debugger/stack.c

   1 /*
   2  * Debugger stack handling
   3  *
   4  * Copyright 1995 Alexandre Julliard
   5  */
   6
   7 #include <stdio.h>
   8 #include "windows.h"
   9 #include "debugger.h"
  10
  11
  12 typedef struct
  13 {
  14     WORD bp;
  15     WORD ip;
  16     WORD cs;
  17 } FRAME16;
  18
  19 typedef struct
  20 {
  21     DWORD bp;
  22     DWORD ip;
  23     WORD cs;
  24 } FRAME32;
  25
  26
  27
  28 /***********************************************************************
  29  *           DEBUG_InfoStack
  30  *
  31  * Dump the top of the stack
  32  */
  33 void DEBUG_InfoStack(void)
  34 {
  35     DBG_ADDR addr;
  36
  37     fprintf(stderr,"Stack dump:\n");
  38     if ((SS_reg(DEBUG_context) == WINE_DATA_SELECTOR) ||
  39         (GET_SEL_FLAGS(SS_reg(DEBUG_context)) & LDT_FLAGS_32BIT))
  40     {  /* 32-bit mode */
  41         addr.seg = 0;
  42         addr.off = ESP_reg(DEBUG_context);
  43         DEBUG_ExamineMemory( &addr, 24, 'x' );
  44     }
  45     else  /* 16-bit mode */
  46     {
  47         addr.seg = SS_reg(DEBUG_context);
  48         addr.off = SP_reg(DEBUG_context);
  49         DEBUG_ExamineMemory( &addr, 24, 'w' );
  50     }
  51     fprintf(stderr,"\n");
  52 }
  53
  54
  55 /***********************************************************************
  56  *           DEBUG_BackTrace
  57  *
  58  * Display a stack back-trace.
  59  */
  60 void DEBUG_BackTrace(void)
  61 {
  62     DBG_ADDR addr;
  63     int frameno = 0;
  64
  65     fprintf(stderr,"Backtrace:\n");
  66     if (SS_reg(DEBUG_context) == WINE_DATA_SELECTOR)  /* 32-bit mode */
  67     {
  68         addr.seg = 0;
  69         fprintf(stderr,"%d ",frameno++);
  70         addr.off = EIP_reg(DEBUG_context);
  71         DEBUG_PrintAddress( &addr, 32 );
  72         fprintf( stderr, "\n" );
  73         addr.off = EBP_reg(DEBUG_context);
  74         while (addr.off)
  75         {
  76             FRAME32 *frame = (FRAME32 *)addr.off;
  77             if (!DBG_CHECK_READ_PTR( &addr, sizeof(FRAME32) )) return;
  78             if (!frame->ip) break;
  79             fprintf(stderr,"%d ",frameno++);
  80             addr.off = frame->ip;
  81             DEBUG_PrintAddress( &addr, 32 );
  82             fprintf( stderr, "\n" );
  83             addr.off = frame->bp;
  84         }
  85     }
  86     else  /* 16-bit mode */
  87     {
  88       WORD ss = SS_reg(DEBUG_context), cs = CS_reg(DEBUG_context);
  89       if (GET_SEL_FLAGS(ss) & LDT_FLAGS_32BIT)
  90       {
  91           fprintf( stderr, "Not implemented: 32-bit backtrace on a different stack segment.\n" );
  92           return;
  93       }
  94       fprintf( stderr,"%d ", frameno++ );
  95       addr.seg = cs;
  96       addr.off = IP_reg(DEBUG_context);
  97       DEBUG_PrintAddress( &addr, 16 );
  98       fprintf( stderr, "\n" );
  99       addr.seg = ss;
 100       addr.off = BP_reg(DEBUG_context) & ~1;
 101       for (;;)
 102       {
 103           FRAME16 *frame = (FRAME16 *)DBG_ADDR_TO_LIN(&addr);
 104           if (!DBG_CHECK_READ_PTR( &addr, sizeof(FRAME16) )) return;
 105           if (!frame->bp) break;
 106           if (frame->bp & 1) cs = frame->cs;
 107           fprintf( stderr,"%d ", frameno++ );
 108           addr.seg = cs;
 109           addr.off = frame->ip;
 110           DEBUG_PrintAddress( &addr, 16 );
 111           fprintf( stderr, "\n" );
 112           addr.seg = ss;
 113           addr.off = frame->bp & ~1;
 114       }
 115   }
 116   fprintf( stderr, "\n" );
 117 }