debugger/dbg.y

   1 %{
   2 /*
   3  * Parser for command lines in the Wine debugger
   4  *
   5  * Copyright 1993 Eric Youngdale
   6  * Copyright 1995 Morten Welinder
   7  */
   8
   9 #include "ts_xlib.h"
  10
  11 #include <stdio.h>
  12 #include <signal.h>
  13 #include <sys/stat.h>
  14 #include <unistd.h>
  15 #include "winbase.h"
  16 #include "class.h"
  17 #include "module.h"
  18 #include "task.h"
  19 #include "options.h"
  20 #include "queue.h"
  21 #include "win.h"
  22 #include "winnt.h"
  23 #include "debugger.h"
  24 #include "neexe.h"
  25 #include "process.h"
  26
  27 #include "expr.h"
  28
  29 extern FILE * yyin;
  30 unsigned int dbg_mode = 0;
  31 int curr_frame = 0;
  32
  33 static enum exec_mode dbg_exec_mode = EXEC_CONT;
  34 static int dbg_exec_count = 0;
  35
  36 void issue_prompt(void);
  37 void mode_command(int);
  38 void flush_symbols(void);
  39 int yylex(void);
  40 int yyerror(char *);
  41
  42 extern void VIRTUAL_Dump(void);  /* memory/virtual.c */
  43
  44 %}
  45
  46 %union
  47 {
  48     DBG_ADDR         address;
  49     enum debug_regs  reg;
  50     char *           string;
  51     int              integer;
  52     struct list_id   listing;
  53     struct expr *    expression;
  54     struct datatype * type;
  55 }
  56
  57 %token tCONT tSTEP tLIST tNEXT tQUIT tHELP tBACKTRACE tINFO tWALK tUP tDOWN
  58 %token tENABLE tDISABLE tBREAK tDELETE tSET tMODE tPRINT tEXAM tABORT
  59 %token tCLASS tMAPS tMODULE tSTACK tSEGMENTS tREGS tWND tQUEUE tLOCAL
  60 %token tEOL tSTRING
  61 %token tFRAME tSHARE tCOND tDISPLAY tUNDISPLAY tDISASSEMBLE
  62 %token tSTEPI tNEXTI tFINISH tSHOW tDIR
  63 %token <string> tPATH
  64 %token <string> tIDENTIFIER tSTRING
  65 %token <integer> tNUM tFORMAT
  66 %token <reg> tREG
  67
  68 %token tCHAR tSHORT tINT tLONG tFLOAT tDOUBLE tUNSIGNED tSIGNED
  69 %token tSTRUCT tUNION tENUM
  70
  71 /* %left ',' */
  72 /* %left '=' OP_OR_EQUAL OP_XOR_EQUAL OP_AND_EQUAL OP_SHL_EQUAL \
  73          OP_SHR_EQUAL OP_PLUS_EQUAL OP_MINUS_EQUAL \
  74          OP_TIMES_EQUAL OP_DIVIDE_EQUAL OP_MODULO_EQUAL */
  75 /* %left OP_COND */ /* ... ? ... : ... */
  76 %left OP_LOR
  77 %left OP_LAND
  78 %left '|'
  79 %left '^'
  80 %left '&'
  81 %left OP_EQ OP_NE
  82 %left '<' '>' OP_LE OP_GE
  83 %left OP_SHL OP_SHR
  84 %left '+' '-'
  85 %left '*' '/' '%'
  86 %left OP_SIGN '!' '~' OP_DEREF /* OP_INC OP_DEC OP_ADDR */
  87 %left '.' '[' OP_DRF
  88 %nonassoc ':'
  89
  90 %type <expression> expr lval lvalue
  91 %type <type> type_cast type_expr
  92 %type <address> expr_addr lval_addr
  93 %type <integer> expr_value
  94 %type <string> pathname
  95
  96 %type <listing> list_arg
  97
  98 %%
  99
 100 input: line                    { issue_prompt(); }
 101     | input line               { issue_prompt(); }
 102
 103 line: command
 104     | tEOL
 105     | error tEOL               { yyerrok; }
 106
 107 command:
 108       tQUIT tEOL               { exit(0); }
 109     | tHELP tEOL               { DEBUG_Help(); }
 110     | tHELP tINFO tEOL         { DEBUG_HelpInfo(); }
 111     | tCONT tEOL               { dbg_exec_count = 1;
 112                                  dbg_exec_mode = EXEC_CONT; return 0; }
 113     | tCONT tNUM tEOL          { dbg_exec_count = $2;
 114                                  dbg_exec_mode = EXEC_CONT; return 0; }
 115     | tSTEP tEOL               { dbg_exec_count = 1;
