## diffname port/segment.c 1991/0705
## diff -e /dev/null /n/bootesdump/1991/0705/sys/src/9/port/segment.c
0a
#include "u.h"
#include "lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "ureg.h"
#include "errno.h"
#define DPRINT
Page *lkpage(ulong addr);
Page *snewpage(ulong addr);
void lkpgfree(Page*);
/* System specific segattach devices */
#include "segment.h"
#define IHASHSIZE 64
#define ihash(s) imagealloc.hash[s%IHASHSIZE]
struct Imagealloc
{
Lock;
Image *free;
Image *hash[IHASHSIZE];
}imagealloc;
struct segalloc
{
Lock;
Segment *free;
}segalloc;
void
initseg(void)
{
Segment *s, *se;
Image *i, *ie;
segalloc.free = ialloc(conf.nseg*sizeof(Segment), 0);
imagealloc.free = ialloc(conf.nimage*sizeof(Image), 0);
se = &segalloc.free[conf.nseg-1];
for(s = segalloc.free; s < se; s++)
s->next = s+1;
s->next = 0;
ie = &imagealloc.free[conf.nimage-1];
for(i = imagealloc.free; i < ie; i++)
i->next = i+1;
i->next = 0;
}
Segment *
newseg(int type, ulong base, ulong size)
{
Segment *s;
if(size > (SEGMAPSIZE*PTEPERTAB))
errors("segment too large");
for(;;) {
lock(&segalloc);
if(s = segalloc.free) {
segalloc.free = s->next;
unlock(&segalloc);
s->ref = 1;
s->steal = 0;
s->type = type;
s->base = base;
s->top = base+(size*BY2PG);
s->size = size;
s->image = 0;
s->fstart = 0;
s->flen = 0;
s->pgalloc = 0;
s->pgfree = 0;
memset(s->map, 0, sizeof(s->map));
return s;
}
unlock(&segalloc);
resrcwait("no segments");
}
}
void
putseg(Segment *s)
{
Pte **pp, **emap;
Image *i;
if(s && decref(s) == 0) {
emap = &s->map[SEGMAPSIZE];
for(pp = s->map; pp < emap; pp++)
if(*pp)
freepte(s, *pp);
if(i = s->image) {
lock(i);
if(i->s == s)
i->s = 0;
unlock(i);
putimage(i);
}
lock(&segalloc);
s->next = segalloc.free;
segalloc.free = s;
unlock(&segalloc);
}
}
void
relocateseg(Segment *s, ulong offset)
{
Pte **p, **endpte;
Page **pg, **endpages;
endpte = &s->map[SEGMAPSIZE];
for(p = s->map; p < endpte; p++)
if(*p) {
endpages = &((*p)->pages[PTEPERTAB]);
for(pg = (*p)->pages; pg < endpages; pg++)
if(*pg)
(*pg)->va += offset;
}
}
Segment*
dupseg(Segment *s)
{
Pte *pte;
Segment *n;
int i;
switch(s->type&SG_TYPE) {
case SG_TEXT: /* new segment shares pte set */
case SG_SHARED:
case SG_PHYSICAL:
incref(s);
return s;
case SG_DATA: /* copy on write both old and new plus demand load info */
lock(s);
n = newseg(s->type, s->base, s->size);
incref(s->image);
n->image = s->image;
n->fstart = s->fstart;
n->flen = s->flen;
copypte:
for(i = 0; i < SEGMAPSIZE; i++)
if(pte = s->map[i])
n->map[i] = ptecpy(pte);
unlock(s);
return n;
case SG_BSS: /* Just copy on write */
case SG_STACK:
lock(s);
n = newseg(s->type, s->base, s->size);
goto copypte;
}
panic("dupseg");
}
void
segpage(Segment *s, Page *p)
{
Pte **pte;
ulong off;
if(p->va < s->base || p->va >= s->top)
panic("segpage");
off = p->va - s->base;
pte = &s->map[off/PTEMAPMEM];
if(*pte == 0)
*pte = ptealloc();
(*pte)->pages[(off&(PTEMAPMEM-1))/BY2PG] = p;
}
Image*
attachimage(int type, Chan *c, ulong base, ulong len)
{
Image *i, **l;
lock(&imagealloc);
for(i = ihash(c->qid.path); i; i = i->hash) {
if(c->qid.path == i->qid.path) {
lock(i);
if(eqqid(c->qid, i->qid))
if(eqqid(c->mqid, i->mqid))
if(c->mchan == i->mchan)
if(c->type == i->type) {
i->ref++;
goto found;
}
unlock(i);
}
}
while(!(i = imagealloc.free)) {
unlock(&imagealloc);
resrcwait("no images");
lock(&imagealloc);
}
imagealloc.free = i->next;
lock(i);
incref(c);
i->c = c;
i->type = c->type;
i->qid = c->qid;
i->mqid = c->mqid;
i->mchan = c->mchan;
i->ref = 1;
l = &ihash(c->qid.path);
i->hash = *l;
*l = i;
found:
unlock(&imagealloc);
if(i->s == 0) {
i->s = newseg(type, base, len);
i->s->image = i;
}
else
incref(i->s);
unlock(i);
return i;
}
void
putimage(Image *i)
{
Image *f, **l;
Chan *c;
if(i == &swapimage)
return;
lock(i);
if(--i->ref == 0) {
l = &ihash(i->qid.path);
i->qid = (Qid){~0, ~0};
unlock(i);
c = i->c;
lock(&imagealloc);
for(f = *l; f; f = f->hash) {
if(f == i) {
*l = i->hash;
break;
}
l = &f->hash;
}
i->next = imagealloc.free;
imagealloc.free = i;
unlock(&imagealloc);
close(c); /* Delay close because we could error */
return;
}
unlock(i);
}
long
ibrk(ulong addr, int seg) /* Called with a locked segment */
{
Segment *s, *ns;
ulong newtop, newsize;
int i;
s = u->p->seg[seg];
if(s == 0)
errors("no segment");
qlock(&s->lk);
if(addr == 0)
return s->base;
if(addr < s->base) {
/* We may start with the bss overlapping the data */
if(seg != BSEG || u->p->seg[DSEG] == 0 || addr < u->p->seg[DSEG]->base) {
qunlock(&s->lk);
pprint("addr below segment\n");
}
addr = s->base;
}
newtop = PGROUND(addr);
newsize = (newtop-s->base)/BY2PG;
if(newtop < s->top) {
