diff options
Diffstat (limited to 'xorg-server/Xext/shm.c')
| -rw-r--r-- | xorg-server/Xext/shm.c | 2688 |
1 files changed, 1344 insertions, 1344 deletions
diff --git a/xorg-server/Xext/shm.c b/xorg-server/Xext/shm.c index 62d6ebe0c..ac1ab3b56 100644 --- a/xorg-server/Xext/shm.c +++ b/xorg-server/Xext/shm.c @@ -1,1344 +1,1344 @@ -/************************************************************
-
-Copyright 1989, 1998 The Open Group
-
-Permission to use, copy, modify, distribute, and sell this software and its
-documentation for any purpose is hereby granted without fee, provided that
-the above copyright notice appear in all copies and that both that
-copyright notice and this permission notice appear in supporting
-documentation.
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
-AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-Except as contained in this notice, the name of The Open Group shall not be
-used in advertising or otherwise to promote the sale, use or other dealings
-in this Software without prior written authorization from The Open Group.
-
-********************************************************/
-
-/* THIS IS NOT AN X CONSORTIUM STANDARD OR AN X PROJECT TEAM SPECIFICATION */
-
-
-#define SHM
-
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
-#include <sys/types.h>
-#if !defined(_MSC_VER)
-#include <sys/ipc.h>
-#include <sys/shm.h>
-#endif
-#include <unistd.h>
-#include <sys/stat.h>
-#include <X11/X.h>
-#include <X11/Xproto.h>
-#include "misc.h"
-#include "os.h"
-#include "dixstruct.h"
-#include "resource.h"
-#include "scrnintstr.h"
-#include "windowstr.h"
-#include "pixmapstr.h"
-#include "gcstruct.h"
-#include "extnsionst.h"
-#include "servermd.h"
-#include "shmint.h"
-#include "xace.h"
-#include <X11/extensions/shmproto.h>
-#include <X11/Xfuncproto.h>
-#include "protocol-versions.h"
-
-/* Needed for Solaris cross-zone shared memory extension */
-#ifdef HAVE_SHMCTL64
-#include <sys/ipc_impl.h>
-#define SHMSTAT(id, buf) shmctl64(id, IPC_STAT64, buf)
-#define SHMSTAT_TYPE struct shmid_ds64
-#define SHMPERM_TYPE struct ipc_perm64
-#define SHM_PERM(buf) buf.shmx_perm
-#define SHM_SEGSZ(buf) buf.shmx_segsz
-#define SHMPERM_UID(p) p->ipcx_uid
-#define SHMPERM_CUID(p) p->ipcx_cuid
-#define SHMPERM_GID(p) p->ipcx_gid
-#define SHMPERM_CGID(p) p->ipcx_cgid
-#define SHMPERM_MODE(p) p->ipcx_mode
-#define SHMPERM_ZONEID(p) p->ipcx_zoneid
-#else
-#define SHMSTAT(id, buf) shmctl(id, IPC_STAT, buf)
-#define SHMSTAT_TYPE struct shmid_ds
-#define SHMPERM_TYPE struct ipc_perm
-#define SHM_PERM(buf) buf.shm_perm
-#define SHM_SEGSZ(buf) buf.shm_segsz
-#define SHMPERM_UID(p) p->uid
-#define SHMPERM_CUID(p) p->cuid
-#define SHMPERM_GID(p) p->gid
-#define SHMPERM_CGID(p) p->cgid
-#define SHMPERM_MODE(p) p->mode
-#endif
-
-#ifdef PANORAMIX
-#include "panoramiX.h"
-#include "panoramiXsrv.h"
-#endif
-
-#include "modinit.h"
-
-typedef struct _ShmDesc {
- struct _ShmDesc *next;
- int shmid;
- int refcnt;
- char *addr;
- Bool writable;
- unsigned long size;
-} ShmDescRec, *ShmDescPtr;
-
-typedef struct _ShmScrPrivateRec {
- CloseScreenProcPtr CloseScreen;
- ShmFuncsPtr shmFuncs;
- DestroyPixmapProcPtr destroyPixmap;
-} ShmScrPrivateRec;
-
-static PixmapPtr fbShmCreatePixmap(XSHM_CREATE_PIXMAP_ARGS);
-static int ShmDetachSegment(
- pointer /* value */,
- XID /* shmseg */
- );
-static void ShmResetProc(
- ExtensionEntry * /* extEntry */
- );
-static void SShmCompletionEvent(
- xShmCompletionEvent * /* from */,
- xShmCompletionEvent * /* to */
- );
-
-static Bool ShmDestroyPixmap (PixmapPtr pPixmap);
-
-
-static unsigned char ShmReqCode;
-int ShmCompletionCode;
-int BadShmSegCode;
-RESTYPE ShmSegType;
-static ShmDescPtr Shmsegs;
-static Bool sharedPixmaps;
-static DevPrivateKeyRec shmScrPrivateKeyRec;
-#define shmScrPrivateKey (&shmScrPrivateKeyRec)
-static DevPrivateKeyRec shmPixmapPrivateKeyRec;
-#define shmPixmapPrivateKey (&shmPixmapPrivateKeyRec)
-static ShmFuncs miFuncs = {NULL, NULL};
-static ShmFuncs fbFuncs = {fbShmCreatePixmap, NULL};
-
-#define ShmGetScreenPriv(s) ((ShmScrPrivateRec *)dixLookupPrivate(&(s)->devPrivates, shmScrPrivateKey))
-
-#define VERIFY_SHMSEG(shmseg,shmdesc,client) \
-{ \
- int rc; \
- rc = dixLookupResourceByType((pointer *)&(shmdesc), shmseg, ShmSegType, \
- client, DixReadAccess); \
- if (rc != Success) \
- return rc; \
-}
-
-#define VERIFY_SHMPTR(shmseg,offset,needwrite,shmdesc,client) \
-{ \
- VERIFY_SHMSEG(shmseg, shmdesc, client); \
- if ((offset & 3) || (offset > shmdesc->size)) \
- { \
- client->errorValue = offset; \
- return BadValue; \
- } \
- if (needwrite && !shmdesc->writable) \
- return BadAccess; \
-}
-
-#define VERIFY_SHMSIZE(shmdesc,offset,len,client) \
-{ \
- if ((offset + len) > shmdesc->size) \
- { \
- return BadAccess; \
- } \
-}
-
-
-#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__CYGWIN__) || defined(__DragonFly__)
-#include <sys/signal.h>
-
-static Bool badSysCall = FALSE;
-
-static void
-SigSysHandler(int signo)
-{
- badSysCall = TRUE;
-}
-
-static Bool CheckForShmSyscall(void)
-{
- void (*oldHandler)();
- int shmid = -1;
-
- /* If no SHM support in the kernel, the bad syscall will generate SIGSYS */
- oldHandler = signal(SIGSYS, SigSysHandler);
-
- badSysCall = FALSE;
- shmid = shmget(IPC_PRIVATE, 4096, IPC_CREAT);
-
- if (shmid != -1)
- {
- /* Successful allocation - clean up */
- shmctl(shmid, IPC_RMID, NULL);
- }
- else
- {
- /* Allocation failed */
- badSysCall = TRUE;
- }
- signal(SIGSYS, oldHandler);
- return !badSysCall;
-}
-
-#define MUST_CHECK_FOR_SHM_SYSCALL
-
-#endif
-
-static Bool
-ShmCloseScreen(int i, ScreenPtr pScreen)
-{
- ShmScrPrivateRec *screen_priv = ShmGetScreenPriv(pScreen);
- pScreen->CloseScreen = screen_priv->CloseScreen;
- dixSetPrivate(&pScreen->devPrivates, shmScrPrivateKey, NULL);
- free(screen_priv);
- return (*pScreen->CloseScreen) (i, pScreen);
-}
-
-static ShmScrPrivateRec *
-ShmInitScreenPriv(ScreenPtr pScreen)
-{
- ShmScrPrivateRec *screen_priv = ShmGetScreenPriv(pScreen);
- if (!screen_priv)
- {
- screen_priv = calloc(1, sizeof (ShmScrPrivateRec));
- screen_priv->CloseScreen = pScreen->CloseScreen;
- dixSetPrivate(&pScreen->devPrivates, shmScrPrivateKey, screen_priv);
- pScreen->CloseScreen = ShmCloseScreen;
- }
- return screen_priv;
-}
-
-static Bool
-ShmRegisterPrivates(void)
-{
- if (!dixRegisterPrivateKey(&shmScrPrivateKeyRec, PRIVATE_SCREEN, 0))
- return FALSE;
- if (!dixRegisterPrivateKey(&shmPixmapPrivateKeyRec, PRIVATE_PIXMAP, 0))
- return FALSE;
- return TRUE;
-}
-
-/*ARGSUSED*/
-static void
-ShmResetProc(ExtensionEntry *extEntry)
-{
- int i;
- for (i = 0; i < screenInfo.numScreens; i++)
- ShmRegisterFuncs(screenInfo.screens[i], NULL);
-}
-
-void
-ShmRegisterFuncs(ScreenPtr pScreen, ShmFuncsPtr funcs)
-{
- if (!ShmRegisterPrivates())
- return;
- ShmInitScreenPriv(pScreen)->shmFuncs = funcs;
-}
-
-static Bool
-ShmDestroyPixmap (PixmapPtr pPixmap)
-{
- ScreenPtr pScreen = pPixmap->drawable.pScreen;
- ShmScrPrivateRec *screen_priv = ShmGetScreenPriv(pScreen);
- Bool ret;
- if (pPixmap->refcnt == 1)
- {
- ShmDescPtr shmdesc;
- shmdesc = (ShmDescPtr)dixLookupPrivate(&pPixmap->devPrivates,
- shmPixmapPrivateKey);
- if (shmdesc)
- ShmDetachSegment ((pointer) shmdesc, pPixmap->drawable.id);
- }
-
- pScreen->DestroyPixmap = screen_priv->destroyPixmap;
- ret = (*pScreen->DestroyPixmap) (pPixmap);
- screen_priv->destroyPixmap = pScreen->DestroyPixmap;
- pScreen->DestroyPixmap = ShmDestroyPixmap;
- return ret;
-}
-
-void
-ShmRegisterFbFuncs(ScreenPtr pScreen)
-{
- ShmRegisterFuncs(pScreen, &fbFuncs);
-}
-
-static int
-ProcShmQueryVersion(ClientPtr client)
-{
- xShmQueryVersionReply rep;
- int n;
-
- REQUEST_SIZE_MATCH(xShmQueryVersionReq);
- memset(&rep, 0, sizeof(xShmQueryVersionReply));
- rep.type = X_Reply;
- rep.length = 0;
- rep.sequenceNumber = client->sequence;
- rep.sharedPixmaps = sharedPixmaps;
- rep.pixmapFormat = sharedPixmaps ? ZPixmap : 0;
- rep.majorVersion = SERVER_SHM_MAJOR_VERSION;
- rep.minorVersion = SERVER_SHM_MINOR_VERSION;
-#ifndef _MSC_VER
- rep.uid = geteuid();
- rep.gid = getegid();
-#endif
- if (client->swapped) {
- swaps(&rep.sequenceNumber, n);
- swapl(&rep.length, n);
- swaps(&rep.majorVersion, n);
- swaps(&rep.minorVersion, n);
- swaps(&rep.uid, n);
- swaps(&rep.gid, n);
- }
- WriteToClient(client, sizeof(xShmQueryVersionReply), (char *)&rep);
- return Success;
-}
