1991/1110/port/fault.c (diff list | history)

1990/0227/sys/src/9/port/fault.c:138,143 – 1990/0312/sys/src/9/port/fault.c:138,144 (short | long)
1990/0227		* Add to mod list */ pte = newmod();
1990/0312		o->nmod++;
1990/0227		pte->proc = u->p; pte->page = opte->page; pte->page->ref++;
1990/0227/sys/src/9/port/fault.c:210,218 – 1990/0312/sys/src/9/port/fault.c:211,220
1990/0227		Seg *s; if((long)len < 0) panic("validaddr len %lux\n", len);
1990/0312		goto Err;
1990/0227		s = seg(u->p, addr); if(s==0 || addr+len>s->maxva || (write && (s->o->flag&OWRPERM)==0)){
1990/0312		Err:
1990/0227		pprint("invalid address in sys call pc %lux sp %lux\n", ((Ureg*)UREGADDR)->pc, ((Ureg*)UREGADDR)->sp); postnote(u->p, 1, "bad address", NDebug); error(0, Ebadarg);
1990/0312/sys/src/9/port/fault.c:208,223 – 1990/0617/sys/src/9/port/fault.c:208,231 (short | long)
1990/0227		void validaddr(ulong addr, ulong len, int write) { Seg *s;
1990/0617		Seg *s, *ns;
1990/0227		if((long)len < 0)
1990/0312		goto Err;
1990/0227		s = seg(u->p, addr); if(s==0 || addr+len>s->maxva || (write && (s->o->flag&OWRPERM)==0)){
1990/0617		if((long)len < 0){
1990/0312		Err:
1990/0227		pprint("invalid address in sys call pc %lux sp %lux\n", ((Ureg*)UREGADDR)->pc, ((Ureg*)UREGADDR)->sp); postnote(u->p, 1, "bad address", NDebug); error(0, Ebadarg);
1990/0617		} Again: s = seg(u->p, addr); if(s==0) goto Err; if(write && (s->o->flag&OWRPERM)==0) goto Err; if(addr+len > s->maxva){ len -= s->maxva - addr; addr = s->maxva; goto Again;
1990/0227		} }
1990/0617/sys/src/9/port/fault.c:43,51 – 1990/0802/sys/src/9/port/fault.c:43,57 (short | long)
1990/0227		/* grow stack */ o = s->o; n = o->npte;
1990/0802		lock(o); if(waserror()){ unlock(o); pprint("can't allocate stack page\n"); goto cant; }
1990/0227		growpte(o, (s->maxva-addr)>>PGSHIFT);
1990/0802		poperror();
1990/0227		/* stacks grown down, sigh */ lock(o); memcpy(o->pte+(o->npte-n), o->pte, n*sizeof(PTE)); memset(o->pte, 0, (o->npte-n)*sizeof(PTE)); unlock(o);
1990/0802/sys/src/9/port/fault.c:43,51 – 1990/0814/sys/src/9/port/fault.c:43,49 (short | long)
1990/0227		/* grow stack */ o = s->o; n = o->npte;
1990/0802		lock(o); if(waserror()){ unlock(o); pprint("can't allocate stack page\n"); goto cant; }
1990/0802/sys/src/9/port/fault.c:52,57 – 1990/0814/sys/src/9/port/fault.c:50,56
1990/0227		growpte(o, (s->maxva-addr)>>PGSHIFT);
1990/0802		poperror();
1990/0227		/* stacks grown down, sigh */
1990/0814		lock(o);
1990/0227		memcpy(o->pte+(o->npte-n), o->pte, n*sizeof(PTE)); memset(o->pte, 0, (o->npte-n)*sizeof(PTE)); unlock(o);
1990/0814/sys/src/9/port/fault.c:38,44 – 1990/0821/sys/src/9/port/fault.c:38,44 (short | long)
1990/0227		panic("fault"); } s = &u->p->seg[SSEG]; if(s->o==0 || addr<s->maxva-4*1024*1024 || addr>=s->maxva)
1990/0821		if(s->o==0 || addr<s->maxva-USTACKSIZE || addr>=s->maxva)
1990/0227		goto cant; /* grow stack */ o = s->o;
1990/0814/sys/src/9/port/fault.c:223,230 – 1990/0821/sys/src/9/port/fault.c:223,233
1990/0617		} Again: s = seg(u->p, addr); if(s==0) goto Err;
1990/0821		if(s==0){ s = &u->p->seg[SSEG]; if(s->o==0 || addr<s->maxva-USTACKSIZE || addr>=s->maxva) goto Err; }
