1 //===-- ABIMacOSX_arm64.h ---------------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #ifndef liblldb_ABIMacOSX_arm64_h_
11 #define liblldb_ABIMacOSX_arm64_h_
15 // Other libraries and framework includes
17 #include "lldb/lldb-private.h"
18 #include "lldb/Core/ConstString.h"
19 #include "lldb/Target/ABI.h"
21 class ABIMacOSX_arm64 :
22 public lldb_private::ABI
25 ~ABIMacOSX_arm64() { }
28 GetRedZoneSize () const;
31 PrepareTrivialCall (lldb_private::Thread &thread,
33 lldb::addr_t functionAddress,
34 lldb::addr_t returnAddress,
35 llvm::ArrayRef<lldb::addr_t> args) const;
38 GetArgumentValues (lldb_private::Thread &thread,
39 lldb_private::ValueList &values) const;
42 CreateFunctionEntryUnwindPlan (lldb_private::UnwindPlan &unwind_plan);
45 CreateDefaultUnwindPlan (lldb_private::UnwindPlan &unwind_plan);
48 RegisterIsVolatile (const lldb_private::RegisterInfo *reg_info);
50 // The arm64 ABI requires that stack frames be 16 byte aligned.
51 // When there is a trap handler on the stack, e.g. _sigtramp in userland
52 // code, we've seen that the stack pointer is often not aligned properly
53 // before the handler is invoked. This means that lldb will stop the unwind
54 // early -- before the function which caused the trap.
56 // To work around this, we relax that alignment to be just word-size (8-bytes).
57 // Whitelisting the trap handlers for user space would be easy (_sigtramp) but
58 // in other environments there can be a large number of different functions
59 // involved in async traps.
62 CallFrameAddressIsValid (lldb::addr_t cfa)
64 // Make sure the stack call frame addresses are are 8 byte aligned
65 if (cfa & (8ull - 1ull))
66 return false; // Not 8 byte aligned
68 return false; // Zero is not a valid stack address
73 CodeAddressIsValid (lldb::addr_t pc)
75 if (pc & (4ull - 1ull))
76 return false; // Not 4 byte aligned
78 // Anything else if fair game..
82 virtual const lldb_private::RegisterInfo *
83 GetRegisterInfoArray (uint32_t &count);
85 //------------------------------------------------------------------
87 //------------------------------------------------------------------
95 CreateInstance (const lldb_private::ArchSpec &arch);
97 //------------------------------------------------------------------
98 // PluginInterface protocol
99 //------------------------------------------------------------------
100 static lldb_private::ConstString
101 GetPluginNameStatic();
103 virtual lldb_private::ConstString
106 return GetPluginNameStatic();
110 GetShortPluginName();
115 virtual lldb_private::Error
116 SetReturnValueObject(lldb::StackFrameSP &frame_sp, lldb::ValueObjectSP &new_value);
119 virtual lldb::ValueObjectSP
120 GetReturnValueObjectImpl (lldb_private::Thread &thread,
121 lldb_private::ClangASTType &ast_type) const;
127 // Call CreateInstance instead.
131 #endif // liblldb_ABI_h_