-
-/*
- * Simulate the access() system call for a shared memory segement,
- * using the credentials from the client if available
- */
-static int
-shm_access(ClientPtr client, SHMPERM_TYPE *perm, int readonly)
-{
- int uid, gid;
- mode_t mask;
- int uidset = 0, gidset = 0;
- LocalClientCredRec *lcc;
-
- if (GetLocalClientCreds(client, &lcc) != -1) {
-
- if (lcc->fieldsSet & LCC_UID_SET) {
- uid = lcc->euid;
- uidset = 1;
- }
- if (lcc->fieldsSet & LCC_GID_SET) {
- gid = lcc->egid;
- gidset = 1;
- }
-
-#if defined(HAVE_GETZONEID) && defined(SHMPERM_ZONEID)
- if ( ((lcc->fieldsSet & LCC_ZID_SET) == 0) || (lcc->zoneid == -1)
- || (lcc->zoneid != SHMPERM_ZONEID(perm))) {
- uidset = 0;
- gidset = 0;
- }
-#endif
- FreeLocalClientCreds(lcc);
-
- if (uidset) {
- /* User id 0 always gets access */
- if (uid == 0) {
- return 0;
- }
- #ifdef _MSC_VER
- __asm int 3;
- #else
- /* Check the owner */
- if (SHMPERM_UID(perm) == uid || SHMPERM_CUID(perm) == uid) {
- mask = S_IRUSR;
- if (!readonly) {
- mask |= S_IWUSR;
- }
- return (SHMPERM_MODE(perm) & mask) == mask ? 0 : -1;
- }
- #endif
- }
-
- if (gidset) {
- /* Check the group */
- #ifdef _MSC_VER
- __asm int 3;
- #else
- if (SHMPERM_GID(perm) == gid || SHMPERM_CGID(perm) == gid) {
- mask = S_IRGRP;
- if (!readonly) {
- mask |= S_IWGRP;
- }
- return (SHMPERM_MODE(perm) & mask) == mask ? 0 : -1;
- }
- #endif
- }
- }
- #ifdef _MSC_VER
- __asm int 3;
- return -1;
- #else
- /* Otherwise, check everyone else */
- mask = S_IROTH;
- if (!readonly) {
- mask |= S_IWOTH;
- }
- return (SHMPERM_MODE(perm) & mask) == mask ? 0 : -1;
- #endif
-}
-
-static int
-ProcShmAttach(ClientPtr client)
-{
- SHMSTAT_TYPE buf;
- ShmDescPtr shmdesc;
- REQUEST(xShmAttachReq);
-
- REQUEST_SIZE_MATCH(xShmAttachReq);
- LEGAL_NEW_RESOURCE(stuff->shmseg, client);
- if ((stuff->readOnly != xTrue) && (stuff->readOnly != xFalse))
- {
- client->errorValue = stuff->readOnly;
- return BadValue;
- }
- for (shmdesc = Shmsegs;
- shmdesc && (shmdesc->shmid != stuff->shmid);
- shmdesc = shmdesc->next)
- ;
- if (shmdesc)
- {
- if (!stuff->readOnly && !shmdesc->writable)
- return BadAccess;
- shmdesc->refcnt++;
- }
- else
- {
- shmdesc = malloc(sizeof(ShmDescRec));
- if (!shmdesc)
- return BadAlloc;
- shmdesc->addr = shmat(stuff->shmid, 0,
- stuff->readOnly ? SHM_RDONLY : 0);
- if ((shmdesc->addr == ((char *)-1)) ||
- SHMSTAT(stuff->shmid, &buf))
- {
- free(shmdesc);
- return BadAccess;
- }
-
- /* The attach was performed with root privs. We must
- * do manual checking of access rights for the credentials
- * of the client */
-
- if (shm_access(client, &(SHM_PERM(buf)), stuff->readOnly) == -1) {
- shmdt(shmdesc->addr);
- free(shmdesc);
- return BadAccess;
- }
-
- shmdesc->shmid = stuff->shmid;
- shmdesc->refcnt = 1;
- shmdesc->writable = !stuff->readOnly;
- shmdesc->size = SHM_SEGSZ(buf);
- shmdesc->next = Shmsegs;
- Shmsegs = shmdesc;
- }
- if (!AddResource(stuff->shmseg, ShmSegType, (pointer)shmdesc))
- return BadAlloc;
- return Success;
-}
-
-/*ARGSUSED*/
-static int
-ShmDetachSegment(pointer value, /* must conform to DeleteType */
- XID shmseg)
-{
- ShmDescPtr shmdesc = (ShmDescPtr)value;
- ShmDescPtr *prev;
-
- if (--shmdesc->refcnt)
- return TRUE;
-#ifndef _MSC_VER
- shmdt(shmdesc->addr);
-#endif
- for (prev = &Shmsegs; *prev != shmdesc; prev = &(*prev)->next)
- ;
- *prev = shmdesc->next;
- free(shmdesc);
- return Success;
-}
-
-static int
-ProcShmDetach(ClientPtr client)
-{
- ShmDescPtr shmdesc;
- REQUEST(xShmDetachReq);
-
- REQUEST_SIZE_MATCH(xShmDetachReq);
- VERIFY_SHMSEG(stuff->shmseg, shmdesc, client);
- FreeResource(stuff->shmseg, RT_NONE);
- return Success;
-}
-
-/*
- * If the given request doesn't exactly match PutImage's constraints,
- * wrap the image in a scratch pixmap header and let CopyArea sort it out.
- */
-static void
-doShmPutImage(DrawablePtr dst, GCPtr pGC,
- int depth, unsigned int format,
- int w, int h, int sx, int sy, int sw, int sh, int dx, int dy,
- char *data)
-{
- PixmapPtr pPixmap;
-
- if (format == ZPixmap || depth == 1) {
- pPixmap = GetScratchPixmapHeader(dst->pScreen, w, h, depth,
- BitsPerPixel(depth),
- PixmapBytePad(w, depth),
- data);
- if (!pPixmap)
- return;
- pGC->ops->CopyArea((DrawablePtr)pPixmap, dst, pGC, sx, sy, sw, sh, dx, dy);
- FreeScratchPixmapHeader(pPixmap);
- } else {
- GCPtr putGC = GetScratchGC(depth, dst->pScreen);
-
- if (!putGC)
- return;
-
- pPixmap = (*dst->pScreen->CreatePixmap)(dst->pScreen, sw, sh, depth,
- CREATE_PIXMAP_USAGE_SCRATCH);
- if (!pPixmap) {
- FreeScratchGC(putGC);
- return;
- }
- ValidateGC(&pPixmap->drawable, putGC);
- (*putGC->ops->PutImage)(&pPixmap->drawable, putGC, depth, -sx, -sy, w, h, 0,
- (format == XYPixmap) ? XYPixmap : ZPixmap, data);
- FreeScratchGC(putGC);
- if (format == XYBitmap)
- (void)(*pGC->ops->CopyPlane)(&pPixmap->drawable, dst, pGC, 0, 0, sw, sh,
- dx, dy, 1L);
- else
- (void)(*pGC->ops->CopyArea)(&pPixmap->drawable, dst, pGC, 0, 0, sw, sh,
- dx, dy);
- (*pPixmap->drawable.pScreen->DestroyPixmap)(pPixmap);
- }
-}
-
-static int
-ProcShmPutImage(ClientPtr client)
-{
- GCPtr pGC;
- DrawablePtr pDraw;
- long length;
- ShmDescPtr shmdesc;
- REQUEST(xShmPutImageReq);
-
- REQUEST_SIZE_MATCH(xShmPutImageReq);
- VALIDATE_DRAWABLE_AND_GC(stuff->drawable, pDraw, DixWriteAccess);
- VERIFY_SHMPTR(stuff->shmseg, stuff->offset, FALSE, shmdesc, client);
- if ((stuff->sendEvent != xTrue) && (stuff->sendEvent != xFalse))
- return BadValue;
- if (stuff->format == XYBitmap)
- {
- if (stuff->depth != 1)
- return BadMatch;
- length = PixmapBytePad(stuff->totalWidth, 1);
- }
- else if (stuff->format == XYPixmap)
- {
- if (pDraw->depth != stuff->depth)
- return BadMatch;
- length = PixmapBytePad(stuff->totalWidth, 1);
- length *= stuff->depth;
- }
- else if (stuff->format == ZPixmap)
- {
- if (pDraw->depth != stuff->depth)
- return BadMatch;
- length = PixmapBytePad(stuff->totalWidth, stuff->depth);
- }
- else
- {
- client->errorValue = stuff->format;
- return BadValue;
- }
-
- /*
- * There's a potential integer overflow in this check:
- * VERIFY_SHMSIZE(shmdesc, stuff->offset, length * stuff->totalHeight,
- * client);
- * the version below ought to avoid it
- */
- if (stuff->totalHeight != 0 &&
- length > (shmdesc->size - stuff->offset)/stuff->totalHeight) {
- client->errorValue = stuff->totalWidth;
- return BadValue;
- }
- if (stuff->srcX > stuff->totalWidth)
- {
- client->errorValue = stuff->srcX;
- return BadValue;
- }
- if (stuff->srcY > stuff->totalHeight)
- {
- client->errorValue = stuff->srcY;
- return BadValue;
- }
- if ((stuff->srcX + stuff->srcWidth) > stuff->totalWidth)
- {
- client->errorValue = stuff->srcWidth;
- return BadValue;
- }
- if ((stuff->srcY + stuff->srcHeight) > stuff->totalHeight)
- {
- client->errorValue = stuff->srcHeight;
- return BadValue;
- }
-
- if ((((stuff->format == ZPixmap) && (stuff->srcX == 0)) ||
- ((stuff->format != ZPixmap) &&
- (stuff->srcX < screenInfo.bitmapScanlinePad) &&
- ((stuff->format == XYBitmap) ||
- ((stuff->srcY == 0) &&
- (stuff->srcHeight == stuff->totalHeight))))) &&
- ((stuff->srcX + stuff->srcWidth) == stuff->totalWidth))
- (*pGC->ops->PutImage) (pDraw, pGC, stuff->depth,
- stuff->dstX, stuff->dstY,
- stuff->totalWidth, stuff->srcHeight,
- stuff->srcX, stuff->format,
- shmdesc->addr + stuff->offset +
- (stuff->srcY * length));
- else
- doShmPutImage(pDraw, pGC, stuff->depth, stuff->format,
- stuff->totalWidth, stuff->totalHeight,
- stuff->srcX, stuff->srcY,
- stuff->srcWidth, stuff->srcHeight,
- stuff->dstX, stuff->dstY,
- shmdesc->addr + stuff->offset);
-
- if (stuff->sendEvent)
- {
- xShmCompletionEvent ev;
-
- ev.type = ShmCompletionCode;
- ev.drawable = stuff->drawable;
- ev.minorEvent = X_ShmPutImage;
- ev.majorEvent = ShmReqCode;
- ev.shmseg = stuff->shmseg;
- ev.offset = stuff->offset;
- WriteEventsToClient(client, 1, (xEvent *) &ev);
- }
-
- return Success;
-}
-
-static int
-ProcShmGetImage(ClientPtr client)
-{
- DrawablePtr pDraw;
- long lenPer = 0, length;
- Mask plane = 0;
- xShmGetImageReply xgi;
- ShmDescPtr shmdesc;
- int n, rc;
-
- REQUEST(xShmGetImageReq);
-
- REQUEST_SIZE_MATCH(xShmGetImageReq);
- if ((stuff->format != XYPixmap) && (stuff->format != ZPixmap))
- {
- client->errorValue = stuff->format;
- return BadValue;
- }
- rc = dixLookupDrawable(&pDraw, stuff->drawable, client, 0,
- DixReadAccess);
- if (rc != Success)
- return rc;
