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lldbinit.py
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lldbinit.py
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'''
_ _ _ _ _ _ _
| | |_| | |_|_|___|_| |_
| | | . | . | | | | _|
|_|_|___|___|_|_|_|_|_|
lldbinit v3.0
A gdbinit clone for LLDB aka how to make LLDB a bit more useful and less crappy
Available at https://github.com/gdbinit/lldbinit
Original lldbinit code by Deroko @ https://github.com/deroko/lldbinit
gdbinit available @ https://github.com/gdbinit/Gdbinit
(c) Deroko 2014, 2015, 2016
(c) fG! 2017-2023 - reverser@put.as - https://reverse.put.as
No original license by Deroko.
All my modifications are under MIT license:
Copyright 2017-2023 Pedro Vilaca
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
Huge thanks to Deroko for his original effort!
To list all implemented commands use 'lldbinitcmds' command.
How to install it:
------------------
$ cp lldbinit.py ~
$ echo "command script import ~/lldbinit.py" >>$HOME/.lldbinit
or
just copy it somewhere and use "command script import path_to_script" when you want to load it.
Notes:
------
Version 3.0+ drops support for ARM32 and assumes ARM64 instead
TODO:
-----
- shortcut to dump memory to file
- check sbthread class: stepoveruntil for example
- help for aliases
- add source window?
- add threads window?
- command to search for symbol and display image address (image lookup -s symbol -v) (address is the range)
- command to update breakpoints with new ASLR
- solve addresses like lea rsi, [rip + 0x38cf] (lldb does solve some stuff that it has symbols for and adds the info as comment)
- swift support?
- window for floating point/neon registers? off by default - they are huge in length so it might look crappy
- exception state registers window?
BUGS:
-----
LLDB design:
------------
lldb -> debugger -> target -> process -> thread -> frame(s)
-> thread -> frame(s)
'''
if __name__ == "__main__":
print("Run only as script from LLDB... Not as standalone program!")
import lldb
import sys
import re
import os
import time
import struct
import argparse
import subprocess
import tempfile
import termios
import fcntl
try:
import keystone
CONFIG_KEYSTONE_AVAILABLE = 1
except ImportError:
CONFIG_KEYSTONE_AVAILABLE = 0
pass
VERSION = "3.0"
BUILD = "347"
#
# User configurable options
#
CONFIG_ENABLE_COLOR = 1
# light or dark mode
CONFIG_APPEARANCE = "light"
# display the instruction bytes in disassembler output
CONFIG_DISPLAY_DISASSEMBLY_BYTES = 1
# the maximum number of lines to display in disassembler output
CONFIG_DISASSEMBLY_LINE_COUNT = 8
# x/i and disas output customization - doesn't affect context disassembler output
CONFIG_USE_CUSTOM_DISASSEMBLY_FORMAT = 1
# enable all the register command shortcuts
CONFIG_ENABLE_REGISTER_SHORTCUTS = 1
# display stack contents on context stop
CONFIG_DISPLAY_STACK_WINDOW = 0
CONFIG_DISPLAY_FLOW_WINDOW = 0
# display data contents on context stop - an address for the data must be set with "datawin" command
CONFIG_DISPLAY_DATA_WINDOW = 0
# disassembly flavor 'intel' or 'att' - default is Intel unless AT&T syntax is your cup of tea
CONFIG_FLAVOR = "intel"
# setup the logging level, which is a bitmask of any of the following possible values (don't use spaces, doesn't seem to work)
#
# LOG_VERBOSE LOG_PROCESS LOG_THREAD LOG_EXCEPTIONS LOG_SHLIB LOG_MEMORY LOG_MEMORY_DATA_SHORT LOG_MEMORY_DATA_LONG LOG_MEMORY_PROTECTIONS LOG_BREAKPOINTS LOG_EVENTS LOG_WATCHPOINTS
# LOG_STEP LOG_TASK LOG_ALL LOG_DEFAULT LOG_NONE LOG_RNB_MINIMAL LOG_RNB_MEDIUM LOG_RNB_MAX LOG_RNB_COMM LOG_RNB_REMOTE LOG_RNB_EVENTS LOG_RNB_PROC LOG_RNB_PACKETS LOG_RNB_ALL LOG_RNB_DEFAULT
# LOG_DARWIN_LOG LOG_RNB_NONE
#
# to see log (at least in macOS)
# $ log stream --process debugserver --style compact
# (or whatever style you like)
CONFIG_LOG_LEVEL = "LOG_NONE"
