On 8/20/21 2:34 AM, Peter Maydell wrote:
On Wed, 18 Aug 2021 at 21:13, Richard Henderson
<richard.hender...@linaro.org> wrote:
We've been registering host SIGBUS, but then treating it
exactly like SIGSEGV.
Handle BUS_ADRALN via cpu_unaligned_access, but allow other
SIGBUS si_codes to continue into the host-to-guest signal
coversion code in host_signal_handler. Unwind the guest
state so that we report the correct guest PC for the fault.
You can't rely on alignment faults being marked by BUS_ADRALN:
eg MIPS doesn't give you that si_code. How much does that matter
for our use of it here ?
Aside from whatever tcg/foo relies upon, it doesn't matter.
But: silly mips. I was going to rely on it there -- oh well, I'll undo that section of the
follow-on tcg/mips patch set. And it's got a different syscall for disabling the
unaligned fixup.
r~