- VERIFY_SHMPTR(stuff->shmseg, stuff->offset, TRUE, shmdesc, client);
- if (pDraw->type == DRAWABLE_WINDOW)
- {
- if( /* check for being viewable */
- !((WindowPtr) pDraw)->realized ||
- /* check for being on screen */
- pDraw->x + stuff->x < 0 ||
- pDraw->x + stuff->x + (int)stuff->width > pDraw->pScreen->width ||
- pDraw->y + stuff->y < 0 ||
- pDraw->y + stuff->y + (int)stuff->height > pDraw->pScreen->height ||
- /* check for being inside of border */
- stuff->x < - wBorderWidth((WindowPtr)pDraw) ||
- stuff->x + (int)stuff->width >
- wBorderWidth((WindowPtr)pDraw) + (int)pDraw->width ||
- stuff->y < -wBorderWidth((WindowPtr)pDraw) ||
- stuff->y + (int)stuff->height >
- wBorderWidth((WindowPtr)pDraw) + (int)pDraw->height
- )
- return BadMatch;
- xgi.visual = wVisual(((WindowPtr)pDraw));
- }
- else
- {
- if (stuff->x < 0 ||
- stuff->x+(int)stuff->width > pDraw->width ||
- stuff->y < 0 ||
- stuff->y+(int)stuff->height > pDraw->height
- )
- return BadMatch;
- xgi.visual = None;
- }
- xgi.type = X_Reply;
- xgi.length = 0;
- xgi.sequenceNumber = client->sequence;
- xgi.depth = pDraw->depth;
- if(stuff->format == ZPixmap)
- {
- length = PixmapBytePad(stuff->width, pDraw->depth) * stuff->height;
- }
- else
- {
- lenPer = PixmapBytePad(stuff->width, 1) * stuff->height;
- plane = ((Mask)1) << (pDraw->depth - 1);
- /* only planes asked for */
- length = lenPer * Ones(stuff->planeMask & (plane | (plane - 1)));
- }
-
- VERIFY_SHMSIZE(shmdesc, stuff->offset, length, client);
- xgi.size = length;
-
- if (length == 0)
- {
- /* nothing to do */
- }
- else if (stuff->format == ZPixmap)
- {
- (*pDraw->pScreen->GetImage)(pDraw, stuff->x, stuff->y,
- stuff->width, stuff->height,
- stuff->format, stuff->planeMask,
- shmdesc->addr + stuff->offset);
- }
- else
- {
-
- length = stuff->offset;
- for (; plane; plane >>= 1)
- {
- if (stuff->planeMask & plane)
- {
- (*pDraw->pScreen->GetImage)(pDraw,
- stuff->x, stuff->y,
- stuff->width, stuff->height,
- stuff->format, plane,
- shmdesc->addr + length);
- length += lenPer;
- }
- }
- }
-
- if (client->swapped) {
- swaps(&xgi.sequenceNumber, n);
- swapl(&xgi.length, n);
- swapl(&xgi.visual, n);
- swapl(&xgi.size, n);
- }
- WriteToClient(client, sizeof(xShmGetImageReply), (char *)&xgi);
-
- return Success;
-}
-
-#ifdef PANORAMIX
-static int
-ProcPanoramiXShmPutImage(ClientPtr client)
-{
- int j, result, orig_x, orig_y;
- PanoramiXRes *draw, *gc;
- Bool sendEvent, isRoot;
-
- REQUEST(xShmPutImageReq);
- REQUEST_SIZE_MATCH(xShmPutImageReq);
-
- result = dixLookupResourceByClass((pointer *)&draw, stuff->drawable,
- XRC_DRAWABLE, client, DixWriteAccess);
- if (result != Success)
- return (result == BadValue) ? BadDrawable : result;
-
- result = dixLookupResourceByType((pointer *)&gc, stuff->gc,
- XRT_GC, client, DixReadAccess);
- if (result != Success)
- return result;
-
- isRoot = (draw->type == XRT_WINDOW) && draw->u.win.root;
-
- orig_x = stuff->dstX;
- orig_y = stuff->dstY;
- sendEvent = stuff->sendEvent;
- stuff->sendEvent = 0;
- FOR_NSCREENS(j) {
- if(!j) stuff->sendEvent = sendEvent;
- stuff->drawable = draw->info[j].id;
- stuff->gc = gc->info[j].id;
- if (isRoot) {
- stuff->dstX = orig_x - screenInfo.screens[j]->x;
- stuff->dstY = orig_y - screenInfo.screens[j]->y;
- }
- result = ProcShmPutImage(client);
- if(result != Success) break;
- }
- return result;
-}
-
-static int
-ProcPanoramiXShmGetImage(ClientPtr client)
-{
- PanoramiXRes *draw;
- DrawablePtr *drawables;
- DrawablePtr pDraw;
- xShmGetImageReply xgi;
- ShmDescPtr shmdesc;
- int i, x, y, w, h, format, rc;
- Mask plane = 0, planemask;
- long lenPer = 0, length, widthBytesLine;
- Bool isRoot;
-
- REQUEST(xShmGetImageReq);
-
- REQUEST_SIZE_MATCH(xShmGetImageReq);
-
- if ((stuff->format != XYPixmap) && (stuff->format != ZPixmap)) {
- client->errorValue = stuff->format;
- return BadValue;
- }
-
- rc = dixLookupResourceByClass((pointer *)&draw, stuff->drawable,
- XRC_DRAWABLE, client, DixWriteAccess);
- if (rc != Success)
- return (rc == BadValue) ? BadDrawable : rc;
-
- if (draw->type == XRT_PIXMAP)
- return ProcShmGetImage(client);
-
- rc = dixLookupDrawable(&pDraw, stuff->drawable, client, 0,
- DixReadAccess);
- if (rc != Success)
- return rc;
-
- VERIFY_SHMPTR(stuff->shmseg, stuff->offset, TRUE, shmdesc, client);
-
- x = stuff->x;
- y = stuff->y;
- w = stuff->width;
- h = stuff->height;
- format = stuff->format;
- planemask = stuff->planeMask;
-
- isRoot = (draw->type == XRT_WINDOW) && draw->u.win.root;
-
- if(isRoot) {
- if( /* check for being onscreen */
- x < 0 || x + w > PanoramiXPixWidth ||
- y < 0 || y + h > PanoramiXPixHeight )
- return BadMatch;
- } else {
- if( /* check for being onscreen */
- screenInfo.screens[0]->x + pDraw->x + x < 0 ||
- screenInfo.screens[0]->x + pDraw->x + x + w > PanoramiXPixWidth ||
- screenInfo.screens[0]->y + pDraw->y + y < 0 ||
- screenInfo.screens[0]->y + pDraw->y + y + h > PanoramiXPixHeight ||
- /* check for being inside of border */
- x < - wBorderWidth((WindowPtr)pDraw) ||
- x + w > wBorderWidth((WindowPtr)pDraw) + (int)pDraw->width ||
- y < -wBorderWidth((WindowPtr)pDraw) ||
- y + h > wBorderWidth ((WindowPtr)pDraw) + (int)pDraw->height)
- return BadMatch;
- }
-
- drawables = calloc(PanoramiXNumScreens, sizeof(DrawablePtr));
- if(!drawables)
- return BadAlloc;
-
- drawables[0] = pDraw;
- FOR_NSCREENS_FORWARD_SKIP(i) {
- rc = dixLookupDrawable(drawables+i, draw->info[i].id, client, 0,
- DixReadAccess);
- if (rc != Success)
- {
- free(drawables);
- return rc;
- }
- }
-
- xgi.visual = wVisual(((WindowPtr)pDraw));
- xgi.type = X_Reply;
- xgi.length = 0;
- xgi.sequenceNumber = client->sequence;
- xgi.depth = pDraw->depth;
-
- if(format == ZPixmap) {
- widthBytesLine = PixmapBytePad(w, pDraw->depth);
- length = widthBytesLine * h;
- } else {
- widthBytesLine = PixmapBytePad(w, 1);
- lenPer = widthBytesLine * h;
- plane = ((Mask)1) << (pDraw->depth - 1);
- length = lenPer * Ones(planemask & (plane | (plane - 1)));
- }
-
- VERIFY_SHMSIZE(shmdesc, stuff->offset, length, client);
- xgi.size = length;
-
- if (length == 0) {/* nothing to do */ }
- else if (format == ZPixmap) {
- XineramaGetImageData(drawables, x, y, w, h, format, planemask,
- shmdesc->addr + stuff->offset,
- widthBytesLine, isRoot);
- } else {
-
- length = stuff->offset;
- for (; plane; plane >>= 1) {
- if (planemask & plane) {
- XineramaGetImageData(drawables, x, y, w, h,
- format, plane, shmdesc->addr + length,
- widthBytesLine, isRoot);
- length += lenPer;
- }
- }
- }
- free(drawables);
-
- if (client->swapped) {
- int n;
- swaps(&xgi.sequenceNumber, n);
- swapl(&xgi.length, n);
- swapl(&xgi.visual, n);
- swapl(&xgi.size, n);
- }
- WriteToClient(client, sizeof(xShmGetImageReply), (char *)&xgi);
-
- return Success;
-}
-
-static int
-ProcPanoramiXShmCreatePixmap(ClientPtr client)
-{
- ScreenPtr pScreen = NULL;
- PixmapPtr pMap = NULL;
- DrawablePtr pDraw;
- DepthPtr pDepth;
- int i, j, result, rc;
- ShmDescPtr shmdesc;
- REQUEST(xShmCreatePixmapReq);
- unsigned int width, height, depth;
- unsigned long size;
- PanoramiXRes *newPix;
-
- REQUEST_SIZE_MATCH(xShmCreatePixmapReq);
- client->errorValue = stuff->pid;
- if (!sharedPixmaps)
- return BadImplementation;
- LEGAL_NEW_RESOURCE(stuff->pid, client);
- rc = dixLookupDrawable(&pDraw, stuff->drawable, client, M_ANY,
- DixGetAttrAccess);
- if (rc != Success)
- return rc;
-
- VERIFY_SHMPTR(stuff->shmseg, stuff->offset, TRUE, shmdesc, client);
-
- width = stuff->width;
- height = stuff->height;
- depth = stuff->depth;
- if (!width || !height || !depth)
- {
- client->errorValue = 0;
- return BadValue;
- }
- if (width > 32767 || height > 32767)
- return BadAlloc;
-
- if (stuff->depth != 1)
- {
- pDepth = pDraw->pScreen->allowedDepths;
- for (i=0; i<pDraw->pScreen->numDepths; i++, pDepth++)
- if (pDepth->depth == stuff->depth)
- goto CreatePmap;
- client->errorValue = stuff->depth;
- return BadValue;
- }
-
-CreatePmap:
- size = PixmapBytePad(width, depth) * height;
- if (sizeof(size) == 4 && BitsPerPixel(depth) > 8) {
- if (size < width * height)
- return BadAlloc;
- }
- /* thankfully, offset is unsigned */
- if (stuff->offset + size < size)
- return BadAlloc;
-
- VERIFY_SHMSIZE(shmdesc, stuff->offset, size, client);
-
- if(!(newPix = malloc(sizeof(PanoramiXRes))))
- return BadAlloc;
-
- newPix->type = XRT_PIXMAP;
- newPix->u.pix.shared = TRUE;
- panoramix_setup_ids(newPix, client, stuff->pid);
