1//===-- RegisterContextPOSIX_powerpc.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 <cerrno>
10#include <cstdint>
11#include <cstring>
12
13#include "lldb/Target/Process.h"
14#include "lldb/Target/Target.h"
15#include "lldb/Target/Thread.h"
16#include "lldb/Utility/DataBufferHeap.h"
17#include "lldb/Utility/DataExtractor.h"
18#include "lldb/Utility/Endian.h"
19#include "lldb/Utility/RegisterValue.h"
20#include "lldb/Utility/Scalar.h"
21#include "llvm/Support/Compiler.h"
22
23#include "RegisterContextPOSIX_powerpc.h"
24
25using namespace lldb_private;
26using namespace lldb;
27
28static const uint32_t g_gpr_regnums[] = {
29 gpr_r0_powerpc, gpr_r1_powerpc, gpr_r2_powerpc, gpr_r3_powerpc,
30 gpr_r4_powerpc, gpr_r5_powerpc, gpr_r6_powerpc, gpr_r7_powerpc,
31 gpr_r8_powerpc, gpr_r9_powerpc, gpr_r10_powerpc, gpr_r11_powerpc,
32 gpr_r12_powerpc, gpr_r13_powerpc, gpr_r14_powerpc, gpr_r15_powerpc,
33 gpr_r16_powerpc, gpr_r17_powerpc, gpr_r18_powerpc, gpr_r19_powerpc,
34 gpr_r20_powerpc, gpr_r21_powerpc, gpr_r22_powerpc, gpr_r23_powerpc,
35 gpr_r24_powerpc, gpr_r25_powerpc, gpr_r26_powerpc, gpr_r27_powerpc,
36 gpr_r28_powerpc, gpr_r29_powerpc, gpr_r30_powerpc, gpr_r31_powerpc,
37 gpr_lr_powerpc, gpr_cr_powerpc, gpr_xer_powerpc, gpr_ctr_powerpc,
38 gpr_pc_powerpc,
39};
40
41static const uint32_t g_fpr_regnums[] = {
42 fpr_f0_powerpc, fpr_f1_powerpc, fpr_f2_powerpc, fpr_f3_powerpc,
43 fpr_f4_powerpc, fpr_f5_powerpc, fpr_f6_powerpc, fpr_f7_powerpc,
44 fpr_f8_powerpc, fpr_f9_powerpc, fpr_f10_powerpc, fpr_f11_powerpc,
45 fpr_f12_powerpc, fpr_f13_powerpc, fpr_f14_powerpc, fpr_f15_powerpc,
46 fpr_f16_powerpc, fpr_f17_powerpc, fpr_f18_powerpc, fpr_f19_powerpc,
47 fpr_f20_powerpc, fpr_f21_powerpc, fpr_f22_powerpc, fpr_f23_powerpc,
48 fpr_f24_powerpc, fpr_f25_powerpc, fpr_f26_powerpc, fpr_f27_powerpc,
49 fpr_f28_powerpc, fpr_f29_powerpc, fpr_f30_powerpc, fpr_f31_powerpc,
50 fpr_fpscr_powerpc,
51};
52
53static const uint32_t g_vmx_regnums[] = {
54 vmx_v0_powerpc, vmx_v1_powerpc, vmx_v2_powerpc, vmx_v3_powerpc,
55 vmx_v4_powerpc, vmx_v5_powerpc, vmx_v6_powerpc, vmx_v7_powerpc,
56 vmx_v8_powerpc, vmx_v9_powerpc, vmx_v10_powerpc, vmx_v11_powerpc,
57 vmx_v12_powerpc, vmx_v13_powerpc, vmx_v14_powerpc, vmx_v15_powerpc,
58 vmx_v16_powerpc, vmx_v17_powerpc, vmx_v18_powerpc, vmx_v19_powerpc,
59 vmx_v20_powerpc, vmx_v21_powerpc, vmx_v22_powerpc, vmx_v23_powerpc,
60 vmx_v24_powerpc, vmx_v25_powerpc, vmx_v26_powerpc, vmx_v27_powerpc,
61 vmx_v28_powerpc, vmx_v29_powerpc, vmx_v30_powerpc, vmx_v31_powerpc,
62 vmx_vrsave_powerpc, vmx_vscr_powerpc,
63};
64
65// Number of register sets provided by this context.
