X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=bfd%2Fmerge.c;h=632c852390355829f95e149b7d72f0982a1a0b2b;hb=60391a255b720e37ab1efbb7e83bf7dfa270a0fe;hp=2d9182e2b126d0118d944e0c8fa1f2df2b452920;hpb=07d6d2b8345ef3dc82eab49635acac9ee67dbb18;p=external%2Fbinutils.git

diff --git a/bfd/merge.c b/bfd/merge.c
index 2d9182e..632c852 100644
--- a/bfd/merge.c
+++ b/bfd/merge.c
@@ -1,5 +1,5 @@
 /* SEC_MERGE support.
-   Copyright (C) 2001-2017 Free Software Foundation, Inc.
+   Copyright (C) 2001-2019 Free Software Foundation, Inc.
    Written by Jakub Jelinek <jakub@redhat.com>.
 
    This file is part of BFD, the Binary File Descriptor library.
@@ -24,6 +24,7 @@
    as used in ELF SHF_MERGE.  */
 
 #include "sysdep.h"
+#include <limits.h>
 #include "bfd.h"
 #include "elf-bfd.h"
 #include "libbfd.h"
@@ -376,18 +377,27 @@ _bfd_add_merge_section (bfd *abfd, void **psinfo, asection *sec,
       || sec->entsize == 0)
     return TRUE;
 
+  if (sec->size % sec->entsize != 0)
+    return TRUE;
+
   if ((sec->flags & SEC_RELOC) != 0)
     {
       /* We aren't prepared to handle relocations in merged sections.  */
       return TRUE;
     }
 
-  align = sec->alignment_power;
-  if ((sec->entsize < (unsigned) 1 << align
+#ifndef CHAR_BIT
+#define CHAR_BIT 8
+#endif
+  if (sec->alignment_power >= sizeof (align) * CHAR_BIT)
+    return TRUE;
+
+  align = 1u << sec->alignment_power;
+  if ((sec->entsize < align
        && ((sec->entsize & (sec->entsize - 1))
 	   || !(sec->flags & SEC_STRINGS)))
-      || (sec->entsize > (unsigned) 1 << align
-	  && (sec->entsize & (((unsigned) 1 << align) - 1))))
+      || (sec->entsize > align
+	  && (sec->entsize & (align - 1))))
     {
       /* Sanity check.  If string character size is smaller than
 	 alignment, then we require character size to be a power
@@ -611,7 +621,7 @@ is_suffix (const struct sec_merge_hash_entry *A,
 
 /* This is a helper function for _bfd_merge_sections.  It attempts to
    merge strings matching suffixes of longer strings.  */
-static bfd_boolean
+static struct sec_merge_sec_info *
 merge_strings (struct sec_merge_info *sinfo)
 {
   struct sec_merge_hash_entry **array, **a, *e;
@@ -623,7 +633,7 @@ merge_strings (struct sec_merge_info *sinfo)
   amt = sinfo->htab->size * sizeof (struct sec_merge_hash_entry *);
   array = (struct sec_merge_hash_entry **) bfd_malloc (amt);
   if (array == NULL)
-    return FALSE;
+    return NULL;
 
   for (e = sinfo->htab->first, a = array; e; e = e->next)
     if (e->alignment)
@@ -693,11 +703,6 @@ merge_strings (struct sec_merge_info *sinfo)
 	}
     }
   secinfo->sec->size = size;
-  if (secinfo->sec->alignment_power != 0)
-    {
-      bfd_size_type align = (bfd_size_type) 1 << secinfo->sec->alignment_power;
-      secinfo->sec->size = (secinfo->sec->size + align - 1) & -align;
-    }
 
   /* And now adjust the rest, removing them from the chain (but not hashtable)
      at the same time.  */
@@ -714,7 +719,7 @@ merge_strings (struct sec_merge_info *sinfo)
 	    e->u.index = e->u.suffix->u.index + (e->u.suffix->len - e->len);
 	  }
       }
-  return TRUE;
+  return secinfo;
 }
 
