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 | |
22 | 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 | |
51 | size_t RegisterContextCorePOSIX_ppc64le::GetFPRSize() const { |
52 | return k_num_fpr_registers_ppc64le * sizeof(uint64_t); |
53 | } |
54 | |
55 | size_t RegisterContextCorePOSIX_ppc64le::GetVMXSize() const { |
56 | return (k_num_vmx_registers_ppc64le - 1) * sizeof(uint64_t) * 2 + |
57 | sizeof(uint32_t); |
58 | } |
59 | |
60 | size_t RegisterContextCorePOSIX_ppc64le::GetVSXSize() const { |
61 | return k_num_vsx_registers_ppc64le * sizeof(uint64_t) * 2; |
62 | } |
63 | |
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: 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 | |
130 | bool RegisterContextCorePOSIX_ppc64le::WriteRegister( |
131 | const RegisterInfo *reg_info, const RegisterValue &value) { |
132 | return false; |
133 | } |
134 | |