Trigger breakpoints before beginning translation of a TB
that would begin with a BP. Thus we never generate code
for the BP at all.
Single-step instructions within a page containing a BP so
that we are sure to check each insn for the BP as above.
We no longer need to flush any TBs when changing BPs.
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/286
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/404
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/489
Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
10c37828b2