1992/0802/power/trap.c (diff list | history)

1992/0714/sys/src/9/power/trap.c:75,85 – 1992/0802/sys/src/9/power/trap.c:75,85 (short | long | prev | next)
1990/0227		trap(Ureg *ur) { int ecode; int user; ulong x;
1992/0802		int user, x; ulong fcr31;
1990/0227		char buf[ERRLEN];
1990/1214		SET(x);
1992/0802		SET(fcr31);
1990/0227		ecode = EXCCODE(ur->cause);
1992/0527		LEDON(ecode);
1990/0227		user = ur->status&KUP;
1992/0714/sys/src/9/power/trap.c:92,105 – 1992/0802/sys/src/9/power/trap.c:92,106
1990/0227		if(u && u->p->state==Running){ if(u->p->fpstate == FPactive) { if(ur->cause & INTR3){ /* FP trap */ x = clrfpintr();
1992/0802		fcr31 = clrfpintr(); if(user && fptrap(ur, fcr31)) goto Return;
1990/0227		ecode = FPEXC;
1992/0802		goto Default;
1990/0227		} savefpregs(&u->fpsave); u->p->fpstate = FPinactive; ur->status &= ~CU1; if(ecode == FPEXC) goto Default; }
1991/0209		} intr(ur);
1992/0714/sys/src/9/power/trap.c:151,157 – 1992/0802/sys/src/9/power/trap.c:152,158
1990/0227		if(user){ spllo(); if(ecode == FPEXC)
1990/1110		sprint(buf, "sys: fp: %s FCR31 %lux", fpexcname(x), x);
1992/0802		sprint(buf, "sys: fp: %s FCR31 %lux", fpexcname(fcr31), fcr31);
1990/0227		else
1992/0102		sprint(buf, "sys: %s", excname[ecode]);
1991/0425
1992/0714/sys/src/9/power/trap.c:159,165 – 1992/0802/sys/src/9/power/trap.c:160,166
1990/0227		}else{ print("%s %s pc=%lux\n", user? "user": "kernel", excname[ecode], ur->pc); if(ecode == FPEXC) print("fp: %s FCR31 %lux\n", fpexcname(x), x);
1992/0802		print("fp: %s FCR31 %lux\n", fpexcname(fcr31), fcr31);
1990/0227		dumpregs(ur); if(m->machno == 0) spllo();
1992/0714/sys/src/9/power/trap.c:168,173 – 1992/0802/sys/src/9/power/trap.c:169,175
1990/0227		}
1991/0705
1990/0227		splhi();
1992/0802		Return:
1991/1114		if(user) { notify(ur); if(u->p->fpstate == FPinactive) {
1992/0714/sys/src/9/power/trap.c:600,606 – 1992/0802/sys/src/9/power/trap.c:602,608
1991/1110		}
1991/1111		/* This routine must save the values of registers the user is not permitted to write * from devproc and the restore the saved values before returning
1992/0802		* from devproc and then restore the saved values before returning
1991/1110		*/ void setregisters(Ureg *xp, char *pureg, char *uva, int n)