
elem_size << 3);
}
}
else if( type2->member.id == LF_ENUMERATE && fieldtype == DT_ENUM )
{
memset(symname, 0, sizeof(symname));
memcpy(symname, type2->enumerate.name, type2->enumerate.namelen);
if( type2->enumerate.value >= 0x8000 )
{
/*
* This is a numeric leaf, I am too lazy to handle this right
* now.
*/
fprintf(stderr, "Ignoring large numberic leaf.\n");
}
else
{
DEBUG_AddStructElement(typeptr, symname, NULL,
type2->enumerate.value, 0);
}
}
else
{
/*
* Something else I have never seen before. Either wrong type of
* object in the fieldlist, or some other problem which I wouldn't
* really know how to handle until it came up.
*/
fprintf(stderr, "Unexpected entry in fieldlist\n");
break;
}
ptr2.c += ((type2->member.namelen + 9 + 3) & ~3);
}
break;
case LF_FIELDLIST_32:
/*
* This is where the basic list of fields is defined for
* structures and classes.
*
* First, we need to look ahead and see whether we are building
* a fieldlist for an enum or a struct.
*/
ptr2.i = ptr.i + 1;
type2 = (union codeview_type *) ptr2.c;
if( type2->member32.id == LF_MEMBER_32 )
{
typeptr = DEBUG_NewDataType(DT_STRUCT, NULL);
fieldtype = DT_STRUCT;
}
else if( type2->member32.id == LF_ENUMERATE )
{
typeptr = DEBUG_NewDataType(DT_ENUM, NULL);
fieldtype = DT_ENUM;
}
else
{
break;
}
cv_defined_types[curr_type - 0x1000] = typeptr;
while( ptr2.c < (ptr.c + ((type->generic.len + 3) & ~3)) )
{
type2 = (union codeview_type *) ptr2.c;
if( type2->member.id == LF_MEMBER_32 && fieldtype == DT_STRUCT )
{
memset(symname, 0, sizeof(symname));
memcpy(symname, type2->member32.name, type2->member32.namelen);
subtype = DEBUG_GetCVType(type2->member32.type);
elem_size = 0;
if( subtype != NULL )
{
elem_size = DEBUG_GetObjectSize(subtype);
}
if( type2->member32.offset >= 0x8000 )
{
/*
* This is a numeric leaf, I am too lazy to handle this right
* now.
*/
fprintf(stderr, "Ignoring large numberic leaf.\n");
}
else
{
DEBUG_AddStructElement(typeptr, symname, subtype,
type2->member32.offset << 3,
elem_size << 3);
}
}
else if( type2->member32.id == LF_ENUMERATE && fieldtype == DT_ENUM )
{
memset(symname, 0, sizeof(symname));
memcpy(symname, type2->enumerate.name, type2->enumerate.namelen);
if( type2->enumerate.value >= 0x8000 )
{
/*
* This is a numeric leaf, I am too lazy to handle this right
* now.
*/
fprintf(stderr, "Ignoring large numberic leaf.\n");
}
else
{
DEBUG_AddStructElement(typeptr, symname, NULL,
type2->enumerate.value, 0);
}
}
else
{
/*
* Something else I have never seen before. Either wrong type of
* object in the fieldlist, or some other problem which I wouldn't
* really know how to handle until it came up.
*/
fprintf(stderr, "Unexpected entry in fieldlist\n");
break;
}
ptr2.c += ((type2->member32.namelen + 9 + 3) & ~3);
}
break;
case LF_STRUCTURE:
case LF_CLASS:
if( type->structure.structlen >= 0x8000 )
{
/*
* This is a numeric leaf, I am too lazy to handle this right
* now.
*/
fprintf(stderr, "Ignoring large numberic leaf.\n");
break;
}
memset(symname, 0, sizeof(symname));
memcpy(symname, type->structure.name, type->structure.namelen);
if( strcmp(symname, "__unnamed") == 0 )
{
typeptr = DEBUG_NewDataType(DT_STRUCT, NULL);
}
else
{
typeptr = DEBUG_NewDataType(DT_STRUCT, symname);
}
cv_defined_types[curr_type - 0x1000] = typeptr;
/*
* Now copy the relevant bits from the fieldlist that we specified.
*/
subtype = DEBUG_GetCVType(type->structure.fieldlist);
if( subtype != NULL )
{
DEBUG_SetStructSize(typeptr, type->structure.structlen);
DEBUG_CopyFieldlist(typeptr, subtype);
}
break;
case LF_STRUCTURE_32:
case LF_CLASS_32:
if( type->structure32.structlen >= 0x8000 )
{
/*
* This is a numeric leaf, I am too lazy to handle this right
* now.
*/
fprintf(stderr, "Ignoring large numberic leaf.\n");
break;
}
memset(symname, 0, sizeof(symname));
memcpy(symname, type->structure32.name, type->structure32.namelen);
if( strcmp(symname, "__unnamed") == 0 )
{
typeptr = DEBUG_NewDataType(DT_STRUCT, NULL);
}
else
{
typeptr = DEBUG_NewDataType(DT_STRUCT, symname);
}
cv_defined_types[curr_type - 0x1000] = typeptr;
/*
* Now copy the relevant bits from the fieldlist that we specified.
*/
subtype = DEBUG_GetCVType(type->structure32.fieldlist);
if( subtype != NULL )
{
DEBUG_SetStructSize(typeptr, type->structure32.structlen);
DEBUG_CopyFieldlist(typeptr, subtype);
}
break;
case LF_UNION:
if( type->t_union.un_len >= 0x8000 )
{
/*
* This is a numeric leaf, I am too lazy to handle this right
* now.
*/
fprintf(stderr, "Ignoring large numberic leaf.\n");
break;
}
memset(symname, 0, sizeof(symname));
memcpy(symname, type->t_union.name, type->t_union.namelen);
if( strcmp(symname, "__unnamed") == 0 )
{
typeptr = DEBUG_NewDataType(DT_STRUCT, NULL);
}
else
{
typeptr = DEBUG_NewDataType(DT_STRUCT, symname);
}
cv_defined_types[curr_type - 0x1000] = typeptr;
/*
* Now copy the relevant bits from the fieldlist that we specified.
*/
subtype = DEBUG_GetCVType(type->t_union.field);
if( subtype != NULL )
{
DEBUG_SetStructSize(typeptr, type->t_union.un_len);
DEBUG_CopyFieldlist(typeptr, subtype);
}
break;
case LF_UNION_32:
if( type->t_union32.un_len >= 0x8000 )
{
/*
* This is a numeric leaf, I am too lazy to handle this right
* now.
*/
fprintf(stderr, "Ignoring large numberic leaf.\n");
break;
}
memset(symname, 0, sizeof(symname));
memcpy(symname, type->t_union32.name, type->t_union32.namelen);
if( strcmp(symname, "__unnamed") == 0 )
{
typeptr = DEBUG_NewDataType(DT_STRUCT, NULL);
}
else
{
typeptr = DEBUG_NewDataType(DT_STRUCT, symname);
}
cv_defined_types[curr_type - 0x1000] = typeptr;
/*
* Now copy the relevant bits from the fieldlist that we specified.
*/
subtype = DEBUG_GetCVType(type->t_union32.field);
if( subtype != NULL )
{
DEBUG_SetStructSize(typeptr, type->t_union32.un_len);
DEBUG_CopyFieldlist(typeptr, subtype);
}
break;
case LF_BITFIELD:
typeptr = DEBUG_NewDataType(DT_BITFIELD, NULL);
cv_defined_types[curr_type - 0x1000] = typeptr;
DEBUG_SetBitfieldParams(typeptr, type->bitfield.bitoff,
type->bitfield.nbits,
DEBUG_GetCVType(type->bitfield.type));
break;
case LF_BITFIELD_32:
typeptr = DEBUG_NewDataType(DT_BITFIELD, NULL);
cv_defined_types[curr_type - 0x1000] = typeptr;
DEBUG_SetBitfieldParams(typeptr, type->bitfield32.bitoff,
type->bitfield32.nbits,
DEBUG_GetCVType(type->bitfield32.type));
break;
case LF_ENUM:
memset(symname, 0, sizeof(symname));
memcpy(symname, type->enumeration.name, type->enumeration.namelen);
typeptr = DEBUG_NewDataType(DT_ENUM, symname);
cv_defined_types[curr_type - 0x1000] = typeptr;
/*
* Now copy the relevant bits from the fieldlist that we specified.
