1994/0514/port/segment.c (diff list | history)

1993/1012/sys/src/9/port/segment.c:405,420 – 1994/0514/sys/src/9/port/segment.c:405,438 (short | long | prev | next)
1991/0705		} }
1994/0514		int isoverlap(Proc *p, ulong va, int len) { int i; Segment *ns; ulong newtop; newtop = va+len; for(i = 0; i < NSEG; i++) { ns = p->seg[i]; if(ns == 0) continue; if((newtop > ns->base && newtop <= ns->top) || (va >= ns->base && va < ns->top)) return 1; } return 0; }
1991/0705		ulong segattach(Proc *p, ulong attr, char *name, ulong va, ulong len) {
1992/0711		Segment *s, *ns;
1991/0705		Physseg *ps; ulong newtop; int i, sno;
1994/0514		Segment *s; Physseg *ps;
1991/0705
1991/1115		USED(p);
1993/0725		if((va&KZERO) == KZERO) /* BUG: Only ok for now */
1994/0514		if(va != 0 && (va&KZERO) == KZERO) /* BUG: Only ok for now */
1992/0114		error(Ebadarg);
1991/0705		validaddr((ulong)name, 1, 0);
1993/1012/sys/src/9/port/segment.c:421,444 – 1994/0514/sys/src/9/port/segment.c:439,466
1991/0705		vmemchr(name, 0, ~0); for(sno = 0; sno < NSEG; sno++)
1993/0501		if(up->seg[sno] == 0 && sno != ESEG)
1994/0514		if(p->seg[sno] == 0 && sno != ESEG)
1991/0705		break; if(sno == NSEG)
1992/0114		error(Enovmem);
1991/0705		va = va&~(BY2PG-1); len = PGROUND(len); newtop = va+len; for(i = 0; i < NSEG; i++) {
1993/0501		ns = up->seg[i];
1991/0705		if(ns == 0) continue;
1991/0803		if((newtop > ns->base && newtop <= ns->top) || (va >= ns->base && va < ns->top))
1992/0824		error(Esoverlap);
1994/0514		/* Find a hole in the address space */ if(va == 0) { va = p->seg[SSEG]->base - len; for(i = 0; i < 20; i++) { if(isoverlap(p, va, len) == 0) break; va -= len; }
1991/0705		}
1994/0514		va = va&~(BY2PG-1); if(isoverlap(p, va, len)) error(Esoverlap);
1991/0731		for(ps = physseg; ps->name; ps++)
1991/0705		if(strcmp(name, ps->name) == 0) goto found;
1993/1012/sys/src/9/port/segment.c:453,461 – 1994/0514/sys/src/9/port/segment.c:475,483
1991/0705		s = newseg(attr, va, len/BY2PG);
1993/0210		s->pseg = ps;
1993/0501		up->seg[sno] = s;
1994/0514		p->seg[sno] = s;
1991/0705		return 0;
1994/0514		return va;
1991/0705		}
1993/0919		void