AArch64: Add support for AArch64 EFI (efi-*-aarch64).users/ARM/efi-aarch64-support-binutils

This adds support for efi-*-aarch64 by virtue of adding a new PEI target
pei-aarch64-little.  This is not a full tagret and only exists to support EFI
at this time.

This means that this target does not support relocation processing and is mostly
a container format.

As such it's not valid for use with gas but only with objcopy.

Any magic number is based on the Microsoft PE specification [1].

[1] https://docs.microsoft.com/en-us/windows/win32/debug/pe-format

bfd/ChangeLog:

2021-10-21  Tamar Christina  <tamar.christina@arm.com>

	PR binutils/26218
	* .gitignore (pe-aarch64igen.c): New.
	* Makefile.am (pei-aarch64.lo, pe-aarch64igen.lo, pei-aarch64.c,
	pe-aarch64igen.c): Add support.
	* Makefile.in: Likewise.
	* bfd.c (bfd_get_sign_extend_vma): Add pei-aarch64-little.
	* coff-aarch64.c: New file.
	* coffcode.h (coff_set_arch_mach_hook, coff_set_flags,
	coff_write_object_contents) Add aarch64 (aarch64_pei_vec) support.
	* config.bfd: Likewise.
	* configure: Likewise.
	* configure.ac: Likewise.
	* libpei.h (GET_OPTHDR_IMAGE_BASE, PUT_OPTHDR_IMAGE_BASE,
	GET_OPTHDR_SIZE_OF_STACK_RESERVE, PUT_OPTHDR_SIZE_OF_STACK_RESERVE,
	GET_OPTHDR_SIZE_OF_STACK_COMMIT, PUT_OPTHDR_SIZE_OF_STACK_COMMIT,
	GET_OPTHDR_SIZE_OF_HEAP_RESERVE, PUT_OPTHDR_SIZE_OF_HEAP_RESERVE,
	GET_OPTHDR_SIZE_OF_HEAP_COMMIT, PUT_OPTHDR_SIZE_OF_HEAP_COMMIT,
	GET_PDATA_ENTRY, _bfd_peAArch64_bfd_copy_private_bfd_data_common,
	_bfd_peAArch64_bfd_copy_private_section_data,
	_bfd_peAArch64_get_symbol_info, _bfd_peAArch64_only_swap_filehdr_out,
	_bfd_peAArch64_print_private_bfd_data_common,
	_bfd_peAArch64i_final_link_postscript,
	_bfd_peAArch64i_only_swap_filehdr_out, _bfd_peAArch64i_swap_aouthdr_in,
	_bfd_peAArch64i_swap_aouthdr_out, _bfd_peAArch64i_swap_aux_in,
	_bfd_peAArch64i_swap_aux_out, _bfd_peAArch64i_swap_lineno_in,
	_bfd_peAArch64i_swap_lineno_out, _bfd_peAArch64i_swap_scnhdr_out,
	_bfd_peAArch64i_swap_sym_in, _bfd_peAArch64i_swap_sym_out,
	_bfd_peAArch64i_swap_debugdir_in, _bfd_peAArch64i_swap_debugdir_out,
	_bfd_peAArch64i_write_codeview_record,
	_bfd_peAArch64i_slurp_codeview_record,
	_bfd_peAArch64_print_ce_compressed_pdata): New.
	* peXXigen.c (_bfd_XXi_swap_aouthdr_in, _bfd_XXi_swap_aouthdr_out,
	pe_print_pdata, _bfd_XX_print_private_bfd_data_common,
	_bfd_XX_bfd_copy_private_section_data, _bfd_XXi_final_link_postscript):
	Support COFF_WITH_peAArch64,
	* pei-aarch64.c: New file.
	* peicode.h (coff_swap_scnhdr_in, pe_ILF_build_a_bfd, pe_ILF_object_p):
	Support COFF_WITH_peAArch64.
	(jtab): Add dummy entry that traps.
	* targets.c (aarch64_pei_vec): New.

binutils/ChangeLog:

2021-10-21  Tamar Christina  <tamar.christina@arm.com>

	PR binutils/26218
	* objcopy.c (convert_efi_target): Add efi-*-aarch64 support.
	* testsuite/binutils-all/aarch64/pei-aarch64-little.d: New test.
	* testsuite/binutils-all/aarch64/pei-aarch64-little.s: New test.

include/ChangeLog:

2021-10-21  Tamar Christina  <tamar.christina@arm.com>

	PR binutils/26218
	* coff/aarch64.h: New file.
	* coff/pe.h (IMAGE_FILE_MACHINE_ARM64): New.

19 files changed, 494 insertions, 26 deletions

diff --git a/bfd/.gitignore b/bfd/.gitignore
index 0a5530d..d4f7423 100644
--- a/bfd/.gitignore
+++ b/bfd/.gitignore
@@ -10,6 +10,7 @@
 /peigen.c
 /pepigen.c
 /pex64igen.c
+/pe-aarch64igen.c
 /stmp-bfd-h
 /targmatch.h
 
diff --git a/bfd/Makefile.am b/bfd/Makefile.am
index ed2f701..a4c13c1 100644
--- a/bfd/Makefile.am
+++ b/bfd/Makefile.am
@@ -570,8 +570,10 @@ BFD64_BACKENDS = \
 	pe-x86_64.lo \
 	pei-ia64.lo \
 	pei-x86_64.lo \
+	pei-aarch64lo \
 	pepigen.lo \
 	pex64igen.lo \
+	pe-aarch64igen.lo \
 	vms-alpha.lo
 
 BFD64_BACKENDS_CFILES = \
@@ -609,6 +611,7 @@ BFD64_BACKENDS_CFILES = \
 	pe-x86_64.c \
 	pei-ia64.c \
 	pei-x86_64.c \
+	pei-aarch64.c \
 	vms-alpha.c
 
 OPTIONAL_BACKENDS = \
@@ -666,7 +669,7 @@ BUILD_CFILES = \
 	elf32-aarch64.c elf64-aarch64.c \
 	elf32-ia64.c elf64-ia64.c \
 	elf32-riscv.c elf64-riscv.c \
-	peigen.c pepigen.c pex64igen.c
+	peigen.c pepigen.c pex64igen.c pe-aarch64igen.c
 
