/************************************************************ 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 #endif #include #include #include #include #include #define NEED_REPLIES #define NEED_EVENTS #include #include #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" #define _XSHM_SERVER_ #include #include /* Needed for Solaris cross-zone shared memory extension */ #ifdef HAVE_SHMCTL64 #include #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; static void miShmPutImage(XSHM_PUT_IMAGE_ARGS); 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 DISPATCH_PROC(ProcShmAttach); static DISPATCH_PROC(ProcShmCreatePixmap); static DISPATCH_PROC(ProcShmDetach); static DISPATCH_PROC(ProcShmDispatch); static DISPATCH_PROC(ProcShmGetImage); static DISPATCH_PROC(ProcShmPutImage); static DISPATCH_PROC(ProcShmQueryVersion); static DISPATCH_PROC(SProcShmAttach); static DISPATCH_PROC(SProcShmCreatePixmap); static DISPATCH_PROC(SProcShmDetach); static DISPATCH_PROC(SProcShmDispatch); static DISPATCH_PROC(SProcShmGetImage); static DISPATCH_PROC(SProcShmPutImage); static DISPATCH_PROC(SProcShmQueryVersion); static unsigned char ShmReqCode; _X_EXPORT int ShmCompletionCode; _X_EXPORT int BadShmSegCode; _X_EXPORT RESTYPE ShmSegType; static ShmDescPtr Shmsegs; static Bool sharedPixmaps; static int pixmapFormat; static int shmPixFormat[MAXSCREENS]; static ShmFuncsPtr shmFuncs[MAXSCREENS]; static DestroyPixmapProcPtr destroyPixmap[MAXSCREENS]; static DevPrivateKey shmPixmapPrivate = &shmPixmapPrivate; static ShmFuncs miFuncs = {NULL, miShmPutImage}; static ShmFuncs fbFuncs = {fbShmCreatePixmap, fbShmPutImage}; #define VERIFY_SHMSEG(shmseg,shmdesc,client) \ { \ shmdesc = (ShmDescPtr)LookupIDByType(shmseg, ShmSegType); \ if (!shmdesc) \ { \ client->errorValue = shmseg; \ return BadShmSegCode; \ } \ } #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 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, (struct shmid_ds *)NULL); } else { /* Allocation failed */ badSysCall = TRUE; } signal(SIGSYS, oldHandler); return(!badSysCall); } #define MUST_CHECK_FOR_SHM_SYSCALL #endif 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 sharedPixmaps = xFalse; pixmapFormat = 0; { sharedPixmaps = xTrue; pixmapFormat = shmPixFormat[0]; for (i = 0; i < screenInfo.numScreens; i++) { if (!shmFuncs[i]) shmFuncs[i] = &miFuncs; if (!shmFuncs[i]->CreatePixmap) sharedPixmaps = xFalse; if (shmPixFormat[i] && (shmPixFormat[i] != pixmapFormat)) { sharedPixmaps = xFalse; pixmapFormat = 0; } } if (!pixmapFormat) pixmapFormat = ZPixmap; if (sharedPixmaps) for (i = 0; i < screenInfo.numScreens; i++) { destroyPixmap[i] = screenInfo.screens[i]->DestroyPixmap; screenInfo.screens[i]->DestroyPixmap = ShmDestroyPixmap; } } ShmSegType = CreateNewResourceType(ShmDetachSegment); if (ShmSegType && (extEntry = AddExtension(SHMNAME, ShmNumberEvents, ShmNumberErrors, ProcShmDispatch, SProcShmDispatch, ShmResetProc, StandardMinorOpcode))) { ShmReqCode = (unsigned char)extEntry->base; ShmCompletionCode = extEntry->eventBase; BadShmSegCode = extEntry->errorBase; EventSwapVector[ShmCompletionCode] = (EventSwapPtr) SShmCompletionEvent; } } /*ARGSUSED*/ static void ShmResetProc(ExtensionEntry *extEntry) { int i; for (i = 0; i < MAXSCREENS; i++) { shmFuncs[i] = (ShmFuncsPtr)NULL; shmPixFormat[i] = 0; } } _X_EXPORT void ShmRegisterFuncs(ScreenPtr pScreen, ShmFuncsPtr funcs) { shmFuncs[pScreen->myNum] = funcs; } _X_EXPORT void ShmSetPixmapFormat(ScreenPtr