Subject: bug#20614: Segmentation fault when building on Power8 Little Endian

From: YAMAMOTO Mitsuharu <[email-masked]>
Date: Wed, 07 Oct 2015 19:56:00 +0900

What happens if you apply the following patch?

				     YAMAMOTO Mitsuharu
				[email-masked]

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)