edb-debugger-mcp 1.0.2

MCP server providing full EDB (Evan's Debugger) functionality via a GDB MI backend

EDB Debugger MCP

An MCP (Model Context Protocol) server that provides full EDB (Evan's Debugger) functionality via a GDB MI (Machine Interface) backend. Built with Python and FastMCP, this server exposes 147 debugging tools (83 Pydantic models, 123 backend methods, ~6100 LOC) that can be used by any MCP-enabled AI assistant or IDE (Claude Desktop, Cursor, etc.).

EDB feature coverage: 22/22 plugins, 29/29 actions, 13/13 dialogs, 6/6 views — %100.

Features

• Program Control — Load, run, pause, continue, restart, attach/detach, kill
• Breakpoints — Software/hardware breakpoints, watchpoints (read/write/access), conditional, ignore count, commands, catchpoints, export/import
• Step Operations — Step into/over/out, step instruction, step-over instruction, reverse step/continue
• Register Management — Read/write all CPU/FPU/SIMD registers, formatted dump, flag analysis, changed registers
• Memory Operations — Hex dump, write memory/bytes, fill pattern, search, compare regions, set permissions
• Disassembly — Full/range disassembly, current instruction, assembly patching, NOP fill
• Stack Analysis — Stack dump, push/pop/modify, frame info, backtrace, arguments, locals
• Symbol Resolution — Symbol lookup, modules, sections, entry point, symbol map, binary info
• Thread Support — List/switch threads, process info, thread info
• Expression Evaluation — C expression, variable get/set, string reading, type info (ptype/whatis)
• Code Analysis — Source listing, function info/bounds, references, ROP gadgets, basic blocks, CFG
• Code Patching — Assemble instruction, NOP range, fill zero, label address, comments/annotations
• Session Management — Save/load sessions, bookmark addresses, export/import breakpoints
• Remote Debugging — Connect to remote GDB server, generate core dumps
• Environment — Get/set/unset env vars, set working directory, TTY, signal handling
• Configuration — ASLR toggle, lazy binding toggle, debug output, session logging, signal ignore list
• Utility — Binary string convert (hex↔ascii↔utf-16), file↔VA offset convert, font config

Requirements

• Python >= 3.10
• GDB (GNU Debugger) installed on the system
• Linux (x86-64 recommended)

Installation

# Clone the repository
git clone https://github.com/oakkaya/edb-debugger-mcp.git
cd edb-debugger-mcp

# Install dependencies
pip install -r requirements.txt

# (Optional) Install with pip
pip install -e .

Usage

Standalone

python edb_debugger_mcp.py

This starts the MCP server on stdio, ready to accept MCP protocol messages.

Testing

# Compile a test binary
gcc -g -o /tmp/test_bin /path/to/test.c

# Then run the server manually or use an MCP client

Claude Desktop Integration

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "edb-debugger-mcp": {
      "command": "python",
      "args": ["/path/to/edb_debugger_mcp/edb_debugger_mcp.py"]
    }
  }
}

Tool Reference

Program Control (12 tools)

Tool	Description
edb_load_program	Load binary for debugging with optional args/working dir
edb_attach_process	Attach to running process by PID
edb_detach_process	Detach from debugged process
edb_kill_process	Kill the debugged process
edb_run	Start/restart execution
edb_continue	Continue after breakpoint/pause
edb_pause	Interrupt the running program
edb_restart	Kill and restart with breakpoints preserved
edb_continue_to	Run until target address is reached
edb_remote_connect	Connect to remote GDB server (gdbserver)
edb_generate_core_dump	Generate core dump of current process state
edb_send_signal	Send signal to debugee

Step Operations (8 tools)

Tool	Description
edb_step_into	Step into next instruction (source level)
edb_step_over	Step over next call (source level)
edb_step_out	Execute until function returns
edb_step_instruction	Step one instruction (assembly level, into calls)
edb_step_over_instruction	Step over one instruction (assembly level)
edb_reverse_step	Step backward one instruction (needs record)
edb_reverse_continue	Continue backward (needs record)
edb_jump_to_address	Set EIP/RIP to arbitrary address

Breakpoints (14 tools)

Tool	Description
edb_set_breakpoint	Set breakpoint at function/address/file:line
edb_set_hardware_breakpoint	Set hardware-assisted breakpoint
edb_set_watchpoint	Set watchpoint (write/read/access)
edb_set_catchpoint	Set catchpoint (exception/event/syscall)
edb_set_trace_point	Set conditional logging breakpoint
edb_set_breakpoint_condition	Add condition to breakpoint
edb_set_breakpoint_ignore_count	Set breakpoint ignore count
edb_breakpoint_commands	Set commands to run on breakpoint hit
edb_remove_breakpoint	Remove breakpoint by number
edb_enable_breakpoint	Enable disabled breakpoint
edb_disable_breakpoint	Disable breakpoint
edb_list_breakpoints	List all breakpoints with status
edb_breakpoint_export	Export breakpoints to JSON file
edb_breakpoint_import	Import breakpoints from JSON file

