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ABISysV_mips64.h
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1 //===-- ABISysV_mips64.h ----------------------------------------*- 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 #ifndef LLDB_SOURCE_PLUGINS_ABI_MIPS_ABISYSV_MIPS64_H
10 #define LLDB_SOURCE_PLUGINS_ABI_MIPS_ABISYSV_MIPS64_H
11 
12 #include "lldb/Target/ABI.h"
13 #include "lldb/lldb-private.h"
14 
16 public:
17  ~ABISysV_mips64() override = default;
18 
19  size_t GetRedZoneSize() const override;
20 
22  lldb::addr_t functionAddress,
23  lldb::addr_t returnAddress,
24  llvm::ArrayRef<lldb::addr_t> args) const override;
25 
27  lldb_private::ValueList &values) const override;
28 
30  SetReturnValueObject(lldb::StackFrameSP &frame_sp,
31  lldb::ValueObjectSP &new_value) override;
32 
33  lldb::ValueObjectSP
35  lldb_private::CompilerType &type) const override;
36 
37  bool
39 
40  bool CreateDefaultUnwindPlan(lldb_private::UnwindPlan &unwind_plan) override;
41 
42  bool RegisterIsVolatile(const lldb_private::RegisterInfo *reg_info) override;
43 
44  bool IsSoftFloat(uint32_t fp_flag) const;
45 
46  // The SysV mips ABI requires that stack frames be 16 byte aligned.
47  // When there is a trap handler on the stack, e.g. _sigtramp in userland
48  // code, we've seen that the stack pointer is often not aligned properly
49  // before the handler is invoked. This means that lldb will stop the unwind
50  // early -- before the function which caused the trap.
51  //
52  // To work around this, we relax that alignment to be just word-size
53  // (8-bytes).
54  // Allowing the trap handlers for user space would be easy (_sigtramp) but
55  // in other environments there can be a large number of different functions
56  // involved in async traps.
58  // Make sure the stack call frame addresses are 8 byte aligned
59  if (cfa & (8ull - 1ull))
60  return false; // Not 8 byte aligned
61  if (cfa == 0)
62  return false; // Zero is not a valid stack address
63  return true;
64  }
65 
67  if (pc & (4ull - 1ull))
68  return false; // Not 4 byte aligned
69 
70  // Anything else if fair game..
71  return true;
72  }
73 
74  const lldb_private::RegisterInfo *
75  GetRegisterInfoArray(uint32_t &count) override;
76 
77  // Static Functions
78 
79  static void Initialize();
80 
81  static void Terminate();
82 
83  static lldb::ABISP CreateInstance(lldb::ProcessSP process_sp, const lldb_private::ArchSpec &arch);
84 
86 
87  // PluginInterface protocol
88 
90 
91 protected:
93 
94  lldb::ValueObjectSP
96  lldb_private::CompilerType &ast_type) const;
97 
98  bool RegisterIsCalleeSaved(const lldb_private::RegisterInfo *reg_info);
99 
100 private:
101  using lldb_private::RegInfoBasedABI::RegInfoBasedABI; // Call CreateInstance instead.
