1/* RISC-V ELF specific backend routines.
2   Copyright (C) 2011-2020 Free Software Foundation, Inc.
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 "elf/common.h"
24#include "elf/internal.h"
25#include "opcode/riscv.h"
26
27extern reloc_howto_type *
28riscv_reloc_name_lookup (bfd *, const char *);
29
30extern reloc_howto_type *
31riscv_reloc_type_lookup (bfd *, bfd_reloc_code_real_type);
32
33extern reloc_howto_type *
34riscv_elf_rtype_to_howto (bfd *, unsigned int r_type);
35
36#define RISCV_DONT_CARE_VERSION -1
37
38/* The information of architecture attribute.  */
39struct riscv_subset_t
40{
41  const char *name;
42  int major_version;
43  int minor_version;
44  struct riscv_subset_t *next;
45};
46
47typedef struct riscv_subset_t riscv_subset_t;
48
49typedef struct {
50  riscv_subset_t *head;
51  riscv_subset_t *tail;
52} riscv_subset_list_t;
53
54extern void
55riscv_release_subset_list (riscv_subset_list_t *);
56
57extern void
58riscv_add_subset (riscv_subset_list_t *,
59		  const char *,
60		  int, int);
61
62extern riscv_subset_t *
63riscv_lookup_subset (const riscv_subset_list_t *,
64		     const char *);
65
66extern riscv_subset_t *
67riscv_lookup_subset_version (const riscv_subset_list_t *,
68			     const char *,
69			     int, int);
70
71typedef struct {
72  riscv_subset_list_t *subset_list;
73  void (*error_handler) (const char *,
74			 ...) ATTRIBUTE_PRINTF_1;
75  unsigned *xlen;
76  void (*get_default_version) (const char *,
77                              unsigned int *,
78                              unsigned int *);
79} riscv_parse_subset_t;
80
81extern bfd_boolean
82riscv_parse_subset (riscv_parse_subset_t *,
83		    const char *);
84
85extern const char *
86riscv_supported_std_ext (void);
87
88extern void
89riscv_release_subset_list (riscv_subset_list_t *);
90
91extern char *
92riscv_arch_str (unsigned, const riscv_subset_list_t *);
93
94extern size_t
95riscv_estimate_digit (unsigned);
96
97/* ISA extension name class. E.g. "zbb" corresponds to RV_ISA_CLASS_Z,
98   "xargs" corresponds to RV_ISA_CLASS_X, etc.  Order is important
99   here.  */
100
101typedef enum riscv_isa_ext_class
102  {
103   RV_ISA_CLASS_S,
104   RV_ISA_CLASS_Z,
105   RV_ISA_CLASS_X,
106   RV_ISA_CLASS_UNKNOWN
107  } riscv_isa_ext_class_t;
108
109/* Classify the argument 'ext' into one of riscv_isa_ext_class_t.  */
110
111riscv_isa_ext_class_t
112riscv_get_prefix_class (const char *);
113
114extern int
115riscv_get_priv_spec_class (const char *, enum riscv_priv_spec_class *);
116
117extern int
118riscv_get_priv_spec_class_from_numbers (unsigned int,
119					unsigned int,
120					unsigned int,
121					enum riscv_priv_spec_class *);
122
123extern const char *
124riscv_get_priv_spec_name (enum riscv_priv_spec_class);
125