[COMMITTED PATCH] fix nacl targets' special layout to refuse writable segments as eligible for file headers

Roland McGrath mcgrathr@google.com
Thu Nov 29 19:09:00 GMT 2012


Another fix for another corner case in my special layout logic for
*-*-nacl* targets.

Committed to trunk and 2.23 branch.


Thanks,
Roland


bfd/
	* elf-nacl.c (segment_eligible_for_headers): Disallow writable segments.

--- a/bfd/elf-nacl.c
+++ b/bfd/elf-nacl.c
@@ -43,9 +43,9 @@ segment_executable (struct elf_segment_map *seg)
 }

 /* Determine if this segment is eligible to receive the file and program
-   headers.  It must be non-executable and have contents.  Its first
-   section must start far enough past the page boundary to allow space
-   for the headers.  */
+   headers.  It must be read-only, non-executable, and have contents.
+   Its first section must start far enough past the page boundary to
+   allow space for the headers.  */
 static bfd_boolean
 segment_eligible_for_headers (struct elf_segment_map *seg,
                               bfd_vma maxpagesize, bfd_vma sizeof_headers)
@@ -56,7 +56,7 @@ segment_eligible_for_headers (struct elf_segment_map *seg,
     return FALSE;
   for (i = 0; i < seg->count; ++i)
     {
-      if (seg->sections[i]->flags & SEC_CODE)
+      if ((seg->sections[i]->flags & (SEC_CODE|SEC_READONLY)) != SEC_READONLY)
         return FALSE;
       if (seg->sections[i]->flags & SEC_HAS_CONTENTS)
         any_contents = TRUE;



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