print("down brk\n");
mfreeseg(s, newtop, (s->top-newtop)/BY2PG);
qunlock(&s->lk);
return 0;
}
if(newsize > (PTEMAPMEM*SEGMAPSIZE)/BY2PG) {
qunlock(&s->lk);
pprint("exceeded max segment size\n");
pexit("Suicide", 0);
error(Esegaddr);
}
for(i = 0; i < NSEG; i++) {
ns = u->p->seg[i];
if(ns == 0 || ns == s)
continue;
if(newtop >= ns->base && newtop < ns->top) {
qunlock(&s->lk);
pprint("segments overlap\n");
pexit("Suicide", 0);
error(Esegaddr);
}
}
s->top = newtop;
s->size = newsize;
qunlock(&s->lk);
return 0;
}
void
mfreeseg(Segment *s, ulong start, int pages)
{
int i, j;
ulong soff;
Page *pg;
soff = start-s->base;
j = (soff&(PTEMAPMEM-1))/BY2PG;
for(i = soff/PTEMAPMEM; i < SEGMAPSIZE; i++) {
if(pages <= 0)
goto done;
if(s->map[i]) {
while(j < PTEPERTAB) {
if(pg = s->map[i]->pages[j]) {
putpage(pg);
s->map[i]->pages[j] = 0;
}
if(--pages == 0)
goto done;
j++;
}
j = 0;
}
else
pages -= PTEMAPMEM/BY2PG;
}
done:
flushmmu();
}
ulong
segattach(Proc *p, ulong attr, char *name, ulong va, ulong len)
{
Segment *s, *ns, *new;
Physseg *ps;
ulong newtop;
int i, sno;
if(va&KZERO) /* BUG: Only ok for now */
errors("bad virtual address");
validaddr((ulong)name, 1, 0);
vmemchr(name, 0, ~0);
for(sno = 0; sno < NSEG; sno++)
if(u->p->seg[sno] == 0 && sno != ESEG)
break;
if(sno == NSEG)
errors("no per process segments");
va = va&~(BY2PG-1);
len = PGROUND(len);
newtop = va+len;
for(i = 0; i < NSEG; i++) {
ns = u->p->seg[i];
if(ns == 0)
continue;
if(newtop >= ns->base && newtop < ns->top)
errors("segments overlap");
}
for(ps = physseg; *(ps->name); ps++)
if(strcmp(name, ps->name) == 0)
goto found;
errors("bad segment name");
found:
if(len > ps->size)
errors("segment too long");
attr &= ~SG_TYPE; /* Turn off what we are not allowed */
attr |= ps->attr; /* Copy in defaults */
s = newseg(attr, va, len/BY2PG);
s->pgalloc = ps->pgalloc;
s->pgfree = ps->pgfree;
u->p->seg[sno] = s;
/* Need some code build mapped devices here */
return 0;
}
long
syssegflush(ulong *arg)
{
Segment *s;
int i, j, pages;
ulong soff;
Page *pg;
s = seg(u->p, arg[0], 1);
if(s == 0)
errors("bad segment address");
soff = arg[0]-s->base;
j = (soff&(PTEMAPMEM-1))/BY2PG;
pages = ((arg[0]+arg[1]+(BY2PG-1))&~(BY2PG-1))-(arg[0]&~(BY2PG-1));
for(i = soff/PTEMAPMEM; i < SEGMAPSIZE; i++) {
if(pages <= 0)
goto done;
if(s->map[i]) {
while(j < PTEPERTAB) {
if(pg = s->map[i]->pages[j])
memset(pg->cachectl, PG_TXTFLUSH, sizeof pg->cachectl);
if(--pages == 0)
goto done;
j++;
}
j = 0;
}
else
pages -= PTEMAPMEM/BY2PG;
}
done:
qunlock(&s->lk);
flushmmu();
}
Page*
snewpage(ulong addr)
{
return newpage(1, 0, addr);
}
.
## diffname port/segment.c 1991/0706
## diff -e /n/bootesdump/1991/0705/sys/src/9/port/segment.c /n/bootesdump/1991/0706/sys/src/9/port/segment.c
429a
s->flushme = 1;
.
274c
ibrk(ulong addr, int seg)
.
238a
imagereclaim(void)
{
Page *p;
if(!canqlock(&ireclaim)) /* Somebody is already cleaning the page cache */
return;
lock(&palloc);
for(p = palloc.head; p; p = p->next) {
if(p->image == 0)
continue;
unlock(&palloc);
lockpage(p);
if(p->ref == 0 && p->image != &swapimage)
uncachepage(p);
unlockpage(p);
lock(&palloc);
}
unlock(&palloc);
qunlock(&ireclaim);
}
void
.
206a
imagereclaim();
.
190a
/* Search the image cache for remains of the text from a previous incarnation */
.
157,161d
155c
n->flushme = s->flushme;
qunlock(&s->lk);
.
146a
case SG_DATA: /* Copy on write plus demand load info */
qlock(&s->lk);
n = newseg(s->type, s->base, s->size);
.
145a
goto copypte;
.
143,144c
case SG_BSS: /* Just copy on write */
case SG_STACK:
qlock(&s->lk);
.
138c
case SG_TEXT: /* New segment shares pte set */
.
77a
s->flushme = 0;
.
32a
static QLock ireclaim;
.
13a
void imagereclaim(void);
.
## diffname port/segment.c 1991/0710
## diff -e /n/bootesdump/1991/0706/sys/src/9/port/segment.c /n/bootesdump/1991/0710/sys/src/9/port/segment.c
217c
resrcwait(0);
.
## diffname port/segment.c 1991/0724
## diff -e /n/bootesdump/1991/0710/sys/src/9/port/segment.c /n/bootesdump/1991/0724/sys/src/9/port/segment.c
244d
213a
/*
* imagereclaim dumps pages from the free list which are cached by image
* structures. This should free some image structures.
*/
.
199c
/*
* Search the image cache for remains of the text from a previous
* or currently running incarnation
*/
.
## diffname port/segment.c 1991/0726
## diff -e /n/bootesdump/1991/0724/sys/src/9/port/segment.c /n/bootesdump/1991/0726/sys/src/9/port/segment.c
401c
pages -= PTEPERTAB-j;
j = 0;
.
398d
103,110d
97c
if(s == 0)
return;
i = s->image;
if(i && i->s == s && s->ref == 1){
lock(i);
if(s->ref == 1)
i->s = 0;
unlock(i);
}
if(decref(s) == 0) {
if(i)
putimage(i);
.
