AArch64: Add support for AArch64 EFI (efi-*-aarch64).

This adds support for efi-*-aarch64 by virtue of adding a new PEI target
pei-aarch64-little.  This is not a full target 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.  This format has been added to elf based aarch64 targets
such that efi images can be made natively on Linux.

However this target is not valid for use with gas but only with objcopy.

With these changes the resulting file is recognized as an efi image by
third party tools:

>  pecli info hello.efi

Metadata
================================================================================
MD5:            598c32a778b0f0deebe977fef8578c4e
SHA1:           4580121edd5cb4dc40f51b28f171fd15250df84c
SHA256:         3154bd7cf42433d1c957f6bf55a17ad8c57ed41b29df2d485703349fd6ff1d5c
Imphash:
Size:           47561 bytes
Type:           PE32+ executable (EFI application) (stripped to external PDB), for MS Windows
Compile Time:   1970-01-01 00:00:00 (UTC - 0x0       )
Entry point:    0x2000 (section .text)

Sections
================================================================================
Name      RWX  VirtSize   VirtAddr   RawAddr   RawSize   Entropy  md5
.text     R-X  0x5bb0     0x2000     0x400     0x5c00      6.39 551fbc264256a3f387de8a891500ae0d
.reloc    R--  0xc        0x8000     0x6000    0x200       0.02 0c45f6d812d079821c1d54c09ab89e1d
.data     RW-  0x1d88     0x9000     0x6200    0x1e00      4.18 5d1137c09f01289dc62bf754f7290db3
.dynamic  RW-  0xf0       0xb000     0x8000    0x200       0.34 5c94ed3206f05a277e6f04fbf131f131
.rela     R--  0xe58      0xc000     0x8200    0x1000      1.87 8b5c6bc30f3acb7ca7bf2e6789d68519
.dynsym   R--  0x138      0xd000     0x9200    0x200       0.96 bdcf5101da51aadc663ca8859f88138c

Imports
================================================================================

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/26206
	* .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/26206
	* NEWS: Add new support.
	* 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/26206
	* coff/aarch64.h: New file.
	* coff/pe.h (IMAGE_FILE_MACHINE_ARM64): New.

1 files changed, 23 insertions, 20 deletions

diff --git a/bfd/peXXigen.c b/bfd/peXXigen.c
index e2a9cbb..5f977ea 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");