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ABISysV_ppc.h
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1 //===-- ABISysV_ppc.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_POWERPC_ABISYSV_PPC_H
10 #define LLDB_SOURCE_PLUGINS_ABI_POWERPC_ABISYSV_PPC_H
11 
12 #include "lldb/Target/ABI.h"
13 #include "lldb/lldb-private.h"
14 
16 public:
17  ~ABISysV_ppc() 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  // The SysV ppc ABI requires that stack frames be 16 byte aligned.
45  // When there is a trap handler on the stack, e.g. _sigtramp in userland
46  // code, we've seen that the stack pointer is often not aligned properly
47  // before the handler is invoked. This means that lldb will stop the unwind
48  // early -- before the function which caused the trap.
49  //
50  // To work around this, we relax that alignment to be just word-size
51  // (8-bytes).
52  // Allowing the trap handlers for user space would be easy (_sigtramp) but
53  // in other environments there can be a large number of different functions
54  // involved in async traps.
56  // Make sure the stack call frame addresses are 8 byte aligned
57  if (cfa & (8ull - 1ull))
58  return false; // Not 8 byte aligned
59  if (cfa == 0)
60  return false; // Zero is not a valid stack address
61  return true;
62  }
63 
65  // We have a 64 bit address space, so anything is valid as opcodes
66  // aren't fixed width...
67  return true;
68  }
69 
70  const lldb_private::RegisterInfo *
71  GetRegisterInfoArray(uint32_t &count) override;
72 
73  // Static Functions
74 
75  static void Initialize();
76 
77  static void Terminate();
78 
79  static lldb::ABISP CreateInstance(lldb::ProcessSP process_sp, const lldb_private::ArchSpec &arch);
80 
82 
83  // PluginInterface protocol
84 
86 
87  uint32_t GetPluginVersion() override;
88 
89 protected:
91 
92  lldb::ValueObjectSP
94  lldb_private::CompilerType &ast_type) const;
95 
96  bool RegisterIsCalleeSaved(const lldb_private::RegisterInfo *reg_info);
97 
98 private:
99  using lldb_private::RegInfoBasedABI::RegInfoBasedABI; // Call CreateInstance instead.
100 };
101 
102 #endif // LLDB_SOURCE_PLUGINS_ABI_POWERPC_ABISYSV_PPC_H
ABISysV_ppc::Terminate
static void Terminate()
Definition: ABISysV_ppc.cpp:963
lldb_private::ArchSpec
Definition: ArchSpec.h:33
ABISysV_ppc::CreateDefaultUnwindPlan
bool CreateDefaultUnwindPlan(lldb_private::UnwindPlan &unwind_plan) override
Definition: ABISysV_ppc.cpp:888
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
ABISysV_ppc::GetRegisterInfoArray
const lldb_private::RegisterInfo * GetRegisterInfoArray(uint32_t &count) override
Definition: ABISysV_ppc.cpp:211
ABISysV_ppc::GetPluginName
lldb_private::ConstString GetPluginName() override
Definition: ABISysV_ppc.cpp:974
ABI.h
ABISysV_ppc::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_ppc.cpp:229
ABISysV_ppc::GetRedZoneSize
size_t GetRedZoneSize() const override
Definition: ABISysV_ppc.cpp:216
lldb_private::Thread
Definition: Thread.h:62
ABISysV_ppc::CallFrameAddressIsValid
bool CallFrameAddressIsValid(lldb::addr_t cfa) override
Definition: ABISysV_ppc.h:55
ABISysV_ppc::CreateInstance
static lldb::ABISP CreateInstance(lldb::ProcessSP process_sp, const lldb_private::ArchSpec &arch)
Definition: ABISysV_ppc.cpp:221
ABISysV_ppc::CreateFunctionEntryUnwindPlan
bool CreateFunctionEntryUnwindPlan(lldb_private::UnwindPlan &unwind_plan) override
Definition: ABISysV_ppc.cpp:863
ABISysV_ppc::Initialize
static void Initialize()
Definition: ABISysV_ppc.cpp:958
lldb_private::ConstString
Definition: ConstString.h:40
ABISysV_ppc::GetPluginVersion
uint32_t GetPluginVersion() override
Definition: ABISysV_ppc.cpp:978
ABISysV_ppc::~ABISysV_ppc
~ABISysV_ppc() override=default
sp
@ sp
Definition: CompactUnwindInfo.cpp:1249
ABISysV_ppc::GetArgumentValues
bool GetArgumentValues(lldb_private::Thread &thread, lldb_private::ValueList &values) const override
Definition: ABISysV_ppc.cpp:338
lldb_private::RegInfoBasedABI
Definition: ABI.h:160
ABISysV_ppc::CreateRegisterMapIfNeeded
void CreateRegisterMapIfNeeded()
lldb-private.h
ABISysV_ppc::GetPluginNameStatic
static lldb_private::ConstString GetPluginNameStatic()
Definition: ABISysV_ppc.cpp:967
lldb_private::Status
Definition: Status.h:44
uint32_t
ABISysV_ppc::CodeAddressIsValid
bool CodeAddressIsValid(lldb::addr_t pc) override
Definition: ABISysV_ppc.h:64
ABISysV_ppc::RegisterIsVolatile
bool RegisterIsVolatile(const lldb_private::RegisterInfo *reg_info) override
Definition: ABISysV_ppc.cpp:913
ABISysV_ppc::GetReturnValueObjectSimple
lldb::ValueObjectSP GetReturnValueObjectSimple(lldb_private::Thread &thread, lldb_private::CompilerType &ast_type) const
Definition: ABISysV_ppc.cpp:506
lldb_private::CompilerType
Generic representation of a type in a programming language.
Definition: CompilerType.h:33
ABISysV_ppc::RegisterIsCalleeSaved
bool RegisterIsCalleeSaved(const lldb_private::RegisterInfo *reg_info)
Definition: ABISysV_ppc.cpp:923
ABISysV_ppc
Definition: ABISysV_ppc.h:15
lldb_private::UnwindPlan
Definition: UnwindPlan.h:53
ABISysV_ppc::SetReturnValueObject
lldb_private::Status SetReturnValueObject(lldb::StackFrameSP &frame_sp, lldb::ValueObjectSP &new_value) override
Definition: ABISysV_ppc.cpp:414
ABISysV_ppc::GetReturnValueObjectImpl
lldb::ValueObjectSP GetReturnValueObjectImpl(lldb_private::Thread &thread, lldb_private::CompilerType &type) const override
Definition: ABISysV_ppc.cpp:645