1999-09-06 Donn Terry <donn@interix.com>

	* coffcode.h (sort_by_secaddr): New static function if
	COFF_IMAGE_WITH_PE.
	(coff_compute_section_file_positions): If COFF_IMAGE_WITH_PE, sort
	sections by VMA when assigning target_index values.  Always set
	virt_size.

1 files changed, 122 insertions, 34 deletions

diff --git a/bfd/coffcode.h b/bfd/coffcode.h
index 408ee96..2b85b23 100644
--- a/bfd/coffcode.h
+++ b/bfd/coffcode.h
@@ -2511,6 +2511,30 @@ coff_set_arch_mach (abfd, arch, machine)
   return true;			/* We're easy ... */
 }
 
+#ifdef COFF_IMAGE_WITH_PE
+
+/* This is used to sort sections by VMA, as required by PE image
+   files.  */
+
+static int sort_by_secaddr PARAMS ((const PTR, const PTR));
+
+static int
+sort_by_secaddr (arg1, arg2)
+     const PTR arg1;
+     const PTR arg2;
+{
+  const asection *a = *(const asection **) arg1;
+  const asection *b = *(const asection **) arg2;
+
+  if (a->vma < b->vma)
+    return -1;
+  else if (a->vma > b->vma)
+    return 1;
+  else
+    return 0;
+}
+
+#endif /* COFF_IMAGE_WITH_PE */
 
 /* Calculate the file position for each section. */
 
@@ -2529,7 +2553,6 @@ coff_compute_section_file_positions (abfd)
   asection *previous = (asection *) NULL;
   file_ptr sofar = FILHSZ;
   boolean align_adjust;
-  unsigned int count;
 #ifdef ALIGN_SECTIONS_IN_FILE
   file_ptr old_sofar;
 #endif
@@ -2613,30 +2636,114 @@ coff_compute_section_file_positions (abfd)
       sofar += SCNHSZ;
 #endif
 
+#ifdef COFF_IMAGE_WITH_PE
+  {
+    /* PE requires the sections to be in memory order when listed in
+       the section headers.  It also does not like empty loadable
+       sections.  The sections apparently do not have to be in the
+       right order in the image file itself, but we do need to get the
+       target_index values right.  */
+
+    int count;
+    asection **section_list;
+    int i;
+    int target_index;
+
+    count = 0;
+    for (current = abfd->sections; current != NULL; current = current->next)
+      ++count;
+
+    /* We allocate an extra cell to simplify the final loop.  */
+    section_list = bfd_malloc (sizeof (struct asection *) * (count + 1));
+    if (section_list == NULL)
+      return false;
+
+    i = 0;
+    for (current = abfd->sections; current != NULL; current = current->next)
+      {
+	section_list[i] = current;
+	++i;
+      }
+    section_list[i] = NULL;
+
+    qsort (section_list, count, sizeof (asection *), sort_by_secaddr);
+
+    /* Rethread the linked list into sorted order; at the same time,
+       assign target_index values.  */
+    target_index = 1;
+    abfd->sections = section_list[0];
+    for (i = 0; i < count; i++)
+      {
+	current = section_list[i];
+	current->next = section_list[i + 1];
+
+	/* Later, if the section has zero size, we'll be throwing it
+	   away, so we don't want to number it now.  Note that having
+	   a zero size and having real contents are different
+	   concepts: .bss has no contents, but (usually) non-zero
+	   size.  */
+	if (current->_raw_size == 0)
+	  {
+	    /* Discard.  However, it still might have (valid) symbols
+	       in it, so arbitrarily set it to section 1 (indexing is
+	       1-based here; usually .text).  __end__ and other
+	       contents of .endsection really have this happen.
+	       FIXME: This seems somewhat dubious.  */
+	    current->target_index = 1;
+	  }
+	else
+	  current->target_index = target_index++;
+      }
+
+    free (section_list);
+  }
+#else /* ! COFF_IMAGE_WITH_PE */
+  {
+    /* Set the target_index field.  */
+    int target_index;
+
+    target_index = 1;
+    for (current = abfd->sections; current != NULL; current = current->next)
+      current->target_index = target_index++;
+  }
+#endif /* ! COFF_IMAGE_WITH_PE */
+
   align_adjust = false;
-  for (current = abfd->sections, count = 1;
+  for (current = abfd->sections;
        current != (asection *) NULL;
-       current = current->next, ++count)
+       current = current->next)
     {
 #ifdef COFF_IMAGE_WITH_PE
-      /* The NT loader does not want empty section headers, so we omit
-         them.  We don't actually remove the section from the BFD,
-         although we probably should.  This matches code in
-         coff_write_object_contents.  */
-      if (current->_raw_size == 0)
+      /* With PE we have to pad each section to be a multiple of its
+	 page size too, and remember both sizes.  */
+      if (coff_section_data (abfd, current) == NULL)
+	{
+	  current->used_by_bfd =
+	    (PTR) bfd_zalloc (abfd, sizeof (struct coff_section_tdata));
+	  if (current->used_by_bfd == NULL)
+	    return false;
+	}
+      if (pei_section_data (abfd, current) == NULL)
 	{
-	  current->target_index = -1;
-	  --count;
-	  continue;
+	  coff_section_data (abfd, current)->tdata =
+	    (PTR) bfd_zalloc (abfd, sizeof (struct pei_section_tdata));
+	  if (coff_section_data (abfd, current)->tdata == NULL)
+	    return false;
 	}
+      if (pei_section_data (abfd, current)->virt_size == 0)
+	pei_section_data (abfd, current)->virt_size = current->_raw_size;
 #endif
 
-      current->target_index = count;
-
-      /* Only deal with sections which have contents */
+      /* Only deal with sections which have contents.  */
       if (!(current->flags & SEC_HAS_CONTENTS))
 	continue;
 
+#ifdef COFF_IMAGE_WITH_PE
+      /* Make sure we skip empty sections in a PE image.  */
+      if (current->_raw_size == 0)
+	continue;
+#endif
+
       /* Align the sections in the file to the same boundary on
 	 which they are aligned in virtual memory.  I960 doesn't
 	 do this (FIXME) so we can stay in sync with Intel.  960
@@ -2667,26 +2774,7 @@ coff_compute_section_file_positions (abfd)
       current->filepos = sofar;
 
 #ifdef COFF_IMAGE_WITH_PE
-      /* With PE we have to pad each section to be a multiple of its
-	 page size too, and remember both sizes.  */
-
-      if (coff_section_data (abfd, current) == NULL)
-	{
-	  current->used_by_bfd =
-	    (PTR) bfd_zalloc (abfd, sizeof (struct coff_section_tdata));
-	  if (current->used_by_bfd == NULL)
-	    return false;
-	}
-      if (pei_section_data (abfd, current) == NULL)
-	{
-	  coff_section_data (abfd, current)->tdata =
-	    (PTR) bfd_zalloc (abfd, sizeof (struct pei_section_tdata));
-	  if (coff_section_data (abfd, current)->tdata == NULL)
-	    return false;
-	}
-      if (pei_section_data (abfd, current)->virt_size == 0)
-	pei_section_data (abfd, current)->virt_size = current->_raw_size;
-
+      /* Set the padded size.  */
       current->_raw_size = (current->_raw_size + page_size -1) & -page_size;
 #endif