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llvm-project/lldb/source/Commands/CommandObjectDisassemble.cpp

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//===-- CommandObjectDisassemble.cpp ----------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "CommandObjectDisassemble.h"
// C Includes
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "lldb/Core/AddressRange.h"
#include "lldb/Interpreter/Args.h"
#include "lldb/Interpreter/CommandCompletions.h"
#include "lldb/Interpreter/CommandInterpreter.h"
#include "lldb/Interpreter/CommandReturnObject.h"
#include "lldb/Core/Disassembler.h"
#include "lldb/Interpreter/Options.h"
#include "lldb/Core/SourceManager.h"
#include "lldb/Target/StackFrame.h"
#include "lldb/Symbol/Symbol.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/Target.h"
#define DEFAULT_DISASM_BYTE_SIZE 32
using namespace lldb;
using namespace lldb_private;
CommandObjectDisassemble::CommandOptions::CommandOptions () :
Options(),
m_func_name(),
m_start_addr(),
m_end_addr ()
{
ResetOptionValues();
}
CommandObjectDisassemble::CommandOptions::~CommandOptions ()
{
}
Error
CommandObjectDisassemble::CommandOptions::SetOptionValue (int option_idx, const char *option_arg)
{
Error error;
char short_option = (char) m_getopt_table[option_idx].val;
switch (short_option)
{
case 'm':
show_mixed = true;
break;
case 'c':
num_lines_context = Args::StringToUInt32(option_arg, 0, 0);
break;
case 'b':
show_bytes = true;
break;
case 's':
m_start_addr = Args::StringToUInt64(optarg, LLDB_INVALID_ADDRESS, 0);
if (m_start_addr == LLDB_INVALID_ADDRESS)
m_start_addr = Args::StringToUInt64(optarg, LLDB_INVALID_ADDRESS, 16);
if (m_start_addr == LLDB_INVALID_ADDRESS)
error.SetErrorStringWithFormat ("Invalid start address string '%s'.\n", optarg);
break;
case 'e':
m_end_addr = Args::StringToUInt64(optarg, LLDB_INVALID_ADDRESS, 0);
if (m_end_addr == LLDB_INVALID_ADDRESS)
m_end_addr = Args::StringToUInt64(optarg, LLDB_INVALID_ADDRESS, 16);
if (m_end_addr == LLDB_INVALID_ADDRESS)
error.SetErrorStringWithFormat ("Invalid end address string '%s'.\n", optarg);
break;
case 'n':
m_func_name = option_arg;
break;
case 'r':
raw = true;
break;
case 'f':
// The default action is to disassemble the function for the current frame.
// There's no need to set any flag.
break;
default:
error.SetErrorStringWithFormat("Unrecognized short option '%c'.\n", short_option);
break;
}
return error;
}
void
CommandObjectDisassemble::CommandOptions::ResetOptionValues ()
{
Options::ResetOptionValues();
show_mixed = false;
show_bytes = false;
num_lines_context = 0;
m_func_name.clear();
m_start_addr = LLDB_INVALID_ADDRESS;
m_end_addr = LLDB_INVALID_ADDRESS;
raw = false;
}
const lldb::OptionDefinition*
CommandObjectDisassemble::CommandOptions::GetDefinitions ()
{
return g_option_table;
}
lldb::OptionDefinition
CommandObjectDisassemble::CommandOptions::g_option_table[] =
{
{ LLDB_OPT_SET_ALL, false, "bytes", 'b', no_argument, NULL, 0, eArgTypeNone, "Show opcode bytes when disassembling."},
{ LLDB_OPT_SET_ALL, false, "context", 'c', required_argument, NULL, 0, eArgTypeNumLines, "Number of context lines of source to show."},
{ LLDB_OPT_SET_ALL, false, "mixed", 'm', no_argument, NULL, 0, eArgTypeNone, "Enable mixed source and assembly display."},
{ LLDB_OPT_SET_ALL, false, "raw", 'r', no_argument, NULL, 0, eArgTypeNone, "Print raw disassembly with no symbol information."},
{ LLDB_OPT_SET_1, true, "start-address", 's', required_argument, NULL, 0, eArgTypeStartAddress, "Address at which to start disassembling."},
{ LLDB_OPT_SET_1, false, "end-address", 'e', required_argument, NULL, 0, eArgTypeEndAddress, "Address at which to end disassembling."},
{ LLDB_OPT_SET_2, true, "name", 'n', required_argument, NULL, CommandCompletions::eSymbolCompletion, eArgTypeFunctionName, "Disassemble entire contents of the given function name."},
{ LLDB_OPT_SET_3, true, "current-frame", 'f', no_argument, NULL, 0, eArgTypeNone, "Disassemble entire contents of the current frame's function."},
