forked from OSchip/llvm-project
142 lines
3.8 KiB
C++
142 lines
3.8 KiB
C++
//===-- Opcode.cpp ----------------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Core/Opcode.h"
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#include "lldb/Utility/DataBufferHeap.h"
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#include "lldb/Utility/DataExtractor.h"
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#include "lldb/Utility/Endian.h"
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#include "lldb/Utility/Stream.h"
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#include "lldb/lldb-forward.h" // for DataBufferSP
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#include <memory> // for make_shared
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#include <inttypes.h> // for PRIx64
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using namespace lldb;
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using namespace lldb_private;
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int Opcode::Dump(Stream *s, uint32_t min_byte_width) {
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const uint32_t previous_bytes = s->GetWrittenBytes();
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switch (m_type) {
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case Opcode::eTypeInvalid:
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s->PutCString("<invalid>");
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break;
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case Opcode::eType8:
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s->Printf("0x%2.2x", m_data.inst8);
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break;
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case Opcode::eType16:
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s->Printf("0x%4.4x", m_data.inst16);
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break;
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case Opcode::eType16_2:
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case Opcode::eType32:
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s->Printf("0x%8.8x", m_data.inst32);
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break;
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case Opcode::eType64:
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s->Printf("0x%16.16" PRIx64, m_data.inst64);
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break;
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case Opcode::eTypeBytes:
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for (uint32_t i = 0; i < m_data.inst.length; ++i) {
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if (i > 0)
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s->PutChar(' ');
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s->Printf("%2.2x", m_data.inst.bytes[i]);
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}
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break;
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}
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uint32_t bytes_written_so_far = s->GetWrittenBytes() - previous_bytes;
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// Add spaces to make sure bytes display comes out even in case opcodes aren't
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// all the same size.
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if (bytes_written_so_far < min_byte_width)
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s->Printf("%*s", min_byte_width - bytes_written_so_far, "");
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return s->GetWrittenBytes() - previous_bytes;
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}
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lldb::ByteOrder Opcode::GetDataByteOrder() const {
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if (m_byte_order != eByteOrderInvalid) {
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return m_byte_order;
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}
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switch (m_type) {
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case Opcode::eTypeInvalid:
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break;
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case Opcode::eType8:
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case Opcode::eType16:
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case Opcode::eType16_2:
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case Opcode::eType32:
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case Opcode::eType64:
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return endian::InlHostByteOrder();
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case Opcode::eTypeBytes:
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break;
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}
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return eByteOrderInvalid;
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}
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uint32_t Opcode::GetData(DataExtractor &data) const {
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uint32_t byte_size = GetByteSize();
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uint8_t swap_buf[8];
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const void *buf = nullptr;
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if (byte_size > 0) {
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if (!GetEndianSwap()) {
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if (m_type == Opcode::eType16_2) {
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// 32 bit thumb instruction, we need to sizzle this a bit
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swap_buf[0] = m_data.inst.bytes[2];
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swap_buf[1] = m_data.inst.bytes[3];
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swap_buf[2] = m_data.inst.bytes[0];
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swap_buf[3] = m_data.inst.bytes[1];
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buf = swap_buf;
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} else {
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buf = GetOpcodeDataBytes();
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}
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} else {
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switch (m_type) {
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case Opcode::eTypeInvalid:
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break;
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case Opcode::eType8:
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buf = GetOpcodeDataBytes();
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break;
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case Opcode::eType16:
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*(uint16_t *)swap_buf = llvm::ByteSwap_16(m_data.inst16);
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buf = swap_buf;
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break;
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case Opcode::eType16_2:
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swap_buf[0] = m_data.inst.bytes[1];
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swap_buf[1] = m_data.inst.bytes[0];
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swap_buf[2] = m_data.inst.bytes[3];
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swap_buf[3] = m_data.inst.bytes[2];
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buf = swap_buf;
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break;
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case Opcode::eType32:
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*(uint32_t *)swap_buf = llvm::ByteSwap_32(m_data.inst32);
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buf = swap_buf;
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break;
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case Opcode::eType64:
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*(uint32_t *)swap_buf = llvm::ByteSwap_64(m_data.inst64);
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buf = swap_buf;
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break;
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case Opcode::eTypeBytes:
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buf = GetOpcodeDataBytes();
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break;
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}
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}
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}
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if (buf != nullptr) {
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DataBufferSP buffer_sp;
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buffer_sp = std::make_shared<DataBufferHeap>(buf, byte_size);
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data.SetByteOrder(GetDataByteOrder());
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data.SetData(buffer_sp);
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return byte_size;
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}
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data.Clear();
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return 0;
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}
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