# removes the offsets and modifies the module name position
# reference: https://lldb.llvm.org/formats.html
CUSTOM_DISASSEMBLY_FORMAT = "\"{${function.initial-function}{${function.name-without-args}} @ {${module.file.basename}}:\n}{${function.changed}\n{${function.name-without-args}} @ {${module.file.basename}}:\n}{${current-pc-arrow} }${addr-file-or-load}: \""
# the colors definitions - don't mess with this
if CONFIG_ENABLE_COLOR:
RESET = "\033[0m"
BOLD = "\033[1m"
UNDERLINE = "\033[4m"
REVERSE = "\033[7m"
BLACK = "\033[30m"
RED = "\033[31m"
GREEN = "\033[32m"
YELLOW = "\033[33m"
BLUE = "\033[34m"
MAGENTA = "\033[35m"
CYAN = "\033[36m"
WHITE = "\033[37m"
else:
RESET = ""
BOLD = ""
UNDERLINE = ""
REVERSE = ""
BLACK = ""
RED = ""
GREEN = ""
YELLOW = ""
BLUE = ""
MAGENTA = ""
CYAN = ""
WHITE = ""
# default colors - modify as you wish
# since these are just strings modes can be combined
if CONFIG_APPEARANCE == "light":
COLOR_REGVAL = BLACK
COLOR_REGNAME = GREEN
COLOR_CPUFLAGS = BOLD + UNDERLINE + MAGENTA
COLOR_SEPARATOR = BOLD + BLUE
COLOR_HIGHLIGHT_LINE = RED
COLOR_REGVAL_MODIFIED = RED
COLOR_SYMBOL_NAME = BLUE
COLOR_CURRENT_PC = RED
COLOR_CONDITIONAL_YES = REVERSE + GREEN
COLOR_CONDITIONAL_NO = REVERSE + RED
COLOR_HEXDUMP_HEADER = BLUE
COLOR_HEXDUMP_ADDR = BLACK
COLOR_HEXDUMP_DATA = BLACK
COLOR_HEXDUMP_ASCII = BLACK
elif CONFIG_APPEARANCE == "dark":
COLOR_REGVAL = WHITE
COLOR_REGNAME = GREEN
COLOR_CPUFLAGS = BOLD + UNDERLINE + MAGENTA
COLOR_SEPARATOR = CYAN
COLOR_HIGHLIGHT_LINE = RED
COLOR_REGVAL_MODIFIED = RED
COLOR_SYMBOL_NAME = BLUE
COLOR_CURRENT_PC = RED
COLOR_CONDITIONAL_YES = REVERSE + GREEN
COLOR_CONDITIONAL_NO = REVERSE + RED
COLOR_HEXDUMP_HEADER = BLUE
COLOR_HEXDUMP_ADDR = WHITE
COLOR_HEXDUMP_DATA = WHITE
COLOR_HEXDUMP_ASCII = WHITE
else:
print("[-] Invalid CONFIG_APPEARANCE value.")
# configure the separator character between the "windows" and their size
SEPARATOR = "-"
# minimum terminal width 120 chars
I386_TOP_SIZE = 81
I386_STACK_SIZE = I386_TOP_SIZE - 1
I386_BOTTOM_SIZE = 87
# minimum terminal width 125 chars
X64_TOP_SIZE = 119
X64_STACK_SIZE = X64_TOP_SIZE - 1
X64_BOTTOM_SIZE = 125
# minimum terminal width 108 chars
ARM_TOP_SIZE = 102
ARM_STACK_SIZE = ARM_TOP_SIZE - 1
ARM_BOTTOM_SIZE = 108
#
# Don't mess after here unless you know what you are doing!
#
DATA_WINDOW_ADDRESS = 0
POINTER_SIZE = 8
old_x86 = { "eax": 0, "ecx": 0, "edx": 0, "ebx": 0, "esp": 0, "ebp": 0, "esi": 0, "edi": 0, "eip": 0,
"eflags": 0, "cs": 0, "ds": 0, "fs": 0, "gs": 0, "ss": 0, "es": 0 }
old_x64 = { "rax": 0, "rcx": 0, "rdx": 0, "rbx": 0, "rsp": 0, "rbp": 0, "rsi": 0, "rdi": 0, "rip": 0,
"r8": 0, "r9": 0, "r10": 0, "r11": 0, "r12": 0, "r13": 0, "r14": 0, "r15": 0,
"rflags": 0, "cs": 0, "fs": 0, "gs": 0 }
old_arm64 = { "x0": 0, "x1": 0, "x2": 0, "x3": 0, "x4": 0, "x5": 0, "x6": 0, "x7": 0, "x8": 0, "x9": 0, "x10": 0,
"x11": 0, "x12": 0, "x13": 0, "x14": 0, "x15": 0, "x16": 0, "x17": 0, "x18": 0, "x19": 0, "x20": 0,
"x21": 0, "x22": 0, "x23": 0, "x24": 0, "x25": 0, "x26": 0, "x27": 0, "x28": 0, "fp": 0, "lr": 0,
"sp": 0, "pc": 0, "cpsr": 0 }
GlobalListOutput = []
int3patches = {}
crack_cmds = []
crack_cmds_noret = []
modules_list = []
# dyld modes
dyld_mode_dict = {
0: "dyld_image_adding",
1: "dyld_image_removing",
2: "dyld_image_info_change",
3: "dyld_image_dyld_moved"
}
MIN_COLUMNS = 125
MIN_ROWS = 25
# test terminal - idea from https://github.com/ant4g0nist/lisa.py/
try:
tty_rows, tty_columns = struct.unpack("hh", fcntl.ioctl(1, termios.TIOCGWINSZ, "1234"))
# i386 is fine with 87x21
# x64 is fine with 125x23
# aarch64 is fine with 108x26
if tty_columns < MIN_COLUMNS or tty_rows < MIN_ROWS:
print("\033[1m\033[31m[!] current terminal size is {:d}x{:d}".format(tty_columns, tty_rows))
print("[!] lldbinit is best experienced with a terminal size at least {}x{}\033[0m".format(MIN_COLUMNS, MIN_ROWS))
except Exception as e:
print("\033[1m\033[31m[-] failed to find out terminal size.")