-
- result = Success;
-
- FOR_NSCREENS(j) {
- ShmScrPrivateRec *screen_priv;
- pScreen = screenInfo.screens[j];
-
- screen_priv = ShmGetScreenPriv(pScreen);
- pMap = (*screen_priv->shmFuncs->CreatePixmap)(pScreen,
- stuff->width, stuff->height, stuff->depth,
- shmdesc->addr + stuff->offset);
-
- if (pMap) {
- dixSetPrivate(&pMap->devPrivates, shmPixmapPrivateKey, shmdesc);
- shmdesc->refcnt++;
- pMap->drawable.serialNumber = NEXT_SERIAL_NUMBER;
- pMap->drawable.id = newPix->info[j].id;
- if (!AddResource(newPix->info[j].id, RT_PIXMAP, (pointer)pMap)) {
- (*pScreen->DestroyPixmap)(pMap);
- result = BadAlloc;
- break;
- }
- } else {
- result = BadAlloc;
- break;
- }
- }
-
- if(result == BadAlloc) {
- while(j--) {
- (*pScreen->DestroyPixmap)(pMap);
- FreeResource(newPix->info[j].id, RT_NONE);
- }
- free(newPix);
- } else
- AddResource(stuff->pid, XRT_PIXMAP, newPix);
-
- return result;
-}
-#endif
-
-static PixmapPtr
-fbShmCreatePixmap (ScreenPtr pScreen,
- int width, int height, int depth, char *addr)
-{
- PixmapPtr pPixmap;
-
- pPixmap = (*pScreen->CreatePixmap)(pScreen, 0, 0, pScreen->rootDepth, 0);
- if (!pPixmap)
- return NullPixmap;
-
- if (!(*pScreen->ModifyPixmapHeader)(pPixmap, width, height, depth,
- BitsPerPixel(depth), PixmapBytePad(width, depth), (pointer)addr)) {
- (*pScreen->DestroyPixmap)(pPixmap);
- return NullPixmap;
- }
- return pPixmap;
-}
-
-static int
-ProcShmCreatePixmap(ClientPtr client)
-{
- PixmapPtr pMap;
- DrawablePtr pDraw;
- DepthPtr pDepth;
- int i, rc;
- ShmDescPtr shmdesc;
- ShmScrPrivateRec *screen_priv;
- REQUEST(xShmCreatePixmapReq);
- unsigned int width, height, depth;
- unsigned long size;
-
- REQUEST_SIZE_MATCH(xShmCreatePixmapReq);
- client->errorValue = stuff->pid;
- if (!sharedPixmaps)
- return BadImplementation;
- LEGAL_NEW_RESOURCE(stuff->pid, client);
- rc = dixLookupDrawable(&pDraw, stuff->drawable, client, M_ANY,
- DixGetAttrAccess);
- if (rc != Success)
- return rc;
-
- VERIFY_SHMPTR(stuff->shmseg, stuff->offset, TRUE, shmdesc, client);
-
- width = stuff->width;
- height = stuff->height;
- depth = stuff->depth;
- if (!width || !height || !depth)
- {
- client->errorValue = 0;
- return BadValue;
- }
- if (width > 32767 || height > 32767)
- return BadAlloc;
-
- if (stuff->depth != 1)
- {
- pDepth = pDraw->pScreen->allowedDepths;
- for (i=0; i<pDraw->pScreen->numDepths; i++, pDepth++)
- if (pDepth->depth == stuff->depth)
- goto CreatePmap;
- client->errorValue = stuff->depth;
- return BadValue;
- }
-
-CreatePmap:
- size = PixmapBytePad(width, depth) * height;
- if (sizeof(size) == 4 && BitsPerPixel(depth) > 8) {
- if (size < width * height)
- return BadAlloc;
- }
- /* thankfully, offset is unsigned */
- if (stuff->offset + size < size)
- return BadAlloc;
-
- VERIFY_SHMSIZE(shmdesc, stuff->offset, size, client);
- screen_priv = ShmGetScreenPriv(pDraw->pScreen);
- pMap = (*screen_priv->shmFuncs->CreatePixmap)(
- pDraw->pScreen, stuff->width,
- stuff->height, stuff->depth,
- shmdesc->addr + stuff->offset);
- if (pMap)
- {
- rc = XaceHook(XACE_RESOURCE_ACCESS, client, stuff->pid, RT_PIXMAP,
- pMap, RT_NONE, NULL, DixCreateAccess);
- if (rc != Success) {
- pDraw->pScreen->DestroyPixmap(pMap);
- return rc;
- }
- dixSetPrivate(&pMap->devPrivates, shmPixmapPrivateKey, shmdesc);
- shmdesc->refcnt++;
- pMap->drawable.serialNumber = NEXT_SERIAL_NUMBER;
- pMap->drawable.id = stuff->pid;
- if (AddResource(stuff->pid, RT_PIXMAP, (pointer)pMap))
- {
- return Success;
- }
- pDraw->pScreen->DestroyPixmap(pMap);
- }
- return BadAlloc;
-}
-
-static int
-ProcShmDispatch (ClientPtr client)
-{
- REQUEST(xReq);
- switch (stuff->data)
- {
- case X_ShmQueryVersion:
- return ProcShmQueryVersion(client);
- case X_ShmAttach:
- return ProcShmAttach(client);
- case X_ShmDetach:
- return ProcShmDetach(client);
- case X_ShmPutImage:
-#ifdef PANORAMIX
- if ( !noPanoramiXExtension )
- return ProcPanoramiXShmPutImage(client);
-#endif
- return ProcShmPutImage(client);
- case X_ShmGetImage:
-#ifdef PANORAMIX
- if ( !noPanoramiXExtension )
- return ProcPanoramiXShmGetImage(client);
-#endif
- return ProcShmGetImage(client);
- case X_ShmCreatePixmap:
-#ifdef PANORAMIX
- if ( !noPanoramiXExtension )
- return ProcPanoramiXShmCreatePixmap(client);
-#endif
- return ProcShmCreatePixmap(client);
- default:
- return BadRequest;
- }
-}
-
-static void
-SShmCompletionEvent(xShmCompletionEvent *from, xShmCompletionEvent *to)
-{
- to->type = from->type;
- cpswaps(from->sequenceNumber, to->sequenceNumber);
- cpswapl(from->drawable, to->drawable);
- cpswaps(from->minorEvent, to->minorEvent);
- to->majorEvent = from->majorEvent;
- cpswapl(from->shmseg, to->shmseg);
- cpswapl(from->offset, to->offset);
-}
-
-static int
-SProcShmQueryVersion(ClientPtr client)
-{
- int n;
- REQUEST(xShmQueryVersionReq);
-
- swaps(&stuff->length, n);
- return ProcShmQueryVersion(client);
-}
-
-static int
-SProcShmAttach(ClientPtr client)
-{
- int n;
- REQUEST(xShmAttachReq);
- swaps(&stuff->length, n);
- REQUEST_SIZE_MATCH(xShmAttachReq);
- swapl(&stuff->shmseg, n);
- swapl(&stuff->shmid, n);
- return ProcShmAttach(client);
-}
-
-static int
-SProcShmDetach(ClientPtr client)
-{
- int n;
- REQUEST(xShmDetachReq);
- swaps(&stuff->length, n);
- REQUEST_SIZE_MATCH(xShmDetachReq);
- swapl(&stuff->shmseg, n);
- return ProcShmDetach(client);
-}
-
-static int
-SProcShmPutImage(ClientPtr client)
-{
- int n;
- REQUEST(xShmPutImageReq);
- swaps(&stuff->length, n);
- REQUEST_SIZE_MATCH(xShmPutImageReq);
- swapl(&stuff->drawable, n);
- swapl(&stuff->gc, n);
- swaps(&stuff->totalWidth, n);
- swaps(&stuff->totalHeight, n);
- swaps(&stuff->srcX, n);
- swaps(&stuff->srcY, n);
- swaps(&stuff->srcWidth, n);
- swaps(&stuff->srcHeight, n);
- swaps(&stuff->dstX, n);
- swaps(&stuff->dstY, n);
- swapl(&stuff->shmseg, n);
- swapl(&stuff->offset, n);
- return ProcShmPutImage(client);
-}
-
-static int
-SProcShmGetImage(ClientPtr client)
-{
- int n;
- REQUEST(xShmGetImageReq);
- swaps(&stuff->length, n);
- REQUEST_SIZE_MATCH(xShmGetImageReq);
- swapl(&stuff->drawable, n);
- swaps(&stuff->x, n);
- swaps(&stuff->y, n);
- swaps(&stuff->width, n);
- swaps(&stuff->height, n);
- swapl(&stuff->planeMask, n);
- swapl(&stuff->shmseg, n);
- swapl(&stuff->offset, n);
- return ProcShmGetImage(client);
-}
-
-static int
-SProcShmCreatePixmap(ClientPtr client)
-{
- int n;
- REQUEST(xShmCreatePixmapReq);
- swaps(&stuff->length, n);
- REQUEST_SIZE_MATCH(xShmCreatePixmapReq);
- swapl(&stuff->pid, n);
- swapl(&stuff->drawable, n);
- swaps(&stuff->width, n);
- swaps(&stuff->height, n);
- swapl(&stuff->shmseg, n);
- swapl(&stuff->offset, n);
- return ProcShmCreatePixmap(client);
-}
-
-static int
-SProcShmDispatch (ClientPtr client)
-{
- REQUEST(xReq);
- switch (stuff->data)
- {
- case X_ShmQueryVersion:
- return SProcShmQueryVersion(client);
- case X_ShmAttach:
- return SProcShmAttach(client);
- case X_ShmDetach:
- return SProcShmDetach(client);
- case X_ShmPutImage:
- return SProcShmPutImage(client);
- case X_ShmGetImage:
- return SProcShmGetImage(client);
- case X_ShmCreatePixmap:
- return SProcShmCreatePixmap(client);
- default:
- return BadRequest;
- }
-}
-
-void
-ShmExtensionInit(INITARGS)
-{
- ExtensionEntry *extEntry;
- int i;
-
-#ifdef MUST_CHECK_FOR_SHM_SYSCALL
- if (!CheckForShmSyscall())
- {
- ErrorF("MIT-SHM extension disabled due to lack of kernel support\n");
- return;
- }
-#endif
-
- if (!ShmRegisterPrivates())
- return;
-
- sharedPixmaps = xFalse;
- {
- sharedPixmaps = xTrue;
- for (i = 0; i < screenInfo.numScreens; i++)
- {
- ShmScrPrivateRec *screen_priv = ShmInitScreenPriv(screenInfo.screens[i]);
- if (!screen_priv->shmFuncs)
- screen_priv->shmFuncs = &miFuncs;
- if (!screen_priv->shmFuncs->CreatePixmap)
- sharedPixmaps = xFalse;
- }
- if (sharedPixmaps)
- for (i = 0; i < screenInfo.numScreens; i++)
- {
- ShmScrPrivateRec *screen_priv = ShmGetScreenPriv(screenInfo.screens[i]);
- screen_priv->destroyPixmap = screenInfo.screens[i]->DestroyPixmap;
- screenInfo.screens[i]->DestroyPixmap = ShmDestroyPixmap;
- }
- }
- ShmSegType = CreateNewResourceType(ShmDetachSegment, "ShmSeg");
- if (ShmSegType &&
- (extEntry = AddExtension(SHMNAME, ShmNumberEvents, ShmNumberErrors,
- ProcShmDispatch, SProcShmDispatch,
- ShmResetProc, StandardMinorOpcode)))
- {
- ShmReqCode = (unsigned char)extEntry->base;
- ShmCompletionCode = extEntry->eventBase;
