On Mon, Aug 21, 2017 at 05:39:13PM +0000, Konstantin Belousov wrote: > Author: kib > Date: Mon Aug 21 17:39:12 2017 > New Revision: 322763 > URL: https://svnweb.freebsd.org/changeset/base/322763 > > Log: > Optimize libc to get and set TLS using the RDFSBASE and RDGSBASE > instructions, if supported both by CPU and kernel. > > Reviewed by: jhb (previous version) > Tested by: pho (previous version) > Sponsored by: The FreeBSD Foundation > MFC after: 3 weeks > Differential revision: https://reviews.freebsd.org/D12023 > > Added: > head/lib/libc/amd64/sys/amd64_detect_rdfsgsbase.c (contents, props > changed) > head/lib/libc/amd64/sys/amd64_detect_rdfsgsbase.h (contents, props > changed) > Modified: > head/lib/libc/amd64/sys/Makefile.inc > head/lib/libc/amd64/sys/amd64_get_fsbase.c > head/lib/libc/amd64/sys/amd64_get_gsbase.c > head/lib/libc/amd64/sys/amd64_set_fsbase.c > head/lib/libc/amd64/sys/amd64_set_gsbase.c
Hey kib, This commit breaks booting in UEFI mode under bhyve. The VM gets stuck when the kernel launches /sbin/init. Here's a screenshot of a verbose boot at a recent HEAD: https://imgur.com/PiJhfll Note, the screenshot depicts HardenedBSD, not FreeBSD. Another user attempting to boot a recent vanilla FreeBSD 12-CURRENT/amd64 snapshot reported to me the same behavior, though, so the issue is certainly not specific to HardenedBSD. Reverting just this commit enabled booting in a bhyve VM again. Thanks, -- Shawn Webb Cofounder and Security Engineer HardenedBSD GPG Key ID: 0x6A84658F52456EEE GPG Key Fingerprint: 2ABA B6BD EF6A F486 BE89 3D9E 6A84 658F 5245 6EEE
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