RegisterContextPOSIX_powerpc.cpp revision 278334 
1//===-- RegisterContextPOSIX_powerpc.cpp -------------------------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include <cstring>
11#include <errno.h>
12#include <stdint.h>
13
14#include "lldb/Core/DataBufferHeap.h"
15#include "lldb/Core/DataExtractor.h"
16#include "lldb/Core/RegisterValue.h"
17#include "lldb/Core/Scalar.h"
18#include "lldb/Target/Target.h"
19#include "lldb/Target/Thread.h"
20#include "lldb/Host/Endian.h"
21#include "llvm/Support/Compiler.h"
22
23#include "RegisterContextPOSIX_powerpc.h"
24#include "Plugins/Process/elf-core/ProcessElfCore.h"
25
26using namespace lldb_private;
27using namespace lldb;
28
29static const
30uint32_t g_gpr_regnums[] =
31{
32    gpr_r0_powerpc,
33    gpr_r1_powerpc,
34    gpr_r2_powerpc,
35    gpr_r3_powerpc,
36    gpr_r4_powerpc,
37    gpr_r5_powerpc,
38    gpr_r6_powerpc,
39    gpr_r7_powerpc,
40    gpr_r8_powerpc,
41    gpr_r9_powerpc,
42    gpr_r10_powerpc,
43    gpr_r11_powerpc,
44    gpr_r12_powerpc,
45    gpr_r13_powerpc,
46    gpr_r14_powerpc,
47    gpr_r15_powerpc,
48    gpr_r16_powerpc,
49    gpr_r17_powerpc,
50    gpr_r18_powerpc,
51    gpr_r19_powerpc,
52    gpr_r20_powerpc,
53    gpr_r21_powerpc,
54    gpr_r22_powerpc,
55    gpr_r23_powerpc,
56    gpr_r24_powerpc,
57    gpr_r25_powerpc,
58    gpr_r26_powerpc,
59    gpr_r27_powerpc,
60    gpr_r28_powerpc,
61    gpr_r29_powerpc,
62    gpr_r30_powerpc,
63    gpr_r31_powerpc,
64    gpr_lr_powerpc,
65    gpr_cr_powerpc,
66    gpr_xer_powerpc,
67    gpr_ctr_powerpc,
68    gpr_pc_powerpc,
69};
70
71static const
72uint32_t g_fpr_regnums[] =
73{
74    fpr_f0_powerpc,
75    fpr_f1_powerpc,
76    fpr_f2_powerpc,
77    fpr_f3_powerpc,
78    fpr_f4_powerpc,
79    fpr_f5_powerpc,
80    fpr_f6_powerpc,
81    fpr_f7_powerpc,
82    fpr_f8_powerpc,
83    fpr_f9_powerpc,
84    fpr_f10_powerpc,
85    fpr_f11_powerpc,
86    fpr_f12_powerpc,
87    fpr_f13_powerpc,
88    fpr_f14_powerpc,
89    fpr_f15_powerpc,
90    fpr_f16_powerpc,
91    fpr_f17_powerpc,
92    fpr_f18_powerpc,
93    fpr_f19_powerpc,
94    fpr_f20_powerpc,
95    fpr_f21_powerpc,
96    fpr_f22_powerpc,
97    fpr_f23_powerpc,
98    fpr_f24_powerpc,
99    fpr_f25_powerpc,
100    fpr_f26_powerpc,
101    fpr_f27_powerpc,
102    fpr_f28_powerpc,
103    fpr_f29_powerpc,
104    fpr_f30_powerpc,
105    fpr_f31_powerpc,
106    fpr_fpscr_powerpc,
107};
108
109// Number of register sets provided by this context.
110enum
111{
112    k_num_register_sets = 2
113};
114
115static const RegisterSet
116g_reg_sets_powerpc[k_num_register_sets] =
117{
118    { "General Purpose Registers",  "gpr", k_num_gpr_registers_powerpc, g_gpr_regnums },
119    { "Floating Point Registers",  "fpr", k_num_fpr_registers_powerpc, g_fpr_regnums },
120};
121
122bool RegisterContextPOSIX_powerpc::IsGPR(unsigned reg)
123{
124    return reg <= k_num_gpr_registers_powerpc;   // GPR's come first.
