Date: Fri, 6 Jun 1997 21:36:11 -0700 (PDT) From: Bruce Evans <bde@FreeBSD.ORG> To: cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG, cvs-sys@FreeBSD.ORG Subject: cvs commit: src/sys/i386/include md_var.h pcb.h reg.h src/sys/i386/i386 genassym.c machdep.c swtch.s trap.c Message-ID: <199706070436.VAA21703@freefall.freebsd.org>
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bde 1997/06/06 21:36:11 PDT
Modified files:
sys/i386/include md_var.h pcb.h reg.h
sys/i386/i386 genassym.c machdep.c swtch.s trap.c
Log:
Preserve %fs and %gs across context switches. This has a relatively low
cost since it is only done in cpu_switch(), not for every exception.
The extra state is kept in the pcb, and handled much like the npx state,
with similar deficiencies (the state is not preserved across signal
handlers, and error handling loses state).
Revision Changes Path
1.14 +3 -1 src/sys/i386/include/md_var.h
1.22 +4 -2 src/sys/i386/include/pcb.h
1.15 +13 -1 src/sys/i386/include/reg.h
1.47 +3 -1 src/sys/i386/i386/genassym.c
1.247 +9 -1 src/sys/i386/i386/machdep.c
1.52 +13 -1 src/sys/i386/i386/swtch.s
1.99 +20 -1 src/sys/i386/i386/trap.c
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