 CFILES = $(SOURCE_CFILES) $(BUILD_CFILES)
 
@@ -862,6 +865,10 @@ pex64igen.c: peXXigen.c
 	echo "#line 1 \"peXXigen.c\"" > $@
 	$(SED) -e s/XX/pex64/g < $< >> $@
 
+pe-aarch64igen.c: peXXigen.c
+	echo "#line 1 \"peXXigen.c\"" > $@
+	$(SED) -e s/XX/peAArch64/g < $< >> $@
+
 BFD_H_DEPS= $(INCDIR)/ansidecl.h $(INCDIR)/symcat.h $(INCDIR)/diagnostics.h
 LOCAL_H_DEPS= libbfd.h sysdep.h config.h
 $(BFD32_LIBS) \
diff --git a/bfd/Makefile.in b/bfd/Makefile.in
index 12807d9..e78091f 100644
--- a/bfd/Makefile.in
+++ b/bfd/Makefile.in
@@ -997,8 +997,10 @@ BFD64_BACKENDS = \
 	pe-x86_64.lo \
 	pei-ia64.lo \
 	pei-x86_64.lo \
+	pei-aarch64.lo \
 	pepigen.lo \
 	pex64igen.lo \
+	pe-aarch64igen.lo \
 	vms-alpha.lo
 
 BFD64_BACKENDS_CFILES = \
@@ -1036,6 +1038,7 @@ BFD64_BACKENDS_CFILES = \
 	pe-x86_64.c \
 	pei-ia64.c \
 	pei-x86_64.c \
+	pei-aarch64.c \
 	vms-alpha.c
 
 OPTIONAL_BACKENDS = \
@@ -1092,7 +1095,7 @@ BUILD_CFILES = \
 	elf32-aarch64.c elf64-aarch64.c \
 	elf32-ia64.c elf64-ia64.c \
 	elf32-riscv.c elf64-riscv.c \
-	peigen.c pepigen.c pex64igen.c
+	peigen.c pepigen.c pex64igen.c pe-aarch64igen.c
 
