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Diffstat (limited to 'source/Plugins/ABI/MacOSX-arm64/ABIMacOSX_arm64.h')
-rw-r--r-- | source/Plugins/ABI/MacOSX-arm64/ABIMacOSX_arm64.h | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/source/Plugins/ABI/MacOSX-arm64/ABIMacOSX_arm64.h b/source/Plugins/ABI/MacOSX-arm64/ABIMacOSX_arm64.h new file mode 100644 index 000000000000..0753b23ce2a2 --- /dev/null +++ b/source/Plugins/ABI/MacOSX-arm64/ABIMacOSX_arm64.h @@ -0,0 +1,145 @@ +//===-- 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_ |