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import gdb, sys
inf = gdb.selected_inferior()
pid = inf.pid
base = None
for line in open("/proc/%d/maps" % pid):
if "libnvidia-eglcore.so.570.144" in line:
parts = line.split()
lo, hi = [int(x, 16) for x in parts[0].split('-')]
off = int(parts[2], 16)
if off == 0:
base = lo
break
if base is None:
print("EGLBASE not found")
gdb.execute("detach")
sys.exit(1)
print("EGLBASE 0x%x PID %d" % (base, pid))
def rd(a, n):
return inf.read_memory(a, n).tobytes()
def u32(a):
return int.from_bytes(rd(a, 4), 'little')
def u64(a):
return int.from_bytes(rd(a, 8), 'little')
state = {"out": 0, "E": 0, "S": 0, "armed150": False, "armedS": False,
"bt_done": False, "post_done": False}
class B(gdb.Breakpoint):
def __init__(self, spec, fn, limit=100000):
super().__init__(spec, internal=False)
self.fn = fn; self.limit = limit; self.hits = 0
self.silent = True
def stop(self):
self.hits += 1
try:
stop = bool(self.fn(self))
except Exception as e:
print("ERR@0x%x %s" % (int(gdb.parse_and_eval("$pc")), e))
stop = False
return stop or self.hits >= self.limit
def a97(bp):
rbp = int(gdb.parse_and_eval("$rbp"))
r14 = int(gdb.parse_and_eval("$r14"))
out = u64(rbp+0x10)
state["out"] = out
q = rd(out, 0x28)
rec_ptr = int.from_bytes(q[8:16], 'little')
print("A97 out=0x%x count=%d f10=%08x f20=%08x f24=%08x recp=0x%x" %
(out, int.from_bytes(q[0:4], 'little'), int.from_bytes(q[0x10:0x14], 'little'),
int.from_bytes(q[0x20:0x24], 'little'), int.from_bytes(q[0x24:0x28], 'little'), rec_ptr))
if rec_ptr and rec_ptr > 0x1000:
try:
rec = rd(rec_ptr, 16)
print("A97 rec=%08x %08x %08x %08x" %
tuple(int.from_bytes(rec[i*4:i*4+4], 'little') for i in range(4)))
except Exception as e:
print("A97 rec-unreadable", e)
return False
def post(bp):
if state["post_done"]:
return False
state["post_done"] = True
rsp = int(gdb.parse_and_eval("$rsp"))
q = rd(rsp, 0x40)
print("POST rsp=0x%x out=0x%x" % (rsp, state["out"]))
for i in range(0, 0x40, 8):
v = int.from_bytes(q[i:i+8], 'little')
print("POST rsp+%02x = 0x%016x" % (i, v))
if state["out"]:
oq = rd(state["out"], 0x40)
for i in range(0, 0x40, 8):
v = int.from_bytes(oq[i:i+8], 'little')
print("POST out+%02x = 0x%016x" % (i, v))
return False
def t150(bp):
rbp = int(gdb.parse_and_eval("$rbp"))
if not state.get("vt_done"):
state["vt_done"] = True
rdi = u64(rbp+0x148)
vt = u64(rdi) if rdi else 0
m118 = u64(vt+0x118) if vt else 0
m170 = u64(vt+0x170) if vt else 0
print("VT E148=0x%x vt=0x%x m118=0x%x m170=0x%x" % (rdi, vt, m118, m170))
if not state.get("eng_done"):
state["eng_done"] = True
n = u32(rbp+8)
ids = [u32(rbp+0x54+i*4) for i in range(min(n,8))]
print("ENG n=%d ids=%s" % (n, ",".join("0x%x" % x for x in ids)))
# cfg area pointer is rip-relative 0x2019320 at runtime = base + (0x2019320 - 0)
# eglcore base == min load addr; file offset == vaddr for the .text; data seg present?
try:
vals = rd(base + 0x2019320 + 0xf80, 0xe0)
for i in range(0, 0xe0, 0x10):
v4 = [int.from_bytes(vals[i+j:i+j+4],'little') for j in (0,4,8,12)]
print("CFG +0x%03x = %s" % (0xf80+i, ["0x%x"%x for x in v4]))
except Exception as e:
print("CFG dump err", e)
v = u32(rbp+0x150)
b38 = rd(rbp+0x1b038, 1)[0]; b39 = rd(rbp+0x1b039, 1)[0]
p = u64(rbp+0x1b030); s8 = u64(p+8) if p else 0
print("T150 E=0x%x v=0x%08x b038=%d b039=%d p=0x%x p8=0x%x" %
(rbp, v, b38, b39, p, s8))
if not state["bt_done"]:
state["bt_done"] = True
print(gdb.execute("bt 8", to_string=True))
if not state["armed150"]:
state["armed150"] = True
state["E"] = rbp
try:
gdb.execute("frame 1")
S = int(gdb.parse_and_eval("$rbp"))
gdb.execute("frame 0")
print("S=0x%x S120=%08x S128=%08x" % (S, u32(S+0x120), u32(S+0x128)))
state["S"] = S
except Exception as e:
print("S capture err", e)
S = 0
W("*(unsigned int *)0x%x" % (rbp+0x150), rbp, 0x150, 4, "W150")
W("*(unsigned char *)0x%x" % (rbp+0x1b038), rbp, 0x1b038, 1, "W038")
W("*(unsigned char *)0x%x" % (rbp+0x1b039), rbp, 0x1b039, 1, "W039")
if S:
W("*(unsigned int *)0x%x" % (S+0x120), S, 0x120, 4, "W120")
print("WATCHES armed E=0x%x S=0x%x" % (rbp, S))
return False
def sl(bp):
rbp = int(gdb.parse_and_eval("$rbp"))
print("SLOOP S=0x%x S120=%08x" % (rbp, u32(rbp+0x120)))
if not state["armedS"]:
state["armedS"] = True
W("*(unsigned int *)0x%x" % (rbp+0x120), rbp, 0x120, 4, "W120")
print("W120 armed on S+0x120")
return False
class W(gdb.Breakpoint):
def __init__(self, spec, E, off, size, tag):
super().__init__(spec, type=gdb.BP_WATCHPOINT)
self.silent = True; self.E = E; self.off = off; self.size = size
self.tag = tag; self.hits = 0
def stop(self):
self.hits += 1
cur = int.from_bytes(rd(self.E+self.off, self.size), 'little')
pc = int(gdb.parse_and_eval("$pc"))
print("%s v=0x%x pc=0x%x (rel 0x%x)" % (self.tag, cur, pc, pc-base))
if self.hits <= 8:
print(gdb.execute("bt 10", to_string=True))
return self.hits >= 400
B("*0x%x" % (base+0xecd43d), a97, 220)
B("*0x%x" % (base+0xd5e4d3), post, 100000)
B("*0x%x" % (base+0xd5e449), t150, 220)
B("*0x%x" % (base+0xd6ef76), sl, 240)
try:
gdb.execute("continue")
except gdb.error as e:
print("CONT-ERR %s" % e)
print("TRACE-END")
try:
gdb.execute("detach")
except gdb.error as e:
print("DETACH-ERR %s" % e)
gdb.execute("quit")
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