127 	struct machpcb *mpcb;  in lwp_stk_init()  local
136 	mpcb = (struct machpcb *)stk;  in lwp_stk_init()
137 	bzero(mpcb, sizeof (struct machpcb));  in lwp_stk_init()
139 	lwp->lwp_regs = (void *)&mpcb->mpcb_regs;  in lwp_stk_init()
141 	mpcb->mpcb_fpu = fp;  in lwp_stk_init()
142 	mpcb->mpcb_fpu->fpu_q = mpcb->mpcb_fpu_q;  in lwp_stk_init()
143 	mpcb->mpcb_thread = lwp->lwp_thread;  in lwp_stk_init()
144 	mpcb->mpcb_wbcnt = 0;  in lwp_stk_init()
146 		mpcb->mpcb_wstate = WSTATE_USER32;  in lwp_stk_init()
147 		mpcb->mpcb_wbuf = kmem_cache_alloc(wbuf32_cache, KM_SLEEP);  in lwp_stk_init()
149 		mpcb->mpcb_wstate = WSTATE_USER64;  in lwp_stk_init()
150 		mpcb->mpcb_wbuf = kmem_cache_alloc(wbuf64_cache, KM_SLEEP);  in lwp_stk_init()
152 	ASSERT(((uintptr_t)mpcb->mpcb_wbuf & 7) == 0);  in lwp_stk_init()
153 	mpcb->mpcb_wbuf_pa = va_to_pa(mpcb->mpcb_wbuf);  in lwp_stk_init()
154 	mpcb->mpcb_pa = va_to_pa(mpcb);  in lwp_stk_init()
161 	struct machpcb *mpcb = lwptompcb(lwp);  in lwp_stk_fini()  local
167 	mpcb->mpcb_wbcnt = 0;  in lwp_stk_fini()
168 	if (mpcb->mpcb_wstate == WSTATE_USER32)  in lwp_stk_fini()
169 		kmem_cache_free(wbuf32_cache, mpcb->mpcb_wbuf);  in lwp_stk_fini()
171 		kmem_cache_free(wbuf64_cache, mpcb->mpcb_wbuf);  in lwp_stk_fini()
172 	mpcb->mpcb_wbuf = NULL;  in lwp_stk_fini()
173 	mpcb->mpcb_wbuf_pa = -1;  in lwp_stk_fini()
184 	struct machpcb *mpcb = lwptompcb(clwp);  in lwp_forkregs()  local
190 	t = mpcb->mpcb_thread;  in lwp_forkregs()
195 	fp = mpcb->mpcb_fpu;  in lwp_forkregs()
196 	wbuf = mpcb->mpcb_wbuf;  in lwp_forkregs()
197 	wstate = mpcb->mpcb_wstate;  in lwp_forkregs()
203 	mpcb->mpcb_thread = t;  in lwp_forkregs()
204 	mpcb->mpcb_fpu = fp;  in lwp_forkregs()
205 	fp->fpu_q = mpcb->mpcb_fpu_q;  in lwp_forkregs()
213 	if (mpcb->mpcb_wstate != wstate) {  in lwp_forkregs()
225 	mpcb->mpcb_pa = va_to_pa(mpcb);  in lwp_forkregs()
226 	mpcb->mpcb_wbuf = wbuf;  in lwp_forkregs()
227 	mpcb->mpcb_wbuf_pa = va_to_pa(wbuf);  in lwp_forkregs()
229 	ASSERT(mpcb->mpcb_wstate == wstate);  in lwp_forkregs()
231 	if (mpcb->mpcb_wbcnt != 0) {  in lwp_forkregs()
232 		bcopy(pmpcb->mpcb_wbuf, mpcb->mpcb_wbuf,  in lwp_forkregs()
233 		    mpcb->mpcb_wbcnt * ((mpcb->mpcb_wstate == WSTATE_USER32) ?  in lwp_forkregs()