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//===-- Opcode.cpp --------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "lldb/Core/Opcode.h"
#include "lldb/Utility/DataBufferHeap.h"
#include "lldb/Utility/DataExtractor.h"
#include "lldb/Utility/Endian.h"
#include "lldb/Utility/Stream.h"
#include "lldb/lldb-forward.h"
#include <memory>
#include <cinttypes>
using namespace lldb;
using namespace lldb_private;
int Opcode::Dump(Stream *s, uint32_t min_byte_width) const {
const uint32_t previous_bytes = s->GetWrittenBytes();
switch (m_type) {
case Opcode::eTypeInvalid:
s->PutCString("<invalid>");
break;
case Opcode::eType8:
s->Printf("0x%2.2x", m_data.inst8);
break;
case Opcode::eType16:
s->Printf("0x%4.4x", m_data.inst16);
break;
case Opcode::eType16_2:
case Opcode::eType32:
s->Printf("0x%8.8x", m_data.inst32);
break;
case Opcode::eType16_32Tuples: {
const bool format_as_words = (m_data.inst.length % 4) == 0;
uint32_t i = 0;
while (i < m_data.inst.length) {
if (i > 0)
s->PutChar(' ');
if (format_as_words) {
// Format as words; print 1 or more UInt32 values.
s->Printf("%2.2x%2.2x%2.2x%2.2x", m_data.inst.bytes[i + 3],
m_data.inst.bytes[i + 2], m_data.inst.bytes[i + 1],
m_data.inst.bytes[i + 0]);
i += 4;
} else {
// Format as halfwords; print 1 or more UInt16 values.
s->Printf("%2.2x%2.2x", m_data.inst.bytes[i + 1],
m_data.inst.bytes[i + 0]);
i += 2;
}
}
} break;
case Opcode::eType64:
s->Printf("0x%16.16" PRIx64, m_data.inst64);
break;
case Opcode::eTypeBytes:
for (uint32_t i = 0; i < m_data.inst.length; ++i) {
if (i > 0)
s->PutChar(' ');
s->Printf("%2.2x", m_data.inst.bytes[i]);
}
break;
}
uint32_t bytes_written_so_far = s->GetWrittenBytes() - previous_bytes;
// Add spaces to make sure bytes display comes out even in case opcodes aren't
// all the same size.
if (bytes_written_so_far < min_byte_width)
s->Printf("%*s", min_byte_width - bytes_written_so_far, "");
return s->GetWrittenBytes() - previous_bytes;
}
lldb::ByteOrder Opcode::GetDataByteOrder() const {
if (m_byte_order != eByteOrderInvalid) {
return m_byte_order;
}
switch (m_type) {
case Opcode::eTypeInvalid:
break;
case Opcode::eType8:
case Opcode::eType16:
case Opcode::eType16_2:
case Opcode::eType16_32Tuples:
case Opcode::eType32:
case Opcode::eType64:
return endian::InlHostByteOrder();
case Opcode::eTypeBytes:
break;
}
return eByteOrderInvalid;
}
uint32_t Opcode::GetData(DataExtractor &data) const {
uint32_t byte_size = GetByteSize();
uint8_t swap_buf[8];
const void *buf = nullptr;
if (byte_size > 0) {
if (!GetEndianSwap()) {
if (m_type == Opcode::eType16_2) {
// 32 bit thumb instruction, we need to sizzle this a bit
swap_buf[0] = m_data.inst.bytes[2];
swap_buf[1] = m_data.inst.bytes[3];
swap_buf[2] = m_data.inst.bytes[0];
swap_buf[3] = m_data.inst.bytes[1];
buf = swap_buf;
} else {
buf = GetOpcodeDataBytes();
}
} else {
switch (m_type) {
case Opcode::eTypeInvalid:
break;
case Opcode::eType8:
buf = GetOpcodeDataBytes();
break;
case Opcode::eType16:
*(uint16_t *)swap_buf = llvm::byteswap<uint16_t>(m_data.inst16);
buf = swap_buf;
break;
case Opcode::eType16_2:
swap_buf[0] = m_data.inst.bytes[1];
swap_buf[1] = m_data.inst.bytes[0];
swap_buf[2] = m_data.inst.bytes[3];
swap_buf[3] = m_data.inst.bytes[2];
buf = swap_buf;
break;
case Opcode::eType16_32Tuples:
buf = GetOpcodeDataBytes();
break;
case Opcode::eType32:
*(uint32_t *)swap_buf = llvm::byteswap<uint32_t>(m_data.inst32);
buf = swap_buf;
break;
case Opcode::eType64:
*(uint32_t *)swap_buf = llvm::byteswap<uint64_t>(m_data.inst64);
buf = swap_buf;
break;
case Opcode::eTypeBytes:
buf = GetOpcodeDataBytes();
break;
}
}
}
if (buf != nullptr) {
DataBufferSP buffer_sp;
buffer_sp = std::make_shared<DataBufferHeap>(buf, byte_size);
data.SetByteOrder(GetDataByteOrder());
data.SetData(buffer_sp);
return byte_size;
}
data.Clear();
return 0;
}
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