1 files changed, 64 insertions, 0 deletions
diff --git a/tools/guest-diag/bpz21.py b/tools/guest-diag/bpz21.py
new file mode 100644
index 0000000..f9809a7
--- /dev/null
+++ b/tools/guest-diag/bpz21.py
@@ -0,0 +1,64 @@
+# 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