1 //===-- ABISysV_hexagon.h ----------------------------------------*- C++
2 //-*-===//
3 //
4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5 // See https://llvm.org/LICENSE.txt for license information.
6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #ifndef LLDB_SOURCE_PLUGINS_ABI_HEXAGON_ABISYSV_HEXAGON_H
11 #define LLDB_SOURCE_PLUGINS_ABI_HEXAGON_ABISYSV_HEXAGON_H
12 
13 #include "lldb/Target/ABI.h"
14 #include "lldb/lldb-private.h"
15 
16 class ABISysV_hexagon : public lldb_private::RegInfoBasedABI {
17 public:
18   ~ABISysV_hexagon() override = default;
19 
20   size_t GetRedZoneSize() const override;
21 
22   bool PrepareTrivialCall(lldb_private::Thread &thread, lldb::addr_t sp,
23                           lldb::addr_t functionAddress,
24                           lldb::addr_t returnAddress,
25                           llvm::ArrayRef<lldb::addr_t> args) const override;
26 
27   // special thread plan for GDB style non-jit function calls
28   bool
29   PrepareTrivialCall(lldb_private::Thread &thread, lldb::addr_t sp,
30                      lldb::addr_t functionAddress, lldb::addr_t returnAddress,
31                      llvm::Type &prototype,
32                      llvm::ArrayRef<ABI::CallArgument> args) const override;
33 
34   bool GetArgumentValues(lldb_private::Thread &thread,
35                          lldb_private::ValueList &values) const override;
36 
37   lldb_private::Status
38   SetReturnValueObject(lldb::StackFrameSP &frame_sp,
39                        lldb::ValueObjectSP &new_value) override;
40 
41   lldb::ValueObjectSP
42   GetReturnValueObjectImpl(lldb_private::Thread &thread,
43                            lldb_private::CompilerType &type) const override;
44 
45   // specialized to work with llvm IR types
46   lldb::ValueObjectSP GetReturnValueObjectImpl(lldb_private::Thread &thread,
47                                                llvm::Type &type) const override;
48 
49   bool
50   CreateFunctionEntryUnwindPlan(lldb_private::UnwindPlan &unwind_plan) override;
51 
52   bool CreateDefaultUnwindPlan(lldb_private::UnwindPlan &unwind_plan) override;
53 
54   bool RegisterIsVolatile(const lldb_private::RegisterInfo *reg_info) override;
55 
56   bool CallFrameAddressIsValid(lldb::addr_t cfa) override {
57     // Make sure the stack call frame addresses are 8 byte aligned
58     if (cfa & 0x07)
59       return false; // Not 8 byte aligned
60     if (cfa == 0)
61       return false; // Zero is not a valid stack address
62     return true;
63   }
64 
65   bool CodeAddressIsValid(lldb::addr_t pc) override {
66     // We have a 64 bit address space, so anything is valid as opcodes
67     // aren't fixed width...
68     return true;
69   }
70 
71   const lldb_private::RegisterInfo *
72   GetRegisterInfoArray(uint32_t &count) override;
73 
74   // Static Functions
75 
76   static void Initialize();
77 
78   static void Terminate();
79 
80   static lldb::ABISP CreateInstance(lldb::ProcessSP process_sp, const lldb_private::ArchSpec &arch);
81 
82   static llvm::StringRef GetPluginNameStatic() { return "sysv-hexagon"; }
83 
84   // PluginInterface protocol
85 
86   llvm::StringRef GetPluginName() override { return GetPluginNameStatic(); }
87 
88 protected:
89   void CreateRegisterMapIfNeeded();
90 
91   lldb::ValueObjectSP
92   GetReturnValueObjectSimple(lldb_private::Thread &thread,
93                              lldb_private::CompilerType &ast_type) const;
94 
95   bool RegisterIsCalleeSaved(const lldb_private::RegisterInfo *reg_info);
96 
97 private:
98   using lldb_private::RegInfoBasedABI::RegInfoBasedABI; // Call CreateInstance instead.
99 };
100 
101 #endif // LLDB_SOURCE_PLUGINS_ABI_HEXAGON_ABISYSV_HEXAGON_H
102