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[deliverable/binutils-gdb.git] / bfd / compress.c

diff --git a/bfd/compress.c b/bfd/compress.c
index 20eef9528265e905e9b7220e38520625cfb15dea..0087a665d87b3357e0ba190acdc347892bd944ca 100644 (file)
--- a/bfd/compress.c
+++ b/bfd/compress.c
@@ -1,5 +1,5 @@
 /* Compressed section support (intended for debug sections).
-   Copyright (C) 2008-2014 Free Software Foundation, Inc.
+   Copyright (C) 2008-2015 Free Software Foundation, Inc.
 
    This file is part of BFD, the Binary File Descriptor library.
 
@@ -152,7 +152,8 @@ DESCRIPTION
        return @var{*ptr} with memory malloc'd by this function.
 
        Return @code{TRUE} if the full section contents is retrieved
-       successfully.
+       successfully.  If the section has no contents then this function
+       returns @code{TRUE} but @var{*ptr} is set to NULL.
 */
 
 bfd_boolean
@@ -172,7 +173,10 @@ bfd_get_full_section_contents (bfd *abfd, sec_ptr sec, bfd_byte **ptr)
   else
     sz = sec->size;
   if (sz == 0)
-    return TRUE;
+    {
+      *ptr = NULL;
+      return TRUE;
+    }
 
   switch (sec->compress_status)
     {
@@ -183,6 +187,7 @@ bfd_get_full_section_contents (bfd *abfd, sec_ptr sec, bfd_byte **ptr)
          if (p == NULL)
            return FALSE;
        }
+
       if (!bfd_get_section_contents (abfd, sec, p, 0, sz))
        {
          if (*ptr != p)
@@ -239,6 +244,8 @@ bfd_get_full_section_contents (bfd *abfd, sec_ptr sec, bfd_byte **ptr)
 #endif
 
     case COMPRESS_SECTION_DONE:
+      if (sec->contents == NULL)
+       return FALSE;
       if (p == NULL)
        {
          p = (bfd_byte *) bfd_malloc (sz);
@@ -246,7 +253,9 @@ bfd_get_full_section_contents (bfd *abfd, sec_ptr sec, bfd_byte **ptr)
            return FALSE;
          *ptr = p;
        }
-      memcpy (p, sec->contents, sz);
+      /* PR 17512; file: 5bc29788.  */
+      if (p != sec->contents)
+       memcpy (p, sec->contents, sz);
       return TRUE;
 
     default: