bfd:

	* mach-o-i386.c (bfd_mach_o_section_type_valid_for_tgt): Define NULL.
	* mach-o-target.c (bfd_mach_o_backend_data): Initialize bfd_mach_o_section_type_valid_for_tgt
	* mach-o-x86-64.c (bfd_mach_o_section_type_valid_for_x86_64): New.
	(bfd_mach_o_section_type_valid_for_tgt): Set to bfd_mach_o_section_type_valid_for_x86_64.
	* mach-o.c (bfd_mach_o_section_type_name): Reorder and eliminate dup.
	(bfd_mach_o_section_attribute_name): Reorder.
	(bfd_mach_o_get_section_type_from_name): If the target has defined a validator for section
	types, then use it.
	* mach-o.h (bfd_mach_o_get_section_type_from_name): Alter declaration to include the bfd.

gas:

	* config/obj-macho.c (obj_mach_o_section): Account for target-dependent section
	types.  Improve error handling when wrong section types/attributes are specified.

gas/testsuite:

	* gas/mach-o/err-sections-1.s: New.
	* gas/mach-o/err-sections-2.s: New.
	* gas/mach-o/sections-3.d: New.
	* gas/mach-o/sections-3.s: New.

6 files changed, 52 insertions, 12 deletions

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index b651abe..a2d7499 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,18 @@
+2011-12-19  Iain Sandoe  <idsandoe@googlemail.com>
+
+	* mach-o-i386.c (bfd_mach_o_section_type_valid_for_tgt): Define NULL.
+	* mach-o-target.c (bfd_mach_o_backend_data): Initialize 
+	bfd_mach_o_section_type_valid_for_tgt
+	* mach-o-x86-64.c (bfd_mach_o_section_type_valid_for_x86_64): New.
+	(bfd_mach_o_section_type_valid_for_tgt): Set to 
+	bfd_mach_o_section_type_valid_for_x86_64.
+	* mach-o.c (bfd_mach_o_section_type_name): Reorder and eliminate dup.
+	(bfd_mach_o_section_attribute_name): Reorder.
+	(bfd_mach_o_get_section_type_from_name): If the target has defined a
+	validator for section types, then use it.
+	* mach-o.h (bfd_mach_o_get_section_type_from_name): Alter declaration
+	to include the bfd.
+
 2011-12-19  Chung-Lin Tang  <cltang@codesourcery.com>
 
 	* reloc.c (BFD_RELOC_MIPS16_TLS_GD,BFD_RELOC_MIPS16_TLS_LDM,
diff --git a/bfd/mach-o-i386.c b/bfd/mach-o-i386.c
index 3dadcb8..d106710 100644
--- a/bfd/mach-o-i386.c
+++ b/bfd/mach-o-i386.c
@@ -338,6 +338,7 @@ const mach_o_segment_name_xlat mach_o_i386_segsec_names_xlat[] =
 #define bfd_mach_o_print_thread bfd_mach_o_i386_print_thread
 
 #define bfd_mach_o_tgt_seg_table mach_o_i386_segsec_names_xlat
+#define bfd_mach_o_section_type_valid_for_tgt NULL
 
 #define bfd_mach_o_bfd_reloc_type_lookup bfd_mach_o_i386_bfd_reloc_type_lookup 
 #define bfd_mach_o_bfd_reloc_name_lookup bfd_mach_o_i386_bfd_reloc_name_lookup
diff --git a/bfd/mach-o-target.c b/bfd/mach-o-target.c
index 4aeb920..a2aa573 100644
--- a/bfd/mach-o-target.c
+++ b/bfd/mach-o-target.c
@@ -96,7 +96,8 @@ static const bfd_mach_o_backend_data TARGET_NAME_BACKEND =
   bfd_mach_o_swap_reloc_in,
   bfd_mach_o_swap_reloc_out,
   bfd_mach_o_print_thread,
-  bfd_mach_o_tgt_seg_table
+  bfd_mach_o_tgt_seg_table,
+  bfd_mach_o_section_type_valid_for_tgt
 };
 
 const bfd_target TARGET_NAME =
diff --git a/bfd/mach-o-x86-64.c b/bfd/mach-o-x86-64.c
index c86efb7..cc31a1c 100644
--- a/bfd/mach-o-x86-64.c
+++ b/bfd/mach-o-x86-64.c
@@ -281,6 +281,16 @@ bfd_mach_o_x86_64_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
   return NULL;
 }
 
+static bfd_boolean
+bfd_mach_o_section_type_valid_for_x86_64 (unsigned long val)
+{
+  if (val == BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS
+      || val == BFD_MACH_O_S_LAZY_SYMBOL_POINTERS
+      || val == BFD_MACH_O_S_SYMBOL_STUBS)
+    return FALSE;
+  return TRUE;
+}
+
 #define bfd_mach_o_swap_reloc_in bfd_mach_o_x86_64_swap_reloc_in
 #define bfd_mach_o_swap_reloc_out bfd_mach_o_x86_64_swap_reloc_out
 
@@ -288,6 +298,7 @@ bfd_mach_o_x86_64_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
 #define bfd_mach_o_bfd_reloc_name_lookup bfd_mach_o_x86_64_bfd_reloc_name_lookup
 #define bfd_mach_o_print_thread NULL
 #define bfd_mach_o_tgt_seg_table NULL
+#define bfd_mach_o_section_type_valid_for_tgt bfd_mach_o_section_type_valid_for_x86_64
 
