33.9.1. GDB builtin CPU simulator userland
Since I had this compiled, I also decided to try it out on userland.
I was also able to run a freestanding Linux userland example on it: https://github.com/cirosantilli/arm-assembly-cheat/blob/cd232dcaf32c0ba6399b407e0b143d19b6ec15f4/v7/linux/hello.S
It just ignores the ARM SVC instruction however, and does not forward syscalls to the host like QEMU does.
Then I tried a glibc example: https://github.com/cirosantilli/arm-assembly-cheat/blob/cd232dcaf32c0ba6399b407e0b143d19b6ec15f4/v7/mov.S
First it wouldn’t break, so I added -static to the Makefile, and then it started failing with:
Unhandled v6 thumb insn
Doing:
help architecture
shows ARM version up to armv6, so maybe armv6 is not implemented?