2 * File expr.c - expression handling for Wine internal debugger.
4 * Copyright (C) 1997, Eric Youngdale.
12 #include <sys/types.h>
15 #include "selectors.h"
72 struct datatype * cast;
79 const char * element_name;
91 const char * funcname;
100 #define EXPR_TYPE_CONST 0
101 #define EXPR_TYPE_US_CONST 1
102 #define EXPR_TYPE_SYMBOL 2
103 #define EXPR_TYPE_REGISTER 3
104 #define EXPR_TYPE_BINOP 4
105 #define EXPR_TYPE_UNOP 5
106 #define EXPR_TYPE_STRUCT 6
107 #define EXPR_TYPE_PSTRUCT 7
108 #define EXPR_TYPE_ARRAY 8
109 #define EXPR_TYPE_CALL 9
110 #define EXPR_TYPE_STRING 10
111 #define EXPR_TYPE_CAST 11
113 static char expr_list[4096];
114 static int next_expr_free = 0;
117 * This is how we turn an expression address into the actual value.
118 * This works well in the 32 bit domain - not sure at all about the
121 #define VAL(_exp) DEBUG_GetExprValue(&_exp, NULL)
129 rtn = (struct expr *) &expr_list[next_expr_free];
131 next_expr_free += sizeof(struct expr);
142 DEBUG_TypeCastExpr(struct datatype * dt, struct expr * exp)
146 ex = DEBUG_GetFreeExpr();
148 ex->type = EXPR_TYPE_CAST;
149 ex->un.cast.cast = dt;
150 ex->un.cast.expr = exp;
155 DEBUG_RegisterExpr(enum debug_regs regno)
159 ex = DEBUG_GetFreeExpr();
161 ex->type = EXPR_TYPE_REGISTER;
162 ex->un.rgister.reg = regno;
167 DEBUG_SymbolExpr(const char * name)
171 ex = DEBUG_GetFreeExpr();
173 ex->type = EXPR_TYPE_SYMBOL;
174 ex->un.symbol.name = name;
179 DEBUG_ConstExpr(int value)
183 ex = DEBUG_GetFreeExpr();
185 ex->type = EXPR_TYPE_CONST;
186 ex->un.constant.value = value;
191 DEBUG_StringExpr(const char * str)
195 ex = DEBUG_GetFreeExpr();
197 ex->type = EXPR_TYPE_STRING;
198 ex->un.string.str = str+1;
199 pnt = strrchr(ex->un.string.str, '"');
208 DEBUG_USConstExpr(unsigned int value)
212 ex = DEBUG_GetFreeExpr();
214 ex->type = EXPR_TYPE_CONST;
215 ex->un.u_const.value = value;
220 DEBUG_BinopExpr(int operator_type, struct expr * exp1, struct expr * exp2)
224 ex = DEBUG_GetFreeExpr();
226 ex->type = EXPR_TYPE_BINOP;
227 ex->un.binop.binop_type = operator_type;
228 ex->un.binop.exp1 = exp1;
229 ex->un.binop.exp2 = exp2;
234 DEBUG_UnopExpr(int operator_type, struct expr * exp1)
238 ex = DEBUG_GetFreeExpr();
240 ex->type = EXPR_TYPE_UNOP;
241 ex->un.unop.unop_type = operator_type;
242 ex->un.unop.exp1 = exp1;
247 DEBUG_StructExpr(struct expr * exp, const char * element)
251 ex = DEBUG_GetFreeExpr();
253 ex->type = EXPR_TYPE_STRUCT;
254 ex->un.structure.exp1 = exp;
255 ex->un.structure.element_name = element;
260 DEBUG_StructPExpr(struct expr * exp, const char * element)
264 ex = DEBUG_GetFreeExpr();
266 ex->type = EXPR_TYPE_PSTRUCT;
267 ex->un.structure.exp1 = exp;
268 ex->un.structure.element_name = element;
