elfutils: fix elf_cvt_gnuhash

The 'dest' and 'src' can be same, we need to save the value of src32[2]
before swaping it.

(From OE-Core rev: b7936bacf0cc89bdda6722d317274bd4a3af840a)

Signed-off-by: Roy Li <rongqing.li@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 29 insertions, 0 deletions

diff --git a/meta/recipes-devtools/elfutils/elfutils/Fix_elf_cvt_gunhash.patch b/meta/recipes-devtools/elfutils/elfutils/Fix_elf_cvt_gunhash.patch
new file mode 100644
index 0000000000..374cba555e
--- /dev/null
+++ b/meta/recipes-devtools/elfutils/elfutils/Fix_elf_cvt_gunhash.patch
@@ -0,0 +1,29 @@
+Fix elf_cvt_gunhash if dest and src are same.
+
+Upstream-status: Pending
+
+The 'dest' and 'src' can be same, we need to save the value of src32[2]
+before swaping it.
+
+Signed-off-by: Baoshan Pang <BaoShan.Pang@windriver.com>
+diff --git a/libelf/gnuhash_xlate.h b/libelf/gnuhash_xlate.h
+index 6faf113..04d9ca1 100644
+--- a/libelf/gnuhash_xlate.h
++++ b/libelf/gnuhash_xlate.h
+@@ -40,6 +40,7 @@ elf_cvt_gnuhash (void *dest, const void *src, size_t len, int encode)
+      words.  We must detangle them here.   */
+   Elf32_Word *dest32 = dest;
+   const Elf32_Word *src32 = src;
++  Elf32_Word save_src32_2 = src32[2]; // dest could be equal to src
+ 
+   /* First four control words, 32 bits.  */
+   for (unsigned int cnt = 0; cnt < 4; ++cnt)
+@@ -50,7 +51,7 @@ elf_cvt_gnuhash (void *dest, const void *src, size_t len, int encode)
+       len -= 4;
+     }
+ 
+-  Elf32_Word bitmask_words = encode ? src32[2] : dest32[2];
++  Elf32_Word bitmask_words = encode ? save_src32_2 : dest32[2];
+ 
+   /* Now the 64 bit words.  */
+   Elf64_Xword *dest64 = (Elf64_Xword *) &dest32[4];