print("[!] lldbinit is best experienced with a terminal size at least {}x{}\033[0m".format(MIN_COLUMNS, MIN_ROWS))
def __lldb_init_module(debugger, internal_dict):
''' we can execute lldb commands using debugger.HandleCommand() which makes all output to default
lldb console. With SBDebugger.GetCommandinterpreter().HandleCommand() we can consume all output
with SBCommandReturnObject and parse data before we send it to output (eg. modify it);
in practice there is nothing here in initialization or anywhere else that we want to modify
'''
# don't load if we are in Xcode since it is not compatible and will block Xcode
if os.getenv('PATH').startswith('/Applications/Xcode'):
return
res = lldb.SBCommandReturnObject()
ci = debugger.GetCommandInterpreter()
# settings
ci.HandleCommand("settings set target.x86-disassembly-flavor " + CONFIG_FLAVOR, res)
ci.HandleCommand("settings set prompt \"(lldbinit) \"", res)
ci.HandleCommand("settings set stop-disassembly-count 0", res)
# set the log level - must be done on startup?
ci.HandleCommand("settings set target.process.extra-startup-command QSetLogging:bitmask=" + CONFIG_LOG_LEVEL + ";", res)
if CONFIG_USE_CUSTOM_DISASSEMBLY_FORMAT == 1:
ci.HandleCommand("settings set disassembly-format " + CUSTOM_DISASSEMBLY_FORMAT, res)
# the hook that makes everything possible :-)
ci.HandleCommand("command script add -f lldbinit.HandleHookStopOnTarget HandleHookStopOnTarget", res)
ci.HandleCommand("command script add -f lldbinit.HandleHookStopOnTarget context", res)
ci.HandleCommand("command alias ctx HandleHookStopOnTarget", res)
# commands
ci.HandleCommand("command script add -f lldbinit.cmd_lldbinitcmds lldbinitcmds", res)
ci.HandleCommand("command script add -f lldbinit.cmd_IphoneConnect iphone", res)
#
# dump memory commands
#
ci.HandleCommand("command script add -f lldbinit.cmd_db db", res)
ci.HandleCommand("command script add -f lldbinit.cmd_dw dw", res)
ci.HandleCommand("command script add -f lldbinit.cmd_dd dd", res)
ci.HandleCommand("command script add -f lldbinit.cmd_dq dq", res)
ci.HandleCommand("command script add -f lldbinit.cmd_DumpInstructions u", res)
ci.HandleCommand("command script add -f lldbinit.cmd_findmem findmem", res)
ci.HandleCommand("command script add -f lldbinit.cmd_showregions showregions", res)
#
# Settings related commands
#
ci.HandleCommand("command script add -f lldbinit.cmd_enable enable", res)
ci.HandleCommand("command script add -f lldbinit.cmd_disable disable", res)
ci.HandleCommand("command script add -f lldbinit.cmd_contextcodesize contextcodesize", res)
# a few settings aliases
ci.HandleCommand("command alias enablesolib enable solib", res)
ci.HandleCommand("command alias disablesolib disable solib", res)
ci.HandleCommand("command alias enableaslr enable aslr", res)
ci.HandleCommand("command alias disableaslr disable aslr", res)
#
# Breakpoint related commands
#
ci.HandleCommand("command script add -f lldbinit.cmd_bhb bhb", res)
ci.HandleCommand("command script add -f lldbinit.cmd_bht bht", res)
ci.HandleCommand("command script add -f lldbinit.cmd_bpt bpt", res)
ci.HandleCommand("command script add -f lldbinit.cmd_bpn bpn", res)
ci.HandleCommand("command script add -f lldbinit.cmd_bm bm", res)
ci.HandleCommand("command script add -f lldbinit.cmd_bmc bmc", res)
ci.HandleCommand("command script add -f lldbinit.cmd_antidebug antidebug", res)
ci.HandleCommand("command script add -f lldbinit.cmd_print_notifier_images print_images", res)
# disable a breakpoint or all
ci.HandleCommand("command script add -f lldbinit.cmd_bpd bpd", res)
ci.HandleCommand("command script add -f lldbinit.cmd_bpda bpda", res)
# clear a breakpoint or all
ci.HandleCommand("command script add -f lldbinit.cmd_bpc bpc", res)
ci.HandleCommand("command alias bpca breakpoint delete", res)
# enable a breakpoint or all
ci.HandleCommand("command script add -f lldbinit.cmd_bpe bpe", res)
ci.HandleCommand("command script add -f lldbinit.cmd_bpea bpea", res)
# commands to set temporary int3 patches and restore original bytes
ci.HandleCommand("command script add -f lldbinit.cmd_int3 int3", res)
ci.HandleCommand("command script add -f lldbinit.cmd_rint3 rint3", res)
ci.HandleCommand("command script add -f lldbinit.cmd_listint3 listint3", res)
ci.HandleCommand("command script add -f lldbinit.cmd_nop nop", res)
ci.HandleCommand("command script add -f lldbinit.cmd_null null", res)
# change eflags commands
ci.HandleCommand("command script add -f lldbinit.cmd_cfa cfa", res)
ci.HandleCommand("command script add -f lldbinit.cmd_cfc cfc", res)
ci.HandleCommand("command script add -f lldbinit.cmd_cfd cfd", res)
ci.HandleCommand("command script add -f lldbinit.cmd_cfi cfi", res)
ci.HandleCommand("command script add -f lldbinit.cmd_cfo cfo", res)
ci.HandleCommand("command script add -f lldbinit.cmd_cfp cfp", res)
ci.HandleCommand("command script add -f lldbinit.cmd_cfs cfs", res)
ci.HandleCommand("command script add -f lldbinit.cmd_cft cft", res)
ci.HandleCommand("command script add -f lldbinit.cmd_cfz cfz", res)
# change NZCV flags - exclusive commands to AArch64 (Z, C are common)
ci.HandleCommand("command script add -f lldbinit.cmd_cfn cfn", res)
