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         addr.off = EBP_reg(DEBUG_context);
  70         for (;;)
  71         {
  72             FRAME32 *frame = (FRAME32 *)addr.off;
  73             if (!DBG_CHECK_READ_PTR( &addr, sizeof(FRAME32) )) return;
  74             if (!frame->ip) break;
  75             fprintf(stderr,"%d ",frameno++);
  76             addr.off = frame->ip;
  77             DEBUG_PrintAddress( &addr, 32 );
  78             fprintf( stderr, "\n" );
  79             addr.off = frame->bp;
  80         }
  81     }
  82     else  /* 16-bit mode */
  83     {
  84       WORD ss = SS_reg(DEBUG_context), cs = CS_reg(DEBUG_context);
  85       if (GET_SEL_FLAGS(ss) & LDT_FLAGS_32BIT)
  86       {
  87           fprintf( stderr, "Not implemented: 32-bit backtrace on a different stack segment.\n" );
  88           return;
  89       }
  90       addr.seg = SS_reg(DEBUG_context);
  91       addr.off = BP_reg(DEBUG_context) & ~1;
  92       for (;;)
  93       {
  94           FRAME16 *frame = (FRAME16 *)DBG_ADDR_TO_LIN(&addr);
  95           if (!DBG_CHECK_READ_PTR( &addr, sizeof(FRAME16) )) return;
  96           if (!frame->bp) break;
  97           if (frame->bp & 1) cs = frame->cs;
  98           fprintf( stderr,"%d ", frameno++ );
  99           addr.seg = cs;
 100           addr.off = frame->ip;
 101           DEBUG_PrintAddress( &addr, 16 );
 102           fprintf( stderr, "\n" );
 103           addr.seg = ss;
 104           addr.off = frame->bp & ~1;
 105       }
 106   }
 107   fprintf( stderr, "\n" );
 108 }