 /* This function is called once after all SEC_MERGE sections are registered
@@ -730,7 +735,8 @@ _bfd_merge_sections (bfd *abfd,
 
   for (sinfo = (struct sec_merge_info *) xsinfo; sinfo; sinfo = sinfo->next)
     {
-      struct sec_merge_sec_info * secinfo;
+      struct sec_merge_sec_info *secinfo;
+      bfd_size_type align;
 
       if (! sinfo->chain)
 	continue;
@@ -741,6 +747,7 @@ _bfd_merge_sections (bfd *abfd,
       secinfo->next = NULL;
 
       /* Record the sections into the hash table.  */
+      align = 1;
       for (secinfo = sinfo->chain; secinfo; secinfo = secinfo->next)
 	if (secinfo->sec->flags & SEC_EXCLUDE)
 	  {
@@ -748,18 +755,25 @@ _bfd_merge_sections (bfd *abfd,
 	    if (remove_hook)
 	      (*remove_hook) (abfd, secinfo->sec);
 	  }
-	else if (! record_section (sinfo, secinfo))
-	  return FALSE;
-
-      if (secinfo)
-	continue;
+	else
+	  {
+	    if (!record_section (sinfo, secinfo))
+	      return FALSE;
+	    if (align)
+	      {
+		align = (bfd_size_type) 1 << secinfo->sec->alignment_power;
+		if ((secinfo->sec->size & (align - 1)) != 0)
+		  align = 0;
+	      }
+	  }
 
       if (sinfo->htab->first == NULL)
 	continue;
 
       if (sinfo->htab->strings)
 	{
-	  if (!merge_strings (sinfo))
+	  secinfo = merge_strings (sinfo);
+	  if (!secinfo)
 	    return FALSE;
 	}
       else
@@ -779,8 +793,7 @@ _bfd_merge_sections (bfd *abfd,
 		  e->secinfo->first_str = e;
 		  size = 0;
 		}
-	      size = (size + e->alignment - 1)
-		     & ~((bfd_vma) e->alignment - 1);
+	      size = (size + e->alignment - 1) & ~((bfd_vma) e->alignment - 1);
 	      e->u.index = size;
 	      size += e->len;
 	      secinfo = e->secinfo;
@@ -788,11 +801,16 @@ _bfd_merge_sections (bfd *abfd,
 	  secinfo->sec->size = size;
 	}
 
-	/* Finally remove all input sections which have not made it into
-	   the hash table at all.  */
-	for (secinfo = sinfo->chain; secinfo; secinfo = secinfo->next)
-	  if (secinfo->first_str == NULL)
-	    secinfo->sec->flags |= SEC_EXCLUDE | SEC_KEEP;
+      /* If the input sections were padded according to their alignments,
+	 then pad the output too.  */
+      if (align)
+	secinfo->sec->size = (secinfo->sec->size + align - 1) & -align;
+
+      /* Finally remove all input sections which have not made it into
+	 the hash table at all.  */
+      for (secinfo = sinfo->chain; secinfo; secinfo = secinfo->next)
+	if (secinfo->first_str == NULL)
+	  secinfo->sec->flags |= SEC_EXCLUDE | SEC_KEEP;
     }
 
   return TRUE;
@@ -865,8 +883,8 @@ _bfd_merged_section_offset (bfd *output_bfd ATTRIBUTE_UNUSED, asection **psec,
       if (offset > sec->rawsize)
 	_bfd_error_handler
 	  /* xgettext:c-format */
-	  (_("%B: access beyond end of merged section (%Ld)"),
-	   sec->owner, offset);
+	  (_("%pB: access beyond end of merged section (%" PRId64 ")"),
+	   sec->owner, (int64_t) offset);
       return secinfo->first_str ? sec->size : 0;
     }