CVS commit: src/sys/arch

["Maxime Villard" <maxv%netbsd.org@localhost>]

Module Name:    src
Committed By:   maxv
Date:           Sat Oct 21 06:55:54 UTC 2017

Modified Files:
        src/sys/arch/amd64/acpi: acpi_wakeup_low.S
        src/sys/arch/amd64/amd64: locore.S machdep.c
        src/sys/arch/x86/x86: sys_machdep.c

Log Message:
Improve our segregs model. Pass 3/3.

Treat %gs the same way we treat %ds/%es/%fs: restore it in INTRFASTEXIT
on 32bit LWPs.

On Xen however, its behavior does not change, because we need to do an
hypercall before INTR_RESTORE_GPRS, and that's too complicated for now.

As a side effect, this change fixes a bug in the ACPI wakeup code; %fs/%gs
were not restored on 32bit LWPs, and chances are they would segfault
shortly afterwards.

Support for USER_LDT on amd64 is almost complete now.


To generate a diff of this commit:
cvs rdiff -u -r1.7 -r1.8 src/sys/arch/amd64/acpi/acpi_wakeup_low.S
cvs rdiff -u -r1.136 -r1.137 src/sys/arch/amd64/amd64/locore.S
cvs rdiff -u -r1.271 -r1.272 src/sys/arch/amd64/amd64/machdep.c
cvs rdiff -u -r1.41 -r1.42 src/sys/arch/x86/x86/sys_machdep.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.