 116                                  dbg_exec_mode = EXEC_STEP_INSTR; return 0; }
 117     | tNEXT tEOL               { dbg_exec_count = 1;
 118                                  dbg_exec_mode = EXEC_STEP_OVER; return 0; }
 119     | tSTEP tNUM tEOL          { dbg_exec_count = $2;
 120                                  dbg_exec_mode = EXEC_STEP_INSTR; return 0; }
 121     | tNEXT tNUM tEOL          { dbg_exec_count = $2;
 122                                  dbg_exec_mode = EXEC_STEP_OVER; return 0; }
 123     | tSTEPI tEOL              { dbg_exec_count = 1;
 124                                  dbg_exec_mode = EXEC_STEPI_INSTR; return 0; }
 125     | tNEXTI tEOL              { dbg_exec_count = 1;
 126                                  dbg_exec_mode = EXEC_STEPI_OVER; return 0; }
 127     | tSTEPI tNUM tEOL         { dbg_exec_count = $2;
 128                                  dbg_exec_mode = EXEC_STEPI_INSTR; return 0; }
 129     | tNEXTI tNUM tEOL         { dbg_exec_count = $2;
 130                                  dbg_exec_mode = EXEC_STEPI_OVER; return 0; }
 131     | tABORT tEOL              { kill(getpid(), SIGABRT); }
 132     | tMODE tNUM tEOL          { mode_command($2); }
 133     | tENABLE tNUM tEOL        { DEBUG_EnableBreakpoint( $2, TRUE ); }
 134     | tDISABLE tNUM tEOL       { DEBUG_EnableBreakpoint( $2, FALSE ); }
 135     | tDELETE tBREAK tNUM tEOL { DEBUG_DelBreakpoint( $3 ); }
 136     | tBACKTRACE tEOL          { DEBUG_BackTrace(); }
 137     | tUP tEOL                 { DEBUG_SetFrame( curr_frame + 1 );  }
 138     | tUP tNUM tEOL            { DEBUG_SetFrame( curr_frame + $2 ); }
 139     | tDOWN tEOL               { DEBUG_SetFrame( curr_frame - 1 );  }
 140     | tDOWN tNUM tEOL          { DEBUG_SetFrame( curr_frame - $2 ); }
 141     | tFRAME tNUM tEOL         { DEBUG_SetFrame( $2 ); }
 142     | tFINISH tEOL             { dbg_exec_count = 0;
 143                                  dbg_exec_mode = EXEC_FINISH; return 0; }
 144     | tSHOW tDIR tEOL          { DEBUG_ShowDir(); }
 145     | tDIR pathname tEOL       { DEBUG_AddPath( $2 ); }
 146     | tDIR tEOL                { DEBUG_NukePath(); }
 147     | tDISPLAY tEOL            { DEBUG_InfoDisplay(); }
 148     | tDISPLAY expr tEOL       { DEBUG_AddDisplay($2, 1, 0); }
 149     | tDISPLAY tFORMAT expr tEOL { DEBUG_AddDisplay($3, $2 >> 8, $2 & 0xff); }
 150     | tDELETE tDISPLAY tNUM tEOL { DEBUG_DelDisplay( $3 ); }
 151     | tDELETE tDISPLAY tEOL    { DEBUG_DelDisplay( -1 ); }
 152     | tUNDISPLAY tNUM tEOL     { DEBUG_DelDisplay( $2 ); }
 153     | tUNDISPLAY tEOL          { DEBUG_DelDisplay( -1 ); }
 154     | tCOND tNUM tEOL          { DEBUG_AddBPCondition($2, NULL); }
 155     | tCOND tNUM expr tEOL     { DEBUG_AddBPCondition($2, $3); }
 156     | list_command
 157     | disassemble_command
 158     | set_command
 159     | x_command
 160     | print_command
 161     | break_command
 162     | info_command
 163     | walk_command
 164
 165 set_command:
 166       tSET tREG '=' expr_value tEOL        { DEBUG_SetRegister( $2, $4 );
 167                                              DEBUG_FreeExprMem(); }
 168     | tSET lval_addr '=' expr_value tEOL   { DEBUG_WriteMemory( &$2, $4 );
 169                                              DEBUG_FreeExprMem(); }
 170
 171 pathname:
 172       tIDENTIFIER                    { $$ = $1; }
 173     | tPATH                          { $$ = $1; }
 174