## diffname port/segment.c 1991/0731
## diff -e /n/bootesdump/1991/0726/sys/src/9/port/segment.c /n/bootesdump/1991/0731/sys/src/9/port/segment.c
445c
for(ps = physseg; ps->name; ps++)
.
## diffname port/segment.c 1991/0803
## diff -e /n/bootesdump/1991/0731/sys/src/9/port/segment.c /n/bootesdump/1991/0803/sys/src/9/port/segment.c
441c
if((newtop > ns->base && newtop <= ns->top) ||
(va >= ns->base && va < ns->top))
.
## diffname port/segment.c 1991/0830
## diff -e /n/bootesdump/1991/0803/sys/src/9/port/segment.c /n/bootesdump/1991/0830/sys/src/9/port/segment.c
357,359c
return -1;
.
## diffname port/segment.c 1991/1005
## diff -e /n/bootesdump/1991/0830/sys/src/9/port/segment.c /n/bootesdump/1991/1005/sys/src/9/port/segment.c
349d
## diffname port/segment.c 1991/1024
## diff -e /n/bootesdump/1991/1005/sys/src/9/port/segment.c /n/bootesdump/1991/1024/sys/src/9/port/segment.c
280,281d
278d
273a
if(p == 0)
break;
.
268,271c
for(;;) {
lock(&palloc);
for(p = palloc.head; p; p = p->next)
if(p->image && p->ref == 0 && p->image != &swapimage)
break;
.
## diffname port/segment.c 1991/1105
## diff -e /n/bootesdump/1991/1024/sys/src/9/port/segment.c /n/bootesdump/1991/1105/sys/src/9/port/segment.c
367d
## diffname port/segment.c 1991/1109
## diff -e /n/bootesdump/1991/1105/sys/src/9/port/segment.c /n/bootesdump/1991/1109/sys/src/9/port/segment.c
115a
qunlock(&s->lk);
.
108a
qlock(&s->lk);
.
## diffname port/segment.c 1991/1115
## diff -e /n/bootesdump/1991/1109/sys/src/9/port/segment.c /n/bootesdump/1991/1115/sys/src/9/port/segment.c
420a
USED(p);
.
## diffname port/segment.c 1991/1122
## diff -e /n/bootesdump/1991/1115/sys/src/9/port/segment.c /n/bootesdump/1991/1122/sys/src/9/port/segment.c
198c
pg = &(*pte)->pages[(off&(PTEMAPMEM-1))/BY2PG];
*pg = p;
if(pg < (*pte)->first)
(*pte)->first = pg;
if(pg > (*pte)->last)
(*pte)->last = pg;
.
188a
Page **pg;
.
## diffname port/segment.c 1991/1125
## diff -e /n/bootesdump/1991/1122/sys/src/9/port/segment.c /n/bootesdump/1991/1125/sys/src/9/port/segment.c
351,352c
errors("addr below segment");
}
.
346a
qlock(&s->lk);
.
342,343d
## diffname port/segment.c 1991/1219
## diff -e /n/bootesdump/1991/1125/sys/src/9/port/segment.c /n/bootesdump/1991/1219/sys/src/9/port/segment.c
9,10d
## diffname port/segment.c 1992/0111
## diff -e /n/bootesdump/1991/1219/sys/src/9/port/segment.c /n/bootesdump/1992/0111/sys/src/9/port/segment.c
7c
#include "../port/error.h"
.
## diffname port/segment.c 1992/0114
## diff -e /n/bootesdump/1992/0111/sys/src/9/port/segment.c /n/bootesdump/1992/0114/sys/src/9/port/segment.c
483c
error(Ebadarg);
.
458c
error(Enovmem);
.
455c
error(Ebadarg);
.
448c
error(Enovmem);
.
437c
error(Enovmem);
.
427c
error(Ebadarg);
.
374c
error(Enovmem);
.
349c
error(Enovmem);
.
338c
error(Ebadarg);
.
60c
error(Enovmem);
.
## diffname port/segment.c 1992/0120
## diff -e /n/bootesdump/1992/0114/sys/src/9/port/segment.c /n/bootesdump/1992/0120/sys/src/9/port/segment.c
6d
## diffname port/segment.c 1992/0225
## diff -e /n/bootesdump/1992/0120/sys/src/9/port/segment.c /n/bootesdump/1992/0225/sys/src/9/port/segment.c
285c
if(p->ref == 0)
.
277c
if(p->image)
if(p->ref == 0)
if(p->image != &swapimage)
.
## diffname port/segment.c 1992/0307
## diff -e /n/bootesdump/1992/0225/sys/src/9/port/segment.c /n/bootesdump/1992/0307/sys/src/9/port/segment.c
434c
if(u->p->seg[sno] == 0)
if(sno != ESEG)
.
372c
if(newtop >= ns->base)
if(newtop < ns->top) {
.
150a
case SG_SHDATA:
.
## diffname port/segment.c 1992/0310
## diff -e /n/bootesdump/1992/0307/sys/src/9/port/segment.c /n/bootesdump/1992/0310/sys/src/9/port/segment.c
291a
if(conf.cntrlp)
print("ireclaim done %lud\n", TK2MS(MACHP(0)->ticks));
.
274a
if(conf.cntrlp)
print("ireclaim %lud\n", TK2MS(MACHP(0)->ticks));
.
## diffname port/segment.c 1992/0314
## diff -e /n/bootesdump/1992/0310/sys/src/9/port/segment.c /n/bootesdump/1992/0314/sys/src/9/port/segment.c
295,298d
287,293d
283,285c
if(p->image != &swapimage) {
lockpage(p);
if(p->ref == 0)
uncachepage(p);
unlockpage(p);
}
}
.
280c
for(p = palloc.head; p; p = p->next) {
.
275,277d
168a
.
98c
if(i)
if(i->s == s)
if(s->ref == 1) {
.
## diffname port/segment.c 1992/0321
## diff -e /n/bootesdump/1992/0314/sys/src/9/port/segment.c /n/bootesdump/1992/0321/sys/src/9/port/segment.c
2c
#include "../port/lib.h"
.
## diffname port/segment.c 1992/0404
## diff -e /n/bootesdump/1992/0321/sys/src/9/port/segment.c /n/bootesdump/1992/0404/sys/src/9/port/segment.c
291a
unlock(&palloc);
.
290d
283,288c
uncachepage(p);
unlockpage(p);
.
278,281c
lock(&palloc);
for(p = palloc.head; p; p = p->next) {
if(p->image)
if(p->ref == 0)
if(p->image != &swapimage) {
lockpage(p);
.
