1990/06021/gnot/fault.c (diff list | history)

1990/0315/sys/src/9/gnot/fault.c:51,61 – 1990/06021/sys/src/9/gnot/fault.c:51,62 (short | long | prev | next)
1990/03091		Orig *o; char *l; Page *pg;
1990/06021		KMap *k, *k1;
1990/03091		int zeroed = 0, head = 1; int i, user, read, insyscall; if(u == 0) panic("fault");
1990/06021		panic("fault u==0 pc=%lux", ur->pc);
1990/03091		insyscall = u->p->insyscall; u->p->insyscall = 1; if(f->ssw & DF)
1990/0315/sys/src/9/gnot/fault.c:149,157 – 1990/06021/sys/src/9/gnot/fault.c:150,160
1990/03091		if(n > BY2PG) n = BY2PG; pg = newpage(1, o, addr);
1990/06021		k = kmap(pg);
1990/03091		qlock(o->chan); if(waserror()){ print("demand load i/o error %d\n", u->error.code);
1990/06021		kunmap(k);
1990/03091		qunlock(o->chan); pg->o = 0; pg->ref--;
1990/0315/sys/src/9/gnot/fault.c:158,172 – 1990/06021/sys/src/9/gnot/fault.c:161,176
1990/03091		goto cant; } o->chan->offset = (addr-o->va) + o->minca; l = (char*)(pg->pa|KZERO);
1990/06021		l = (char*)k->va;
1990/03091		if((*devtab[o->chan->type].read)(o->chan, l, n) != n) error(0, Eioload); qunlock(o->chan); poperror(); /* BUG: if was first page of bss, move to data */ if(n<BY2PG) memset(l+n, 0, BY2PG-n); lock(o);
1990/06021		kunmap(k); poperror();
1990/03091		opte = &o->pte[(addr-s->minva)>>PGSHIFT]; /* could move */ pte = opte; if(pte->page == 0){
1990/0315/sys/src/9/gnot/fault.c:231,237 – 1990/06021/sys/src/9/gnot/fault.c:235,245
1990/03091		opte->page = 0; }else{ /* copy page */ pte->page = newpage(1, o, addr); memcpy((void*)(pte->page->pa|KZERO), (void*)(pg->pa|KZERO), BY2PG);
1990/06021		k = kmap(pte->page); k1 = kmap(pg); memcpy((void*)k->va, (void*)k1->va, BY2PG); kunmap(k); kunmap(k1);
1990/03091		if(pg->ref <= 1) panic("pg->ref <= 1"); pg->ref--;