 175 disassemble_command:
 176       tDISASSEMBLE tEOL              { DEBUG_Disassemble( NULL, NULL, 10 ); }
 177     | tDISASSEMBLE expr_addr tEOL    { DEBUG_Disassemble( & $2, NULL, 10 ); }
 178     | tDISASSEMBLE expr_addr ',' expr_addr tEOL { DEBUG_Disassemble( & $2, & $4, 0 ); }
 179
 180 list_command:
 181       tLIST tEOL               { DEBUG_List( NULL, NULL, 10 ); }
 182     | tLIST '-' tEOL           { DEBUG_List( NULL, NULL, -10 ); }
 183     | tLIST list_arg tEOL      { DEBUG_List( & $2, NULL, 10 ); }
 184     | tLIST ',' list_arg tEOL  { DEBUG_List( NULL, & $3, -10 ); }
 185     | tLIST list_arg ',' list_arg tEOL { DEBUG_List( & $2, & $4, 0 ); }
 186
 187 list_arg:
 188       tNUM                     { $$.sourcefile = NULL; $$.line = $1; }
 189     | pathname ':' tNUM        { $$.sourcefile = $1; $$.line = $3; }
 190     | tIDENTIFIER              { DEBUG_GetFuncInfo( & $$, NULL, $1); }
 191     | pathname ':' tIDENTIFIER { DEBUG_GetFuncInfo( & $$, $1, $3); }
 192     | '*' expr_addr            { DEBUG_FindNearestSymbol( & $2, FALSE, NULL,
 193                                                         0, & $$ );
 194                                              DEBUG_FreeExprMem(); }
 195
 196 x_command:
 197       tEXAM expr_addr tEOL     { DEBUG_ExamineMemory( &$2, 1, 'x');
 198                                              DEBUG_FreeExprMem(); }
 199     | tEXAM tFORMAT expr_addr tEOL  { DEBUG_ExamineMemory( &$3, $2>>8, $2&0xff );
 200                                              DEBUG_FreeExprMem(); }
 201
 202 print_command:
 203       tPRINT expr_addr tEOL    { DEBUG_Print( &$2, 1, 0, 0 );
 204                                              DEBUG_FreeExprMem(); }
 205     | tPRINT tFORMAT expr_addr tEOL { DEBUG_Print( &$3, $2 >> 8, $2 & 0xff, 0 );
 206                                              DEBUG_FreeExprMem(); }
 207
 208 break_command:
 209       tBREAK '*' expr_addr tEOL { DEBUG_AddBreakpoint( &$3 );
 210                                              DEBUG_FreeExprMem(); }
 211     | tBREAK tIDENTIFIER tEOL  { DBG_ADDR addr;
 212                                  if( DEBUG_GetSymbolValue($2, -1, &addr, TRUE) )
 213                                    {
 214                                      DEBUG_AddBreakpoint( &addr );
 215                                    }
 216                                  else
 217                                    {
 218                                      fprintf(stderr,"Unable to add breakpoint\n");
 219                                    }
 220                                 }
 221     | tBREAK tIDENTIFIER ':' tNUM tEOL  { DBG_ADDR addr;
 222                                  if( DEBUG_GetSymbolValue($2, $4, &addr, TRUE) )
 223                                    {
 224                                      DEBUG_AddBreakpoint( &addr );
 225                                    }
 226                                  else
 227                                    {
 228                                      fprintf(stderr,"Unable to add breakpoint\n");
 229                                    }
 230                                 }
 231     | tBREAK tNUM tEOL         { struct name_hash *nh;
 232                                  DBG_ADDR addr = { NULL,
 233                                                    CS_reg(&DEBUG_context),
 234                                                    EIP_reg(&DEBUG_context) };
