Changeset 43486 in vbox

Timestamp:

Oct 1, 2012 11:50:44 AM (12 years ago)

Author:

vboxsync

Message:

vga/3d: allow passing command VRAM offset with CrHGSMI command

File:

• trunk/src/VBox/Devices/Graphics/DevVGA_VDMA.cpp (modified) (3 diffs)

trunk/src/VBox/Devices/Graphics/DevVGA_VDMA.cpp

@@ -238 +238 @@
     int rc = VINF_NOT_SUPPORTED;
 
+    cbDmaCmd = pCmdDr->cbBuf;
+
     if (pCmdDr->fFlags & VBOXVDMACBUF_FLAG_BUF_FOLLOWS_DR)
     {
@@ -246 +248 @@
         }
 
-        cbDmaCmd = pCmdDr->cbBuf;
         if (cbDmaCmd < cbCmdDr - sizeof (*pCmdDr) - VBOXVDMACMD_HEADER_SIZE())
         {
@@ -254 +255 @@
 
         pDmaCmd = VBOXVDMACBUF_DR_TAIL(pCmdDr, VBOXVDMACMD);
+    }
+    else if (pCmdDr->fFlags & VBOXVDMACBUF_FLAG_BUF_VRAM_OFFSET)
+    {
+        VBOXVIDEOOFFSET offBuf = pCmdDr->Location.offVramBuf;
+        if (offBuf + cbDmaCmd > pVdma->pVGAState->vram_size)
+        {
+            AssertMsgFailed(("invalid command buffer data from offset!"));
+            return VERR_INVALID_PARAMETER;
+        }
+        pDmaCmd = (VBOXVDMACMD*)(pvRam + offBuf);
     }