*/
subtype = DEBUG_GetCVType(type->enumeration.field);
if( subtype != NULL )
{
DEBUG_CopyFieldlist(typeptr, subtype);
}
break;
case LF_ENUM_32:
memset(symname, 0, sizeof(symname));
memcpy(symname, type->enumeration32.name, type->enumeration32.namelen);
typeptr = DEBUG_NewDataType(DT_ENUM, symname);
cv_defined_types[curr_type - 0x1000] = typeptr;
/*
* Now copy the relevant bits from the fieldlist that we specified.
*/
subtype = DEBUG_GetCVType(type->enumeration32.field);
if( subtype != NULL )
{
DEBUG_CopyFieldlist(typeptr, subtype);
}
break;
default:
break;
}
curr_type++;
ptr.c += (type->generic.len + 3) & ~3;
}
return TRUE;
}
void
DEBUG_InitCVDataTypes(void)
{
/*
* These are the common builtin types that are used by VC++.
*/
cv_basic_types[T_NOTYPE] = NULL;
cv_basic_types[T_ABS] = NULL;
cv_basic_types[T_VOID] = DEBUG_NewDataType(DT_BASIC, "void");
cv_basic_types[T_CHAR] = DEBUG_NewDataType(DT_BASIC, "char");
cv_basic_types[T_SHORT] = DEBUG_NewDataType(DT_BASIC, "short int");
cv_basic_types[T_LONG] = DEBUG_NewDataType(DT_BASIC, "long int");
cv_basic_types[T_QUAD] = DEBUG_NewDataType(DT_BASIC, "long long int");
cv_basic_types[T_UCHAR] = DEBUG_NewDataType(DT_BASIC, "unsigned char");
cv_basic_types[T_USHORT] = DEBUG_NewDataType(DT_BASIC, "short unsigned int");
cv_basic_types[T_ULONG] = DEBUG_NewDataType(DT_BASIC, "long unsigned int");
cv_basic_types[T_UQUAD] = DEBUG_NewDataType(DT_BASIC, "long long unsigned int");
cv_basic_types[T_REAL32] = DEBUG_NewDataType(DT_BASIC, "float");
cv_basic_types[T_REAL64] = DEBUG_NewDataType(DT_BASIC, "double");
cv_basic_types[T_RCHAR] = DEBUG_NewDataType(DT_BASIC, "char");
cv_basic_types[T_WCHAR] = DEBUG_NewDataType(DT_BASIC, "short");
cv_basic_types[T_INT4] = DEBUG_NewDataType(DT_BASIC, "int");
cv_basic_types[T_UINT4] = DEBUG_NewDataType(DT_BASIC, "unsigned int");
cv_basic_types[T_32PVOID] = DEBUG_FindOrMakePointerType(cv_basic_types[T_VOID]);
cv_basic_types[T_32PCHAR] = DEBUG_FindOrMakePointerType(cv_basic_types[T_CHAR]);
cv_basic_types[T_32PSHORT] = DEBUG_FindOrMakePointerType(cv_basic_types[T_SHORT]);
cv_basic_types[T_32PLONG] = DEBUG_FindOrMakePointerType(cv_basic_types[T_LONG]);
cv_basic_types[T_32PQUAD] = DEBUG_FindOrMakePointerType(cv_basic_types[T_QUAD]);
cv_basic_types[T_32PUCHAR] = DEBUG_FindOrMakePointerType(cv_basic_types[T_UCHAR]);
cv_basic_types[T_32PUSHORT] = DEBUG_FindOrMakePointerType(cv_basic_types[T_USHORT]);
cv_basic_types[T_32PULONG] = DEBUG_FindOrMakePointerType(cv_basic_types[T_ULONG]);
cv_basic_types[T_32PUQUAD] = DEBUG_FindOrMakePointerType(cv_basic_types[T_UQUAD]);
cv_basic_types[T_32PREAL32] = DEBUG_FindOrMakePointerType(cv_basic_types[T_REAL32]);
cv_basic_types[T_32PREAL64] = DEBUG_FindOrMakePointerType(cv_basic_types[T_REAL64]);
cv_basic_types[T_32PRCHAR] = DEBUG_FindOrMakePointerType(cv_basic_types[T_RCHAR]);
cv_basic_types[T_32PWCHAR] = DEBUG_FindOrMakePointerType(cv_basic_types[T_WCHAR]);
cv_basic_types[T_32PINT4] = DEBUG_FindOrMakePointerType(cv_basic_types[T_INT4]);
cv_basic_types[T_32PUINT4] = DEBUG_FindOrMakePointerType(cv_basic_types[T_UINT4]);
}
/*
* In this function, we keep track of deferred debugging information
* that we may need later if we were to need to use the internal debugger.
* We don't fully process it here for performance reasons.
*/
int
DEBUG_RegisterMSCDebugInfo(DBG_MODULE* module, void* _nth, unsigned long nth_ofs)
{
int has_codeview = FALSE;
int rtn = FALSE;
IMAGE_DEBUG_DIRECTORY dbg;
u_long v_addr, size, orig_size;
PIMAGE_NT_HEADERS nth = (PIMAGE_NT_HEADERS)_nth;
orig_size = nth->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_DEBUG].Size;
if (orig_size) {
v_addr = nth->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_DEBUG].VirtualAddress;
for(size = orig_size; size >= sizeof(dbg); size -= sizeof(dbg))
{
if (!DEBUG_READ_MEM_VERBOSE((void*)((char *) module->load_addr + v_addr), &dbg, sizeof(dbg))) continue;
switch(dbg.Type)
{
case IMAGE_DEBUG_TYPE_CODEVIEW:
case IMAGE_DEBUG_TYPE_MISC:
has_codeview = TRUE;
break;
}
v_addr += sizeof(dbg);
}
v_addr = nth->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_DEBUG].VirtualAddress;
for(size = orig_size; size >= sizeof(dbg); size -= sizeof(dbg))
{
if (!DEBUG_READ_MEM_VERBOSE((void*)((char *)module->load_addr + v_addr), &dbg, sizeof(dbg))) continue;
switch(dbg.Type)
{
case IMAGE_DEBUG_TYPE_COFF:
/*
* If we have both codeview and COFF debug info, ignore the
* coff debug info as it would just confuse us, and it is
* less complete.
*
* FIXME - this is broken - if we cannot find the PDB file, then
* we end up with no debugging info at all. In this case, we
* should use the COFF info as a backup.
*/
if( has_codeview )
{
break;
}
case IMAGE_DEBUG_TYPE_CODEVIEW:
case IMAGE_DEBUG_TYPE_MISC:
/*
* This is usually an indirection to a .DBG file.
* This is similar to (but a slightly older format) from the
* PDB file.
*
* First check to see if the image was 'stripped'. If so, it
* means that this entry points to a .DBG file. Otherwise,
* it just points to itself, and we can ignore this.
*/
if( (dbg.Type != IMAGE_DEBUG_TYPE_MISC) ||
(nth->FileHeader.Characteristics & IMAGE_FILE_DEBUG_STRIPPED) != 0 )
{
char fn[PATH_MAX];
int fd = -1;
DOS_FULL_NAME full_name;
char* dbg_info;
/*
* Read the important bits. What we do after this depends
* upon the type, but this is always enough so we are able
* to proceed if we know what we need to do next.