 235                                  TDB *pTask = (TDB*)GlobalLock16( GetCurrentTask() );
 236                                  if (ISV86(&DEBUG_context))
 237                                      addr.seg |= (DWORD)(pTask?(pTask->hModule):0)<<16;
 238                                  DBG_FIX_ADDR_SEG( &addr, CS_reg(&DEBUG_context) );
 239                                  GlobalUnlock16( GetCurrentTask() );
 240                                  DEBUG_FindNearestSymbol(&addr, TRUE,
 241                                                          &nh, 0, NULL);
 242                                  if( nh != NULL )
 243                                    {
 244                                      DEBUG_GetLineNumberAddr(nh,
 245                                                       $2, &addr, TRUE);
 246                                      DEBUG_AddBreakpoint( &addr );
 247                                    }
 248                                  else
 249                                    {
 250                                      fprintf(stderr,"Unable to add breakpoint\n");
 251                                    }
 252                                }
 253
 254     | tBREAK tEOL              { DBG_ADDR addr = { NULL,
 255                                                    CS_reg(&DEBUG_context),
 256                                                    EIP_reg(&DEBUG_context) };
 257                                  TDB *pTask = (TDB*)GlobalLock16( GetCurrentTask() );
 258                                  if (ISV86(&DEBUG_context))
 259                                      addr.seg |= (DWORD)(pTask?(pTask->hModule):0)<<16;
 260                                  GlobalUnlock16( GetCurrentTask() );
 261                                  DEBUG_AddBreakpoint( &addr );
 262                                }
 263
 264 info_command:
 265       tINFO tBREAK tEOL         { DEBUG_InfoBreakpoints(); }
 266     | tINFO tCLASS expr_value tEOL    { CLASS_DumpClass( (CLASS *)$3 );
 267                                              DEBUG_FreeExprMem(); }
 268     | tINFO tSHARE tEOL         { DEBUG_InfoShare(); }
 269     | tINFO tMODULE expr_value tEOL   { NE_DumpModule( $3 );
 270                                              DEBUG_FreeExprMem(); }
 271     | tINFO tQUEUE expr_value tEOL    { QUEUE_DumpQueue( $3 );
 272                                              DEBUG_FreeExprMem(); }
 273     | tINFO tREGS tEOL          { DEBUG_InfoRegisters(); }
 274     | tINFO tSEGMENTS expr_value tEOL { LDT_Print( SELECTOR_TO_ENTRY($3), 1 );
 275                                              DEBUG_FreeExprMem(); }
 276     | tINFO tSEGMENTS tEOL      { LDT_Print( 0, -1 ); }
 277     | tINFO tSTACK tEOL         { DEBUG_InfoStack(); }
 278     | tINFO tMAPS tEOL          { VIRTUAL_Dump(); }
 279     | tINFO tWND expr_value tEOL      { WIN_DumpWindow( $3 );
 280                                              DEBUG_FreeExprMem(); }
 281     | tINFO tLOCAL tEOL         { DEBUG_InfoLocals(); }
 282     | tINFO tDISPLAY tEOL       { DEBUG_InfoDisplay(); }
 283
 284 walk_command:
 285       tWALK tCLASS tEOL         { CLASS_WalkClasses(); }
 286     | tWALK tMODULE tEOL        { NE_WalkModules(); }
 287     | tWALK tQUEUE tEOL         { QUEUE_WalkQueues(); }
 288     | tWALK tWND tEOL           { WIN_WalkWindows( 0, 0 ); }
 289     | tWALK tWND tNUM tEOL      { WIN_WalkWindows( $3, 0 ); }
 290
 291
