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From 04fb3f65ec186df5231dd0c21780a55dcc03c868 Mon Sep 17 00:00:00 2001
From: Hongxu Jia <hongxu.jia@windriver.com>
Date: Tue, 15 Aug 2017 17:17:20 +0800
Subject: [PATCH 3/7] fixheadercheck
For some binaries we can get a invalid section alignment, for example if
sh_align = 1 and sh_addralign is 0. In the case of a zero size section
like
".note.GNU-stack", this is irrelavent as far as I can tell and we
shouldn't
error in this case.
RP 2014/6/11
Upstream-Status: Pending
Rebase to 0.170
Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
---
libelf/elf32_updatenull.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/libelf/elf32_updatenull.c b/libelf/elf32_updatenull.c
index 3e9ef61..5351518 100644
--- a/libelf/elf32_updatenull.c
+++ b/libelf/elf32_updatenull.c
@@ -339,8 +339,8 @@ __elfw2(LIBELFBITS,updatenull_wrlock) (Elf *elf, int *change_bop, size_t shnum)
we test for the alignment of the section being large
enough for the largest alignment required by a data
block. */
- if (unlikely (! powerof2 (shdr->sh_addralign))
- || unlikely ((shdr->sh_addralign ?: 1) < sh_align))
+ if (shdr->sh_size && (unlikely (! powerof2 (shdr->sh_addralign))
+ || unlikely ((shdr->sh_addralign ?: 1) < sh_align)))
{
__libelf_seterrno (ELF_E_INVALID_ALIGN);
return -1;
--
2.7.4
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