ci.HandleCommand("command script add -f lldbinit.cmd_cfv cfv", res)
# skip/step current instruction commands
ci.HandleCommand("command script add -f lldbinit.cmd_skip skip", res)
ci.HandleCommand("command script add -f lldbinit.cmd_stepo stepo", res)
# load breakpoints from file
ci.HandleCommand("command script add -f lldbinit.cmd_LoadBreakPoints lb", res)
ci.HandleCommand("command script add -f lldbinit.cmd_LoadBreakPointsRva lbrva", res)
# cracking friends
ci.HandleCommand("command script add -f lldbinit.cmd_crack crack", res)
ci.HandleCommand("command script add -f lldbinit.cmd_crackcmd crackcmd", res)
ci.HandleCommand("command script add -f lldbinit.cmd_crackcmd_noret crackcmd_noret", res)
# alias for existing breakpoint commands
# list all breakpoints
ci.HandleCommand("command alias bpl breakpoint list", res)
# alias "bp" command that exists in gdbinit - lldb also has alias for "b"
ci.HandleCommand("command alias bp _regexp-break", res)
# to set breakpoint commands - I hate typing too much
ci.HandleCommand("command alias bcmd breakpoint command add", res)
# launch process and stop at entrypoint (not exactly as gdb command that just inserts breakpoint)
# usually it will be inside dyld and not the target main()
ci.HandleCommand("command alias break_entrypoint process launch --stop-at-entry", res)
ci.HandleCommand("command script add -f lldbinit.cmd_show_loadcmds show_loadcmds", res)
ci.HandleCommand("command script add -f lldbinit.cmd_show_header show_header", res)
ci.HandleCommand("command script add -f lldbinit.cmd_tester tester", res)
ci.HandleCommand("command script add -f lldbinit.cmd_datawin datawin", res)
# used mostly for aliases below but can be called as other commands
ci.HandleCommand("command script add -f lldbinit.cmd_update_register update_register", res)
# shortcut command to modify registers content
if CONFIG_ENABLE_REGISTER_SHORTCUTS == 1:
# x64
ci.HandleCommand("command alias rip update_register rip", res)
ci.HandleCommand("command alias rax update_register rax", res)
ci.HandleCommand("command alias rbx update_register rbx", res)
ci.HandleCommand("command alias rbp update_register rbp", res)
ci.HandleCommand("command alias rsp update_register rsp", res)
ci.HandleCommand("command alias rdi update_register rdi", res)
ci.HandleCommand("command alias rsi update_register rsi", res)
ci.HandleCommand("command alias rdx update_register rdx", res)
ci.HandleCommand("command alias rcx update_register rcx", res)
ci.HandleCommand("command alias r8 update_register r8", res)
ci.HandleCommand("command alias r9 update_register r9", res)
ci.HandleCommand("command alias r10 update_register r10", res)
ci.HandleCommand("command alias r11 update_register r11", res)
ci.HandleCommand("command alias r12 update_register r12", res)
ci.HandleCommand("command alias r13 update_register r13", res)
ci.HandleCommand("command alias r14 update_register r14", res)
ci.HandleCommand("command alias r15 update_register r15", res)
# x86
ci.HandleCommand("command alias eip update_register eip", res)
ci.HandleCommand("command alias eax update_register eax", res)
ci.HandleCommand("command alias ebx update_register ebx", res)
ci.HandleCommand("command alias ebp update_register ebp", res)
ci.HandleCommand("command alias esp update_register esp", res)
ci.HandleCommand("command alias edi update_register edi", res)
ci.HandleCommand("command alias esi update_register esi", res)
ci.HandleCommand("command alias edx update_register edx", res)
ci.HandleCommand("command alias ecx update_register ecx", res)
# ARM64
ci.HandleCommand("command alias x0 update_register x0", res)
ci.HandleCommand("command alias x1 update_register x1", res)
ci.HandleCommand("command alias x2 update_register x2", res)
ci.HandleCommand("command alias x3 update_register x3", res)
ci.HandleCommand("command alias x4 update_register x4", res)
ci.HandleCommand("command alias x5 update_register x5", res)
ci.HandleCommand("command alias x6 update_register x6", res)
ci.HandleCommand("command alias x7 update_register x7", res)
ci.HandleCommand("command alias x8 update_register x8", res)
ci.HandleCommand("command alias x9 update_register x9", res)
ci.HandleCommand("command alias x10 update_register x10", res)
ci.HandleCommand("command alias x11 update_register x11", res)
ci.HandleCommand("command alias x12 update_register x12", res)
ci.HandleCommand("command alias x13 update_register x13", res)
ci.HandleCommand("command alias x14 update_register x14", res)
ci.HandleCommand("command alias x15 update_register x15", res)
ci.HandleCommand("command alias x16 update_register x16", res)
ci.HandleCommand("command alias x17 update_register x17", res)
ci.HandleCommand("command alias x18 update_register x18", res)
ci.HandleCommand("command alias x19 update_register x19", res)
ci.HandleCommand("command alias x20 update_register x20", res)
ci.HandleCommand("command alias x21 update_register x21", res)
ci.HandleCommand("command alias x22 update_register x22", res)
ci.HandleCommand("command alias x23 update_register x23", res)
