1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
#!/usr/bin/env python3
"""Name an SMN address from the NV22_A0 memory map.
No hardware access whatsoever -- this is a lookup table, and is the safe way to
get value out of a memory map. FINDING-NO-PSP-MEMORY-APERTURE.md left several
decoding SMN bases recorded as "small, unidentified"; a naming dictionary turns
those into leads without touching the card.
python3 smn_name.py 0x1300000 0x10100000 ...
python3 smn_name.py --block MP_MP0MMU
The map is NV22_A0 and the card is NV31, so a name is a HYPOTHESIS about what
lives at an address, never a confirmation. Anything acted on must be checked
against the card in small batches with a health check, per the rule in
FINDING-NO-PSP-MEMORY-APERTURE.md.
"""
import os
import sys
MAP = os.path.expanduser("~/nv22_a0_memmap.txt")
def load():
rows = []
with open(MAP) as fh:
for line in fh:
if line.startswith("#"):
continue
p = line.split()
if len(p) < 4 or not p[0].startswith("0x"):
continue
try:
addr = int(p[0], 16)
except ValueError:
continue
rows.append((addr, p[2], p[3]))
return rows
def name_at(rows, addr, window=0x10000):
exact = [r for r in rows if r[0] == addr]
if exact:
return exact, 0
near = [r for r in rows if 0 <= addr - r[0] < window]
if not near:
return [], None
best = max(r[0] for r in near)
return [r for r in near if r[0] == best], addr - best
def main():
rows = load()
args = sys.argv[1:]
if not args:
print(__doc__)
return 2
if args[0] == "--block":
pref = args[1].upper()
seen = set()
for a, kind, nm in sorted(rows):
base = nm.split(".")[0].upper()
if base.startswith(pref) and nm not in seen:
seen.add(nm)
print(" %#010x %-6s %s" % (a, kind, nm))
return 0
for s in args:
addr = int(s, 0)
hits, delta = name_at(rows, addr)
if not hits:
print("%#012x : no NV22 row within 64K below it" % addr)
continue
tag = "exact" if delta == 0 else "base+%#x" % delta
names = sorted({h[2].split("[")[0] for h in hits})
print("%#012x : %-10s %s" % (addr, tag, ", ".join(names[:4])))
return 0
if __name__ == "__main__":
sys.exit(main())
|