*/
/* basically, the PE loader maps all sections (data, resources...), but doesn't map
* the DataDirectory array's content. One its entry contains the *beloved*
* debug information. (Note the DataDirectory is mapped, not its content)
*/
/* FIXME: the module->handle value is not usable in the debugger's process */
if (GetModuleFileNameA(module->handle, fn, sizeof(fn)) > 0 &&
DOSFS_GetFullName(fn, TRUE, &full_name) &&
(fd = open(full_name.long_name, O_RDONLY)) > 0)
{
dbg_info = mmap(NULL, dbg.SizeOfData,
PROT_READ, MAP_PRIVATE, fd, dbg.PointerToRawData);
close(fd);
if( dbg_info == (char *) 0xffffffff ) break;
}
else
{
fprintf(stderr, " (not mapped: fn='%s', lfn='%s', fd=%d)\n", fn, full_name.long_name, fd);
break;
}
if (!(module->extra_info = DBG_alloc(sizeof(MSC_DBG_INFO))))
break;
MSC_INFO(module)->dbg_info = dbg_info;
MSC_INFO(module)->dbg_size = dbg.SizeOfData;
MSC_INFO(module)->dbgdir = dbg;
MSC_INFO(module)->sect_ofs = nth_ofs + OFFSET_OF(IMAGE_NT_HEADERS, OptionalHeader) +
nth->FileHeader.SizeOfOptionalHeader;
MSC_INFO(module)->nsect = nth->FileHeader.NumberOfSections;
}
break;
#if 0
default:
#endif
}
v_addr += sizeof(dbg);
}
DEBUG_CurrProcess->next_index++;
}
return rtn;
}
/* look for stabs information in PE header (it's how mingw compiler provides its
* debugging information
*/
int DEBUG_RegisterStabsDebugInfo(DBG_MODULE* module, void* _nth, unsigned long nth_ofs)
{
IMAGE_SECTION_HEADER pe_seg;
unsigned long pe_seg_ofs;
int i, stabsize = 0, stabstrsize = 0;
unsigned int stabs = 0, stabstr = 0;
char bufstr[256];
PIMAGE_NT_HEADERS nth = (PIMAGE_NT_HEADERS)_nth;
pe_seg_ofs = nth_ofs + OFFSET_OF(IMAGE_NT_HEADERS, OptionalHeader) +
nth->FileHeader.SizeOfOptionalHeader;
for (i = 0; i < nth->FileHeader.NumberOfSections; i++, pe_seg_ofs += sizeof(pe_seg)) {
if (!DEBUG_READ_MEM_VERBOSE((void*)((char *)module->load_addr + pe_seg_ofs),
&pe_seg, sizeof(pe_seg)) ||
!DEBUG_READ_MEM_VERBOSE((void*)pe_seg.Name, bufstr, sizeof(bufstr)))
{fprintf(stderr, "err3\n");continue;}
bufstr[sizeof(bufstr) - 1] = 0;
if (!strcasecmp(bufstr, ".stab")) {
stabs = pe_seg.VirtualAddress;
stabsize = pe_seg.SizeOfRawData;
} else if (!strncasecmp(bufstr, ".stabstr", 8)) {
stabstr = pe_seg.VirtualAddress;
stabstrsize = pe_seg.SizeOfRawData;
}
}
if (stabstrsize && stabsize) {
#ifdef _WE_SUPPORT_THE_STAB_TYPES_USED_BY_MINGW_TOO
/* Won't work currently, since MINGW32 uses some special typedefs
* which we do not handle yet. Support for them is a bit difficult.
*/
/* FIXME: load_addr is in a different address space... */
DEBUG_ParseStabs(module->load_addr, 0, stabs, stabsize, stabstr, stabstrsize);
#endif
fprintf(stderr,"(stabs not loaded)");
}
return TRUE;
}
/*
* Process COFF debugging information embedded in a Win32 application.
*
*/
static
int
DEBUG_ProcessCoff(DBG_MODULE* module)
{
struct CoffAuxSection * aux;
struct CoffDebug * coff;
struct CoffFiles * coff_files = NULL;
struct CoffLinenum * coff_linetab;
char * coff_strtab;
struct CoffSymbol * coff_sym;
struct CoffSymbol * coff_symbol;
struct CoffFiles * curr_file = NULL;
int i;
int j;
int k;
struct CoffLinenum * linepnt;
int linetab_indx;
char namebuff[9];
char * nampnt;
int naux;
DBG_VALUE new_value;
int nfiles = 0;
int nfiles_alloc = 0;
struct CoffFiles orig_file;
int rtn = FALSE;
char * this_file = NULL;
coff = (struct CoffDebug *) MSC_INFO(module)->dbg_info;
coff_symbol = (struct CoffSymbol *) ((unsigned int) coff + coff->SymbolOffset);
coff_linetab = (struct CoffLinenum *) ((unsigned int) coff + coff->LinenumberOffset);
coff_strtab = (char *) ((unsigned int) coff_symbol + 18*coff->N_Sym);
linetab_indx = 0;
new_value.cookie = DV_TARGET;
new_value.type = NULL;
for(i=0; i < coff->N_Sym; i++ )
{
/*
* We do this because some compilers (i.e. gcc) incorrectly
* pad the structure up to a 4 byte boundary. The structure
* is really only 18 bytes long, so we have to manually make sure
* we get it right.
*
* FIXME - there must be a way to have autoconf figure out the
* correct compiler option for this. If it is always gcc, that
* makes life simpler, but I don't want to force this.
*/
coff_sym = (struct CoffSymbol *) ((unsigned int) coff_symbol + 18*i);
naux = coff_sym->NumberOfAuxSymbols;
if( coff_sym->StorageClass == IMAGE_SYM_CLASS_FILE )
{
if( nfiles + 1 >= nfiles_alloc )
{
nfiles_alloc += 10;
coff_files = (struct CoffFiles *) DBG_realloc(coff_files,
nfiles_alloc * sizeof(struct CoffFiles));
}
curr_file = coff_files + nfiles;
nfiles++;
curr_file->startaddr = 0xffffffff;
curr_file->endaddr = 0;
curr_file->filename = ((char *) coff_sym) + 18;
curr_file->linetab_offset = -1;
curr_file->linecnt = 0;
curr_file->entries = NULL;
curr_file->neps = curr_file->neps_alloc = 0;
#if 0
fprintf(stderr,"New file %s\n", curr_file->filename);
#endif
i += naux;
continue;
}
/*
* This guy marks the size and location of the text section
* for the current file. We need to keep track of this so
* we can figure out what file the different global functions
* go with.
*/
if( (coff_sym->StorageClass == IMAGE_SYM_CLASS_STATIC)
&& (naux != 0)
&& (coff_sym->Type == 0)
&& (coff_sym->SectionNumber == 1) )
{
aux = (struct CoffAuxSection *) ((unsigned int) coff_sym + 18);
if( curr_file->linetab_offset != -1 )
{
#if 0
fprintf(stderr, "Duplicating sect from %s: %x %x %x %d %d\n",
curr_file->filename,
aux->Length,
aux->NumberOfRelocations,
aux->NumberOfLinenumbers,
aux->Number,
aux->Selection);
fprintf(stderr, "More sect %d %x %d %d %d\n",
coff_sym->SectionNumber,
coff_sym->Value,
coff_sym->Type,
coff_sym->StorageClass,
coff_sym->NumberOfAuxSymbols);
#endif
/*
* Save this so we can copy bits from it.
*/
orig_file = *curr_file;
/*
* Duplicate the file entry. We have no way to describe
* multiple text sections in our current way of handling things.
