33.9. GDB builtin CPU simulator
It is incredible, but GDB also has a CPU simulator inside of it as documented at: https://sourceware.org/gdb/onlinedocs/gdb/Target-Commands.html
TODO: any advantage over QEMU? I doubt it, mostly using it as as toy for now:
Without running ./run, do directly:
./run-gdb --arch arm --baremetal userland/c/hello.c --sim
Then inside GDB:
load starti
and now you can debug normally.
Enabled with the crosstool-NG configuration:
CT_GDB_CROSS_SIM=y
which by grepping crosstool-NG we can see does on GDB:
./configure --enable-sim
Those are not set by default on gdb-multiarch in Ubuntu 16.04.
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