1993/0224/pc/trap.c (diff list | history)

1993/0220/sys/src/9/pc/trap.c:43,49 – 1993/0224/sys/src/9/pc/trap.c:43,49 (short | long | prev | next)
1991/0614		* trap/interrupt gates
1991/0613		*/
1991/0703		Segdesc ilt[256];
1993/0220		int badtrap[256];
1993/0224		int badintr[16];
1991/0703
1993/0217		typedef struct Handler Handler; struct Handler
1993/0220/sys/src/9/pc/trap.c:245,257 – 1993/0224/sys/src/9/pc/trap.c:245,258
1991/0731		if(c == Int1vec) outb(Int1ctl, EOI);
1993/0219		outb(Int0ctl, EOI);
1991/0823		if(v != Uart0vec) uartintr0(ur);
1991/1113		}
1993/0217		if(v>=256 || (h = halloc.ivec[v]) == 0){
1993/0224		/* an old 386 generates these fairly often, no idea why */
1991/1214		if(v == 13) return;
1993/0224		/* a processor or coprocessor error */
1991/1113		if(v <= 16){ if(user){
1991/1218		sprint(buf, "sys: trap: %s", excname[v]);
1993/0220/sys/src/9/pc/trap.c:262,281 – 1993/0224/sys/src/9/pc/trap.c:263,289
1991/1113		panic("%s pc=0x%lux", excname[v], ur->pc); } }
1993/0220		if(badtrap[v]++ < 10 || (badtrap[v]%1000) == 0) print("bad trap type %d pc=0x%lux: total %d\n", v, ur->pc, badtrap[v]);
1993/0224		if(v >= Int0vec || v < Int0vec+16){ /* an unknown interrupts */ v -= Int0vec; if(badintr[v]++ == 0 || (badintr[v]%1000) == 0) print("unknown interrupt %d pc=0x%lux: total %d\n", v, ur->pc, badintr[v]); } else { /* unimplemented traps */ print("illegal trap %d pc=0x%lux\n", v, ur->pc); }
1992/0918		return;
1991/0731		}
1991/0801
1993/0224		/* there may be multiple handlers on one interrupt level */
1993/0217		do { (*h->r)(ur); h = h->next; } while(h);
1991/0910
1991/0913		/*
1992/0108		* check user since syscall does its own notifying
1991/0913		*/
1993/0224		/* check user since syscall does its own notifying */
1992/0104		if(user && (u->p->procctl || u->nnote))
1991/0910		notify(ur);
1991/0806		}