125}
126
127bool
128RegisterContextPOSIX_powerpc::IsFPR(unsigned reg)
129{
130    // XXX
131    return (reg >= k_first_fpr) && (reg <= k_last_fpr);
132}
133
134RegisterContextPOSIX_powerpc::RegisterContextPOSIX_powerpc(Thread &thread,
135                                               uint32_t concrete_frame_idx,
136                                               RegisterInfoInterface *register_info)
137    : RegisterContext(thread, concrete_frame_idx)
138{
139    m_register_info_ap.reset(register_info);
140
141    // elf-core yet to support ReadFPR()
142    ProcessSP base = CalculateProcess();
143    if (base.get()->GetPluginName() ==  ProcessElfCore::GetPluginNameStatic())
144        return;
145}
146
147RegisterContextPOSIX_powerpc::~RegisterContextPOSIX_powerpc()
148{
149}
150
151void
152RegisterContextPOSIX_powerpc::Invalidate()
153{
154}
155
156void
157RegisterContextPOSIX_powerpc::InvalidateAllRegisters()
158{
159}
160
161unsigned
162RegisterContextPOSIX_powerpc::GetRegisterOffset(unsigned reg)
163{
164    assert(reg < k_num_registers_powerpc && "Invalid register number.");
165    return GetRegisterInfo()[reg].byte_offset;
166}
167
168unsigned
169RegisterContextPOSIX_powerpc::GetRegisterSize(unsigned reg)
170{
171    assert(reg < k_num_registers_powerpc && "Invalid register number.");
172    return GetRegisterInfo()[reg].byte_size;
173}
174
175size_t
176RegisterContextPOSIX_powerpc::GetRegisterCount()
177{
178    size_t num_registers = k_num_registers_powerpc;
179    return num_registers;
180}
181
182size_t
183RegisterContextPOSIX_powerpc::GetGPRSize()
184{
185    return m_register_info_ap->GetGPRSize();
186}
187
188const RegisterInfo *
189RegisterContextPOSIX_powerpc::GetRegisterInfo()
190{
191    // Commonly, this method is overridden and g_register_infos is copied and specialized.
192    // So, use GetRegisterInfo() rather than g_register_infos in this scope.
193    return m_register_info_ap->GetRegisterInfo ();
194}
195
196const RegisterInfo *
197RegisterContextPOSIX_powerpc::GetRegisterInfoAtIndex(size_t reg)
198{
199    if (reg < k_num_registers_powerpc)
200        return &GetRegisterInfo()[reg];
201    else
202        return NULL;
203}
204
205size_t
206RegisterContextPOSIX_powerpc::GetRegisterSetCount()
207{
208    size_t sets = 0;
209    for (size_t set = 0; set < k_num_register_sets; ++set)
210    {
211        if (IsRegisterSetAvailable(set))
212            ++sets;
213    }
214
215    return sets;
216}
217
218const RegisterSet *
219RegisterContextPOSIX_powerpc::GetRegisterSet(size_t set)
220{
221    if (IsRegisterSetAvailable(set))
222        return &g_reg_sets_powerpc[set];
223    else
224        return NULL;
225}
226
227const char *
228RegisterContextPOSIX_powerpc::GetRegisterName(unsigned reg)
229{
230    assert(reg < k_num_registers_powerpc && "Invalid register offset.");
231    return GetRegisterInfo()[reg].name;
232}
233
234lldb::ByteOrder
235RegisterContextPOSIX_powerpc::GetByteOrder()
236{
237    // Get the target process whose privileged thread was used for the register read.
238    lldb::ByteOrder byte_order = eByteOrderInvalid;
239    Process *process = CalculateProcess().get();
240
241    if (process)
242        byte_order = process->GetByteOrder();
243    return byte_order;
244}
245
246bool
247RegisterContextPOSIX_powerpc::IsRegisterSetAvailable(size_t set_index)
248{
249    size_t num_sets = k_num_register_sets;
250
251    return (set_index < num_sets);
252}
253
254// Used when parsing DWARF and EH frame information and any other
255// object file sections that contain register numbers in them.
256uint32_t
257RegisterContextPOSIX_powerpc::ConvertRegisterKindToRegisterNumber(lldb::RegisterKind kind,
258                                                                 uint32_t num)
259{
260    const uint32_t num_regs = GetRegisterCount();
261
262    assert (kind < kNumRegisterKinds);
263    for (uint32_t reg_idx = 0; reg_idx < num_regs; ++reg_idx)
264    {
265        const RegisterInfo *reg_info = GetRegisterInfoAtIndex (reg_idx);
266
267        if (reg_info->kinds[kind] == num)
268            return reg_idx;
269    }
270
271    return LLDB_INVALID_REGNUM;
272}
273
274