1993/0915/pc/trap.c (diff list | history)

1993/0225/sys/src/9/pc/trap.c:98,109 – 1993/0915/sys/src/9/pc/trap.c:98,109 (short | long | prev | next)
1991/1112		{ char buf[ERRLEN]; if(u == 0)
1993/0915		if(up == 0)
1991/1112		panic("kernel bpt"); /* restore pc to instruction that caused the trap */ ur->pc--;
1991/1218		sprint(buf, "sys: breakpoint");
1991/1112		postnote(u->p, 1, buf, NDebug);
1993/0915		postnote(up->p, 1, buf, NDebug);
1991/1112		}
1991/0614		/*
1993/0225/sys/src/9/pc/trap.c:218,223 – 1993/0915/sys/src/9/pc/trap.c:218,226
1991/1113		[13] "general protection violation", };
1993/0915		Ureg lasttrap, *lastur;
1991/0614		/*
1991/0703		* All traps
1991/0614		*/
1993/0225/sys/src/9/pc/trap.c:233,239 – 1993/0915/sys/src/9/pc/trap.c:236,242
1991/0731
1991/1112		user = ((ur->cs)&0xffff)!=KESEL && v!=Syscallvec; if(user) u->dbgreg = ur;
1993/0915		up->dbgreg = ur;
1991/1112
1991/0709		/* * tell the 8259 that we're done with the
1993/0225/sys/src/9/pc/trap.c:248,253 – 1993/0915/sys/src/9/pc/trap.c:251,258
1991/1113		}
1993/0217		if(v>=256 || (h = halloc.ivec[v]) == 0){
1993/0915		lasttrap = *ur; lastur = ur;
1993/0224		/* an old 386 generates these fairly often, no idea why */
1991/1214		if(v == 13) return;
1993/0225/sys/src/9/pc/trap.c:256,262 – 1993/0915/sys/src/9/pc/trap.c:261,267
1991/1113		if(v <= 16){ if(user){
1991/1218		sprint(buf, "sys: trap: %s", excname[v]);
1991/1113		postnote(u->p, 1, buf, NDebug);
1993/0915		postnote(up->p, 1, buf, NDebug);
1991/1113		return; } else { dumpregs(ur);
1993/0225/sys/src/9/pc/trap.c:267,273 – 1993/0915/sys/src/9/pc/trap.c:272,278
1993/0224		if(v >= Int0vec || v < Int0vec+16){ /* an unknown interrupts */ v -= Int0vec; if(badintr[v]++ == 0 || (badintr[v]%1000) == 0)
1993/0915		if(badintr[v]++ == 0 || (badintr[v]%100000) == 0)
1993/0224		print("unknown interrupt %d pc=0x%lux: total %d\n", v, ur->pc, badintr[v]); } else {
1993/0225/sys/src/9/pc/trap.c:284,291 – 1993/0915/sys/src/9/pc/trap.c:289,299
1993/0217		} while(h);
1991/0910
1993/0224		/* check user since syscall does its own notifying */
1992/0104		if(user && (u->p->procctl || u->nnote))
1993/0915		splhi(); if(user && (up->procctl || up->nnote))
1991/0910		notify(ur);
1993/0915		lasttrap = *ur; lastur = ur;
1991/0806		} /*
1993/0225/sys/src/9/pc/trap.c:292,304 – 1993/0915/sys/src/9/pc/trap.c:300,312
1991/0718		* dump registers */ void dumpregs(Ureg *ur)
1993/0915		dumpregs2(Ureg *ur)
1991/0718		{ if(u) print("registers for %s %d\n", u->p->text, u->p->pid);
1993/0915		if(up) print("registers for %s %d\n", up->text, up->pid);
1991/0718		else print("registers for kernel\n");
1991/1214		print("FLAGS=%lux ECODE=%lux CS=%lux PC=%lux", ur->flags,
1993/0915		print("FLAGS=%lux TRAP=%lux ECODE=%lux CS=%lux PC=%lux", ur->flags, ur->trap,
1991/1214		ur->ecode, ur->cs&0xff, ur->pc); if(ur == (Ureg*)UREGADDR) print(" SS=%lux USP=%lux\n", ur->ss&0xff, ur->usp);
1993/0225/sys/src/9/pc/trap.c:310,328 – 1993/0915/sys/src/9/pc/trap.c:318,346
1991/1214		ur->si, ur->di, ur->bp); print(" DS %4.4ux ES %4.4ux FS %4.4ux GS %4.4ux\n", ur->ds&0xffff, ur->es&0xffff, ur->fs&0xffff, ur->gs&0xffff);
1993/0915
1991/0718		}
1991/0720		void
1993/0915		dumpregs(Ureg *ur) { dumpregs2(ur); print(" ur %lux\n", ur); dumpregs2(&lasttrap); print(" lastur %lux\n", lastur); } void
1991/0720		dumpstack(void) {
1992/0804		ulong l, v, i; extern ulong etext; if(u == 0)
1993/0915		if(up == 0)
1992/0804		return; i = 0; for(l=(ulong)&l; l<USERADDR+BY2PG; l+=4){
1993/0915		for(l=(ulong)&l; l<up->kstack+BY2PG; l+=4){
