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//===-- EmulateInstruction.h ------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lldb/Core/EmulateInstruction.h"
#include "lldb/Core/DataExtractor.h"
#include "lldb/Core/PluginManager.h"
#include "lldb/Core/StreamString.h"
#include "lldb/Host/Endian.h"
using namespace lldb;
using namespace lldb_private;
EmulateInstruction*
EmulateInstruction::FindPlugin (const ArchSpec &arch, const char *plugin_name)
{
EmulateInstructionCreateInstance create_callback = NULL;
if (plugin_name)
{
create_callback = PluginManager::GetEmulateInstructionCreateCallbackForPluginName (plugin_name);
if (create_callback)
{
std::auto_ptr<EmulateInstruction> instance_ap(create_callback(arch));
if (instance_ap.get())
return instance_ap.release();
}
}
else
{
for (uint32_t idx = 0; (create_callback = PluginManager::GetEmulateInstructionCreateCallbackAtIndex(idx)) != NULL; ++idx)
{
std::auto_ptr<EmulateInstruction> instance_ap(create_callback(arch));
if (instance_ap.get())
return instance_ap.release();
}
}
return NULL;
}
EmulateInstruction::EmulateInstruction
(
lldb::ByteOrder byte_order,
uint32_t addr_byte_size,
void *baton,
ReadMemory read_mem_callback,
WriteMemory write_mem_callback,
ReadRegister read_reg_callback,
WriteRegister write_reg_callback
) :
m_byte_order (endian::InlHostByteOrder()),
m_addr_byte_size (sizeof (void *)),
m_baton (baton),
m_read_mem_callback (read_mem_callback),
m_write_mem_callback (write_mem_callback),
m_read_reg_callback (read_reg_callback),
m_write_reg_callback (write_reg_callback),
m_inst_pc (LLDB_INVALID_ADDRESS)
{
::memset (&m_inst, 0, sizeof (m_inst));
}
uint64_t
EmulateInstruction::ReadRegisterUnsigned (uint32_t reg_kind, uint32_t reg_num, uint64_t fail_value, bool *success_ptr)
{
uint64_t uval64 = 0;
bool success = m_read_reg_callback (m_baton, reg_kind, reg_num, uval64);
if (success_ptr)
*success_ptr = success;
if (!success)
uval64 = fail_value;
return uval64;
}
bool
EmulateInstruction::WriteRegisterUnsigned (const Context &context, uint32_t reg_kind, uint32_t reg_num, uint64_t reg_value)
{
return m_write_reg_callback (m_baton, context, reg_kind, reg_num, reg_value);
}
uint64_t
EmulateInstruction::ReadMemoryUnsigned (const Context &context, lldb::addr_t addr, size_t byte_size, uint64_t fail_value, bool *success_ptr)
{
uint64_t uval64 = 0;
bool success = false;
if (byte_size <= 8)
{
uint8_t buf[sizeof(uint64_t)];
size_t bytes_read = m_read_mem_callback (m_baton, context, addr, buf, byte_size);
if (bytes_read == byte_size)
{
uint32_t offset = 0;
DataExtractor data (buf, byte_size, m_byte_order, m_addr_byte_size);
uval64 = data.GetMaxU64 (&offset, byte_size);
success = true;
}
}
if (success_ptr)
*success_ptr = success;
if (!success)
uval64 = fail_value;
return uval64;
}
bool
EmulateInstruction::WriteMemoryUnsigned (const Context &context,
lldb::addr_t addr,
uint64_t uval,
size_t uval_byte_size)
{
StreamString strm(Stream::eBinary, GetAddressByteSize(), GetByteOrder());
strm.PutMaxHex64 (uval, uval_byte_size);
size_t bytes_written = m_write_mem_callback (m_baton, context, addr, strm.GetData(), uval_byte_size);
if (bytes_written == uval_byte_size)
return true;
return false;
}
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