Register Operations (8 tools)

Tool	Description
edb_get_registers	Get all CPU register values
edb_get_register	Get single register value
edb_set_register	Modify a register value
edb_dump_registers	Formatted register dump with flag analysis
edb_get_changed_registers	Show all registers (EDB-style changed highlighting)
edb_get_fpu_state	Get FPU register state (ST0-ST7, control/status words)
edb_get_simd_state	Get SIMD register state (XMM/YMM/ZMM)
edb_get_arch_info	Get architecture info (pointer size, CPU type)

Memory Operations (13 tools)

Tool	Description
edb_read_memory	Hex dump memory at address with configurable format
edb_read_memory_as	Read memory as specified data type (int, float, char, etc.)
edb_write_memory	Write value to memory address
edb_write_memory_bytes	Write raw hex bytes to memory
edb_search_memory	Search memory for byte/string pattern
edb_dump_memory_to_file	Dump memory range to file
edb_fill_memory	Fill memory range with byte pattern
edb_get_memory_map	Get process memory map with permissions
edb_get_memory_region_info	Get memory region config (base, size, perms)
edb_set_memory_permissions	Set memory region permissions (R/W/X)
edb_compare_memory	Compare two memory regions
edb_compare_sections	Compare binary sections with in-memory data
edb_binary_string_convert	Convert between hex/ASCII/UTF-16 representations

Disassembly (7 tools)

Tool	Description
edb_disassemble	Disassemble at address or function name
edb_disassemble_range	Disassemble address range with configurable length
edb_get_current_instruction	Get instruction at program counter
edb_nop_range	NOP out instruction range
edb_assemble	Assemble instruction at address (Keystone optional)
edb_search_instructions	Search for instruction patterns (OpcodeSearcher)
edb_generate_cfg	Generate control flow graph in DOT format

Stack & Frames (10 tools)

Tool	Description
edb_get_stack	Dump stack contents
edb_get_stack_frame	Get stack frame details (RBP, RSP, return addr)
edb_get_backtrace	Get full call stack backtrace
edb_get_frame_info	Get detailed stack frame info
edb_get_arguments	Get function arguments
edb_get_locals	Get local variables
edb_get_variable	Get variable value
edb_set_variable	Modify variable value
edb_stack_push	Push value onto program stack
edb_stack_pop	Pop value from program stack
edb_stack_modify	Modify value at stack top without changing RSP

Symbol Analysis (9 tools)

Tool	Description
edb_lookup_symbol	Look up symbol address and type
edb_list_functions	List functions in binary
edb_get_function_info	Get function details (name, address, bounds)
edb_get_function_bounds	Get function start/end addresses
edb_list_modules	List loaded shared libraries
edb_get_section_info	Get ELF section information
edb_get_entry_point	Get program entry point
edb_get_binary_info	Get binary file info (arch, type, sections)
edb_generate_symbols	Generate binary symbol map (FAS loader)

Thread & Process (6 tools)

Tool	Description
edb_list_threads	List all threads with status
edb_get_current_thread	Get current thread info
edb_set_current_thread	Switch to different thread
edb_get_process_properties	Get process properties
edb_inferior_info	Get inferior/process info
edb_list_features	List GDB features and capabilities

Expression & Data (7 tools)

Tool	Description
edb_evaluate_expression	Evaluate C expression
edb_ptype	Print type definition of expression
edb_whatis	Print type name of expression
edb_get_string	Read null-terminated string from memory
edb_find_strings	Find printable strings in memory region
edb_find_references	Find code references to address
edb_string_references	Find string references in binary

Code Analysis (6 tools)

Tool	Description
edb_list_source	Display source code
edb_list_source_files	List compiled source files
edb_analyze_region	Analyze code region for functions
edb_analyze_calls_at	Analyze function calls at address
edb_analyze_basic_blocks	Analyze basic blocks in region
edb_analyze_heap	Analyze heap memory (HeapAnalyzer)

Patching & Annotations (8 tools)

Tool	Description
edb_call_function	Call function in debugged process
edb_label_address	Label an address in disassembly view
edb_add_comment	Add comment/annotation at address
edb_list_comments	List all address annotations
edb_remove_comment	Remove annotation at address
edb_add_bookmark	Add bookmark at address
edb_list_bookmarks	List all bookmarks
edb_remove_bookmark	Remove bookmark at address

Session & Environment (12 tools)

Tool	Description
edb_session_save	Save current debugging session to JSON
edb_session_load	Load debugging session from JSON
edb_set_working_directory	Set program working directory
edb_set_environment_variable	Set environment variable for debugee
edb_unset_environment_variable	Unset environment variable
edb_get_environment	Show environment variables
edb_set_tty	Set terminal for program I/O
edb_configure_debugger	Configure debugger settings
edb_show_configuration	Show GDB configuration
edb_disable_aslr	Toggle ASLR for debugee
edb_disable_lazy_binding	Toggle lazy binding
edb_load_symbol_file	Load symbol file (FAS loader)

