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usr / src / contrib / llvm-project / lldb / source / Plugins / ABI / PowerPC /

📁 ..
📄 ABIPowerPC.cpp(702 B)
📄 ABIPowerPC.h(569 B)
📄 ABISysV_ppc.cpp(33.77 KB)
📄 ABISysV_ppc.h(3.54 KB)
📄 ABISysV_ppc64.cpp(33.54 KB)
📄 ABISysV_ppc64.h(3.59 KB)

Editing: ABISysV_ppc.h

//===-- ABISysV_ppc.h ----------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef LLDB_SOURCE_PLUGINS_ABI_POWERPC_ABISYSV_PPC_H
#define LLDB_SOURCE_PLUGINS_ABI_POWERPC_ABISYSV_PPC_H

#include "lldb/Target/ABI.h"
#include "lldb/lldb-private.h"

class ABISysV_ppc : public lldb_private::RegInfoBasedABI {
public:
  ~ABISysV_ppc() override = default;

size_t GetRedZoneSize() const override;

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 override;

bool GetArgumentValues(lldb_private::Thread &thread,
                         lldb_private::ValueList &values) const override;

lldb_private::Status
  SetReturnValueObject(lldb::StackFrameSP &frame_sp,
                       lldb::ValueObjectSP &new_value) override;

lldb::ValueObjectSP
  GetReturnValueObjectImpl(lldb_private::Thread &thread,
                           lldb_private::CompilerType &type) const override;

bool
  CreateFunctionEntryUnwindPlan(lldb_private::UnwindPlan &unwind_plan) override;

bool CreateDefaultUnwindPlan(lldb_private::UnwindPlan &unwind_plan) override;

bool RegisterIsVolatile(const lldb_private::RegisterInfo *reg_info) override;

// The SysV ppc 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).
  // Allowing 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.
  bool CallFrameAddressIsValid(lldb::addr_t cfa) override {
    // 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;
  }

bool CodeAddressIsValid(lldb::addr_t pc) override {
    // We have a 64 bit address space, so anything is valid as opcodes
    // aren't fixed width...
    return true;
  }

const lldb_private::RegisterInfo *
  GetRegisterInfoArray(uint32_t &count) override;

// Static Functions

static void Initialize();

static void Terminate();

static lldb::ABISP CreateInstance(lldb::ProcessSP process_sp, const lldb_private::ArchSpec &arch);

static lldb_private::ConstString GetPluginNameStatic();

// PluginInterface protocol

lldb_private::ConstString GetPluginName() override;

uint32_t GetPluginVersion() override;

protected:
  void CreateRegisterMapIfNeeded();

lldb::ValueObjectSP
  GetReturnValueObjectSimple(lldb_private::Thread &thread,
                             lldb_private::CompilerType &ast_type) const;

bool RegisterIsCalleeSaved(const lldb_private::RegisterInfo *reg_info);

private:
  using lldb_private::RegInfoBasedABI::RegInfoBasedABI; // Call CreateInstance instead.
};

#endif // LLDB_SOURCE_PLUGINS_ABI_POWERPC_ABISYSV_PPC_H

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Editing: ABISysV_ppc.h

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