*/
if( nfiles + 1 >= nfiles_alloc )
{
nfiles_alloc += 10;
coff_files = (struct CoffFiles *) DBG_realloc(coff_files,
nfiles_alloc * sizeof(struct CoffFiles));
}
curr_file = coff_files + nfiles;
nfiles++;
curr_file->startaddr = 0xffffffff;
curr_file->endaddr = 0;
curr_file->filename = orig_file.filename;
curr_file->linetab_offset = -1;
curr_file->linecnt = 0;
curr_file->entries = NULL;
curr_file->neps = curr_file->neps_alloc = 0;
}
#if 0
else
{
fprintf(stderr, "New text sect from %s: %x %x %x %d %d\n",
curr_file->filename,
aux->Length,
aux->NumberOfRelocations,
aux->NumberOfLinenumbers,
aux->Number,
aux->Selection);
}
#endif
if( curr_file->startaddr > coff_sym->Value )
{
curr_file->startaddr = coff_sym->Value;
}
if( curr_file->startaddr > coff_sym->Value )
{
curr_file->startaddr = coff_sym->Value;
}
if( curr_file->endaddr < coff_sym->Value + aux->Length )
{
curr_file->endaddr = coff_sym->Value + aux->Length;
}
curr_file->linetab_offset = linetab_indx;
curr_file->linecnt = aux->NumberOfLinenumbers;
linetab_indx += aux->NumberOfLinenumbers;
i += naux;
continue;
}
if( (coff_sym->StorageClass == IMAGE_SYM_CLASS_STATIC)
&& (naux == 0)
&& (coff_sym->SectionNumber == 1) )
{
/*
* This is a normal static function when naux == 0.
* Just register it. The current file is the correct
* one in this instance.
*/
if( coff_sym->N.Name.NotLong )
{
memcpy(namebuff, coff_sym->N.ShortName, 8);
namebuff[8] = '\0';
nampnt = &namebuff[0];
}
else
{
nampnt = coff_strtab + coff_sym->N.Name.StrTaboff;
}
if( nampnt[0] == '_' )
{
nampnt++;
}
new_value.addr.seg = 0;
new_value.addr.off = (int) ((char *)module->load_addr + coff_sym->Value);
if( curr_file->neps + 1 >= curr_file->neps_alloc )
{
curr_file->neps_alloc += 10;
curr_file->entries = (struct name_hash **)
DBG_realloc(curr_file->entries,
curr_file->neps_alloc * sizeof(struct name_hash *));
}
#if 0
fprintf(stderr,"\tAdding static symbol %s\n", nampnt);
#endif
curr_file->entries[curr_file->neps++] =
DEBUG_AddSymbol( nampnt, &new_value, this_file, SYM_WIN32 );
i += naux;
continue;
}
if( (coff_sym->StorageClass == IMAGE_SYM_CLASS_EXTERNAL)
&& ISFCN(coff_sym->Type)
&& (coff_sym->SectionNumber > 0) )
{
if( coff_sym->N.Name.NotLong )
{
memcpy(namebuff, coff_sym->N.ShortName, 8);
namebuff[8] = '\0';
nampnt = &namebuff[0];
}
else
{
nampnt = coff_strtab + coff_sym->N.Name.StrTaboff;
}
if( nampnt[0] == '_' )
{
nampnt++;
}
new_value.addr.seg = 0;
new_value.addr.off = (int) ((char *)module->load_addr + coff_sym->Value);
#if 0
fprintf(stderr, "%d: %x %s\n", i, new_value.addr.off, nampnt);
fprintf(stderr,"\tAdding global symbol %s\n", nampnt);
#endif
/*
* Now we need to figure out which file this guy belongs to.
*/
this_file = NULL;
for(j=0; j < nfiles; j++)
{
if( coff_files[j].startaddr <= coff_sym->Value
&& coff_files[j].endaddr > coff_sym->Value )
{
this_file = coff_files[j].filename;
break;
}
}
if( coff_files[j].neps + 1 >= coff_files[j].neps_alloc )
{
coff_files[j].neps_alloc += 10;
coff_files[j].entries = (struct name_hash **)
DBG_realloc(coff_files[j].entries,
coff_files[j].neps_alloc * sizeof(struct name_hash *));
}
coff_files[j].entries[coff_files[j].neps++] =
DEBUG_AddSymbol( nampnt, &new_value, this_file, SYM_WIN32 );
i += naux;
continue;
}
if( (coff_sym->StorageClass == IMAGE_SYM_CLASS_EXTERNAL)
&& (coff_sym->SectionNumber > 0) )
{
/*
* Similar to above, but for the case of data symbols.
* These aren't treated as entrypoints.
*/
if( coff_sym->N.Name.NotLong )
{
memcpy(namebuff, coff_sym->N.ShortName, 8);
namebuff[8] = '\0';
nampnt = &namebuff[0];
}
else
{
nampnt = coff_strtab + coff_sym->N.Name.StrTaboff;
}
if( nampnt[0] == '_' )
{
nampnt++;
}
new_value.addr.seg = 0;
new_value.addr.off = (int) ((char *)module->load_addr + coff_sym->Value);
#if 0
fprintf(stderr, "%d: %x %s\n", i, new_value.addr.off, nampnt);
fprintf(stderr,"\tAdding global data symbol %s\n", nampnt);
#endif
/*
* Now we need to figure out which file this guy belongs to.
*/
DEBUG_AddSymbol( nampnt, &new_value, NULL, SYM_WIN32 );
i += naux;
continue;
}
if( (coff_sym->StorageClass == IMAGE_SYM_CLASS_STATIC)
&& (naux == 0) )
{
/*
* Ignore these. They don't have anything to do with
* reality.
*/
i += naux;
continue;
}
#if 0
fprintf(stderr,"Skipping unknown entry %d %d %d\n", coff_sym->StorageClass,
coff_sym->SectionNumber, naux);
#endif
/*
* For now, skip past the aux entries.
*/
i += naux;
}
/*
* OK, we now should have a list of files, and we should have a list
* of entrypoints. We need to sort the entrypoints so that we are
* able to tie the line numbers with the given functions within the
* file.
*/
if( coff_files != NULL )
{
for(j=0; j < nfiles; j++)
{
if( coff_files[j].entries != NULL )
{
qsort(coff_files[j].entries, coff_files[j].neps,
sizeof(struct name_hash *), DEBUG_cmp_sym);
}
}
/*
* Now pick apart the line number tables, and attach the entries
* to the given functions.
*/
for(j=0; j < nfiles; j++)
{
i = 0;
if( coff_files[j].neps != 0 )
for(k=0; k < coff_files[j].linecnt; k++)
{
/*
* Another monstrosity caused by the fact that we are using
* a 6 byte structure, and gcc wants to pad structures to 4 byte
* boundaries. Otherwise we could just index into an array.
*/
linepnt = (struct CoffLinenum *)
((unsigned int) coff_linetab +
6*(coff_files[j].linetab_offset + k));
/*
* If we have spilled onto the next entrypoint, then
* bump the counter..
*/
while(TRUE)
{
if (i+1 >= coff_files[j].neps) break;
DEBUG_GetSymbolAddr(coff_files[j].entries[i+1], &new_value.addr);
if( (((unsigned int)module->load_addr +
linepnt->VirtualAddr) >= new_value.addr.off) )
{
i++;
} else break;
}
/*
* Add the line number. This is always relative to the
* start of the function, so we need to subtract that offset
* first.
*/
DEBUG_GetSymbolAddr(coff_files[j].entries[i], &new_value.addr);
DEBUG_AddLineNumber(coff_files[j].entries[i],
linepnt->Linenum,
(unsigned int) module->load_addr
+ linepnt->VirtualAddr
- new_value.addr.off);
}
}
}
rtn = TRUE;
if( coff_files != NULL )
{
for(j=0; j < nfiles; j++)
{
if( coff_files[j].entries != NULL )
{
DBG_free(coff_files[j].entries);
}
}
DBG_free(coff_files);
}
return (rtn);
}
/*
* Process a codeview line number table. Digestify the thing so that
* we can easily reference the thing when we process the rest of
* the information.
*/
static struct codeview_linetab_hdr *
DEBUG_SnarfLinetab(char * linetab,
int size)
{
int file_segcount;
char filename[PATH_MAX];
unsigned int * filetab;
char * fn;
int i;
int k;
struct codeview_linetab_hdr * lt_hdr;
unsigned int * lt_ptr;
int nfile;
int nseg;
union any_size pnt;
union any_size pnt2;
struct startend * start;
int this_seg;
/*
* Now get the important bits.
