1 //===-- RegisterInfoPOSIX_riscv32.cpp -------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===---------------------------------------------------------------------===//
8
9 #include "RegisterInfoPOSIX_riscv32.h"
10 #include "lldb/Utility/Flags.h"
11 #include "lldb/lldb-defines.h"
12 #include "llvm/Support/Compiler.h"
13
14 #include <cassert>
15 #include <stddef.h>
16
17 #define GPR_OFFSET(idx) ((idx) * 4 + 0)
18 #define FPR_OFFSET(idx) ((idx) * 4 + sizeof(RegisterInfoPOSIX_riscv32::GPR))
19
20 #define REG_CONTEXT_SIZE \
21 (sizeof(RegisterInfoPOSIX_riscv32::GPR) + \
22 sizeof(RegisterInfoPOSIX_riscv32::FPR))
23
24 #define DECLARE_REGISTER_INFOS_RISCV32_STRUCT
25 #include "RegisterInfos_riscv32.h"
26 #undef DECLARE_REGISTER_INFOS_RISCV32_STRUCT
27
GetRegisterInfoPtr(const lldb_private::ArchSpec & target_arch)28 const lldb_private::RegisterInfo *RegisterInfoPOSIX_riscv32::GetRegisterInfoPtr(
29 const lldb_private::ArchSpec &target_arch) {
30 switch (target_arch.GetMachine()) {
31 case llvm::Triple::riscv32:
32 return g_register_infos_riscv32_le;
33 default:
34 assert(false && "Unhandled target architecture.");
35 return nullptr;
36 }
37 }
38
GetRegisterInfoCount(const lldb_private::ArchSpec & target_arch)39 uint32_t RegisterInfoPOSIX_riscv32::GetRegisterInfoCount(
40 const lldb_private::ArchSpec &target_arch) {
41 switch (target_arch.GetMachine()) {
42 case llvm::Triple::riscv32:
43 return static_cast<uint32_t>(sizeof(g_register_infos_riscv32_le) /
44 sizeof(g_register_infos_riscv32_le[0]));
45 default:
46 assert(false && "Unhandled target architecture.");
47 return 0;
48 }
49 }
50
51 // Number of register sets provided by this context.
52 enum {
53 k_num_gpr_registers = gpr_last_riscv - gpr_first_riscv + 1,
54 k_num_fpr_registers = fpr_last_riscv - fpr_first_riscv + 1,
55 k_num_register_sets = 2
56 };
57
58 // RISC-V32 general purpose registers.
59 static const uint32_t g_gpr_regnums_riscv32[] = {
60 gpr_pc_riscv, gpr_ra_riscv, gpr_sp_riscv, gpr_x3_riscv,
61 gpr_x4_riscv, gpr_x5_riscv, gpr_x6_riscv, gpr_x7_riscv,
62 gpr_fp_riscv, gpr_x9_riscv, gpr_x10_riscv, gpr_x11_riscv,
63 gpr_x12_riscv, gpr_x13_riscv, gpr_x14_riscv, gpr_x15_riscv,
64 gpr_x16_riscv, gpr_x17_riscv, gpr_x18_riscv, gpr_x19_riscv,
65 gpr_x20_riscv, gpr_x21_riscv, gpr_x22_riscv, gpr_x23_riscv,
66 gpr_x24_riscv, gpr_x25_riscv, gpr_x26_riscv, gpr_x27_riscv,
67 gpr_x28_riscv, gpr_x29_riscv, gpr_x30_riscv, gpr_x31_riscv,
68 gpr_x0_riscv, LLDB_INVALID_REGNUM};
69
70 static_assert(((sizeof g_gpr_regnums_riscv32 /
71 sizeof g_gpr_regnums_riscv32[0]) -
72 1) == k_num_gpr_registers,
73 "g_gpr_regnums_riscv32 has wrong number of register infos");
74
75 // RISC-V32 floating point registers.