## diffname port/segment.c 1992/0430
## diff -e /n/bootesdump/1992/0404/sys/src/9/port/segment.c /n/bootesdump/1992/0430/sys/src/9/port/segment.c
164a
if(share && s->ref == 1) {
s->type = (s->type&~SG_TYPE)|SG_SHDATA;
incref(s);
qunlock(&s->lk);
return s;
}
.
162a
case SG_BSS: /* Just copy on write */
qlock(&s->lk);
if(share && s->ref == 1) {
s->type = (s->type&~SG_TYPE)|SG_SHARED;
incref(s);
qunlock(&s->lk);
return s;
}
n = newseg(s->type, s->base, s->size);
goto copypte;
.
157d
143c
dupseg(Segment *s, int share)
.
## diffname port/segment.c 1992/0520
## diff -e /n/bootesdump/1992/0430/sys/src/9/port/segment.c /n/bootesdump/1992/0520/sys/src/9/port/segment.c
526a
return 0;
.
198a
return 0; /* not reached */
.
85a
return 0; /* not reached */
.
## diffname port/segment.c 1992/0619
## diff -e /n/bootesdump/1992/0520/sys/src/9/port/segment.c /n/bootesdump/1992/0619/sys/src/9/port/segment.c
240,243c
if(eqqid(c->qid, i->qid) &&
eqqid(c->mqid, i->mqid) &&
c->mchan == i->mchan &&
c->type == i->type) {
.
120,123c
free(s);
.
61,86c
s = smalloc(sizeof(Segment));
s->ref = 1;
s->type = type;
s->base = base;
s->top = base+(size*BY2PG);
s->size = size;
return s;
.
39,46c
imagealloc.free = xalloc(conf.nimage*sizeof(Image));
.
25,30d
## diffname port/segment.c 1992/0621
## diff -e /n/bootesdump/1992/0619/sys/src/9/port/segment.c /n/bootesdump/1992/0621/sys/src/9/port/segment.c
363d
30d
## diffname port/segment.c 1992/0625
## diff -e /n/bootesdump/1992/0621/sys/src/9/port/segment.c /n/bootesdump/1992/0625/sys/src/9/port/segment.c
304c
close(c);
.
279a
Image *f, **l;
.
278d
272c
qunlock(&imagealloc.ireclaim);
.
268c
unlock(p);
.
262,265c
if(p->image && p->ref == 0 && p->image != &swapimage) {
lock(p);
.
257c
/* Somebody is already cleaning the page cache */
if(!canqlock(&imagealloc.ireclaim))
.
25,26d
22a
QLock ireclaim;
.
18c
struct
.
## diffname port/segment.c 1992/0711
## diff -e /n/bootesdump/1992/0625/sys/src/9/port/segment.c /n/bootesdump/1992/0711/sys/src/9/port/segment.c
399c
Segment *s, *ns;
.
## diffname port/segment.c 1992/0721
## diff -e /n/bootesdump/1992/0711/sys/src/9/port/segment.c /n/bootesdump/1992/0721/sys/src/9/port/segment.c
405c
if((va&KZERO) == KZERO) /* BUG: Only ok for now */
.
## diffname port/segment.c 1992/0822
## diff -e /n/bootesdump/1992/0721/sys/src/9/port/segment.c /n/bootesdump/1992/0822/sys/src/9/port/segment.c
262,263c
if(p->image && p->ref == 0 && p->image != &swapimage && canlock(p)) {
.
## diffname port/segment.c 1992/0824
## diff -e /n/bootesdump/1992/0822/sys/src/9/port/segment.c /n/bootesdump/1992/0824/sys/src/9/port/segment.c
427c
error(Esoverlap);
.
356a
if(newsize > (PTEMAPMEM*SEGMAPSIZE)/BY2PG) {
qunlock(&s->lk);
return -1;
}
.
352,353c
error(Esoverlap);
.
349,350c
if(newtop >= ns->base && newtop < ns->top) {
.
340,344d
324d
322a
/* We may start with the bss overlapping the data */
.
162,163c
n->flushme = s->flushme;
qunlock(&s->lk);
return n;
.
160a
for(i = 0; i < SEGMAPSIZE; i++)
if(pte = s->map[i])
n->map[i] = ptecpy(pte);
.
151,159c
break;
.
135c
break;
.
124c
break;
.
112a
SET(n);
.
111d
108a
int i;
.
103a
}
.
97c
for(p = s->map; p < endpte; p++) {
.
65,67c
if(i && i->s == s && s->ref == 1) {
.
## diffname port/segment.c 1992/0912
## diff -e /n/bootesdump/1992/0824/sys/src/9/port/segment.c /n/bootesdump/1992/0912/sys/src/9/port/segment.c
348c
error(Enovmem);
.
## diffname port/segment.c 1992/1104
## diff -e /n/bootesdump/1992/0912/sys/src/9/port/segment.c /n/bootesdump/1992/1104/sys/src/9/port/segment.c
137a
if(segno == TSEG)
return data2txt(s);
.
112a
s = seg[segno];
.
110c
Segment *n, *s;
.
106c
dupseg(Segment **seg, int segno, int share)
.
## diffname port/segment.c 1992/1206
## diff -e /n/bootesdump/1992/1104/sys/src/9/port/segment.c /n/bootesdump/1992/1206/sys/src/9/port/segment.c
410,411c
if(u->p->seg[sno] == 0 && sno != ESEG)
.
390,391d
386,387d
384a
if(--pages == 0)
return;
j++;
.
374,383c
break;
if(s->map[i] == 0) {
pages -= PTEPERTAB-j;
j = 0;
continue;
}
while(j < PTEPERTAB) {
pg = s->map[i]->pages[j];
if(pg) {
putpage(pg);
s->map[i]->pages[j] = 0;
.
337a
flushmmu();
.
## diffname port/segment.c 1993/0120
## diff -e /n/bootesdump/1992/1206/sys/src/9/port/segment.c /n/bootesdump/1993/0120/sys/src/9/port/segment.c
489,494d
8,9c
Page *lkpage(Segment*, ulong);
.
## diffname port/segment.c 1993/0210
## diff -e /n/bootesdump/1993/0120/sys/src/9/port/segment.c /n/bootesdump/1993/0210/sys/src/9/port/segment.c
444,445d
441,442c
s->pseg = ps;
.
12a
#include "io.h"
.
## diffname port/segment.c 1993/0501
## diff -e /n/bootesdump/1993/0210/sys/src/9/port/segment.c /n/fornaxdump/1993/0501/sys/src/brazil/port/segment.c
485a
}
Page*
snewpage(ulong addr)
{
return newpage(1, 0, addr);
.