 #define TARGET_NAME 		mach_o_x86_64_vec
 #define TARGET_STRING 		"mach-o-x86-64"
diff --git a/bfd/mach-o.c b/bfd/mach-o.c
index dca8601..cc68d89 100644
--- a/bfd/mach-o.c
+++ b/bfd/mach-o.c
@@ -3550,24 +3550,26 @@ bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type type)
     }
 }
 
+/* The following two tables should be kept, as far as possible, in order of
+   most frequently used entries to optimize their use from gas.  */
+
 const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[] =
 {
   { "regular", BFD_MACH_O_S_REGULAR},
+  { "coalesced", BFD_MACH_O_S_COALESCED},
   { "zerofill", BFD_MACH_O_S_ZEROFILL},
   { "cstring_literals", BFD_MACH_O_S_CSTRING_LITERALS},
   { "4byte_literals", BFD_MACH_O_S_4BYTE_LITERALS},
   { "8byte_literals", BFD_MACH_O_S_8BYTE_LITERALS},
+  { "16byte_literals", BFD_MACH_O_S_16BYTE_LITERALS},
   { "literal_pointers", BFD_MACH_O_S_LITERAL_POINTERS},
-  { "non_lazy_symbol_pointers", BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS},
-  { "lazy_symbol_pointers", BFD_MACH_O_S_LAZY_SYMBOL_POINTERS},
-  { "symbol_stubs", BFD_MACH_O_S_SYMBOL_STUBS},
   { "mod_init_func_pointers", BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS},
   { "mod_fini_func_pointers", BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS},
-  { "coalesced", BFD_MACH_O_S_COALESCED},
   { "gb_zerofill", BFD_MACH_O_S_GB_ZEROFILL},
   { "interposing", BFD_MACH_O_S_INTERPOSING},
-  { "16byte_literals", BFD_MACH_O_S_16BYTE_LITERALS},
   { "dtrace_dof", BFD_MACH_O_S_DTRACE_DOF},
+  { "non_lazy_symbol_pointers", BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS},
+  { "lazy_symbol_pointers", BFD_MACH_O_S_LAZY_SYMBOL_POINTERS},
   { "symbol_stubs", BFD_MACH_O_S_SYMBOL_STUBS},
   { "lazy_dylib_symbol_pointers", BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS},
   { NULL, 0}
@@ -3575,30 +3577,38 @@ const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[] =
 
 const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[] =
 {
+  { "pure_instructions", BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS },
+  { "some_instructions", BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS },
   { "loc_reloc", BFD_MACH_O_S_ATTR_LOC_RELOC },
   { "ext_reloc", BFD_MACH_O_S_ATTR_EXT_RELOC },
-  { "some_instructions", BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS },
   { "debug", BFD_MACH_O_S_ATTR_DEBUG },
-  { "modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
   { "live_support", BFD_MACH_O_S_ATTR_LIVE_SUPPORT },
   { "no_dead_strip", BFD_MACH_O_S_ATTR_NO_DEAD_STRIP },
   { "strip_static_syms", BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS },
   { "no_toc", BFD_MACH_O_S_ATTR_NO_TOC },
-  { "pure_instructions", BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS },
   { "self_modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
+  { "modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
   { NULL, 0}
 };
 
 /* Get the section type from NAME.  Return 256 if NAME is unknown.  */
 
 unsigned int
-bfd_mach_o_get_section_type_from_name (const char *name)
+bfd_mach_o_get_section_type_from_name (bfd *abfd, const char *name)
 {
   const bfd_mach_o_xlat_name *x;
+  bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
 
   for (x = bfd_mach_o_section_type_name; x->name; x++)
     if (strcmp (x->name, name) == 0)
-      return x->val;
+      {
+	/* We found it... does the target support it?  */
+	if (bed->bfd_mach_o_section_type_valid_for_target == NULL
+	    || bed->bfd_mach_o_section_type_valid_for_target (x->val))
+	  return x->val; /* OK.  */
+	else
+	  break; /* Not supported.  */
+      }
   /* Maximum section ID = 0xff.  */
   return 256;
 }
@@ -3785,6 +3795,7 @@ bfd_boolean bfd_mach_o_free_cached_info (bfd *abfd)
 #define bfd_mach_o_swap_reloc_out NULL
 #define bfd_mach_o_print_thread NULL
 #define bfd_mach_o_tgt_seg_table NULL
+#define bfd_mach_o_section_type_valid_for_tgt NULL
 
 #define TARGET_NAME 		mach_o_be_vec
 #define TARGET_STRING     	"mach-o-be"
diff --git a/bfd/mach-o.h b/bfd/mach-o.h
index 23c3e1c..89dce1a 100644
--- a/bfd/mach-o.h
+++ b/bfd/mach-o.h
@@ -584,7 +584,7 @@ bfd_boolean bfd_mach_o_set_section_contents (bfd *, asection *, const void *,
                                              file_ptr, bfd_size_type);
 unsigned int bfd_mach_o_version (bfd *);
 
-unsigned int bfd_mach_o_get_section_type_from_name (const char *);
+unsigned int bfd_mach_o_get_section_type_from_name (bfd *, const char *);
 unsigned int bfd_mach_o_get_section_attribute_from_name (const char *);
 
 void bfd_mach_o_convert_section_name_to_bfd (bfd *, const char *, const char *,
@@ -636,6 +636,7 @@ typedef struct bfd_mach_o_backend_data
   bfd_boolean (*_bfd_mach_o_print_thread)(bfd *, bfd_mach_o_thread_flavour *,
                                           void *, char *);
   const mach_o_segment_name_xlat *segsec_names_xlat;
+  bfd_boolean (*bfd_mach_o_section_type_valid_for_target) (unsigned long);
 }
 bfd_mach_o_backend_data;