*/
pnt.c = linetab;
nfile = *pnt.s++;
nseg = *pnt.s++;
filetab = (unsigned int *) pnt.c;
/*
* Now count up the number of segments in the file.
*/
nseg = 0;
for(i=0; i<nfile; i++)
{
pnt2.c = linetab + filetab[i];
nseg += *pnt2.s;
}
/*
* Next allocate the header we will be returning.
* There is one header for each segment, so that we can reach in
* and pull bits as required.
*/
lt_hdr = (struct codeview_linetab_hdr *)
DBG_alloc((nseg + 1) * sizeof(*lt_hdr));
if( lt_hdr == NULL )
{
goto leave;
}
memset(lt_hdr, 0, sizeof(*lt_hdr) * (nseg+1));
/*
* Now fill the header we will be returning, one for each segment.
* Note that this will basically just contain pointers into the existing
* line table, and we do not actually copy any additional information
* or allocate any additional memory.
*/
this_seg = 0;
for(i=0; i<nfile; i++)
{
/*
* Get the pointer into the segment information.
*/
pnt2.c = linetab + filetab[i];
file_segcount = *pnt2.s;
pnt2.ui++;
lt_ptr = (unsigned int *) pnt2.c;
start = (struct startend *) (lt_ptr + file_segcount);
/*
* Now snarf the filename for all of the segments for this file.
*/
fn = (unsigned char *) (start + file_segcount);
memset(filename, 0, sizeof(filename));
memcpy(filename, fn + 1, *fn);
fn = DBG_strdup(filename);
for(k = 0; k < file_segcount; k++, this_seg++)
{
pnt2.c = linetab + lt_ptr[k];
lt_hdr[this_seg].start = start[k].start;
lt_hdr[this_seg].end = start[k].end;
lt_hdr[this_seg].sourcefile = fn;
lt_hdr[this_seg].segno = *pnt2.s++;
lt_hdr[this_seg].nline = *pnt2.s++;
lt_hdr[this_seg].offtab = pnt2.ui;
lt_hdr[this_seg].linetab = (unsigned short *)
(pnt2.ui + lt_hdr[this_seg].nline);
}
}
leave:
return lt_hdr;
}
static int
DEBUG_SnarfCodeView( DBG_MODULE * module,
char * cv_data,
int size,
struct codeview_linetab_hdr * linetab)
{
struct name_hash * curr_func = NULL;
struct wine_locals * curr_sym = NULL;
int i;
int j;
int len;
DBG_VALUE new_value;
int nsect;
union any_size ptr;
IMAGE_SECTION_HEADER * sectp;
union codeview_symbol * sym;
char symname[PATH_MAX];
struct name_hash * thunk_sym = NULL;
ptr.c = cv_data;
nsect = MSC_INFO(module)->nsect;
sectp = DBG_alloc(sizeof(*sectp) * nsect);
if (!sectp ||
!DEBUG_READ_MEM_VERBOSE((char *)module->load_addr + MSC_INFO(module)->sect_ofs,
sectp, sizeof(*sectp) * nsect))
return FALSE;
/*
* Loop over the different types of records and whenever we
* find something we are interested in, record it and move on.
*/
while( ptr.c - cv_data < size )
{
sym = (union codeview_symbol *) ptr.c;
if( sym->generic.len - sizeof(int) == (ptr.c - cv_data) )
{
/*
* This happens when we have indirect symbols that VC++ 4.2
* sometimes uses when there isn't a line number table.
* We ignore it - we will process and enter all of the
* symbols in the global symbol table anyways, so there
* isn't much point in keeping track of all of this crap.
*/
break;
}
memset(symname, 0, sizeof(symname));
switch(sym->generic.id)
{
case S_GDATA:
case S_LDATA:
case S_PUB:
/*
* First, a couple of sanity checks.
*/
if( sym->data.namelen == 0 )
{
break;
}
if( sym->data.seg == 0 || sym->data.seg > nsect )
{
break;
}
/*
* Global and local data symbols. We don't associate these
* with any given source file.
*/
memcpy(symname, sym->data.name, sym->data.namelen);
new_value.addr.seg = 0;
new_value.type = DEBUG_GetCVType(sym->data.symtype);
new_value.addr.off = (unsigned int) module->load_addr +
sectp[sym->data.seg - 1].VirtualAddress +
sym->data.offset;
new_value.cookie = DV_TARGET;
DEBUG_AddSymbol( symname, &new_value, NULL, SYM_WIN32 | SYM_DATA );
break;
case S_GDATA_32:
case S_LDATA_32:
case S_PUB_32:
/*
* First, a couple of sanity checks.
*/
if( sym->data32.namelen == 0 )
{
break;
}
if( sym->data32.seg == 0 || sym->data32.seg > nsect )
{
break;
}
/*
* Global and local data symbols. We don't associate these
* with any given source file.
*/
memcpy(symname, sym->data32.name, sym->data32.namelen);
new_value.addr.seg = 0;
new_value.type = DEBUG_GetCVType(sym->data32.symtype);
new_value.addr.off = (unsigned int) module->load_addr +
sectp[sym->data32.seg - 1].VirtualAddress +
sym->data32.offset;
new_value.cookie = DV_TARGET;
DEBUG_AddSymbol( symname, &new_value, NULL, SYM_WIN32 | SYM_DATA );
break;
case S_THUNK:
/*
* Sort of like a global function, but it just points
* to a thunk, which is a stupid name for what amounts to
* a PLT slot in the normal jargon that everyone else uses.
*/
memcpy(symname, sym->thunk.name, sym->thunk.namelen);
new_value.addr.seg = 0;
new_value.type = NULL;
new_value.addr.off = (unsigned int) module->load_addr +
sectp[sym->thunk.segment - 1].VirtualAddress +
sym->thunk.offset;
new_value.cookie = DV_TARGET;
thunk_sym = DEBUG_AddSymbol( symname, &new_value, NULL,
SYM_WIN32 | SYM_FUNC);
DEBUG_SetSymbolSize(thunk_sym, sym->thunk.thunk_len);
break;
case S_GPROC:
case S_LPROC:
/*
* Global and static functions.
*/
memcpy(symname, sym->proc.name, sym->proc.namelen);
new_value.addr.seg = 0;
new_value.type = DEBUG_GetCVType(sym->proc.proctype);
new_value.addr.off = (unsigned int) module->load_addr +
sectp[sym->proc.segment - 1].VirtualAddress +
sym->proc.offset;
new_value.cookie = DV_TARGET;
/*
* See if we can find a segment that this goes with. If so,
* it means that we also may have line number information
* for this function.
*/
for(i=0; linetab && linetab[i].linetab != NULL; i++)
{
if( ((unsigned int) module->load_addr
+ sectp[linetab[i].segno - 1].VirtualAddress
+ linetab[i].start <= new_value.addr.off)
&& ((unsigned int) module->load_addr
+ sectp[linetab[i].segno - 1].VirtualAddress
+ linetab[i].end > new_value.addr.off) )
{
break;
}
}
DEBUG_Normalize(curr_func);
if( !linetab || linetab[i].linetab == NULL )
{
curr_func = DEBUG_AddSymbol( symname, &new_value, NULL,
SYM_WIN32 | SYM_FUNC);
}
else
{
/*
* First, create the entry. Then dig through the linetab
* and add whatever line numbers are appropriate for this
* function.
*/
curr_func = DEBUG_AddSymbol( symname, &new_value,
linetab[i].sourcefile,
SYM_WIN32 | SYM_FUNC);
for(j=0; j < linetab[i].nline; j++)
{
if( linetab[i].offtab[j] >= sym->proc.offset
&& linetab[i].offtab[j] < sym->proc.offset
+ sym->proc.proc_len )
{
DEBUG_AddLineNumber(curr_func, linetab[i].linetab[j],
linetab[i].offtab[j] - sym->proc.offset);
}
}
}
/*
* Add information about where we should set breakpoints
* in this function.
