I'm practicing reversing a stripped arm binary, and found that when I set a breakpoint at say
0x010451, and run the program, gdb spins forever until I hit ctrl+c. When I do, the current pc is at the address, but I can't continue the program.
When I set the breakpoint to
0x010450, gdb hits the breakpoint fine, but the instructions are being decoded as non-thumb instructions.
Is this expected? A bug? I will try to upload examples later today.
Version info (under qemu usermode emulation):
debian@debian-arm:~/lab$ gdb --version GNU gdb (Debian 8.2.1-2+b3) 8.2.1 Copyright (C) 2018 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. debian@debian-arm:~/lab$ uname -a Linux debian-arm 4.19.0-10-armmp-lpae #1 SMP Debian 4.19.132-1 (2020-07-24) armv7l GNU/Linux