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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
16public:
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
85 static llvm::StringRef GetPluginNameStatic() { return "sysv-mips64"; }
86
87 // PluginInterface protocol
88
89 llvm::StringRef GetPluginName() override { return GetPluginNameStatic(); }
90
91protected:
93
94 lldb::ValueObjectSP
96 lldb_private::CompilerType &ast_type) const;
97
98 bool RegisterIsCalleeSaved(const lldb_private::RegisterInfo *reg_info);
99
100private:
101 using lldb_private::RegInfoBasedABI::RegInfoBasedABI; // Call CreateInstance instead.
102};
103
104#endif // LLDB_SOURCE_PLUGINS_ABI_MIPS_ABISYSV_MIPS64_H
static llvm::StringRef GetPluginNameStatic()
bool RegisterIsCalleeSaved(const lldb_private::RegisterInfo *reg_info)
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
lldb_private::Status SetReturnValueObject(lldb::StackFrameSP &frame_sp, lldb::ValueObjectSP &new_value) override
bool RegisterIsVolatile(const lldb_private::RegisterInfo *reg_info) override
static void Initialize()
bool CodeAddressIsValid(lldb::addr_t pc) override
const lldb_private::RegisterInfo * GetRegisterInfoArray(uint32_t &count) override
static void Terminate()
lldb::ValueObjectSP GetReturnValueObjectSimple(lldb_private::Thread &thread, lldb_private::CompilerType &ast_type) const
bool GetArgumentValues(lldb_private::Thread &thread, lldb_private::ValueList &values) const override
lldb::ValueObjectSP GetReturnValueObjectImpl(lldb_private::Thread &thread, lldb_private::CompilerType &type) const override
~ABISysV_mips64() override=default
bool CallFrameAddressIsValid(lldb::addr_t cfa) override
llvm::StringRef GetPluginName() override
bool IsSoftFloat(uint32_t fp_flag) const
bool CreateDefaultUnwindPlan(lldb_private::UnwindPlan &unwind_plan) override
size_t GetRedZoneSize() const override
void CreateRegisterMapIfNeeded()
static lldb::ABISP CreateInstance(lldb::ProcessSP process_sp, const lldb_private::ArchSpec &arch)
bool CreateFunctionEntryUnwindPlan(lldb_private::UnwindPlan &unwind_plan) override
An architecture specification class.
Definition: ArchSpec.h:32
Generic representation of a type in a programming language.
Definition: CompilerType.h:36
An error handling class.
Definition: Status.h:44
uint64_t addr_t
Definition: lldb-types.h:83