bignerd_95

5 ms·

1.
by bignerd_95 9mo ago
Extraordinary! Congratulations. I’ve always been fascinated by the world of telephony. How did you manage to get numbers for every country? Do you have direct access to SS7, are you a virtual operator, or do you use third-party services for
2.
by bignerd_95 11mo ago
So you use debuggers. Good. Then you can confirm that the program counter is incremented after each instruction, and that you read assembly from top to bottom. That means smaller addresses are at the top and larger addresses are at the bott
3.
by bignerd_95 11mo ago
Please try to draw, step by step, a process where lower addresses are at the top and higher addresses are at the bottom. You’ll see that this makes everything much easier to understand. Do not confuse this with push and pop on an abstract s
4.
by bignerd_95 11mo ago
If you're referring to little-endianness, it means the CPU stores multi-byte values in memory with the least significant byte first (at the lowest address). This convention started on early Intel chips and was kept for backward compati
5.
by bignerd_95 11mo ago
Yes, I reached the same conclusions the hard way while exploiting memory corruption bugs. Once I understood how misleading these representations can be, everything finally became clear. About the address notation you're describing, I&#
6.
by bignerd_95 11mo ago
Yes, I draw the heap starting at the top of the board and the stack starting at the bottom of the board and grow them toward each other. That works fine in a one-off explanation. The problem is that most textbooks draw the opposite, so the
7.
by bignerd_95 11mo ago
Thanks! I tried to rewrite the final sentence
8.
by bignerd_95 11mo ago
As someone who teaches this stuff at university, I see students getting confused every single year by how textbooks draw memory. The problem is mostly visual, not conceptual. Most diagrams in books and slides use an old hardware-centric con
9.
by bignerd_95 11mo ago
Nice project! Another route you might consider is flashing a small custom firmware on the Grandstream HT80x so the logic runs directly on the ATA instead of on the Pi/Asterisk side. I wrote a tool that can extract and repack Grandstrea