Debugger Control (12 tools)

Tool	Description
edb_get_status	Get full debugger state
edb_get_stop_reason	Get last stop reason
edb_instruction_detail	Get detailed instruction info (InstructionInspector)
edb_dump_state	Dump full process state (DumpState plugin)
edb_signal_handling	Configure signal handling
edb_list_signals	List signals and their handling
edb_set_debug_output	Configure GDB debug output
edb_set_session_logging	Log GDB I/O to file
edb_view_at_address	View address in CPU/Dump/Stack views
edb_list_plugins	List loaded debugger plugins
edb_list_stack_arguments	List stack frame arguments
edb_find_rop_gadgets	Find ROP gadgets in binary

File Utils (2 tools)

Tool	Description
edb_va_to_file_offset	Convert virtual address to file offset
edb_file_offset_to_va	Convert file offset to virtual address

Architecture

┌─────────────────────┐     MCP Protocol      ┌──────────────────────┐
│   MCP Client        │ ◄──────────────────►  │   FastMCP Server     │
│ (Claude, Cursor)    │     stdio JSON-RPC    │   edb_debugger_mcp.py│
└─────────────────────┘                       └──────────┬───────────┘
                                                          │
                                                      GDB MI
                                                   (--interpreter=mi2)
                                                          │
                                                 ┌────────┴───────────┐
                                                 │   GDB Backend      │
                                                 │   gdb_backend.py   │
                                                 │  (async subprocess)│
                                                 │  MI parser + 123   │
                                                 │  public methods    │
                                                 └────────────────────┘

The server uses GDB's MI (Machine Interface) protocol (--interpreter=mi2) to communicate with GDB as a subprocess. The backend:

• Sends MI/CLI commands via stdin, parses structured MI responses
• Handles *stopped async events for breakpoint hits
• Manages process lifecycle (start, kill, detach)
• Provides readelf-based file offset ↔ VA conversion

Not: README'de belirtilen EDB action/dialog/view sayıları EDB'nin tüm UI öğelerini kapsar. Bu proje bir MCP sunucusu olduğu için UI-only özellikler (About dialog, font seçici, Reset UI, pencere düzeni) aktarılamamıştır. Tüm fonksiyonel debugging yetenekleri (breakpoint, register, memory, stack, thread, expression, patching, analiz, ROP, session) %100 kapsanmıştır.

EDB Plugin Mapping

Plugin	MCP Coverage
DebuggerCore	Execution, stepping, breakpoints, registers, memory, state
BreakpointManager	edb_set_breakpoint, edb_list_breakpoints, edb_export/import
HardwareBreakpoints	edb_set_hardware_breakpoint, edb_set_watchpoint
InstructionInspector	edb_instruction_detail
Assembler	edb_assemble (Keystone optional)
BinaryInfo	edb_get_binary_info
BinarySearcher	edb_search_memory
Backtrace	edb_get_backtrace
FasLoader	edb_load_symbol_file
DumpState	edb_dump_state
FunctionFinder	edb_list_functions
OpcodeSearcher	edb_search_instructions
References	edb_find_references, edb_string_references
ROPTool	edb_find_rop_gadgets
HeapAnalyzer	edb_analyze_heap
Analyzer	edb_analyze_region, edb_analyze_basic_blocks
SymbolViewer	edb_lookup_symbol
ProcessProperties	edb_get_process_properties
ODbgRegisterView	edb_get_registers, edb_get_fpu_state, edb_get_simd_state
Bookmarks	edb_add_bookmark, edb_list_bookmarks, edb_remove_bookmark
CheckVersion	Automatically handled
DebuggerErrorConsole	edb_set_debug_output

Binary Ninja Integration

The binaryninja_mcp/ directory contains a full Binary Ninja plugin that bridges the decompiler with the live debugger. Features:

• Register overlay — HLIL comments with live register values
• Single-click breakpoints — Right-click to toggle software/hardware breakpoints
• In-place patching — NOP, assemble, range-NOP from the disassembly context menu
• Step control — Step into/over/out, run, pause via Plugins menu
• Sidebar widget — Live register summary in the "EDB Debugger" tab

Install: ln -s $(pwd)/binaryninja_mcp ~/.binaryninja/plugins/edb-debugger-bridge

Project Structure

edb-debugger-mcp/
├── gdb_backend.py          # GDB MI backend (123 public methods, MI parser, session mgmt)
├── edb_debugger_mcp.py     # FastMCP server (135 edb_ tools, 83 Pydantic models)
├── pwntools_mcp.py         # Pwntools integration (12 pwntools_ tools: ROP, shellcode, ELF, asm, fmtstr)
├── binaryninja_mcp/        # Binary Ninja plugin (register overlay, right-click BP/patch, step)
├── pyproject.toml          # Project configuration
├── requirements.txt        # Python dependencies
├── README.md               # This file
├── LICENSE                 # MIT License
└── .gitignore              # Git ignore rules

License

MIT License — see LICENSE for details.