*/
DEBUG_SetSymbolBPOff(curr_func, sym->proc.debug_start);
DEBUG_SetSymbolSize(curr_func, sym->proc.proc_len);
break;
case S_GPROC_32:
case S_LPROC_32:
/*
* Global and static functions.
*/
memcpy(symname, sym->proc32.name, sym->proc32.namelen);
new_value.addr.seg = 0;
new_value.type = DEBUG_GetCVType(sym->proc32.proctype);
new_value.addr.off = (unsigned int) module->load_addr +
sectp[sym->proc32.segment - 1].VirtualAddress +
sym->proc32.offset;
new_value.cookie = DV_TARGET;
/*
* See if we can find a segment that this goes with. If so,
* it means that we also may have line number information
* for this function.
*/
for(i=0; linetab && linetab[i].linetab != NULL; i++)
{
if( ((unsigned int) module->load_addr
+ sectp[linetab[i].segno - 1].VirtualAddress
+ linetab[i].start <= new_value.addr.off)
&& ((unsigned int) module->load_addr
+ sectp[linetab[i].segno - 1].VirtualAddress
+ linetab[i].end > new_value.addr.off) )
{
break;
}
}
DEBUG_Normalize(curr_func);
if( !linetab || linetab[i].linetab == NULL )
{
curr_func = DEBUG_AddSymbol( symname, &new_value, NULL,
SYM_WIN32 | SYM_FUNC);
}
else
{
/*
* First, create the entry. Then dig through the linetab
* and add whatever line numbers are appropriate for this
* function.
*/
curr_func = DEBUG_AddSymbol( symname, &new_value,
linetab[i].sourcefile,
SYM_WIN32 | SYM_FUNC);
for(j=0; j < linetab[i].nline; j++)
{
if( linetab[i].offtab[j] >= sym->proc32.offset
&& linetab[i].offtab[j] < sym->proc32.offset
+ sym->proc32.proc_len )
{
DEBUG_AddLineNumber(curr_func, linetab[i].linetab[j],
linetab[i].offtab[j] - sym->proc32.offset);
}
}
}
/*
* Add information about where we should set breakpoints
* in this function.
*/
DEBUG_SetSymbolBPOff(curr_func, sym->proc32.debug_start);
DEBUG_SetSymbolSize(curr_func, sym->proc32.proc_len);
break;
case S_BPREL:
/*
* Function parameters and stack variables.
*/
memcpy(symname, sym->stack.name, sym->stack.namelen);
curr_sym = DEBUG_AddLocal(curr_func,
0,
sym->stack.offset,
0,
0,
symname);
DEBUG_SetLocalSymbolType(curr_sym, DEBUG_GetCVType(sym->stack.symtype));
break;
case S_BPREL_32:
/*
* Function parameters and stack variables.
*/
memcpy(symname, sym->stack32.name, sym->stack32.namelen);
curr_sym = DEBUG_AddLocal(curr_func,
0,
sym->stack32.offset,
0,
0,
symname);
DEBUG_SetLocalSymbolType(curr_sym, DEBUG_GetCVType(sym->stack32.symtype));
break;
default:
break;
}
/*
* Adjust pointer to point to next entry, rounding up to a word
* boundary. MS preserving alignment? Stranger things have
* happened.
*/
if( sym->generic.id == S_PROCREF
|| sym->generic.id == S_DATAREF
|| sym->generic.id == S_LPROCREF )
{
len = (sym->generic.len + 3) & ~3;
len += ptr.c[16] + 1;
ptr.c += (len + 3) & ~3;
}
else
{
ptr.c += (sym->generic.len + 3) & ~3;
}
}
if( linetab != NULL )
{
DBG_free(linetab);
}
DBG_free(sectp);
return TRUE;
}
/*
* Process PDB file which contains debug information.
*/
#pragma pack(1)
typedef struct _PDB_FILE
{
DWORD size;
DWORD unknown;
} PDB_FILE, *PPDB_FILE;
typedef struct _PDB_HEADER
{
CHAR ident[40];
DWORD signature;
DWORD blocksize;
WORD freelist;
WORD total_alloc;
PDB_FILE toc;
WORD toc_block[ 1 ];
} PDB_HEADER, *PPDB_HEADER;
typedef struct _PDB_TOC
{
DWORD nFiles;
PDB_FILE file[ 1 ];
} PDB_TOC, *PPDB_TOC;
typedef struct _PDB_ROOT
{
DWORD version;
DWORD TimeDateStamp;
DWORD unknown;
DWORD cbNames;
CHAR names[ 1 ];
} PDB_ROOT, *PPDB_ROOT;
typedef struct _PDB_TYPES_OLD
{
DWORD version;
WORD first_index;
WORD last_index;
DWORD type_size;
WORD file;
WORD pad;
} PDB_TYPES_OLD, *PPDB_TYPES_OLD;
typedef struct _PDB_TYPES
{
DWORD version;
DWORD type_offset;
DWORD first_index;
DWORD last_index;
DWORD type_size;
WORD file;
WORD pad;
DWORD hash_size;
DWORD hash_base;
DWORD hash_offset;
DWORD hash_len;
DWORD search_offset;
DWORD search_len;
DWORD unknown_offset;
DWORD unknown_len;
} PDB_TYPES, *PPDB_TYPES;
typedef struct _PDB_SYMBOL_RANGE
{
WORD segment;
WORD pad1;
DWORD offset;
DWORD size;
DWORD characteristics;
WORD index;
WORD pad2;
} PDB_SYMBOL_RANGE, *PPDB_SYMBOL_RANGE;
typedef struct _PDB_SYMBOL_RANGE_EX
{
WORD segment;
WORD pad1;
DWORD offset;
DWORD size;
DWORD characteristics;
WORD index;
WORD pad2;
DWORD timestamp;
DWORD unknown;
} PDB_SYMBOL_RANGE_EX, *PPDB_SYMBOL_RANGE_EX;
typedef struct _PDB_SYMBOL_FILE
{
DWORD unknown1;
PDB_SYMBOL_RANGE range;
WORD flag;
WORD file;
DWORD symbol_size;
DWORD lineno_size;
DWORD unknown2;
DWORD nSrcFiles;
DWORD attribute;
CHAR filename[ 1 ];
} PDB_SYMBOL_FILE, *PPDB_SYMBOL_FILE;
typedef struct _PDB_SYMBOL_FILE_EX
{
DWORD unknown1;
PDB_SYMBOL_RANGE_EX range;
WORD flag;
WORD file;
DWORD symbol_size;
DWORD lineno_size;
DWORD unknown2;
DWORD nSrcFiles;
DWORD attribute;
DWORD reserved[ 2 ];
CHAR filename[ 1 ];
} PDB_SYMBOL_FILE_EX, *PPDB_SYMBOL_FILE_EX;
typedef struct _PDB_SYMBOL_SOURCE
{
WORD nModules;
WORD nSrcFiles;
WORD table[ 1 ];
} PDB_SYMBOL_SOURCE, *PPDB_SYMBOL_SOURCE;
typedef struct _PDB_SYMBOL_IMPORT
{
DWORD unknown1;
DWORD unknown2;
DWORD TimeDateStamp;
DWORD nRequests;
CHAR filename[ 1 ];
} PDB_SYMBOL_IMPORT, *PPDB_SYMBOL_IMPORT;
typedef struct _PDB_SYMBOLS_OLD
{
WORD hash1_file;
WORD hash2_file;
WORD gsym_file;
WORD pad;
DWORD module_size;
DWORD offset_size;
DWORD hash_size;
DWORD srcmodule_size;
} PDB_SYMBOLS_OLD, *PPDB_SYMBOLS_OLD;
typedef struct _PDB_SYMBOLS
{
DWORD signature;
DWORD version;
DWORD extended_format;
DWORD hash1_file;
DWORD hash2_file;
DWORD gsym_file;
DWORD module_size;
DWORD offset_size;
DWORD hash_size;
DWORD srcmodule_size;
DWORD pdbimport_size;
DWORD resvd[ 5 ];
} PDB_SYMBOLS, *PPDB_SYMBOLS;
#pragma pack()
static void *pdb_read( LPBYTE image, WORD *block_list, int size )
{
PPDB_HEADER pdb = (PPDB_HEADER)image;
int i, nBlocks;
LPBYTE buffer;
if ( !size ) return NULL;
nBlocks = (size + pdb->blocksize-1) / pdb->blocksize;
buffer = DBG_alloc( nBlocks * pdb->blocksize );
for ( i = 0; i < nBlocks; i++ )
memcpy( buffer + i*pdb->blocksize,
image + block_list[i]*pdb->blocksize, pdb->blocksize );
return buffer;
}
