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
18using namespace lldb;
19using 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// Include RegisterInfos_arm to declare our g_register_infos_arm structure.
47#define DECLARE_REGISTER_INFOS_ARM_STRUCT
48#include "RegisterInfos_arm.h"
49#undef DECLARE_REGISTER_INFOS_ARM_STRUCT
50
51static const lldb_private::RegisterInfo *
52GetRegisterInfoPtr(const lldb_private::ArchSpec &target_arch) {
53  switch (target_arch.GetMachine()) {
54  case llvm::Triple::arm:
55    return g_register_infos_arm;
56  default:
57    assert(false && "Unhandled target architecture.");
58    return nullptr;
59  }
60}
61
62static uint32_t
63GetRegisterInfoCount(const lldb_private::ArchSpec &target_arch) {
64  switch (target_arch.GetMachine()) {
65  case llvm::Triple::arm:
66    return static_cast<uint32_t>(sizeof(g_register_infos_arm) /
67                                 sizeof(g_register_infos_arm[0]));
68  default:
69    assert(false && "Unhandled target architecture.");
70    return 0;
71  }
72}
73
74RegisterInfoPOSIX_arm::RegisterInfoPOSIX_arm(
75    const lldb_private::ArchSpec &target_arch)
76    : lldb_private::RegisterInfoInterface(target_arch),
77      m_register_info_p(GetRegisterInfoPtr(target_arch)),
78      m_register_info_count(GetRegisterInfoCount(target_arch)) {}
79
80size_t RegisterInfoPOSIX_arm::GetGPRSize() const {
81  return sizeof(struct RegisterInfoPOSIX_arm::GPR);
82}
83
84const lldb_private::RegisterInfo *
85RegisterInfoPOSIX_arm::GetRegisterInfo() const {
86  return m_register_info_p;
87}
88
89uint32_t RegisterInfoPOSIX_arm::GetRegisterCount() const {
90  return m_register_info_count;
91}
92