1 //===-- RegisterInfoPOSIX_arm.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 <cassert>
11 #include <stddef.h>
12 #include <vector>
13 
14 #include "lldb/lldb-defines.h"
15 #include "llvm/Support/Compiler.h"
16 
17 #include "RegisterInfoPOSIX_arm.h"
18 
19 using namespace lldb;
20 using namespace lldb_private;
21 
22 // Based on RegisterContextDarwin_arm.cpp
23 #define GPR_OFFSET(idx) ((idx)*4)
24 #define FPU_OFFSET(idx) ((idx)*4 + sizeof(RegisterInfoPOSIX_arm::GPR))
25 #define FPSCR_OFFSET                                                           \
26   (LLVM_EXTENSION offsetof(RegisterInfoPOSIX_arm::FPU, fpscr) +                \
27    sizeof(RegisterInfoPOSIX_arm::GPR))
28 #define EXC_OFFSET(idx)                                                        \
29   ((idx)*4 + sizeof(RegisterInfoPOSIX_arm::GPR) +                              \
30    sizeof(RegisterInfoPOSIX_arm::FPU))
31 #define DBG_OFFSET(reg)                                                        \
32   ((LLVM_EXTENSION offsetof(RegisterInfoPOSIX_arm::DBG, reg) +                 \
33     sizeof(RegisterInfoPOSIX_arm::GPR) + sizeof(RegisterInfoPOSIX_arm::FPU) +  \
34     sizeof(RegisterInfoPOSIX_arm::EXC)))
35 
36 #define DEFINE_DBG(reg, i)                                                     \
37   #reg, NULL, sizeof(((RegisterInfoPOSIX_arm::DBG *) NULL)->reg[i]),           \
38                       DBG_OFFSET(reg[i]), eEncodingUint, eFormatHex,           \
39                                  {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,    \
40                                   LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,    \
41                                   dbg_##reg##i },                              \
42                                   NULL, NULL, NULL, 0
43 #define REG_CONTEXT_SIZE                                                       \
44   (sizeof(RegisterInfoPOSIX_arm::GPR) + sizeof(RegisterInfoPOSIX_arm::FPU) +   \
45    sizeof(RegisterInfoPOSIX_arm::EXC))
46 
47 //-----------------------------------------------------------------------------
48 // Include RegisterInfos_arm to declare our g_register_infos_arm structure.
49 //-----------------------------------------------------------------------------
50 #define DECLARE_REGISTER_INFOS_ARM_STRUCT
51 #include "RegisterInfos_arm.h"
52 #undef DECLARE_REGISTER_INFOS_ARM_STRUCT
53 
54 static const lldb_private::RegisterInfo *
55 GetRegisterInfoPtr(const lldb_private::ArchSpec &target_arch) {
56   switch (target_arch.GetMachine()) {
57   case llvm::Triple::arm:
58     return g_register_infos_arm;
59   default:
60     assert(false && "Unhandled target architecture.");
61     return NULL;
62   }
63 }
64 
65 static uint32_t
66 GetRegisterInfoCount(const lldb_private::ArchSpec &target_arch) {
67   switch (target_arch.GetMachine()) {
68   case llvm::Triple::arm:
69     return static_cast<uint32_t>(sizeof(g_register_infos_arm) /
70                                  sizeof(g_register_infos_arm[0]));
71   default:
72     assert(false && "Unhandled target architecture.");
73     return 0;
74   }
75 }
76 
77 RegisterInfoPOSIX_arm::RegisterInfoPOSIX_arm(
78     const lldb_private::ArchSpec &target_arch)
79     : lldb_private::RegisterInfoInterface(target_arch),
80       m_register_info_p(GetRegisterInfoPtr(target_arch)),
81       m_register_info_count(GetRegisterInfoCount(target_arch)) {}
82 
83 size_t RegisterInfoPOSIX_arm::GetGPRSize() const {
84   return sizeof(struct RegisterInfoPOSIX_arm::GPR);
85 }
86 
87 const lldb_private::RegisterInfo *
88 RegisterInfoPOSIX_arm::GetRegisterInfo() const {
89   return m_register_info_p;
90 }
91 
92 uint32_t RegisterInfoPOSIX_arm::GetRegisterCount() const {
93   return m_register_info_count;
94 }
95