1990/0617		if(write && (s->o->flag&OWRPERM)==0) goto Err; if(addr+len > s->maxva){
1990/0821/sys/src/9/port/fault.c:142,148 – 1990/1013/sys/src/9/port/fault.c:142,148 (short | long)
1990/0227		/* * Add to mod list */ pte = newmod();
1990/1013		pte = newmod(o);
1990/0312		o->nmod++;
1990/0227		pte->proc = u->p; pte->page = opte->page;
1990/1013/sys/src/9/port/fault.c:98,103 – 1990/1110/sys/src/9/port/fault.c:98,105 (short | long)
1990/0227		qunlock(o->chan); pg->o = 0; pg->ref--;
1990/1110		if(user) pexit("Interrupt", 0);
1990/0227		goto cant; } o->chan->offset = (addr-o->va) + o->minca;
1990/1013/sys/src/9/port/fault.c:218,224 – 1990/1110/sys/src/9/port/fault.c:220,226
1990/0617		if((long)len < 0){
1990/0312		Err:
1990/0227		pprint("invalid address in sys call pc %lux sp %lux\n", ((Ureg*)UREGADDR)->pc, ((Ureg*)UREGADDR)->sp); postnote(u->p, 1, "bad address", NDebug);
1990/1110		postnote(u->p, 1, "sys: bad address", NDebug);
1990/0227		error(0, Ebadarg);
1990/0617		} Again:
1990/1013/sys/src/9/port/fault.c:241,247 – 1990/1110/sys/src/9/port/fault.c:243,249
1990/0227		evenaddr(ulong addr) { if(addr & 3){ postnote(u->p, 1, "odd address", NDebug);
1990/1110		postnote(u->p, 1, "sys: odd address", NDebug);
1990/0227		error(0, Ebadarg); } }
1990/1110/sys/src/9/port/fault.c:98,106 – 1990/1113/sys/src/9/port/fault.c:98,104 (short | long)
1990/0227		qunlock(o->chan); pg->o = 0; pg->ref--;
1990/1110		if(user) pexit("Interrupt", 0);
1990/0227		goto cant;
1990/1113		pexit("load i/o error", 0);
1990/0227		} o->chan->offset = (addr-o->va) + o->minca; l = (char*)(pg->pa|KZERO);
1990/1113/sys/src/9/port/fault.c:94,100 – 1990/11211/sys/src/9/port/fault.c:94,100 (short | long)
1990/0227		pg = newpage(1, o, addr); qlock(o->chan); if(waserror()){ print("demand load i/o error %d\n", u->error.code);
1990/11211		print("demand load i/o error %s\n", u->error);
1990/0227		qunlock(o->chan); pg->o = 0; pg->ref--;
1990/1113/sys/src/9/port/fault.c:103,109 – 1990/11211/sys/src/9/port/fault.c:103,109
1990/0227		o->chan->offset = (addr-o->va) + o->minca; l = (char*)(pg->pa|KZERO); if((*devtab[o->chan->type].read)(o->chan, l, n) != n) error(0, Eioload);
1990/11211		error(Eioload);
1990/0227		qunlock(o->chan); poperror(); /* BUG: if was first page of bss, move to data */
1990/1113/sys/src/9/port/fault.c:143,149 – 1990/11211/sys/src/9/port/fault.c:143,148
1990/0227		* Add to mod list */
1990/1013		pte = newmod(o);
1990/0312		o->nmod++;
1990/0227		pte->proc = u->p; pte->page = opte->page; pte->page->ref++;
1990/1113/sys/src/9/port/fault.c:219,225 – 1990/11211/sys/src/9/port/fault.c:218,224
1990/0312		Err:
1990/0227		pprint("invalid address in sys call pc %lux sp %lux\n", ((Ureg*)UREGADDR)->pc, ((Ureg*)UREGADDR)->sp);
1990/1110		postnote(u->p, 1, "sys: bad address", NDebug);
1990/0227		error(0, Ebadarg);
1990/11211		error(Ebadarg);
1990/0617		} Again: s = seg(u->p, addr);
1990/1113/sys/src/9/port/fault.c:242,248 – 1990/11211/sys/src/9/port/fault.c:241,247
1990/0227		{ if(addr & 3){
1990/1110		postnote(u->p, 1, "sys: odd address", NDebug);
1990/0227		error(0, Ebadarg);
1990/11211		error(Ebadarg);
1990/0227		} }
1990/11211/sys/src/9/port/fault.c:94,100 – 1990/1202/sys/src/9/port/fault.c:94,99 (short | long)
