| //===-- ABISysV_x86_64.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_ABISysV_x86_64_h_ |
| #define liblldb_ABISysV_x86_64_h_ |
| |
| // C Includes |
| // C++ Includes |
| // Other libraries and framework includes |
| // Project includes |
| #include "lldb/lldb-private.h" |
| #include "lldb/Target/ABI.h" |
| |
| class ABISysV_x86_64 : |
| public lldb_private::ABI |
| { |
| public: |
| |
| ~ABISysV_x86_64() |
| { |
| } |
| |
| 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 lldb_private::Error |
| SetReturnValueObject(lldb::StackFrameSP &frame_sp, lldb::ValueObjectSP &new_value); |
| |
| protected: |
| lldb::ValueObjectSP |
| GetReturnValueObjectSimple (lldb_private::Thread &thread, |
| lldb_private::ClangASTType &ast_type) const; |
| |
| public: |
| virtual lldb::ValueObjectSP |
| GetReturnValueObjectImpl (lldb_private::Thread &thread, |
| lldb_private::ClangASTType &type) 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 () |
| { |
| return true; |
| } |
| |
| // The SysV x86_64 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 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) |
| { |
| // We have a 64 bit address space, so anything is valid as opcodes |
| // aren't fixed width... |
| return true; |
| } |
| |
| virtual bool |
| FunctionCallsChangeCFA () |
| { |
| return true; |
| } |
| |
| 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); |
| |
| static lldb_private::ConstString |
| GetPluginNameStatic(); |
| |
| //------------------------------------------------------------------ |
| // PluginInterface protocol |
| //------------------------------------------------------------------ |
| virtual lldb_private::ConstString |
| GetPluginName(); |
| |
| virtual uint32_t |
| GetPluginVersion(); |
| |
| protected: |
| void |
| CreateRegisterMapIfNeeded (); |
| |
| bool |
| RegisterIsCalleeSaved (const lldb_private::RegisterInfo *reg_info); |
| |
| private: |
| ABISysV_x86_64() : lldb_private::ABI() { } // Call CreateInstance instead. |
| }; |
| |
| #endif // liblldb_ABI_h_ |