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debug.cc

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/*
   debug.cc

   A pathetic copy of the DOS debug program. OK for testing io ports.
   There is probably a better shareware version somewhere.
   Always compile with optimization so inb outb work.

   Modification History:

   13-Jan-2000 WPS created.
*/


#ifndef linux

#include <stdio.h>
#include <stdlib.h>

int main()
{
  printf("debug doesn't work on this platform.\n");
  exit(-1);
}

#else

#include <unistd.h>
#include <sys/io.h>             // ioperm(), inb outb, inw outw
#include <sys/types.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <signal.h>


int main(int argc, char **argv)
{
  if(geteuid() && getuid())
    {
      printf("Must be root for this program to work.\n");
      exit(-1);
    }

  if(-1 == iopl(3))
    {
      printf("Can't set privaledge level.\n");
    }
  printf("Commands: (Use 0x for Hexidecimal).\n");
  printf("\t inb <port>\n");
  printf("\t outb <port> <value>\n");
  printf("\t inw <port>\n");
  printf("\t outw <port> <value>\n");
  printf("\t quit\n\n");

    unsigned long port;
  char cval;
  short sval;
  unsigned long uval;

  while(1)
    {
      printf("\ndebug>");
      char buf[200];
      fgets(buf,200,stdin);
      char *cmd = buf;
      while(*cmd == ' ')
        {
          cmd++;
        }
      if(*cmd == 0 || *cmd == '\r' || *cmd == '\n')
        {
          continue;
        }
      if(!strncmp(cmd,"inb",3))
        {
          port = strtol(cmd+4,0,0);
          ioperm(port,1,1);
          cval = inb(port);
          ioperm(port,1,0);
          uval = ((unsigned long) cval) & 0xFF;
          printf("0x%X\n",uval);
        }
      else if(!strncmp(cmd,"outb",4))
        {
          char *e1;
          port = strtol(cmd+5, &e1,0);
          cval = strtol(e1+1,0,0);
          uval = ((unsigned long) cval) & 0xFF;
          printf("0x%X 0x%X\n",port,uval);
          ioperm(port,1,1);
          outb(cval,port);
          ioperm(port,1,0);
        }
      else if(!strncmp(cmd,"inw",3))
        {
          port = strtol(cmd+4,0,0);
          ioperm(port,2,1);
          sval = inw(port);
          ioperm(port,2,0);
          uval = ((unsigned long) sval) & 0xFFFF;
          printf("0x%X\n",uval);
        }
      else if(!strncmp(cmd,"outw",4))
        {
          char *e1;
          port = strtol(cmd+5, &e1,0);
          sval = strtol(e1+1,0,0);
          uval = ((unsigned long) sval) & 0xFFFF;
          printf("0x%X 0x%X\n",port,uval);
          ioperm(port,2,1);
          outw(sval,port);
          ioperm(port,2,0);
        }
      else if(!strncmp(cmd,"quit",4))
        {
          break;
        }
    }
}
#endif

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