472c
for(i = 0; i < MAXMACH; i++)
pg->cachectl[i] |= PG_TXTFLUSH;
.
456c
s = seg(up, arg[0], 1);
.
444a
/* Need some code build mapped devices here */
.
443c
up->seg[sno] = s;
.
421c
ns = up->seg[i];
.
411c
if(up->seg[sno] == 0 && sno != ESEG)
.
343c
ns = up->seg[i];
.
326c
if(seg != BSEG || up->seg[DSEG] == 0 || addr < up->seg[DSEG]->base) {
.
315c
s = up->seg[seg];
.
8,9c
Page *snewpage(ulong addr);
.
## diffname port/segment.c 1993/0507
## diff -e /n/fornaxdump/1993/0501/sys/src/brazil/port/segment.c /n/fornaxdump/1993/0507/sys/src/brazil/port/segment.c
99a
for(i = 0; i < MAXMACH; i++)
(*pg)->cachectl[i] |= PG_DATINVALID;
}
.
98c
if(*pg){
.
89a
int i;
.
## diffname port/segment.c 1993/0725
## diff -e /n/fornaxdump/1993/0507/sys/src/brazil/port/segment.c /n/fornaxdump/1993/0725/sys/src/brazil/port/segment.c
492,497d
488c
.
485,486c
while(len > 0 && j < PTEPERTAB) {
pg = s->map[i]->pages[j];
if(pg != 0)
memset(pg->cachectl, PG_TXTFLUSH, sizeof pg->cachectl);
j++;
len -= BY2PG;
}
j = 0;
.
471,483c
for(i = soff/PTEMAPMEM; len > 0 && i < SEGMAPSIZE; i++) {
if(s->map[i] == 0) {
len -= PTEMAPMEM;
continue;
.
469c
len = arg[1]+BY2PG;
.
457c
int i, j, len;
.
448,449d
441,442c
attr &= ~SG_TYPE; /* Turn off what we are not allowed */
attr |= ps->attr; /* Copy in defaults */
.
407c
if((va&KZERO) == KZERO) /* BUG: Only ok for now */
.
247a
poperror();
.
245a
/* Disaster after commit in exec */
if(waserror()) {
unlock(i);
pexit(Enovmem, 1);
}
.
101,103d
99c
if(*pg)
.
90d
83,84c
qunlock(&s->lk);
free(s);
.
81c
emap = &s->map[SEGMAPSIZE];
for(pp = s->map; pp < emap; pp++)
if(*pp)
freepte(s, *pp);
.
76,79c
qlock(&s->lk);
if(i)
putimage(i);
.
71,74c
s->ref--;
if(s->ref != 0) {
unlock(s);
return;
}
.
69a
else
lock(s);
.
66c
lock(s);
if(i->s == s && s->ref == 1)
.
64c
if(i != 0) {
.
8c
Page *lkpage(Segment*, ulong);
void lkpgfree(Page*);
.
## diffname port/segment.c 1993/0810
## diff -e /n/fornaxdump/1993/0725/sys/src/brazil/port/segment.c /n/fornaxdump/1993/0810/sys/src/brazil/port/segment.c
102,106c
if(*p == 0)
continue;
pte = *p;
for(pg = pte->first; pg <= pte->last; pg++) {
if(x = *pg)
x->va += offset;
.
97,98c
Page **pg, *x;
Pte *pte, **p, **endpte;
.
## diffname port/segment.c 1993/0903
## diff -e /n/fornaxdump/1993/0810/sys/src/brazil/port/segment.c /n/fornaxdump/1993/0903/sys/src/brazil/port/segment.c
478a
print("%s segflush 0x%lux %d\n", up->text, arg[0], arg[1]);
.
## diffname port/segment.c 1993/0904
## diff -e /n/fornaxdump/1993/0903/sys/src/brazil/port/segment.c /n/fornaxdump/1993/0904/sys/src/brazil/port/segment.c
479,480d
## diffname port/segment.c 1993/0919
## diff -e /n/fornaxdump/1993/0904/sys/src/brazil/port/segment.c /n/fornaxdump/1993/0919/sys/src/brazil/port/segment.c
494c
chunk = pe-ps;
len -= chunk;
addr += chunk;
qunlock(&s->lk);
}
.
479,492c
l = len;
if(addr+l > s->top)
l = s->top - addr;
ua = addr-s->base;
ps = ua&(PTEMAPMEM-1);
pe = (ua+l)&(PTEMAPMEM-1);
pe = (pe+BY2PG-1)&~(BY2PG-1);
if(pe > PTEMAPMEM)
pe = PTEMAPMEM;
pteflush(s->map[ua/PTEMAPMEM], ps/BY2PG, pe/BY2PG);
.
475,477c
s->flushme = 1;
.
473c
while(len > 0) {
s = seg(u->p, addr, 1);
if(s == 0)
error(Ebadarg);
.
469,471c
addr = arg[0];
len = arg[1];
.
465,467c
ulong addr, ua, l;
int chunk, ps, pe, len;
.
460a
void
pteflush(Pte *pte, int s, int e)
{
int i;
Page *p;
if(pte == 0)
return;
for(i = s; i < e; i++) {
p = pte->pages[i];
if(p != 0)
memset(p->cachectl, PG_TXTFLUSH, sizeof(p->cachectl));
}
}
.
## diffname port/segment.c 1993/0930
## diff -e /n/fornaxdump/1993/0919/sys/src/brazil/port/segment.c /n/fornaxdump/1993/0930/sys/src/brazil/port/segment.c
488c
s = seg(up, addr, 1);
.
## diffname port/segment.c 1993/1001
## diff -e /n/fornaxdump/1993/0930/sys/src/brazil/port/segment.c /n/fornaxdump/1993/1001/sys/src/brazil/port/segment.c
508a
if(len > 0 && addr < s->top)
goto more;
.
505a
ps = addr-s->base;
pte = s->map[ps/PTEMAPMEM];
ps &= PTEMAPMEM-1;
pe = PTEMAPMEM;
if(pe-ps > l){
pe = ps + l;
pe = (pe+BY2PG-1)&~(BY2PG-1);
}
if(pe == ps) {
qunlock(&s->lk);
error(Ebadarg);
}
if(pte)
pteflush(pte, ps/BY2PG, pe/BY2PG);
.
497,504d
493c
more:
.
481c
ulong addr, l;
Pte *pte;
.
