debugger/break.c

   1
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4
   5 #define N_BP 25
   6
   7 struct wine_bp{
   8   unsigned long addr;
   9   char in_use;
  10   char enabled;
  11   unsigned char databyte;
  12 };
  13
  14 static struct wine_bp wbp[N_BP] = {{0,},};
  15
  16 void info_break()
  17 {
  18   int j;
  19   fprintf(stderr,"Breakpoint status\n");
  20   for(j=0; j<N_BP; j++)
  21     if(wbp[j].in_use)
  22       fprintf(stderr,"%d: %c %8.8x\n", j, (wbp[j].enabled ? 'y' : 'n'),
  23               wbp[j].addr);
  24 }
  25
  26 void disable_break(int bpnum)
  27 {
  28   if(bpnum >= N_BP || bpnum < 0)
  29     fprintf(stderr,"Breakpoint number out of range\n");
  30
  31   wbp[bpnum].enabled = 0;
  32 }
  33
  34 void enable_break(int bpnum)
  35 {
  36   if(bpnum >= N_BP || bpnum < 0)
  37     fprintf(stderr,"Breakpoint number out of range\n");
  38
  39   wbp[bpnum].enabled = 1;
  40 }
  41
  42 void add_break(unsigned long addr)
  43 {
  44   int j;
  45   for(j=0; j<N_BP; j++)
  46     if(!wbp[j].in_use)
  47       {
  48         wbp[j].in_use = 1;
  49         wbp[j].enabled = 1;
  50         wbp[j].addr = addr;
  51         return;
  52       }
  53   fprintf(stderr,"No more breakpoints\n");
  54 }
  55
  56 void insert_break(int flag)
  57 {
  58   unsigned char * pnt;
  59   int j;
  60
  61   for(j=0; j<N_BP; j++)
  62     if(wbp[j].enabled)
  63       {
  64         pnt = (unsigned char *) wbp[j].addr;
  65         if(flag) {
  66           wbp[j].databyte = *pnt;
  67           *pnt = 0xcc;  /* Change to an int 3 instruction */
  68         } else {
  69           *pnt = wbp[j].databyte;
  70         }
  71       }
  72 }
  73
  74 /* Get the breakpoint number that we broke upon */
  75 int get_bpnum(unsigned int addr)
  76 {
  77   int j;
  78
  79   for(j=0; j<N_BP; j++)
  80     if(wbp[j].enabled)
  81       if(wbp[j].addr == addr) return j;
  82
  83   return -1;
  84 }