 292 type_cast:
 293       '(' type_expr ')'         { $$ = $2; }
 294
 295 type_expr:
 296       type_expr '*'             { $$ = DEBUG_FindOrMakePointerType($1); }
 297     |  tINT                     { $$ = DEBUG_TypeCast(DT_BASIC, "int"); }
 298     | tCHAR                     { $$ = DEBUG_TypeCast(DT_BASIC, "char"); }
 299     | tLONG tINT                { $$ = DEBUG_TypeCast(DT_BASIC, "long int"); }
 300     | tUNSIGNED tINT            { $$ = DEBUG_TypeCast(DT_BASIC, "unsigned int"); }
 301     | tLONG tUNSIGNED tINT      { $$ = DEBUG_TypeCast(DT_BASIC, "long unsigned int"); }
 302     | tLONG tLONG tINT          { $$ = DEBUG_TypeCast(DT_BASIC, "long long int"); }
 303     | tLONG tLONG tUNSIGNED tINT { $$ = DEBUG_TypeCast(DT_BASIC, "long long unsigned int"); }
 304     | tSHORT tINT               { $$ = DEBUG_TypeCast(DT_BASIC, "short int"); }
 305     | tSHORT tUNSIGNED tINT     { $$ = DEBUG_TypeCast(DT_BASIC, "short unsigned int"); }
 306     | tSIGNED tCHAR             { $$ = DEBUG_TypeCast(DT_BASIC, "signed char"); }
 307     | tUNSIGNED tCHAR           { $$ = DEBUG_TypeCast(DT_BASIC, "unsigned char"); }
 308     | tFLOAT                    { $$ = DEBUG_TypeCast(DT_BASIC, "float"); }
 309     | tDOUBLE                   { $$ = DEBUG_TypeCast(DT_BASIC, "double"); }
 310     | tLONG tDOUBLE             { $$ = DEBUG_TypeCast(DT_BASIC, "long double"); }
 311     | tSTRUCT tIDENTIFIER       { $$ = DEBUG_TypeCast(DT_STRUCT, $2); }
 312     | tUNION tIDENTIFIER        { $$ = DEBUG_TypeCast(DT_STRUCT, $2); }
 313     | tENUM tIDENTIFIER         { $$ = DEBUG_TypeCast(DT_ENUM, $2); }
 314
 315 expr_addr:
 316     expr                         { $$ = DEBUG_EvalExpr($1); }
 317
 318 expr_value:
 319       expr        { DBG_ADDR addr  = DEBUG_EvalExpr($1);
 320                     $$ = addr.off ? *(unsigned int *) addr.off : 0; }
 321 /*
 322  * The expr rule builds an expression tree.  When we are done, we call
 323  * EvalExpr to evaluate the value of the expression.  The advantage of
 324  * the two-step approach is that it is possible to save expressions for
 325  * use in 'display' commands, and in conditional watchpoints.
 326  */
 327 expr:
 328       tNUM                       { $$ = DEBUG_ConstExpr($1); }
 329     | tSTRING                    { $$ = DEBUG_StringExpr($1); }
 330     | tREG                       { $$ = DEBUG_RegisterExpr($1); }
 331     | tIDENTIFIER                { $$ = DEBUG_SymbolExpr($1); }
 332     | expr OP_DRF tIDENTIFIER    { $$ = DEBUG_StructPExpr($1, $3); }
 333     | expr '.' tIDENTIFIER       { $$ = DEBUG_StructExpr($1, $3); }
 334     | tIDENTIFIER '(' ')'        { $$ = DEBUG_CallExpr($1, 0); }
 335     | tIDENTIFIER '(' expr ')'   { $$ = DEBUG_CallExpr($1, 1, $3); }
 336     | tIDENTIFIER '(' expr ',' expr ')'  { $$ = DEBUG_CallExpr($1, 2, $3,
 337                                                                $5); }
 338     | tIDENTIFIER '(' expr ',' expr ',' expr ')'         { $$ = DEBUG_CallExpr($1, 3, $3, $5, $7); }
 339     | tIDENTIFIER '(' expr ',' expr ',' expr ',' expr ')'        { $$ = DEBUG_CallExpr($1, 3, $3, $5, $7, $9); }
 340     | tIDENTIFIER '(' expr ',' expr ',' expr ',' expr ',' expr ')'       { $$ = DEBUG_CallExpr($1, 3, $3, $5, $7, $9, $11); }
 341     | expr '[' expr ']'          { $$ = DEBUG_BinopExpr(EXP_OP_ARR, $1, $3); }
 342     | expr ':' expr              { $$ = DEBUG_BinopExpr(EXP_OP_SEG, $1, $3); }
