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import gdb, sys
inf = gdb.selected_inferior()
pid = inf.pid
cands = []
for line in open("/proc/%d/maps" % pid):
if "nvidiactl" in line and "rw-s" in line:
parts = line.split()
try:
lo, hi = [int(x,16) for x in parts[0].split('-')]
except Exception:
continue
if hi - lo == 0x4000:
cands.append(lo + 0x80)
print("CANDIDATES %s" % ["0x%x" % c for c in cands])
class W(gdb.Breakpoint):
def __init__(self, addr):
super().__init__("*(unsigned int*)0x%x" % addr, gdb.BP_WATCHPOINT, gdb.WP_READ, internal=False)
self.addr = addr
self.silent = True
def stop(self):
print("READWORD 0x%x" % self.addr)
return True
armed = 0
for c in cands:
try:
W(c); armed += 1
except Exception as e:
print("watchfail 0x%x: %s" % (c, e))
print("ARMED %d" % armed)
if armed:
gdb.execute("continue")
print("T80R-DONE")
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