1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
/* Copyright (C) 2018-2021 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "gdbsupport/common-defs.h"
#include "riscv.h"
#include <stdlib.h>
#include <unordered_map>
#include "../features/riscv/32bit-cpu.c"
#include "../features/riscv/64bit-cpu.c"
#include "../features/riscv/32bit-fpu.c"
#include "../features/riscv/64bit-fpu.c"
#include "../features/riscv/rv32e-xregs.c"
#ifndef GDBSERVER
#define STATIC_IN_GDB static
#else
#define STATIC_IN_GDB
#endif
/* See arch/riscv.h. */
STATIC_IN_GDB target_desc_up
riscv_create_target_description (const struct riscv_gdbarch_features features)
{
/* Now we should create a new target description. */
target_desc_up tdesc = allocate_target_description ();
#ifndef IN_PROCESS_AGENT
std::string arch_name = "riscv";
if (features.xlen == 4)
{
if (features.embedded)
arch_name.append (":rv32e");
else
arch_name.append (":rv32i");
}
else if (features.xlen == 8)
arch_name.append (":rv64i");
else if (features.xlen == 16)
arch_name.append (":rv128i");
if (features.flen == 4)
arch_name.append ("f");
else if (features.flen == 8)
arch_name.append ("d");
else if (features.flen == 16)
arch_name.append ("q");
set_tdesc_architecture (tdesc.get (), arch_name.c_str ());
#endif
long regnum = 0;
/* For now we only support creating 32-bit or 64-bit x-registers. */
if (features.xlen == 4)
{
if (features.embedded)
regnum = create_feature_riscv_rv32e_xregs (tdesc.get (), regnum);
else
regnum = create_feature_riscv_32bit_cpu (tdesc.get (), regnum);
}
else if (features.xlen == 8)
regnum = create_feature_riscv_64bit_cpu (tdesc.get (), regnum);
/* For now we only support creating 32-bit or 64-bit f-registers. */
if (features.flen == 4)
regnum = create_feature_riscv_32bit_fpu (tdesc.get (), regnum);
else if (features.flen == 8)
regnum = create_feature_riscv_64bit_fpu (tdesc.get (), regnum);
return tdesc;
}
#ifndef GDBSERVER
/* Wrapper used by std::unordered_map to generate hash for feature set. */
struct riscv_gdbarch_features_hasher
{
std::size_t
operator() (const riscv_gdbarch_features &features) const noexcept
{
return features.hash ();
}
};
/* Cache of previously seen target descriptions, indexed by the feature set
that created them. */
static std::unordered_map<riscv_gdbarch_features,
const target_desc_up,
riscv_gdbarch_features_hasher> riscv_tdesc_cache;
/* See arch/riscv.h. */
const target_desc *
riscv_lookup_target_description (const struct riscv_gdbarch_features features)
{
/* Lookup in the cache. If we find it then return the pointer out of
the target_desc_up (which is a unique_ptr). This is safe as the
riscv_tdesc_cache will exist until GDB exits. */
const auto it = riscv_tdesc_cache.find (features);
if (it != riscv_tdesc_cache.end ())
return it->second.get ();
target_desc_up tdesc (riscv_create_target_description (features));
/* Add to the cache, and return a pointer borrowed from the
target_desc_up. This is safe as the cache (and the pointers
contained within it) are not deleted until GDB exits. */
target_desc *ptr = tdesc.get ();
riscv_tdesc_cache.emplace (features, std::move (tdesc));
return ptr;
}
#endif /* !GDBSERVER */
|
