lldb/source/Plugins/ABI/ARM/ABISysV_arm.h

   1 //===-- ABISysV_arm.h ----------------------------------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #ifndef LLDB_SOURCE_PLUGINS_ABI_ARM_ABISYSV_ARM_H
  10 #define LLDB_SOURCE_PLUGINS_ABI_ARM_ABISYSV_ARM_H
  11
  12 #include "lldb/Target/ABI.h"
  13 #include "lldb/lldb-private.h"
  14
  15 class ABISysV_arm : public lldb_private::RegInfoBasedABI {
  16 public:
  17   ~ABISysV_arm() override = default;
  18
  19   size_t GetRedZoneSize() const override;
  20
  21   bool PrepareTrivialCall(lldb_private::Thread &thread, lldb::addr_t sp,
  22                           lldb::addr_t func_addr, lldb::addr_t returnAddress,
  23                           llvm::ArrayRef<lldb::addr_t> args) const override;
  24
  25   bool GetArgumentValues(lldb_private::Thread &thread,
  26                          lldb_private::ValueList &values) const override;
  27
  28   lldb_private::Status
  29   SetReturnValueObject(lldb::StackFrameSP &frame_sp,
  30                        lldb::ValueObjectSP &new_value) override;
  31
  32   bool
  33   CreateFunctionEntryUnwindPlan(lldb_private::UnwindPlan &unwind_plan) override;
  34
  35   bool CreateDefaultUnwindPlan(lldb_private::UnwindPlan &unwind_plan) override;
  36
  37   bool RegisterIsVolatile(const lldb_private::RegisterInfo *reg_info) override;
  38
  39   bool CallFrameAddressIsValid(lldb::addr_t cfa) override {
  40     // Make sure the stack call frame addresses are 4 byte aligned
  41     if (cfa & (4ull - 1ull))
  42       return false; // Not 4 byte aligned
  43     if (cfa == 0)
  44       return false; // Zero is not a valid stack address
  45     return true;
  46   }
  47
  48   bool CodeAddressIsValid(lldb::addr_t pc) override {
  49     // Just make sure the address is a valid 32 bit address. Bit zero
  50     // might be set due to Thumb function calls, so don't enforce 2 byte
  51     // alignment
  52     return pc <= UINT32_MAX;
  53   }
  54
  55   lldb::addr_t FixCodeAddress(lldb::addr_t pc) override {
  56     // ARM uses bit zero to signify a code address is thumb, so we must
  57     // strip bit zero in any code addresses.
  58     return pc & ~(lldb::addr_t)1;
  59   }
  60
  61   const lldb_private::RegisterInfo *
  62   GetRegisterInfoArray(uint32_t &count) override;
  63
  64   bool IsArmHardFloat(lldb_private::Thread &thread) const;
  65
  66   // Static Functions
  67
  68   static void Initialize();
  69
  70   static void Terminate();
  71
  72   static lldb::ABISP CreateInstance(lldb::ProcessSP process_sp, const lldb_private::ArchSpec &arch);
  73
  74   static llvm::StringRef GetPluginNameStatic() { return "SysV-arm"; }
  75
  76   // PluginInterface protocol
  77
  78   llvm::StringRef GetPluginName() override { return GetPluginNameStatic(); }
  79
  80 protected:
  81   lldb::ValueObjectSP
  82   GetReturnValueObjectImpl(lldb_private::Thread &thread,
  83                            lldb_private::CompilerType &ast_type) const override;
  84
  85 private:
  86   using lldb_private::RegInfoBasedABI::RegInfoBasedABI; // Call CreateInstance instead.
  87 };
  88
  89 #endif // LLDB_SOURCE_PLUGINS_ABI_ARM_ABISYSV_ARM_H