1992/0804		v = *(ulong*)l; if(KTZERO < v && v < (ulong)&etext){ print("%lux ", v);
1993/0225/sys/src/9/pc/trap.c:369,399 – 1993/0915/sys/src/9/pc/trap.c:387,417
1991/0720		long ret; int i;
1991/0718		u->p->insyscall = 1; u->p->pc = ur->pc;
1993/0915		up->insyscall = 1; up->pc = ur->pc;
1991/0720		if((ur->cs)&0xffff == KESEL) panic("recursive system call");
1991/0718
1992/06271		u->scallnr = ur->ax;
1992/0805		if(u->scallnr == RFORK && u->p->fpstate == FPactive){
1993/0915		up->scallnr = ur->ax; if(up->scallnr == RFORK && up->fpstate == FPactive){
1992/0805		/* * so that the child starts out with the * same registers as the parent */ splhi(); if(u->p->fpstate == FPactive){ fpsave(&u->fpsave); u->p->fpstate = FPinactive;
1993/0915		if(up->fpstate == FPactive){ fpsave(&up->fpsave); up->fpstate = FPinactive;
1992/0805		} spllo(); }
1991/0720		sp = ur->usp; u->nerrlab = 0;
1993/0915		up->nerrlab = 0;
1991/0720		ret = -1; if(!waserror()){
1992/06271		if(u->scallnr >= sizeof systab/BY2WD){ pprint("bad sys call number %d pc %lux\n", u->scallnr, ur->pc);
1991/0720		postnote(u->p, 1, "sys: bad sys call", NDebug);
1993/0915		if(up->scallnr >= sizeof systab/BY2WD){ pprint("bad sys call number %d pc %lux\n", up->scallnr, ur->pc); postnote(up->p, 1, "sys: bad sys call", NDebug);
1991/0720		error(Ebadarg); }
1992/0625
1993/0225/sys/src/9/pc/trap.c:400,420 – 1993/0915/sys/src/9/pc/trap.c:418,438
1991/0720		if(sp<(USTKTOP-BY2PG) || sp>(USTKTOP-(1+MAXSYSARG)*BY2WD)) validaddr(sp, (1+MAXSYSARG)*BY2WD, 0);
1992/0625		u->s = *((Sargs*)(sp+1*BY2WD));
1992/06271		u->p->psstate = sysctab[u->scallnr];
1993/0915		up->s = *((Sargs*)(sp+1*BY2WD)); up->psstate = sysctab[up->scallnr];
1992/0625
1992/06271		ret = (*systab[u->scallnr])(u->s.args);
1993/0915		ret = (*systab[up->scallnr])(up->s.args);
1991/0720		poperror(); } if(u->nerrlab){
1992/06271		print("bad errstack [%d]: %d extra\n", u->scallnr, u->nerrlab);
1993/0915		if(up->nerrlab){ print("bad errstack [%d]: %d extra\n", up->scallnr, up->nerrlab);
1991/0720		for(i = 0; i < NERR; i++) print("sp=%lux pc=%lux\n", u->errlab[i].sp, u->errlab[i].pc);
1993/0915		print("sp=%lux pc=%lux\n", up->errlab[i].sp, up->errlab[i].pc);
1991/0720		panic("error stack"); }
1991/1114
1991/0720		u->p->insyscall = 0;
1991/0926		u->p->psstate = 0;
1993/0915		up->insyscall = 0; up->psstate = 0;
1992/0609		/* * Put return value in frame. On the safari the syscall is
1993/0225/sys/src/9/pc/trap.c:424,434 – 1993/0915/sys/src/9/pc/trap.c:442,452
1992/0609		*/
1991/0801		ur->ax = ret;
1992/0609
1992/06271		if(u->scallnr == NOTED)
1993/0915		if(up->scallnr == NOTED)
1991/0720		noted(ur, *(ulong*)(sp+BY2WD));
1991/1114
1992/0103		splhi(); /* avoid interrupts during the iret */
1992/06271		if(u->scallnr!=RFORK && (u->p->procctl || u->nnote))
1993/0915		if(up->scallnr!=RFORK && (up->procctl || up->nnote))
1991/0720		notify(ur);
1992/0804
1991/0720		return ret;
1993/0225/sys/src/9/pc/trap.c:445,459 – 1993/0915/sys/src/9/pc/trap.c:463,477
1991/1114		ulong s, sp;
1991/1218		Note *n;
1991/0720
1991/1112		if(u->p->procctl) procctl(u->p);
1992/0108		if(u->nnote == 0)
1993/0915		if(up->procctl) procctl(up->p); if(up->nnote == 0)
1992/0108		return 0;
1991/1114		s = spllo();
1991/1216		qlock(&u->p->debug);
1991/0727		u->p->notepending = 0;
1991/1218		n = &u->note[0];
1993/0915		qlock(&up->debug); up->notepending = 0; n = &up->note[0];
1991/1218		if(strncmp(n->msg, "sys:", 4) == 0){ l = strlen(n->msg); if(l > ERRLEN-15) /* " pc=0x12345678\0" */
1993/0225/sys/src/9/pc/trap.c:460,505 – 1993/0915/sys/src/9/pc/trap.c:478,523
