1990/1231/ss/faultsparc.c (diff list | history)

1990/1227/sys/src/9/ss/faultsparc.c:6,12 – 1990/1231/sys/src/9/ss/faultsparc.c:6,11 (short | long | prev | next)
1990/1223		#include "ureg.h" #include "errno.h"                  void
1990/1226		faultsparc(Ureg *ur)
1990/1223		{
1990/1227/sys/src/9/ss/faultsparc.c:16,43 – 1990/1231/sys/src/9/ss/faultsparc.c:15,44
1990/1223
1990/1227		tbr = (ur->tbr&0xFFF)>>4;
1990/1226		addr = ur->pc; /* assume instr. exception */
1990/1227		if(tbr == 9) /* data access exception */
1990/1231		read = 1; if(tbr == 9){ /* data access exception */ /* * According to the book, this isn't good enough. We'll see. */
1990/1226		addr = getw2(SEVAR);
1990/1227		else if(tbr != 1){ /* should be instruction access exception */
1990/1231		if(getw2(SER) & 0x8000) read = 0; }else if(tbr != 1){ /* should be instr. access exception */
1990/1226		trap(ur);
1990/1227		return;
1990/1226		} spllo();
1990/1227		print("fault: %s pc=0x%lux addr %lux\n", excname(tbr), ur->pc, addr);
1990/1231		/* print("fault: %s pc=0x%lux addr %lux %d\n", excname(tbr), ur->pc, addr, read); /**/
1990/1223		if(u == 0){ dumpregs(ur); panic("fault u==0 pc=%lux", ur->pc); }
1990/1226		if(getw2(SER) & 0x8000) read = 0; else read = 1;
1990/1223		insyscall = u->p->insyscall; u->p->insyscall = 1;
1990/1226		/* addr &= VAMASK; /**/
1990/1223		badvaddr = addr; addr &= ~(BY2PG-1);
1990/1226		user = !(ur->psr&PSRSUPER);
1990/1231		user = !(ur->psr&PSRPSUPER);
1990/1223		if(fault(addr, read) < 0){ if(user){