1991/0614/ss/trap.c (diff list | history)

1991/0604/sys/src/9/ss/trap.c:309,314 – 1991/0614/sys/src/9/ss/trap.c:309,315 (short | long | prev | next)
1990/1223		long syscall(Ureg *aur) {
1991/0614		int i;
1990/1223		long ret; ulong sp;
1990/1226		ulong r7;
1991/0604/sys/src/9/ss/trap.c:349,361 – 1991/0614/sys/src/9/ss/trap.c:350,368
1990/1223		msg = "sys: odd stack"; goto Bad; } if(sp<(USTKTOP-BY2PG) || sp>(USTKTOP-5*BY2WD)) validaddr(sp, 5*BY2WD, 0);
1991/0614		if(sp<(USTKTOP-BY2PG) || sp>(USTKTOP-(2+MAXSYSARG)*BY2WD)) validaddr(sp, ((2+MAXSYSARG)*BY2WD), 0);
1990/1226		ret = (*systab[r7])((ulong*)(sp+2*BY2WD));
1991/0614		poperror();
1990/1223		}
1990/1226		ur->pc += 4; ur->npc = ur->pc+4;
1990/1223		u->nerrlab = 0;
1991/0614		if(u->nerrlab){ print("unbalanced error stack: %d extra\n", u->nerrlab); for(i = 0; i < NERR; i++) print("sp=%lux pc=%lux\n", u->errlab[i].sp, u->errlab[i].pc); panic("bad rob"); }
1990/1223		u->p->insyscall = 0;
1990/1226		if(r7 == NOTED) /* ugly hack */
1990/1223		noted(&aur); /* doesn't return */