{ 0, false, NULL, 0, 0, NULL, 0, eArgTypeNone, NULL }
};
//-------------------------------------------------------------------------
// CommandObjectDisassemble
//-------------------------------------------------------------------------
CommandObjectDisassemble::CommandObjectDisassemble (CommandInterpreter &interpreter) :
CommandObject (interpreter,
"disassemble",
"Disassemble bytes in the current function, or elsewhere in the executable program as specified by the user.",
"disassemble [<cmd-options>]")
{
}
CommandObjectDisassemble::~CommandObjectDisassemble()
{
}
bool
CommandObjectDisassemble::Execute
(
Args& command,
CommandReturnObject &result
)
{
Target *target = m_interpreter.GetDebugger().GetSelectedTarget().get();
if (target == NULL)
{
result.AppendError ("invalid target, set executable file using 'file' command");
result.SetStatus (eReturnStatusFailed);
return false;
}
ArchSpec arch(target->GetArchitecture());
if (!arch.IsValid())
{
result.AppendError ("target needs valid architecure in order to be able to disassemble");
result.SetStatus (eReturnStatusFailed);
return false;
}
Disassembler *disassembler = Disassembler::FindPlugin(arch);
if (disassembler == NULL)
{
result.AppendErrorWithFormat ("Unable to find Disassembler plug-in for %s architecture.\n", arch.AsCString());
result.SetStatus (eReturnStatusFailed);
return false;
}
result.SetStatus (eReturnStatusSuccessFinishResult);
if (command.GetArgumentCount() != 0)
{
result.AppendErrorWithFormat ("\"disassemble\" arguments are specified as options.\n");
GetOptions()->GenerateOptionUsage (m_interpreter,
result.GetErrorStream(),
this);
result.SetStatus (eReturnStatusFailed);
return false;
}
ExecutionContext exe_ctx(m_interpreter.GetDebugger().GetExecutionContext());
if (m_options.show_mixed && m_options.num_lines_context == 0)
m_options.num_lines_context = 1;
if (!m_options.m_func_name.empty())
{
ConstString name(m_options.m_func_name.c_str());
if (Disassembler::Disassemble (m_interpreter.GetDebugger(),
arch,
exe_ctx,
name,
NULL, // Module *
m_options.show_mixed ? m_options.num_lines_context : 0,
m_options.show_bytes,
result.GetOutputStream()))
{
result.SetStatus (eReturnStatusSuccessFinishResult);
}
else
{
result.AppendErrorWithFormat ("Unable to find symbol with name '%s'.\n", name.GetCString());
result.SetStatus (eReturnStatusFailed);
}
}
else
{
AddressRange range;
if (m_options.m_start_addr != LLDB_INVALID_ADDRESS)
{
range.GetBaseAddress().SetOffset (m_options.m_start_addr);
if (m_options.m_end_addr != LLDB_INVALID_ADDRESS)
{
if (m_options.m_end_addr < m_options.m_start_addr)
{
result.AppendErrorWithFormat ("End address before start address.\n");
result.SetStatus (eReturnStatusFailed);
return false;
}
range.SetByteSize (m_options.m_end_addr - m_options.m_start_addr);
}
else
range.SetByteSize (DEFAULT_DISASM_BYTE_SIZE);
}
else
{
// The default action is to disassemble the current frame function.
if (exe_ctx.frame)
{
SymbolContext sc(exe_ctx.frame->GetSymbolContext(eSymbolContextFunction | eSymbolContextSymbol));
if (sc.function)
range = sc.function->GetAddressRange();
else if (sc.symbol && sc.symbol->GetAddressRangePtr())
range = *sc.symbol->GetAddressRangePtr();
else
range.GetBaseAddress() = exe_ctx.frame->GetFrameCodeAddress();
}
else
{
result.AppendError ("invalid frame");
result.SetStatus (eReturnStatusFailed);
return false;
}
}
if (range.GetByteSize() == 0)
range.SetByteSize(DEFAULT_DISASM_BYTE_SIZE);
if (Disassembler::Disassemble (m_interpreter.GetDebugger(),
arch,
exe_ctx,
range,
m_options.show_mixed ? m_options.num_lines_context : 0,
m_options.show_bytes,
result.GetOutputStream()))
{
result.SetStatus (eReturnStatusSuccessFinishResult);
}
else
{
result.AppendErrorWithFormat ("Failed to disassemble memory at 0x%8.8llx.\n", m_options.m_start_addr);
result.SetStatus (eReturnStatusFailed);
}
}
return result.Succeeded();
}
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