1 //===-- RegisterInfoPOSIX_arm.cpp ------------------------------*- C++ -*-===//
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 <cassert>
10 #include <stddef.h>
11 #include <vector>
12 
13 #include "lldb/lldb-defines.h"
14 #include "llvm/Support/Compiler.h"
15 
16 #include "RegisterInfoPOSIX_arm.h"
17 
18 using namespace lldb;
19 using namespace lldb_private;
20 
21 // Based on RegisterContextDarwin_arm.cpp
22 #define GPR_OFFSET(idx) ((idx)*4)
23 #define FPU_OFFSET(idx) ((idx)*4 + sizeof(RegisterInfoPOSIX_arm::GPR))
24 #define FPSCR_OFFSET                                                           \
25   (LLVM_EXTENSION offsetof(RegisterInfoPOSIX_arm::FPU, fpscr) +                \
26    sizeof(RegisterInfoPOSIX_arm::GPR))
27 #define EXC_OFFSET(idx)                                                        \
28   ((idx)*4 + sizeof(RegisterInfoPOSIX_arm::GPR) +                              \
29    sizeof(RegisterInfoPOSIX_arm::FPU))
30 #define DBG_OFFSET(reg)                                                        \
31   ((LLVM_EXTENSION offsetof(RegisterInfoPOSIX_arm::DBG, reg) +                 \
32     sizeof(RegisterInfoPOSIX_arm::GPR) + sizeof(RegisterInfoPOSIX_arm::FPU) +  \
33     sizeof(RegisterInfoPOSIX_arm::EXC)))
34 
35 #define DEFINE_DBG(reg, i)                                                     \
36   #reg, NULL, sizeof(((RegisterInfoPOSIX_arm::DBG *) NULL)->reg[i]),           \
37                       DBG_OFFSET(reg[i]), eEncodingUint, eFormatHex,           \
38                                  {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,    \
39                                   LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,    \
40                                   dbg_##reg##i },                              \
41                                   NULL, NULL, NULL, 0
42 #define REG_CONTEXT_SIZE                                                       \
43   (sizeof(RegisterInfoPOSIX_arm::GPR) + sizeof(RegisterInfoPOSIX_arm::FPU) +   \
44    sizeof(RegisterInfoPOSIX_arm::EXC))
45 
46 //-----------------------------------------------------------------------------
47 // Include RegisterInfos_arm to declare our g_register_infos_arm structure.
48 //-----------------------------------------------------------------------------
49 #define DECLARE_REGISTER_INFOS_ARM_STRUCT
50 #include "RegisterInfos_arm.h"
51 #undef DECLARE_REGISTER_INFOS_ARM_STRUCT
52 
53 static const lldb_private::RegisterInfo *
54 GetRegisterInfoPtr(const lldb_private::ArchSpec &target_arch) {
55   switch (target_arch.GetMachine()) {
56   case llvm::Triple::arm:
57     return g_register_infos_arm;
58   default:
59     assert(false && "Unhandled target architecture.");
60     return NULL;
61   }
62 }
63 
64 static uint32_t
65 GetRegisterInfoCount(const lldb_private::ArchSpec &target_arch) {
66   switch (target_arch.GetMachine()) {
67   case llvm::Triple::arm:
68     return static_cast<uint32_t>(sizeof(g_register_infos_arm) /
69                                  sizeof(g_register_infos_arm[0]));
70   default:
71     assert(false && "Unhandled target architecture.");
72     return 0;
73   }
74 }
75 
76 RegisterInfoPOSIX_arm::RegisterInfoPOSIX_arm(
77     const lldb_private::ArchSpec &target_arch)
78     : lldb_private::RegisterInfoInterface(target_arch),
79       m_register_info_p(GetRegisterInfoPtr(target_arch)),
80       m_register_info_count(GetRegisterInfoCount(target_arch)) {}
81 
82 size_t RegisterInfoPOSIX_arm::GetGPRSize() const {
83   return sizeof(struct RegisterInfoPOSIX_arm::GPR);
84 }
85 
86 const lldb_private::RegisterInfo *
87 RegisterInfoPOSIX_arm::GetRegisterInfo() const {
88   return m_register_info_p;
89 }
90 
91 uint32_t RegisterInfoPOSIX_arm::GetRegisterCount() const {
92   return m_register_info_count;
93 }
94