HardenedBSD/sys/amd64/cloudabi32
Dmitry Chagin de8374df28 fork: Allow ABI to specify fork return values for child.
At least Linux x86 ABI's does not use carry bit and expects that the dx register
is preserved. For this add a new sv_set_fork_retval hook and call it from cpu_fork().

Add a short comment about touching dx in x86_set_fork_retval(), for more details
see phab comments from kib@ and imp@.

Reviewed by:		kib
Differential revision:	https://reviews.freebsd.org/D31472
MFC after:		2 weeks
2021-08-12 11:45:25 +03:00
..
cloudabi32_sysvec.c fork: Allow ABI to specify fork return values for child. 2021-08-12 11:45:25 +03:00