moved stacktrace to sysctl, as vmctl is very privileged so can't

be used outside VM. IS code cleanup. added stacktrace feature to IS.

kernel/arch/i386/exception.c

@@ -174,7 +174,7 @@ PUBLIC void proc_stacktrace(struct proc *proc)
 
 	v_bp = proc->p_reg.fp;
 
-	kprintf("%s / %d pc 0x%lx stack ",
+	kprintf("%8.8s %6d 0x%lx ",
 		proc->p_name, proc->p_endpoint, proc->p_reg.pc);
 
 	while(v_bp) {

kernel/system/do_sysctl.c

@@ -19,8 +19,8 @@ register message *m_ptr;	/* pointer to request message */
   phys_bytes ph;
   vir_bytes len, buf;
   static char mybuf[DIAG_BUFSIZE];
-  struct proc *caller;
-  int s, i;
+  struct proc *caller, *target;
+  int s, i, proc_nr;
 
   caller = proc_addr(who_p);
 
@@ -45,7 +45,11 @@ register message *m_ptr;	/* pointer to request message */
 		kputc(mybuf[i]);
 	kputc(END_OF_KMESS);
 	return OK;
-        break;
+    case SYSCTL_CODE_STACKTRACE:
+	if(!isokendpt(m_ptr->SYSCTL_ARG2, &proc_nr))
+		return EINVAL;
+	proc_stacktrace(proc_addr(proc_nr));
+	return OK;
     default:
 	kprintf("do_sysctl: invalid request %d\n", m_ptr->SYSCTL_CODE);
         return(EINVAL);

kernel/system/do_vmctl.c

@@ -97,10 +97,6 @@ kprintf("SYSTEM: request %d:0x%lx-0x%lx, wrflag %d, failed\n",
 	case VMCTL_NOPAGEZERO:
 		return OK;
 #endif
-	case VMCTL_STACKTRACE:
-		kprintf("vmctl stacktrace ");
-		proc_stacktrace(p);
-		return OK;
   }
 
   /* Try architecture-specific vmctls. */