472c
if(pagedout(p) == 0)
.
467,469d
## diffname port/segment.c 1993/1012
## diff -e /n/fornaxdump/1993/1001/sys/src/brazil/port/segment.c /n/fornaxdump/1993/1012/sys/src/brazil/port/segment.c
8,10c
Page* lkpage(Segment*, ulong);
void lkpgfree(Page*);
void imagereclaim(void);
.
## diffname port/segment.c 1994/0514
## diff -e /n/fornaxdump/1993/1012/sys/src/brazil/port/segment.c /n/fornaxdump/1994/0514/sys/src/brazil/port/segment.c
458c
return va;
.
456c
p->seg[sno] = s;
.
441a
va = va&~(BY2PG-1);
if(isoverlap(p, va, len))
error(Esoverlap);
.
432,439c
/* 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;
}
.
430d
424c
if(p->seg[sno] == 0 && sno != ESEG)
.
417c
if(va != 0 && (va&KZERO) == KZERO) /* BUG: Only ok for now */
.
414a
Segment *s;
Physseg *ps;
.
411,413d
407a
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;
}
.
## diffname port/segment.c 1994/0515
## diff -e /n/fornaxdump/1994/0514/sys/src/brazil/port/segment.c /n/fornaxdump/1994/0515/sys/src/brazil/port/segment.c
146c
case SG_DATA: /* Copy on write plus demand load info */
.
135c
case SG_BSS: /* Just copy on write */
.
123c
case SG_TEXT: /* New segment shares pte set */
.
## diffname port/segment.c 1994/0602
## diff -e /n/fornaxdump/1994/0515/sys/src/brazil/port/segment.c /n/fornaxdump/1994/0602/sys/src/brazil/port/segment.c
276,277c
if(p->ref == 0 && p->image && canlock(p)) {
if(p->ref == 0 && p->image != &swapimage)
.
## diffname port/segment.c 1994/0817
## diff -e /n/fornaxdump/1994/0602/sys/src/brazil/port/segment.c /n/fornaxdump/1994/0817/sys/src/brazil/port/segment.c
292c
if(i->notext)
.
277c
if(p->ref == 0)
.
## diffname port/segment.c 1995/0804
## diff -e /n/fornaxdump/1994/0817/sys/src/brazil/port/segment.c /n/fornaxdump/1995/0804/sys/src/brazil/port/segment.c
434d
## diffname port/segment.c 1996/0207
## diff -e /n/fornaxdump/1995/0804/sys/src/brazil/port/segment.c /n/fornaxdump/1996/0207/sys/src/brazil/port/segment.c
229c
sched();
.
## diffname port/segment.c 1996/0303
## diff -e /n/fornaxdump/1996/0207/sys/src/brazil/port/segment.c /n/fornaxdump/1996/0303/sys/src/brazil/port/segment.c
543a
}
void
segclock(ulong pc)
{
Segment *s;
s = up->seg[TSEG];
if(s == 0 || s->profile == 0)
return;
s->profile[0] += TK2MS(1);
if(pc >= s->base && pc < s->top) {
pc -= s->base;
s->profile[pc>>LRESPROF] += TK2MS(1);
}
.
90a
if(s->profile != 0)
free(s->profile);
.
## diffname port/segment.c 1996/0528
## diff -e /n/fornaxdump/1996/0303/sys/src/brazil/port/segment.c /n/fornaxdump/1996/0528/sys/src/brazil/port/segment.c
317d
314a
/* defer freeing channel till we're out of spin lock's */
if(imagealloc.nfreechan == imagealloc.szfreechan){
imagealloc.szfreechan += NFREECHAN;
cp = malloc(imagealloc.szfreechan*sizeof(Chan*));
if(cp == nil)
panic("putimage");
memmove(cp, imagealloc.freechan, imagealloc.nfreechan*sizeof(Chan*));
free(imagealloc.freechan);
imagealloc.freechan = cp;
}
imagealloc.freechan[imagealloc.nfreechan++] = c;
.
291a
/* Somebody is already cleaning the image chans */
if(!canqlock(&imagealloc.fcreclaim))
return;
while(imagealloc.nfreechan > 0){
lock(&imagealloc);
imagealloc.nfreechan--;
c = imagealloc.freechan[imagealloc.nfreechan];
unlock(&imagealloc);
close(c);
}
qunlock(&imagealloc.fcreclaim);
}
void
putimage(Image *i)
{
Chan *c, **cp;
.
289c
imagechanreclaim(void)
.
287a
/*
* since close can block, this has to be called outside of
* spin locks.
*/
.
203a
/* reclaim any free channels from reclaimed segments */
if(imagealloc.nfreechan)
imagechanreclaim();
.
35a
imagealloc.freechan = malloc(NFREECHAN * sizeof(Chan*));
imagealloc.szfreechan = NFREECHAN;
.
23c
QLock ireclaim; /* mutex on reclaiming free images */
Chan **freechan; /* free image channels */
int nfreechan; /* number of free channels */
int szfreechan; /* size of freechan array */
QLock fcreclaim; /* mutex on reclaiming free channels */
.
15a
#define NFREECHAN 64
.
10a
void imagechanreclaim(void);
.
## diffname port/segment.c 1997/0327
## diff -e /n/fornaxdump/1996/0528/sys/src/brazil/port/segment.c /n/emeliedump/1997/0327/sys/src/brazil/port/segment.c
319c
cclose(c);
.
## diffname port/segment.c 1997/0516
## diff -e /n/emeliedump/1997/0327/sys/src/brazil/port/segment.c /n/emeliedump/1997/0516/sys/src/brazil/port/segment.c
146a
case SG_MAP:
.
## diffname port/segment.c 1998/0326
## diff -e /n/emeliedump/1997/0516/sys/src/brazil/port/segment.c /n/emeliedump/1998/0326/sys/src/brazil/port/segment.c
474a
return 0;
}
int
addphysseg(Physseg* new)
{
Physseg *ps;
/*
* Check not already entered and there is room
* for a new entry and the terminating null entry.
*/
lock(&physseglock);
for(ps = physseg; ps->name; ps++){
if(strcmp(ps->name, new->name) == 0){
unlock(&physseglock);
return -1;
}
}
if(ps-physseg >= nelem(physseg)-2){
unlock(&physseglock);
return -1;
}
*ps = *new;
unlock(&physseglock);
.
306c
static void
.
281c
static void
.
20c
static struct
.
16a
static Lock physseglock;
.
8,11c
static void imagereclaim(void);
static void imagechanreclaim(void);
.