 343     | expr OP_LOR expr           { $$ = DEBUG_BinopExpr(EXP_OP_LOR, $1, $3); }
 344     | expr OP_LAND expr          { $$ = DEBUG_BinopExpr(EXP_OP_LAND, $1, $3); }
 345     | expr '|' expr              { $$ = DEBUG_BinopExpr(EXP_OP_OR, $1, $3); }
 346     | expr '&' expr              { $$ = DEBUG_BinopExpr(EXP_OP_AND, $1, $3); }
 347     | expr '^' expr              { $$ = DEBUG_BinopExpr(EXP_OP_XOR, $1, $3); }
 348     | expr OP_EQ expr            { $$ = DEBUG_BinopExpr(EXP_OP_EQ, $1, $3); }
 349     | expr '>' expr              { $$ = DEBUG_BinopExpr(EXP_OP_GT, $1, $3); }
 350     | expr '<' expr              { $$ = DEBUG_BinopExpr(EXP_OP_LT, $1, $3); }
 351     | expr OP_GE expr            { $$ = DEBUG_BinopExpr(EXP_OP_GE, $1, $3); }
 352     | expr OP_LE expr            { $$ = DEBUG_BinopExpr(EXP_OP_LE, $1, $3); }
 353     | expr OP_NE expr            { $$ = DEBUG_BinopExpr(EXP_OP_NE, $1, $3); }
 354     | expr OP_SHL expr           { $$ = DEBUG_BinopExpr(EXP_OP_SHL, $1, $3); }
 355     | expr OP_SHR expr           { $$ = DEBUG_BinopExpr(EXP_OP_SHR, $1, $3); }
 356     | expr '+' expr              { $$ = DEBUG_BinopExpr(EXP_OP_ADD, $1, $3); }
 357     | expr '-' expr              { $$ = DEBUG_BinopExpr(EXP_OP_SUB, $1, $3); }
 358     | expr '*' expr              { $$ = DEBUG_BinopExpr(EXP_OP_MUL, $1, $3); }
 359     | expr '/' expr              { $$ = DEBUG_BinopExpr(EXP_OP_DIV, $1, $3); }
 360     | expr '%' expr              { $$ = DEBUG_BinopExpr(EXP_OP_REM, $1, $3); }
 361     | '-' expr %prec OP_SIGN     { $$ = DEBUG_UnopExpr(EXP_OP_NEG, $2); }
 362     | '+' expr %prec OP_SIGN     { $$ = $2; }
 363     | '!' expr                   { $$ = DEBUG_UnopExpr(EXP_OP_NOT, $2); }
 364     | '~' expr                   { $$ = DEBUG_UnopExpr(EXP_OP_LNOT, $2); }
 365     | '(' expr ')'               { $$ = $2; }
 366     | '*' expr %prec OP_DEREF    { $$ = DEBUG_UnopExpr(EXP_OP_DEREF, $2); }
 367     | '&' expr %prec OP_DEREF    { $$ = DEBUG_UnopExpr(EXP_OP_ADDR, $2); }
 368     | type_cast expr %prec OP_DEREF { $$ = DEBUG_TypeCastExpr($1, $2); }
 369
 370 /*
 371  * The lvalue rule builds an expression tree.  This is a limited form
 372  * of expression that is suitable to be used as an lvalue.
 373  */
 374 lval_addr:
 375     lval                         { $$ = DEBUG_EvalExpr($1); }
 376
 377 lval:
 378       lvalue                     { $$ = $1; }
 379     | '*' expr                   { $$ = DEBUG_UnopExpr(EXP_OP_FORCE_DEREF, $2); }
 380
 381 lvalue:
 382       tNUM                       { $$ = DEBUG_ConstExpr($1); }
 383     | tREG                       { $$ = DEBUG_RegisterExpr($1); }
 384     | tIDENTIFIER                { $$ = DEBUG_SymbolExpr($1); }
 385     | lvalue OP_DRF tIDENTIFIER  { $$ = DEBUG_StructPExpr($1, $3); }
 386     | lvalue '.' tIDENTIFIER     { $$ = DEBUG_StructExpr($1, $3); }
 387     | lvalue '[' expr ']'        { $$ = DEBUG_BinopExpr(EXP_OP_ARR, $1, $3); }
 388
 389 %%
 390
 391 void
 392 issue_prompt(){
 393 #ifdef DONT_USE_READLINE
 394         fprintf(stderr,"Wine-dbg>");
 395 #endif
 396 }
 397
 398 void mode_command(int newmode)
 399 {
 400     if ((newmode == 16) || (newmode == 32)) dbg_mode = newmode;
 401     else fprintf(stderr,"Invalid mode (use 16 or 32)\n");
 402 }
 403
 404
 405 /***********************************************************************
 406  *           DEBUG_Main
 407  *
 408  * Debugger main loop.