1990/0227		pg = newpage(1, o, addr); qlock(o->chan); if(waserror()){
1990/11211		print("demand load i/o error %s\n", u->error);
1990/0227		qunlock(o->chan); pg->o = 0; pg->ref--;
1990/1202/sys/src/9/port/fault.c:6,16 – 1990/1212/sys/src/9/port/fault.c:6,15 (short | long)
Created. rsc Fri Mar 4 12:44:25 2005
1990/0227		#include "ureg.h" #include "errno.h" void fault(Ureg *ur, int user, int code)
1990/1212		int fault(ulong addr, int read)
1990/0227		{ ulong addr, mmuvirt, mmuphys, n; extern char *excname[];
1990/1212		ulong mmuvirt, mmuphys, n;
1990/0227		Seg *s; PTE *opte, *pte, *npte; Orig *o;
1990/1202/sys/src/9/port/fault.c:18,51 – 1990/1212/sys/src/9/port/fault.c:17,37
1990/0227		Page *pg; int zeroed = 0, head = 1; int i;
1990/1212		KMap *k, *k1;
1990/0227		addr = ur->badvaddr; addr &= ~(BY2PG-1);                  s = seg(u->p, addr); if(s == 0){ if(addr>USTKTOP){ cant: if(user){ pprint("user %s badvaddr=0x%lux\n", excname[code], ur->badvaddr); pprint("status=0x%lux pc=0x%lux sp=0x%lux\n", ur->status, ur->pc, ur->sp); pexit("Suicide", 0); } print("kernel %s badvaddr=0x%lux\n", excname[code], ur->badvaddr); print("status=0x%lux pc=0x%lux sp=0x%lux\n", ur->status, ur->pc, ur->sp); u->p->state = MMUing; dumpregs(ur); panic("fault"); }
1990/1212		if(addr>USTKTOP) return -1;
1990/0227		s = &u->p->seg[SSEG];
1990/0821		if(s->o==0 || addr<s->maxva-USTACKSIZE || addr>=s->maxva)
1990/0227		goto cant;
1990/1212		return -1;
1990/0227		/* grow stack */ o = s->o; n = o->npte;
1990/0802		if(waserror()){ pprint("can't allocate stack page\n"); goto cant;
1990/1212		return -1;
1990/0802		}
1990/0227		growpte(o, (s->maxva-addr)>>PGSHIFT);
1990/0802		poperror();
1990/1202/sys/src/9/port/fault.c:58,65 – 1990/1212/sys/src/9/port/fault.c:44,51
1990/0227		o->va = addr; }else o = s->o; if((code==CTLBM || code==CTLBS) && (o->flag&OWRPERM)==0) goto cant;
1990/1212		if(!read && (o->flag&OWRPERM)==0) return -1;
1990/0227		lock(o); opte = &o->pte[(addr-o->va)>>PGSHIFT]; pte = opte;
1990/1202/sys/src/9/port/fault.c:92,99 – 1990/1212/sys/src/9/port/fault.c:78,87
1990/0227		if(n > BY2PG) n = BY2PG; pg = newpage(1, o, addr);
1990/1212		k = kmap(pg);
1990/0227		qlock(o->chan); if(waserror()){
1990/1212		kunmap(k);
1990/0227		qunlock(o->chan); pg->o = 0; pg->ref--;
1990/1202/sys/src/9/port/fault.c:100,114 – 1990/1212/sys/src/9/port/fault.c:88,102
1990/1113		pexit("load i/o error", 0);
1990/0227		} o->chan->offset = (addr-o->va) + o->minca; l = (char*)(pg->pa|KZERO);
1990/1212		l = (char*)VA(k);
1990/0227		if((*devtab[o->chan->type].read)(o->chan, l, n) != n)
1990/11211		error(Eioload);
1990/0227		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);
1990/1212		kunmap(k); poperror();
1990/0227		opte = &o->pte[(addr-s->minva)>>PGSHIFT]; /* could move */ pte = opte; if(pte->page == 0){
1990/1202/sys/src/9/port/fault.c:121,129 – 1990/1212/sys/src/9/port/fault.c:109,117
1990/0227		} } /* * Copy on reference
1990/1212		* Copy on reference (conf.copymode==1) or write (conf.copymode==0)
1990/0227		*/ if((o->flag & OWRPERM)
1990/1212		if((o->flag & OWRPERM) && (conf.copymode || !read)