## diffname port/segment.c 1998/0512
## diff -e /n/emeliedump/1998/0326/sys/src/brazil/port/segment.c /n/emeliedump/1998/0512/sys/src/brazil/port/segment.c
470c
continue;
.
449c
s->map[i]->pages[j] = 0;
.
438c
if(pages <= 0)
.
396c
.
341c
.
338c
i->qid = (Qid){~0, ~0};
.
237c
.
221,222c
* Search the image cache for remains of the text from a previous
* or currently running incarnation
.
183c
return n;
.
## diffname port/segment.c 1998/0724
## diff -e /n/emeliedump/1998/0512/sys/src/brazil/port/segment.c /n/emeliedump/1998/0724/sys/src/brazil/port/segment.c
455a
}
out:
/* wait for others to get fix their tlb's and then free the pages */
if((s->type&SG_TYPE) == SG_SHARED){
}
for(pg = list; pg != nil; pg = list){
list = list->next;
putpage(pg);
.
452c
goto out;
.
450c
pg->next = list;
list = pg;
.
447,448c
if(pg)
.
436a
list = nil;
.
432a
Page *list;
.
426a
/*
* called with s->lk locked
*/
.
## diffname port/segment.c 1998/0725
## diff -e /n/emeliedump/1998/0724/sys/src/brazil/port/segment.c /n/emeliedump/1998/0725/sys/src/brazil/port/segment.c
465a
/* free the pages */
.
463,464c
/* flush this seg in all other processes */
i = s->type&SG_TYPE;
switch(i){
case SG_SHARED:
case SG_SHDATA:
procflushseg(s);
break;
.
## diffname port/segment.c 1998/0823
## diff -e /n/emeliedump/1998/0725/sys/src/brazil/port/segment.c /n/emeliedump/1998/0823/sys/src/brazil/port/segment.c
454,455c
pg->next = list;
list = pg;
}
.
452c
if(pg){
.
## diffname port/segment.c 1998/0916
## diff -e /n/emeliedump/1998/0823/sys/src/brazil/port/segment.c /n/emeliedump/1998/0916/sys/src/brazil/port/segment.c
571c
attr &= ~SG_TYPE; /* Turn off what is not allowed */
.
559c
if(isoverlap(p, va, len) != nil)
.
553a
va = os->base;
if(len > va)
error(Enovmem);
.
551,552c
for(;;) {
os = isoverlap(p, va, len);
if(os == nil)
.
548c
/*
* Find a hole in the address space.
* Starting at the lowest possible stack address - len,
* check for an overlapping segment, and repeat at the
* base of that segment - len until either a hole is found
* or the address space is exhausted.
*/
.
540c
if(p->seg[sno] == nil && sno != ESEG)
.
529,530c
int sno;
Segment *s, *os;
.
496c
return nil;
.
494c
return ns;
.
480c
Segment*
.
442c
for(i = soff/PTEMAPMEM; i < size; i++) {
.
440a
size = s->mapsize;
.
433c
int i, j, size;
.
419a
mapsize = ROUND(newsize, PTEPERTAB)/PTEPERTAB;
if(mapsize > s->mapsize){
map = smalloc(mapsize*sizeof(Pte*));
memmove(map, s->map, s->mapsize);
if(s->map != s->ssegmap)
free(s->map);
s->map = map;
s->mapsize = mapsize;
}
.
416c
if(newsize > (SEGMAPSIZE*PTEPERTAB)) {
.
377c
int i, mapsize;
Pte **map;
.
177c
size = s->mapsize;
for(i = 0; i < size; i++)
.
126c
int i, size;
.
111c
endpte = &s->map[s->mapsize];
.
99a
if(s->map != s->ssegmap)
free(s->map);
.
94c
emap = &s->map[s->mapsize];
.
60a
mapsize = ROUND(size, PTEPERTAB)/PTEPERTAB;
if(mapsize > nelem(s->ssegmap)){
s->map = smalloc(mapsize*sizeof(Pte*));
s->mapsize = mapsize;
}
else{
s->map = s->ssegmap;
s->mapsize = nelem(s->ssegmap);
}
.
50a
int mapsize;
.
## diffname port/segment.c 1998/0919
## diff -e /n/emeliedump/1998/0916/sys/src/brazil/port/segment.c /n/emeliedump/1998/0919/sys/src/brazil/port/segment.c
439c
memmove(map, s->map, s->mapsize*sizeof(Pte*));
.
64a
mapsize *= 2;
if(mapsize > (SEGMAPSIZE*PTEPERTAB))
mapsize = (SEGMAPSIZE*PTEPERTAB);
.
## diffname port/segment.c 1998/1107
## diff -e /n/emeliedump/1998/0919/sys/src/brazil/port/segment.c /n/emeliedump/1998/1107/sys/src/brazil/port/segment.c
316a
irstats.loops++;
irstats.ticks += ticks;
if(ticks > irstats.maxt)
irstats.maxt = ticks;
//print("T%llud+", ticks);
.
315a
ticks = fastticks(nil) - ticks;
.
308a
ticks = fastticks(nil);
.
303a
irstats.calls++;
.
302a
uvlong ticks;
.
298a
static struct {
int calls; /* times imagereclaim was called */
int loops; /* times the main loop was run */
uvlong ticks; /* total time in the main loop */
uvlong maxt; /* longest time in main loop */
} irstats;
.
## diffname port/segment.c 1999/0120
## diff -e /n/emeliedump/1998/1107/sys/src/brazil/port/segment.c /n/emeliedump/1999/0120/sys/src/brazil/port/segment.c
438a
}
if(swapfull()){
qunlock(&s->lk);
error(Enoswap);
.
186a
poperror();
.
185a
if(waserror()){
qunlock(&s->lk);
nexterror();
}
.
172a
poperror();
.
171a
if(waserror()){
qunlock(&s->lk);
nexterror();
}
.
160a
poperror();
.
159a
if(waserror()){
qunlock(&s->lk);
nexterror();
}
.
55a
if(swapfull())
error(Enoswap);
.
## diffname port/segment.c 1999/1007
## diff -e /n/emeliedump/1999/0120/sys/src/brazil/port/segment.c /n/emeliedump/1999/1007/sys/src/brazil/port/segment.c
614a
if(len == 0)
error(Ebadarg);
.
## diffname port/segment.c 2000/0229
## diff -e /n/emeliedump/1999/1007/sys/src/brazil/port/segment.c /n/emeliedump/2000/0229/sys/src/9/port/segment.c
366a
/*
* We don't have to recheck that nfreechan > 0 after we
* acquire the lock, because we're the only ones who decrement
* it (the other lock contender increments it), and there's only
* one of us thanks to the qlock above.