 409  */
 410 static void DEBUG_Main( int signal )
 411 {
 412     static int loaded_symbols = 0;
 413     static BOOL32 in_debugger = FALSE;
 414     char SymbolTableFile[256];
 415     int newmode;
 416     BOOL32 ret_ok;
 417 #ifdef YYDEBUG
 418     yydebug = 0;
 419 #endif
 420
 421     if (in_debugger)
 422     {
 423         fprintf( stderr, "Segmentation fault inside debugger, exiting.\n" );
 424         exit(1);
 425     }
 426     in_debugger = TRUE;
 427     yyin = stdin;
 428
 429     DEBUG_SetBreakpoints( FALSE );
 430
 431     if (!loaded_symbols)
 432     {
 433         loaded_symbols++;
 434
 435         /*
 436          * Initialize the type handling stuff.
 437          */
 438         DEBUG_InitTypes();
 439
 440         /*
 441          * In some cases we can read the stabs information directly
 442          * from the executable.  If this is the case, we don't need
 443          * to bother with trying to read a symbol file, as the stabs
 444          * also have line number and local variable information.
 445          * As long as gcc is used for the compiler, stabs will
 446          * be the default.  On SVr4, DWARF could be used, but we
 447          * don't grok that yet, and in this case we fall back to using
 448          * the wine.sym file.
 449          */
 450         if( DEBUG_ReadExecutableDbgInfo() == FALSE )
 451         {
 452             char *symfilename = "wine.sym";
 453             struct stat statbuf;
 454             if (-1 == stat(symfilename, &statbuf) )
 455                 symfilename = LIBDIR "wine.sym";
 456
 457             PROFILE_GetWineIniString( "wine", "SymbolTableFile", symfilename,
 458                                      SymbolTableFile, sizeof(SymbolTableFile));
 459             DEBUG_ReadSymbolTable( SymbolTableFile );
 460         }
 461
 462         DEBUG_LoadEntryPoints();
 463         DEBUG_ProcessDeferredDebug();
 464     }
 465
 466 #if 0
 467     fprintf(stderr, "Entering debugger  PC=%x, mode=%d, count=%d\n",
 468             EIP_reg(&DEBUG_context),
 469             dbg_exec_mode, dbg_exec_count);
 470
 471     sleep(1);
 472 #endif
 473
 474     if ((signal != SIGTRAP) || !DEBUG_ShouldContinue( dbg_exec_mode,
 475                                                       &dbg_exec_count ))
 476     {
 477         DBG_ADDR addr;
 478         TDB *pTask = (TDB*)GlobalLock16( GetCurrentTask() );
 479
 480         addr.seg = CS_reg(&DEBUG_context);
 481         addr.off = EIP_reg(&DEBUG_context);
 482         if (ISV86(&DEBUG_context)) addr.seg |= (DWORD)(pTask?(pTask->hModule):0)<<16;
 483         addr.type = NULL;
 484         DBG_FIX_ADDR_SEG( &addr, 0 );
 485
 486         GlobalUnlock16( GetCurrentTask() );
 487
 488         /* Put the display in a correct state */
 489
 490         TSXUngrabServer( display );
 491         TSXFlush( display );
 492
 493         newmode = ISV86(&DEBUG_context) ? 16 : IS_SELECTOR_32BIT(addr.seg) ? 32 : 16;
 494         if (newmode != dbg_mode)
 495             fprintf(stderr,"In %d bit mode.\n", dbg_mode = newmode);
 496
 497         PROCESS_SuspendOtherThreads();
 498
 499         DEBUG_DoDisplay();
 500
 501         if (signal != SIGTRAP)  /* This is a real crash, dump some info */
 502         {
 503             DEBUG_InfoRegisters();
 504             DEBUG_InfoStack();
 505             if (dbg_mode == 16)
 506             {
 507                 LDT_Print( SELECTOR_TO_ENTRY(DS_reg(&DEBUG_context)), 1 );
 508                 if (ES_reg(&DEBUG_context) != DS_reg(&DEBUG_context))
 509                     LDT_Print( SELECTOR_TO_ENTRY(ES_reg(&DEBUG_context)), 1 );
 510             }
 511             DEBUG_BackTrace();
 512         }
 513         else
 514         {
 515           /*
 516            * Do a quiet backtrace so that we have an idea of what the situation
 517            * is WRT the source files.