1990/0227		&& ((head && ((o->flag&OPURE) || o->nproc>1)) || (!head && pte->page->ref>1))){
1990/1202/sys/src/9/port/fault.c:173,179 – 1990/1212/sys/src/9/port/fault.c:161,171
1990/0227		opte->page = 0; }else{ /* copy page */ pte->page = newpage(1, o, addr); memcpy((void*)(pte->page->pa|KZERO), (void*)(pg->pa|KZERO), BY2PG);
1990/1212		k = kmap(pte->page); k1 = kmap(pg); memcpy((void*)VA(k), (void*)VA(k1), BY2PG); kunmap(k); kunmap(k1);
1990/0227		if(pg->ref <= 1) panic("pg->ref <= 1"); pg->ref--;
1990/1202/sys/src/9/port/fault.c:181,187 – 1990/1212/sys/src/9/port/fault.c:173,179
1990/0227		easy: mmuphys = PTEWRITE; }else{ mmuphys = 0;
1990/1212		mmuphys = PTERONLY;
1990/0227		if(o->flag & OWRPERM) if(o->flag & OPURE){ if(!head && pte->page->ref==1)
1990/1202/sys/src/9/port/fault.c:192,198 – 1990/1212/sys/src/9/port/fault.c:184,190
1990/0227		mmuphys = PTEWRITE; } mmuvirt = addr; mmuphys |= pte->page->pa | PTEVALID;
1990/1212		mmuphys |= PPN(pte->page->pa) | PTEVALID;
1990/0227		usepage(pte->page, 1); if(pte->page->va != addr) panic("wrong addr in tail %lux %lux", pte->page->va, addr);
1990/1202/sys/src/9/port/fault.c:203,208 – 1990/1212/sys/src/9/port/fault.c:195,201
1990/0227		} unlock(o); putmmu(mmuvirt, mmuphys);
1990/1212		return 0;
1990/0227		} /*
1990/1202/sys/src/9/port/fault.c:232,246 – 1990/1212/sys/src/9/port/fault.c:225,230
1990/0617		len -= s->maxva - addr; addr = s->maxva; goto Again;
1990/0227		} }                  void evenaddr(ulong addr) { if(addr & 3){
1990/1110		postnote(u->p, 1, "sys: odd address", NDebug);
1990/11211		error(Ebadarg);
1990/0227		} }
1990/1212/sys/src/9/port/fault.c:21,27 – 1991/0110/sys/src/9/port/fault.c:21,27 (short | long)
1990/0227		s = seg(u->p, addr); if(s == 0){
1990/1212		if(addr>USTKTOP)
1991/0110		if(addr > USTKTOP)
1990/1212		return -1;
1990/0227		s = &u->p->seg[SSEG];
1990/0821		if(s->o==0 || addr<s->maxva-USTACKSIZE || addr>=s->maxva)
1991/0110/sys/src/9/port/fault.c:208,214 – 1991/0115/sys/src/9/port/fault.c:208,214 (short | long)
1990/0227
1990/0617		if((long)len < 0){
1990/0312		Err:
1990/0227		pprint("invalid address in sys call pc %lux sp %lux\n", ((Ureg*)UREGADDR)->pc, ((Ureg*)UREGADDR)->sp);
1991/0115		pprint("invalid address %lux in sys call pc %lux sp %lux\n", addr, ((Ureg*)UREGADDR)->pc, ((Ureg*)UREGADDR)->sp);
1990/1110		postnote(u->p, 1, "sys: bad address", NDebug);
1990/11211		error(Ebadarg);
1990/0617		}
1991/0115/sys/src/9/port/fault.c:91,96 – 1991/0312/sys/src/9/port/fault.c:91,97 (short | long)
1990/1212		l = (char*)VA(k);
1990/0227		if((*devtab[o->chan->type].read)(o->chan, l, n) != n)
1990/11211		error(Eioload);
1991/0312		flushpage(pg->pa);
1990/0227		qunlock(o->chan); if(n<BY2PG) memset(l+n, 0, BY2PG-n);
1991/0312/sys/src/9/port/fault.c:37,43 – 1991/0318/sys/src/9/port/fault.c:37,43 (short | long)
1990/0802		poperror();
1990/0227		/* stacks grown down, sigh */
1990/0814		lock(o);
1990/0227		memcpy(o->pte+(o->npte-n), o->pte, n*sizeof(PTE));
1991/0318		memmove(o->pte+(o->npte-n), o->pte, n*sizeof(PTE));
1990/0227		memset(o->pte, 0, (o->npte-n)*sizeof(PTE)); unlock(o); s->minva = addr;
1991/0312/sys/src/9/port/fault.c:164,170 – 1991/0318/sys/src/9/port/fault.c:164,170
