1995/0202/pc/trap.c (diff list | history)

1995/0115/sys/src/9/pc/trap.c:482,488 – 1995/0202/sys/src/9/pc/trap.c:482,488 (short | long | prev | next)
1992/0108		int
1991/0720		notify(Ureg *ur)
1991/0710		{
1992/0124		int l, sent;
1995/0202		int l;
1991/1114		ulong s, sp;
1991/1218		Note *n;
1991/0720
1995/0115/sys/src/9/pc/trap.c:501,506 – 1995/0202/sys/src/9/pc/trap.c:501,507
1991/1218		l = ERRLEN-15; sprint(n->msg+l, " pc=0x%.8lux", ur->pc); }
1995/0202
1993/0915		if(n->flag!=NUser && (up->notified || up->notify==0)){ qunlock(&up->debug);
1992/0714		if(n->flag == NDebug)
1995/0115/sys/src/9/pc/trap.c:507,548 – 1995/0202/sys/src/9/pc/trap.c:508,554
1991/1218		pprint("suicide: %s\n", n->msg); pexit(n->msg, n->flag!=NDebug);
1991/0720		}
1992/0124		sent = 0;
1993/0915		if(!up->notified){ if(!up->notify){ qunlock(&up->debug);
1992/1203		pexit(n->msg, n->flag!=NDebug); }
1992/0124		sent = 1;
1993/0915		up->svcs = ur->cs; up->svss = ur->ss; up->svflags = ur->flags;
1991/0720		sp = ur->usp; sp -= sizeof(Ureg);
1993/0915		if(!okaddr((ulong)up->notify, 1, 0)
1992/0616		|| !okaddr(sp-ERRLEN-3*BY2WD, sizeof(Ureg)+ERRLEN-3*BY2WD, 0)){
1993/0915		qunlock(&up->debug);
1992/0616		pprint("suicide: bad address in notify\n");
1991/0722		pexit("Suicide", 0); }
1993/0915		up->ureg = (void*)sp;
1991/0720		memmove((Ureg*)sp, ur, sizeof(Ureg)); sp -= ERRLEN;
1993/0915		memmove((char*)sp, up->note[0].msg, ERRLEN);
1991/0720		sp -= 3*BY2WD; *(ulong*)(sp+2*BY2WD) = sp+3*BY2WD; /* arg 2 is string */
1993/0915		*(ulong*)(sp+1*BY2WD) = (ulong)up->ureg; /* arg 1 is ureg* */
1991/0720		*(ulong*)(sp+0*BY2WD) = 0; /* arg 0 is pc */ ur->usp = sp;
1993/0915		ur->pc = (ulong)up->notify; up->notified = 1; up->nnote--; memmove(&up->lastnote, &up->note[0], sizeof(Note)); memmove(&up->note[0], &up->note[1], up->nnote*sizeof(Note));
1995/0202		if(up->notified) { qunlock(&up->debug); splhi(); return 0;
1991/0720		}
1995/0202		if(!up->notify){ qunlock(&up->debug); pexit(n->msg, n->flag!=NDebug); } sp = ur->usp; sp -= sizeof(Ureg); if(!okaddr((ulong)up->notify, 1, 0) || !okaddr(sp-ERRLEN-3*BY2WD, sizeof(Ureg)+ERRLEN-3*BY2WD, 0)){ pprint("suicide: bad address in notify\n"); qunlock(&up->debug); pexit("Suicide", 0); } up->ureg = (void*)sp; memmove((Ureg*)sp, ur, sizeof(Ureg)); *(Ureg**)(sp-BY2WD) = up->ureg; /* word under Ureg is old up->ureg */ up->ureg = (void*)sp; sp -= BY2WD+ERRLEN; memmove((char*)sp, up->note[0].msg, ERRLEN); sp -= 3*BY2WD; *(ulong*)(sp+2*BY2WD) = sp+3*BY2WD; /* arg 2 is string */ *(ulong*)(sp+1*BY2WD) = (ulong)up->ureg; /* arg 1 is ureg* */ *(ulong*)(sp+0*BY2WD) = 0; /* arg 0 is pc */ ur->usp = sp; ur->pc = (ulong)up->notify; up->notified = 1; up->nnote--; memmove(&up->lastnote, &up->note[0], sizeof(Note)); memmove(&up->note[0], &up->note[1], up->nnote*sizeof(Note));