 CFILES = $(SOURCE_CFILES) $(BUILD_CFILES)
 SOURCE_HFILES = \
@@ -1551,9 +1554,11 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/pei-mcore.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/pei-sh.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/pei-x86_64.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/pei-aarch64.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/peigen.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/pepigen.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/pex64igen.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/pe-aarch64igen.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/plugin.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ppcboot.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/reloc.Plo@am__quote@
@@ -1991,6 +1996,11 @@ pepigen.c : peXXigen.c
 pex64igen.c: peXXigen.c
 	echo "#line 1 \"peXXigen.c\"" > $@
 	$(SED) -e s/XX/pex64/g < $< >> $@
+
+pe-aarch64igen.c: peXXigen.c
+	echo "#line 1 \"peXXigen.c\"" > $@
+	$(SED) -e s/XX/peAArch64/g < $< >> $@
+
 $(BFD32_LIBS) \
  $(BFD64_LIBS) \
  $(ALL_MACHINES) \
diff --git a/bfd/bfd.c b/bfd/bfd.c
index 421f4f1..5c3797d 100644
--- a/bfd/bfd.c
+++ b/bfd/bfd.c
@@ -1738,6 +1738,7 @@ bfd_get_sign_extend_vma (bfd *abfd)
       || strcmp (name, "pei-i386") == 0
       || strcmp (name, "pe-x86-64") == 0
       || strcmp (name, "pei-x86-64") == 0
+      || strcmp (name, "pei-aarch64-little") == 0
       || strcmp (name, "pe-arm-wince-little") == 0
       || strcmp (name, "pei-arm-wince-little") == 0
       || strcmp (name, "aixcoff-rs6000") == 0
diff --git a/bfd/coff-aarch64.c b/bfd/coff-aarch64.c
new file mode 100644
index 0000000..b4dcc81
--- /dev/null
+++ b/bfd/coff-aarch64.c
@@ -0,0 +1,169 @@
+/* BFD back-end for AArch64 COFF files.
+   Copyright (C) 2021 Free Software Foundation, Inc.
+
+   This file is part of BFD, the Binary File Descriptor library.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+   MA 02110-1301, USA.  */
+
+
+#ifndef COFF_WITH_peAArch64
+#define COFF_WITH_peAArch64
+#endif
+
+/* Note we have to make sure not to include headers twice.
+   Not all headers are wrapped in #ifdef guards, so we define
+   PEI_HEADERS to prevent double including here.  */
+#ifndef PEI_HEADERS
+#include "sysdep.h"
+#include "bfd.h"
+#include "libbfd.h"
+#include "coff/aarch64.h"
+#include "coff/internal.h"
+#include "coff/pe.h"
+#include "libcoff.h"
+#include "libiberty.h"
+#endif
+
+#include "libcoff.h"
+
+/* The page size is a guess based on ELF.  */
+
+#define COFF_PAGE_SIZE 0x1000
+
+/* All users of this file have bfd_octets_per_byte (abfd, sec) == 1.  */
+#define OCTETS_PER_BYTE(ABFD, SEC) 1
+
+#ifndef PCRELOFFSET
+#define PCRELOFFSET true
+#endif
+
+/* Currently we don't handle any relocations.  */
+static reloc_howto_type pe_aarch64_std_reloc_howto[] =
+  {
+
+  };
+
+#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER  2
+#define COFF_PAGE_SIZE			      0x1000
+
+#ifndef NUM_ELEM
+#define NUM_ELEM(a) ((sizeof (a)) / sizeof ((a)[0]))
+#endif
+
+#define NUM_RELOCS NUM_ELEM (pe_aarch64_std_reloc_howto)
+
+#define RTYPE2HOWTO(cache_ptr, dst)             \
+  (cache_ptr)->howto =                          \
+    (dst)->r_type < NUM_RELOCS                  \
+    ? pe_aarch64_std_reloc_howto + (dst)->r_type   \
+    : NULL
+
+#ifndef bfd_pe_print_pdata
+#define bfd_pe_print_pdata      NULL
+#endif
+
+/* Return TRUE if this relocation should
+   appear in the output .reloc section.  */
+
+static bool
+in_reloc_p (bfd * abfd ATTRIBUTE_UNUSED,
+            reloc_howto_type * howto)
+{
+  return !howto->pc_relative;
+}
+
+#include "coffcode.h"
+
+/* Target vectors.  */
+const bfd_target
+#ifdef TARGET_SYM
+  TARGET_SYM =
+#else
+  aarch64_pei_vec =
+#endif
+{
+#ifdef TARGET_NAME
+  TARGET_NAME,
+#else
+ "pei-aarch64-little",			/* Name.  */
+#endif
+  bfd_target_coff_flavour,
+  BFD_ENDIAN_LITTLE,		/* Data byte order is little.  */
+  BFD_ENDIAN_LITTLE,		/* Header byte order is little.  */
+
+  (HAS_RELOC | EXEC_P		/* Object flags.  */
+   | HAS_LINENO | HAS_DEBUG
+   | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED | BFD_COMPRESS | BFD_DECOMPRESS),
+
+  (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* Section flags.  */
+#if defined(COFF_WITH_PE)
+   | SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_READONLY | SEC_DEBUGGING
+#endif
+   | SEC_CODE | SEC_DATA | SEC_EXCLUDE ),
+
+#ifdef TARGET_UNDERSCORE
+  TARGET_UNDERSCORE,		/* Leading underscore.  */
+#else
+  0,				/* Leading underscore.  */
+#endif
+  '/',				/* Ar_pad_char.  */
+  15,				/* Ar_max_namelen.  */
+  0,				/* match priority.  */
+  TARGET_KEEP_UNUSED_SECTION_SYMBOLS, /* keep unused section symbols.  */
+
+     /* Data conversion functions.  */
+     bfd_getl64, bfd_getl_signed_64, bfd_putl64,
+     bfd_getl32, bfd_getl_signed_32, bfd_putl32,
+     bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Data.  */
+     /* Header conversion functions.  */
+     bfd_getl64, bfd_getl_signed_64, bfd_putl64,
+     bfd_getl32, bfd_getl_signed_32, bfd_putl32,
+     bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Hdrs.  */
+
+  /* Note that we allow an object file to be treated as a core file as well.  */
+  {				/* bfd_check_format.  */
+    _bfd_dummy_target,
+    coff_object_p,
+    bfd_generic_archive_p,
+    coff_object_p
+  },
+  {				/* bfd_set_format.  */
+    _bfd_bool_bfd_false_error,
+    coff_mkobject,
+    _bfd_generic_mkarchive,
+    _bfd_bool_bfd_false_error
+  },
+  {				/* bfd_write_contents.  */
+    _bfd_bool_bfd_false_error,
+    coff_write_object_contents,
+    _bfd_write_archive_contents,
+    _bfd_bool_bfd_false_error
+  },
+
+  BFD_JUMP_TABLE_GENERIC (coff),
+  BFD_JUMP_TABLE_COPY (coff),
+  BFD_JUMP_TABLE_CORE (_bfd_nocore),
+  BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
+  BFD_JUMP_TABLE_SYMBOLS (coff),
+  BFD_JUMP_TABLE_RELOCS (coff),
+  BFD_JUMP_TABLE_WRITE (coff),
+  BFD_JUMP_TABLE_LINK (coff),
+  BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
+
+  NULL,
+
+  COFF_SWAP_TABLE
+};
diff --git a/bfd/coffcode.h b/bfd/coffcode.h
index d5d9153..86e9561 100644
--- a/bfd/coffcode.h
+++ b/bfd/coffcode.h
@@ -2221,6 +2221,12 @@ coff_set_arch_mach_hook (bfd *abfd, void * filehdr)
 	}
       break;
 #endif
+#ifdef AARCH64MAGIC
+    case AARCH64MAGIC:
+      arch = bfd_arch_aarch64;
+      machine = internal_f->f_flags & F_AARCH64_ARCHITECTURE_MASK;
+      break;
+#endif
 #ifdef Z80MAGIC
     case Z80MAGIC:
       arch = bfd_arch_z80;
@@ -2777,6 +2783,12 @@ coff_set_flags (bfd * abfd,
       return true;
 #endif
 
+#ifdef AARCH64MAGIC
+    case bfd_arch_aarch64:
+      * magicp = AARCH64MAGIC;
+      return true;
+#endif
+
 #ifdef ARMMAGIC
     case bfd_arch_arm:
 #ifdef ARM_WINCE
@@ -3872,7 +3884,7 @@ coff_write_object_contents (bfd * abfd)
     internal_f.f_flags |= IMAGE_FILE_LARGE_ADDRESS_AWARE;
 #endif
 
-#ifndef COFF_WITH_pex64
+#if !defined(COFF_WITH_pex64) && !defined(COFF_WITH_peAArch64)
 #ifdef COFF_WITH_PE
   internal_f.f_flags |= IMAGE_FILE_32BIT_MACHINE;
 #else
@@ -3921,6 +3933,11 @@ coff_write_object_contents (bfd * abfd)
     internal_a.magic = ZMAGIC;
 #endif
 
