1993/1124/pc/trap.c (diff list | history)

1993/1116/sys/src/9/pc/trap.c:48,54 – 1993/1124/sys/src/9/pc/trap.c:48,55 (short | long | prev | next)
1993/0217		typedef struct Handler Handler; struct Handler { void (*r)(void*);
1993/1124		void (*r)(Ureg*, void*); void *arg;
1993/0217		Handler *next; };
1993/1116/sys/src/9/pc/trap.c:68,74 – 1993/1124/sys/src/9/pc/trap.c:69,75
1991/0703		}
1991/0614
1991/0703		void
1991/0716		setvec(int v, void (*r)(Ureg*))
1993/1124		setvec(int v, void (*r)(Ureg*, void*), void *arg)
1991/0703		{
1993/0217		Handler *h;
1991/0709
1993/1116/sys/src/9/pc/trap.c:78,83 – 1993/1124/sys/src/9/pc/trap.c:79,85
1993/0217		h = &halloc.h[halloc.free++]; h->next = halloc.ivec[v]; h->r = r;
1993/1124		h->arg = arg;
1993/0217		halloc.ivec[v] = h; unlock(&halloc);
1993/1116/sys/src/9/pc/trap.c:94,103 – 1993/1124/sys/src/9/pc/trap.c:96,107
1991/0703		}
1991/1112		void debugbpt(Ureg *ur)
1993/1124		debugbpt(Ureg *ur, void *arg)
1991/1112		{ char buf[ERRLEN];
1993/1124		USED(arg);
1993/0915		if(up == 0)
1991/1112		panic("kernel bpt"); /* restore pc to instruction that caused the trap */
1993/1116/sys/src/9/pc/trap.c:164,172 – 1993/1124/sys/src/9/pc/trap.c:168,176
1991/1214		* system calls and break points
1991/0710		*/
1993/1114		sethvec(Syscallvec, intr64, SEGIG, 3);
1991/0910		setvec(Syscallvec, (void (*)(Ureg*))syscall);
1993/1124		setvec(Syscallvec, syscall, 0);
1993/1114		sethvec(Bptvec, intr3, SEGIG, 3);
1991/1112		setvec(Bptvec, debugbpt);
1993/1124		setvec(Bptvec, debugbpt, 0);
1991/0710		/*
1991/0703		* tell the hardware where the table is (and how long)
1993/1116/sys/src/9/pc/trap.c:223,229 – 1993/1124/sys/src/9/pc/trap.c:227,233
1993/0915
1991/0614		/*
1993/1115		* All trapscome here. It is slower to have all traps call trap() rather than
1993/1124		* All traps come here. It is slower to have all traps call trap() rather than
1993/1115		* directly vectoring the handler. However, this avoids a lot of code duplication * and possible bugs.
1991/0614		*/
1993/1116/sys/src/9/pc/trap.c:295,301 – 1993/1124/sys/src/9/pc/trap.c:299,305
1991/0801
1993/0224		/* there may be multiple handlers on one interrupt level */
1993/0217		do { (*h->r)(ur);
1993/1124		(*h->r)(ur, h->arg);
1993/0217		h = h->next; } while(h);
1991/0910
1993/1116/sys/src/9/pc/trap.c:387,399 – 1993/1124/sys/src/9/pc/trap.c:391,405
1992/0103		/* * syscall is called spllo() */
1991/0710		long syscall(Ureg *ur)
1993/1124		void syscall(Ureg *ur, void *arg)
1991/0710		{
1991/0720		ulong sp; long ret; int i;
1993/1124		USED(arg);
1993/0915		up->insyscall = 1; up->pc = ur->pc;
1991/0720		if((ur->cs)&0xffff == KESEL)
1993/1116/sys/src/9/pc/trap.c:455,462 – 1993/1124/sys/src/9/pc/trap.c:461,466
1992/0103		splhi(); /* avoid interrupts during the iret */
1993/0915		if(up->scallnr!=RFORK && (up->procctl || up->nnote))
1991/0720		notify(ur);
1992/0804
1991/0720		return ret;
1991/0710		}
1991/0720		/*