1991/0713/ss/trap.c (diff list | history)

1991/0712/sys/src/9/ss/trap.c:357,369 – 1991/0713/sys/src/9/ss/trap.c:357,369 (short | long | prev | next)
1990/1223		msg = "sys: odd stack"; goto Bad;
1991/0711		} if(((ulong*)ur->pc)[-2] != 0x82206004){ /* new calling convention: look for ADD $-4, SP */ pprint("new system call linkage\n"); sp -= BY2WD;
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		}
1991/0614		if(sp<(USTKTOP-BY2PG) || sp>(USTKTOP-(2+MAXSYSARG)*BY2WD)) validaddr(sp, ((2+MAXSYSARG)*BY2WD), 0);
1990/1226		ret = (*systab[r7])((ulong*)(sp+2*BY2WD));
1991/0713		if(sp<(USTKTOP-BY2PG) || sp>(USTKTOP-(1+MAXSYSARG)*BY2WD)) validaddr(sp, ((1+MAXSYSARG)*BY2WD), 0); ret = (*systab[r7])((ulong*)(sp+1*BY2WD));
1991/0614		poperror();
1990/1223		}
1990/1226		ur->pc += 4;