Add pe/x86_64 bigobj file format.

bfd/
	* peicode.h (pe_ILF_object_p): Adjust, as the version number
	has been read.
	(pe_bfd_object_p): Also read version number to detect ILF.
	* pe-x86_64.c (COFF_WITH_PE_BIGOBJ): Define.
	(x86_64pe_bigobj_vec): Define
	* coffcode.h (bfd_coff_backend_data): Add _bfd_coff_max_nscns field.
	(bfd_coff_max_nscns): New macro.
	(coff_compute_section_file_positions): Use unsigned int for
	target_index.  Compare with bfd_coff_max_nscns.
	(bfd_coff_std_swap_table, ticoff0_swap_table, ticoff1_swap_table):
	Set a value for _bfd_coff_max_nscns.
	(header_bigobj_classid): New constant.
	(coff_bigobj_swap_filehdr_in, coff_bigobj_swap_filehdr_out)
	(coff_bigobj_swap_sym_in, coff_bigobj_swap_sym_out)
	(coff_bigobj_swap_aux_in, coff_bigobj_swap_aux_out): New
	functions.
	(bigobj_swap_table): New table.
	* libcoff.h: Regenerate.
	* coff-sh.c (bfd_coff_small_swap_table): Likewise.
	* coff-alpha.c (alpha_ecoff_backend_data): Add value for
	_bfd_coff_max_nscns.
	* coff-mips.c (mips_ecoff_backend_data): Likewise.
	* coff-rs6000.c (bfd_xcoff_backend_data)
	(bfd_pmac_xcoff_backend_data): Likewise.
	* coff64-rs6000.c (bfd_xcoff_backend_data)
	(bfd_xcoff_aix5_backend_data): Likewise.
	* targets.c (x86_64pe_bigobj_vec): Declare.
	* configure.in (x86_64pe_bigobj_vec): New vector.
	* configure: Regenerate.
	* config.bfd: Add bigobj object format for Windows targets.

gas/
	* config/tc-i386.c (use_big_obj): Declare.
	(OPTION_MBIG_OBJ): Define.
	(md_longopts): Add -mbig-obj option.
	(md_parse_option): Handle it.
	(md_show_usage): Display help for this option.
	(i386_target_format): Use bigobj for x86-64 if -mbig-obj.
	* doc/c-i386.texi: Document the option.

gas/testsuite/
	* gas/pe/big-obj.d, gas/pe/big-obj.s: Add test.
	* gas/pe/pe.exp: Add test.

include/coff/
	* pe.h (struct external_ANON_OBJECT_HEADER_BIGOBJ): Declare.
	(FILHSZ_BIGOBJ): Define.
	(struct external_SYMBOL_EX): Declare.
	(SYMENT_BIGOBJ, SYMESZ_BIGOBJ): Define.
	(union external_AUX_SYMBOL_EX): Declare.
	(AUXENT_BIGOBJ, AUXESZ_BIGOBJ): Define.
	* internal.h (struct internal_filehdr): Change type
	of f_nscns.

1 files changed, 23 insertions, 1 deletions

diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c
index f6283a6..734935a 100644
--- a/gas/config/tc-i386.c
+++ b/gas/config/tc-i386.c
@@ -513,6 +513,11 @@ enum x86_elf_abi
 static enum x86_elf_abi x86_elf_abi = I386_ABI;
 #endif
 
+#if defined (TE_PE) || defined (TE_PEP)
+/* Use big object file format.  */
+static int use_big_obj = 0;
+#endif
+
 /* 1 for intel syntax,
    0 if att syntax.  */
 static int intel_syntax = 0;
@@ -9497,6 +9502,7 @@ const char *md_shortopts = "qn";
 #define OPTION_MADD_BND_PREFIX (OPTION_MD_BASE + 15)
 #define OPTION_MEVEXLIG (OPTION_MD_BASE + 16)
 #define OPTION_MEVEXWIG (OPTION_MD_BASE + 17)
+#define OPTION_MBIG_OBJ (OPTION_MD_BASE + 18)
 
 struct option md_longopts[] =
 {
@@ -9523,6 +9529,9 @@ struct option md_longopts[] =
   {"madd-bnd-prefix", no_argument, NULL, OPTION_MADD_BND_PREFIX},
   {"mevexlig", required_argument, NULL, OPTION_MEVEXLIG},
   {"mevexwig", required_argument, NULL, OPTION_MEVEXWIG},
+# if defined (TE_PE) || defined (TE_PEP)
+  {"mbig-obj", no_argument, NULL, OPTION_MBIG_OBJ},
+#endif
   {NULL, no_argument, NULL, 0}
 };
 size_t md_longopts_size = sizeof (md_longopts);
@@ -9804,6 +9813,12 @@ md_parse_option (int c, char *arg)
 	as_fatal (_("invalid -mevexwig= option: `%s'"), arg);
       break;
 
+# if defined (TE_PE) || defined (TE_PEP)
+    case OPTION_MBIG_OBJ:
+      use_big_obj = 1;
+      break;
+#endif
+
     default:
       return 0;
     }
@@ -9956,6 +9971,10 @@ md_show_usage (FILE *stream)
   -mold-gcc               support old (<= 2.8.1) versions of gcc\n"));
   fprintf (stream, _("\
   -madd-bnd-prefix        add BND prefix for all valid branches\n"));
+# if defined (TE_PE) || defined (TE_PEP)
+  fprintf (stream, _("\
+  -mbig-obj               generate big object files\n"));
+#endif
 }
 
 #if ((defined (OBJ_MAYBE_COFF) && defined (OBJ_MAYBE_AOUT)) \
@@ -9994,7 +10013,10 @@ i386_target_format (void)
 #if defined (OBJ_MAYBE_COFF) || defined (OBJ_COFF)
 # if defined (TE_PE) || defined (TE_PEP)
     case bfd_target_coff_flavour:
-      return flag_code == CODE_64BIT ? "pe-x86-64" : "pe-i386";
+      if (flag_code == CODE_64BIT)
+	return use_big_obj ? "pe-bigobj-x86-64" : "pe-x86-64";
+      else
+	return "pe-i386";
 # elif defined (TE_GO32)
     case bfd_target_coff_flavour:
       return "coff-go32";