1990/0227		pte->page = newpage(1, o, addr);
1990/1212		k = kmap(pte->page); k1 = kmap(pg); memcpy((void*)VA(k), (void*)VA(k1), BY2PG);
1991/0318		memmove((void*)VA(k), (void*)VA(k1), BY2PG);
1990/1212		kunmap(k); kunmap(k1);
1990/0227		if(pg->ref <= 1)
1991/0318/sys/src/9/port/fault.c:79,98 – 1991/0411/sys/src/9/port/fault.c:79,97 (short | long)
1990/0227		n = BY2PG; pg = newpage(1, o, addr);
1990/1212		k = kmap(pg);
1990/0227		qlock(o->chan);
1991/0411		qlock(&o->chan->rdl);
1990/0227		if(waserror()){
1990/1212		kunmap(k);
1990/0227		qunlock(o->chan);
1991/0411		qunlock(&o->chan->rdl);
1990/0227		pg->o = 0; pg->ref--;
1990/1113		pexit("load i/o error", 0);
1990/0227		} o->chan->offset = (addr-o->va) + o->minca;
1990/1212		l = (char*)VA(k);
1990/0227		if((*devtab[o->chan->type].read)(o->chan, l, n) != n)
1991/0411		if((*devtab[o->chan->type].read)(o->chan, l, n, (addr-o->va) + o->minca) != n)
1990/11211		error(Eioload);
1991/0312		flushpage(pg->pa);
1990/0227		qunlock(o->chan);
1991/0411		qunlock(&o->chan->rdl);
1990/0227		if(n<BY2PG) memset(l+n, 0, BY2PG-n); lock(o);
1991/0411/sys/src/9/port/fault.c:16,22 – 1991/0425/sys/src/9/port/fault.c:16,22 (short | long)
1990/0227		char *l; Page *pg; int zeroed = 0, head = 1; int i;
1991/0425		int i, touched = 0;
1990/1212		KMap *k, *k1;
1990/0227		s = seg(u->p, addr);
1991/0411/sys/src/9/port/fault.c:61,66 – 1991/0425/sys/src/9/port/fault.c:61,67
1990/0227		pte = opte; } if(pte->page == 0){
1991/0425		touched = 1;
1990/0227		if(o->chan==0 || addr>(o->va+(o->maxca-o->minca))){ /* * Zero fill page. If we are really doing a copy-on-write
1991/0411/sys/src/9/port/fault.c:114,120 – 1991/0425/sys/src/9/port/fault.c:115,121
1990/1212		if((o->flag & OWRPERM) && (conf.copymode || !read)
1990/0227		&& ((head && ((o->flag&OPURE) || o->nproc>1)) || (!head && pte->page->ref>1))){
1991/0425		touched = 1;
1990/0227		/* * Look for the easy way out: are we the last non-modified? */
1991/0411/sys/src/9/port/fault.c:194,199 – 1991/0425/sys/src/9/port/fault.c:195,202
1990/0227		panic("addr %lux seg %d wrong proc in tail", addr, s-u->p->seg); } unlock(o);
1991/0425		if(touched == 0) m->tlbfault++;
1990/0227		putmmu(mmuvirt, mmuphys);
1990/1212		return 0;
1990/0227		}
1991/0425/sys/src/9/port/fault.c:19,24 – 1991/0427/sys/src/9/port/fault.c:19,25 (short | long)
1991/0425		int i, touched = 0;
1990/1212		KMap *k, *k1;
1990/0227
1991/0427		m->pfault++;
1990/0227		s = seg(u->p, addr); if(s == 0){
1991/0110		if(addr > USTKTOP)
1991/0427/sys/src/9/port/fault.c:87,93 – 1991/0501/sys/src/9/port/fault.c:87,93 (short | long)
1991/0411		qunlock(&o->chan->rdl);
1990/0227		pg->o = 0; pg->ref--;
1990/1113		pexit("load i/o error", 0);
1991/0501		pexit("demand load i/o error", 0);
1990/0227		}
1990/1212		l = (char*)VA(k);
1991/0411		if((*devtab[o->chan->type].read)(o->chan, l, n, (addr-o->va) + o->minca) != n)
1991/0501/sys/src/9/port/fault.c:25,31 – 1991/0605/sys/src/9/port/fault.c:25,31 (short | long)
1991/0110		if(addr > USTKTOP)
1990/1212		return -1;
1990/0227		s = &u->p->seg[SSEG];
1990/0821		if(s->o==0 || addr<s->maxva-USTACKSIZE || addr>=s->maxva)
1991/0605		if(s->o==0 || addr<s->maxva-USTKSIZE || addr>=s->maxva)
1990/1212		return -1;