+#if defined(AARCH64)
+#define __A_MAGIC_SET__
+    internal_a.magic = ZMAGIC;
+#endif
+
 #if defined MCORE_PE
 #define __A_MAGIC_SET__
     internal_a.magic = IMAGE_NT_OPTIONAL_HDR_MAGIC;
diff --git a/bfd/config.bfd b/bfd/config.bfd
index ab51257..7546a73 100644
--- a/bfd/config.bfd
+++ b/bfd/config.bfd
@@ -247,7 +247,7 @@ case "${targ}" in
     ;;
   aarch64-*-elf | aarch64-*-rtems* | aarch64-*-genode*)
     targ_defvec=aarch64_elf64_le_vec
-    targ_selvecs="aarch64_elf64_be_vec aarch64_elf32_le_vec aarch64_elf32_be_vec arm_elf32_le_vec arm_elf32_be_vec"
+    targ_selvecs="aarch64_elf64_be_vec aarch64_elf32_le_vec aarch64_elf32_be_vec arm_elf32_le_vec arm_elf32_be_vec aarch64_pei_vec"
     want64=true
     ;;
   aarch64_be-*-elf)
diff --git a/bfd/configure b/bfd/configure
index cae69d4..21bc018 100755
--- a/bfd/configure
+++ b/bfd/configure
@@ -13256,6 +13256,7 @@ do
     aarch64_elf64_le_vec)	   tb="$tb elf64-aarch64.lo elfxx-aarch64.lo elf-ifunc.lo elf64.lo $elf"; target_size=64 ;;
     aarch64_elf64_le_cloudabi_vec) tb="$tb elf64-aarch64.lo elfxx-aarch64.lo elf-ifunc.lo elf64.lo $elf"; target_size=64 ;;
     aarch64_mach_o_vec)		 tb="$tb mach-o-aarch64.lo"; target_size=64 ;;
+    aarch64_pei_vec)		 tb="$tb pei-aarch64.lo pe-aarch64igen.lo $coff"; target_size=64 ;;
     alpha_ecoff_le_vec)		 tb="$tb coff-alpha.lo ecoff.lo $ecoff"; target_size=64 ;;
     alpha_elf64_vec)		 tb="$tb elf64-alpha.lo elf64.lo $elf"; target_size=64 ;;
     alpha_elf64_fbsd_vec)	 tb="$tb elf64-alpha.lo elf64.lo $elf"; target_size=64 ;;
diff --git a/bfd/configure.ac b/bfd/configure.ac
index 9ff303a..24b5fd1 100644
--- a/bfd/configure.ac
+++ b/bfd/configure.ac
@@ -436,6 +436,7 @@ do
     aarch64_elf64_le_vec)	   tb="$tb elf64-aarch64.lo elfxx-aarch64.lo elf-ifunc.lo elf64.lo $elf"; target_size=64 ;;
     aarch64_elf64_le_cloudabi_vec) tb="$tb elf64-aarch64.lo elfxx-aarch64.lo elf-ifunc.lo elf64.lo $elf"; target_size=64 ;;
     aarch64_mach_o_vec)		 tb="$tb mach-o-aarch64.lo"; target_size=64 ;;
+    aarch64_pei_vec)		 tb="$tb pei-aarch64.lo pe-aarch64igen.lo $coff"; target_size=64 ;;
     alpha_ecoff_le_vec)		 tb="$tb coff-alpha.lo ecoff.lo $ecoff"; target_size=64 ;;
     alpha_elf64_vec)		 tb="$tb elf64-alpha.lo elf64.lo $elf"; target_size=64 ;;
     alpha_elf64_fbsd_vec)	 tb="$tb elf64-alpha.lo elf64.lo $elf"; target_size=64 ;;
diff --git a/bfd/libpei.h b/bfd/libpei.h
index 4de0c9f..26589e8 100644
--- a/bfd/libpei.h
+++ b/bfd/libpei.h
@@ -275,6 +275,41 @@
 #define _bfd_XXi_write_codeview_record			_bfd_pepi_write_codeview_record
 #define _bfd_XXi_slurp_codeview_record			_bfd_pepi_slurp_codeview_record
 
+#elif defined COFF_WITH_peAArch64
+
+#define GET_OPTHDR_IMAGE_BASE		 H_GET_64
+#define PUT_OPTHDR_IMAGE_BASE		 H_PUT_64
+#define GET_OPTHDR_SIZE_OF_STACK_RESERVE H_GET_64
+#define PUT_OPTHDR_SIZE_OF_STACK_RESERVE H_PUT_64
+#define GET_OPTHDR_SIZE_OF_STACK_COMMIT	 H_GET_64
+#define PUT_OPTHDR_SIZE_OF_STACK_COMMIT	 H_PUT_64
+#define GET_OPTHDR_SIZE_OF_HEAP_RESERVE	 H_GET_64
+#define PUT_OPTHDR_SIZE_OF_HEAP_RESERVE	 H_PUT_64
+#define GET_OPTHDR_SIZE_OF_HEAP_COMMIT	 H_GET_64
+#define PUT_OPTHDR_SIZE_OF_HEAP_COMMIT	 H_PUT_64
+#define GET_PDATA_ENTRY			 bfd_get_32
+
+#define _bfd_XX_bfd_copy_private_bfd_data_common	_bfd_peAArch64_bfd_copy_private_bfd_data_common
+#define _bfd_XX_bfd_copy_private_section_data		_bfd_peAArch64_bfd_copy_private_section_data
+#define _bfd_XX_get_symbol_info				_bfd_peAArch64_get_symbol_info
+#define _bfd_XX_only_swap_filehdr_out			_bfd_peAArch64_only_swap_filehdr_out
+#define _bfd_XX_print_private_bfd_data_common		_bfd_peAArch64_print_private_bfd_data_common
+#define _bfd_XXi_final_link_postscript			_bfd_peAArch64i_final_link_postscript
+#define _bfd_XXi_only_swap_filehdr_out			_bfd_peAArch64i_only_swap_filehdr_out
+#define _bfd_XXi_swap_aouthdr_in			_bfd_peAArch64i_swap_aouthdr_in
+#define _bfd_XXi_swap_aouthdr_out			_bfd_peAArch64i_swap_aouthdr_out
+#define _bfd_XXi_swap_aux_in				_bfd_peAArch64i_swap_aux_in
+#define _bfd_XXi_swap_aux_out				_bfd_peAArch64i_swap_aux_out
+#define _bfd_XXi_swap_lineno_in				_bfd_peAArch64i_swap_lineno_in
+#define _bfd_XXi_swap_lineno_out			_bfd_peAArch64i_swap_lineno_out
+#define _bfd_XXi_swap_scnhdr_out			_bfd_peAArch64i_swap_scnhdr_out
+#define _bfd_XXi_swap_sym_in				_bfd_peAArch64i_swap_sym_in
+#define _bfd_XXi_swap_sym_out				_bfd_peAArch64i_swap_sym_out
+#define _bfd_XXi_swap_debugdir_in			_bfd_peAArch64i_swap_debugdir_in
+#define _bfd_XXi_swap_debugdir_out			_bfd_peAArch64i_swap_debugdir_out
+#define _bfd_XXi_write_codeview_record			_bfd_peAArch64i_write_codeview_record
+#define _bfd_XXi_slurp_codeview_record			_bfd_peAArch64i_slurp_codeview_record
+
 #else /* !COFF_WITH_pep */
 
