1//===-- ABISysV_arm.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_ARM_ABISYSV_ARM_H
10#define LLDB_SOURCE_PLUGINS_ABI_ARM_ABISYSV_ARM_H
11
12#include "lldb/Target/ABI.h"
13#include "lldb/lldb-private.h"
14
15class ABISysV_arm : public lldb_private::RegInfoBasedABI {
16public:
17 ~ABISysV_arm() 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 func_addr, lldb::addr_t returnAddress,
23 llvm::ArrayRef<lldb::addr_t> args) const override;
24
25 bool GetArgumentValues(lldb_private::Thread &thread,
26 lldb_private::ValueList &values) const override;
27
28 lldb_private::Status
29 SetReturnValueObject(lldb::StackFrameSP &frame_sp,
30 lldb::ValueObjectSP &new_value) override;
31
32 bool
33 CreateFunctionEntryUnwindPlan(lldb_private::UnwindPlan &unwind_plan) override;
34
35 bool CreateDefaultUnwindPlan(lldb_private::UnwindPlan &unwind_plan) override;
36
37 bool RegisterIsVolatile(const lldb_private::RegisterInfo *reg_info) override;
38
39 bool CallFrameAddressIsValid(lldb::addr_t cfa) override {
40 // Make sure the stack call frame addresses are 4 byte aligned
41 if (cfa & (4ull - 1ull))
42 return false; // Not 4 byte aligned
43 if (cfa == 0)
44 return false; // Zero is not a valid stack address
45 return true;
46 }
47
48 bool CodeAddressIsValid(lldb::addr_t pc) override {
49 // Just make sure the address is a valid 32 bit address. Bit zero
50 // might be set due to Thumb function calls, so don't enforce 2 byte
51 // alignment
52 return pc <= UINT32_MAX;
53 }
54
55 lldb::addr_t FixCodeAddress(lldb::addr_t pc) override {
56 // ARM uses bit zero to signify a code address is thumb, so we must
57 // strip bit zero in any code addresses.
58 return pc & ~(lldb::addr_t)1;
59 }
60
61 const lldb_private::RegisterInfo *
62 GetRegisterInfoArray(uint32_t &count) override;
63
64 bool IsArmHardFloat(lldb_private::Thread &thread) const;
65
66 // Static Functions
67
68 static void Initialize();
69
70 static void Terminate();
71
72 static lldb::ABISP CreateInstance(lldb::ProcessSP process_sp, const lldb_private::ArchSpec &arch);
73
74 static llvm::StringRef GetPluginNameStatic() { return "SysV-arm"; }
75
76 // PluginInterface protocol
77
78 llvm::StringRef GetPluginName() override { return GetPluginNameStatic(); }
79
80protected:
81 lldb::ValueObjectSP
82 GetReturnValueObjectImpl(lldb_private::Thread &thread,
83 lldb_private::CompilerType &ast_type) const override;
84
85private:
86 using lldb_private::RegInfoBasedABI::RegInfoBasedABI; // Call CreateInstance instead.
87};
88
89#endif // LLDB_SOURCE_PLUGINS_ABI_ARM_ABISYSV_ARM_H
90

source code of lldb/source/Plugins/ABI/ARM/ABISysV_arm.h