Changeset 91633 in vbox

Timestamp:

Oct 8, 2021 8:42:00 AM (3 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

147358

Message:

IPRT/dbg.h,dbgkrnlinfo-r0drv-nt.cpp: Added a few pseudo symbols to the NT kernel debug info provider to expose some basic module info (simpler than adding dedicated APIs for each of them). bugref:10118

Location:

trunk

Files:

• include/iprt/dbg.h (modified) (2 diffs)
• src/VBox/Runtime/r0drv/nt/dbgkrnlinfo-r0drv-nt.cpp (modified) (1 diff)

trunk/include/iprt/dbg.h

@@ -1962 +1962 @@
  *
  * @param   hKrnlInfo       The kernel info handle.
- * @param   pszModule       Reserved for future extensions. Pass NULL.
+ * @param   pszModule       The name of the module to search, pass NULL to
+ *                          search the default kernel module(s).
  * @param   pszSymbol       The C name of the symbol.
+ *                          On Windows NT there are the following special symbols:
+ *                              - __ImageBase: The base address of the module.
+ *                              - __ImageSize: The size of the module.
+ *                              - __ImageNtHdrs: Address of the NT headers.
  * @param   ppvSymbol       Where to return the symbol value, passing NULL is
  *                          OK. This may be modified even on failure, in
@@ -1980 +1985 @@
  *          or something.
  * @param   hKrnlInfo       The kernel info handle.
- * @param   pszModule       Reserved for future extensions. Pass NULL.
+ * @param   pszModule       The name of the module to search, pass NULL to
+ *                          search the default kernel module(s).
  * @param   pszSymbol       The C name of the symbol.
+ *                          On Windows NT there are the following special symbols:
+ *                              - __ImageBase: The base address of the module.
+ *                              - __ImageSize: The size of the module.
+ *                              - __ImageNtHdrs: Address of the NT headers.
  * @sa      RTR0DbgKrnlInfoQuerySymbol, RTLdrGetSymbol
  */

trunk/src/VBox/Runtime/r0drv/nt/dbgkrnlinfo-r0drv-nt.cpp

@@ -170 +170 @@
     if (pModInfo->fOkay)
     {
+        /*
+         * Pseudo symbols:
+         */
+        if (   pszSymbol[0] == '_'
+            && pszSymbol[1] == '_'
+            && pszSymbol[2] == 'I')
+        {
+            if (strcmp(pszSymbol, "__ImageBase") == 0)
+            {
+                *ppvSymbol = (void *)pModInfo->pbImageBase;
+                return VINF_SUCCESS;
+            }
+            if (strcmp(pszSymbol, "__ImageSize") == 0)
+            {
+                *ppvSymbol = (void *)(uintptr_t)pModInfo->cbImage;
+                return VINF_SUCCESS;
+            }
+            if (strcmp(pszSymbol, "__ImageNtHdrs") == 0)
+            {
+                *ppvSymbol = pModInfo->pNtHdrs;
+                return VINF_SUCCESS;
+            }
+        }
+
         /*
          * Binary search.