 #define GET_OPTHDR_IMAGE_BASE H_GET_32
@@ -369,5 +404,6 @@ bool _bfd_XX_bfd_copy_private_section_data
 bool _bfd_pe_print_ce_compressed_pdata (bfd *, void *);
 bool _bfd_pe64_print_ce_compressed_pdata (bfd *, void *);
 bool _bfd_pex64_print_ce_compressed_pdata (bfd *, void *);
+bool _bfd_peAArch64_print_ce_compressed_pdata (bfd *, void *);
 bool _bfd_pep_print_ce_compressed_pdata (bfd *, void *);
 
diff --git a/bfd/peXXigen.c b/bfd/peXXigen.c
index c41c329..1bfd6c8 100644
--- a/bfd/peXXigen.c
+++ b/bfd/peXXigen.c
@@ -60,8 +60,9 @@
    on this code has a chance of getting something accomplished without
    wasting too much time.  */
 
-/* This expands into COFF_WITH_pe, COFF_WITH_pep, or COFF_WITH_pex64
-   depending on whether we're compiling for straight PE or PE+.  */
+/* This expands into COFF_WITH_pe, COFF_WITH_pep, COFF_WITH_pex64 or
+   COFF_WITH_peAArch64 depending on whether we're compiling for straight
+   PE or PE+.  */
 #define COFF_WITH_XX
 
 #include "sysdep.h"
@@ -83,6 +84,8 @@
 # include "coff/x86_64.h"
 #elif defined COFF_WITH_pep
 # include "coff/ia64.h"
+#elif defined COFF_WITH_peAArch64
+# include "coff/aarch64.h"
 #else
 # include "coff/i386.h"
 #endif
@@ -92,7 +95,7 @@
 #include "libpei.h"
 #include "safe-ctype.h"
 
-#if defined COFF_WITH_pep || defined COFF_WITH_pex64
+#if defined COFF_WITH_pep || defined COFF_WITH_pex64 || defined COFF_WITH_peAArch64
 # undef AOUTSZ
 # define AOUTSZ		PEPAOUTSZ
 # define PEAOUTHDR	PEPAOUTHDR
@@ -469,7 +472,7 @@ _bfd_XXi_swap_aouthdr_in (bfd * abfd,
   aouthdr_int->text_start =
     GET_AOUTHDR_TEXT_START (abfd, aouthdr_ext->text_start);
 
-#if !defined(COFF_WITH_pep) && !defined(COFF_WITH_pex64)
+#if !defined(COFF_WITH_pep) && !defined(COFF_WITH_pex64) && !defined(COFF_WITH_peAArch64)
   /* PE32+ does not have data_start member!  */
   aouthdr_int->data_start =
     GET_AOUTHDR_DATA_START (abfd, aouthdr_ext->data_start);
@@ -555,7 +558,7 @@ _bfd_XXi_swap_aouthdr_in (bfd * abfd,
   if (aouthdr_int->entry)
     {
       aouthdr_int->entry += a->ImageBase;
-#if !defined(COFF_WITH_pep) && !defined(COFF_WITH_pex64)
+#if !defined(COFF_WITH_pep) && !defined(COFF_WITH_pex64) && !defined(COFF_WITH_peAArch64)
       aouthdr_int->entry &= 0xffffffff;
 #endif
     }
@@ -563,12 +566,12 @@ _bfd_XXi_swap_aouthdr_in (bfd * abfd,
   if (aouthdr_int->tsize)
     {
       aouthdr_int->text_start += a->ImageBase;
-#if !defined(COFF_WITH_pep) && !defined(COFF_WITH_pex64)
+#if !defined(COFF_WITH_pep) && !defined(COFF_WITH_pex64) && !defined(COFF_WITH_peAArch64)
       aouthdr_int->text_start &= 0xffffffff;
 #endif
     }
 
-#if !defined(COFF_WITH_pep) && !defined(COFF_WITH_pex64)
+#if !defined(COFF_WITH_pep) && !defined(COFF_WITH_pex64) && !defined(COFF_WITH_peAArch64)
   /* PE32+ does not have data_start member!  */
   if (aouthdr_int->dsize)
     {
@@ -628,7 +631,7 @@ _bfd_XXi_swap_aouthdr_out (bfd * abfd, void * in, void * out)
   if (aouthdr_in->tsize)
     {
       aouthdr_in->text_start -= ib;
-#if !defined(COFF_WITH_pep) && !defined(COFF_WITH_pex64)
+#if !defined(COFF_WITH_pep) && !defined(COFF_WITH_pex64) && !defined(COFF_WITH_peAArch64)
       aouthdr_in->text_start &= 0xffffffff;
 #endif
     }
@@ -636,7 +639,7 @@ _bfd_XXi_swap_aouthdr_out (bfd * abfd, void * in, void * out)
   if (aouthdr_in->dsize)
     {
       aouthdr_in->data_start -= ib;
-#if !defined(COFF_WITH_pep) && !defined(COFF_WITH_pex64)
+#if !defined(COFF_WITH_pep) && !defined(COFF_WITH_pex64) && !defined(COFF_WITH_peAArch64)
       aouthdr_in->data_start &= 0xffffffff;
 #endif
     }
@@ -644,7 +647,7 @@ _bfd_XXi_swap_aouthdr_out (bfd * abfd, void * in, void * out)
   if (aouthdr_in->entry)
     {
       aouthdr_in->entry -= ib;
-#if !defined(COFF_WITH_pep) && !defined(COFF_WITH_pex64)
+#if !defined(COFF_WITH_pep) && !defined(COFF_WITH_pex64) && !defined(COFF_WITH_peAArch64)
       aouthdr_in->entry &= 0xffffffff;
 #endif
     }
@@ -748,7 +751,7 @@ _bfd_XXi_swap_aouthdr_out (bfd * abfd, void * in, void * out)
   PUT_AOUTHDR_TEXT_START (abfd, aouthdr_in->text_start,
 			  aouthdr_out->standard.text_start);
 