ci.HandleCommand("command alias x24 update_register x24", res)
ci.HandleCommand("command alias x25 update_register x25", res)
ci.HandleCommand("command alias x26 update_register x26", res)
ci.HandleCommand("command alias x27 update_register x27", res)
ci.HandleCommand("command alias x28 update_register x28", res)
if CONFIG_KEYSTONE_AVAILABLE == 1:
ci.HandleCommand("command script add -f lldbinit.cmd_asm32 asm32", res)
ci.HandleCommand("command script add -f lldbinit.cmd_asm64 asm64", res)
ci.HandleCommand("command script add -f lldbinit.cmd_arm32 arm32", res)
ci.HandleCommand("command script add -f lldbinit.cmd_arm64 arm64", res)
ci.HandleCommand("command script add -f lldbinit.cmd_armthumb armthumb", res)
# add the hook - we don't need to wait for a target to be loaded
# Note: since I removed the original stop-disassembly-count trick to allegedly avoid
# double loading it had a side effect to keep adding multiple copies of the hook
# when doing multiple imports of the script (for testing mostly)
# a check is now implemented where the hook is only added if no previous hook exist
ci.HandleCommand("target stop-hook list", res)
if res.Succeeded():
if "HandleHookStopOnTarget" not in res.GetOutput():
ci.HandleCommand("target stop-hook add -o 'HandleHookStopOnTarget'", res)
else:
print("[-] error: failed to list stop hooks and our hook isn't loaded")
ci.HandleCommand("command script add --function lldbinit.cmd_banner banner", res)
# custom commands
ci.HandleCommand("command script add -f lldbinit.cmd_fixret fixret", res)
# displays the version banner when lldb is loaded
debugger.HandleCommand("banner")
return
def cmd_banner(debugger,command,result,dict):
print(GREEN + "[+] Loaded lldbinit version " + VERSION + "." + BUILD + RESET)
def cmd_lldbinitcmds(debugger, command, result, dict):
'''Display all available lldbinit commands.'''
help_table = [
[ "lldbinitcmds", "this command" ],
[ "----[ Settings ]----", ""],
[ "enable", "configure lldb and lldbinit options" ],
[ "disable", "configure lldb and lldbinit options" ],
[ "contextcodesize", "set number of instruction lines in code window" ],
[ "enablesolib/disablesolib", "enable/disable the stop on library load events" ],
[ "enableaslr/disableaslr", "enable/disable process ASLR" ],
[ "datawin", "set start address to display on data window" ],
[ "----[ Breakpoints ]----", ""],
[ "b", "breakpoint address" ],
[ "bpt", "set a temporary software breakpoint" ],
[ "bhb", "set an hardware breakpoint" ],
[ "bpc", "clear breakpoint" ],
[ "bpca", "clear all breakpoints" ],
[ "bpd", "disable breakpoint" ],
[ "bpda", "disable all breakpoints" ],
[ "bpe", "enable a breakpoint" ],
[ "bpea", "enable all breakpoints" ],
[ "bcmd", "alias to breakpoint command add"],
[ "bpl", "list all breakpoints"],
[ "bpn", "temporarly breakpoint next instruction" ],
[ "bm", "breakpoint on specific module load" ],
[ "bmc", "clear all module load breakpoints" ],
[ "break_entrypoint", "launch target and stop at entrypoint" ],
[ "skip", "skip current instruction" ],
[ "int3", "patch memory address with INT3" ],
[ "rint3", "restore original byte at address patched with INT3" ],
[ "listint3", "list all INT3 patched addresses" ],
[ "lb", "load breakpoints from file and apply them (currently only func names are applied)" ],
[ "lbrva", "load breakpoints from file and apply to main executable, only RVA in this case" ],
[ "print_images", "print all images available at gdb_image_notifier() breakpoint"],
[ "----[ Memory ]----", ""],
[ "nop", "patch memory address with NOP" ],
[ "null", "patch memory address with NULL" ],
[ "db/dw/dd/dq", "memory hex dump in different formats" ],
[ "findmem", "search memory" ],
[ "showregions", "display process memory regions" ],
[ "----[ Disassembly ]----", ""],
[ "u", "dump instructions" ],
[ "ctx/context", "show current instruction pointer CPU context" ],
[ "stepo", "step over calls and loop instructions" ],
[ "----[ Registers and CPU Flags ]----", ""],
[ "rip/rax/rbx/etc", "shortcuts to modify x64 registers" ],
[ "eip/eax/ebx/etc", "shortcuts to modify x86 registers" ],
[ "x{0..28}", "shortcuts to modify ARM64 registers" ],
[ "cfa/cfc/cfd/cfi/cfo/cfp/cfs/cft/cfz", "change x86/x64 CPU flags" ],
[ "cfn/cfz/cfc/cfv", "change AArch64 CPU flags (NZCV register)"],
[ "----[ File headers ]----", ""],
[ "show_loadcmds", "show otool output of Mach-O load commands" ],
[ "show_header", "show otool output of Mach-O header" ],
[ "----[ Cracking ]----", ""],
[ "crack", "return from current function" ],
[ "crackcmd", "set a breakpoint and return from that function" ],
[ "crackcmd_noret", "set a breakpoint and set a register value. doesn't return from function" ],
[ "----[ Misc ]----", ""],
[ "iphone", "connect to debugserver running on iPhone" ],
[ "----[ Assembler ]----", ""],
[ "asm32/asm64", "x86/x64 assembler using keystone" ],
[ "arm32/arm64/armthumb", "ARM assembler using keystone" ]
]
print("lldbinit available commands:")
for row in help_table:
if not row[1]:
print(" {: <20} {: <30}".format(*row))
else:
print(" {: <20} - {: <30}".format(*row))
print("\nUse \'cmdname help\' for extended command help.")
