void
cpu_lwp_exit(void)
{
struct thread *td = curthread;
struct pcb *pcb;
npxexit();
pcb = td->td_pcb;
/* Some i386 functionality was dropped */
KKASSERT(pcb->pcb_ext == NULL);
/*
* disable all hardware breakpoints
*/
if (pcb->pcb_flags & PCB_DBREGS) {
reset_dbregs();
pcb->pcb_flags &= ~PCB_DBREGS;
}
td->td_gd->gd_cnt.v_swtch++;
crit_enter_quick(td);
if (td->td_flags & TDF_TSLEEPQ)
tsleep_remove(td);
lwkt_deschedule_self(td);
lwkt_remove_tdallq(td);
cpu_thread_exit();
}
/*
* Userland override of lwkt_exit. The only difference is
* the manipulation of gd->gd_num_threads;
*/
void
lwkt_exit(void)
{
thread_t td = curthread;
globaldata_t gd = mycpu;
if (td->td_flags & TDF_VERBOSE)
printf("kthread %p %s has exited\n", td, td->td_comm);
crit_enter();
lwkt_deschedule_self(td);
++gd->gd_tdfreecount;
if (td->td_flags & TDF_SYSTHREAD)
--gd->gd_sys_threads;
--gd->gd_num_threads;
TAILQ_INSERT_TAIL(&gd->gd_tdfreeq, td, td_threadq);
cpu_thread_exit();
}
void
cpu_lwp_exit(void)
{
struct thread *td = curthread;
struct pcb *pcb;
struct pcb_ext *ext;
/*
* If we were using a private TSS do a forced-switch to ourselves
* to switch back to the common TSS before freeing it.
*/
pcb = td->td_pcb;
if ((ext = pcb->pcb_ext) != NULL) {
crit_enter();
pcb->pcb_ext = NULL;
lwkt_switch_return(td->td_switch(td));
crit_exit();
kmem_free(&kernel_map, (vm_offset_t)ext, ctob(IOPAGES + 1));
}
user_ldt_free(pcb);
if (pcb->pcb_flags & PCB_DBREGS) {
/*
* disable all hardware breakpoints
*/
reset_dbregs();
pcb->pcb_flags &= ~PCB_DBREGS;
}
td->td_gd->gd_cnt.v_swtch++;
crit_enter_quick(td);
if (td->td_flags & TDF_TSLEEPQ)
tsleep_remove(td);
lwkt_deschedule_self(td);
lwkt_remove_tdallq(td);
cpu_thread_exit();
}
