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#!/usr/bin/env python3
"""Does the SYS_DRV 0x101D wedge depend on the session index?
sub_E1F6C4 calls sub_E0E7B8(a2) first, and that function does its entire crypto chain only
when `a1 < 0x20`; at or above 32 it returns 0 immediately. If a2 is the session index, then
invoking AUC cmd 6 from a session >= 0x20 should SKIP that chain.
Prediction if the hang lives in that chain: low session id wedges, high session id does not.
Prediction if the hang is elsewhere: both wedge.
Method: burn sessions with repeated loads until the session id is >= 0x20, then load AUC and
invoke cmd 6. A wedge kills the card, so the high-id case is tried FIRST.
"""
import glob, struct, sys, time
from tinygrad import Device
import tinygrad.runtime.autogen.am.am as am
adev = Device["AMD"].iface.dev_impl; psp = adev.psp
def alloc(n):
pa = adev.mm.palloc(n, align=0x1000, zero=True, boot=False); return pa, adev.paddr2mc(pa)
def load(blob):
ap_, amc = alloc(0x80000); cp, cmc = alloc(0x8000)
n=(len(blob)+3)&~3
adev.vram.view(ap_,n)[:] = blob + b'\x00'*(n-len(blob)); adev.gmc.flush_hdp()
c=am.struct_psp_gfx_cmd_resp(cmd_id=am.GFX_CMD_ID_LOAD_TA); t=c.cmd.cmd_load_ta
t.app_phy_addr_lo,t.app_phy_addr_hi=amc&0xFFFFFFFF,amc>>32; t.app_len=len(blob)
t.cmd_buf_phy_addr_lo,t.cmd_buf_phy_addr_hi=cmc&0xFFFFFFFF,cmc>>32; t.cmd_buf_len=0x8000
try:
r=psp._ring_submit(c); return r.resp.status&0xFFFFFFFF, r.resp.session_id, cp
except Exception as e:
try: return int(str(e).strip().split()[-1])&0xFFFFFFFF,None,cp
except Exception: return -1,None,cp
def invoke(sid, shm, cid):
buf=bytearray(0x2000); struct.pack_into('<I',buf,0,cid)
adev.vram.view(shm,len(buf))[:]=bytes(buf); adev.gmc.flush_hdp()
c=am.struct_psp_gfx_cmd_resp(cmd_id=am.GFX_CMD_ID_INVOKE_CMD)
iv=c.cmd.cmd_invoke_cmd; iv.session_id, iv.ta_cmd_id = sid, cid
t0=time.time()
try:
r=psp._ring_submit(c); st=r.resp.status&0xFFFFFFFF
except Exception as e:
try: st=int(str(e).strip().split()[-1])&0xFFFFFFFF
except Exception: st=-1
return st, time.time()-t0
auc=open(glob.glob('/root/psp/contall/ta_16-0-0-9_9e9044cf*')[0],'rb').read()
csu=open(glob.glob('/root/psp/contall/ta_42-0-0-6_1c874c3c*')[0],'rb').read()
# burn sessions with CSU (verified clean) until the next session id is high
last=None
for i in range(20):
st,sid,shm = load(csu)
if st!=0 or sid is None: print(' burn stopped at i=%d st=%#x'%(i,st)); break
last=sid
print('burned sessions, last CSU sid=%s'%last)
st,sid,shm = load(auc)
print('AUC load st=%#x sid=%s'%(st,sid))
if st==0 and sid is not None:
s,dt = invoke(sid, shm, 6)
print(' AUC cmd6 at sid=%d -> status %#x %.1fs %s'%(sid,s,dt,'WEDGE' if dt>5 else 'NO WEDGE'))
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