osfmk/i386/pcb_native.c

122         pcb_t			pcb = THREAD_TO_PCB(new);
153 	if (is_saved_state64(pcb->iss)) {
164 		assert(is_saved_state64(pcb->iss));
166 		iss64 = (x86_saved_state64_tagged_t *) pcb->iss;
178 		/* Interrupt stack is pcb */
182 		 * Top of temporary sysenter stack points to pcb stack.
206 		if ((pcb->cthread_self != 0) || (new->task != kernel_task)) {
207 			if ((cdp->cpu_uber.cu_user_gs_base != pcb->cthread_self) || (pcb->cthread_self != rdmsr64(MSR_IA32_KERNEL_GS_BASE))) {
208 				cdp->cpu_uber.cu_user_gs_base = pcb->cthread_self;
209 				wrmsr64(MSR_IA32_KERNEL_GS_BASE, pcb->cthread_self);
216 		assert(is_saved_state32(pcb->iss));
217 		iss32compat = (x86_saved_state_compat32_t *) pcb->iss;
230 		/* Top of temporary sysenter stack points to pcb stack */
233 		/* Interrupt stack is pcb */
241 		cdp->cpu_uber_arg_store_valid = (vm_offset_t)&pcb->arg_store_valid;
242 		pcb->arg_store_valid = 0;
258 		ldtp[sel_idx(USER_CTHREAD)] = pcb->cthread_desc;
259 		if (pcb->uldt_selector != 0)
260 			ldtp[sel_idx(pcb->uldt_selector)] = pcb->uldt_desc;
261 		cdp->cpu_uber.cu_user_gs_base = pcb->cthread_self;
293 			((unsigned long)pcb->iss & PAGE_MASK));
297 		pmap_high_map(pcb->iss_pte0, HIGH_CPU_ISS0);
298 		pmap_high_map(pcb->iss_pte1, HIGH_CPU_ISS1);
306 		 * For fast syscall, top of interrupt stack points to pcb stack
312 	} else if (is_saved_state64(pcb->iss)) {
323 		assert(is_saved_state64(pcb->iss));
325 		iss64 = (x86_saved_state64_tagged_t *) pcb->iss;
336 		/* Interrupt stack is pcb */
340 		 * Top of temporary sysenter stack points to pcb stack.
359 		assert(is_saved_state32(pcb->iss));
360 		iss32compat = (x86_saved_state_compat32_t *) pcb->iss;
373 		/* Top of temporary sysenter stack points to pcb stack */
376 		/* Interrupt stack is pcb */
384 		cdp->cpu_uber_arg_store_valid = UBER64((vm_offset_t)&pcb->arg_store_valid);
385 		pcb->arg_store_valid = 0;
402 	ldtp[sel_idx(USER_CTHREAD)] = pcb->cthread_desc;
403 	if (pcb->uldt_selector != 0)
404 		ldtp[sel_idx(pcb->uldt_selector)] = pcb->uldt_desc;
410 	cdp->cpu_uber.cu_user_gs_base = pcb->cthread_self;
521         pcb_t			pcb = THREAD_TO_PCB(thread);
534 	if (pcb->sf == NULL) {
536 		pcb->sf = zalloc(iss_zone);
537 		if (pcb->sf == NULL)
544 		sf64 = (x86_sframe64_t *) pcb->sf;
563 			sfc32 = (x86_sframe_compat32_t *)pcb->sf;
581 			sf32 = (x86_sframe32_t *) pcb->sf;
588 			pcb->iss_pte0 = pte_kernel_rw(kvtophys((vm_offset_t)iss));
590 			        pcb->iss_pte1 = INTEL_PTE_INVALID;
592 	      			pcb->iss_pte1 = pte_kernel_rw(paddr);
596 			pcb->cthread_desc = ldtp[sel_idx(USER_DS)];
597 			pcb->uldt_desc = ldtp[sel_idx(USER_DS)];
613 	pcb->iss = iss;
615 	simple_lock_init(&pcb->lock, 0);
617 	pcb->arg_store_valid = 0;
618 	pcb->cthread_self = 0;
619 	pcb->uldt_selector = 0;
624 	if ((pcb->cthread_desc.access & ACC_P) == 0) {
627 		pcb->cthread_desc = ldtp[sel_idx(USER_DS)];
640 	register pcb_t	pcb = THREAD_TO_PCB(thread);
642 	if (pcb->ifps != 0)
643 		fpu_free(pcb->ifps);
644 	if (pcb->sf != 0) {
645 		zfree(iss_zone, pcb->sf);
646 		pcb->sf = 0;
648 	if (pcb->ids) {
649 		zfree(ids_zone, pcb->ids);
650 		pcb->ids = NULL;