Add basic support for RISC-V 64-bit EFI objects

This adds a new PEI target pei-riscv64-little.  Only objdump and objcopy
are supported.

bfd:
	* .gitignore: Add pe-riscv64igen.c.
	* Makefile.am (BFD64_BACKENDS): Add pei-riscv64.lo,
	pe-riscv64igen.lo.
	(BFD64_BACKENDS_CFILES): Add pei-riscv64.c.
	(BUILD_CFILES): Add pe-riscv64igen.c.
	(pe-riscv64igen.c): New rule.
	* Makefile.in: Regenerate.
	* bfd.c (bfd_get_sign_extend_vma): Add pei-riscv64-little.
	* coff-riscv64.c: New file.
	* coffcode.h (coff_set_arch_mach_hook, coff_set_flags)
	(coff_write_object_contents): Add riscv64 (riscv64_pei_vec)
	support.
	* config.bfd (targ_selvecs): Add riscv64_pei_vec to all riscv*
	targets.
	* configure.ac: Handle riscv64_pei_vec.
	* configure: Regenerate.
	* 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_XX_bfd_copy_private_bfd_data_common)
	(_bfd_XX_bfd_copy_private_section_data)
	(_bfd_XX_get_symbol_info, _bfd_XX_only_swap_filehdr_out)
	(_bfd_XX_print_private_bfd_data_common)
	(_bfd_XXi_final_link_postscript, _bfd_XXi_only_swap_filehdr_out)
	(_bfd_XXi_swap_aouthdr_in, _bfd_XXi_swap_aouthdr_out)
	(_bfd_XXi_swap_aux_in, _bfd_XXi_swap_aux_out)
	(_bfd_XXi_swap_lineno_in, _bfd_XXi_swap_lineno_out)
	(_bfd_XXi_swap_scnhdr_out, _bfd_XXi_swap_sym_in)
	(_bfd_XXi_swap_sym_out, _bfd_XXi_swap_debugdir_in)
	(_bfd_XXi_swap_debugdir_out, _bfd_XXi_write_codeview_record)
	(_bfd_XXi_slurp_codeview_record) [COFF_WITH_peRiscV64]: Define.
	(_bfd_peRiscV64_print_ce_compressed_pdata): Declare.
	* 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_peRiscV64.
	* pei-riscv64.c: New file.
	* peicode.h (coff_swap_scnhdr_in, pe_ILF_build_a_bfd)
	(pe_ILF_object_p): Support COFF_WITH_peRiscV64.
	(jtab): Add dummy entry that traps.
	* targets.c (_bfd_target_vector): Add riscv64_pei_vec.

binutils:
	* testsuite/binutils-all/riscv/pei-riscv64.d: New.
	* testsuite/binutils-all/riscv/pei-riscv64.s: New.

include:
	* coff/riscv64.h: New file.
	* coff/pe.h (IMAGE_FILE_MACHINE_RISCV32)
	(IMAGE_FILE_MACHINE_RISCV64): Define.

2 files changed, 66 insertions, 0 deletions

diff --git a/include/coff/pe.h b/include/coff/pe.h
index 7e69e6f..ab60a68 100644
--- a/include/coff/pe.h
+++ b/include/coff/pe.h
@@ -156,6 +156,8 @@
 #define IMAGE_FILE_MACHINE_R10000            0x0168
 #define IMAGE_FILE_MACHINE_R3000             0x0162
 #define IMAGE_FILE_MACHINE_R4000             0x0166
+#define IMAGE_FILE_MACHINE_RISCV32           0x5032
+#define IMAGE_FILE_MACHINE_RISCV64           0x5064
 #define IMAGE_FILE_MACHINE_SH3               0x01a2
 #define IMAGE_FILE_MACHINE_SH3DSP            0x01a3
 #define IMAGE_FILE_MACHINE_SH3E              0x01a4
diff --git a/include/coff/riscv64.h b/include/coff/riscv64.h
new file mode 100644
index 0000000..614d743
--- /dev/null
+++ b/include/coff/riscv64.h
@@ -0,0 +1,64 @@
+/* RISC-V 64-bit COFF support for BFD.
+   Copyright (C) 2023 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_RISCV64_H
+#define COFF_RISCV64_H
+
+#define COFFRISCV64 1
+
+#define L_LNNO_SIZE 2
+#define INCLUDE_COMDAT_FIELDS_IN_AUXENT
+#include "coff/external.h"
+
+#define	RISCV64MAGIC	0x5064  /* From Microsoft specification. */
+
+#undef  BADMAG
+#define BADMAG(x) ((x).f_magic != RISCV64MAGIC)
+#define RISCV64         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
+
+#endif /* COFF_RISCV64_H */