-#if !defined(COFF_WITH_pep) && !defined(COFF_WITH_pex64)
+#if !defined(COFF_WITH_pep) && !defined(COFF_WITH_pex64) && !defined(COFF_WITH_peAArch64)
   /* PE32+ does not have data_start member!  */
   PUT_AOUTHDR_DATA_START (abfd, aouthdr_in->data_start,
 			  aouthdr_out->standard.data_start);
@@ -1800,7 +1803,7 @@ pe_print_edata (bfd * abfd, void * vfile)
 static bool
 pe_print_pdata (bfd * abfd, void * vfile)
 {
-#if defined(COFF_WITH_pep) && !defined(COFF_WITH_pex64)
+#if defined(COFF_WITH_pep) && !defined(COFF_WITH_pex64) && !defined(COFF_WITH_peAArch64)
 # define PDATA_ROW_SIZE	(3 * 8)
 #else
 # define PDATA_ROW_SIZE	(5 * 4)
@@ -1827,7 +1830,7 @@ pe_print_pdata (bfd * abfd, void * vfile)
 
   fprintf (file,
 	   _("\nThe Function Table (interpreted .pdata section contents)\n"));
-#if defined(COFF_WITH_pep) && !defined(COFF_WITH_pex64)
+#if defined(COFF_WITH_pep) && !defined(COFF_WITH_pex64) && !defined(COFF_WITH_peAArch64)
   fprintf (file,
 	   _(" vma:\t\t\tBegin Address    End Address      Unwind Info\n"));
 #else
@@ -1864,7 +1867,7 @@ pe_print_pdata (bfd * abfd, void * vfile)
       bfd_vma eh_handler;
       bfd_vma eh_data;
       bfd_vma prolog_end_addr;
-#if !defined(COFF_WITH_pep) || defined(COFF_WITH_pex64)
+#if !defined(COFF_WITH_pep) || defined(COFF_WITH_pex64) || defined(COFF_WITH_peAArch64)
       int em_data;
 #endif
 
@@ -1882,7 +1885,7 @@ pe_print_pdata (bfd * abfd, void * vfile)
 	/* We are probably into the padding of the section now.  */
 	break;
 
-#if !defined(COFF_WITH_pep) || defined(COFF_WITH_pex64)
+#if !defined(COFF_WITH_pep) || defined(COFF_WITH_pex64) || defined(COFF_WITH_peAArch64)
       em_data = ((eh_handler & 0x1) << 2) | (prolog_end_addr & 0x3);
 #endif
       eh_handler &= ~(bfd_vma) 0x3;
@@ -1893,7 +1896,7 @@ pe_print_pdata (bfd * abfd, void * vfile)
       bfd_fprintf_vma (abfd, file, begin_addr); fputc (' ', file);
       bfd_fprintf_vma (abfd, file, end_addr); fputc (' ', file);
       bfd_fprintf_vma (abfd, file, eh_handler);
-#if !defined(COFF_WITH_pep) || defined(COFF_WITH_pex64)
+#if !defined(COFF_WITH_pep) || defined(COFF_WITH_pex64) || defined(COFF_WITH_peAArch64)
       fputc (' ', file);
       bfd_fprintf_vma (abfd, file, eh_data); fputc (' ', file);
       bfd_fprintf_vma (abfd, file, prolog_end_addr);
@@ -2784,7 +2787,7 @@ _bfd_XX_print_private_bfd_data_common (bfd * abfd, void * vfile)
   bfd_fprintf_vma (abfd, file, i->AddressOfEntryPoint);
   fprintf (file, "\nBaseOfCode\t\t");
   bfd_fprintf_vma (abfd, file, i->BaseOfCode);
-#if !defined(COFF_WITH_pep) && !defined(COFF_WITH_pex64)
+#if !defined(COFF_WITH_pep) && !defined(COFF_WITH_pex64) && !defined(COFF_WITH_peAArch64)
   /* PE32+ does not have BaseOfData member!  */
   fprintf (file, "\nBaseOfData\t\t");
   bfd_fprintf_vma (abfd, file, i->BaseOfData);
@@ -3085,7 +3088,7 @@ _bfd_XX_get_symbol_info (bfd * abfd, asymbol *symbol, symbol_info *ret)
   coff_get_symbol_info (abfd, symbol, ret);
 }
 
-#if !defined(COFF_WITH_pep) && defined(COFF_WITH_pex64)
+#if !defined(COFF_WITH_pep) && defined(COFF_WITH_pex64) && defined(COFF_WITH_peAArch64)
 static int
 sort_x64_pdata (const void *l, const void *r)
 {
@@ -4504,7 +4507,7 @@ _bfd_XXi_final_link_postscript (bfd * abfd, struct coff_final_link_info *pfinfo)
 	the TLS data directory consists of 4 pointers, followed
 	by two 4-byte integer. This implies that the total size
 	is different for 32-bit and 64-bit executables.  */
-#if !defined(COFF_WITH_pep) && !defined(COFF_WITH_pex64)
+#if !defined(COFF_WITH_pep) && !defined(COFF_WITH_pex64) && !defined(COFF_WITH_peAArch64)
       pe_data (abfd)->pe_opthdr.DataDirectory[PE_TLS_TABLE].Size = 0x18;
 #else
       pe_data (abfd)->pe_opthdr.DataDirectory[PE_TLS_TABLE].Size = 0x28;
@@ -4513,7 +4516,7 @@ _bfd_XXi_final_link_postscript (bfd * abfd, struct coff_final_link_info *pfinfo)
 