- BadShmSegCode = extEntry->errorBase;
- SetResourceTypeErrorValue(ShmSegType, BadShmSegCode);
- EventSwapVector[ShmCompletionCode] = (EventSwapPtr) SShmCompletionEvent;
- }
-}
+/************************************************************ + +Copyright 1989, 1998 The Open Group + +Permission to use, copy, modify, distribute, and sell this software and its +documentation for any purpose is hereby granted without fee, provided that +the above copyright notice appear in all copies and that both that +copyright notice and this permission notice appear in supporting +documentation. + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN +AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +Except as contained in this notice, the name of The Open Group shall not be +used in advertising or otherwise to promote the sale, use or other dealings +in this Software without prior written authorization from The Open Group. + +********************************************************/ + +/* THIS IS NOT AN X CONSORTIUM STANDARD OR AN X PROJECT TEAM SPECIFICATION */ + + +#define SHM + +#ifdef HAVE_DIX_CONFIG_H +#include <dix-config.h> +#endif + +#include <sys/types.h> +#if !defined(_MSC_VER) +#include <sys/ipc.h> +#include <sys/shm.h> +#endif +#include <unistd.h> +#include <sys/stat.h> +#include <X11/X.h> +#include <X11/Xproto.h> +#include "misc.h" +#include "os.h" +#include "dixstruct.h" +#include "resource.h" +#include "scrnintstr.h" +#include "windowstr.h" +#include "pixmapstr.h" +#include "gcstruct.h" +#include "extnsionst.h" +#include "servermd.h" +#include "shmint.h" +#include "xace.h" +#include <X11/extensions/shmproto.h> +#include <X11/Xfuncproto.h> +#include "protocol-versions.h" + +/* Needed for Solaris cross-zone shared memory extension */ +#ifdef HAVE_SHMCTL64 +#include <sys/ipc_impl.h> +#define SHMSTAT(id, buf) shmctl64(id, IPC_STAT64, buf) +#define SHMSTAT_TYPE struct shmid_ds64 +#define SHMPERM_TYPE struct ipc_perm64 +#define SHM_PERM(buf) buf.shmx_perm +#define SHM_SEGSZ(buf) buf.shmx_segsz +#define SHMPERM_UID(p) p->ipcx_uid +#define SHMPERM_CUID(p) p->ipcx_cuid +#define SHMPERM_GID(p) p->ipcx_gid +#define SHMPERM_CGID(p) p->ipcx_cgid +#define SHMPERM_MODE(p) p->ipcx_mode +#define SHMPERM_ZONEID(p) p->ipcx_zoneid +#else +#define SHMSTAT(id, buf) shmctl(id, IPC_STAT, buf) +#define SHMSTAT_TYPE struct shmid_ds +#define SHMPERM_TYPE struct ipc_perm +#define SHM_PERM(buf) buf.shm_perm +#define SHM_SEGSZ(buf) buf.shm_segsz +#define SHMPERM_UID(p) p->uid +#define SHMPERM_CUID(p) p->cuid +#define SHMPERM_GID(p) p->gid +#define SHMPERM_CGID(p) p->cgid +#define SHMPERM_MODE(p) p->mode +#endif + +#ifdef PANORAMIX +#include "panoramiX.h" +#include "panoramiXsrv.h" +#endif + +#include "modinit.h" + +typedef struct _ShmDesc { + struct _ShmDesc *next; + int shmid; + int refcnt; + char *addr; + Bool writable; + unsigned long size; +} ShmDescRec, *ShmDescPtr; + +typedef struct _ShmScrPrivateRec { + CloseScreenProcPtr CloseScreen; + ShmFuncsPtr shmFuncs; + DestroyPixmapProcPtr destroyPixmap; +} ShmScrPrivateRec; + +static PixmapPtr fbShmCreatePixmap(XSHM_CREATE_PIXMAP_ARGS); +static int ShmDetachSegment( + pointer /* value */, + XID /* shmseg */ + ); +static void ShmResetProc( + ExtensionEntry * /* extEntry */ + ); +static void SShmCompletionEvent( + xShmCompletionEvent * /* from */, + xShmCompletionEvent * /* to */ + ); + +static Bool ShmDestroyPixmap (PixmapPtr pPixmap); + + +static unsigned char ShmReqCode; +int ShmCompletionCode; +int BadShmSegCode; +RESTYPE ShmSegType; +static ShmDescPtr Shmsegs; +static Bool sharedPixmaps; +static DevPrivateKeyRec shmScrPrivateKeyRec; +#define shmScrPrivateKey (&shmScrPrivateKeyRec) +static DevPrivateKeyRec shmPixmapPrivateKeyRec; +#define shmPixmapPrivateKey (&shmPixmapPrivateKeyRec) +static ShmFuncs miFuncs = {NULL, NULL}; +static ShmFuncs fbFuncs = {fbShmCreatePixmap, NULL}; + +#define ShmGetScreenPriv(s) ((ShmScrPrivateRec *)dixLookupPrivate(&(s)->devPrivates, shmScrPrivateKey)) + +#define VERIFY_SHMSEG(shmseg,shmdesc,client) \ +{ \ + int rc; \ + rc = dixLookupResourceByType((pointer *)&(shmdesc), shmseg, ShmSegType, \ + client, DixReadAccess); \ + if (rc != Success) \ + return rc; \ +} + +#define VERIFY_SHMPTR(shmseg,offset,needwrite,shmdesc,client) \ +{ \ + VERIFY_SHMSEG(shmseg, shmdesc, client); \ + if ((offset & 3) || (offset > shmdesc->size)) \ + { \ + client->errorValue = offset; \ + return BadValue; \ + } \ + if (needwrite && !shmdesc->writable) \ + return BadAccess; \ +} + +#define VERIFY_SHMSIZE(shmdesc,offset,len,client) \ +{ \ + if ((offset + len) > shmdesc->size) \ + { \ + return BadAccess; \ + } \ +} + + +#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__CYGWIN__) || defined(__DragonFly__) +#include <sys/signal.h> + +static Bool badSysCall = FALSE; + +static void +SigSysHandler(int signo) +{ + badSysCall = TRUE; +} + +static Bool CheckForShmSyscall(void) +{ + void (*oldHandler)(); + int shmid = -1; + + /* If no SHM support in the kernel, the bad syscall will generate SIGSYS */ + oldHandler = signal(SIGSYS, SigSysHandler); + + badSysCall = FALSE; + shmid = shmget(IPC_PRIVATE, 4096, IPC_CREAT); + + if (shmid != -1) + { + /* Successful allocation - clean up */ + shmctl(shmid, IPC_RMID, NULL); + } + else + { + /* Allocation failed */ + badSysCall = TRUE; + } + signal(SIGSYS, oldHandler); + return !badSysCall; +} + +#define MUST_CHECK_FOR_SHM_SYSCALL + +#endif + +static Bool +ShmCloseScreen(int i, ScreenPtr pScreen) +{ + ShmScrPrivateRec *screen_priv = ShmGetScreenPriv(pScreen); + pScreen->CloseScreen = screen_priv->CloseScreen; + dixSetPrivate(&pScreen->devPrivates, shmScrPrivateKey, NULL); + free(screen_priv); + return (*pScreen->CloseScreen) (i, pScreen); +} + +static ShmScrPrivateRec * +ShmInitScreenPriv(ScreenPtr pScreen) +{ + ShmScrPrivateRec *screen_priv = ShmGetScreenPriv(pScreen); + if (!screen_priv) + { + screen_priv = calloc(1, sizeof (ShmScrPrivateRec)); + screen_priv->CloseScreen = pScreen->CloseScreen; + dixSetPrivate(&pScreen->devPrivates, shmScrPrivateKey, screen_priv); + pScreen->CloseScreen = ShmCloseScreen; + } + return screen_priv; +} + +static Bool +ShmRegisterPrivates(void) +{ + if (!dixRegisterPrivateKey(&shmScrPrivateKeyRec, PRIVATE_SCREEN, 0)) + return FALSE; + if (!dixRegisterPrivateKey(&shmPixmapPrivateKeyRec, PRIVATE_PIXMAP, 0)) + return FALSE; + return TRUE; +} + +/*ARGSUSED*/ +static void +ShmResetProc(ExtensionEntry *extEntry) +{ + int i; + for (i = 0; i < screenInfo.numScreens; i++) + ShmRegisterFuncs(screenInfo.screens[i], NULL); +} + +void +ShmRegisterFuncs(ScreenPtr pScreen, ShmFuncsPtr funcs) +{ + if (!ShmRegisterPrivates()) + return; + ShmInitScreenPriv(pScreen)->shmFuncs = funcs; +} + +static Bool +ShmDestroyPixmap (PixmapPtr pPixmap) +{ + ScreenPtr pScreen = pPixmap->drawable.pScreen; + ShmScrPrivateRec *screen_priv = ShmGetScreenPriv(pScreen); + Bool ret; + if (pPixmap->refcnt == 1) + { + ShmDescPtr shmdesc; + shmdesc = (ShmDescPtr)dixLookupPrivate(&pPixmap->devPrivates, + shmPixmapPrivateKey); + if (shmdesc) + ShmDetachSegment ((pointer) shmdesc, pPixmap->drawable.id); + } + + pScreen->DestroyPixmap = screen_priv->destroyPixmap; + ret = (*pScreen->DestroyPixmap) (pPixmap); + screen_priv->destroyPixmap = pScreen->DestroyPixmap; + pScreen->DestroyPixmap = ShmDestroyPixmap; + return ret; +} + +void +ShmRegisterFbFuncs(ScreenPtr pScreen) +{ + ShmRegisterFuncs(pScreen, &fbFuncs); +} + +static int +ProcShmQueryVersion(ClientPtr client) +{ + xShmQueryVersionReply rep; + int n; + + REQUEST_SIZE_MATCH(xShmQueryVersionReq); + memset(&rep, 0, sizeof(xShmQueryVersionReply)); + rep.type = X_Reply; + rep.length = 0; + rep.sequenceNumber = client->sequence; + rep.sharedPixmaps = sharedPixmaps; + rep.pixmapFormat = sharedPixmaps ? ZPixmap : 0; + rep.majorVersion = SERVER_SHM_MAJOR_VERSION; + rep.minorVersion = SERVER_SHM_MINOR_VERSION; +#ifndef _MSC_VER + rep.uid = geteuid(); + rep.gid = getegid(); +#endif + if (client->swapped) { + swaps(&rep.sequenceNumber, n); + swapl(&rep.length, n); + swaps(&rep.majorVersion, n); + swaps(&rep.minorVersion, n); + swaps(&rep.uid, n); + swaps(&rep.gid, n); + } + WriteToClient(client, sizeof(xShmQueryVersionReply), (char *)&rep); + return Success; +} + +/* + * Simulate the access() system call for a shared memory segement, + * using the credentials from the client if available + */ +static int +shm_access(ClientPtr client, SHMPERM_TYPE *perm, int readonly) +{ + int uid, gid; + mode_t mask; + int uidset = 0, gidset = 0; + LocalClientCredRec *lcc; + + if (GetLocalClientCreds(client, &lcc) != -1) { + + if (lcc->fieldsSet & LCC_UID_SET) { + uid = lcc->euid; + uidset = 1; + } + if (lcc->fieldsSet & LCC_GID_SET) { + gid = lcc->egid; + gidset = 1; + } + +#if defined(HAVE_GETZONEID) && defined(SHMPERM_ZONEID) + if ( ((lcc->fieldsSet & LCC_ZID_SET) == 0) || (lcc->zoneid == -1) + || (lcc->zoneid != SHMPERM_ZONEID(perm))) { + uidset = 0; + gidset = 0; + } +#endif + FreeLocalClientCreds(lcc); + + if (uidset) { + /* User id 0 always gets access */ + if (uid == 0) { + return 0; + } + #ifdef _MSC_VER + __asm int 3; + #else + /* Check the owner */ + if (SHMPERM_UID(perm) == uid || SHMPERM_CUID(perm) == uid) { + mask = S_IRUSR; + if (!readonly) { + mask |= S_IWUSR; + } + return (SHMPERM_MODE(perm) & mask) == mask ? 