glibc & eglibc: fix mips DT_MIPS_RLD_MAP checking

On mips target, binutils currently sets DT_MIPS_RLD_MAP to 0 in dynamic
section if a --version-script sets _RLD_MAP to local. This is apparently
a binutils bug, but libc shouldn't segfault in this case.

Add sanity check on the entry to avoid segfault, fixes [BUGID #287].

Signed-off-by: Qing He <qing.he@intel.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/meta/recipes-core/glibc/glibc-2.10.1/mips-rld-map-check.patch b/meta/recipes-core/glibc/glibc-2.10.1/mips-rld-map-check.patch
new file mode 100644
index 0000000000..ed08d7e301
--- /dev/null
+++ b/meta/recipes-core/glibc/glibc-2.10.1/mips-rld-map-check.patch
@@ -0,0 +1,21 @@
+On mips target, binutils currently sets DT_MIPS_RLD_MAP to 0 in dynamic
+section if a --version-script sets _RLD_MAP to local. This is apparently
+a binutils bug, but libc shouldn't segfault in this case.
+
+see also: http://sourceware.org/bugilla/show_bug.cgi?id=11615
+
+9/19/2010 - added by Qing He <qing.he@intel.com>
+---
+diff -ru glibc-2.10.1.orig/ports/sysdeps/mips/dl-machine.h glibc-2.10.1/ports/sysdeps/mips/dl-machine.h
+--- glibc-2.10.1.orig/ports/sysdeps/mips/dl-machine.h   2009-05-16 16:36:20.000000000 +0800
++++ glibc-2.10.1/ports/sysdeps/mips/dl-machine.h        2010-09-19 09:11:53.000000000 +0800
+@@ -70,7 +70,8 @@
+ /* If there is a DT_MIPS_RLD_MAP entry in the dynamic section, fill it in
+    with the run-time address of the r_debug structure  */
+ #define ELF_MACHINE_DEBUG_SETUP(l,r) \
+-do { if ((l)->l_info[DT_MIPS (RLD_MAP)]) \
++do { if ((l)->l_info[DT_MIPS (RLD_MAP)] && \
++         (l)->l_info[DT_MIPS (RLD_MAP)]->d_un.d_ptr) \
+        *(ElfW(Addr) *)((l)->l_info[DT_MIPS (RLD_MAP)]->d_un.d_ptr) = \
+        (ElfW(Addr)) (r); \
+    } while (0)