 /* If there is a .pdata section and we have linked pdata finally, we
      need to sort the entries ascending.  */
-#if !defined(COFF_WITH_pep) && defined(COFF_WITH_pex64)
+#if !defined(COFF_WITH_pep) && defined(COFF_WITH_pex64) && defined(COFF_WITH_peAArch64)
   {
     asection *sec = bfd_get_section_by_name (abfd, ".pdata");
 
diff --git a/bfd/pei-aarch64.c b/bfd/pei-aarch64.c
new file mode 100644
index 0000000..99326d1
--- /dev/null
+++ b/bfd/pei-aarch64.c
@@ -0,0 +1,75 @@
+/* BFD back-end for AArch64 PE IMAGE COFF files.
+   Copyright (C) 2021 Free Software Foundation, Inc.
+
+   This file is part of BFD, the Binary File Descriptor library.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+   MA 02110-1301, USA.  */
+
+#include "sysdep.h"
+#include "bfd.h"
+
+#define TARGET_SYM		aarch64_pei_vec
+#define TARGET_NAME		"pei-aarch64-little"
+#define TARGET_ARCHITECTURE	bfd_arch_aarch64
+#define TARGET_PAGESIZE		4096
+#define TARGET_BIG_ENDIAN	0
+#define TARGET_ARCHIVE		0
+#define TARGET_PRIORITY		0
+
+#define COFF_IMAGE_WITH_PE
+/* Rename the above into.. */
+#define COFF_WITH_peAArch64
+#define COFF_WITH_PE
+#define PCRELOFFSET	   true
+
+/* Long section names not allowed in executable images, only object files.  */
+#define COFF_LONG_SECTION_NAMES 0
+
+#define COFF_SECTION_ALIGNMENT_ENTRIES \
+{ COFF_SECTION_NAME_EXACT_MATCH (".bss"), \
+  COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 2 }, \
+{ COFF_SECTION_NAME_EXACT_MATCH (".data"), \
+  COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 2 }, \
+{ COFF_SECTION_NAME_EXACT_MATCH (".rdata"), \
+  COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 2 }, \
+{ COFF_SECTION_NAME_EXACT_MATCH (".text"), \
+  COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 2 }, \
+{ COFF_SECTION_NAME_PARTIAL_MATCH (".idata"), \
+  COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 2 }, \
+{ COFF_SECTION_NAME_EXACT_MATCH (".pdata"), \
+  COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 2 }, \
+{ COFF_SECTION_NAME_PARTIAL_MATCH (".debug"), \
+  COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 0 }, \
+{ COFF_SECTION_NAME_PARTIAL_MATCH (".gnu.linkonce.wi."), \
+  COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 0 }
+
+#define PEI_HEADERS
+#include "sysdep.h"
+#include "bfd.h"
+#include "libbfd.h"
+#include "coff/aarch64.h"
+#include "coff/internal.h"
+#include "coff/pe.h"
+#include "libcoff.h"
+#include "libpei.h"
+#include "libiberty.h"
+
+/* Make sure we're setting a 64-bit format.  */
+#undef AOUTSZ
+#define AOUTSZ          PEPAOUTSZ
+#define PEAOUTHDR       PEPAOUTHDR
+
+#include "coff-aarch64.c"
diff --git a/bfd/peicode.h b/bfd/peicode.h
index c84b135..9374e23 100644
--- a/bfd/peicode.h
+++ b/bfd/peicode.h
@@ -231,7 +231,7 @@ coff_swap_scnhdr_in (bfd * abfd, void * ext, void * in)
     {
       scnhdr_int->s_vaddr += pe_data (abfd)->pe_opthdr.ImageBase;
       /* Do not cut upper 32-bits for 64-bit vma.  */
-#ifndef COFF_WITH_pex64
+#if !defined(COFF_WITH_pex64) && !defined(COFF_WITH_peAArch64)
       scnhdr_int->s_vaddr &= 0xffffffff;
 #endif
     }
@@ -738,6 +738,16 @@ static const jump_table jtab[] =
   },
 #endif
 
+#ifdef AARCH64MAGIC
+/* We don't currently support jumping to DLLs, so if
+   someone does try emit a runtime trap.  Through UDF #0.  */
+  { AARCH64MAGIC,
+    { 0x00, 0x00, 0x00, 0x00 },
+    4, 0
+  },
+
+#endif
+
 #ifdef  ARMPEMAGIC
   { ARMPEMAGIC,
     { 0x00, 0xc0, 0x9f, 0xe5, 0x00, 0xf0,
@@ -910,7 +920,7 @@ pe_ILF_build_a_bfd (bfd *	    abfd,
 	/* See PR 20907 for a reproducer.  */
 	goto error_return;
 
-#ifdef COFF_WITH_pex64
+#if defined(COFF_WITH_pex64) || defined(COFF_WITH_peAArch64)
       ((unsigned int *) id4->contents)[0] = ordinal;
       ((unsigned int *) id4->contents)[1] = 0x80000000;
       ((unsigned int *) id5->contents)[0] = ordinal;
@@ -1206,6 +1216,12 @@ pe_ILF_object_p (bfd * abfd)
 #endif
       break;
 
+    case IMAGE_FILE_MACHINE_ARM64:
+#ifdef AARCH64MAGIC
+      magic = AARCH64MAGIC;
+#endif
+      break;
+
     case IMAGE_FILE_MACHINE_THUMB:
 #ifdef THUMBPEMAGIC
       {
diff --git a/bfd/targets.c b/bfd/targets.c
index 89b49e7..ae6075b 100644
--- a/bfd/targets.c
+++ b/bfd/targets.c
@@ -679,6 +679,7 @@ extern const bfd_target aarch64_elf64_be_cloudabi_vec;
 extern const bfd_target aarch64_elf64_le_vec;
 extern const bfd_target aarch64_elf64_le_cloudabi_vec;
 extern const bfd_target aarch64_mach_o_vec;
+extern const bfd_target aarch64_pei_vec;
 extern const bfd_target alpha_ecoff_le_vec;
 extern const bfd_target alpha_elf64_vec;
 extern const bfd_target alpha_elf64_fbsd_vec;
@@ -991,6 +992,7 @@ static const bfd_target * const _bfd_target_vector[] =
 	&aarch64_elf64_le_vec,
 	&aarch64_elf64_le_cloudabi_vec,
 	&aarch64_mach_o_vec,
+	&aarch64_pei_vec,
 #endif
 
 #ifdef BFD64
diff --git a/binutils/objcopy.c b/binutils/objcopy.c
index a6c2e0d..fe3ea29 100644
--- a/binutils/objcopy.c
+++ b/binutils/objcopy.c
@@ -4987,6 +4987,13 @@ convert_efi_target (char *efi)
       /* Change x86_64 to x86-64.  */
       efi[7] = '-';
     }
+  else if (strcmp (efi + 4, "aarch64") == 0)
+    {
+      /* Change aarch64 to aarch64-little.  */
+      efi = (char *) xrealloc (efi, strlen (efi) + 7);
+      char *t = "aarch64-little";
+      strcpy (efi + 4, t);
+    }
 }
 
