1 //===-- RegisterContextPOSIX_powerpc.cpp -------------------------*- C++
2 //-*-===//
3 //
4 // The LLVM Compiler Infrastructure
5 //
6 // This file is distributed under the University of Illinois Open Source
7 // License. See LICENSE.TXT for details.
8 //
9 //===----------------------------------------------------------------------===//
10
11 #include <cstring>
12 #include <errno.h>
13 #include <stdint.h>
14
15 #include "lldb/Target/Process.h"
16 #include "lldb/Target/Target.h"
17 #include "lldb/Target/Thread.h"
18 #include "lldb/Utility/DataBufferHeap.h"
19 #include "lldb/Utility/DataExtractor.h"
20 #include "lldb/Utility/Endian.h"
21 #include "lldb/Utility/RegisterValue.h"
22 #include "lldb/Utility/Scalar.h"
23 #include "llvm/Support/Compiler.h"
24
25 #include "RegisterContextPOSIX_powerpc.h"
26
27 using namespace lldb_private;
28 using namespace lldb;
29
30 static const uint32_t g_gpr_regnums[] = {
31 gpr_r0_powerpc, gpr_r1_powerpc, gpr_r2_powerpc, gpr_r3_powerpc,
32 gpr_r4_powerpc, gpr_r5_powerpc, gpr_r6_powerpc, gpr_r7_powerpc,
33 gpr_r8_powerpc, gpr_r9_powerpc, gpr_r10_powerpc, gpr_r11_powerpc,
34 gpr_r12_powerpc, gpr_r13_powerpc, gpr_r14_powerpc, gpr_r15_powerpc,
35 gpr_r16_powerpc, gpr_r17_powerpc, gpr_r18_powerpc, gpr_r19_powerpc,
36 gpr_r20_powerpc, gpr_r21_powerpc, gpr_r22_powerpc, gpr_r23_powerpc,
37 gpr_r24_powerpc, gpr_r25_powerpc, gpr_r26_powerpc, gpr_r27_powerpc,
38 gpr_r28_powerpc, gpr_r29_powerpc, gpr_r30_powerpc, gpr_r31_powerpc,
39 gpr_lr_powerpc, gpr_cr_powerpc, gpr_xer_powerpc, gpr_ctr_powerpc,
40 gpr_pc_powerpc,
41 };
42
43 static const uint32_t g_fpr_regnums[] = {
44 fpr_f0_powerpc, fpr_f1_powerpc, fpr_f2_powerpc, fpr_f3_powerpc,
45 fpr_f4_powerpc, fpr_f5_powerpc, fpr_f6_powerpc, fpr_f7_powerpc,
46 fpr_f8_powerpc, fpr_f9_powerpc, fpr_f10_powerpc, fpr_f11_powerpc,
47 fpr_f12_powerpc, fpr_f13_powerpc, fpr_f14_powerpc, fpr_f15_powerpc,
48 fpr_f16_powerpc, fpr_f17_powerpc, fpr_f18_powerpc, fpr_f19_powerpc,
49 fpr_f20_powerpc, fpr_f21_powerpc, fpr_f22_powerpc, fpr_f23_powerpc,
50 fpr_f24_powerpc, fpr_f25_powerpc, fpr_f26_powerpc, fpr_f27_powerpc,
51 fpr_f28_powerpc, fpr_f29_powerpc, fpr_f30_powerpc, fpr_f31_powerpc,
52 fpr_fpscr_powerpc,
53 };
54
55 static const uint32_t g_vmx_regnums[] = {
56 vmx_v0_powerpc, vmx_v1_powerpc, vmx_v2_powerpc, vmx_v3_powerpc,
57 vmx_v4_powerpc, vmx_v5_powerpc, vmx_v6_powerpc, vmx_v7_powerpc,
58 vmx_v8_powerpc, vmx_v9_powerpc, vmx_v10_powerpc, vmx_v11_powerpc,
59 vmx_v12_powerpc, vmx_v13_powerpc, vmx_v14_powerpc, vmx_v15_powerpc,
60 vmx_v16_powerpc, vmx_v17_powerpc, vmx_v18_powerpc, vmx_v19_powerpc,
61 vmx_v20_powerpc, vmx_v21_powerpc, vmx_v22_powerpc, vmx_v23_powerpc,
62 vmx_v24_powerpc, vmx_v25_powerpc, vmx_v26_powerpc, vmx_v27_powerpc,
63 vmx_v28_powerpc, vmx_v29_powerpc, vmx_v30_powerpc, vmx_v31_powerpc,
64 vmx_vrsave_powerpc, vmx_vscr_powerpc,
65 };
66
67 // Number of register sets provided by this context.
68 enum { k_num_register_sets = 3 };
69
70 static const RegisterSet g_reg_sets_powerpc[k_num_register_sets] = {
71 {"General Purpose Registers", "gpr", k_num_gpr_registers_powerpc,
72 g_gpr_regnums},
73 {"Floating Point Registers", "fpr", k_num_fpr_registers_powerpc,
74 g_fpr_regnums},
75 {"Altivec/VMX Registers", "vmx", k_num_vmx_registers_powerpc,
76 g_vmx_regnums},
77 };
78
79 static_assert(k_first_gpr_powerpc == 0,
80 "GPRs must index starting at 0, or fix IsGPR()");
IsGPR(unsigned reg)81 bool RegisterContextPOSIX_powerpc::IsGPR(unsigned reg) {
82 return (reg <= k_last_gpr_powerpc); // GPR's come first.