 518            */
 519             DEBUG_SilentBackTrace();
 520         }
 521
 522         if ((signal != SIGTRAP) ||
 523             (dbg_exec_mode == EXEC_STEPI_OVER) ||
 524             (dbg_exec_mode == EXEC_STEPI_INSTR))
 525         {
 526             /* Show where we crashed */
 527             curr_frame = 0;
 528             DEBUG_PrintAddress( &addr, dbg_mode, TRUE );
 529             fprintf(stderr,":  ");
 530             if (DBG_CHECK_READ_PTR( &addr, 1 ))
 531               {
 532                 DEBUG_Disasm( &addr, TRUE );
 533                 fprintf(stderr,"\n");
 534               }
 535         }
 536
 537         ret_ok = 0;
 538         do
 539         {
 540             issue_prompt();
 541             yyparse();
 542             flush_symbols();
 543             addr.seg = CS_reg(&DEBUG_context) | (addr.seg&0xffff0000);
 544             addr.off = EIP_reg(&DEBUG_context);
 545             DBG_FIX_ADDR_SEG( &addr, 0 );
 546             ret_ok = DEBUG_ValidateRegisters();
 547             if (ret_ok) ret_ok = DBG_CHECK_READ_PTR( &addr, 1 );
 548         } while (!ret_ok);
 549     }
 550
 551     dbg_exec_mode = DEBUG_RestartExecution( dbg_exec_mode, dbg_exec_count );
 552     /*
 553      * This will have gotten absorbed into the breakpoint info
 554      * if it was used.  Otherwise it would have been ignored.
 555      * In any case, we don't mess with it any more.
 556      */
 557     if( dbg_exec_mode == EXEC_CONT )
 558       {
 559         dbg_exec_count = 0;
 560         PROCESS_ResumeOtherThreads();
 561       }
 562
 563     in_debugger = FALSE;
 564 }
 565
 566
 567
 568 /***********************************************************************
 569  *           DebugBreak   (KERNEL.203) (KERNEL32.181)
 570  */
 571 void DebugBreak( CONTEXT *regs )
 572 {
 573     char module[10];
 574     if (!GetModuleName( GetCurrentTask(), module, sizeof(module) ))
 575         strcpy( module, "???" );
 576     fprintf( stderr, "%s called DebugBreak\n", module );
 577     DEBUG_context = *regs;
 578     DEBUG_Main( SIGTRAP );
 579 }
 580
 581
 582 void ctx_debug( int signal, CONTEXT *regs )
 583 {
 584     DEBUG_context = *regs;
 585     DEBUG_Main( signal );
 586     *regs = DEBUG_context;
 587 }
 588
 589 void wine_debug( int signal, SIGCONTEXT *regs )
 590 {
 591 #if 0
 592     DWORD *stack = (DWORD *)ESP_sig(regs);
 593     *(--stack) = 0;
 594     *(--stack) = 0;
 595     *(--stack) = EH_NONCONTINUABLE;
 596     *(--stack) = EXCEPTION_ACCESS_VIOLATION;
 597     *(--stack) = EIP_sig(regs);
 598     ESP_sig(regs) = (DWORD)stack;
 599     EIP_sig(regs) = (DWORD)RaiseException;
 600 #else
 601     DEBUG_SetSigContext( regs );
 602     DEBUG_Main( signal );
 603     DEBUG_GetSigContext( regs );
 604 #endif
 605 }
 606
 607 int yyerror(char * s)
 608 {
 609         fprintf(stderr,"%s\n", s);
 610         return 0;
 611 }