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Show First 20 Lines • Show All 118 Lines • ▼ Show 20 Lines	cpu_fork(struct thread td1, struct proc p2, struct thread *td2, int flags)
if ((flags & RFPROC) == 0)		if ((flags & RFPROC) == 0)
return;		return;

/* Ensure td1 is up to date before copy. */		/* Ensure td1 is up to date before copy. */
if (td1 == curthread)		if (td1 == curthread)
cpu_update_pcb(td1);		cpu_update_pcb(td1);

pcb = (struct pcb *)((td2->td_kstack +		pcb = (struct pcb *)((td2->td_kstack +
td2->td_kstack_pages * PAGE_SIZE - sizeof(struct pcb)) & ~0x2fUL);		td2->td_kstack_pages * PAGE_SIZE - sizeof(struct pcb)) & ~0x3fUL);
td2->td_pcb = pcb;		td2->td_pcb = pcb;

/* Copy the pcb */		/* Copy the pcb */
bcopy(td1->td_pcb, pcb, sizeof(struct pcb));		bcopy(td1->td_pcb, pcb, sizeof(struct pcb));

/*		/*
* Create a fresh stack for the new process.		* Create a fresh stack for the new process.
* Copy the trap frame for the return to user mode as if from a		* Copy the trap frame for the return to user mode as if from a
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