1993/0915		qunlock(&up->debug);
1991/1114		splx(s);
1992/0124		return sent;
1995/0202		return 1;
1991/0710		}
1991/0720		/*
1995/0115/sys/src/9/pc/trap.c:552,560 – 1995/0202/sys/src/9/pc/trap.c:558,567
1991/0720		noted(Ureg *ur, ulong arg0)
1991/0710		{
1991/0720		Ureg *nur;
1995/0202		ulong oureg, sp;
1991/0720
1993/0915		qlock(&up->debug);
1994/0513		if(!up->notified) {
1995/0202		if(arg0!=NRSTR && !up->notified) {
1993/0915		qunlock(&up->debug);
1994/0513		pprint("call to noted() when not notified\n");
1995/0105		pexit("Suicide", 0);
1995/0115/sys/src/9/pc/trap.c:562,587 – 1995/0202/sys/src/9/pc/trap.c:569,619
1993/0915		up->notified = 0;
1994/0513		nur = up->ureg; /* pointer to user returned Ureg struct */ if(nur->cs!=up->svcs || nur->ss!=up->svss || (nur->flags&0xff00)!=(up->svflags&0xff00)) {
1995/0202		/* sanity clause */ oureg = (ulong)nur; if(oureg>=USTKTOP || oureg<USTKTOP-USTKSIZE || !okaddr((ulong)oureg-BY2WD, BY2WD+sizeof(Ureg), 0)){ pprint("bad ureg in noted or call to noted() when not notified\n");
1994/0513		qunlock(&up->debug); pprint("bad noted ureg cs %ux ss %ux flags %ux\n", nur->cs, nur->ss, nur->flags); pexit("Suicide", 0);
1995/0202		pexit("Suicide", 0);
1994/0513		}
1993/0915		nur->flags = (up->svflags&0xffffff00) | (nur->flags&0xff);
1995/0202		/* don't let user change text or stack segments */ nur->cs = ur->cs; nur->ss = ur->ss; /* don't let user change system flags */ nur->flags = (ur->flags & ~0xCD5) | (nur->flags & 0xCD5);
1992/0609		memmove(ur, nur, sizeof(Ureg));
1995/0105		qunlock(&up->debug);
1991/0720		switch(arg0){ case NCONT:
1995/0202		case NRSTR:
1992/0616		if(!okaddr(nur->pc, 1, 0) || !okaddr(nur->usp, BY2WD, 0)){
1991/0814		pprint("suicide: trap in noted\n");
1995/0202		qunlock(&up->debug);
1994/0513		pexit("Suicide", 0);
1991/0814		}
1995/0202		up->ureg = (Ureg*)(*(ulong*)(oureg-BY2WD)); qunlock(&up->debug);
1995/0105		break;
1991/0720
1995/0202		case NSAVE: if(!okaddr(nur->pc, BY2WD, 0) || !okaddr(nur->usp, BY2WD, 0)){ pprint("suicide: trap in noted\n"); qunlock(&up->debug); pexit("Suicide", 0); } qunlock(&up->debug); sp = oureg-4*BY2WD-ERRLEN; splhi(); ur->sp = sp; ((ulong*)sp)[1] = oureg; /* arg 1 0(FP) is ureg* */ ((ulong*)sp)[0] = 0; /* arg 0 is pc */ break;
1991/0720		default: pprint("unknown noted arg 0x%lux\n", arg0);
1993/0915		up->lastnote.flag = NDebug;
1995/0115/sys/src/9/pc/trap.c:590,595 – 1995/0202/sys/src/9/pc/trap.c:622,628
1991/0720		case NDFLT:
1993/0915		if(up->lastnote.flag == NDebug) pprint("suicide: %s\n", up->lastnote.msg);
1995/0202		qunlock(&up->debug);
1993/0915		pexit(up->lastnote.msg, up->lastnote.flag!=NDebug);
1991/0720		}
1991/1112		}