66enum { k_num_register_sets = 3 };
67
68static const RegisterSet g_reg_sets_powerpc[k_num_register_sets] = {
69 {.name: "General Purpose Registers", .short_name: "gpr", .num_registers: k_num_gpr_registers_powerpc,
70 .registers: g_gpr_regnums},
71 {.name: "Floating Point Registers", .short_name: "fpr", .num_registers: k_num_fpr_registers_powerpc,
72 .registers: g_fpr_regnums},
73 {.name: "Altivec/VMX Registers", .short_name: "vmx", .num_registers: k_num_vmx_registers_powerpc,
74 .registers: g_vmx_regnums},
75};
76
77static_assert(k_first_gpr_powerpc == 0,
78 "GPRs must index starting at 0, or fix IsGPR()");
79bool RegisterContextPOSIX_powerpc::IsGPR(unsigned reg) {
80 return (reg <= k_last_gpr_powerpc); // GPR's come first.
81}
82
83bool RegisterContextPOSIX_powerpc::IsFPR(unsigned reg) {
84 return (reg >= k_first_fpr) && (reg <= k_last_fpr);
85}
86
87bool RegisterContextPOSIX_powerpc::IsVMX(unsigned reg) {
88 return (reg >= k_first_vmx) && (reg <= k_last_vmx);
89}
90
91RegisterContextPOSIX_powerpc::RegisterContextPOSIX_powerpc(
92 Thread &thread, uint32_t concrete_frame_idx,
93 RegisterInfoInterface *register_info)
94 : RegisterContext(thread, concrete_frame_idx) {
95 m_register_info_up.reset(p: register_info);
96}
97
98RegisterContextPOSIX_powerpc::~RegisterContextPOSIX_powerpc() = default;
99
100void RegisterContextPOSIX_powerpc::Invalidate() {}
101
102void RegisterContextPOSIX_powerpc::InvalidateAllRegisters() {}
103
104unsigned RegisterContextPOSIX_powerpc::GetRegisterOffset(unsigned reg) {
105 assert(reg < k_num_registers_powerpc && "Invalid register number.");
106 return GetRegisterInfo()[reg].byte_offset;
107}
108
109unsigned RegisterContextPOSIX_powerpc::GetRegisterSize(unsigned reg) {
110 assert(reg < k_num_registers_powerpc && "Invalid register number.");
111 return GetRegisterInfo()[reg].byte_size;
112}
113
114size_t RegisterContextPOSIX_powerpc::GetRegisterCount() {
115 size_t num_registers = k_num_registers_powerpc;
116 return num_registers;
117}
118
119size_t RegisterContextPOSIX_powerpc::GetGPRSize() {
120 return m_register_info_up->GetGPRSize();
121}
122
123const RegisterInfo *RegisterContextPOSIX_powerpc::GetRegisterInfo() {
124 // Commonly, this method is overridden and g_register_infos is copied and
125 // specialized. So, use GetRegisterInfo() rather than g_register_infos in
126 // this scope.
127 return m_register_info_up->GetRegisterInfo();
128}
129
130const RegisterInfo *
131RegisterContextPOSIX_powerpc::GetRegisterInfoAtIndex(size_t reg) {
132 if (reg < k_num_registers_powerpc)
133 return &GetRegisterInfo()[reg];
134 else
135 return nullptr;
136}
137
138size_t RegisterContextPOSIX_powerpc::GetRegisterSetCount() {
139 size_t sets = 0;
140 for (size_t set = 0; set < k_num_register_sets; ++set) {
141 if (IsRegisterSetAvailable(set_index: set))
142 ++sets;
143 }
144
145 return sets;
146}
147
148const RegisterSet *RegisterContextPOSIX_powerpc::GetRegisterSet(size_t set) {
149 if (IsRegisterSetAvailable(set_index: set))
150 return &g_reg_sets_powerpc[set];
151 else
152 return nullptr;
153}
154
155const char *RegisterContextPOSIX_powerpc::GetRegisterName(unsigned reg) {
156 assert(reg < k_num_registers_powerpc && "Invalid register offset.");
157 return GetRegisterInfo()[reg].name;
158}
159
160bool RegisterContextPOSIX_powerpc::IsRegisterSetAvailable(size_t set_index) {
161 size_t num_sets = k_num_register_sets;
162
163 return (set_index < num_sets);
164}
165

source code of lldb/source/Plugins/Process/Utility/RegisterContextPOSIX_powerpc.cpp