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# SPDX-License-Identifier: BSD-3-Clause
# Copyright (c) 2026 Open-IOV contributors
# gdb script: dump param_2[] at FUN_00337e60 entry when called from
# FUN_00550ff0 (file 0x450ff0). bpz20 showed FUN_00550ff0 -> FUN_00337e60
# overwrites ds+0xe94 with param_2[0x23]; on the host that is 0x18 (24 TPC).
# Launch under gdb (device init runs during cuInit).
import gdb
import time
gdb.execute("set pagination off")
gdb.execute("set confirm off")
gdb.execute("set environment CDT_PAUSE=60")
gdb.execute("set environment CDT_HOLD=900")
gdb.execute("catch load libcuda.so")
gdb.execute("run")
out = gdb.execute("info proc mappings", to_string=True)
base = None
for line in out.splitlines():
if "libcuda" in line and "r-xp" in line:
f = line.split()
base = int(f[0], 16) - int(f[3], 16)
break
print("BASE=0x%x" % (base or 0))
if base is None:
raise SystemExit
def rd(addr, n=4, fmt="unsigned int"):
try:
return int(gdb.parse_and_eval("*(%s*)0x%x" % (fmt, addr))) & ((1 << (8 * n)) - 1)
except Exception:
return None
CALL_LO, CALL_HI = base + 0x450ff0, base + 0x451770
gdb.execute("break *0x%x" % (base + 0x237e60))
gdb.execute("break *0x%x" % (base + 0x2e3e80))
CALLER_RET = base + 0xd0eae1
t0 = time.time()
for hit in range(400):
try:
gdb.execute("continue")
except gdb.error as e:
print("CONTINUE_END %s" % e)
break
rip = int(gdb.parse_and_eval("$rip")) & 0xffffffffffffffff
if rip == base + 0x2e3e80:
ret = rd(int(gdb.parse_and_eval("$rsp")), 8, "unsigned long")
if ret != CALLER_RET:
continue
rdi = int(gdb.parse_and_eval("$rdi")) & 0xffffffffffffffff
ds = rd(rdi + 0x40, 8, "unsigned long")
print("TERMINATOR t=%.3f ds=0x%x e94=0x%x" % (time.time() - t0, ds or 0, rd(ds + 0xe94) or 0))
break
ret = rd(int(gdb.parse_and_eval("$rsp")), 8, "unsigned long")
if not (CALL_LO <= ret < CALL_HI):
continue
rsi = int(gdb.parse_and_eval("$rsi")) & 0xffffffffffffffff
d = [rd(rsi + 4 * k) for k in range(0x30)]
print("FUN_00550ff0->FUN_00337e60 t=%.3f caller=+0x%x p2[0x23]=0x%x" %
(time.time() - t0, ret - base, d[0x23] or 0))
print(" dwords[0..0x30]:", [hex(x or 0) for x in d])
break
try:
gdb.execute("detach")
except Exception:
pass
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