1990/0227		/* grow stack */ o = s->o;
1991/0501/sys/src/9/port/fault.c:220,226 – 1991/0605/sys/src/9/port/fault.c:220,226
1990/0617		s = seg(u->p, addr);
1990/0821		if(s==0){ s = &u->p->seg[SSEG]; if(s->o==0 || addr<s->maxva-USTACKSIZE || addr>=s->maxva)
1991/0605		if(s->o==0 || addr<s->maxva-USTKSIZE || addr>=s->maxva)
1990/0821		goto Err; }
1990/0617		if(write && (s->o->flag&OWRPERM)==0)
1991/0605/sys/src/9/port/fault.c:9,15 – 1991/0606/sys/src/9/port/fault.c:9,15 (short | long)
1990/1212		int fault(ulong addr, int read)
1990/0227		{
1990/1212		ulong mmuvirt, mmuphys, n;
1991/0606		ulong mmuvirt, mmuphys = 0, n;
1990/0227		Seg *s; PTE *opte, *pte, *npte; Orig *o;
1991/0605/sys/src/9/port/fault.c:64,76 – 1991/0606/sys/src/9/port/fault.c:64,78
1990/0227		if(pte->page == 0){
1991/0425		touched = 1;
1990/0227		if(o->chan==0 || addr>(o->va+(o->maxca-o->minca))){ /* * Zero fill page. If we are really doing a copy-on-write * (e.g. into shared bss) we'll move the page later. */ pte->page = newpage(0, o, addr); o->npage++;
1991/0606		/* Make a new bss or lock segment page */ if(s - u->p->seg == LSEG) { pte->page = lkpage(o, addr); mmuphys = PTEUNCACHE; } else pte->page = newpage(0, o, addr);
1990/0227		zeroed = 1;
1991/0606		o->npage++;
1990/0227		}else{ /* * Demand load. Release o because it could take a while.
1991/0605/sys/src/9/port/fault.c:157,164 – 1991/0606/sys/src/9/port/fault.c:159,168
1990/0227		head = 0; } pg = pte->page; if(zeroed){ /* move page */ pg->ref--;
1991/0606		/* when creating pages in the bss which are zfod we create a double * increment on the mod list which must be removed */ if(zeroed){
1990/0227		o->npage--; opte->page = 0; }else{ /* copy page */
1991/0605/sys/src/9/port/fault.c:170,189 – 1991/0606/sys/src/9/port/fault.c:174,194
1990/1212		kunmap(k1);
1990/0227		if(pg->ref <= 1) panic("pg->ref <= 1"); pg->ref--; }
1991/0606		pg->ref--;
1990/0227		easy: mmuphys = PTEWRITE;
1991/0606		mmuphys |= PTEWRITE;
1990/0227		}else{
1990/1212		mmuphys = PTERONLY;
1991/0606		mmuphys |= PTERONLY;
1990/0227		if(o->flag & OWRPERM) if(o->flag & OPURE){ if(!head && pte->page->ref==1) mmuphys = PTEWRITE;
1991/0606		mmuphys |= PTEWRITE;
1990/0227		}else if((head && o->nproc==1) || (!head && pte->page->ref==1)) mmuphys = PTEWRITE;
1991/0606		mmuphys |= PTEWRITE;
1990/0227		} mmuvirt = addr;
1990/1212		mmuphys |= PPN(pte->page->pa) | PTEVALID;
1991/0605/sys/src/9/port/fault.c:212,218 – 1991/0606/sys/src/9/port/fault.c:217,224
1990/0227
1990/0617		if((long)len < 0){
1990/0312		Err:
1991/0115		pprint("invalid address %lux in sys call pc %lux sp %lux\n", addr, ((Ureg*)UREGADDR)->pc, ((Ureg*)UREGADDR)->sp);
1991/0606		pprint("invalid address %lux in sys call pc %lux sp %lux\n", addr, ((Ureg*)UREGADDR)->pc, ((Ureg*)UREGADDR)->sp);
1990/1110		postnote(u->p, 1, "sys: bad address", NDebug);
1990/11211		error(Ebadarg);
1990/0617		}
1991/0605/sys/src/9/port/fault.c:261,270 – 1991/0606/sys/src/9/port/fault.c:267,276
1990/0227		Seg* seg(Proc *p, ulong addr) { int i; Seg *s;
1991/0606		Seg *s, *et;
1990/0227		for(i=0,s=p->seg; i<NSEG; i++,s++)
1991/0606		et = &p->seg[NSEG]; for(s=p->seg; s < et; s++)