0 : -1; + } + #endif + } + + if (gidset) { + /* Check the group */ + #ifdef _MSC_VER + __asm int 3; + #else + if (SHMPERM_GID(perm) == gid || SHMPERM_CGID(perm) == gid) { + mask = S_IRGRP; + if (!readonly) { + mask |= S_IWGRP; + } + return (SHMPERM_MODE(perm) & mask) == mask ? 0 : -1; + } + #endif + } + } + #ifdef _MSC_VER + __asm int 3; + return -1; + #else + /* Otherwise, check everyone else */ + mask = S_IROTH; + if (!readonly) { + mask |= S_IWOTH; + } + return (SHMPERM_MODE(perm) & mask) == mask ? 0 : -1; + #endif +} + +static int +ProcShmAttach(ClientPtr client) +{ + SHMSTAT_TYPE buf; + ShmDescPtr shmdesc; + REQUEST(xShmAttachReq); + + REQUEST_SIZE_MATCH(xShmAttachReq); + LEGAL_NEW_RESOURCE(stuff->shmseg, client); + if ((stuff->readOnly != xTrue) && (stuff->readOnly != xFalse)) + { + client->errorValue = stuff->readOnly; + return BadValue; + } + for (shmdesc = Shmsegs; + shmdesc && (shmdesc->shmid != stuff->shmid); + shmdesc = shmdesc->next) + ; + if (shmdesc) + { + if (!stuff->readOnly && !shmdesc->writable) + return BadAccess; + shmdesc->refcnt++; + } + else + { + shmdesc = malloc(sizeof(ShmDescRec)); + if (!shmdesc) + return BadAlloc; + shmdesc->addr = shmat(stuff->shmid, 0, + stuff->readOnly ? SHM_RDONLY : 0); + if ((shmdesc->addr == ((char *)-1)) || + SHMSTAT(stuff->shmid, &buf)) + { + free(shmdesc); + return BadAccess; + } + + /* The attach was performed with root privs. We must + * do manual checking of access rights for the credentials + * of the client */ + + if (shm_access(client, &(SHM_PERM(buf)), stuff->readOnly) == -1) { + shmdt(shmdesc->addr); + free(shmdesc); + return BadAccess; + } + + shmdesc->shmid = stuff->shmid; + shmdesc->refcnt = 1; + shmdesc->writable = !stuff->readOnly; + shmdesc->size = SHM_SEGSZ(buf); + shmdesc->next = Shmsegs; + Shmsegs = shmdesc; + } + if (!AddResource(stuff->shmseg, ShmSegType, (pointer)shmdesc)) + return BadAlloc; + return Success; +} + +/*ARGSUSED*/ +static int +ShmDetachSegment(pointer value, /* must conform to DeleteType */ + XID shmseg) +{ + ShmDescPtr shmdesc = (ShmDescPtr)value; + ShmDescPtr *prev; + + if (--shmdesc->refcnt) + return TRUE; +#ifndef _MSC_VER + shmdt(shmdesc->addr); +#endif + for (prev = &Shmsegs; *prev != shmdesc; prev = &(*prev)->next) + ; + *prev = shmdesc->next; + free(shmdesc); + return Success; +} + +static int +ProcShmDetach(ClientPtr client) +{ + ShmDescPtr shmdesc; + REQUEST(xShmDetachReq); + + REQUEST_SIZE_MATCH(xShmDetachReq); + VERIFY_SHMSEG(stuff->shmseg, shmdesc, client); + FreeResource(stuff->shmseg, RT_NONE); + return Success; +} + +/* + * If the given request doesn't exactly match PutImage's constraints, + * wrap the image in a scratch pixmap header and let CopyArea sort it out. + */ +static void +doShmPutImage(DrawablePtr dst, GCPtr pGC, + int depth, unsigned int format, + int w, int h, int sx, int sy, int sw, int sh, int dx, int dy, + char *data) +{ + PixmapPtr pPixmap; + + if (format == ZPixmap || depth == 1) { + pPixmap = GetScratchPixmapHeader(dst->pScreen, w, h, depth, + BitsPerPixel(depth), + PixmapBytePad(w, depth), + data); + if (!pPixmap) + return; + pGC->ops->CopyArea((DrawablePtr)pPixmap, dst, pGC, sx, sy, sw, sh, dx, dy); + FreeScratchPixmapHeader(pPixmap); + } else { + GCPtr putGC = GetScratchGC(depth, dst->pScreen); + + if (!putGC) + return; + + pPixmap = (*dst->pScreen->CreatePixmap)(dst->pScreen, sw, sh, depth, + CREATE_PIXMAP_USAGE_SCRATCH); + if (!pPixmap) { + FreeScratchGC(putGC); + return; + } + ValidateGC(&pPixmap->drawable, putGC); + (*putGC->ops->PutImage)(&pPixmap->drawable, putGC, depth, -sx, -sy, w, h, 0, + (format == XYPixmap) ? XYPixmap : ZPixmap, data); + FreeScratchGC(putGC); + if (format == XYBitmap) + (void)(*pGC->ops->CopyPlane)(&pPixmap->drawable, dst, pGC, 0, 0, sw, sh, + dx, dy, 1L); + else + (void)(*pGC->ops->CopyArea)(&pPixmap->drawable, dst, pGC, 0, 0, sw, sh, + dx, dy); + (*pPixmap->drawable.pScreen->DestroyPixmap)(pPixmap); + } +} + +static int +ProcShmPutImage(ClientPtr client) +{ + GCPtr pGC; + DrawablePtr pDraw; + long length; + ShmDescPtr shmdesc; + REQUEST(xShmPutImageReq); + + REQUEST_SIZE_MATCH(xShmPutImageReq); + VALIDATE_DRAWABLE_AND_GC(stuff->drawable, pDraw, DixWriteAccess); + VERIFY_SHMPTR(stuff->shmseg, stuff->offset, FALSE, shmdesc, client); + if ((stuff->sendEvent != xTrue) && (stuff->sendEvent != xFalse)) + return BadValue; + if (stuff->format == XYBitmap) + { + if (stuff->depth != 1) + return BadMatch; + length = PixmapBytePad(stuff->totalWidth, 1); + } + else if (stuff->format == XYPixmap) + { + if (pDraw->depth != stuff->depth) + return BadMatch; + length = PixmapBytePad(stuff->totalWidth, 1); + length *= stuff->depth; + } + else if (stuff->format == ZPixmap) + { + if (pDraw->depth != stuff->depth) + return BadMatch; + length = PixmapBytePad(stuff->totalWidth, stuff->depth); + } + else + { + client->errorValue = stuff->format; + return BadValue; + } + + /* + * There's a potential integer overflow in this check: + * VERIFY_SHMSIZE(shmdesc, stuff->offset, length * stuff->totalHeight, + * client); + * the version below ought to avoid it + */ + if (stuff->totalHeight != 0 && + length > (shmdesc->size - stuff->offset)/stuff->totalHeight) { + client->errorValue = stuff->totalWidth; + return BadValue; + } + if (stuff->srcX > stuff->totalWidth) + { + client->errorValue = stuff->srcX; + return BadValue; + } + if (stuff->srcY > stuff->totalHeight) + { + client->errorValue = stuff->srcY; + return BadValue; + } + if ((stuff->srcX + stuff->srcWidth) > stuff->totalWidth) + { + client->errorValue = stuff->srcWidth; + return BadValue; + } + if ((stuff->srcY + stuff->srcHeight) > stuff->totalHeight) + { + client->errorValue = stuff->srcHeight; + return BadValue; + } + + if ((((stuff->format == ZPixmap) && (stuff->srcX == 0)) || + ((stuff->format != ZPixmap) && + (stuff->srcX < screenInfo.bitmapScanlinePad) && + ((stuff->format == XYBitmap) || + ((stuff->srcY == 0) && + (stuff->srcHeight == stuff->totalHeight))))) && + ((stuff->srcX + stuff->srcWidth) == stuff->totalWidth)) + (*pGC->ops->PutImage) (pDraw, pGC, stuff->depth, + stuff->dstX, stuff->dstY, + stuff->totalWidth, stuff->srcHeight, + stuff->srcX, stuff->format, + shmdesc->addr + stuff->offset + + (stuff->srcY * length)); + else + doShmPutImage(pDraw, pGC, stuff->depth, stuff->format, + stuff->totalWidth, stuff->totalHeight, + stuff->srcX, stuff->srcY, + stuff->srcWidth, stuff->srcHeight, + stuff->dstX, stuff->dstY, + shmdesc->addr + stuff->offset); + + if (stuff->sendEvent) + { + xShmCompletionEvent ev; + + ev.type = ShmCompletionCode; + ev.drawable = stuff->drawable; + ev.minorEvent = X_ShmPutImage; + ev.majorEvent = ShmReqCode; + ev.shmseg = stuff->shmseg; + ev.offset = stuff->offset; + WriteEventsToClient(client, 1, (xEvent *) &ev); + } + + return Success; +} + +static int +ProcShmGetImage(ClientPtr client) +{ + DrawablePtr pDraw; + long lenPer = 0, length; + Mask plane = 0; + xShmGetImageReply xgi; + ShmDescPtr shmdesc; + int n, rc; + + REQUEST(xShmGetImageReq); + + REQUEST_SIZE_MATCH(xShmGetImageReq); + if ((stuff->format != XYPixmap) && (stuff->format != ZPixmap)) + { + client->errorValue = stuff->format; + return BadValue; + } + rc = dixLookupDrawable(&pDraw, stuff->drawable, client, 0, + DixReadAccess); + if (rc != Success) + return rc; + VERIFY_SHMPTR(stuff->shmseg, stuff->offset, TRUE, shmdesc, client); + if (pDraw->type == DRAWABLE_WINDOW) + { + if( /* check for being viewable */ + !