static void *pdb_read_file( LPBYTE image, PPDB_TOC toc, int fileNr )
{
PPDB_HEADER pdb = (PPDB_HEADER)image;
WORD *block_list;
int i;
if ( !toc || fileNr >= toc->nFiles )
return NULL;
block_list = (WORD *) &toc->file[ toc->nFiles ];
for ( i = 0; i < fileNr; i++ )
block_list += (toc->file[i].size + pdb->blocksize-1) / pdb->blocksize;
return pdb_read( image, block_list, toc->file[fileNr].size );
}
static void pdb_free( void *buffer )
{
DBG_free( buffer );
}
static void pdb_convert_types_header( PDB_TYPES *types, char *image )
{
memset( types, 0, sizeof(PDB_TYPES) );
if ( !image ) return;
if ( *(DWORD *)image < 19960000 ) /* FIXME: correct version? */
{
/* Old version of the types record header */
PDB_TYPES_OLD *old = (PDB_TYPES_OLD *)image;
types->version = old->version;
types->type_offset = sizeof(PDB_TYPES_OLD);
types->type_size = old->type_size;
types->first_index = old->first_index;
types->last_index = old->last_index;
types->file = old->file;
}
else
{
/* New version of the types record header */
*types = *(PDB_TYPES *)image;
}
}
static void pdb_convert_symbols_header( PDB_SYMBOLS *symbols,
int *header_size, char *image )
{
memset( symbols, 0, sizeof(PDB_SYMBOLS) );
if ( !image ) return;
if ( *(DWORD *)image != 0xffffffff )
{
/* Old version of the symbols record header */
PDB_SYMBOLS_OLD *old = (PDB_SYMBOLS_OLD *)image;
symbols->version = 0;
symbols->extended_format = 0;
symbols->module_size = old->module_size;
symbols->offset_size = old->offset_size;
symbols->hash_size = old->hash_size;
symbols->srcmodule_size = old->srcmodule_size;
symbols->pdbimport_size = 0;
symbols->hash1_file = old->hash1_file;
symbols->hash2_file = old->hash2_file;
symbols->gsym_file = old->gsym_file;
*header_size = sizeof(PDB_SYMBOLS_OLD);
}
else
{
/* New version of the symbols record header */
*symbols = *(PDB_SYMBOLS *)image;
*header_size = sizeof(PDB_SYMBOLS);
}
}
static int DEBUG_ProcessPDBFile( DBG_MODULE* module, char *full_filename )
{
char filename[MAX_PATHNAME_LEN];
struct stat statbuf;
int fd = -1;
char *image = (char *) 0xffffffff;
PDB_HEADER *pdb = NULL;
PDB_TOC *toc = NULL;
PDB_ROOT *root = NULL;
char *types_image = NULL;
char *symbols_image = NULL;
PDB_TYPES types;
PDB_SYMBOLS symbols;
int header_size = 0;
char *modimage, *file;
/*
* Open and mmap() .PDB file
*/
LocateDebugInfoFile( full_filename, filename );
if ( stat( filename, &statbuf ) == -1 )
{
fprintf( stderr, "-Unable to open .PDB file %s\n", filename );
goto leave;
}
fd = open(filename, O_RDONLY);
if ( fd == -1 )
{
fprintf( stderr, "-Unable to open .PDB file %s\n", filename );
goto leave;
}
image = mmap( 0, statbuf.st_size, PROT_READ, MAP_PRIVATE, fd, 0 );
if ( image == (char *) 0xffffffff )
{
fprintf(stderr, "-Unable to mmap .PDB file %s\n", filename);
goto leave;
}
/*
* Read in TOC and well-known files
*/
pdb = (PPDB_HEADER)image;
toc = pdb_read( image, pdb->toc_block, pdb->toc.size );
root = pdb_read_file( image, toc, 1 );
types_image = pdb_read_file( image, toc, 2 );
symbols_image = pdb_read_file( image, toc, 3 );
pdb_convert_types_header( &types, types_image );
pdb_convert_symbols_header( &symbols, &header_size, symbols_image );
/*
* Check for unknown versions
*/
switch ( root->version )
{
case 19950623: /* VC 4.0 */
case 19950814:
case 19960307: /* VC 5.0 */
case 19970604: /* VC 6.0 */
break;
default:
fprintf( stderr, "-Unknown root block version %ld\n", root->version );
}
switch ( types.version )
{
case 19950410: /* VC 4.0 */
case 19951122:
case 19961031: /* VC 5.0 / 6.0 */
break;
default:
fprintf( stderr, "-Unknown type info version %ld\n", types.version );
}
switch ( symbols.version )
{
case 0: /* VC 4.0 */
case 19960307: /* VC 5.0 */
case 19970606: /* VC 6.0 */
break;
default:
fprintf( stderr, "-Unknown symbol info version %ld\n", symbols.version );
}
/*
* Check .PDB time stamp
*/
if ( root->TimeDateStamp
!= ((struct CodeViewDebug *)MSC_INFO(module)->dbg_info)->cv_timestamp )
{
fprintf(stderr, "-Wrong time stamp of .PDB file %s\n", filename);
goto leave;
}
/*
* Read type table
*/
DEBUG_ParseTypeTable( types_image + types.type_offset, types.type_size );
/*
* Read type-server .PDB imports
*/
if ( symbols.pdbimport_size )
{
/* FIXME */
fprintf(stderr, "-Type server .PDB imports ignored!\n" );
}
/*
* Read global symbol table
*/
modimage = pdb_read_file( image, toc, symbols.gsym_file );
if ( modimage )
{
DEBUG_SnarfCodeView( module, modimage,
toc->file[symbols.gsym_file].size, NULL );
pdb_free( modimage );
}
/*
* Read per-module symbol / linenumber tables
*/
file = symbols_image + header_size;
while ( file - symbols_image < header_size + symbols.module_size )
{
int file_nr, file_index, symbol_size, lineno_size;
char *file_name;
if ( !symbols.extended_format )
{
PDB_SYMBOL_FILE *sym_file = (PDB_SYMBOL_FILE *) file;
file_nr = sym_file->file;
file_name = sym_file->filename;
file_index = sym_file->range.index;
symbol_size = sym_file->symbol_size;
lineno_size = sym_file->lineno_size;
}
else
{
PDB_SYMBOL_FILE_EX *sym_file = (PDB_SYMBOL_FILE_EX *) file;
file_nr = sym_file->file;
file_name = sym_file->filename;
file_index = sym_file->range.index;
symbol_size = sym_file->symbol_size;
lineno_size = sym_file->lineno_size;
}
modimage = pdb_read_file( image, toc, file_nr );
if ( modimage )
{
struct codeview_linetab_hdr *linetab = NULL;
if ( lineno_size )
linetab = DEBUG_SnarfLinetab( modimage + symbol_size, lineno_size );
if ( symbol_size )
DEBUG_SnarfCodeView( module, modimage + sizeof(DWORD),
symbol_size - sizeof(DWORD), linetab );
pdb_free( modimage );
}
file_name += strlen(file_name) + 1;
file = (char *)( (DWORD)(file_name + strlen(file_name) + 1 + 3) & ~3 );
}
leave:
/*
* Cleanup
*/
if ( symbols_image ) pdb_free( symbols_image );
if ( types_image ) pdb_free( types_image );
if ( root ) pdb_free( root );
if ( toc ) pdb_free( toc );
if ( image != (char *) 0xffffffff ) munmap( image, statbuf.st_size );
if ( fd != -1 ) close( fd );
return TRUE;
}
/*
* Process DBG file which contains debug information.