102 };
103 
104 #endif // LLDB_SOURCE_PLUGINS_ABI_MIPS_ABISYSV_MIPS64_H
ABISysV_mips64::IsSoftFloat
bool IsSoftFloat(uint32_t fp_flag) const
Definition: ABISysV_mips64.cpp:1176
lldb_private::ArchSpec
Definition: ArchSpec.h:33
ABISysV_mips64::Initialize
static void Initialize()
Definition: ABISysV_mips64.cpp:1195
ABISysV_mips64::CallFrameAddressIsValid
bool CallFrameAddressIsValid(lldb::addr_t cfa) override
Definition: ABISysV_mips64.h:57
ABISysV_mips64::CreateRegisterMapIfNeeded
void CreateRegisterMapIfNeeded()
ABISysV_mips64::CreateInstance
static lldb::ABISP CreateInstance(lldb::ProcessSP process_sp, const lldb_private::ArchSpec &arch)
Definition: ABISysV_mips64.cpp:557
ABISysV_mips64::GetReturnValueObjectSimple
lldb::ValueObjectSP GetReturnValueObjectSimple(lldb_private::Thread &thread, lldb_private::CompilerType &ast_type) const
Definition: ABISysV_mips64.cpp:730
ABISysV_mips64::GetPluginName
lldb_private::ConstString GetPluginName() override
Definition: ABISysV_mips64.cpp:1211
lldb_private::ValueList
Definition: Value.h:157
lldb::addr_t
uint64_t addr_t
Definition: lldb-types.h:83
pc
@ pc
Definition: CompactUnwindInfo.cpp:1250
ABI.h
ABISysV_mips64::GetRedZoneSize
size_t GetRedZoneSize() const override
Definition: ABISysV_mips64.cpp:552
ABISysV_mips64::CreateDefaultUnwindPlan
bool CreateDefaultUnwindPlan(lldb_private::UnwindPlan &unwind_plan) override
Definition: ABISysV_mips64.cpp:1153
ABISysV_mips64::Terminate
static void Terminate()
Definition: ABISysV_mips64.cpp:1200
ABISysV_mips64::~ABISysV_mips64
~ABISysV_mips64() override=default
ABISysV_mips64::GetArgumentValues
bool GetArgumentValues(lldb_private::Thread &thread, lldb_private::ValueList &values) const override
Definition: ABISysV_mips64.cpp:655
lldb_private::Thread
Definition: Thread.h:62
ABISysV_mips64::GetReturnValueObjectImpl
lldb::ValueObjectSP GetReturnValueObjectImpl(lldb_private::Thread &thread, lldb_private::CompilerType &type) const override
Definition: ABISysV_mips64.cpp:736
lldb_private::ConstString
Definition: ConstString.h:40
ABISysV_mips64
Definition: ABISysV_mips64.h:15
sp
@ sp
Definition: CompactUnwindInfo.cpp:1249
ABISysV_mips64::RegisterIsVolatile
bool RegisterIsVolatile(const lldb_private::RegisterInfo *reg_info) override
Definition: ABISysV_mips64.cpp:1172
lldb_private::RegInfoBasedABI
Definition: ABI.h:160
ABISysV_mips64::PrepareTrivialCall
bool PrepareTrivialCall(lldb_private::Thread &thread, lldb::addr_t sp, lldb::addr_t functionAddress, lldb::addr_t returnAddress, llvm::ArrayRef< lldb::addr_t > args) const override
Definition: ABISysV_mips64.cpp:564
lldb-private.h
ABISysV_mips64::SetReturnValueObject
lldb_private::Status SetReturnValueObject(lldb::StackFrameSP &frame_sp, lldb::ValueObjectSP &new_value) override
Definition: ABISysV_mips64.cpp:660
lldb_private::Status
Definition: Status.h:44
ABISysV_mips64::CodeAddressIsValid
bool CodeAddressIsValid(lldb::addr_t pc) override
Definition: ABISysV_mips64.h:66
ABISysV_mips64::GetPluginNameStatic
static lldb_private::ConstString GetPluginNameStatic()
Definition: ABISysV_mips64.cpp:1204
uint32_t
lldb_private::CompilerType
Generic representation of a type in a programming language.
Definition: CompilerType.h:33
ABISysV_mips64::GetRegisterInfoArray
const lldb_private::RegisterInfo * GetRegisterInfoArray(uint32_t &count) override
Definition: ABISysV_mips64.cpp:547
ABISysV_mips64::RegisterIsCalleeSaved
bool RegisterIsCalleeSaved(const lldb_private::RegisterInfo *reg_info)
Definition: ABISysV_mips64.cpp:1180
ABISysV_mips64::CreateFunctionEntryUnwindPlan
bool CreateFunctionEntryUnwindPlan(lldb_private::UnwindPlan &unwind_plan) override
Definition: ABISysV_mips64.cpp:1132
lldb_private::UnwindPlan
Definition: UnwindPlan.h:53