1 //===-- RegisterContextPOSIXCore_ppc64le.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 "RegisterContextPOSIXCore_ppc64le.h"
10
11 #include "lldb/Target/Thread.h"
12 #include "lldb/Utility/DataBufferHeap.h"
13 #include "lldb/Utility/RegisterValue.h"
14
15 #include "Plugins/Process/Utility/lldb-ppc64le-register-enums.h"
16 #include "Plugins/Process/elf-core/RegisterUtilities.h"
17
18 #include <memory>
19
20 using namespace lldb_private;
21
RegisterContextCorePOSIX_ppc64le(Thread & thread,RegisterInfoInterface * register_info,const DataExtractor & gpregset,llvm::ArrayRef<CoreNote> notes)22 RegisterContextCorePOSIX_ppc64le::RegisterContextCorePOSIX_ppc64le(
23 Thread &thread, RegisterInfoInterface *register_info,
24 const DataExtractor &gpregset, llvm::ArrayRef<CoreNote> notes)
25 : RegisterContextPOSIX_ppc64le(thread, 0, register_info) {
26 m_gpr_buffer = std::make_shared<DataBufferHeap>(gpregset.GetDataStart(),
27 gpregset.GetByteSize());
28 m_gpr.SetData(m_gpr_buffer);
29 m_gpr.SetByteOrder(gpregset.GetByteOrder());
30
31 ArchSpec arch = register_info->GetTargetArchitecture();
32 DataExtractor fpregset = getRegset(notes, arch.GetTriple(), FPR_Desc);
33 m_fpr_buffer = std::make_shared<DataBufferHeap>(fpregset.GetDataStart(),
34 fpregset.GetByteSize());
35 m_fpr.SetData(m_fpr_buffer);
36 m_fpr.SetByteOrder(fpregset.GetByteOrder());
37
38 DataExtractor vmxregset = getRegset(notes, arch.GetTriple(), PPC_VMX_Desc);
39 m_vmx_buffer = std::make_shared<DataBufferHeap>(vmxregset.GetDataStart(),
40 vmxregset.GetByteSize());
41 m_vmx.SetData(m_vmx_buffer);
42 m_vmx.SetByteOrder(vmxregset.GetByteOrder());
43
44 DataExtractor vsxregset = getRegset(notes, arch.GetTriple(), PPC_VSX_Desc);
45 m_vsx_buffer = std::make_shared<DataBufferHeap>(vsxregset.GetDataStart(),
46 vsxregset.GetByteSize());
47 m_vsx.SetData(m_vsx_buffer);
48 m_vsx.SetByteOrder(vsxregset.GetByteOrder());
49 }
50
GetFPRSize() const51 size_t RegisterContextCorePOSIX_ppc64le::GetFPRSize() const {
52 return k_num_fpr_registers_ppc64le * sizeof(uint64_t);
53 }
54
GetVMXSize() const55 size_t RegisterContextCorePOSIX_ppc64le::GetVMXSize() const {
56 return (k_num_vmx_registers_ppc64le - 1) * sizeof(uint64_t) * 2 +
57 sizeof(uint32_t);
58 }
59
GetVSXSize() const60 size_t RegisterContextCorePOSIX_ppc64le::GetVSXSize() const {
61 return k_num_vsx_registers_ppc64le * sizeof(uint64_t) * 2;
62 }
63
ReadRegister(const RegisterInfo * reg_info,RegisterValue & value)64 bool RegisterContextCorePOSIX_ppc64le::ReadRegister(
65 const RegisterInfo *reg_info, RegisterValue &value) {
66 lldb::offset_t offset = reg_info->byte_offset;
67
68 if (IsFPR(reg_info->kinds[lldb::eRegisterKindLLDB])) {
69 uint64_t v;
70 offset -= GetGPRSize();
71 offset = m_fpr.CopyData(offset, reg_info->byte_size, &v);
72
73 if (offset == reg_info->byte_size) {
74 value.SetBytes(&v, reg_info->byte_size, m_fpr.GetByteOrder());
75 return true;
76 }
77 } else if (IsVMX(reg_info->kinds[lldb::eRegisterKindLLDB])) {
78 uint32_t v[4];
79 offset -= GetGPRSize() + GetFPRSize();
80 offset = m_vmx.CopyData(offset, reg_info->byte_size, &v);
81
82 if (offset == reg_info->byte_size) {
83 value.SetBytes(v, reg_info->byte_size, m_vmx.GetByteOrder());
84 return true;
85 }
86 } else if (IsVSX(reg_info->kinds[lldb::eRegisterKindLLDB])) {
87 uint32_t v[4];
88 lldb::offset_t tmp_offset;
89 offset -= GetGPRSize() + GetFPRSize() + GetVMXSize();
90
91 if (offset < GetVSXSize() / 2) {
92 tmp_offset = m_vsx.CopyData(offset / 2, reg_info->byte_size / 2, &v);
93
94 if (tmp_offset != reg_info->byte_size / 2) {
95 return false;
96 }
97
98 uint8_t *dst = (uint8_t *)&v + sizeof(uint64_t);
99 tmp_offset = m_fpr.CopyData(offset / 2, reg_info->byte_size / 2, dst);
100
101 if (tmp_offset != reg_info->byte_size / 2) {
102 return false;
103 }
104
105 value.SetBytes(&v, reg_info->byte_size, m_vsx.GetByteOrder());
106 return true;
107 } else {
108 offset =
109 m_vmx.CopyData(offset - GetVSXSize() / 2, reg_info->byte_size, &v);
110 if (offset == reg_info->byte_size) {
111 value.SetBytes(v, reg_info->byte_size, m_vmx.GetByteOrder());
112 return true;
113 }
114 }
115 } else {
116 uint64_t v = m_gpr.GetMaxU64(&offset, reg_info->byte_size);
117
118 if (offset == reg_info->byte_offset + reg_info->byte_size) {
119 if (reg_info->byte_size < sizeof(v))
120 value = (uint32_t)v;
121 else
122 value = v;
123 return true;
124 }
125 }
126
127 return false;
128 }
129
WriteRegister(const RegisterInfo * reg_info,const RegisterValue & value)130 bool RegisterContextCorePOSIX_ppc64le::WriteRegister(
131 const RegisterInfo *reg_info, const RegisterValue &value) {
132 return false;
133 }
134