]> git.ipfire.org Git - thirdparty/binutils-gdb.git/blame - gdb/arch/arc.c
arc: Rename "arc_gdbarch_features" struct
[thirdparty/binutils-gdb.git] / gdb / arch / arc.c
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1/* Copyright (C) 2017-2020 Free Software Foundation, Inc.
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
18
19#include "gdbsupport/common-defs.h"
817a7585 20#include "arc.h"
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21#include <stdlib.h>
22#include <unordered_map>
23#include <string>
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24
25/* Target description features. */
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26#include "features/arc/v1-core.c"
27#include "features/arc/v1-aux.c"
28#include "features/arc/v2-core.c"
29#include "features/arc/v2-aux.c"
817a7585 30
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31#ifndef GDBSERVER
32#define STATIC_IN_GDB static
33#else
34#define STATIC_IN_GDB
35#endif
817a7585 36
995d3a19 37STATIC_IN_GDB target_desc *
e26d3e9b 38arc_create_target_description (const struct arc_arch_features &features)
817a7585 39{
995d3a19 40 /* Create a new target description. */
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41 target_desc *tdesc = allocate_target_description ();
42
817a7585 43#ifndef IN_PROCESS_AGENT
995d3a19 44 std::string arch_name;
817a7585 45
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46 /* Architecture names here must match the ones in
47 ARCH_INFO_STRUCT in bfd/cpu-arc.c. */
48 if (features.isa == ARC_ISA_ARCV1 && features.reg_size == 4)
49 arch_name = "arc:ARC700";
50 else if (features.isa == ARC_ISA_ARCV2 && features.reg_size == 4)
51 arch_name = "arc:ARCv2";
52 else
817a7585 53 {
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54 std::string msg = string_printf
55 ("Cannot determine architecture: ISA=%d; bitness=%d",
56 features.isa, 8 * features.reg_size);
57 gdb_assert_not_reached (msg.c_str ());
817a7585 58 }
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59
60 set_tdesc_architecture (tdesc, arch_name.c_str ());
61#endif
62
63 long regnum = 0;
64
65 switch (features.isa)
817a7585 66 {
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67 case ARC_ISA_ARCV1:
68 regnum = create_feature_arc_v1_core (tdesc, regnum);
69 regnum = create_feature_arc_v1_aux (tdesc, regnum);
70 break;
71 case ARC_ISA_ARCV2:
72 regnum = create_feature_arc_v2_core (tdesc, regnum);
73 regnum = create_feature_arc_v2_aux (tdesc, regnum);
74 break;
75 default:
76 std::string msg = string_printf
77 ("Cannot choose target description XML: %d", features.isa);
78 gdb_assert_not_reached (msg.c_str ());
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79 }
80
81 return tdesc;
82}
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83
84#ifndef GDBSERVER
85
86/* Wrapper used by std::unordered_map to generate hash for features set. */
e26d3e9b 87struct arc_arch_features_hasher
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88{
89 std::size_t
e26d3e9b 90 operator() (const arc_arch_features &features) const noexcept
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91 {
92 return features.hash ();
93 }
94};
95
96/* Cache of previously created target descriptions, indexed by the hash
97 of the features set used to create them. */
e26d3e9b 98static std::unordered_map<arc_arch_features,
995d3a19 99 const target_desc_up,
e26d3e9b 100 arc_arch_features_hasher> arc_tdesc_cache;
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101
102/* See arch/arc.h. */
103
104const target_desc *
e26d3e9b 105arc_lookup_target_description (const struct arc_arch_features &features)
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106{
107 /* Lookup in the cache first. If found, return the pointer from the
108 "target_desc_up" type which is a "unique_ptr". This should be fine
109 as the "arc_tdesc_cache" will persist until GDB terminates. */
110 const auto it = arc_tdesc_cache.find (features);
111 if (it != arc_tdesc_cache.end ())
112 return it->second.get ();
113
114 target_desc *tdesc = arc_create_target_description (features);
115
116 /* Add the newly created target description to the repertoire. */
117 arc_tdesc_cache.emplace (features, tdesc);
118
119 return tdesc;
120}
121
122#endif /* !GDBSERVER */