pScreen, int format) { shmPixFormat[pScreen->myNum] = format; } static Bool ShmDestroyPixmap (PixmapPtr pPixmap) { ScreenPtr pScreen = pPixmap->drawable.pScreen; Bool ret; if (pPixmap->refcnt == 1) { ShmDescPtr shmdesc; shmdesc = (ShmDescPtr)dixLookupPrivate(&pPixmap->devPrivates, shmPixmapPrivate); if (shmdesc) ShmDetachSegment ((pointer) shmdesc, pPixmap->drawable.id); } pScreen->DestroyPixmap = destroyPixmap[pScreen->myNum]; ret = (*pScreen->DestroyPixmap) (pPixmap); destroyPixmap[pScreen->myNum] = pScreen->DestroyPixmap; pScreen->DestroyPixmap = ShmDestroyPixmap; return ret; } _X_EXPORT void ShmRegisterFbFuncs(ScreenPtr pScreen) { shmFuncs[pScreen->myNum] = &fbFuncs; } static int ProcShmQueryVersion(ClientPtr client) { xShmQueryVersionReply rep; int n; REQUEST_SIZE_MATCH(xShmQueryVersionReq); rep.type = X_Reply; rep.length = 0; rep.sequenceNumber = client->sequence; rep.sharedPixmaps = sharedPixmaps; rep.pixmapFormat = pixmapFormat; rep.majorVersion = SHM_MAJOR_VERSION; rep.minorVersion = SHM_MINOR_VERSION; rep.uid = geteuid(); rep.gid = getegid(); 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 (client->noClientException); } /* * 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; } /* 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; } } if (gidset) { /* Check the group */ 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; } } } /* Otherwise, check everyone else */ mask = S_IROTH; if (!readonly) { mask |= S_IWOTH; } return (SHMPERM_MODE(perm) & mask) == mask ? 0 : -1; } 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 = (ShmDescPtr) xalloc(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)) { xfree(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); xfree(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(client->noClientException); } /*ARGSUSED*/ static int ShmDetachSegment(pointer value, /* must conform to DeleteType */ XID shmseg) { ShmDescPtr shmdesc = (ShmDescPtr)value; ShmDescPtr *prev; if (--shmdesc->refcnt) return TRUE; shmdt(shmdesc->addr); for (prev = &Shmsegs; *prev != shmdesc; prev = &(*prev)->next) ; *prev = shmdesc->next; xfree(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(client->noClientException); } static void miShmPutImage(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 pmap; GCPtr putGC; putGC = GetScratchGC(depth, dst->pScreen); if (!putGC) return; pmap = (*dst->pScreen->CreatePixmap)(dst->pScreen, sw, sh, depth, CREATE_PIXMAP_USAGE_SCRATCH); if (!pmap) { FreeScratchGC(putGC); return; } ValidateGC((DrawablePtr)pmap, putGC); (*putGC->ops->PutImage)((DrawablePtr)pmap, putGC, depth, -sx, -sy, w, h, 0, (format == XYPixmap) ? XYPixmap : ZPixmap, data); FreeScratchGC(putGC); if (format == XYBitmap) (void)(*pGC->ops->CopyPlane)((DrawablePtr)pmap, dst, pGC, 0, 0, sw, sh, dx, dy, 1L); else (void)(*pGC->ops->CopyArea)((DrawablePtr)pmap, dst, pGC, 0, 0, sw, sh, dx, dy); (*pmap->drawable.pScreen->DestroyPixmap)(pmap); } _X_EXPORT void fbShmPutImage(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) { if ((format == ZPixmap) || (depth == 1)) { PixmapPtr pPixmap; pPixmap = GetScratchPixmapHeader(dst->pScreen, w, h, depth, BitsPerPixel(depth), PixmapBytePad(w, depth), (pointer)data); if (!pPixmap) return; if (format == XYBitmap) (void)(*pGC->ops->CopyPlane)((DrawablePtr)pPixmap, dst, pGC, sx, sy, sw, sh, dx, dy, 1L); else (void)(*pGC->ops->CopyArea)((DrawablePtr)pPixmap, dst, pGC, sx, sy, sw, sh, dx, dy); FreeScratchPixmapHeader(pPixmap); } else miShmPutImage(dst, pGC, depth, format, w, h, sx, sy, sw, sh, dx, dy, data); } #ifdef PANORAMIX static int ProcPanoramiXShmPutImage(ClientPtr client) { int j, result = 0, orig_x, orig_y; PanoramiXRes *draw, *gc; Bool sendEvent, isRoot; REQUEST(xShmPutImageReq); REQUEST_SIZE_MATCH(xShmPutImageReq); if(!