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
20using namespace lldb_private;
21
22RegisterContextCorePOSIX_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>(args: gpregset.GetDataStart(),
27 args: gpregset.GetByteSize());
28 m_gpr.SetData(data_sp: m_gpr_buffer);
29 m_gpr.SetByteOrder(gpregset.GetByteOrder());
30
31 ArchSpec arch = register_info->GetTargetArchitecture();
32 DataExtractor fpregset = getRegset(Notes: notes, Triple: arch.GetTriple(), RegsetDescs: FPR_Desc);
33 m_fpr_buffer = std::make_shared<DataBufferHeap>(args: fpregset.GetDataStart(),
34 args: fpregset.GetByteSize());
35 m_fpr.SetData(data_sp: m_fpr_buffer);
36 m_fpr.SetByteOrder(fpregset.GetByteOrder());
37
38 DataExtractor vmxregset = getRegset(Notes: notes, Triple: arch.GetTriple(), RegsetDescs: PPC_VMX_Desc);
39 m_vmx_buffer = std::make_shared<DataBufferHeap>(args: vmxregset.GetDataStart(),
40 args: vmxregset.GetByteSize());
41 m_vmx.SetData(data_sp: m_vmx_buffer);
42 m_vmx.SetByteOrder(vmxregset.GetByteOrder());
43
44 DataExtractor vsxregset = getRegset(Notes: notes, Triple: arch.GetTriple(), RegsetDescs: PPC_VSX_Desc);
45 m_vsx_buffer = std::make_shared<DataBufferHeap>(args: vsxregset.GetDataStart(),
46 args: vsxregset.GetByteSize());
47 m_vsx.SetData(data_sp: m_vsx_buffer);
48 m_vsx.SetByteOrder(vsxregset.GetByteOrder());
49}
50
51size_t RegisterContextCorePOSIX_ppc64le::GetFPRSize() const {
52 return k_num_fpr_registers_ppc64le * sizeof(uint64_t);
53}
54
55size_t RegisterContextCorePOSIX_ppc64le::GetVMXSize() const {
56 return (k_num_vmx_registers_ppc64le - 1) * sizeof(uint64_t) * 2 +
57 sizeof(uint32_t);
58}
59
60size_t RegisterContextCorePOSIX_ppc64le::GetVSXSize() const {
61 return k_num_vsx_registers_ppc64le * sizeof(uint64_t) * 2;
62}
63
64bool RegisterContextCorePOSIX_ppc64le::ReadRegister(
65 const RegisterInfo *reg_info, RegisterValue &value) {
66 lldb::offset_t offset = reg_info->byte_offset;
67
68 if (IsFPR(reg: reg_info->kinds[lldb::eRegisterKindLLDB])) {
69 uint64_t v;
70 offset -= GetGPRSize();
71 offset = m_fpr.CopyData(offset, length: reg_info->byte_size, dst: &v);
72
73 if (offset == reg_info->byte_size) {
74 value.SetBytes(bytes: &v, length: reg_info->byte_size, byte_order: m_fpr.GetByteOrder());
75 return true;
76 }
77 } else if (IsVMX(reg: reg_info->kinds[lldb::eRegisterKindLLDB])) {
78 uint32_t v[4];
79 offset -= GetGPRSize() + GetFPRSize();
80 offset = m_vmx.CopyData(offset, length: reg_info->byte_size, dst: &v);
81
82 if (offset == reg_info->byte_size) {
83 value.SetBytes(bytes: v, length: reg_info->byte_size, byte_order: m_vmx.GetByteOrder());
84 return true;
85 }
86 } else if (IsVSX(reg: 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: offset / 2, length: reg_info->byte_size / 2, dst: &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: offset / 2, length: reg_info->byte_size / 2, dst);
100
101 if (tmp_offset != reg_info->byte_size / 2) {
102 return false;
103 }
104
105 value.SetBytes(bytes: &v, length: reg_info->byte_size, byte_order: m_vsx.GetByteOrder());
106 return true;
107 } else {
108 offset =
109 m_vmx.CopyData(offset: offset - GetVSXSize() / 2, length: reg_info->byte_size, dst: &v);
110 if (offset == reg_info->byte_size) {
111 value.SetBytes(bytes: v, length: reg_info->byte_size, byte_order: m_vmx.GetByteOrder());
112 return true;
113 }
114 }
115 } else {
116 uint64_t v = m_gpr.GetMaxU64(offset_ptr: &offset, byte_size: 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
130bool RegisterContextCorePOSIX_ppc64le::WriteRegister(
131 const RegisterInfo *reg_info, const RegisterValue &value) {
132 return false;
133}
134

source code of lldb/source/Plugins/Process/elf-core/RegisterContextPOSIXCore_ppc64le.cpp