GNU bug report logs - #20614
Segmentation fault when building on Power8 Little Endian

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Package: emacs;

Reported by: Petr Hracek <phracek <at> redhat.com>

Date: Wed, 20 May 2015 07:59:01 UTC

Severity: important

Tags: patch

Done: Lars Ingebrigtsen <larsi <at> gnus.org>

Bug is archived. No further changes may be made.

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From: YAMAMOTO Mitsuharu <mituharu <at> math.s.chiba-u.ac.jp>
To: Petr Hracek <phracek <at> redhat.com>
Cc: Eli Zaretskii <eliz <at> gnu.org>, 20614 <at> debbugs.gnu.org, jcapik <at> redhat.com
Subject: bug#20614: Segmentation fault when building on Power8 Little Endian
Date: Wed, 07 Oct 2015 19:56:00 +0900

What happens if you apply the following patch?

				     YAMAMOTO Mitsuharu
				mituharu <at> math.s.chiba-u.ac.jp

diff --git a/src/unexelf.c b/src/unexelf.c
index 59e2725..0d67b99 100644
--- a/src/unexelf.c
+++ b/src/unexelf.c
@@ -730,7 +730,14 @@ unexec (const char *new_name, const char *old_name)
   old_plt_index = find_section (".plt", old_section_names,
 				old_name, old_file_h, old_section_h, 1);
   if (old_plt_index != -1)
-    if (OLD_SECTION_H (old_plt_index).sh_type != SHT_NOBITS)
+    if (OLD_SECTION_H (old_plt_index).sh_type != SHT_NOBITS
+	|| ((OLD_SECTION_H (old_plt_index).sh_addr
+	     + OLD_SECTION_H (old_plt_index).sh_size
+	     != OLD_SECTION_H (old_bss_index).sh_addr)
+	    && (old_sbss_index == -1
+		|| (OLD_SECTION_H (old_plt_index).sh_addr
+		    + OLD_SECTION_H (old_plt_index).sh_size
+		    != OLD_SECTION_H (old_sbss_index).sh_addr))))
       old_plt_index = -1;
 
   if (old_sbss_index == -1 && old_plt_index == -1)
This bug report was last modified 9 years and 171 days ago.

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