*/
.
## diffname port/segment.c 2000/0714
## diff -e /n/emeliedump/2000/0229/sys/src/9/port/segment.c /n/emeliedump/2000/0714/sys/src/9/port/segment.c
20c
static struct Imagealloc
.
## diffname port/segment.c 2000/1012
## diff -e /n/emeliedump/2000/0714/sys/src/9/port/segment.c /n/emeliedump/2000/1012/sys/src/9/port/segment.c
58d
## diffname port/segment.c 2001/0314
## diff -e /n/emeliedump/2000/1012/sys/src/9/port/segment.c /n/emeliedump/2001/0314/sys/src/9/port/segment.c
218a
sameseg:
incref(s);
poperror();
qunlock(&s->lk);
return s;
.
216a
poperror();
.
203d
198,201d
194,196c
goto sameseg;
.
191,192c
if(share) {
if(s->ref != 1)
print("Fuckin A again cap'n!\n");
.
189a
}
.
188c
if(segno == TSEG){
poperror();
qunlock(&s->lk);
.
184d
179,182d
175,177c
goto sameseg;
.
172,173c
if(share) {
if(s->ref != 1)
print("Fuckin A cap'n!\n");
.
167d
161,165d
157,158c
goto sameseg;
.
151a
qlock(&s->lk);
if(waserror()){
qunlock(&s->lk);
nexterror();
}
.
## diffname port/segment.c 2001/0424
## diff -e /n/emeliedump/2001/0314/sys/src/9/port/segment.c /n/emeliedump/2001/0424/sys/src/9/port/segment.c
539,540d
534,537c
if(s->ref > 1)
.
205a
if(s->ref > 1)
procflushseg(s);
.
191d
186,189c
if(share)
.
175d
169,173c
if(share)
.
161d
## diffname port/segment.c 2001/0503
## diff -e /n/emeliedump/2001/0424/sys/src/9/port/segment.c /n/emeliedump/2001/0503/sys/src/9/port/segment.c
13c
/*
* Attachable segment types
*/
static Physseg physseg[10] = {
{ SG_SHARED, "shared", 0, SEGMAXSIZE, 0, 0 },
{ SG_BSS, "memory", 0, SEGMAXSIZE, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
};
.
11d
## diffname port/segment.c 2001/0507
## diff -e /n/emeliedump/2001/0503/sys/src/9/port/segment.c /n/emeliedump/2001/0507/sys/src/9/port/segment.c
607a
/*
* first look for a global segment with the
* same name
*/
if(_globalsegattach != nil){
s = (*_globalsegattach)(p, name);
if(s != nil){
p->seg[sno] = s;
return s->base;
}
}
.
588a
int
isphysseg(char *name)
{
Physseg *ps;
int rv = 0;
lock(&physseglock);
for(ps = physseg; ps->name; ps++){
if(strcmp(ps->name, name) == 0){
rv = 1;
break;
}
}
unlock(&physseglock);
return rv;
}
Segment* (*_globalsegattach)(Proc*, char*);
.
## diffname port/segment.c 2001/0508
## diff -e /n/emeliedump/2001/0507/sys/src/9/port/segment.c /n/emeliedump/2001/0508/sys/src/9/port/segment.c
706c
int chunk, len;
.
704c
ulong addr, l, ps, pe;
.
665c
len = top - va;
if(isoverlap(p, va, top) != nil)
.
663a
top = PGROUND(va + len);
.
654c
os = isoverlap(p, va, va+len);
.
651a
len = PGROUND(len);
.
640d
629c
* first look for a global segment with the
.
611a
ulong top;
.
550d
548d
544c
isoverlap(Proc *p, ulong va, int newtop)
.
## diffname port/segment.c 2001/0527
## diff -e /n/emeliedump/2001/0508/sys/src/9/port/segment.c /n/emeliedump/2001/0527/sys/src/9/port/segment.c
707c
int chunk, ps, pe, len;
.
705c
ulong addr, l;
.
665,666c
if(isoverlap(p, va, len) != nil)
.
663d
653c
os = isoverlap(p, va, len);
.
650d
627,638c
len = PGROUND(len);
.
610d
587,605d
548a
newtop = va+len;
.
547a
ulong newtop;
.
544c
isoverlap(Proc *p, ulong va, int len)
.
390c
mkqid(&i->qid, ~0, ~0, QTFILE);
.
## diffname port/segment.c 2002/0329
## diff -e /n/emeliedump/2001/0527/sys/src/9/port/segment.c /n/emeliedump/2002/0329/sys/src/9/port/segment.c
127a
unlock(s); /* keep lock/unlocks balanced */
.
## diffname port/segment.c 2002/0330
## diff -e /n/emeliedump/2002/0329/sys/src/9/port/segment.c /n/emeliedump/2002/0330/sys/src/9/port/segment.c
608a
/*
* first look for a global segment with the
* same name
*/
if(_globalsegattach != nil){
s = (*_globalsegattach)(p, name);
if(s != nil){
p->seg[sno] = s;
return s->base;
}
}
.
589a
int
isphysseg(char *name)
{
Physseg *ps;
int rv = 0;
lock(&physseglock);
for(ps = physseg; ps->name; ps++){
if(strcmp(ps->name, name) == 0){
rv = 1;
break;
}
}
unlock(&physseglock);
return rv;
}
.
39a
Segment* (*_globalsegattach)(Proc*, char*);
.
## diffname port/segment.c 2002/0420
## diff -e /n/emeliedump/2002/0330/sys/src/9/port/segment.c /n/emeliedump/2002/0420/sys/src/9/port/segment.c
130d
114a
unlock(s);
.
## diffname port/segment.c 2002/0924
## diff -e /n/emeliedump/2002/0420/sys/src/9/port/segment.c /n/emeliedump/2002/0924/sys/src/9/port/segment.c
525,526d
523a
if(onswap(pg))
putswap(pg);
else{
pg->next = list;
list = pg;
}
.
522a
/*
* We want to zero s->map[i]->page[j] and putpage(pg),
* but we have to make sure other processors flush the entry
* entry from their TLBs before the page is freed.
* We construct a list of the pages to be freed, zero
* the entries, then (below) call procflushseg, and call
* putpage on the whole list.
*
* Swapped-out pages don't appear in TLBs, so it's okay
* to putswap those pages before procflushseg.
*/
.
|
