1990/0511/power/trap.c (diff list | history)

1990/0427/sys/src/9/power/trap.c:5,10 – 1990/0511/sys/src/9/power/trap.c:5,11 (short | long | prev | next)
1990/0227		#include "fns.h" #include "ureg.h" #include "io.h"
1990/0511		#include "errno.h"
1990/0227		/* * vme interrupt routines
1990/0427/sys/src/9/power/trap.c:418,423 – 1990/0511/sys/src/9/power/trap.c:419,425
1990/0227		ulong sp; ulong r1; Ureg *ur;
1990/0511		char *msg;
1990/0227		u->p->insyscall = 1; ur = aur;
1990/0427/sys/src/9/power/trap.c:433,449 – 1990/0511/sys/src/9/power/trap.c:435,459
1990/0227		spllo(); r1 = ur->r1; sp = ur->sp; if(r1 >= sizeof systab/BY2WD) panic("syscall %d\n", r1); if(sp & (BY2WD-1)) panic("syscall odd sp"); if(sp<(USTKTOP-BY2PG) || sp>(USTKTOP-4*BY2WD)) validaddr(ur->sp, 4*BY2WD, 0);                  u->nerrlab = 0; ret = -1; if(!waserror())
1990/0511		if(!waserror()){ if(r1 >= sizeof systab/BY2WD){ pprint("bad sys call number %d pc %lux\n", r1, ((Ureg*)UREGADDR)->pc); msg = "bad sys call"; Bad: postnote(u->p, 1, msg, NDebug); error(0, Ebadarg); } if(sp & (BY2WD-1)){ pprint("odd sp in sys call pc %lux sp %lux\n", ((Ureg*)UREGADDR)->pc, ((Ureg*)UREGADDR)->sp); msg = "odd stack"; goto Bad; } if(sp<(USTKTOP-BY2PG) || sp>(USTKTOP-4*BY2WD)) validaddr(ur->sp, 4*BY2WD, 0);
1990/0227		ret = (*systab[r1])((ulong*)(sp+2*BY2WD));
1990/0511		}
1990/0227		ur->pc += 4; u->nerrlab = 0; splhi();