Line data Source code
1 : /* Register names and numbers for RISC-V DWARF.
2 : This file is part of elfutils.
3 :
4 : This file is free software; you can redistribute it and/or modify
5 : it under the terms of either
6 :
7 : * the GNU Lesser General Public License as published by the Free
8 : Software Foundation; either version 3 of the License, or (at
9 : your option) any later version
10 :
11 : or
12 :
13 : * the GNU General Public License as published by the Free
14 : Software Foundation; either version 2 of the License, or (at
15 : your option) any later version
16 :
17 : or both in parallel, as here.
18 :
19 : elfutils is distributed in the hope that it will be useful, but
20 : WITHOUT ANY WARRANTY; without even the implied warranty of
21 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22 : General Public License for more details.
23 :
24 : You should have received copies of the GNU General Public License and
25 : the GNU Lesser General Public License along with this program. If
26 : not, see <http://www.gnu.org/licenses/>. */
27 :
28 : #ifdef HAVE_CONFIG_H
29 : # include <config.h>
30 : #endif
31 :
32 : #include <string.h>
33 : #include <dwarf.h>
34 :
35 : #define BACKEND riscv_
36 : #include "libebl_CPU.h"
37 :
38 : ssize_t
39 156 : riscv_register_info (Ebl *ebl, int regno, char *name, size_t namelen,
40 : const char **prefix, const char **setname,
41 : int *bits, int *type)
42 : {
43 156 : if (name == NULL)
44 : return 64;
45 :
46 154 : *prefix = "";
47 :
48 154 : if (regno < 32)
49 : {
50 122 : *setname = "integer";
51 122 : *type = DW_ATE_signed;
52 122 : *bits = ebl->class == ELFCLASS64 ? 64 : 32;
53 : }
54 : else
55 : {
56 32 : *setname = "FPU";
57 32 : *type = DW_ATE_float;
58 32 : *bits = 64;
59 : }
60 :
61 154 : switch (regno)
62 : {
63 : case 0:
64 2 : return stpcpy (name, "zero") + 1 - name;
65 :
66 11 : case 1:
67 11 : *type = DW_ATE_address;
68 22 : return stpcpy (name, "ra") + 1 - name;
69 :
70 11 : case 2:
71 11 : *type = DW_ATE_address;
72 22 : return stpcpy (name, "sp") + 1 - name;
73 :
74 3 : case 3:
75 3 : *type = DW_ATE_address;
76 6 : return stpcpy (name, "gp") + 1 - name;
77 :
78 3 : case 4:
79 3 : *type = DW_ATE_address;
80 6 : return stpcpy (name, "tp") + 1 - name;
81 :
82 9 : case 5 ... 7:
83 9 : name[0] = 't';
84 9 : name[1] = regno - 5 + '0';
85 9 : namelen = 2;
86 9 : break;
87 :
88 18 : case 8 ... 9:
89 18 : name[0] = 's';
90 18 : name[1] = regno - 8 + '0';
91 18 : namelen = 2;
92 18 : break;
93 :
94 24 : case 10 ... 17:
95 24 : name[0] = 'a';
96 24 : name[1] = regno - 10 + '0';
97 24 : namelen = 2;
98 24 : break;
99 :
100 24 : case 18 ... 25:
101 24 : name[0] = 's';
102 24 : name[1] = regno - 18 + '2';
103 24 : namelen = 2;
104 24 : break;
105 :
106 6 : case 26 ... 27:
107 6 : name[0] = 's';
108 6 : name[1] = '1';
109 6 : name[2] = regno - 26 + '0';
110 6 : namelen = 3;
111 6 : break;
112 :
113 12 : case 28 ... 31:
114 12 : name[0] = 't';
115 12 : name[1] = regno - 28 + '3';
116 12 : namelen = 2;
117 12 : break;
118 :
119 8 : case 32 ... 39:
120 8 : name[0] = 'f';
121 8 : name[1] = 't';
122 8 : name[2] = regno - 32 + '0';
123 8 : namelen = 3;
124 8 : break;
125 :
126 2 : case 40 ... 41:
127 2 : name[0] = 'f';
128 2 : name[1] = 's';
129 2 : name[2] = regno - 40 + '0';
130 2 : namelen = 3;
131 2 : break;
132 :
133 8 : case 42 ... 49:
134 8 : name[0] = 'f';
135 8 : name[1] = 'a';
136 8 : name[2] = regno - 42 + '0';
137 8 : namelen = 3;
138 8 : break;
139 :
140 8 : case 50 ... 57:
141 8 : name[0] = 'f';
142 8 : name[1] = 's';
143 8 : name[2] = regno - 50 + '2';
144 8 : namelen = 3;
145 8 : break;
146 :
147 2 : case 58 ... 59:
148 2 : name[0] = 'f';
149 2 : name[1] = 's';
150 2 : name[2] = '1';
151 2 : name[3] = regno - 58 + '0';
152 2 : namelen = 4;
153 2 : break;
154 :
155 2 : case 60 ... 61:
156 2 : name[0] = 'f';
157 2 : name[1] = 't';
158 2 : name[2] = regno - 60 + '8';
159 2 : namelen = 3;
160 2 : break;
161 :
162 2 : case 62 ... 63:
163 2 : name[0] = 'f';
164 2 : name[1] = 't';
165 2 : name[2] = '1';
166 2 : name[3] = regno - 62 + '0';
167 2 : namelen = 4;
168 2 : break;
169 :
170 0 : default:
171 0 : *setname = NULL;
172 0 : return 0;
173 : }
174 :
175 125 : name[namelen++] = '\0';
176 125 : return namelen;
177 : }
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