(draw = (PanoramiXRes *)SecurityLookupIDByClass( client, stuff->drawable, XRC_DRAWABLE, DixWriteAccess))) return BadDrawable; if(!(gc = (PanoramiXRes *)SecurityLookupIDByType( client, stuff->gc, XRT_GC, DixReadAccess))) return BadGC; 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 - panoramiXdataPtr[j].x; stuff->dstY = orig_y - panoramiXdataPtr[j].y; } result = ProcShmPutImage(client); if(result != client->noClientException) break; } return(result); } static int ProcPanoramiXShmGetImage(ClientPtr client) { PanoramiXRes *draw; DrawablePtr drawables[MAXSCREENS]; 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); } if(!(draw = (PanoramiXRes *)SecurityLookupIDByClass( client, stuff->drawable, XRC_DRAWABLE, DixWriteAccess))) return BadDrawable; 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 */ panoramiXdataPtr[0].x + pDraw->x + x < 0 || panoramiXdataPtr[0].x + pDraw->x + x + w > PanoramiXPixWidth || panoramiXdataPtr[0].y + pDraw->y + y < 0 || panoramiXdataPtr[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[0] = pDraw; for(i = 1; i < PanoramiXNumScreens; i++) { rc = dixLookupDrawable(drawables+i, draw->info[i].id, client, 0, DixReadAccess); if (rc != Success) 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; } } } 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(client->noClientException); } 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; ipScreen->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 = (PanoramiXRes *) xalloc(sizeof(PanoramiXRes)))) return BadAlloc; newPix->type = XRT_PIXMAP; newPix->u.pix.shared = TRUE; newPix->info[0].id = stuff->pid; for(j = 1; j < PanoramiXNumScreens; j++) newPix->info[j].id = FakeClientID(client->index); result = (client->noClientException); FOR_NSCREENS(j) { pScreen = screenInfo.screens[j]; pMap = (*shmFuncs[j]->CreatePixmap)(pScreen, stuff->width, stuff->height, stuff->depth, shmdesc->addr + stuff->offset); if (pMap) { dixSetPrivate(&pMap->devPrivates, shmPixmapPrivate, 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); } xfree(newPix); } else AddResource(stuff->pid, XRT_PIXMAP, newPix); return result; } #endif 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 (*shmFuncs[pDraw->pScreen->myNum]->PutImage)( 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.sequenceNumber = client->sequence; ev.minorEvent = X_ShmPutImage; ev.majorEvent = ShmReqCode; ev.shmseg = stuff->shmseg; ev.offset = stuff->offset; WriteEventsToClient(client, 1, (xEvent *) &ev); } return (client->noClientException); } 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(client->noClientException); } 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; 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; ipScreen->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); pMap = (*shmFuncs[pDraw->pScreen->myNum]->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, shmPixmapPrivate, shmdesc); shmdesc->refcnt++; pMap->drawable.serialNumber = NEXT_SERIAL_NUMBER; pMap->drawable.id = stuff->pid; if (AddResource(stuff->pid, RT_PIXMAP, (pointer)pMap)) { return(client->noClientException); } 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; } }