# placeholder to make tests
def cmd_tester(debugger, command, result, dict):
print("test")
return
# -------------------------
# Settings related commands
# -------------------------
def cmd_enable(debugger, command, result, dict):
'''Enable certain lldb and lldbinit options. Use \'enable help\' for more information.'''
help = """
Enable certain lldb and lldbinit configuration options.
Syntax: enable <setting>
Available settings:
solib: enable stop on library events trick.
aslr: enable process aslr.
stack: enable stack window in context display.
data: enable data window in context display, configure address with datawin.
flow: enable call targets and objective-c class/methods window in context display.
"""
global CONFIG_DISPLAY_STACK_WINDOW
global CONFIG_DISPLAY_FLOW_WINDOW
global CONFIG_DISPLAY_DATA_WINDOW
cmd = command.split()
if len(cmd) == 0:
print("[-] error: command requires argument.")
print("")
print(help)
return
if cmd[0] == "solib":
debugger.HandleCommand("settings set target.process.stop-on-sharedlibrary-events true")
print("[+] Enabled stop on library events trick.")
elif cmd[0] == "aslr":
debugger.HandleCommand("settings set target.disable-aslr false")
print("[+] Enabled ASLR.")
elif cmd[0] == "stack":
CONFIG_DISPLAY_STACK_WINDOW = 1
print("[+] Enabled stack window in context display.")
elif cmd[0] == "flow":
CONFIG_DISPLAY_FLOW_WINDOW = 1
print("[+] Enabled indirect control flow window in context display.")
elif cmd[0] == "data":
CONFIG_DISPLAY_DATA_WINDOW = 1
print("[+] Enabled data window in context display. Configure address with \'datawin\' cmd.")
elif cmd[0] == "help":
print(help)
else:
print("[-] error: unrecognized command.")
print(help)
return
def cmd_disable(debugger, command, result, dict):
'''Disable certain lldb and lldbinit options. Use \'disable help\' for more information.'''
help = """
Disable certain lldb and lldbinit configuration options.
Syntax: disable <setting>
Available settings:
solib: disable stop on library events trick.
aslr: disable process aslr.
stack: disable stack window in context display.
data: disable data window in context display.
flow: disable call targets and objective-c class/methods window in context display.
"""
global CONFIG_DISPLAY_STACK_WINDOW
global CONFIG_DISPLAY_FLOW_WINDOW
global CONFIG_DISPLAY_DATA_WINDOW
cmd = command.split()
if len(cmd) == 0:
print("[-] error: command requires argument.")
print("")
print(help)
return
if cmd[0] == "solib":
debugger.HandleCommand("settings set target.process.stop-on-sharedlibrary-events false")
print("[+] Disabled stop on library events trick.")
elif cmd[0] == "aslr":
debugger.HandleCommand("settings set target.disable-aslr true")
print("[+] Disabled ASLR.")
elif cmd[0] == "stack":
CONFIG_DISPLAY_STACK_WINDOW = 0
print("[+] Disabled stack window in context display.")
elif cmd[0] == "flow":
CONFIG_DISPLAY_FLOW_WINDOW = 0
print("[+] Disabled indirect control flow window in context display.")
elif cmd[0] == "data":
CONFIG_DISPLAY_DATA_WINDOW = 0
print("[+] Disabled data window in context display.")
elif cmd[0] == "help":
print(help)
else:
print("[-] error: unrecognized command.")
print(help)
return
def cmd_contextcodesize(debugger, command, result, dict):
'''Set the number of disassembly lines in code window. Use \'contextcodesize help\' for more information.'''
help = """
Configures the number of disassembly lines displayed in code window. Default is 8.
Syntax: contextcodesize <line_count>
Note: expressions supported, do not use spaces between operators.
"""
global CONFIG_DISASSEMBLY_LINE_COUNT
cmd = command.split()
if len(cmd) != 1:
print("[-] error: please insert the number of disassembly lines to display.")
print("")
print(help)
return
if cmd[0] == "help":
print(help)
print("\nCurrent configuration value is: {:d}".format(CONFIG_DISASSEMBLY_LINE_COUNT))
return
value = evaluate(cmd[0])
if value is None:
print("[-] error: invalid input value.")
