+ if (MSYMBOL_SIZE (msym) != ptr_size)
+ return -1;
+
+ /* POINTER_ADDRESS is a location where the `_dl_auxv' variable resides.
+ DATA_ADDRESS is the inferior value present in `_dl_auxv', therefore the
+ real inferior AUXV address. */
+
+ pointer_address = SYMBOL_VALUE_ADDRESS (msym);
+
+ /* The location of the _dl_auxv symbol may no longer be correct if
+ ld.so runs at a different address than the one present in the file.
+ This is very common case - for unprelinked ld.so or with a PIE executable.
+ PIE executable forces random address even for libraries already being
+ prelinked to some address. PIE executables themselves are never prelinked
+ even on prelinked systems. Prelinking of a PIE executable would block
+ their purpose of randomizing load of everything including the executable.
+
+ If the memory read fails, return -1 to fallback on another mechanism for
+ retrieving the AUXV.
+
+ In most cases of a PIE running under valgrind there is no way to find
+ out the base addresses of any of ld.so, executable or AUXV as everything
+ is randomized and /proc information is not relevant for the virtual
+ executable running under valgrind. We think that we might need a valgrind
+ extension to make it work. This is PR 11440. */
+
+ if (target_read_memory (pointer_address, ptr_buf, ptr_size) != 0)
+ return -1;
+
+ data_address = extract_typed_address (ptr_buf, ptr_type);
+
+ /* Possibly still not initialized such as during an inferior startup. */
+ if (data_address == 0)
+ return -1;
+
+ data_address += offset;
+
+ if (writebuf != NULL)