1 //===-- RegisterInfoPOSIX_arm64.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_arm64.h"
18 
19 // Based on RegisterContextDarwin_arm64.cpp
20 #define GPR_OFFSET(idx) ((idx)*8)
21 #define GPR_OFFSET_NAME(reg)                                                   \
22   (LLVM_EXTENSION offsetof(RegisterInfoPOSIX_arm64::GPR, reg))
23 
24 #define FPU_OFFSET(idx) ((idx)*16 + sizeof(RegisterInfoPOSIX_arm64::GPR))
25 #define FPU_OFFSET_NAME(reg)                                                   \
26   (LLVM_EXTENSION offsetof(RegisterInfoPOSIX_arm64::FPU, reg) +                \
27    sizeof(RegisterInfoPOSIX_arm64::GPR))
28 
29 #define EXC_OFFSET_NAME(reg)                                                   \
30   (LLVM_EXTENSION offsetof(RegisterInfoPOSIX_arm64::EXC, reg) +                \
31    sizeof(RegisterInfoPOSIX_arm64::GPR) +                                      \
32    sizeof(RegisterInfoPOSIX_arm64::FPU))
33 #define DBG_OFFSET_NAME(reg)                                                   \
34   (LLVM_EXTENSION offsetof(RegisterInfoPOSIX_arm64::DBG, reg) +                \
35    sizeof(RegisterInfoPOSIX_arm64::GPR) +                                      \
36    sizeof(RegisterInfoPOSIX_arm64::FPU) +                                      \
37    sizeof(RegisterInfoPOSIX_arm64::EXC))
38 
39 #define DEFINE_DBG(reg, i)                                                     \
40   #reg, NULL,                                                                  \
41       sizeof(((RegisterInfoPOSIX_arm64::DBG *) NULL)->reg[i]),                 \
42               DBG_OFFSET_NAME(reg[i]), lldb::eEncodingUint, lldb::eFormatHex,  \
43                               {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,       \
44                                LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,       \
45                                dbg_##reg##i },                                 \
46                                NULL, NULL, NULL, 0
47 #define REG_CONTEXT_SIZE                                                       \
48   (sizeof(RegisterInfoPOSIX_arm64::GPR) +                                      \
49    sizeof(RegisterInfoPOSIX_arm64::FPU) +                                      \
50    sizeof(RegisterInfoPOSIX_arm64::EXC))
51 
52 //-----------------------------------------------------------------------------
53 // Include RegisterInfos_arm64 to declare our g_register_infos_arm64 structure.
54 //-----------------------------------------------------------------------------
55 #define DECLARE_REGISTER_INFOS_ARM64_STRUCT
56 #include "RegisterInfos_arm64.h"
57 #undef DECLARE_REGISTER_INFOS_ARM64_STRUCT
58 
59 static const lldb_private::RegisterInfo *
60 GetRegisterInfoPtr(const lldb_private::ArchSpec &target_arch) {
61   switch (target_arch.GetMachine()) {
62   case llvm::Triple::aarch64:
63     return g_register_infos_arm64_le;
64   default:
65     assert(false && "Unhandled target architecture.");
66     return NULL;
67   }
68 }
69 
70 static uint32_t
71 GetRegisterInfoCount(const lldb_private::ArchSpec &target_arch) {
72   switch (target_arch.GetMachine()) {
73   case llvm::Triple::aarch64:
74     return static_cast<uint32_t>(sizeof(g_register_infos_arm64_le) /
75                                  sizeof(g_register_infos_arm64_le[0]));
76   default:
77     assert(false && "Unhandled target architecture.");
78     return 0;
79   }
80 }
81 
82 RegisterInfoPOSIX_arm64::RegisterInfoPOSIX_arm64(
83     const lldb_private::ArchSpec &target_arch)
84     : lldb_private::RegisterInfoInterface(target_arch),
85       m_register_info_p(GetRegisterInfoPtr(target_arch)),
86       m_register_info_count(GetRegisterInfoCount(target_arch)) {}
87 
88 size_t RegisterInfoPOSIX_arm64::GetGPRSize() const {
89   return sizeof(struct RegisterInfoPOSIX_arm64::GPR);
90 }
91 
92 const lldb_private::RegisterInfo *
93 RegisterInfoPOSIX_arm64::GetRegisterInfo() const {
94   return m_register_info_p;
95 }
96 
97 uint32_t RegisterInfoPOSIX_arm64::GetRegisterCount() const {
98   return m_register_info_count;
99 }
100