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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" | |
ba9b3ef5 AM |
26 | #include "elfxx-riscv.h" |
27 | ||
28 | /* Record the priv spec version string and the corresponding class. */ | |
29 | ||
30 | struct priv_spec_t | |
31 | { | |
32 | const char *name; | |
33 | enum riscv_priv_spec_class class; | |
34 | }; | |
35 | ||
36 | /* List for all supported privilege versions. */ | |
37 | ||
38 | static const struct priv_spec_t priv_specs[] = | |
39 | { | |
40 | {"1.9.1", PRIV_SPEC_CLASS_1P9P1}, | |
41 | {"1.10", PRIV_SPEC_CLASS_1P10}, | |
42 | {"1.11", PRIV_SPEC_CLASS_1P11}, | |
43 | ||
44 | /* Terminate the list. */ | |
45 | {NULL, 0} | |
46 | }; | |
47 | ||
48 | /* Get the corresponding CSR version class by giving a privilege | |
49 | version string. */ | |
50 | ||
51 | int | |
52 | riscv_get_priv_spec_class (const char *s, | |
53 | enum riscv_priv_spec_class *class) | |
54 | { | |
55 | const struct priv_spec_t *version; | |
56 | ||
57 | if (s == NULL) | |
58 | return 0; | |
59 | ||
60 | for (version = &priv_specs[0]; version->name != NULL; ++version) | |
61 | if (strcmp (version->name, s) == 0) | |
62 | { | |
63 | *class = version->class; | |
64 | return 1; | |
65 | } | |
66 | ||
67 | /* Can not find the supported privilege version. */ | |
68 | return 0; | |
69 | } | |
70 | ||
71 | /* Get the corresponding CSR version class by giving privilege | |
72 | version numbers. It is usually used to convert the priv | |
73 | attribute numbers into the corresponding class. */ | |
74 | ||
75 | int | |
76 | riscv_get_priv_spec_class_from_numbers (unsigned int major, | |
77 | unsigned int minor, | |
78 | unsigned int revision, | |
79 | enum riscv_priv_spec_class *class) | |
80 | { | |
81 | char buf[36]; | |
82 | ||
83 | if (major == 0 && minor == 0 && revision == 0) | |
84 | { | |
85 | *class = PRIV_SPEC_CLASS_NONE; | |
86 | return 1; | |
87 | } | |
88 | ||
89 | if (revision != 0) | |
90 | snprintf (buf, sizeof (buf), "%u.%u.%u", major, minor, revision); | |
91 | else | |
92 | snprintf (buf, sizeof (buf), "%u.%u", major, minor); | |
93 | ||
94 | return riscv_get_priv_spec_class (buf, class); | |
95 | } | |
96 | ||
97 | /* Get the corresponding privilege version string by giving a CSR | |
98 | version class. */ | |
99 | ||
100 | const char * | |
101 | riscv_get_priv_spec_name (enum riscv_priv_spec_class class) | |
102 | { | |
103 | /* The first enum is PRIV_SPEC_CLASS_NONE. */ | |
104 | return priv_specs[class - 1].name; | |
105 | } | |
e23eba97 NC |
106 | |
107 | /* This routine is provided two arch_infos and returns an arch_info | |
108 | that is compatible with both, or NULL if none exists. */ | |
109 | ||
110 | static const bfd_arch_info_type * | |
111 | riscv_compatible (const bfd_arch_info_type *a, const bfd_arch_info_type *b) | |
112 | { | |
113 | if (a->arch != b->arch) | |
114 | return NULL; | |
115 | ||
116 | /* Machine compatibility is checked in | |
117 | _bfd_riscv_elf_merge_private_bfd_data. */ | |
118 | ||
119 | return a; | |
120 | } | |
121 | ||
c35d018b JW |
122 | /* Return TRUE if STRING matches the architecture described by INFO. */ |
123 | ||
124 | static bfd_boolean | |
125 | riscv_scan (const struct bfd_arch_info *info, const char *string) | |
126 | { | |
127 | if (bfd_default_scan (info, string)) | |
128 | return TRUE; | |
129 | ||
069057bf AB |
130 | /* The incoming STRING might take the form of riscv:rvXXzzz, where XX is |
131 | 32 or 64, and zzz are one or more extension characters. As we | |
132 | currently only have 3 architectures defined, 'riscv', 'riscv:rv32', | |
133 | and 'riscv:rv64', we would like to ignore the zzz for the purpose of | |
134 | matching here. | |
135 | ||
136 | However, we don't want the default 'riscv' to match over a more | |
137 | specific 'riscv:rv32' or 'riscv:rv64', so in the case of the default | |
138 | architecture (with the shorter 'riscv' name) we don't allow any | |
139 | special matching, but for the 'riscv:rvXX' cases, we allow a match | |
140 | with any additional trailing characters being ignored. */ | |
141 | if (!info->the_default | |
142 | && strncasecmp (string, info->printable_name, | |
143 | strlen (info->printable_name)) == 0) | |
c35d018b JW |
144 | return TRUE; |
145 | ||
146 | return FALSE; | |
147 | } | |
148 | ||
aebcfb76 | 149 | #define N(BITS, NUMBER, PRINT, DEFAULT, NEXT) \ |
e23eba97 | 150 | { \ |
aebcfb76 NC |
151 | BITS, /* Bits in a word. */ \ |
152 | BITS, /* Bits in an address. */ \ | |
153 | 8, /* Bits in a byte. */ \ | |
e23eba97 NC |
154 | bfd_arch_riscv, \ |
155 | NUMBER, \ | |
156 | "riscv", \ | |
157 | PRINT, \ | |
158 | 3, \ | |
159 | DEFAULT, \ | |
160 | riscv_compatible, \ | |
c35d018b | 161 | riscv_scan, \ |
e23eba97 NC |
162 | bfd_arch_default_fill, \ |
163 | NEXT, \ | |
aebcfb76 | 164 | 0 /* Maximum offset of a reloc from the start of an insn. */\ |
e23eba97 NC |
165 | } |
166 | ||
167 | /* This enum must be kept in the same order as arch_info_struct. */ | |
168 | enum | |
169 | { | |
170 | I_riscv64, | |
171 | I_riscv32 | |
172 | }; | |
173 | ||
174 | #define NN(index) (&arch_info_struct[(index) + 1]) | |
175 | ||
176 | /* This array must be kept in the same order as the anonymous enum above, | |
177 | and each entry except the last should end with NN (my enum value). */ | |
178 | static const bfd_arch_info_type arch_info_struct[] = | |
179 | { | |
aebcfb76 NC |
180 | N (64, bfd_mach_riscv64, "riscv:rv64", FALSE, NN (I_riscv64)), |
181 | N (32, bfd_mach_riscv32, "riscv:rv32", FALSE, NULL) | |
e23eba97 NC |
182 | }; |
183 | ||
184 | /* The default architecture is riscv:rv64. */ | |
185 | ||
186 | const bfd_arch_info_type bfd_riscv_arch = | |
aebcfb76 | 187 | N (64, 0, "riscv", TRUE, &arch_info_struct[0]); |