Ejemplos de fpunoted en C++ (Cpp)

Ejemplo n.º 1

Archivo: syscall.c Proyecto: 99years/plan9

/*
 *   Return user to state before notify()
 */
void
noted(Ureg* cur, uintptr arg0)
{
	NFrame *nf;
	Note note;
	Ureg *nur;

	qlock(&up->debug);
	if(arg0 != NRSTR && !up->notified){
		qunlock(&up->debug);
		pprint("suicide: call to noted when not notified\n");
		pexit("Suicide", 0);
	}
	up->notified = 0;
	fpunoted();

	nf = up->ureg;

	/* sanity clause */
	if(!okaddr(PTR2UINT(nf), sizeof(NFrame), 0)){
		qunlock(&up->debug);
		pprint("suicide: bad ureg %#p in noted\n", nf);
		pexit("Suicide", 0);
	}

	/*
	 * Check the segment selectors are all valid.
	 */
	nur = &nf->ureg;
	if(nur->cs != SSEL(SiUCS, SsRPL3) || nur->ss != SSEL(SiUDS, SsRPL3)
	|| nur->ds != SSEL(SiUDS, SsRPL3) || nur->es != SSEL(SiUDS, SsRPL3)
	|| nur->fs != SSEL(SiUDS, SsRPL3) || nur->gs != SSEL(SiUDS, SsRPL3)){
		qunlock(&up->debug);
		pprint("suicide: bad segment selector in noted\n");
		pexit("Suicide", 0);
	}

	/* don't let user change system flags */
	nur->flags &= (Of|Df|Sf|Zf|Af|Pf|Cf);
	nur->flags |= cur->flags & ~(Of|Df|Sf|Zf|Af|Pf|Cf);

	memmove(cur, nur, sizeof(Ureg));

	switch((int)arg0){
	case NCONT:
	case NRSTR:
		if(!okaddr(nur->ip, BY2SE, 0) || !okaddr(nur->sp, BY2SE, 0)){
			qunlock(&up->debug);
			pprint("suicide: trap in noted pc=%#p sp=%#p\n",
				nur->ip, nur->sp);
			pexit("Suicide", 0);
		}
		up->ureg = nf->old;
		qunlock(&up->debug);
		break;
	case NSAVE:
		if(!okaddr(nur->ip, BY2SE, 0) || !okaddr(nur->sp, BY2SE, 0)){
			qunlock(&up->debug);
			pprint("suicide: trap in noted pc=%#p sp=%#p\n",
				nur->ip, nur->sp);
			pexit("Suicide", 0);
		}
		qunlock(&up->debug);

		splhi();
		nf->arg1 = nf->msg;
		nf->arg0 = &nf->ureg;
		cur->bp = PTR2UINT(nf->arg0);
		nf->ip = 0;
		cur->sp = PTR2UINT(nf);
		break;
	default:
		memmove(&note, &up->lastnote, sizeof(Note));
		qunlock(&up->debug);
		pprint("suicide: bad arg %#p in noted: %s\n", arg0, note.msg);
		pexit(note.msg, 0);
		break;
	case NDFLT:
		memmove(&note, &up->lastnote, sizeof(Note));
		qunlock(&up->debug);
		if(note.flag == NDebug)
			pprint("suicide: %s\n", note.msg);
		pexit(note.msg, note.flag != NDebug);
		break;
	}
}

Ejemplo n.º 2

Archivo: syscall.c Proyecto: carriercomm/plan9-gpl

/*
 *   Return user to state before notify()
 */
static void
noted(Ureg* cur, uintptr arg0)
{
	NFrame *nf;
	Ureg *nur;

	qlock(&up->debug);
	if(arg0 != NRSTR && !up->notified){
		qunlock(&up->debug);
		pprint("call to noted() when not notified\n");
		pexit("Suicide", 0);
	}
	up->notified = 0;
	fpunoted();

	nf = up->ureg;

	/* sanity clause */
	if(!okaddr(PTR2UINT(nf), sizeof(NFrame), 0)){
		qunlock(&up->debug);
		pprint("bad ureg in noted %#p\n", nf);
		pexit("Suicide", 0);
	}

	/* don't let user change system flags */
	nur = &nf->ureg;
	nur->psr &= PsrMask|PsrDfiq|PsrDirq;
	nur->psr |= (cur->psr & ~(PsrMask|PsrDfiq|PsrDirq));

	memmove(cur, nur, sizeof(Ureg));

	switch((int)arg0){
	case NCONT:
	case NRSTR:
		if(!okaddr(nur->pc, BY2WD, 0) || !okaddr(nur->sp, BY2WD, 0)){
			qunlock(&up->debug);
			pprint("suicide: trap in noted\n");
			pexit("Suicide", 0);
		}
		up->ureg = nf->old;
		qunlock(&up->debug);
		break;
	case NSAVE:
		if(!okaddr(nur->pc, BY2WD, 0) || !okaddr(nur->sp, BY2WD, 0)){
			qunlock(&up->debug);
			pprint("suicide: trap in noted\n");
			pexit("Suicide", 0);
		}
		qunlock(&up->debug);

		splhi();
		nf->arg1 = nf->msg;
		nf->arg0 = &nf->ureg;
		nf->ip = 0;
		cur->sp = PTR2UINT(nf);
		cur->r0 = PTR2UINT(nf->arg0);
		break;
	default:
		pprint("unknown noted arg %#p\n", arg0);
		up->lastnote.flag = NDebug;
		/*FALLTHROUGH*/
	case NDFLT:
		if(up->lastnote.flag == NDebug){ 
			qunlock(&up->debug);
			pprint("suicide: %s\n", up->lastnote.msg);
		}
		else
			qunlock(&up->debug);
		pexit(up->lastnote.msg, up->lastnote.flag != NDebug);
	}
}