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);
54 // MacOSX uses frame pointers.
58 // The arm64 ABI requires that stack frames be 16 byte aligned.
59 // When there is a trap handler on the stack, e.g. _sigtramp in userland
60 // code, we've seen that the stack pointer is often not aligned properly
61 // before the handler is invoked. This means that lldb will stop the unwind
62 // early -- before the function which caused the trap.
64 // To work around this, we relax that alignment to be just word-size (8-bytes).
65 // Whitelisting the trap handlers for user space would be easy (_sigtramp) but
66 // in other environments there can be a large number of different functions
67 // involved in async traps.
70 CallFrameAddressIsValid (lldb::addr_t cfa)
72 // Make sure the stack call frame addresses are are 8 byte aligned
73 if (cfa & (8ull - 1ull))
74 return false; // Not 8 byte aligned
76 return false; // Zero is not a valid stack address
81 CodeAddressIsValid (lldb::addr_t pc)
83 if (pc & (4ull - 1ull))
84 return false; // Not 4 byte aligned
86 // Anything else if fair game..
91 FunctionCallsChangeCFA ()
96 virtual const lldb_private::RegisterInfo *
97 GetRegisterInfoArray (uint32_t &count);
99 //------------------------------------------------------------------
101 //------------------------------------------------------------------
109 CreateInstance (const lldb_private::ArchSpec &arch);
111 //------------------------------------------------------------------
112 // PluginInterface protocol
113 //------------------------------------------------------------------
114 static lldb_private::ConstString
115 GetPluginNameStatic();
117 virtual lldb_private::ConstString
120 return GetPluginNameStatic();
124 GetShortPluginName();
129 virtual lldb_private::Error
130 SetReturnValueObject(lldb::StackFrameSP &frame_sp, lldb::ValueObjectSP &new_value);
133 virtual lldb::ValueObjectSP
134 GetReturnValueObjectImpl (lldb_private::Thread &thread,
135 lldb_private::ClangASTType &ast_type) const;
141 // Call CreateInstance instead.
145 #endif // liblldb_ABI_h_