[thirdparty/binutils-gdb.git] / bfd / cpu-riscv.c

/* BFD backend for RISC-V
   Copyright (C) 2011-2020 Free Software Foundation, Inc.

   Contributed by Andrew Waterman (andrew@sifive.com).
   Based on MIPS target.

   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; see the file COPYING3. If not,
   see <http://www.gnu.org/licenses/>.  */

#include "sysdep.h"
#include "bfd.h"
#include "libbfd.h"

/* This routine is provided two arch_infos and returns an arch_info
   that is compatible with both, or NULL if none exists.  */

static const bfd_arch_info_type *
riscv_compatible (const bfd_arch_info_type *a, const bfd_arch_info_type *b)
{
  if (a->arch != b->arch)
    return NULL;

  /* Machine compatibility is checked in
     _bfd_riscv_elf_merge_private_bfd_data.  */

  return a;
}

/* Return TRUE if STRING matches the architecture described by INFO.  */

static bfd_boolean
riscv_scan (const struct bfd_arch_info *info, const char *string)
{
  if (bfd_default_scan (info, string))
    return TRUE;

  /* The string might have extra characters for supported subsets.  So allow
     a match that ignores trailing characters in string.  */
  if (strncasecmp (string, info->printable_name,
		   strlen (info->printable_name)) == 0)
    return TRUE;

  return FALSE;
}

#define N(BITS, NUMBER, PRINT, DEFAULT, NEXT)			\
  {								\
    BITS,      /* Bits in a word.  */				\
    BITS,      /* Bits in an address.  */			\
    8,	       /* Bits in a byte.  */				\
    bfd_arch_riscv,						\
    NUMBER,							\
    "riscv",							\
    PRINT,							\
    3,								\
    DEFAULT,							\
    riscv_compatible,						\
    riscv_scan,							\
    bfd_arch_default_fill,					\
    NEXT,							\
    0 /* Maximum offset of a reloc from the start of an insn.  */\
  }

/* This enum must be kept in the same order as arch_info_struct.  */
enum
{
  I_riscv64,
  I_riscv32
};

#define NN(index) (&arch_info_struct[(index) + 1])

/* This array must be kept in the same order as the anonymous enum above,
   and each entry except the last should end with NN (my enum value).  */
static const bfd_arch_info_type arch_info_struct[] =
{
  N (64, bfd_mach_riscv64, "riscv:rv64", FALSE, NN (I_riscv64)),
  N (32, bfd_mach_riscv32, "riscv:rv32", FALSE, NULL)
};

/* The default architecture is riscv:rv64.  */

const bfd_arch_info_type bfd_riscv_arch =
  N (64, 0, "riscv", TRUE, &arch_info_struct[0]);
Commit	Line	Data
e23eba97	1	/* BFD backend for RISC-V
b3adc24a	2	Copyright (C) 2011-2020 Free Software Foundation, Inc.
e23eba97 NC	3
	4	Contributed by Andrew Waterman (andrew@sifive.com).
	5	Based on MIPS target.
	6
	7	This file is part of BFD, the Binary File Descriptor library.
	8
	9	This program is free software; you can redistribute it and/or modify
	10	it under the terms of the GNU General Public License as published by
	11	the Free Software Foundation; either version 3 of the License, or
	12	(at your option) any later version.
	13
	14	This program is distributed in the hope that it will be useful,
	15	but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	GNU General Public License for more details.
	18
	19	You should have received a copy of the GNU General Public License
	20	along with this program; see the file COPYING3. If not,
	21	see <http://www.gnu.org/licenses/>. */
	22
	23	#include "sysdep.h"
	24	#include "bfd.h"
	25	#include "libbfd.h"
	26
	27	/* This routine is provided two arch_infos and returns an arch_info
	28	that is compatible with both, or NULL if none exists. */
	29
	30	static const bfd_arch_info_type *
	31	riscv_compatible (const bfd_arch_info_type a, const bfd_arch_info_type b)
	32	{
	33	if (a->arch != b->arch)
	34	return NULL;
	35
	36	/* Machine compatibility is checked in
	37	_bfd_riscv_elf_merge_private_bfd_data. */
	38
	39	return a;
	40	}
	41
c35d018b JW	42	/* Return TRUE if STRING matches the architecture described by INFO. */
	43
	44	static bfd_boolean
	45	riscv_scan (const struct bfd_arch_info info, const char string)
	46	{
	47	if (bfd_default_scan (info, string))
	48	return TRUE;
	49
	50	/* The string might have extra characters for supported subsets. So allow
	51	a match that ignores trailing characters in string. */
	52	if (strncasecmp (string, info->printable_name,
	53	strlen (info->printable_name)) == 0)
	54	return TRUE;
	55
	56	return FALSE;
	57	}
	58
aebcfb76	59	#define N(BITS, NUMBER, PRINT, DEFAULT, NEXT) \
e23eba97	60	{ \
aebcfb76 NC	61	BITS, /* Bits in a word. */ \
	62	BITS, /* Bits in an address. */ \
	63	8, /* Bits in a byte. */ \
e23eba97 NC	64	bfd_arch_riscv, \
	65	NUMBER, \
	66	"riscv", \
	67	PRINT, \
	68	3, \
	69	DEFAULT, \
	70	riscv_compatible, \
c35d018b	71	riscv_scan, \
e23eba97 NC	72	bfd_arch_default_fill, \
e23eba97 NC	73	NEXT, \
aebcfb76	74	0 /* Maximum offset of a reloc from the start of an insn. */\
e23eba97 NC	75	}
	76
	77	/* This enum must be kept in the same order as arch_info_struct. */
	78	enum
	79	{
	80	I_riscv64,
	81	I_riscv32
	82	};
	83
	84	#define NN(index) (&arch_info_struct[(index) + 1])
	85
	86	/* This array must be kept in the same order as the anonymous enum above,
	87	and each entry except the last should end with NN (my enum value). */
	88	static const bfd_arch_info_type arch_info_struct[] =
	89	{
aebcfb76 NC	90	N (64, bfd_mach_riscv64, "riscv:rv64", FALSE, NN (I_riscv64)),
aebcfb76 NC	91	N (32, bfd_mach_riscv32, "riscv:rv32", FALSE, NULL)
e23eba97 NC	92	};
	93
	94	/* The default architecture is riscv:rv64. */
	95
	96	const bfd_arch_info_type bfd_riscv_arch =
aebcfb76	97	N (64, 0, "riscv", TRUE, &arch_info_struct[0]);