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import gdb
gr = gdb.execute
inf = gdb.selected_inferior()
pid = inf.pid
base = None
for line in open("/proc/%d/maps" % pid):
parts = line.split()
try:
lo, hi = [int(x,16) for x in parts[0].split('-')]
except Exception:
continue
if base is None and "libnvidia-eglcore" in line and int(parts[2],16) == 0:
base = lo
print("BASE 0x%x PID %d" % (base or 0, pid))
def u64(a): return int(gdb.parse_and_eval("*(unsigned long*)0x%x" % a))
def u32(a): return int(gdb.parse_and_eval("*(unsigned int*)0x%x" % a))
state = {"chits":0, "cleared":0}
class BC(gdb.Breakpoint):
def __init__(self):
super().__init__("*0x%x" % (base + 0xB33D30), internal=False)
self.silent = True
def stop(self):
state["chits"] += 1
try:
obj = int(gdb.parse_and_eval("$rdi"))
n = int(gdb.parse_and_eval("$rsi"))
cnt = u32(obj + 0x22efc)
for i in range(0, min(cnt, 32)):
p = u64(obj + 0x1428 + i*8)
if not p:
continue
tgt = p + n * 0x10
try:
v16 = int(gdb.parse_and_eval("*(unsigned short*)0x%x" % (tgt + 0xe)))
if v16 == 0xffff:
gr("set {unsigned short}0x%x = 0" % (tgt + 0xe))
gr("set {unsigned int}0x%x = 0" % tgt)
gr("set {unsigned short}0x%x = 0" % (tgt + 0xc))
state["cleared"] += 1
print("CLEAR#%d obj=0x%x n=0x%x tgt=0x%x" % (state["cleared"], obj, n, tgt), flush=True)
except Exception:
pass
except Exception as e:
if state["chits"] <= 4:
print("chitfail %s" % e, flush=True)
if state["cleared"] >= 24:
self.enabled = False
print("BC-DISABLED", flush=True)
return False
try:
BC(); print("BPS-SET", flush=True)
gr("continue")
except Exception as e:
print("bpfail %s" % e, flush=True)
print("T101-DONE chits=%d cleared=%d" % (state["chits"], state["cleared"]), flush=True)
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