1990/0227		if(s->o && s->minva<=addr && addr<s->maxva) return s; return 0;
1991/0606/sys/src/9/port/fault.c:9,15 – 1991/0607/sys/src/9/port/fault.c:9,15 (short | long)
1990/1212		int fault(ulong addr, int read)
1990/0227		{
1991/0606		ulong mmuvirt, mmuphys = 0, n;
1991/0607		ulong mmuvirt, mmuphys, uncache = 0, n;
1990/0227		Seg *s; PTE *opte, *pte, *npte; Orig *o;
1991/0606/sys/src/9/port/fault.c:67,73 – 1991/0607/sys/src/9/port/fault.c:67,77
1991/0606		/* Make a new bss or lock segment page */ if(s - u->p->seg == LSEG) { pte->page = lkpage(o, addr); mmuphys = PTEUNCACHE;
1991/0607		if(pte->page == 0) { unlock(o); return -1; } uncache = PTEUNCACHED;
1991/0606		} else pte->page = newpage(0, o, addr);
1991/0606/sys/src/9/port/fault.c:115,123 – 1991/0607/sys/src/9/port/fault.c:119,130
1990/0227		/*
1990/1212		* Copy on reference (conf.copymode==1) or write (conf.copymode==0)
1990/0227		*/
1990/1212		if((o->flag & OWRPERM) && (conf.copymode || !read)
1991/0607		if((o->flag & (OWRPERM|OSHARED))==OWRPERM && (conf.copymode || !read)
1990/0227		&& ((head && ((o->flag&OPURE) || o->nproc>1)) || (!head && pte->page->ref>1))){
1991/0607		if(!(o->flag&OISMEM)) panic("copy on ref/wr to non memory");
1991/0425		touched = 1;
1990/0227		/* * Look for the easy way out: are we the last non-modified?
1991/0606/sys/src/9/port/fault.c:163,168 – 1991/0607/sys/src/9/port/fault.c:170,176
1991/0606		* increment on the mod list which must be removed */ if(zeroed){
1991/0607		pg->ref--;
1990/0227		o->npage--; opte->page = 0; }else{ /* copy page */
1991/0606/sys/src/9/port/fault.c:174,198 – 1991/0607/sys/src/9/port/fault.c:182,208
1990/1212		kunmap(k1);
1990/0227		if(pg->ref <= 1) panic("pg->ref <= 1");
1991/0607		pg->ref--;
1990/0227		}
1991/0606		pg->ref--;
1990/0227		easy:
1991/0606		mmuphys |= PTEWRITE;
1991/0607		mmuphys = PTEWRITE;
1990/0227		}else{
1991/0606		mmuphys |= PTERONLY;
1991/0607		mmuphys = PTERONLY;
1990/0227		if(o->flag & OWRPERM) if(o->flag & OPURE){ if(!head && pte->page->ref==1)
1991/0606		mmuphys |= PTEWRITE;
1991/0607		mmuphys = PTEWRITE;
1990/0227		}else if((head && o->nproc==1) || (!head && pte->page->ref==1))
1991/0606		mmuphys |= PTEWRITE;
1991/0607		mmuphys = PTEWRITE;
1990/0227		} mmuvirt = addr;
1990/1212		mmuphys |= PPN(pte->page->pa) | PTEVALID;
1990/0227		usepage(pte->page, 1);
1991/0607		mmuphys |= PPN(pte->page->pa) | PTEVALID | uncache; if(o->flag&OISMEM) usepage(pte->page, 1);
1990/0227		if(pte->page->va != addr) panic("wrong addr in tail %lux %lux", pte->page->va, addr); if(pte->proc && pte->proc != u->p){
1991/0606/sys/src/9/port/fault.c:200,208 – 1991/0607/sys/src/9/port/fault.c:210,220
1990/0227		print("u->p %lux pte->proc %lux\n", u->p, pte->proc); panic("addr %lux seg %d wrong proc in tail", addr, s-u->p->seg); }
1991/0607
1990/0227		unlock(o);
1991/0425		if(touched == 0) m->tlbfault++;
1991/0607
1990/0227		putmmu(mmuvirt, mmuphys);
1990/1212		return 0;
1990/0227		}
1991/0607/sys/src/9/port/fault.c:9,15 – 1991/0608/sys/src/9/port/fault.c:9,15 (short | long)
1990/1212		int fault(ulong addr, int read)
1990/0227		{
1991/0607		ulong mmuvirt, mmuphys, uncache = 0, n;
1991/0608		ulong mmuvirt, mmuphys, n;
