Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!mcsun!unido!mikros!mwtech!joerg
From: joerg@mwtech.UUCP (Joerg Werner)
Newsgroups: comp.os.minix
Subject: c68 has a switch bug
Message-ID: <1087@mwtech.UUCP>
Date: 27 Feb 91 13:25:13 GMT
Reply-To: joerg@mwtech.UUCP (Joerg Werner)
Organization: MIKROS Systemware, Darmstadt/W-Germany
Lines: 48


I use c68 all the time and I like it. But after I compiled the
complete Minix-ST 1.5 operating system, mdb (the Minix debugger)
doesn't work any longer.

Please have a look at the following programm:

testswitch(i)
{
  printf("%2d ", i);
  switch(i) {	/* such a switch occurs in kernel/system.c do_trace() */
    case -1:
    case  1:
    case  2:
    case  3:
    case  4:
    case  5:
    case  6:
    case  7:
    case  9: printf(":-)\n"); break;
    default: printf(":-(\n"); break;
  }
}

main()
{
  testswitch(-1);
}

You and I expect that the result would be

-1 :-)

but the result is

-1 :-(

(BTW: ACK handles this right!)

Is this problem known and is there a fix?

Ciao, Joerg

PS: Which programs must be compiled again, if the process-struct in the
    kernel is changed? The well-known ones are `ps' and `mdb'. Any others?
-- 
Joerg Werner, email: joerg@mwtech.UUCP, voice: 49-(0)6151-37 33 66