elfutils: Fix size passed to snprintf for invalid sh_name case

Following build error will appear on Fedora18.
nm.c: In function 'show_symbols_sysv':
nm.c:756:27: error: argument to 'sizeof' in 'snprintf' call is the same expression as the destination; did you mean to provide an explicit length? [-Werror=sizeof-pointer-memaccess]
    snprintf (name, sizeof name, "[invalid sh_name %#" PRIx32 "]",
                           ^

(From OE-Core rev: 61010972284cc53cfc7958a9f6422e3fe74fcc0e)

Signed-off-by: Zhenhua Luo <zhenhua.luo@freescale.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 27 insertions, 0 deletions

diff --git a/meta/recipes-devtools/elfutils/elfutils/nm-Fix-size-passed-to-snprintf-for-invalid-sh_name-case.patch b/meta/recipes-devtools/elfutils/elfutils/nm-Fix-size-passed-to-snprintf-for-invalid-sh_name-case.patch
new file mode 100644
index 0000000000..2b5dad368a
--- /dev/null
+++ b/meta/recipes-devtools/elfutils/elfutils/nm-Fix-size-passed-to-snprintf-for-invalid-sh_name-case.patch
@@ -0,0 +1,27 @@
+Upstream-Status: Backport
+
+nm: Fix size passed to snprintf for invalid sh_name case.
+native build failed as following on Fedora18:
+nm.c: In function 'show_symbols_sysv':
+nm.c:756:27: error: argument to 'sizeof' in 'snprintf' call is the same expression as the destination; did you mean to provide an explicit length? [-Werror=sizeof-pointer-memaccess]
+    snprintf (name, sizeof name, "[invalid sh_name %#" PRIx32 "]",
+                           ^
+
+The original commit is http://git.fedorahosted.org/cgit/elfutils.git/commit/src/nm.c?id=57bd66cabf6e6b9ecf622cdbf350804897a8df58
+
+Signed-off-by: Zhenhua Luo <zhenhua.luo@freescale.com>
+
+--- elfutils-0.148/src/nm.c.org 2013-03-11 22:36:11.000000000 -0500
++++ elfutils-0.148/src/nm.c     2013-03-11 22:46:09.000000000 -0500
+@@ -752,8 +752,9 @@
+                               gelf_getshdr (scn, &shdr_mem)->sh_name);
+       if (unlikely (name == NULL))
+        {
+-         name = alloca (sizeof "[invalid sh_name 0x12345678]");
+-         snprintf (name, sizeof name, "[invalid sh_name %#" PRIx32 "]",
++         const size_t bufsz = sizeof "[invalid sh_name 0x12345678]";
++         name = alloca (bufsz);
++         snprintf (name, bufsz, "[invalid sh_name %#" PRIx32 "]",
+                    gelf_getshdr (scn, &shdr_mem)->sh_name);
+        }
+       scnnames[elf_ndxscn (scn)] = name;