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b811d2c2 | 1 | /* Copyright (C) 2018-2020 Free Software Foundation, Inc. |
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2 | |
3 | This file is part of GDB. | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 3 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
17 | ||
268a13a5 | 18 | #include "gdbsupport/common-defs.h" |
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19 | #include "riscv.h" |
20 | #include <stdlib.h> | |
63449436 | 21 | #include <unordered_map> |
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22 | |
23 | #include "../features/riscv/32bit-cpu.c" | |
24 | #include "../features/riscv/64bit-cpu.c" | |
25 | #include "../features/riscv/32bit-fpu.c" | |
26 | #include "../features/riscv/64bit-fpu.c" | |
27 | ||
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28 | #ifndef GDBSERVER |
29 | #define STATIC_IN_GDB static | |
30 | #else | |
31 | #define STATIC_IN_GDB | |
32 | #endif | |
63449436 | 33 | |
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34 | /* See arch/riscv.h. */ |
35 | ||
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36 | STATIC_IN_GDB target_desc * |
37 | riscv_create_target_description (const struct riscv_gdbarch_features features) | |
b5ffee31 | 38 | { |
63449436 | 39 | /* Now we should create a new target description. */ |
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40 | target_desc *tdesc = allocate_target_description (); |
41 | ||
42 | #ifndef IN_PROCESS_AGENT | |
43 | std::string arch_name = "riscv"; | |
44 | ||
45 | if (features.xlen == 4) | |
46 | arch_name.append (":rv32i"); | |
47 | else if (features.xlen == 8) | |
48 | arch_name.append (":rv64i"); | |
49 | else if (features.xlen == 16) | |
50 | arch_name.append (":rv128i"); | |
51 | ||
52 | if (features.flen == 4) | |
53 | arch_name.append ("f"); | |
54 | else if (features.flen == 8) | |
55 | arch_name.append ("d"); | |
56 | else if (features.flen == 16) | |
57 | arch_name.append ("q"); | |
58 | ||
59 | set_tdesc_architecture (tdesc, arch_name.c_str ()); | |
60 | #endif | |
61 | ||
62 | long regnum = 0; | |
63 | ||
64 | /* For now we only support creating 32-bit or 64-bit x-registers. */ | |
65 | if (features.xlen == 4) | |
66 | regnum = create_feature_riscv_32bit_cpu (tdesc, regnum); | |
67 | else if (features.xlen == 8) | |
68 | regnum = create_feature_riscv_64bit_cpu (tdesc, regnum); | |
69 | ||
70 | /* For now we only support creating 32-bit or 64-bit f-registers. */ | |
71 | if (features.flen == 4) | |
72 | regnum = create_feature_riscv_32bit_fpu (tdesc, regnum); | |
73 | else if (features.flen == 8) | |
74 | regnum = create_feature_riscv_64bit_fpu (tdesc, regnum); | |
75 | ||
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76 | return tdesc; |
77 | } | |
78 | ||
79 | #ifndef GDBSERVER | |
80 | ||
81 | /* Wrapper used by std::unordered_map to generate hash for feature set. */ | |
82 | struct riscv_gdbarch_features_hasher | |
83 | { | |
84 | std::size_t | |
85 | operator() (const riscv_gdbarch_features &features) const noexcept | |
86 | { | |
87 | return features.hash (); | |
88 | } | |
89 | }; | |
90 | ||
91 | /* Cache of previously seen target descriptions, indexed by the feature set | |
92 | that created them. */ | |
93 | static std::unordered_map<riscv_gdbarch_features, | |
94 | const target_desc *, | |
95 | riscv_gdbarch_features_hasher> riscv_tdesc_cache; | |
96 | ||
97 | /* See arch/riscv.h. */ | |
98 | ||
99 | const target_desc * | |
100 | riscv_lookup_target_description (const struct riscv_gdbarch_features features) | |
101 | { | |
102 | /* Lookup in the cache. */ | |
103 | const auto it = riscv_tdesc_cache.find (features); | |
104 | if (it != riscv_tdesc_cache.end ()) | |
105 | return it->second; | |
106 | ||
107 | target_desc *tdesc = riscv_create_target_description (features); | |
108 | ||
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109 | /* Add to the cache. */ |
110 | riscv_tdesc_cache.emplace (features, tdesc); | |
111 | ||
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112 | return tdesc; |
113 | } | |
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114 | |
115 | #endif /* !GDBSERVER */ |