*/
static
int
DEBUG_ProcessDBGFile(DBG_MODULE* module, char * filename)
{
char * addr = (char *) 0xffffffff;
char * codeview;
struct CV4_DirHead * codeview_dir;
struct CV4_DirEnt * codeview_dent;
PIMAGE_DEBUG_DIRECTORY dbghdr;
DBG_MODULE module2;
int fd = -1;
int i;
int j;
struct codeview_linetab_hdr * linetab;
int nsect;
PIMAGE_SEPARATE_DEBUG_HEADER pdbg = NULL;
IMAGE_SECTION_HEADER * sectp;
struct stat statbuf;
int status;
char dbg_file[MAX_PATHNAME_LEN];
LocateDebugInfoFile(filename, dbg_file);
status = stat(dbg_file, &statbuf);
if( status == -1 )
{
fprintf(stderr, "-Unable to open .DBG file %s\n", dbg_file);
goto leave;
}
/*
* Now open the file, so that we can mmap() it.
*/
fd = open(dbg_file, O_RDONLY);
if( fd == -1 )
{
fprintf(stderr, "Unable to open .DBG file %s\n", dbg_file);
goto leave;
}
/*
* Now mmap() the file.
*/
addr = mmap(0, statbuf.st_size, PROT_READ,
MAP_PRIVATE, fd, 0);
if( addr == (char *) 0xffffffff )
{
fprintf(stderr, "Unable to mmap .DBG file %s\n", dbg_file);
goto leave;
}
pdbg = (PIMAGE_SEPARATE_DEBUG_HEADER) addr;
if( pdbg->TimeDateStamp != MSC_INFO(module)->dbgdir.TimeDateStamp )
{
fprintf(stderr, "Warning - %s has incorrect internal timestamp\n",
dbg_file);
/* goto leave; */
/*
Well, sometimes this happens to DBG files which ARE REALLY the right .DBG
files but nonetheless this check fails. Anyway, WINDBG (debugger for
Windows by Microsoft) loads debug symbols which have incorrect timestamps.
*/
}
fprintf(stderr, "Processing symbols from %s...\n", dbg_file);
dbghdr = (PIMAGE_DEBUG_DIRECTORY) ( addr + sizeof(*pdbg)
+ pdbg->NumberOfSections * sizeof(IMAGE_SECTION_HEADER)
+ pdbg->ExportedNamesSize);
sectp = (PIMAGE_SECTION_HEADER) ((char *) pdbg + sizeof(*pdbg));
nsect = pdbg->NumberOfSections;
for( i=0; i < pdbg->DebugDirectorySize / sizeof(*pdbg); i++, dbghdr++ )
{
switch(dbghdr->Type)
{
case IMAGE_DEBUG_TYPE_COFF:
/*
* Dummy up a deferred debug header to handle the
* COFF stuff embedded within the DBG file.
*/
memset((char *) &module2, 0, sizeof(module2));
MSC_INFO(&module2)->dbg_info = (addr + dbghdr->PointerToRawData);
MSC_INFO(&module2)->dbg_size = dbghdr->SizeOfData;
module2.load_addr = module->load_addr;
DEBUG_ProcessCoff(&module2);
break;
case IMAGE_DEBUG_TYPE_CODEVIEW:
/*
* This is the older format by which codeview stuff is
* stored, known as the 'NB09' format. Newer executables
* and dlls created by VC++ use PDB files instead, which
* have lots of internal similarities, but the overall
* format and structure is quite different.
*/
codeview = (addr + dbghdr->PointerToRawData);
/*
* The first thing in the codeview section should be
* an 'NB09' identifier. As a sanity check, make sure
* it is there.
*/
if( *((unsigned int*) codeview) != 0x3930424e )
{
break;
}
/*
* Next we need to find the directory. This is easy too.
*/
codeview_dir = (struct CV4_DirHead *)
(codeview + ((unsigned int*) codeview)[1]);
/*
* Some more sanity checks. Make sure that everything
* is as we expect it.
*/
if( codeview_dir->next_offset != 0
|| codeview_dir->dhsize != sizeof(*codeview_dir)
|| codeview_dir->desize != sizeof(*codeview_dent) )
{
break;
}
codeview_dent = (struct CV4_DirEnt *) (codeview_dir + 1);
for(j=0; j < codeview_dir->ndir; j++, codeview_dent++)
{
if( codeview_dent->subsect_number == sstAlignSym )
{
/*
* Check the previous entry. If it is a
* sstSrcModule, it contains the line number
* info for this file.
*/
linetab = NULL;
if( codeview_dent[1].module_number == codeview_dent[0].module_number
&& codeview_dent[1].subsect_number == sstSrcModule )
{
linetab = DEBUG_SnarfLinetab(
codeview + codeview_dent[1].offset,
codeview_dent[1].size);
}
if( codeview_dent[-1].module_number == codeview_dent[0].module_number
&& codeview_dent[-1].subsect_number == sstSrcModule )
{
linetab = DEBUG_SnarfLinetab(
codeview + codeview_dent[-1].offset,
codeview_dent[-1].size);
}
/*
* Now process the CV stuff.
*/
DEBUG_SnarfCodeView(module,
codeview + codeview_dent->offset + sizeof(DWORD),
codeview_dent->size - sizeof(DWORD),
linetab);
}
}
break;
default:
break;
}
}
leave:
if( addr != (char *) 0xffffffff )
{
munmap(addr, statbuf.st_size);
}
if( fd != -1 )
{
close(fd);
}
return TRUE;
}
int
DEBUG_ProcessMSCDebugInfo(DBG_MODULE* module)
{
struct CodeViewDebug * cvd;
struct MiscDebug * misc;
char * filename;
int sts;
switch (MSC_INFO(module)->dbgdir.Type)
{
case IMAGE_DEBUG_TYPE_COFF:
/*
* Standard COFF debug information that VC++ adds when you
* use /debugtype:both with the linker.
*/
#if 0
fprintf(stderr, "Processing COFF symbols...\n");
#endif
sts = DEBUG_ProcessCoff(module);
break;
case IMAGE_DEBUG_TYPE_CODEVIEW:
/*
* This is a pointer to a PDB file of some sort.
*/
cvd = (struct CodeViewDebug *) MSC_INFO(module)->dbg_info;
if( strcmp(cvd->cv_nbtype, "NB10") != 0 )
{
/*
* Whatever this is, we don't know how to deal with
* it yet.
*/
sts = FALSE;
break;
}
sts = DEBUG_ProcessPDBFile(module, cvd->cv_name);
#if 0
fprintf(stderr, "Processing PDB file %s\n", cvd->cv_name);
#endif
break;
case IMAGE_DEBUG_TYPE_MISC:
/*
* A pointer to a .DBG file of some sort. These files
* can contain either CV4 or COFF information. Open
* the file, and try to do the right thing with it.
*/
misc = (struct MiscDebug *) MSC_INFO(module)->dbg_info;
filename = strrchr((char *) &misc->Data, '.');
/*
* Ignore the file if it doesn't have a .DBG extension.
*/
if( (filename == NULL)
|| ( (strcmp(filename, ".dbg") != 0)
&& (strcmp(filename, ".DBG") != 0)) )
{
sts = FALSE;
break;
}
filename = (char *) &misc->Data;
/*
* Do the dirty deed...
*/
sts = DEBUG_ProcessDBGFile(module, filename);
break;
default:
/*
* We should never get here...
*/
sts = FALSE;
break;
}
return sts;
}
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