1991/1105/ss/trap.c (diff list | history)

1991/0926/sys/src/9/ss/trap.c:250,256 – 1991/1105/sys/src/9/ss/trap.c:250,257 (short | long | prev | next)
1991/0318		memmove((char*)sp, u->note[0].msg, ERRLEN);
1990/1223		sp -= 3*BY2WD; *(ulong*)(sp+2*BY2WD) = sp+3*BY2WD; /* arg 2 is string */ *(ulong*)(sp+1*BY2WD) = (ulong)u->ureg; /* arg 1 is ureg* */
1991/1105		*(ulong*)(sp+1*BY2WD) = (ulong)u->ureg; /* arg 1 is ureg* (compat) */ ur->r7 = (ulong)u->ureg; /* arg 1 is ureg* */
1990/1223		*(ulong*)(sp+0*BY2WD) = 0; /* arg 0 is pc */ ur->usp = sp; ur->pc = (ulong)u->notify;
1991/0926/sys/src/9/ss/trap.c:358,367 – 1991/1105/sys/src/9/ss/trap.c:359,364
1990/1223		pprint("odd sp in sys call pc %lux sp %lux\n", ((Ureg*)UREGADDR)->pc, ((Ureg*)UREGADDR)->sp); msg = "sys: odd stack"; goto Bad;
1991/0711		}
1991/0713		if(((ulong*)ur->pc)[-2] == 0x82206004){ /* new calling convention: look for ADD $-4, SP */ pprint("old system call linkage\n"); sp += BY2WD;
1990/1223		}
1991/0713		if(sp<(USTKTOP-BY2PG) || sp>(USTKTOP-(1+MAXSYSARG)*BY2WD)) validaddr(sp, ((1+MAXSYSARG)*BY2WD), 0);