print("")
print(help)
return
CONFIG_DISASSEMBLY_LINE_COUNT = value
return
# ---------------------------------
# Color and output related commands
# ---------------------------------
# append data to the output that we display at the end of the hook-stop
def output(x):
global GlobalListOutput
GlobalListOutput.append(x)
# ---------------------------
# Breakpoint related commands
# ---------------------------
ANTIDEBUG_SYSCTL_OBJS = []
# the second step breakpoint callback of the sysctl antidebug bypass
# we are at the return address of sysctl symbol
# and we simply remove the P_TRACED flag if it exists
def antidebug_callback_step2(frame, bp_loc, dict):
global ANTIDEBUG_SYSCTL_OBJS
for i in ANTIDEBUG_SYSCTL_OBJS:
#print(hex(i))
ANTIDEBUG_SYSCTL_OBJS.remove(i)
# offset to kp_proc.p_flag - this should be stable
offset = 0x20
target = get_target()
error = lldb.SBError()
# read the current value so we can modify and write again
# we could probably use an expression via cmdline to make it easier
value = get_process().ReadUnsignedFromMemory(i+offset, 4, error)
#print("before {}".format(hex(value)))
# remve P_TRACED flag if exists
value = value ^ 0x800
# WriteMemory accepts a string so we need to pack this
patch = struct.pack("I", value)
result = target.GetProcess().WriteMemory(i+offset, patch, error)
if not error.Success():
print("[-] error: Failed to write memory at 0x{:x}.".format(i+offset))
return
#value = get_process().ReadUnsignedFromMemory(i+offset, 4, error)
#print("after {}".format(hex(value)))
get_process().Continue()
# the first step breakpoint callback of the sysctl antidebug bypass
# this deals with the breakpoint at sysctl symbol
# the purpose is to verify the request and set a second stage on return address
# where the debug flag is removed
def antidebug_callback_step1(frame, bp_loc, dict):
global ANTIDEBUG_SYSCTL_OBJS
if frame is None:
return 0
target = get_target()
rdi = int(frame.FindRegister('rdi').GetValue(), 16)
error = lldb.SBError()
mib0 = get_process().ReadUnsignedFromMemory(rdi, 4, error)
if not error.Success():
print("[-] error: failed to read mib0")
return
mib1 = get_process().ReadUnsignedFromMemory(rdi+4, 4, error)
if not error.Success():
print("[-] error: failed to read mib1")
return
mib2 = get_process().ReadUnsignedFromMemory(rdi+8, 4, error)
if not error.Success():
print("[-] error: failed to read mib2")
return
# check if it's a potential AmIBeingDebugged request
# it's a common request from some apps
# so we need to verify on the return and remove the flag
if mib0 == 1 and mib1 == 14 and mib2 == 1:
print("[+] Hit sysctl antidebug request")
rdx = int(frame.FindRegister('rdx').GetValue(), 16)
if rdx == 0:
print("[!] warning: rdx == 0")
get_process().Continue()
ANTIDEBUG_SYSCTL_OBJS.append(rdx)
# set a temporary breakpoint on the ret
# temporary because we can't sync this with other sysctl calls
mem_sbaddr = lldb.SBAddress(int(frame.FindRegister('pc').GetValue(), 16), target)
instructions_mem = target.ReadInstructions(mem_sbaddr, 64, "intel")
for mem_inst in instructions_mem:
#print(hex(mem_inst.addr.GetLoadAddress(target)), mem_inst.mnemonic)
if mem_inst.GetMnemonic(target) == 'ret':
breakpoint = target.BreakpointCreateByAddress(mem_inst.addr.GetLoadAddress(target))
breakpoint.SetOneShot(True)
breakpoint.SetThreadID(get_frame().GetThread().GetThreadID())
breakpoint.SetScriptCallbackFunction('lldbinit.antidebug_callback_step2')
# everything automatic here so continue in any case
get_process().Continue()
def taskexception_callback(frame, bp_loc, dict):
if frame is None:
return 0
print("[+] Hit task_set_exception_ports request")
target = get_target()
thread = frame.GetThread()
# the SBValue to ReturnFromFrame must be eValueTypeRegister type
# if we do a lldb.SBValue() we can't set to that type
# so we need to make a copy
# can we use FindRegister() from frame?
return_value = frame.reg["rax"]
return_value.value = str(0)
thread.ReturnFromFrame(frame, return_value)
#get_process().Continue()
def cmd_antidebug(debugger, command, result, dict):
'''Enable anti-anti-debugging. Use \'antidebug help\' for more information.'''
help = """
Enable anti-anti-debugging measures.
Bypasses sysctl AmIBeingDebugged debugger detection.
Syntax: antidebug
"""
global modules_list
cmd = command.split()
if len(cmd) > 0 and cmd[0] == "help":
print(help)
return
if is_arm():
print("[-] error: unsupported architecture for this command.")
return
target = get_target()
for m in target.module_iter():
# print(m.file.fullpath)
if m.file.fullpath == "/usr/lib/dyld":
breakpoint = target.BreakpointCreateByName("sysctl", '/usr/lib/system/libsystem_c.dylib')
breakpoint.SetScriptCallbackFunction('lldbinit.antidebug_callback_step1')
#breakpoint2 = target.BreakpointCreateByName("task_set_exception_ports", '/usr/lib/system/libsystem_kernel.dylib')
#breakpoint2.SetScriptCallbackFunction('lldbinit.taskexception_callback')
break
# the callback for the specific module loaded breakpoint
# supports x64, i386, arm64
def module_breakpoint_callback(frame, bp_loc, dict):
global modules_list
# rdx contains the module address
# rdx+8 contains pointer to the module name string
if frame is None:
return 0
error = lldb.SBError()
i386 = is_i386()
x64 = is_x64()
arm = is_arm()
if not i386 and not x64 and not arm:
print("[-] error: unsupported architecture.")