76 static const uint32_t g_fpr_regnums_riscv32[] = {
77 fpr_f0_riscv, fpr_f1_riscv, fpr_f2_riscv, fpr_f3_riscv,
78 fpr_f4_riscv, fpr_f5_riscv, fpr_f6_riscv, fpr_f7_riscv,
79 fpr_f8_riscv, fpr_f9_riscv, fpr_f10_riscv, fpr_f11_riscv,
80 fpr_f12_riscv, fpr_f13_riscv, fpr_f14_riscv, fpr_f15_riscv,
81 fpr_f16_riscv, fpr_f17_riscv, fpr_f18_riscv, fpr_f19_riscv,
82 fpr_f20_riscv, fpr_f21_riscv, fpr_f22_riscv, fpr_f23_riscv,
83 fpr_f24_riscv, fpr_f25_riscv, fpr_f26_riscv, fpr_f27_riscv,
84 fpr_f28_riscv, fpr_f29_riscv, fpr_f30_riscv, fpr_f31_riscv,
85 fpr_fcsr_riscv, LLDB_INVALID_REGNUM};
86
87 static_assert(((sizeof g_fpr_regnums_riscv32 /
88 sizeof g_fpr_regnums_riscv32[0]) -
89 1) == k_num_fpr_registers,
90 "g_fpr_regnums_riscv32 has wrong number of register infos");
91
92 // Register sets for RISC-V32.
93 static const lldb_private::RegisterSet g_reg_sets_riscv32[k_num_register_sets] =
94 {{"General Purpose Registers", "gpr", k_num_gpr_registers,
95 g_gpr_regnums_riscv32},
96 {"Floating Point Registers", "fpr", k_num_fpr_registers,
97 g_fpr_regnums_riscv32}};
98
RegisterInfoPOSIX_riscv32(const lldb_private::ArchSpec & target_arch,lldb_private::Flags opt_regsets)99 RegisterInfoPOSIX_riscv32::RegisterInfoPOSIX_riscv32(
100 const lldb_private::ArchSpec &target_arch, lldb_private::Flags opt_regsets)
101 : lldb_private::RegisterInfoAndSetInterface(target_arch),
102 m_register_info_p(GetRegisterInfoPtr(target_arch)),
103 m_register_info_count(GetRegisterInfoCount(target_arch)),
104 m_opt_regsets(opt_regsets) {}
105
GetRegisterCount() const106 uint32_t RegisterInfoPOSIX_riscv32::GetRegisterCount() const {
107 return m_register_info_count;
108 }
109
GetGPRSize() const110 size_t RegisterInfoPOSIX_riscv32::GetGPRSize() const {
111 return sizeof(struct RegisterInfoPOSIX_riscv32::GPR);
112 }
113
GetFPRSize() const114 size_t RegisterInfoPOSIX_riscv32::GetFPRSize() const {
115 return sizeof(struct RegisterInfoPOSIX_riscv32::FPR);
116 }
117
118 const lldb_private::RegisterInfo *
GetRegisterInfo() const119 RegisterInfoPOSIX_riscv32::GetRegisterInfo() const {
120 return m_register_info_p;
121 }
122
GetRegisterSetCount() const123 size_t RegisterInfoPOSIX_riscv32::GetRegisterSetCount() const {
124 return k_num_register_sets;
125 }
126
GetRegisterSetFromRegisterIndex(uint32_t reg_index) const127 size_t RegisterInfoPOSIX_riscv32::GetRegisterSetFromRegisterIndex(
128 uint32_t reg_index) const {
129 // coverity[unsigned_compare]
130 if (reg_index >= gpr_first_riscv && reg_index <= gpr_last_riscv)
131 return eRegsetMaskDefault;
132 if (reg_index >= fpr_first_riscv && reg_index <= fpr_last_riscv)
133 return eRegsetMaskFP;
134 return LLDB_INVALID_REGNUM;
135 }
136
137 const lldb_private::RegisterSet *
GetRegisterSet(size_t set_index) const138 RegisterInfoPOSIX_riscv32::GetRegisterSet(size_t set_index) const {
139 if (set_index < GetRegisterSetCount())
140 return &g_reg_sets_riscv32[set_index];
141 return nullptr;
142 }
143