273 DEBUG_CallExpr(const char * funcname, int nargs, ...)
279 ex = DEBUG_GetFreeExpr();
281 ex->type = EXPR_TYPE_CALL;
282 ex->un.call.funcname = funcname;
283 ex->un.call.nargs = nargs;
286 for(i=0; i < nargs; i++)
288 ex->un.call.arg[i] = va_arg(ap, struct expr *);
295 DEBUG_EvalExpr(struct expr * exp)
301 unsigned int cexp[5];
306 struct datatype * type1;
307 struct datatype * type2;
316 rtn = DEBUG_EvalExpr(exp->un.cast.expr);
317 rtn.type = exp->un.cast.cast;
319 case EXPR_TYPE_STRING:
320 rtn.type = DEBUG_TypeString;
321 rtn.off = (unsigned int) &exp->un.string.str;
324 case EXPR_TYPE_CONST:
325 rtn.type = DEBUG_TypeIntConst;
326 rtn.off = (unsigned int) &exp->un.constant.value;
329 case EXPR_TYPE_US_CONST:
330 rtn.type = DEBUG_TypeUSInt;
331 rtn.off = (unsigned int) &exp->un.u_const.value;
334 case EXPR_TYPE_SYMBOL:
335 if( !DEBUG_GetSymbolValue(exp->un.symbol.name, -1, &rtn, FALSE ) )
342 case EXPR_TYPE_PSTRUCT:
343 exp1 = DEBUG_EvalExpr(exp->un.structure.exp1);
344 if( exp1.type == NULL )
348 rtn.off = DEBUG_TypeDerefPointer(&exp1, &type1);
354 DEBUG_FindStructElement(&rtn, exp->un.structure.element_name,
355 &exp->un.structure.result);
357 case EXPR_TYPE_STRUCT:
358 exp1 = DEBUG_EvalExpr(exp->un.structure.exp1);
359 if( exp1.type == NULL )
364 DEBUG_FindStructElement(&rtn, exp->un.structure.element_name,
365 &exp->un.structure.result);
369 * First, evaluate all of the arguments. If any of them are not
370 * evaluable, then bail.
372 for(i=0; i < exp->un.call.nargs; i++)
374 exp1 = DEBUG_EvalExpr(exp->un.call.arg[i]);
375 if( exp1.type == NULL )
379 cexp[i] = DEBUG_GetExprValue(&exp1, NULL);
383 * Now look up the address of the function itself.
385 if( !DEBUG_GetSymbolValue(exp->un.call.funcname, -1, &rtn, FALSE ) )
387 fprintf(stderr, "Failed to find symbol\n");
391 fptr = (int (*)()) rtn.off;
392 switch(exp->un.call.nargs)
395 exp->un.call.result = (*fptr)();
398 exp->un.call.result = (*fptr)(cexp[0]);
401 exp->un.call.result = (*fptr)(cexp[0], cexp[1]);
404 exp->un.call.result = (*fptr)(cexp[0], cexp[1], cexp[2]);
407 exp->un.call.result = (*fptr)(cexp[0], cexp[1], cexp[2], cexp[3]);
410 exp->un.call.result = (*fptr)(cexp[0], cexp[1], cexp[2], cexp[3], cexp[4]);
413 rtn.type = DEBUG_TypeInt;
414 rtn.off = (unsigned int) &exp->un.call.result;
416 case EXPR_TYPE_REGISTER:
417 rtn.type = DEBUG_TypeIntConst;
418 exp->un.rgister.result = DEBUG_GetRegister(exp->un.rgister.reg);
419 rtn.off = (unsigned int) &exp->un.rgister.result;
420 if( exp->un.rgister.reg == REG_EIP )
421 rtn.seg = CS_reg(&DEBUG_context);
423 rtn.seg = DS_reg(&DEBUG_context);
424 DBG_FIX_ADDR_SEG( &rtn, 0 );
426 case EXPR_TYPE_BINOP:
427 exp1 = DEBUG_EvalExpr(exp->un.binop.exp1);
428 exp2 = DEBUG_EvalExpr(exp->un.binop.exp2);
429 if( exp1.type == NULL || exp2.type == NULL )
433 if( exp1.type == DEBUG_TypeIntConst && exp2.type == DEBUG_TypeIntConst )
435 rtn.type = exp1.type;
439 rtn.type = DEBUG_TypeInt;
441 rtn.off = (unsigned int) &exp->un.binop.result;
442 switch(exp->un.binop.binop_type)
445 type1 = DEBUG_GetPointerType(exp1.type);
446 type2 = DEBUG_GetPointerType(exp2.type);
449 if( type1 != NULL && type2 != NULL )
453 else if( type1 != NULL )
