1991/0717/ss/trap.c (diff list | history)

1991/0713/sys/src/9/ss/trap.c:8,14 – 1991/0717/sys/src/9/ss/trap.c:8,14 (short | long | prev | next)
1990/1223		#include "errno.h" void notify(Ureg*); void noted(Ureg**);
1991/0717		void noted(Ureg**, ulong);
1990/1223		void rfnote(Ureg**);
1990/1226		extern void traplink(void);
1991/0713/sys/src/9/ss/trap.c:232,237 – 1991/0717/sys/src/9/ss/trap.c:232,238
1990/1223		if(!u->notified){ if(!u->notify) goto Die;
1991/0717		u->svpsr = ur->psr;
1990/1223		sp = ur->usp; sp -= sizeof(Ureg); u->ureg = (void*)sp;
1991/0713/sys/src/9/ss/trap.c:247,252 – 1991/0717/sys/src/9/ss/trap.c:248,254
1991/0112		ur->npc = (ulong)u->notify+4;
1990/1223		u->notified = 1; u->nnote--;
1991/0717		memmove(&u->lastnote, &u->note[0], sizeof(Note));
1991/0318		memmove(&u->note[0], &u->note[1], u->nnote*sizeof(Note));
1990/1223		} unlock(&u->p->debug);
1991/0713/sys/src/9/ss/trap.c:256,263 – 1991/0717/sys/src/9/ss/trap.c:258,274
1990/1223		* Return user to state before notify() */ void noted(Ureg **urp)
1991/0717		noted(Ureg **urp, ulong arg0)
1990/1223		{
1991/0717		Ureg *nur; nur = u->ureg; validaddr(nur->pc, 1, 0); validaddr(nur->usp, BY2WD, 0); if(nur->psr!=u->svpsr){ pprint("bad noted ureg psr %lux\n", nur->psr); pexit("Suicide", 0); }
1990/1223		lock(&u->p->debug); if(!u->notified){ unlock(&u->p->debug);
1991/0713/sys/src/9/ss/trap.c:266,274 – 1991/0717/sys/src/9/ss/trap.c:277,301
1990/1223		u->notified = 0;
1991/0318		memmove(*urp, u->ureg, sizeof(Ureg));
1991/0112		(*urp)->r7 = -1; /* return error from the interrupted call */
1990/1223		unlock(&u->p->debug); splhi(); rfnote(urp);
1991/0717		switch(arg0){ case NCONT: splhi(); unlock(&u->p->debug); rfnote(urp); break; /* never returns */ default: pprint("unknown noted arg 0x%lux\n", arg0); u->lastnote.flag = NDebug; /* fall through */ case NTERM: if(u->lastnote.flag == NDebug) pprint("suicide: %s\n", u->lastnote.msg); unlock(&u->p->debug); pexit(u->lastnote.msg, u->lastnote.flag!=NDebug); }
1990/1223		} #undef CHDIR /* BUG */
1991/0713/sys/src/9/ss/trap.c:376,382 – 1991/0717/sys/src/9/ss/trap.c:403,409
1991/0614		}
1990/1223		u->p->insyscall = 0;
1990/1226		if(r7 == NOTED) /* ugly hack */
1990/1223		noted(&aur); /* doesn't return */
1991/0717		noted(&aur, *(ulong*)(sp+1*BY2WD)); /* doesn't return */
1990/1223		if(u->nnote){
1990/1226		ur->r7 = ret;
1990/1223		notify(ur);