mirror of
https://github.com/AsahiLinux/m1n1
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112 lines
3.1 KiB
Python
112 lines
3.1 KiB
Python
# SPDX-License-Identifier: MIT
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import re
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from construct import *
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DebuggerState = Struct(
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"panic_options" / Hex(Int64ul),
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"current_op" / Hex(Int32ul),
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"proceed_on_sync_failre" / Int32ul,
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"message" / Hex(Int64ul),
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"panic_str" / Hex(Int64ul),
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"panic_args" / Hex(Int64ul),
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"panic_data_ptr" / Hex(Int64ul),
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"panic_caller" / Hex(Int64ul),
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"entry_count" / Hex(Int32ul),
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"kern_return" / Hex(Int32sl)
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)
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# Darwin va_list is just a stack pointer...
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VaList = Struct(
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"stack" / Hex(Int64ul),
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)
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def decode_debugger_state(u, ctx):
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p = u.proxy
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iface = u.iface
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def hv_readmem(addr, size):
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addr = p.hv_translate(addr, False, False)
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assert addr != 0
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return iface.readmem(addr, size)
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p_state = p.hv_translate(ctx.regs[23], False, False)
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assert p_state != 0
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di = iface.readstruct(p_state, DebuggerState)
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print(di)
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message = hv_readmem(di.message, 1024).split(b"\x00")[0].decode("ascii")
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print()
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print(f"Message: {message}")
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print("===== Panic string =====")
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decode_panic(u, di.panic_str, di.panic_args)
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print("========================")
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def decode_panic_call(u, ctx):
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decode_panic(u, ctx.regs[0], ctx.regs[1])
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def decode_panic(u, p_string, p_args):
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p = u.proxy
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iface = u.iface
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def hv_readmem(addr, size):
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addr = p.hv_translate(addr, False, False)
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assert addr != 0
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return iface.readmem(addr, size)
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string = hv_readmem(p_string, 1024).split(b"\x00")[0].decode("ascii")
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p_args = p.hv_translate(p_args, False, False)
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args = iface.readstruct(p_args, VaList)
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stack = hv_readmem(args.stack, 504)
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def va_arg(t):
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nonlocal stack
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d, stack = stack[:8], stack[8:]
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return t.parse(d)
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utypes = {
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"hh": Int8ul,
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"h": Int16ul,
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None: Int32ul,
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"l": Int64ul,
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"ll": Int64ul,
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"q": Int64ul,
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"s": Int64ul,
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"t": Int64ul,
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}
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stypes = {
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"hh": Int8sl,
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"h": Int16sl,
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None: Int32sl,
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"l": Int64sl,
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"ll": Int64sl,
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"q": Int64sl,
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"s": Int64sl,
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"t": Int64sl,
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}
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#print(string)
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def format_arg(match):
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pat, flags, width, mod, conv = match.group(0, 1, 2, 3, 4)
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if conv == "%":
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return "%"
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elif conv == "s":
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return hv_readmem(va_arg(Int64ul), 1024).split(b"\x00")[0].decode("ascii")
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elif conv in "di":
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v = va_arg(stypes[mod])
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return f"%{flags or ''}{width or ''}{conv or ''}" % v
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elif conv in "ouxX":
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v = va_arg(utypes[mod])
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return f"%{flags or ''}{width or ''}{conv or ''}" % v
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elif conv in "p":
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return f"0x{va_arg(Int64ul):x}"
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else:
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return f"[{pat!r}:{va_arg(Int64ul):x}]"
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string = re.sub('%([-#0 +]*)([1-9][0-9]*)?(hh|h|l|ll|q|L|j|z|Z|t)?([diouxXeEfFgGaAcsCSpnm%])',
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format_arg, string)
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print(string + "\n", end="")
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