1991/1218		l = ERRLEN-15; sprint(n->msg+l, " pc=0x%.8lux", ur->pc); } if(n->flag!=NUser && (u->notified || u->notify==0)){
1993/0915		if(n->flag!=NUser && (up->notified || up->notify==0)){ qunlock(&up->debug);
1992/0714		if(n->flag == NDebug)
1991/1218		pprint("suicide: %s\n", n->msg);
1991/1216		qunlock(&u->p->debug);
1991/1218		pexit(n->msg, n->flag!=NDebug);
1991/0720		}
1992/0124		sent = 0;
1991/0720		if(!u->notified){
1992/1203		if(!u->notify){ qunlock(&u->p->debug);
1993/0915		if(!up->notified){ if(!up->notify){ qunlock(&up->debug);
1992/1203		pexit(n->msg, n->flag!=NDebug); }
1992/0124		sent = 1;
1991/0720		u->svcs = ur->cs; u->svss = ur->ss; u->svflags = ur->flags;
1993/0915		up->svcs = ur->cs; up->svss = ur->ss; up->svflags = ur->flags;
1991/0720		sp = ur->usp; sp -= sizeof(Ureg);
1992/0616		if(!okaddr((ulong)u->notify, 1, 0)
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");
1991/1216		qunlock(&u->p->debug);
1991/0722		pexit("Suicide", 0); }
1991/0720		u->ureg = (void*)sp;
1993/0915		up->ureg = (void*)sp;
1991/0720		memmove((Ureg*)sp, ur, sizeof(Ureg)); sp -= ERRLEN; memmove((char*)sp, u->note[0].msg, 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 */ *(ulong*)(sp+1*BY2WD) = (ulong)u->ureg; /* arg 1 is ureg* */
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; ur->pc = (ulong)u->notify; u->notified = 1; u->nnote--; memmove(&u->lastnote, &u->note[0], sizeof(Note)); memmove(&u->note[0], &u->note[1], u->nnote*sizeof(Note));
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));
1991/0720		}
1991/1216		qunlock(&u->p->debug);
1993/0915		qunlock(&up->debug);
1991/1114		splx(s);
1992/0124		return sent;
1991/0710		}
1993/0225/sys/src/9/pc/trap.c:512,554 – 1993/0915/sys/src/9/pc/trap.c:530,572
1991/0710		{
1991/0720		Ureg *nur;
1992/0609		nur = u->ureg; /* pointer to user returned Ureg struct */
1991/0720		if(nur->cs!=u->svcs || nur->ss!=u->svss
1991/0802		|| (nur->flags&0xff00)!=(u->svflags&0xff00)){
1993/0915		nur = up->ureg; /* pointer to user returned Ureg struct */ if(nur->cs!=up->svcs || nur->ss!=up->svss || (nur->flags&0xff00)!=(up->svflags&0xff00)){
1991/0720		pprint("bad noted ureg cs %ux ss %ux flags %ux\n", nur->cs, nur->ss, nur->flags);
1991/0814		Die:
1991/0720		pexit("Suicide", 0); }
1991/1216		qlock(&u->p->debug);
1991/0720		if(!u->notified){
1993/0915		qlock(&up->debug); if(!up->notified){
1991/0814		pprint("call to noted() when not notified\n");
1991/1216		qunlock(&u->p->debug);
1993/0915		qunlock(&up->debug);
1991/0720		return; } u->notified = 0;
1992/0609		nur->flags = (u->svflags&0xffffff00) | (nur->flags&0xff);
1993/0915		up->notified = 0; nur->flags = (up->svflags&0xffffff00) | (nur->flags&0xff);
1992/0609		memmove(ur, nur, sizeof(Ureg));
1991/0720		switch(arg0){ case NCONT:
1992/0616		if(!okaddr(nur->pc, 1, 0) || !okaddr(nur->usp, BY2WD, 0)){
1991/0814		pprint("suicide: trap in noted\n");
1991/1216		qunlock(&u->p->debug);
1993/0915		qunlock(&up->debug);
1991/0814		goto Die; }
1991/1216		qunlock(&u->p->debug);
1993/0915		qunlock(&up->debug);
1991/0722		return;
1991/0720		default: pprint("unknown noted arg 0x%lux\n", arg0); u->lastnote.flag = NDebug;
1993/0915		up->lastnote.flag = NDebug;
1991/0720		/* fall through */ case NDFLT: if(u->lastnote.flag == NDebug) pprint("suicide: %s\n", u->lastnote.msg);
1991/1216		qunlock(&u->p->debug);
1991/0720		pexit(u->lastnote.msg, u->lastnote.flag!=NDebug);
1993/0915		if(up->lastnote.flag == NDebug) pprint("suicide: %s\n", up->lastnote.msg); qunlock(&up->debug); pexit(up->lastnote.msg, up->lastnote.flag!=NDebug);
1991/0720		}
1991/1112		}