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213516ef | 1 | /* Copyright (C) 2018-2023 Free Software Foundation, Inc. |
b5ffee31 AB |
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" |
b5ffee31 AB |
19 | #include "riscv.h" |
20 | #include <stdlib.h> | |
63449436 | 21 | #include <unordered_map> |
b5ffee31 AB |
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" | |
25428040 | 27 | #include "../features/riscv/rv32e-xregs.c" |
b5ffee31 | 28 | |
d1c9b20f AB |
29 | #ifndef GDBSERVER |
30 | #define STATIC_IN_GDB static | |
31 | #else | |
32 | #define STATIC_IN_GDB | |
33 | #endif | |
63449436 | 34 | |
b5ffee31 AB |
35 | /* See arch/riscv.h. */ |
36 | ||
51a948fd | 37 | STATIC_IN_GDB target_desc_up |
d1c9b20f | 38 | riscv_create_target_description (const struct riscv_gdbarch_features features) |
b5ffee31 | 39 | { |
63449436 | 40 | /* Now we should create a new target description. */ |
51a948fd | 41 | target_desc_up tdesc = allocate_target_description (); |
b5ffee31 AB |
42 | |
43 | #ifndef IN_PROCESS_AGENT | |
44 | std::string arch_name = "riscv"; | |
45 | ||
46 | if (features.xlen == 4) | |
25428040 AB |
47 | { |
48 | if (features.embedded) | |
49 | arch_name.append (":rv32e"); | |
50 | else | |
51 | arch_name.append (":rv32i"); | |
52 | } | |
b5ffee31 AB |
53 | else if (features.xlen == 8) |
54 | arch_name.append (":rv64i"); | |
55 | else if (features.xlen == 16) | |
56 | arch_name.append (":rv128i"); | |
57 | ||
58 | if (features.flen == 4) | |
59 | arch_name.append ("f"); | |
60 | else if (features.flen == 8) | |
61 | arch_name.append ("d"); | |
62 | else if (features.flen == 16) | |
63 | arch_name.append ("q"); | |
64 | ||
51a948fd | 65 | set_tdesc_architecture (tdesc.get (), arch_name.c_str ()); |
b5ffee31 AB |
66 | #endif |
67 | ||
68 | long regnum = 0; | |
69 | ||
70 | /* For now we only support creating 32-bit or 64-bit x-registers. */ | |
71 | if (features.xlen == 4) | |
25428040 AB |
72 | { |
73 | if (features.embedded) | |
74 | regnum = create_feature_riscv_rv32e_xregs (tdesc.get (), regnum); | |
75 | else | |
76 | regnum = create_feature_riscv_32bit_cpu (tdesc.get (), regnum); | |
77 | } | |
b5ffee31 | 78 | else if (features.xlen == 8) |
51a948fd | 79 | regnum = create_feature_riscv_64bit_cpu (tdesc.get (), regnum); |
b5ffee31 AB |
80 | |
81 | /* For now we only support creating 32-bit or 64-bit f-registers. */ | |
82 | if (features.flen == 4) | |
51a948fd | 83 | regnum = create_feature_riscv_32bit_fpu (tdesc.get (), regnum); |
b5ffee31 | 84 | else if (features.flen == 8) |
51a948fd | 85 | regnum = create_feature_riscv_64bit_fpu (tdesc.get (), regnum); |
b5ffee31 | 86 | |
96f842cb AB |
87 | /* Currently GDB only supports vector features coming from remote |
88 | targets. We don't support creating vector features on native targets | |
89 | (yet). */ | |
90 | if (features.vlen != 0) | |
91 | error (_("unable to create vector feature")); | |
92 | ||
d1c9b20f AB |
93 | return tdesc; |
94 | } | |
95 | ||
96 | #ifndef GDBSERVER | |
97 | ||
98 | /* Wrapper used by std::unordered_map to generate hash for feature set. */ | |
99 | struct riscv_gdbarch_features_hasher | |
100 | { | |
101 | std::size_t | |
102 | operator() (const riscv_gdbarch_features &features) const noexcept | |
103 | { | |
104 | return features.hash (); | |
105 | } | |
106 | }; | |
107 | ||
108 | /* Cache of previously seen target descriptions, indexed by the feature set | |
109 | that created them. */ | |
110 | static std::unordered_map<riscv_gdbarch_features, | |
0e267416 | 111 | const target_desc_up, |
d1c9b20f AB |
112 | riscv_gdbarch_features_hasher> riscv_tdesc_cache; |
113 | ||
114 | /* See arch/riscv.h. */ | |
115 | ||
116 | const target_desc * | |
117 | riscv_lookup_target_description (const struct riscv_gdbarch_features features) | |
118 | { | |
0e267416 AB |
119 | /* Lookup in the cache. If we find it then return the pointer out of |
120 | the target_desc_up (which is a unique_ptr). This is safe as the | |
121 | riscv_tdesc_cache will exist until GDB exits. */ | |
d1c9b20f AB |
122 | const auto it = riscv_tdesc_cache.find (features); |
123 | if (it != riscv_tdesc_cache.end ()) | |
0e267416 | 124 | return it->second.get (); |
d1c9b20f | 125 | |
51a948fd | 126 | target_desc_up tdesc (riscv_create_target_description (features)); |
d1c9b20f | 127 | |
51a948fd AB |
128 | /* Add to the cache, and return a pointer borrowed from the |
129 | target_desc_up. This is safe as the cache (and the pointers | |
130 | contained within it) are not deleted until GDB exits. */ | |
131 | target_desc *ptr = tdesc.get (); | |
132 | riscv_tdesc_cache.emplace (features, std::move (tdesc)); | |
133 | return ptr; | |
b5ffee31 | 134 | } |
d1c9b20f AB |
135 | |
136 | #endif /* !GDBSERVER */ |