bfd: Add support for LoongArch64 EFI (efi-*-loongarch64).

This adds support for efi-loongarch64 by virtue of adding a new PEI target
pei-loongarch64.  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 loongarch64 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.

We should't limit addresses to 32-bits for 64-bit vma, otherwise there will be
"RVA truncated" error when using objcopy on loongarch64.

With these changes the resulting file is recognized as an efi image.

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

The test results are as follows:
$ make check-binutils RUNTESTFLAGS='loongarch64.exp'
  PASS: Check if efi app format is recognized

$ objdump -h -f tmpdir/loongarch64copy.o
  tmpdir/loongarch64copy.o:     file format pei-loongarch64
  architecture: Loongarch64, flags 0x00000132:
  EXEC_P, HAS_SYMS, HAS_LOCALS, D_PAGED
  start address 0x0000000000000000

  Sections:
  Idx Name          Size      VMA               LMA               File off  Algn
    0 .text         0000003c  00000000200000b0  00000000200000b0  00000200  2**2
                    CONTENTS, ALLOC, LOAD, READONLY, CODE

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

bfd:
  * .gitignore (pe-loongarch64igen.c): New.
  * Makefile.am (pei-loongarch64.lo, pe-loongarch64igen.lo, pei-loongarch64.c,
  pe-loongarch64igen.c): Add support.
  * Makefile.in: Likewise.
  * bfd.c (bfd_get_sign_extend_vma): Add pei-loongarch64.
  * coff-loongarch64.c: New file.
  * coffcode.h (coff_set_arch_mach_hook, coff_set_flags,
  coff_write_object_contents) Add loongarch64 (loongarch64_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_peLoongArch64_bfd_copy_private_bfd_data_common,
  _bfd_peLoongArch64_bfd_copy_private_section_data,
  _bfd_peLoongArch64_get_symbol_info, _bfd_peLoongArch64_only_swap_filehdr_out,
  _bfd_peLoongArch64_print_private_bfd_data_common,
  _bfd_peLoongArch64i_final_link_postscript,
  _bfd_peLoongArch64i_only_swap_filehdr_out, _bfd_peLoongArch64i_swap_aouthdr_in,
  _bfd_peLoongArch64i_swap_aouthdr_out, _bfd_peLoongArch64i_swap_aux_in,
  _bfd_peLoongArch64i_swap_aux_out, _bfd_peLoongArch64i_swap_lineno_in,
  _bfd_peLoongArch64i_swap_lineno_out, _bfd_peLoongArch64i_swap_scnhdr_out,
  _bfd_peLoongArch64i_swap_sym_in, _bfd_peLoongArch64i_swap_sym_out,
  _bfd_peLoongArch64i_swap_debugdir_in, _bfd_peLoongArch64i_swap_debugdir_out,
  _bfd_peLoongArch64i_write_codeview_record,
  _bfd_peLoongArch64i_slurp_codeview_record,
  _bfd_peLoongArch64_print_ce_compressed_pdata): New.
  * peXXigen.c (_bfd_XXi_swap_aouthdr_in, _bfd_XXi_swap_aouthdr_out,
  _bfd_XXi_swap_scnhdr_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_peLoongArch64,
  * pei-loongarch64.c: New file.
  * peicode.h (coff_swap_scnhdr_in, pe_ILF_build_a_bfd, pe_ILF_object_p):
  Support COFF_WITH_peLoongArch64.
  (jtab): Add dummy entry that traps.
  * targets.c (loongarch64_pei_vec): New.

binutils
  * testsuite/binutils-all/loongarch64/loongarch64.exp: New file.
  * testsuite/binutils-all/loongarch64/pei-loongarch64.d: New test.
  * testsuite/binutils-all/loongarch64/pei-loongarch64.s: New test.

include
  * coff/loongarch64.h: New file.
  * coff/pe.h (IMAGE_FILE_MACHINE_LOONGARCH64): New.

Signed-off-by: Youling Tang <tangyouling@loongson.cn>

1 files changed, 165 insertions, 0 deletions

diff --git a/bfd/coff-loongarch64.c b/bfd/coff-loongarch64.c
new file mode 100644
index 0000000..8013737
--- /dev/null
+++ b/bfd/coff-loongarch64.c
@@ -0,0 +1,165 @@
+/* BFD back-end for LoongArch64 COFF files.
+   Copyright (C) 2022 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_peLoongArch64
+#define COFF_WITH_peLoongArch64
+#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/loongarch64.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 0x4000
+
+/* 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_loongarch64_std_reloc_howto[] =
+  {
+
+  };
+
+#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER  2
+
+#ifndef NUM_ELEM
+#define NUM_ELEM(a) ((sizeof (a)) / sizeof ((a)[0]))
+#endif
+
+#define NUM_RELOCS NUM_ELEM (pe_loongarch64_std_reloc_howto)
+
+#define RTYPE2HOWTO(cache_ptr, dst)             \
+  (cache_ptr)->howto = 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
+  loongarch64_pei_vec =
+#endif
+{
+#ifdef TARGET_NAME
+  TARGET_NAME,
+#else
+ "pei-loongarch64",			/* 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
+};