83 }
84
IsFPR(unsigned reg)85 bool RegisterContextPOSIX_powerpc::IsFPR(unsigned reg) {
86 return (reg >= k_first_fpr) && (reg <= k_last_fpr);
87 }
88
IsVMX(unsigned reg)89 bool RegisterContextPOSIX_powerpc::IsVMX(unsigned reg) {
90 return (reg >= k_first_vmx) && (reg <= k_last_vmx);
91 }
92
RegisterContextPOSIX_powerpc(Thread & thread,uint32_t concrete_frame_idx,RegisterInfoInterface * register_info)93 RegisterContextPOSIX_powerpc::RegisterContextPOSIX_powerpc(
94 Thread &thread, uint32_t concrete_frame_idx,
95 RegisterInfoInterface *register_info)
96 : RegisterContext(thread, concrete_frame_idx) {
97 m_register_info_ap.reset(register_info);
98 }
99
~RegisterContextPOSIX_powerpc()100 RegisterContextPOSIX_powerpc::~RegisterContextPOSIX_powerpc() {}
101
Invalidate()102 void RegisterContextPOSIX_powerpc::Invalidate() {}
103
InvalidateAllRegisters()104 void RegisterContextPOSIX_powerpc::InvalidateAllRegisters() {}
105
GetRegisterOffset(unsigned reg)106 unsigned RegisterContextPOSIX_powerpc::GetRegisterOffset(unsigned reg) {
107 assert(reg < k_num_registers_powerpc && "Invalid register number.");
108 return GetRegisterInfo()[reg].byte_offset;
109 }
110
GetRegisterSize(unsigned reg)111 unsigned RegisterContextPOSIX_powerpc::GetRegisterSize(unsigned reg) {
112 assert(reg < k_num_registers_powerpc && "Invalid register number.");
113 return GetRegisterInfo()[reg].byte_size;
114 }
115
GetRegisterCount()116 size_t RegisterContextPOSIX_powerpc::GetRegisterCount() {
117 size_t num_registers = k_num_registers_powerpc;
118 return num_registers;
119 }
120
GetGPRSize()121 size_t RegisterContextPOSIX_powerpc::GetGPRSize() {
122 return m_register_info_ap->GetGPRSize();
123 }
124
GetRegisterInfo()125 const RegisterInfo *RegisterContextPOSIX_powerpc::GetRegisterInfo() {
126 // Commonly, this method is overridden and g_register_infos is copied and
127 // specialized. So, use GetRegisterInfo() rather than g_register_infos in
128 // this scope.
129 return m_register_info_ap->GetRegisterInfo();
130 }
131
132 const RegisterInfo *
GetRegisterInfoAtIndex(size_t reg)133 RegisterContextPOSIX_powerpc::GetRegisterInfoAtIndex(size_t reg) {
134 if (reg < k_num_registers_powerpc)
135 return &GetRegisterInfo()[reg];
136 else
137 return NULL;
138 }
139
GetRegisterSetCount()140 size_t RegisterContextPOSIX_powerpc::GetRegisterSetCount() {
141 size_t sets = 0;
142 for (size_t set = 0; set < k_num_register_sets; ++set) {
143 if (IsRegisterSetAvailable(set))
144 ++sets;
145 }
146
147 return sets;
148 }
149
GetRegisterSet(size_t set)150 const RegisterSet *RegisterContextPOSIX_powerpc::GetRegisterSet(size_t set) {
151 if (IsRegisterSetAvailable(set))
152 return &g_reg_sets_powerpc[set];
153 else
154 return NULL;
155 }
156
GetRegisterName(unsigned reg)157 const char *RegisterContextPOSIX_powerpc::GetRegisterName(unsigned reg) {
158 assert(reg < k_num_registers_powerpc && "Invalid register offset.");
159 return GetRegisterInfo()[reg].name;
160 }
161
GetByteOrder()162 lldb::ByteOrder RegisterContextPOSIX_powerpc::GetByteOrder() {
163 // Get the target process whose privileged thread was used for the register
164 // read.
165 lldb::ByteOrder byte_order = eByteOrderInvalid;
166 Process *process = CalculateProcess().get();
167
168 if (process)
169 byte_order = process->GetByteOrder();
170 return byte_order;
171 }
172
IsRegisterSetAvailable(size_t set_index)173 bool RegisterContextPOSIX_powerpc::IsRegisterSetAvailable(size_t set_index) {
174 size_t num_sets = k_num_register_sets;
175
176 return (set_index < num_sets);
177 }
178
179 // Used when parsing DWARF and EH frame information and any other object file
180 // sections that contain register numbers in them.
ConvertRegisterKindToRegisterNumber(lldb::RegisterKind kind,uint32_t num)181 uint32_t RegisterContextPOSIX_powerpc::ConvertRegisterKindToRegisterNumber(
182 lldb::RegisterKind kind, uint32_t num) {
183 const uint32_t num_regs = GetRegisterCount();
184
185 assert(kind < kNumRegisterKinds);
186 for (uint32_t reg_idx = 0; reg_idx < num_regs; ++reg_idx) {
187 const RegisterInfo *reg_info = GetRegisterInfoAtIndex(reg_idx);
188
189 if (reg_info->kinds[kind] == num)
190 return reg_idx;
191 }
192
193 return LLDB_INVALID_REGNUM;
194 }
195