 /* Allocate and return a pointer to a struct section_add, initializing the
diff --git a/binutils/testsuite/binutils-all/aarch64/pei-aarch64-little.d b/binutils/testsuite/binutils-all/aarch64/pei-aarch64-little.d
new file mode 100644
index 0000000..0957c98
--- /dev/null
+++ b/binutils/testsuite/binutils-all/aarch64/pei-aarch64-little.d
@@ -0,0 +1,16 @@
+#skip: aarch64_be-*-*
+#ld: -e0
+#PROG: objcopy
+#objcopy: -j .text -j .sdata -j .data -j .dynamic -j .dynsym -j .rel -j .rela -j .rel.* -j .rela.* -j .rel* -j .rela* -j .reloc --target=efi-app-aarch64
+#objdump: -h -f
+#name: Check if efi app format is recognized
+
+.*:     file format pei-aarch64-little
+architecture: aarch64, flags 0x00000132:
+EXEC_P, HAS_SYMS, HAS_LOCALS, D_PAGED
+start address 0x0000000000000000
+
+Sections:
+Idx Name          Size      VMA               LMA               File off  Algn
+  0 \.text         00000030  0000000000400000  0000000000400000  00000200  2\*\*2
+                  CONTENTS, ALLOC, LOAD, READONLY, CODE
diff --git a/binutils/testsuite/binutils-all/aarch64/pei-aarch64-little.s b/binutils/testsuite/binutils-all/aarch64/pei-aarch64-little.s
new file mode 100644
index 0000000..dafc5fa
--- /dev/null
+++ b/binutils/testsuite/binutils-all/aarch64/pei-aarch64-little.s
@@ -0,0 +1,42 @@
+	.arch armv8-a
+	.text
+	.align	2
+	.global	foo
+	.type	foo, %function
+foo:
+.LFB0:
+	.cfi_startproc
+	sub	sp, sp, #16
+	.cfi_def_cfa_offset 16
+	str	w0, [sp, 12]
+	ldr	w0, [sp, 12]
+	mul	w0, w0, w0
+	add	sp, sp, 16
+	.cfi_def_cfa_offset 0
+	ret
+	.cfi_endproc
+.LFE0:
+	.size	foo, .-foo
+	.align	2
+	.global	main
+	.type	main, %function
+main:
+.LFB1:
+	.cfi_startproc
+	stp	x29, x30, [sp, -16]!
+	.cfi_def_cfa_offset 16
+	.cfi_offset 29, -16
+	.cfi_offset 30, -8
+	mov	x29, sp
+	mov	w0, 5
+	bl	foo
+	ldp	x29, x30, [sp], 16
+	.cfi_restore 30
+	.cfi_restore 29
+	.cfi_def_cfa_offset 0
+	ret
+	.cfi_endproc
+.LFE1:
+	.size	main, .-main
+	.ident	"GCC: (fsf-trunk.2870) 12.0.0 20210930 (experimental)"
+	.section	.note.GNU-stack,"",@progbits
diff --git a/include/coff/aarch64.h b/include/coff/aarch64.h
new file mode 100644
index 0000000..2c21f0d
--- /dev/null
+++ b/include/coff/aarch64.h
@@ -0,0 +1,63 @@
+/* AArch64 COFF support for BFD.
+   Copyright (C) 2021 Free Software Foundation, Inc.
+
+   This file is part of BFD, the Binary File Descriptor library.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#define COFFAARCH64 1
+
+#define L_LNNO_SIZE 2
+#define INCLUDE_COMDAT_FIELDS_IN_AUXENT
+#include "coff/external.h"
+
+#define F_AARCH64_ARCHITECTURE_MASK	(0x4000)
+
+#define	AARCH64MAGIC	0xaa64  /* From Microsoft specification. */
+
+#undef  BADMAG
+#define BADMAG(x) ((x).f_magic != AARCH64MAGIC)
+#define AARCH64         1                 /* Customize coffcode.h.  */
+
+#define IMAGE_NT_OPTIONAL_HDR64_MAGIC      0x20b
+
+#define OMAGIC          0404    /* Object files, eg as output.  */
+#define ZMAGIC          IMAGE_NT_OPTIONAL_HDR64_MAGIC    /* Demand load format, eg normal ld output 0x10b.  */
+#define STMAGIC		0401	/* Target shlib.  */
+#define SHMAGIC		0443	/* Host   shlib.  */
+
+/* define some NT default values */
+/*  #define NT_IMAGE_BASE        0x400000 moved to internal.h */
+#define NT_SECTION_ALIGNMENT 0x1000
+#define NT_FILE_ALIGNMENT    0x200
+#define NT_DEF_RESERVE       0x100000
+#define NT_DEF_COMMIT        0x1000
+
+/* We use the .rdata section to hold read only data.  */
+#define _LIT	".rdata"
+
+/********************** RELOCATION DIRECTIVES **********************/
+struct external_reloc
+{
+  char r_vaddr[4];
+  char r_symndx[4];
+  char r_type[2];
+  char r_offset[4];
+};
+
+#define RELOC struct external_reloc
+#define RELSZ 14
+
+#define ARM_NOTE_SECTION ".note"
diff --git a/include/coff/pe.h b/include/coff/pe.h
index 9e1ea4b..558cf0e 100644
--- a/include/coff/pe.h
+++ b/include/coff/pe.h
@@ -137,6 +137,7 @@
 #define IMAGE_FILE_MACHINE_AM33              0x01d3
 #define IMAGE_FILE_MACHINE_AMD64             0x8664
 #define IMAGE_FILE_MACHINE_ARM               0x01c0
+#define IMAGE_FILE_MACHINE_ARM64             0xaa64
 #define IMAGE_FILE_MACHINE_AXP64             IMAGE_FILE_MACHINE_ALPHA64
 #define IMAGE_FILE_MACHINE_CEE               0xc0ee
 #define IMAGE_FILE_MACHINE_CEF               0x0cef