392 	struct pcb *pcb = &clwp->lwp_pcb;  in lwp_forkregs()  local
395 	if (pcb->pcb_rupdate == 0) {  in lwp_forkregs()
396 		pcb->pcb_ds = rp->r_ds;  in lwp_forkregs()
397 		pcb->pcb_es = rp->r_es;  in lwp_forkregs()
398 		pcb->pcb_fs = rp->r_fs;  in lwp_forkregs()
399 		pcb->pcb_gs = rp->r_gs;  in lwp_forkregs()
400 		pcb->pcb_rupdate = 1;  in lwp_forkregs()
462 	pcb_t *pcb = &lwp->lwp_pcb;  in lwp_segregs_save()  local
465 	ASSERT(VALID_LWP_DESC(&pcb->pcb_fsdesc));  in lwp_segregs_save()
466 	ASSERT(VALID_LWP_DESC(&pcb->pcb_gsdesc));  in lwp_segregs_save()
468 	if (pcb->pcb_rupdate == 0) {  in lwp_segregs_save()
478 		pcb->pcb_ds = rp->r_ds;  in lwp_segregs_save()
479 		pcb->pcb_es = rp->r_es;  in lwp_segregs_save()
480 		pcb->pcb_fs = rp->r_fs;  in lwp_segregs_save()
481 		pcb->pcb_gs = rp->r_gs;  in lwp_segregs_save()
482 		pcb->pcb_rupdate = 1;  in lwp_segregs_save()
511 	pcb_t *pcb = &lwp->lwp_pcb;  in update_sregs()  local
528 		    pcb->pcb_gs) != 0) {  in update_sregs()
533 		rp->r_gs = pcb->pcb_gs;  in update_sregs()
542 		__set_gs(pcb->pcb_gs);  in update_sregs()
557 		rp->r_gs = pcb->pcb_gs;  in update_sregs()
583 		if (pcb->pcb_gs == LWPGS_SEL || pcb->pcb_gs == 0) {  in update_sregs()
586 			    pcb->pcb_gsbase)) {  in update_sregs()
591 			wrmsr(MSR_AMD_KGSBASE, pcb->pcb_gsbase);  in update_sregs()
595 		__set_ds(pcb->pcb_ds);  in update_sregs()
596 		rp->r_ds = pcb->pcb_ds;  in update_sregs()
598 		__set_es(pcb->pcb_es);  in update_sregs()
599 		rp->r_es = pcb->pcb_es;  in update_sregs()
601 		__set_fs(pcb->pcb_fs);  in update_sregs()
602 		rp->r_fs = pcb->pcb_fs;  in update_sregs()
607 		if (pcb->pcb_fs == LWPFS_SEL || pcb->pcb_fs == 0) {  in update_sregs()
610 			    pcb->pcb_fsbase)) {  in update_sregs()
615 			wrmsr(MSR_AMD_FSBASE, pcb->pcb_fsbase);  in update_sregs()
708 	pcb_t *pcb = &lwp->lwp_pcb;  in lwp_segregs_restore()  local
710 	ASSERT(VALID_LWP_DESC(&pcb->pcb_fsdesc));  in lwp_segregs_restore()
711 	ASSERT(VALID_LWP_DESC(&pcb->pcb_gsdesc));  in lwp_segregs_restore()
717 	gdt_update_usegd(GDT_LWPFS, &pcb->pcb_fsdesc);  in lwp_segregs_restore()
718 	gdt_update_usegd(GDT_LWPGS, &pcb->pcb_gsdesc);  in lwp_segregs_restore()
729 	pcb_t *pcb = &lwp->lwp_pcb;  in lwp_segregs_restore32()  local
735 	gdt_update_usegd(GDT_LWPFS, &pcb->pcb_fsdesc);  in lwp_segregs_restore32()
736 	gdt_update_usegd(GDT_LWPGS, &pcb->pcb_gsdesc);  in lwp_segregs_restore32()
897 	pcb_t *pcb = &lwp->lwp_pcb;  in setregs()  local
915 	pcb->pcb_fs = pcb->pcb_gs = 0;  in setregs()
916 	pcb->pcb_fsbase = pcb->pcb_gsbase = 0;  in setregs()
932 		pcb->pcb_fsdesc = pcb->pcb_gsdesc = zero_udesc;  in setregs()
951 		pcb->pcb_fsdesc = pcb->pcb_gsdesc = zero_u32desc;  in setregs()
962 	pcb->pcb_ds = rp->r_ds;  in setregs()
963 	pcb->pcb_es = rp->r_es;  in setregs()
964 	pcb->pcb_rupdate = 1;  in setregs()
976 	pcb->pcb_fsdesc = pcb->pcb_gsdesc = zero_udesc;  in setregs()
995 	pcb->pcb_fpu.fpu_flags = 0;  in setregs()