3.10.1. lx-ps
List all processes:
lx-ps
Sample output:
0xffff88000ed08000 1 init 0xffff88000ed08ac0 2 kthreadd
The second and third fields are obviously PID and process name.
The first one is more interesting, and contains the address of the task_struct in memory.
This can be confirmed with:
p ((struct task_struct)*0xffff88000ed08000
which contains the correct PID for all threads I’ve tried:
pid = 1,
TODO get the PC of the kthreads: https://stackoverflow.com/questions/26030910/find-program-counter-of-process-in-kernel Then we would be able to see where the threads are stopped in the code!
On ARM, I tried:
task_pt_regs((struct thread_info *)((struct task_struct)*0xffffffc00e8f8000))->uregs[ARM_pc]
but task_pt_regs is a #define and GDB cannot see defines without -ggdb3: https://stackoverflow.com/questions/2934006/how-do-i-print-a-defined-constant-in-gdb which are apparently not set?
Bibliography: