1 //===-- ABISysV_mips.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_MIPS_H
10 #define LLDB_SOURCE_PLUGINS_ABI_MIPS_ABISYSV_MIPS_H
11 
12 #include "lldb/Target/ABI.h"
13 #include "lldb/lldb-private.h"
14 
15 class ABISysV_mips : public lldb_private::RegInfoBasedABI {
16 public:
17   ~ABISysV_mips() override = default;
18 
19   size_t GetRedZoneSize() const override;
20 
21   bool PrepareTrivialCall(lldb_private::Thread &thread, lldb::addr_t sp,
22                           lldb::addr_t functionAddress,
23                           lldb::addr_t returnAddress,
24                           llvm::ArrayRef<lldb::addr_t> args) const override;
25 
26   bool GetArgumentValues(lldb_private::Thread &thread,
27                          lldb_private::ValueList &values) const override;
28 
29   lldb_private::Status
30   SetReturnValueObject(lldb::StackFrameSP &frame_sp,
31                        lldb::ValueObjectSP &new_value) override;
32 
33   lldb::ValueObjectSP
34   GetReturnValueObjectImpl(lldb_private::Thread &thread,
35                            lldb_private::CompilerType &type) const override;
36 
37   bool
38   CreateFunctionEntryUnwindPlan(lldb_private::UnwindPlan &unwind_plan) override;
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 
CallFrameAddressIsValid(lldb::addr_t cfa)46   bool CallFrameAddressIsValid(lldb::addr_t cfa) override {
47     // Make sure the stack call frame addresses are 8 byte aligned
48     if (cfa & (8ull - 1ull))
49       return false; // Not 8 byte aligned
50     if (cfa == 0)
51       return false; // Zero is not a valid stack address
52     return true;
53   }
54 
CodeAddressIsValid(lldb::addr_t pc)55   bool CodeAddressIsValid(lldb::addr_t pc) override {
56     // Just make sure the address is a valid 32 bit address. Bit zero
57     // might be set due to MicroMIPS function calls, so don't enforce alignment.
58     return (pc <= UINT32_MAX);
59   }
60 
61   const lldb_private::RegisterInfo *
62   GetRegisterInfoArray(uint32_t &count) override;
63 
64   // Static Functions
65 
66   static void Initialize();
67 
68   static void Terminate();
69 
70   static lldb::ABISP CreateInstance(lldb::ProcessSP process_sp, const lldb_private::ArchSpec &arch);
71 
72   static lldb_private::ConstString GetPluginNameStatic();
73 
74   // PluginInterface protocol
75 
76   lldb_private::ConstString GetPluginName() override;
77 
78   uint32_t GetPluginVersion() override;
79 
80 protected:
81   void CreateRegisterMapIfNeeded();
82 
83   lldb::ValueObjectSP
84   GetReturnValueObjectSimple(lldb_private::Thread &thread,
85                              lldb_private::CompilerType &ast_type) const;
86 
87   bool RegisterIsCalleeSaved(const lldb_private::RegisterInfo *reg_info);
88 
89 private:
90   using lldb_private::RegInfoBasedABI::RegInfoBasedABI; // Call CreateInstance instead.
91 };
92 
93 #endif // LLDB_SOURCE_PLUGINS_ABI_MIPS_ABISYSV_MIPS_H
94