diff options
Diffstat (limited to 'xorg-server/Xext/shm.c')
| -rw-r--r-- | xorg-server/Xext/shm.c | 2557 |
1 files changed, 1279 insertions, 1278 deletions
diff --git a/xorg-server/Xext/shm.c b/xorg-server/Xext/shm.c index 52e117940..d3393bfed 100644 --- a/xorg-server/Xext/shm.c +++ b/xorg-server/Xext/shm.c @@ -1,1278 +1,1279 @@ -/************************************************************ - -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> - -/* 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; - -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; -int ShmCompletionCode; -int BadShmSegCode; -RESTYPE ShmSegType; -static ShmDescPtr Shmsegs; -static Bool sharedPixmaps; -static ShmFuncsPtr shmFuncs[MAXSCREENS]; -static DestroyPixmapProcPtr destroyPixmap[MAXSCREENS]; -static int shmPixmapPrivateIndex; -static DevPrivateKey shmPixmapPrivate = &shmPixmapPrivateIndex; -static ShmFuncs miFuncs = {NULL, NULL}; -static ShmFuncs fbFuncs = {fbShmCreatePixmap, NULL}; - -#define VERIFY_SHMSEG(shmseg,shmdesc,client) \ -{ \ - int rc; \ - rc = dixLookupResourceByType((pointer *)&(shmdesc), shmseg, ShmSegType, \ - client, DixReadAccess); \ - if (rc != Success) \ - return (rc == BadValue) ? BadShmSegCode : 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 - -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; - { - sharedPixmaps = xTrue; - for (i = 0; i < screenInfo.numScreens; i++) - { - if (!shmFuncs[i]) - shmFuncs[i] = &miFuncs; - if (!shmFuncs[i]->CreatePixmap) - sharedPixmaps = xFalse; - } - 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] = NULL; - } -} - -void -ShmRegisterFuncs(ScreenPtr pScreen, ShmFuncsPtr funcs) -{ - shmFuncs[pScreen->myNum] = funcs; -} - -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; -} - -void -ShmRegisterFbFuncs(ScreenPtr pScreen) -{ - shmFuncs[pScreen->myNum] = &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 = SHM_MAJOR_VERSION; - rep.minorVersion = 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 (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; - } - #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 = 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; -#ifndef _MSC_VER - shmdt(shmdesc->addr); -#endif - 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); -} - -/* - * 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; - - 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); -} - -#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 == BadValue) ? BadGC : 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 - 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); - } - - 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 */ - 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; 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 = 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 - 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.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; 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); - 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; - } -} +/************************************************************
+
+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;
+
+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;
+int ShmCompletionCode;
+int BadShmSegCode;
+RESTYPE ShmSegType;
+static ShmDescPtr Shmsegs;
+static Bool sharedPixmaps;
+static ShmFuncsPtr shmFuncs[MAXSCREENS];
+static DestroyPixmapProcPtr destroyPixmap[MAXSCREENS];
+static int shmPixmapPrivateIndex;
+static DevPrivateKey shmPixmapPrivate = &shmPixmapPrivateIndex;
+static ShmFuncs miFuncs = {NULL, NULL};
+static ShmFuncs fbFuncs = {fbShmCreatePixmap, NULL};
+
+#define VERIFY_SHMSEG(shmseg,shmdesc,client) \
+{ \
+ int rc; \
+ rc = dixLookupResourceByType((pointer *)&(shmdesc), shmseg, ShmSegType, \
+ client, DixReadAccess); \
+ if (rc != Success) \
+ return (rc == BadValue) ? BadShmSegCode : 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
+
+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;
+ {
+ sharedPixmaps = xTrue;
+ for (i = 0; i < screenInfo.numScreens; i++)
+ {
+ if (!shmFuncs[i])
+ shmFuncs[i] = &miFuncs;
+ if (!shmFuncs[i]->CreatePixmap)
+ sharedPixmaps = xFalse;
+ }
+ 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] = NULL;
+ }
+}
+
+void
+ShmRegisterFuncs(ScreenPtr pScreen, ShmFuncsPtr funcs)
+{
+ shmFuncs[pScreen->myNum] = funcs;
+}
+
+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;
+}
+
+void
+ShmRegisterFbFuncs(ScreenPtr pScreen)
+{
+ shmFuncs[pScreen->myNum] = &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 (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;
+ }
+ #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 = 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;
+#ifndef _MSC_VER
+ shmdt(shmdesc->addr);
+#endif
+ 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);
+}
+
+/*
+ * 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;
+
+ 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);
+}
+
+#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 == BadValue) ? BadGC : 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 - 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);
+ }
+
+ 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 */
+ 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; 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 = 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
+ 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.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; 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);
+ 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;
+ }
+}
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