debugger/dbg.y

   1
   2 %{
   3
   4 /* Parser for command lines in the Wine debugger
   5  *
   6  * Version 1.0
   7  * Eric Youngdale
   8  * 9/93
   9  */
  10
  11 #include <stdio.h>
  12 #define YYSTYPE int
  13
  14 #include "regpos.h"
  15 extern FILE * yyin;
  16 unsigned int * regval = NULL;
  17 unsigned int dbg_mask = 0;
  18 unsigned int dbg_mode = 0;
  19
  20 void issue_prompt();
  21 %}
  22
  23
  24 %token CONT
  25 %token QUIT
  26 %token HELP
  27 %token INFO
  28 %token STACK
  29 %token REG
  30 %token REGS
  31 %token NUM
  32 %token SET
  33 %token PRINT
  34 %token IDENTIFIER
  35 %token NO_SYMBOL
  36 %token SYMBOLFILE
  37 %token DEFINE
  38
  39 %%
  40
  41  input:  /* empty */
  42         | input line  { issue_prompt(); }
  43
  44  line:          '\n'
  45         | infocmd '\n'
  46         | error '\n'       {yyerrok; }
  47         | QUIT  '\n'       { exit(0); };
  48         | HELP  '\n'       { dbg_help(); };
  49         | CONT '\n'        { return; };
  50         | SYMBOLFILE IDENTIFIER '\n' { read_symboltable($2); };
  51         | DEFINE IDENTIFIER expr '\n'  { add_hash($2, $3); };
  52         | x_command
  53         | print_command
  54         | deposit_command
  55
  56 deposit_command:
  57         SET REG '=' expr '\n' { regval[$2] = $4; }
  58         | SET '*' expr '=' expr '\n' { *((unsigned int *) $3) = $5; }
  59         | SET symbol '=' expr '\n' { *((unsigned int *) $2) = $4; }
  60
  61
  62 x_command:
  63           'x' expr  '\n' { examine_memory($2, 1, 'x'); };
  64         | 'x' '/' fmt expr  '\n' { examine_memory($4, 1, $3); };
  65         | 'x' '/' NUM fmt expr  '\n' { examine_memory($5, $3, $4); };
  66
  67  print_command:
  68         PRINT expr  '\n' { examine_memory(((unsigned int) &$2 ), 1, 'x'); };
  69
  70  fmt:  'x'     { $$ = 'x'; }
  71         | 'd'  { $$ = 'd'; }
  72         | 'i'  { $$ = 'i'; }
  73         | 'w'  { $$ = 'w'; }
  74         | 's'  { $$ = 's'; }
  75         | 'c'  { $$ = 'c'; }
  76         | 'b' { $$ = 'b'; }
  77
  78  symbol: IDENTIFIER             { $$ = find_hash($1);
  79                                    if($$ == 0xffffffff) {
  80                                            fprintf(stderr,"Symbol %s not found\n", $1);
  81                                            YYERROR;
  82                                    };
  83                                 };
  84
  85  expr:  NUM                     { $$ = $1;      }
  86         | REG                   { $$ = regval[$1]; }
  87         | symbol                { $$ = *((unsigned int *) $1); }
  88         | expr '+' NUM          { $$ = $1 + $3; }
  89         | expr '-' NUM          { $$ = $1 - $3; };
  90         | '(' expr ')'          { $$ = $2; };
  91         | '*' expr              { $$ = *((unsigned int *) $2); };
  92
  93  infocmd: INFO REGS { info_reg(); }
  94         | INFO STACK  { info_stack(); };
  95
  96
  97 %%
  98
  99 void
 100 issue_prompt(){
 101 #ifndef USE_READLINE
 102         fprintf(stderr,"Wine-dbg>");
 103 #endif
 104 }
 105
 106 static int loaded_symbols = 0;
 107
 108 void
 109 wine_debug(int * regs)
 110 {
 111         int i;
 112 #ifdef YYDEBUG
 113         yydebug = 0;
 114 #endif
 115         yyin = stdin;
 116         regval = regs;
 117
 118 #ifdef linux
 119         if((SC_CS & 7) != 7) {
 120                 dbg_mask = 0xffffffff;
 121                 dbg_mode = 32;
 122         } else {
 123                 dbg_mask = 0xffff;
 124                 dbg_mode = 16;
 125         };
 126 #endif
 127 #ifdef __NetBSD__
 128         if(SC_CS == 0x1f) {
 129                 dbg_mask = 0xffffffff;
 130                 dbg_mode = 32;
 131         } else {
 132                 dbg_mask = 0xffff;
 133                 dbg_mode = 16;
 134         };
 135 #endif
 136
 137         /* This is intended to read the entry points from the Windows image, and
 138            insert them in the hash table.  It does not work yet, so it is commented out. */
 139 #if 0
 140         if(!loaded_symbols){
 141                 loaded_symbols++;
 142                 load_entrypoints();
 143         };
 144 #endif
 145
 146         /* Show where we crashed */
 147         examine_memory(SC_EIP(dbg_mask), 1, 'i');
 148
 149         issue_prompt();
 150
 151         yyparse();
 152         flush_symbols();
 153         fprintf(stderr,"Returning to Wine...\n");
 154
 155 }
 156
 157
 158 yyerror(char * s){
 159         fprintf(stderr,"%s\n", s);
 160 }
 161