((WindowPtr) pDraw)->realized || + /* check for being on screen */ + pDraw->x + stuff->x < 0 || + pDraw->x + stuff->x + (int)stuff->width > pDraw->pScreen->width || + pDraw->y + stuff->y < 0 || + pDraw->y + stuff->y + (int)stuff->height > pDraw->pScreen->height || + /* check for being inside of border */ + stuff->x < - wBorderWidth((WindowPtr)pDraw) || + stuff->x + (int)stuff->width > + wBorderWidth((WindowPtr)pDraw) + (int)pDraw->width || + stuff->y < -wBorderWidth((WindowPtr)pDraw) || + stuff->y + (int)stuff->height > + wBorderWidth((WindowPtr)pDraw) + (int)pDraw->height + ) + return BadMatch; + xgi.visual = wVisual(((WindowPtr)pDraw)); + } + else + { + if (stuff->x < 0 || + stuff->x+(int)stuff->width > pDraw->width || + stuff->y < 0 || + stuff->y+(int)stuff->height > pDraw->height + ) + return BadMatch; + xgi.visual = None; + } + xgi.type = X_Reply; + xgi.length = 0; + xgi.sequenceNumber = client->sequence; + xgi.depth = pDraw->depth; + if(stuff->format == ZPixmap) + { + length = PixmapBytePad(stuff->width, pDraw->depth) * stuff->height; + } + else + { + lenPer = PixmapBytePad(stuff->width, 1) * stuff->height; + plane = ((Mask)1) << (pDraw->depth - 1); + /* only planes asked for */ + length = lenPer * Ones(stuff->planeMask & (plane | (plane - 1))); + } + + VERIFY_SHMSIZE(shmdesc, stuff->offset, length, client); + xgi.size = length; + + if (length == 0) + { + /* nothing to do */ + } + else if (stuff->format == ZPixmap) + { + (*pDraw->pScreen->GetImage)(pDraw, stuff->x, stuff->y, + stuff->width, stuff->height, + stuff->format, stuff->planeMask, + shmdesc->addr + stuff->offset); + } + else + { + + length = stuff->offset; + for (; plane; plane >>= 1) + { + if (stuff->planeMask & plane) + { + (*pDraw->pScreen->GetImage)(pDraw, + stuff->x, stuff->y, + stuff->width, stuff->height, + stuff->format, plane, + shmdesc->addr + length); + length += lenPer; + } + } + } + + if (client->swapped) { + swaps(&xgi.sequenceNumber, n); + swapl(&xgi.length, n); + swapl(&xgi.visual, n); + swapl(&xgi.size, n); + } + WriteToClient(client, sizeof(xShmGetImageReply), (char *)&xgi); + + return Success; +} + +#ifdef PANORAMIX +static int +ProcPanoramiXShmPutImage(ClientPtr client) +{ + int j, result, orig_x, orig_y; + PanoramiXRes *draw, *gc; + Bool sendEvent, isRoot; + + REQUEST(xShmPutImageReq); + REQUEST_SIZE_MATCH(xShmPutImageReq); + + result = dixLookupResourceByClass((pointer *)&draw, stuff->drawable, + XRC_DRAWABLE, client, DixWriteAccess); + if (result != Success) + return (result == BadValue) ? BadDrawable : result; + + result = dixLookupResourceByType((pointer *)&gc, stuff->gc, + XRT_GC, client, DixReadAccess); + if (result != Success) + return result; + + isRoot = (draw->type == XRT_WINDOW) && draw->u.win.root; + + orig_x = stuff->dstX; + orig_y = stuff->dstY; + sendEvent = stuff->sendEvent; + stuff->sendEvent = 0; + FOR_NSCREENS(j) { + if(!j) stuff->sendEvent = sendEvent; + stuff->drawable = draw->info[j].id; + stuff->gc = gc->info[j].id; + if (isRoot) { + stuff->dstX = orig_x - screenInfo.screens[j]->x; + stuff->dstY = orig_y - screenInfo.screens[j]->y; + } + result = ProcShmPutImage(client); + if(result != Success) break; + } + return result; +} + +static int +ProcPanoramiXShmGetImage(ClientPtr client) +{ + PanoramiXRes *draw; + DrawablePtr *drawables; + DrawablePtr pDraw; + xShmGetImageReply xgi; + ShmDescPtr shmdesc; + int i, x, y, w, h, format, rc; + Mask plane = 0, planemask; + long lenPer = 0, length, widthBytesLine; + Bool isRoot; + + REQUEST(xShmGetImageReq); + + REQUEST_SIZE_MATCH(xShmGetImageReq); + + if ((stuff->format != XYPixmap) && (stuff->format != ZPixmap)) { + client->errorValue = stuff->format; + return BadValue; + } + + rc = dixLookupResourceByClass((pointer *)&draw, stuff->drawable, + XRC_DRAWABLE, client, DixWriteAccess); + if (rc != Success) + return (rc == BadValue) ? BadDrawable : rc; + + if (draw->type == XRT_PIXMAP) + return ProcShmGetImage(client); + + rc = dixLookupDrawable(&pDraw, stuff->drawable, client, 0, + DixReadAccess); + if (rc != Success) + return rc; + + VERIFY_SHMPTR(stuff->shmseg, stuff->offset, TRUE, shmdesc, client); + + x = stuff->x; + y = stuff->y; + w = stuff->width; + h = stuff->height; + format = stuff->format; + planemask = stuff->planeMask; + + isRoot = (draw->type == XRT_WINDOW) && draw->u.win.root; + + if(isRoot) { + if( /* check for being onscreen */ + x < 0 || x + w > PanoramiXPixWidth || + y < 0 || y + h > PanoramiXPixHeight ) + return BadMatch; + } else { + if( /* check for being onscreen */ + screenInfo.screens[0]->x + pDraw->x + x < 0 || + screenInfo.screens[0]->x + pDraw->x + x + w > PanoramiXPixWidth || + screenInfo.screens[0]->y + pDraw->y + y < 0 || + screenInfo.screens[0]->y + pDraw->y + y + h > PanoramiXPixHeight || + /* check for being inside of border */ + x < - wBorderWidth((WindowPtr)pDraw) || + x + w > wBorderWidth((WindowPtr)pDraw) + (int)pDraw->width || + y < -wBorderWidth((WindowPtr)pDraw) || + y + h > wBorderWidth ((WindowPtr)pDraw) + (int)pDraw->height) + return BadMatch; + } + + drawables = calloc(PanoramiXNumScreens, sizeof(DrawablePtr)); + if(!drawables) + return BadAlloc; + + drawables[0] = pDraw; + FOR_NSCREENS_FORWARD_SKIP(i) { + rc = dixLookupDrawable(drawables+i, draw->info[i].id, client, 0, + DixReadAccess); + if (rc != Success) + { + free(drawables); + return rc; + } + } + + xgi.visual = wVisual(((WindowPtr)pDraw)); + xgi.type = X_Reply; + xgi.length = 0; + xgi.sequenceNumber = client->sequence; + xgi.depth = pDraw->depth; + + if(format == ZPixmap) { + widthBytesLine = PixmapBytePad(w, pDraw->depth); + length = widthBytesLine * h; + } else { + widthBytesLine = PixmapBytePad(w, 1); + lenPer = widthBytesLine * h; + plane = ((Mask)1) << (pDraw->depth - 1); + length = lenPer * Ones(planemask & (plane | (plane - 1))); + } + + VERIFY_SHMSIZE(shmdesc, stuff->offset, length, client); + xgi.size = length; + + if (length == 0) {/* nothing to do */ } + else if (format == ZPixmap) { + XineramaGetImageData(drawables, x, y, w, h, format, planemask, + shmdesc->addr + stuff->offset, + widthBytesLine, isRoot); + } else { + + length = stuff->offset; + for (; plane; plane >>= 1) { + if (planemask & plane) { + XineramaGetImageData(drawables, x, y, w, h, + format, plane, shmdesc->addr + length, + widthBytesLine, isRoot); + length += lenPer; + } + } + } + free(drawables); + + if (client->swapped) { + int n; + swaps(&xgi.sequenceNumber, n); + swapl(&xgi.length, n); + swapl(&xgi.visual, n); + swapl(&xgi.size, n); + } + WriteToClient(client, sizeof(xShmGetImageReply), (char *)&xgi); + + return Success; +} + +static int +ProcPanoramiXShmCreatePixmap(ClientPtr client) +{ + ScreenPtr pScreen = NULL; + PixmapPtr pMap = NULL; + DrawablePtr pDraw; + DepthPtr pDepth; + int i, j, result, rc; + ShmDescPtr shmdesc; + REQUEST(xShmCreatePixmapReq); + unsigned int width, height, depth; + unsigned long size; + PanoramiXRes *newPix; + + REQUEST_SIZE_MATCH(xShmCreatePixmapReq); + client->errorValue = stuff->pid; + if (!sharedPixmaps) + return BadImplementation; + LEGAL_NEW_RESOURCE(stuff->pid, client); + rc = dixLookupDrawable(&pDraw, stuff->drawable, client, M_ANY, + DixGetAttrAccess); + if (rc != Success) + return rc; + + VERIFY_SHMPTR(stuff->shmseg, stuff->offset, TRUE, shmdesc, client); + + width = stuff->width; + height = stuff->height; + depth = stuff->depth; + if (!width || !height || !depth) + { + client->errorValue = 0; + return BadValue; + } + if (width > 32767 || height > 32767) + return BadAlloc; + + if (stuff->depth != 1) + { + pDepth = pDraw->pScreen->allowedDepths; + for (i=0; i<pDraw->pScreen->numDepths; i++, pDepth++) + if (pDepth->depth == stuff->depth) + goto CreatePmap; + client->errorValue = stuff->depth; + return BadValue; + } + +CreatePmap: + size = PixmapBytePad(width, depth) * height; + if (sizeof(size) == 4 && BitsPerPixel(depth) > 8) { + if (size < width * height) + return BadAlloc; + } + /* thankfully, offset is unsigned */ + if (stuff->offset + size < size) + return BadAlloc; + + VERIFY_SHMSIZE(shmdesc, stuff->offset, size, client); + + if(!