Andrew Geissler | 90fd73c | 2021-03-05 15:25:55 -0600 | [diff] [blame] | 1 | From 1643d793761216252bb654e28aaa5b8eb1536bca Mon Sep 17 00:00:00 2001 |
Brad Bishop | d7bf8c1 | 2018-02-25 22:55:05 -0500 | [diff] [blame] | 2 | From: Hongxu Jia <hongxu.jia@windriver.com> |
| 3 | Date: Tue, 15 Aug 2017 17:13:59 +0800 |
Brad Bishop | 1932369 | 2019-04-05 15:28:33 -0400 | [diff] [blame] | 4 | Subject: [PATCH] Fix elf_cvt_gunhash if dest and src are same. |
Brad Bishop | d7bf8c1 | 2018-02-25 22:55:05 -0500 | [diff] [blame] | 5 | |
| 6 | Upstream-Status: Pending |
| 7 | |
| 8 | The 'dest' and 'src' can be same, we need to save the value of src32[2] |
| 9 | before swaping it. |
| 10 | |
| 11 | Signed-off-by: Baoshan Pang <BaoShan.Pang@windriver.com> |
| 12 | |
| 13 | Rebase to 0.170 |
| 14 | Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com> |
Brad Bishop | 1932369 | 2019-04-05 15:28:33 -0400 | [diff] [blame] | 15 | |
Brad Bishop | d7bf8c1 | 2018-02-25 22:55:05 -0500 | [diff] [blame] | 16 | --- |
| 17 | libelf/gnuhash_xlate.h | 3 ++- |
| 18 | 1 file changed, 2 insertions(+), 1 deletion(-) |
| 19 | |
| 20 | diff --git a/libelf/gnuhash_xlate.h b/libelf/gnuhash_xlate.h |
| 21 | index 6faf113..04d9ca1 100644 |
| 22 | --- a/libelf/gnuhash_xlate.h |
| 23 | +++ b/libelf/gnuhash_xlate.h |
| 24 | @@ -40,6 +40,7 @@ elf_cvt_gnuhash (void *dest, const void *src, size_t len, int encode) |
| 25 | words. We must detangle them here. */ |
| 26 | Elf32_Word *dest32 = dest; |
| 27 | const Elf32_Word *src32 = src; |
| 28 | + Elf32_Word save_src32_2 = src32[2]; // dest could be equal to src |
| 29 | |
| 30 | /* First four control words, 32 bits. */ |
| 31 | for (unsigned int cnt = 0; cnt < 4; ++cnt) |
| 32 | @@ -50,7 +51,7 @@ elf_cvt_gnuhash (void *dest, const void *src, size_t len, int encode) |
| 33 | len -= 4; |
| 34 | } |
| 35 | |
| 36 | - Elf32_Word bitmask_words = encode ? src32[2] : dest32[2]; |
| 37 | + Elf32_Word bitmask_words = encode ? save_src32_2 : dest32[2]; |
| 38 | |
| 39 | /* Now the 64 bit words. */ |
| 40 | Elf64_Xword *dest64 = (Elf64_Xword *) &dest32[4]; |