455 scale2 = DEBUG_GetObjectSize(type1);
456 rtn.type = exp1.type;
458 else if( type2 != NULL )
460 scale1 = DEBUG_GetObjectSize(type2);
461 rtn.type = exp2.type;
464 exp->un.binop.result = (VAL(exp1) * scale1 + scale2 * VAL(exp2));
467 type1 = DEBUG_GetPointerType(exp1.type);
468 type2 = DEBUG_GetPointerType(exp2.type);
472 if( type1 != NULL && type2 != NULL )
478 scale3 = DEBUG_GetObjectSize(type1);
480 else if( type1 != NULL )
482 scale2 = DEBUG_GetObjectSize(type1);
483 rtn.type = exp1.type;
486 else if( type2 != NULL )
488 scale1 = DEBUG_GetObjectSize(type2);
489 rtn.type = exp2.type;
492 exp->un.binop.result = (VAL(exp1) - VAL(exp2)) / scale3;
496 exp->un.binop.result = VAL(exp2);
500 exp->un.binop.result = (VAL(exp1) || VAL(exp2));
504 exp->un.binop.result = (VAL(exp1) && VAL(exp2));
508 exp->un.binop.result = (VAL(exp1) | VAL(exp2));
512 exp->un.binop.result = (VAL(exp1) & VAL(exp2));
516 exp->un.binop.result = (VAL(exp1) ^ VAL(exp2));
520 exp->un.binop.result = (VAL(exp1) == VAL(exp2));
524 exp->un.binop.result = (VAL(exp1) > VAL(exp2));
528 exp->un.binop.result = (VAL(exp1) < VAL(exp2));
532 exp->un.binop.result = (VAL(exp1) >= VAL(exp2));
536 exp->un.binop.result = (VAL(exp1) <= VAL(exp2));
540 exp->un.binop.result = (VAL(exp1) != VAL(exp2));
544 exp->un.binop.result = ((unsigned) VAL(exp1) << VAL(exp2));
548 exp->un.binop.result = ((unsigned) VAL(exp1) >> VAL(exp2));
552 exp->un.binop.result = (VAL(exp1) * VAL(exp2));
558 exp->un.binop.result = (VAL(exp1) / VAL(exp2));
571 exp->un.binop.result = (VAL(exp1) % VAL(exp2));
581 DEBUG_ArrayIndex(&exp1, &rtn, VAL(exp2));
588 exp1 = DEBUG_EvalExpr(exp->un.unop.exp1);
589 if( exp1.type == NULL )
593 rtn.off = (unsigned int) &exp->un.unop.result;
594 if( exp1.type == DEBUG_TypeIntConst )
596 rtn.type = exp1.type;
600 rtn.type = DEBUG_TypeInt;
602 switch(exp->un.binop.binop_type)
606 exp->un.unop.result = -VAL(exp1);
610 exp->un.unop.result = !VAL(exp1);
614 exp->un.unop.result = ~VAL(exp1);
618 rtn.off = (unsigned int) DEBUG_TypeDerefPointer(&exp1, &rtn.type);
620 case EXP_OP_FORCE_DEREF:
622 rtn.off = *(unsigned int *) exp1.off;
626 rtn.type = DEBUG_FindOrMakePointerType(exp1.type);
627 exp->un.unop.result = exp1.off;
632 fprintf(stderr,"Unexpected expression.\n");
642 DEBUG_DisplayExpr(struct expr * exp)
650 fprintf(stderr, "((");
651 DEBUG_PrintTypeCast(exp->un.cast.cast);
652 fprintf(stderr, ")");
653 DEBUG_DisplayExpr(exp->un.cast.expr);
654 fprintf(stderr, ")");
656 case EXPR_TYPE_REGISTER:
657 DEBUG_PrintRegister(exp->un.rgister.reg);
659 case EXPR_TYPE_US_CONST:
660 fprintf(stderr, "%ud", exp->un.u_const.value);
662 case EXPR_TYPE_CONST:
663 fprintf(stderr, "%d", exp->un.u_const.value);
665 case EXPR_TYPE_STRING:
666 fprintf(stderr, "\"%s\"", exp->un.string.str);
668 case EXPR_TYPE_SYMBOL:
669 fprintf(stderr, "%s" , exp->un.symbol.name);
671 case EXPR_TYPE_PSTRUCT:
672 DEBUG_DisplayExpr(exp->un.structure.exp1);
673 fprintf(stderr, "->%s", exp->un.structure.element_name);
675 case EXPR_TYPE_STRUCT:
676 DEBUG_DisplayExpr(exp->un.structure.exp1);
677 fprintf(stderr, ".%s", exp->un.structure.element_name);
681 * First, evaluate all of the arguments. If any of them are not
682 * evaluable, then bail.
