Examining mmaped addresses using GDB

Question

I\'m using the driver I posted at Direct Memory Access in Linux to mmap some physical ram into a userspace address. However, I can\'t use GDB to look at any of the address;

Answer 1

If you open an AF_PACKET socket and mmap it, gdb can't access this memory. So there isn't a problem with your driver. It's either a problem with ptrace or with gdb.