1990/0227		Seg *s; PTE *opte, *pte, *npte; Orig *o;
1991/0607/sys/src/9/port/fault.c:71,77 – 1991/0608/sys/src/9/port/fault.c:71,76
1991/0607		unlock(o); return -1; } uncache = PTEUNCACHED;
1991/0606		} else pte->page = newpage(0, o, addr);
1991/0607/sys/src/9/port/fault.c:116,127 – 1991/0608/sys/src/9/port/fault.c:115,133
1990/0227		} } } /*
1990/1212		* Copy on reference (conf.copymode==1) or write (conf.copymode==0)
1990/0227		*/
1991/0607		if((o->flag & (OWRPERM|OSHARED))==OWRPERM && (conf.copymode || !read)
1991/0608		if(o->flag&OSHARED) { /* BUG: Does not cover enough flag options to shared data */ mmuphys = PTERONLY; if(o->flag & OWRPERM) mmuphys = PTEWRITE; } else if((o->flag&OWRPERM) && (conf.copymode || !read)
1990/0227		&& ((head && ((o->flag&OPURE) || o->nproc>1)) || (!head && pte->page->ref>1))){
1991/0608		/* * Copy on reference (conf.copymode==1) or write (conf.copymode==0) */
1991/0607		if(!(o->flag&OISMEM)) panic("copy on ref/wr to non memory");
1991/0607/sys/src/9/port/fault.c:199,207 – 1991/0608/sys/src/9/port/fault.c:205,217
1991/0607		mmuphys = PTEWRITE;
1990/0227		} mmuvirt = addr;
1991/0607		mmuphys |= PPN(pte->page->pa) | PTEVALID | uncache; if(o->flag&OISMEM)
1991/0608		/* Non memory is always uncached */ if(o->flag&OISMEM) { mmuphys |= PPN(pte->page->pa) | PTEVALID;
1991/0607		usepage(pte->page, 1);
1991/0608		}else mmuphys |= PPN(pte->page->pa) | PTEVALID | PTEUNCACHED;
1991/0607
1990/0227		if(pte->page->va != addr) panic("wrong addr in tail %lux %lux", pte->page->va, addr);
1991/0607/sys/src/9/port/fault.c:216,221 – 1991/0608/sys/src/9/port/fault.c:226,235
1991/0425		m->tlbfault++;
1991/0607
1990/0227		putmmu(mmuvirt, mmuphys);
1991/0608		/* if(s - u->p->seg == LSEG) print("%d: f %lux v %lux p %lux\n", u->p->pid, o->flag, mmuvirt, mmuphys); */
1990/1212		return 0;
1990/0227		}
1991/0608/sys/src/9/port/fault.c:226,235 – 1991/0611/sys/src/9/port/fault.c:226,231 (short | long)
1991/0425		m->tlbfault++;
1991/0607
1990/0227		putmmu(mmuvirt, mmuphys);
1991/0608		/* if(s - u->p->seg == LSEG) print("%d: f %lux v %lux p %lux\n", u->p->pid, o->flag, mmuvirt, mmuphys); */
1990/1212		return 0;
1990/0227		}
1991/0608/sys/src/9/port/fault.c:299,303 – 1991/0611/sys/src/9/port/fault.c:295,300
1991/0606		for(s=p->seg; s < et; s++)
1990/0227		if(s->o && s->minva<=addr && addr<s->maxva) return s;
1991/0611
1990/0227		return 0; }
1991/0611/sys/src/9/port/fault.c:264,270 – 1991/0619/sys/src/9/port/fault.c:264,270 (short | long)
1990/0227		* &s[0] is known to be a valid address. */ void* vmemchr(void *s, int c, int n)
1991/0619		vmemchr(void *s, int c, ulong n)
1990/0227		{ int m; char *t;
1991/0611/sys/src/9/port/fault.c:272,289 – 1991/0619/sys/src/9/port/fault.c:272,292
1990/0227		a = (ulong)s; m = BY2PG - (a & (BY2PG-1)); if(m < n){ t = vmemchr(s, c, m);
1991/0619		while(n){ if(n < m) m = n; t = memchr(s, c, m);
1990/0227		if(t) return t;
1991/0619		if(n == m) return 0;
1990/0227		if(!(a & KZERO)) validaddr(a+m, 1, 0); return vmemchr((void*)(a+m), c, n-m);
1991/0619		n -= m; a += m; m = BY2PG;
1990/0227		} /* * All in one page */ return memchr(s, c, n);
1991/0619		return 0;
1990/0227		} Seg*
Too many diffs (26 > 25). Stopping.