1991/0711/ss/trap.c (diff list | history)

1991/0710/sys/src/9/ss/trap.c:174,187 – 1991/0711/sys/src/9/ss/trap.c:174,195 (short | long | prev | next)
1990/1223		dumpstack(void) { ulong l, v;
1991/0711		int i;
1990/1223		extern ulong etext;
1991/0711		print("no dumpstack\n"); return;
1990/1223		if(u)
1991/0711		if(u){ i = 0;
1990/1223		for(l=(ulong)&l; l<USERADDR+BY2PG; l+=4){ v = *(ulong*)l; if(KTZERO < v && v < (ulong)&etext) print("%lux=%lux\n", l, v);
1991/0711		print("%lux=%lux ", l, v); ++i; if((i&7) == 0) print("\n");
1990/1223		}
1991/0711		}
1990/1223		} void
1991/0710/sys/src/9/ss/trap.c:316,326 – 1991/0711/sys/src/9/ss/trap.c:324,336
1990/1223		Ureg *ur; char *msg; u->p->insyscall = 1; ur = aur; u->p->pc = ur->pc;
1990/1226		if(ur->psr & PSRPSUPER)
1991/0711		if(ur->psr & PSRPSUPER){ dumpregs(ur);
1990/1223		panic("recursive system call");
1991/0711		} u->p->insyscall = 1; u->p->pc = ur->pc;
1991/01151
1990/1223		/* * since the system call interface does not
1991/0710/sys/src/9/ss/trap.c:330,337 – 1991/0711/sys/src/9/ss/trap.c:340,348
1990/1223		u->p->fpstate = FPinit;
1991/01151		ur->psr &= ~PSREF;
1990/1223		}
1991/01151
1991/0711		print("syscall %d\n", ur->r7);
1990/1223		spllo();
1991/0711		print("got low in syscall\n");
1990/1226		r7 = ur->r7;
1990/1223		sp = ur->usp;
1991/0710/sys/src/9/ss/trap.c:349,354 – 1991/0711/sys/src/9/ss/trap.c:360,369
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		} if(((ulong*)ur->pc)[-2] != 0x82206004){ /* new calling convention: look for ADD $-4, SP */ pprint("new 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);