Changeset 98002 in vbox for trunk/src/VBox/Runtime/common

Timestamp:

Jan 5, 2023 2:08:30 PM (2 years ago)

Author:

vboxsync

Message:

Runtime/ldr/ldrELFRelocatable: Fix groking ELF binaries with DT_DEBUG dynamic sections, DT_DEBUG is filled in by the dynamic linker and 0 for raw binary images not being executed. The pointer can also be anywhere in userspace (most likely a regression from r139569)

File:

• trunk/src/VBox/Runtime/common/ldr/ldrELFRelocatable.cpp.h (modified) (1 diff)

trunk/src/VBox/Runtime/common/ldr/ldrELFRelocatable.cpp.h

@@ -2758 +2758 @@
                 break;
             case DT_DEBUG:
-                LOG_VALIDATE_PTR_RET("DT_DEBUG");
+                /*
+                 * DT_DEBUG is filled in by the dynamic linker to point a debugger to the head of the link map,
+                 * it can point anywhere in userspace. For binaries not being executed it will be 0,
+                 * so there is nothing we can validate here (and it is not required as we don't use
+                 * this dynamic section). See https://ypl.coffee/dl-resolve-full-relro/ for more information.
+                 */
                 break;
             case DT_TEXTREL: