1993/1113/pc/trap.c (diff list | history)

1993/1022/sys/src/9/pc/trap.c:219,224 – 1993/1113/sys/src/9/pc/trap.c:219,225 (short | long | prev | next)
1991/1113		};
1993/0915		Ureg lasttrap, *lastur;
1993/1113		Proc *lastup;
1993/0915
1991/0614		/*
1993/1022/sys/src/9/pc/trap.c:234,243 – 1993/1113/sys/src/9/pc/trap.c:235,251
1991/0703
1991/0731		v = ur->trap;
1991/1112		user = ((ur->cs)&0xffff)!=KESEL && v!=Syscallvec;
1993/1113		user = (ur->cs&0xffff) == UESEL;
1991/1112		if(user)
1993/0915		up->dbgreg = ur;
1991/1112
1993/1113		ur->cs &= 0xffff; ur->ds &= 0xffff; ur->es &= 0xffff; ur->fs &= 0xffff; ur->gs &= 0xffff; if(user) ur->ss &= 0xffff;
1991/0709		/* * tell the 8259 that we're done with the
1991/0801		* highest level interrupt (interrupts are still
1993/1022/sys/src/9/pc/trap.c:253,258 – 1993/1113/sys/src/9/pc/trap.c:261,267
1993/0217		if(v>=256 || (h = halloc.ivec[v]) == 0){
1993/0915		lasttrap = *ur; lastur = ur;
1993/1113		lastup = up;
1993/0224		/* an old 386 generates these fairly often, no idea why */
1991/1214		if(v == 13) return;
1993/1022/sys/src/9/pc/trap.c:292,297 – 1993/1113/sys/src/9/pc/trap.c:301,308
1993/0915		splhi(); if(user && (up->procctl || up->nnote))
1991/0910		notify(ur);
1993/1113		lastup = up;
1993/0915		lasttrap = *ur; lastur = ur;
1991/0806		}
1993/1022/sys/src/9/pc/trap.c:307,320 – 1993/1113/sys/src/9/pc/trap.c:318,331
1991/0718		else print("registers for kernel\n");
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);
1993/1013		print(" SS=%lux USP=%lux\n", ur->ss&0xff, ur->usp);
1993/1113		ur->ecode, ur->cs, ur->pc); print(" SS=%lux USP=%lux\n", ur->ss, ur->usp);
1991/0718		print(" AX %8.8lux BX %8.8lux CX %8.8lux DX %8.8lux\n", ur->ax, ur->bx, ur->cx, ur->dx);
1991/1214		print(" SI %8.8lux DI %8.8lux BP %8.8lux\n", 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);
1993/1113		print(" DS %4.4lux ES %4.4lux FS %4.4lux GS %4.4lux\n", ur->ds, ur->es, ur->fs, ur->gs);
1993/0915
1991/0718		}
1993/1022/sys/src/9/pc/trap.c:321,330 – 1993/1113/sys/src/9/pc/trap.c:332,348
1991/0720		void
1993/0915		dumpregs(Ureg *ur) {
1993/1113		ulong *x; x = (ulong*)(ur+1);
1993/0915		dumpregs2(ur); print(" ur %lux\n", ur);
1993/1113		print(" magic %lux %lux %lux\n", x[0], x[1], x[2]); print(" ur %lux up %lux\n", ur, up);
1993/0915		dumpregs2(&lasttrap); print(" lastur %lux\n", lastur);
1993/1113		print(" lastur %lux lastup %lux\n", lastur); splhi(); dumpstack(); for(;;);
1993/0915		} void
1993/1022/sys/src/9/pc/trap.c:332,380 – 1993/1113/sys/src/9/pc/trap.c:350,377
1991/0720		{
1992/0804		ulong l, v, i; extern ulong etext;
1993/1113		int lim;
1992/0804
1993/0915		if(up == 0)
1992/0804		return; i = 0;
1993/1013		for(l=(ulong)&l; l<(ulong)(up->kstack+BY2PG); l+=4){
1993/1113		lim = 3; for(l=(ulong)&l; l<(ulong)(up->kstack+BY2PG) && lim; l+=4){
1992/0804		v = *(ulong*)l; if(KTZERO < v && v < (ulong)&etext){ print("%lux ", v); i++; } if(i == 4){
1993/1113		if(i == 8){
1992/0804		i = 0; print("\n");
1993/1113		lim--;
1992/0804		} }
1991/0720		}
1991/1214		long execregs(ulong entry, ulong ssize, ulong nargs)
1991/0720		{
1991/1214		ulong *sp;
1993/1013		Ureg *ur;
1991/1214		sp = (ulong*)(USTKTOP - ssize); *--sp = nargs;
1993/1013		ur = up->dbgreg; ur->usp = (ulong)sp; ur->pc = entry;
1991/1214		return USTKTOP-BY2WD; /* address of user-level clock */
1991/0720		}
1992/0120		ulong userpc(void) {
1993/1013		Ureg *ur;                  ur = (Ureg*)up->dbgreg; return ur->pc;
1992/0120		}
1991/0718		/*
1991/0710		* system calls */
1993/1022/sys/src/9/pc/trap.c:573,578 – 1993/1113/sys/src/9/pc/trap.c:570,599
1991/0720		}
1991/1112		}
1993/1113		long execregs(ulong entry, ulong ssize, ulong nargs) { ulong *sp; Ureg *ur; sp = (ulong*)(USTKTOP - ssize); *--sp = nargs; ur = up->dbgreg; ur->usp = (ulong)sp; ur->pc = entry; return USTKTOP-BY2WD; /* address of user-level clock */ } ulong userpc(void) { Ureg *ur; ur = (Ureg*)up->dbgreg; return ur->pc; }
1991/1112		/* This routine must save the values of registers the user is not permitted to write * from devproc and the restore the saved values before returning */
1993/1022/sys/src/9/pc/trap.c:590,595 – 1993/1113/sys/src/9/pc/trap.c:611,655
1991/1112		xp->flags = (xp->flags & 0xff) | (flags & 0xff00); xp->cs = cs; xp->ss = ss;
1993/1113		} static void linkproc(void) { spllo(); (*up->kpfun)(up->kparg); } void kprocchild(Proc *p, void (*func)(void*), void *arg) { p->sched.pc = (ulong)linkproc; p->sched.sp = (ulong)p->kstack+KSTACK; p->kpfun = func; p->kparg = arg; } void forkchild(Proc *p, Ureg *ur) { Ureg *cur; /* * We add 2*BY2Wd to the stack because we have to account for * - the return PC * - trap's argument (ur) */ p->sched.sp = (ulong)p->kstack+KSTACK-(sizeof(Ureg)+2*BY2WD); p->sched.pc = (ulong)forkret; cur = (Ureg*)(p->sched.sp+2*BY2WD); memmove(cur, ur, sizeof(Ureg)); cur->ax = 0; /* return value of syscall in child */ /* Things from bottom of syscall we never got to execute */ p->psstate = 0; p->insyscall = 0;
1991/0614		}
1993/1022		/* Give enough context in the ureg to produce a kernel stack for