Don't kill process when inside kernel.

This commit is contained in:
rsc 2006-07-16 02:09:45 +00:00
parent 4ed974f5ea
commit 72fef4f855

11
trap.c
View file

@ -70,11 +70,18 @@ trap(struct Trapframe *tf)
lapic_timerintr();
if(cpus[cpu()].nlock)
panic("timer interrupt while holding a lock");
if(cp){
if((read_eflags() & FL_IF) == 0)
panic("timer interrupt but interrupts now disabled");
if(cp->killed)
if(cp){
// Force process exit if it has been killed
// and the interrupt came from user space.
// (If the kernel was executing at time of interrupt,
// don't kill the process. Let the process get back
// out to its regular system call return.)
if((tf->tf_cs&3) == 3 && cp->killed)
proc_exit();
// Force process to give up CPU and let others run.
if(cp->state == RUNNING)
yield();
}