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<blockquote style="position: relative; padding-left: 55px;"><section><a href="https://social.hackerspace.pl/users/q3k/statuses/115697979747058363">q3k :blobcatcoffee: (q3k@social.hackerspace.pl)'s status on Thursday, 11-Dec-2025 09:04:33 JST</a><a href="https://social.hackerspace.pl/@q3k" title="q3k@social.hackerspace.pl"><img src="https://gnusocial.jp/avatar/88259-48-20230114192528.webp" width="48" height="48" alt="q3k :blobcatcoffee:" style="position: absolute; left: 0; top: 0;">q3k :blobcatcoffee:</a><div><a href="https://social.hackerspace.pl/@q3k/115697953962890668" rel="in-reply-to">in reply to</a></div></section><article><p>I've never blackbox-reverse a PCIe device before... But I guess there's a first time for everything.</p></article><footer><a rel="bookmark" href="https://gnusocial.jp/conversation/5942353#notice-11687197">In conversation</a><time datetime="2025-12-11T09:04:33+09:00" title="Thursday, 11-Dec-2025 09:04:33 JST">about 3 months ago</time> <span>from <span><a href="https://social.hackerspace.pl/@q3k/115697979747058363" rel="external" title="Sent from social.hackerspace.pl via ActivityPub">social.hackerspace.pl</a></span></span><a href="https://social.hackerspace.pl/@q3k/115697979747058363">permalink</a><h4>Attachments</h4><ol><li><label><a rel="external" href="https://gnusocial.jp/attachment/5548820">Terminal:[nix-shell:~]# cat test.py 
import mmap
import osf = os.open("/dev/mem", os.O_RDWR | os.O_SYNC)
memory = mmap.mmap(f, length=16&lt;&lt;20, flags=mmap.MAP_SHARED, offset=0xfb000000)
for i in range(128):
    w = memory[i*4:(i+1)*4]
    if w != bytes([0,0,0,0]):
        print(i, w)[nix-shell:~]# python3 test.py 
0 b'\xdc\xbc\x1b\xcf'
1 b'\x01\x00\x00\x00'
2 b'\x02\x00\x00\x00'
7 b'\x00\x10\x00\x00'
8 b'\x00\x10\x00\x00'
24 b'C\x00\x00\x00'
25 b'*\x00\x00\x00'
26 b'*\x00\x00\x00'
27 b'(\x00\x00\x00'
28 b'(\x00\x00\x00'
64 b'1.1.'
65 b'13\x00\x00'
80 b'2019'
81 b'-05-'
82 b'06T1'
83 b'1:44'
84 b':06\x00'
88 b'load'
89 b'er\x00\x00'
96 b'\x01\x00\x00\x00'
97 b'\x01\x00\x00\x00'
98 b'\r\x00\x00\x00'[nix-shell:~]#</a></label><br><a href="https://object.ceph-waw3.hswaw.net/mastodon-prod/media_attachments/files/115/697/977/023/271/652/original/b0420dd5858626bb.png" rel="external">https://object.ceph-waw3.hswaw.net/mastodon-prod/media_attachments/files/115/697/977/023/271/652/original/b0420dd5858626bb.png</a></li></ol></footer></blockquote>

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q3k :blobcatcoffee: (q3k@social.hackerspace.pl)'s status on Thursday, 11-Dec-2025 09:04:33 JST q3k :blobcatcoffee:
in reply to
I've never blackbox-reverse a PCIe device before... But I guess there's a first time for everything.
In conversationabout 3 months ago from social.hackerspace.plpermalink
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1. Terminal: [nix-shell:~]# cat test.py import mmap import os f = os.open("/dev/mem", os.O_RDWR | os.O_SYNC) memory = mmap.mmap(f, length=16<<20, flags=mmap.MAP_SHARED, offset=0xfb000000) for i in range(128): w = memory[i*4:(i+1)*4] if w != bytes([0,0,0,0]): print(i, w) [nix-shell:~]# python3 test.py 0 b'\xdc\xbc\x1b\xcf' 1 b'\x01\x00\x00\x00' 2 b'\x02\x00\x00\x00' 7 b'\x00\x10\x00\x00' 8 b'\x00\x10\x00\x00' 24 b'C\x00\x00\x00' 25 b'*\x00\x00\x00' 26 b'*\x00\x00\x00' 27 b'(\x00\x00\x00' 28 b'(\x00\x00\x00' 64 b'1.1.' 65 b'13\x00\x00' 80 b'2019' 81 b'-05-' 82 b'06T1' 83 b'1:44' 84 b':06\x00' 88 b'load' 89 b'er\x00\x00' 96 b'\x01\x00\x00\x00' 97 b'\x01\x00\x00\x00' 98 b'\r\x00\x00\x00' [nix-shell:~]#
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