684 fprintf(stderr, "%s(",exp->un.call.funcname);
685 for(i=0; i < exp->un.call.nargs; i++)
687 DEBUG_DisplayExpr(exp->un.call.arg[i]);
688 if( i != exp->un.call.nargs - 1 )
690 fprintf(stderr, ", ");
693 fprintf(stderr, ")");
695 case EXPR_TYPE_BINOP:
696 fprintf(stderr, "( ");
697 DEBUG_DisplayExpr(exp->un.binop.exp1);
698 switch(exp->un.binop.binop_type)
701 fprintf(stderr, " + ");
704 fprintf(stderr, " - ");
707 fprintf(stderr, ":");
710 fprintf(stderr, " || ");
713 fprintf(stderr, " && ");
716 fprintf(stderr, " | ");
719 fprintf(stderr, " & ");
722 fprintf(stderr, " ^ ");
725 fprintf(stderr, " == ");
728 fprintf(stderr, " > ");
731 fprintf(stderr, " < ");
734 fprintf(stderr, " >= ");
737 fprintf(stderr, " <= ");
740 fprintf(stderr, " != ");
743 fprintf(stderr, " << ");
746 fprintf(stderr, " >> ");
749 fprintf(stderr, " * ");
752 fprintf(stderr, " / ");
755 fprintf(stderr, " %% ");
758 fprintf(stderr, "[");
763 DEBUG_DisplayExpr(exp->un.binop.exp2);
764 if( exp->un.binop.binop_type == EXP_OP_ARR )
766 fprintf(stderr, "]");
768 fprintf(stderr, " )");
771 switch(exp->un.binop.binop_type)
774 fprintf(stderr, "-");
777 fprintf(stderr, "!");
780 fprintf(stderr, "~");
783 fprintf(stderr, "*");
786 fprintf(stderr, "&");
789 DEBUG_DisplayExpr(exp->un.unop.exp1);
792 fprintf(stderr,"Unexpected expression.\n");
801 DEBUG_CloneExpr(struct expr * exp)
806 rtn = (struct expr *) xmalloc(sizeof(struct expr));
809 * First copy the contents of the expression itself.
817 rtn->un.cast.expr = DEBUG_CloneExpr(exp->un.cast.expr);
819 case EXPR_TYPE_REGISTER:
820 case EXPR_TYPE_US_CONST:
821 case EXPR_TYPE_CONST:
823 case EXPR_TYPE_STRING:
824 rtn->un.string.str = xstrdup(exp->un.string.str);
826 case EXPR_TYPE_SYMBOL:
827 rtn->un.symbol.name = xstrdup(exp->un.symbol.name);
829 case EXPR_TYPE_PSTRUCT:
830 case EXPR_TYPE_STRUCT:
831 rtn->un.structure.exp1 = DEBUG_CloneExpr(exp->un.structure.exp1);
832 rtn->un.structure.element_name = xstrdup(exp->un.structure.element_name);
836 * First, evaluate all of the arguments. If any of them are not
837 * evaluable, then bail.
839 for(i=0; i < exp->un.call.nargs; i++)
841 rtn->un.call.arg[i] = DEBUG_CloneExpr(exp->un.call.arg[i]);
843 rtn->un.call.funcname = xstrdup(exp->un.call.funcname);
845 case EXPR_TYPE_BINOP:
846 rtn->un.binop.exp1 = DEBUG_CloneExpr(exp->un.binop.exp1);
847 rtn->un.binop.exp2 = DEBUG_CloneExpr(exp->un.binop.exp2);
850 rtn->un.unop.exp1 = DEBUG_CloneExpr(exp->un.unop.exp1);
853 fprintf(stderr,"Unexpected expression.\n");
863 * Recursively go through an expression tree and free all memory associated
867 DEBUG_FreeExpr(struct expr * exp)
874 DEBUG_FreeExpr(exp->un.cast.expr);
876 case EXPR_TYPE_REGISTER:
877 case EXPR_TYPE_US_CONST:
878 case EXPR_TYPE_CONST:
880 case EXPR_TYPE_STRING:
881 free((char *) exp->un.string.str);
883 case EXPR_TYPE_SYMBOL:
884 free((char *) exp->un.symbol.name);
886 case EXPR_TYPE_PSTRUCT:
887 case EXPR_TYPE_STRUCT:
888 DEBUG_FreeExpr(exp->un.structure.exp1);
889 free((char *) exp->un.structure.element_name);
893 * First, evaluate all of the arguments. If any of them are not
894 * evaluable, then bail.
896 for(i=0; i < exp->un.call.nargs; i++)
898 DEBUG_FreeExpr(exp->un.call.arg[i]);
900 free((char *) exp->un.call.funcname);
902 case EXPR_TYPE_BINOP:
903 DEBUG_FreeExpr(exp->un.binop.exp1);
904 DEBUG_FreeExpr(exp->un.binop.exp2);
907 DEBUG_FreeExpr(exp->un.unop.exp1);
910 fprintf(stderr,"Unexpected expression.\n");