gem5 aarch64 gdb step debug fails with "Remote 'g' packet reply is too long" somewhere after LKMC v3.0

[cirosantilli]

At LKMC v3.0 it was working after it was fixed in gem5 previously:

./run -aA -eg -b baremetal/hello.c --wait-gdb
./run-gdb -aA -eg -b baremetal/hello.c main

but later at LKMC 9f8303e it wasn't anymore:

./run -aA -eg -b baremetal/hello.c --gdb

Edit: bisected down to gem5 c4cc3145cd1eeed236b5cd3f7b2424bc0761878e SVE merge.

[cirosantilli]

Fixed at https://gem5-review.googlesource.com/c/public/gem5/+/20468 gem5 36a575071cd460255ca67ec5bdd6862d9c164919 and merged into LKMC fa877e19d31203744aecbb252a4f0207dc7491dd