# for i386 we need the stack pointer to retrieve arguments
if i386:
sp = frame.FindRegister("esp")
sp = int(sp.GetValue(), 16)
# static void gdb_image_notifier(enum dyld_image_mode mode, uint32_t infoCount, const dyld_image_info info[])
# static void lldb_image_notifier(enum dyld_image_mode mode, uint32_t infoCount, const dyld_image_info info[])
if x64:
pc = frame.FindRegister("rdi")
mode = int(pc.GetValue(), 16)
elif arm:
# argument registers from x0 to x7
pc = frame.FindRegister("x0")
mode = int(pc.GetValue(), 16)
elif i386:
mode = get_process().ReadUnsignedFromMemory(sp+4, 4, error)
if not error.Success():
print("[-] error: failed to read mode from stack.")
return
# only interested in new images
# enum dyld_image_mode { dyld_image_adding=0, dyld_image_removing=1, dyld_image_info_change=2, dyld_image_dyld_moved=3 };
if mode != 0:
get_process().Continue()
return
# infoCount argument
if x64:
pc = frame.FindRegister("rsi")
infoCount = int(pc.GetValue(), 16)
elif arm:
pc = frame.FindRegister("x1")
infoCount = int(pc.GetValue(), 16)
elif i386:
infoCount = get_process().ReadUnsignedFromMemory(sp+8, 4, error)
if not error.Success():
print("[-] error: failed to read infoCount from stack.")
return
# info argument
if x64:
pc = frame.FindRegister("rdx")
info = int(pc.GetValue(), 16)
elif arm:
pc = frame.FindRegister("x2")
info = int(pc.GetValue(), 16)
elif i386:
info = get_process().ReadUnsignedFromMemory(sp+12, 4, error)
if not error.Success():
print("[-] error: failed to read address from rdx.")
return
# set values according to target platform
if i386:
readSize = 4
# sizeof(struct dyld_image_info) - this should be constant?
dyld_image_info_size = 4 * 3
else:
readSize = 8
dyld_image_info_size = 8 * 3
hit = 0
# go over all the images being added and try to found the ones we are interested in
for x in range(infoCount):
address = get_process().ReadUnsignedFromMemory(info, readSize, error)
if not error.Success():
print("[-] error: failed to read address from info structure" + error)
return
string_ptr = get_process().ReadUnsignedFromMemory(info+readSize, readSize, error)
if not error.Success():
print("[-] error: failed to read string pointer from info structure.")
return
string = get_process().ReadCStringFromMemory(string_ptr, 1024, error)
if not error.Success():
print("[-] error: failed to read module name string.")
return
for i in modules_list:
if i == string:
hit = 1
print("[+] Hit module loading: {0} @ {1}".format(string, hex(address)))
break
# we found the module so no point continuing
# lldb stays at the gdb_image_notifier() breakpoint
# so that user can do something
if hit == 1:
return
# advance to next one
info += dyld_image_info_size
# nothing found so we resume execution
if hit == 0:
get_process().Continue()
# breakpoint on specific module
def cmd_bm(debugger, command, result, dict):
'''Set breakpoint on specific module load. Use \'bm help\' for more information.'''
help = """
Set gdb_image_notifier() or lldb_image_notifier() breakpoint on module load.
Similar to stop on shared library events feature but stops only on configured modules.
Issue the command multiple times to add different modules.
If no module path specified it will just be a shortcut to set breakpoint
at beginning of image notifier. Use \'print_images\' to show all images there.
Note: the gdb_image_notifier() was removed in Monterey.
Syntax: bm [<module full path>]
Example:
bm /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
"""
global modules_list
cmd = command.split()
if len(cmd) > 0 and cmd[0] == "help":
print(help)
return
# cmd is a list so we have problems in paths with spaces
# convert everything to a single string
# and hope the user doesn't make an error such as: bm path with spaces junk
modpath = command.split(" ", 0)
found = 0
target = get_target()
for m in target.module_iter():
# print(m.file.fullpath)
if m.file.fullpath == "/usr/lib/dyld":
for symbol in m:
# mangled is easier because the other symbol commands will retrieve with prototype info in the name
name = symbol.GetMangledName()
# XXX: improve this because we are doubling the amount of work?
# the lldb symbol isn't mangled
name2 = symbol.GetName()
if name == "_ZL18gdb_image_notifier15dyld_image_modejPK15dyld_image_info" or name2 == "lldb_image_notifier":
saddr = symbol.GetStartAddress()
# process needs to be loaded before we can execute this command...
if saddr.GetLoadAddress(target) == 0xffffffffffffffff:
print("[-] error: failed to retrieve address of gdb_image_notifier. use 'break_entrypoint' or 'process launch -s' command first and then this one.")
return
bpt_addr = saddr.GetLoadAddress(target)
# check if it's a duplicate breakpoint
# just add to the module list if the callback is already set
for bpt in target.breakpoint_iter():
# we need to iterate all locations of each breakpoint... geezzzzzz
for bl in bpt:
if bl.GetLoadAddress() == bpt_addr:
modules_list.append(modpath[0])
return
print("[+] setting breakpoint on gdb_image_notifier located at address {0}".format(hex(saddr.GetLoadAddress(target))))
breakpoint = target.BreakpointCreateByAddress(bpt_addr)
# append the module name to the list if set