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+//===-- ABIMacOSX_arm64.h ---------------------------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef liblldb_ABIMacOSX_arm64_h_
+#define liblldb_ABIMacOSX_arm64_h_
+
+// C Includes
+// C++ Includes
+// Other libraries and framework includes
+// Project includes
+#include "lldb/lldb-private.h"
+#include "lldb/Core/ConstString.h"
+#include "lldb/Target/ABI.h"
+
+class ABIMacOSX_arm64 :
+ public lldb_private::ABI
+{
+public:
+ ~ABIMacOSX_arm64() { }
+
+ virtual size_t
+ GetRedZoneSize () const;
+
+ virtual bool
+ PrepareTrivialCall (lldb_private::Thread &thread,
+ lldb::addr_t sp,
+ lldb::addr_t functionAddress,
+ lldb::addr_t returnAddress,
+ llvm::ArrayRef<lldb::addr_t> args) const;
+
+ virtual bool
+ GetArgumentValues (lldb_private::Thread &thread,
+ lldb_private::ValueList &values) const;
+
+ virtual bool
+ CreateFunctionEntryUnwindPlan (lldb_private::UnwindPlan &unwind_plan);
+
+ virtual bool
+ CreateDefaultUnwindPlan (lldb_private::UnwindPlan &unwind_plan);
+
+ virtual bool
+ RegisterIsVolatile (const lldb_private::RegisterInfo *reg_info);
+
+
+ virtual bool
+ StackUsesFrames ()
+ {
+ // MacOSX uses frame pointers.
+ return true;
+ }
+
+ // The arm64 ABI requires that stack frames be 16 byte aligned.
+ // When there is a trap handler on the stack, e.g. _sigtramp in userland
+ // code, we've seen that the stack pointer is often not aligned properly
+ // before the handler is invoked. This means that lldb will stop the unwind
+ // early -- before the function which caused the trap.
+ //
+ // To work around this, we relax that alignment to be just word-size (8-bytes).
+ // Whitelisting the trap handlers for user space would be easy (_sigtramp) but
+ // in other environments there can be a large number of different functions
+ // involved in async traps.
+
+ virtual bool
+ CallFrameAddressIsValid (lldb::addr_t cfa)
+ {
+ // Make sure the stack call frame addresses are are 8 byte aligned
+ if (cfa & (8ull - 1ull))
+ return false; // Not 8 byte aligned
+ if (cfa == 0)
+ return false; // Zero is not a valid stack address
+ return true;
+ }
+
+ virtual bool
+ CodeAddressIsValid (lldb::addr_t pc)
+ {
+ if (pc & (4ull - 1ull))
+ return false; // Not 4 byte aligned
+
+ // Anything else if fair game..
+ return true;
+ }
+
+ virtual bool
+ FunctionCallsChangeCFA ()
+ {
+ return false;
+ }
+
+ virtual const lldb_private::RegisterInfo *
+ GetRegisterInfoArray (uint32_t &count);
+
+ //------------------------------------------------------------------
+ // Static Functions
+ //------------------------------------------------------------------
+ static void
+ Initialize();
+
+ static void
+ Terminate();
+
+ static lldb::ABISP
+ CreateInstance (const lldb_private::ArchSpec &arch);
+
+ //------------------------------------------------------------------
+ // PluginInterface protocol
+ //------------------------------------------------------------------
+ static lldb_private::ConstString
+ GetPluginNameStatic();
+
+ virtual lldb_private::ConstString
+ GetPluginName()
+ {
+ return GetPluginNameStatic();
+ }
+
+ virtual const char *
+ GetShortPluginName();
+
+ virtual uint32_t
+ GetPluginVersion();
+
+ virtual lldb_private::Error
+ SetReturnValueObject(lldb::StackFrameSP &frame_sp, lldb::ValueObjectSP &new_value);
+
+protected:
+ virtual lldb::ValueObjectSP
+ GetReturnValueObjectImpl (lldb_private::Thread &thread,
+ lldb_private::ClangASTType &ast_type) const;
+
+private:
+ ABIMacOSX_arm64() :
+ lldb_private::ABI()
+ {
+ // Call CreateInstance instead.
+ }
+};
+
+#endif // liblldb_ABI_h_