(newPix = malloc(sizeof(PanoramiXRes)))) + return BadAlloc; + + newPix->type = XRT_PIXMAP; + newPix->u.pix.shared = TRUE; + panoramix_setup_ids(newPix, client, stuff->pid); + + result = Success; + + FOR_NSCREENS(j) { + ShmScrPrivateRec *screen_priv; + pScreen = screenInfo.screens[j]; + + screen_priv = ShmGetScreenPriv(pScreen); + pMap = (*screen_priv->shmFuncs->CreatePixmap)(pScreen, + stuff->width, stuff->height, stuff->depth, + shmdesc->addr + stuff->offset); + + if (pMap) { + dixSetPrivate(&pMap->devPrivates, shmPixmapPrivateKey, shmdesc); + shmdesc->refcnt++; + pMap->drawable.serialNumber = NEXT_SERIAL_NUMBER; + pMap->drawable.id = newPix->info[j].id; + if (!AddResource(newPix->info[j].id, RT_PIXMAP, (pointer)pMap)) { + (*pScreen->DestroyPixmap)(pMap); + result = BadAlloc; + break; + } + } else { + result = BadAlloc; + break; + } + } + + if(result == BadAlloc) { + while(j--) { + (*pScreen->DestroyPixmap)(pMap); + FreeResource(newPix->info[j].id, RT_NONE); + } + free(newPix); + } else + AddResource(stuff->pid, XRT_PIXMAP, newPix); + + return result; +} +#endif + +static PixmapPtr +fbShmCreatePixmap (ScreenPtr pScreen, + int width, int height, int depth, char *addr) +{ + PixmapPtr pPixmap; + + pPixmap = (*pScreen->CreatePixmap)(pScreen, 0, 0, pScreen->rootDepth, 0); + if (!pPixmap) + return NullPixmap; + + if (!(*pScreen->ModifyPixmapHeader)(pPixmap, width, height, depth, + BitsPerPixel(depth), PixmapBytePad(width, depth), (pointer)addr)) { + (*pScreen->DestroyPixmap)(pPixmap); + return NullPixmap; + } + return pPixmap; +} + +static int +ProcShmCreatePixmap(ClientPtr client) +{ + PixmapPtr pMap; + DrawablePtr pDraw; + DepthPtr pDepth; + int i, rc; + ShmDescPtr shmdesc; + ShmScrPrivateRec *screen_priv; + REQUEST(xShmCreatePixmapReq); + unsigned int width, height, depth; + unsigned long size; + + REQUEST_SIZE_MATCH(xShmCreatePixmapReq); + client->errorValue = stuff->pid; + if (!sharedPixmaps) + return BadImplementation; + LEGAL_NEW_RESOURCE(stuff->pid, client); + rc = dixLookupDrawable(&pDraw, stuff->drawable, client, M_ANY, + DixGetAttrAccess); + if (rc != Success) + return rc; + + VERIFY_SHMPTR(stuff->shmseg, stuff->offset, TRUE, shmdesc, client); + + width = stuff->width; + height = stuff->height; + depth = stuff->depth; + if (!width || !height || !depth) + { + client->errorValue = 0; + return BadValue; + } + if (width > 32767 || height > 32767) + return BadAlloc; + + if (stuff->depth != 1) + { + pDepth = pDraw->pScreen->allowedDepths; + for (i=0; i<pDraw->pScreen->numDepths; i++, pDepth++) + if (pDepth->depth == stuff->depth) + goto CreatePmap; + client->errorValue = stuff->depth; + return BadValue; + } + +CreatePmap: + size = PixmapBytePad(width, depth) * height; + if (sizeof(size) == 4 && BitsPerPixel(depth) > 8) { + if (size < width * height) + return BadAlloc; + } + /* thankfully, offset is unsigned */ + if (stuff->offset + size < size) + return BadAlloc; + + VERIFY_SHMSIZE(shmdesc, stuff->offset, size, client); + screen_priv = ShmGetScreenPriv(pDraw->pScreen); + pMap = (*screen_priv->shmFuncs->CreatePixmap)( + pDraw->pScreen, stuff->width, + stuff->height, stuff->depth, + shmdesc->addr + stuff->offset); + if (pMap) + { + rc = XaceHook(XACE_RESOURCE_ACCESS, client, stuff->pid, RT_PIXMAP, + pMap, RT_NONE, NULL, DixCreateAccess); + if (rc != Success) { + pDraw->pScreen->DestroyPixmap(pMap); + return rc; + } + dixSetPrivate(&pMap->devPrivates, shmPixmapPrivateKey, shmdesc); + shmdesc->refcnt++; + pMap->drawable.serialNumber = NEXT_SERIAL_NUMBER; + pMap->drawable.id = stuff->pid; + if (AddResource(stuff->pid, RT_PIXMAP, (pointer)pMap)) + { + return Success; + } + pDraw->pScreen->DestroyPixmap(pMap); + } + return BadAlloc; +} + +static int +ProcShmDispatch (ClientPtr client) +{ + REQUEST(xReq); + switch (stuff->data) + { + case X_ShmQueryVersion: + return ProcShmQueryVersion(client); + case X_ShmAttach: + return ProcShmAttach(client); + case X_ShmDetach: + return ProcShmDetach(client); + case X_ShmPutImage: +#ifdef PANORAMIX + if ( !noPanoramiXExtension ) + return ProcPanoramiXShmPutImage(client); +#endif + return ProcShmPutImage(client); + case X_ShmGetImage: +#ifdef PANORAMIX + if ( !noPanoramiXExtension ) + return ProcPanoramiXShmGetImage(client); +#endif + return ProcShmGetImage(client); + case X_ShmCreatePixmap: +#ifdef PANORAMIX + if ( !noPanoramiXExtension ) + return ProcPanoramiXShmCreatePixmap(client); +#endif + return ProcShmCreatePixmap(client); + default: + return BadRequest; + } +} + +static void +SShmCompletionEvent(xShmCompletionEvent *from, xShmCompletionEvent *to) +{ + to->type = from->type; + cpswaps(from->sequenceNumber, to->sequenceNumber); + cpswapl(from->drawable, to->drawable); + cpswaps(from->minorEvent, to->minorEvent); + to->majorEvent = from->majorEvent; + cpswapl(from->shmseg, to->shmseg); + cpswapl(from->offset, to->offset); +} + +static int +SProcShmQueryVersion(ClientPtr client) +{ + int n; + REQUEST(xShmQueryVersionReq); + + swaps(&stuff->length, n); + return ProcShmQueryVersion(client); +} + +static int +SProcShmAttach(ClientPtr client) +{ + int n; + REQUEST(xShmAttachReq); + swaps(&stuff->length, n); + REQUEST_SIZE_MATCH(xShmAttachReq); + swapl(&stuff->shmseg, n); + swapl(&stuff->shmid, n); + return ProcShmAttach(client); +} + +static int +SProcShmDetach(ClientPtr client) +{ + int n; + REQUEST(xShmDetachReq); + swaps(&stuff->length, n); + REQUEST_SIZE_MATCH(xShmDetachReq); + swapl(&stuff->shmseg, n); + return ProcShmDetach(client); +} + +static int +SProcShmPutImage(ClientPtr client) +{ + int n; + REQUEST(xShmPutImageReq); + swaps(&stuff->length, n); + REQUEST_SIZE_MATCH(xShmPutImageReq); + swapl(&stuff->drawable, n); + swapl(&stuff->gc, n); + swaps(&stuff->totalWidth, n); + swaps(&stuff->totalHeight, n); + swaps(&stuff->srcX, n); + swaps(&stuff->srcY, n); + swaps(&stuff->srcWidth, n); + swaps(&stuff->srcHeight, n); + swaps(&stuff->dstX, n); + swaps(&stuff->dstY, n); + swapl(&stuff->shmseg, n); + swapl(&stuff->offset, n); + return ProcShmPutImage(client); +} + +static int +SProcShmGetImage(ClientPtr client) +{ + int n; + REQUEST(xShmGetImageReq); + swaps(&stuff->length, n); + REQUEST_SIZE_MATCH(xShmGetImageReq); + swapl(&stuff->drawable, n); + swaps(&stuff->x, n); + swaps(&stuff->y, n); + swaps(&stuff->width, n); + swaps(&stuff->height, n); + swapl(&stuff->planeMask, n); + swapl(&stuff->shmseg, n); + swapl(&stuff->offset, n); + return ProcShmGetImage(client); +} + +static int +SProcShmCreatePixmap(ClientPtr client) +{ + int n; + REQUEST(xShmCreatePixmapReq); + swaps(&stuff->length, n); + REQUEST_SIZE_MATCH(xShmCreatePixmapReq); + swapl(&stuff->pid, n); + swapl(&stuff->drawable, n); + swaps(&stuff->width, n); + swaps(&stuff->height, n); + swapl(&stuff->shmseg, n); + swapl(&stuff->offset, n); + return ProcShmCreatePixmap(client); +} + +static int +SProcShmDispatch (ClientPtr client) +{ + REQUEST(xReq); + switch (stuff->data) + { + case X_ShmQueryVersion: + return SProcShmQueryVersion(client); + case X_ShmAttach: + return SProcShmAttach(client); + case X_ShmDetach: + return SProcShmDetach(client); + case X_ShmPutImage: + return SProcShmPutImage(client); + case X_ShmGetImage: + return SProcShmGetImage(client); + case X_ShmCreatePixmap: + return SProcShmCreatePixmap(client); + default: + return BadRequest; + } +} + +void +ShmExtensionInit(INITARGS) +{ + ExtensionEntry *extEntry; + int i; + +#ifdef MUST_CHECK_FOR_SHM_SYSCALL + if (!CheckForShmSyscall()) + { + ErrorF("MIT-SHM extension disabled due to lack of kernel support\n"); + return; + } +#endif + + if (!ShmRegisterPrivates()) + return; + + sharedPixmaps = xFalse; + { + sharedPixmaps = xTrue; + for (i = 0; i < screenInfo.numScreens; i++) + { + ShmScrPrivateRec *screen_priv = ShmInitScreenPriv(screenInfo.screens[i]); + if (!screen_priv->shmFuncs) + screen_priv->shmFuncs = &miFuncs; + if (!screen_priv->shmFuncs->CreatePixmap) + sharedPixmaps = xFalse; + } + if (sharedPixmaps) + for (i = 0; i < screenInfo.numScreens; i++) + { + ShmScrPrivateRec *screen_priv = ShmGetScreenPriv(screenInfo.screens[i]); + screen_priv->destroyPixmap = screenInfo.screens[i]->DestroyPixmap; + screenInfo.screens[i]->DestroyPixmap = ShmDestroyPixmap; + } + } + ShmSegType = CreateNewResourceType(ShmDetachSegment, "ShmSeg"); + if (ShmSegType && + (extEntry = AddExtension(SHMNAME, ShmNumberEvents, ShmNumberErrors, + ProcShmDispatch, SProcShmDispatch, + ShmResetProc, StandardMinorOpcode))) + { + ShmReqCode = (unsigned char)extEntry->base; + ShmCompletionCode = extEntry->eventBase; + BadShmSegCode = extEntry->errorBase; + SetResourceTypeErrorValue(ShmSegType, BadShmSegCode); + EventSwapVector[ShmCompletionCode] = (EventSwapPtr) SShmCompletionEvent; + } +} |