Date: Sun, 5 Apr 2009 00:08:45 GMT From: Andrew Thompson <thompsa@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 160219 for review Message-ID: <200904050008.n3508jJk044994@repoman.freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=160219 Change 160219 by thompsa@thompsa_burger on 2009/04/05 00:08:37 IFC @160218 Affected files ... .. //depot/projects/usb/src/sys/amd64/acpica/acpi_switch.S#2 integrate .. //depot/projects/usb/src/sys/amd64/acpica/acpi_wakecode.S#3 integrate .. //depot/projects/usb/src/sys/amd64/acpica/acpi_wakeup.c#4 integrate .. //depot/projects/usb/src/sys/amd64/amd64/apic_vector.S#4 integrate .. //depot/projects/usb/src/sys/amd64/amd64/cpu_switch.S#12 integrate .. //depot/projects/usb/src/sys/amd64/amd64/db_interface.c#2 integrate .. //depot/projects/usb/src/sys/amd64/amd64/db_trace.c#8 integrate .. //depot/projects/usb/src/sys/amd64/amd64/exception.S#10 integrate .. //depot/projects/usb/src/sys/amd64/amd64/genassym.c#12 integrate .. //depot/projects/usb/src/sys/amd64/amd64/machdep.c#16 integrate .. //depot/projects/usb/src/sys/amd64/amd64/mp_machdep.c#20 integrate .. //depot/projects/usb/src/sys/amd64/amd64/sys_machdep.c#2 integrate .. //depot/projects/usb/src/sys/amd64/amd64/trap.c#13 integrate .. //depot/projects/usb/src/sys/amd64/amd64/vm_machdep.c#12 integrate .. //depot/projects/usb/src/sys/amd64/ia32/ia32_exception.S#3 integrate .. //depot/projects/usb/src/sys/amd64/ia32/ia32_misc.c#1 branch .. //depot/projects/usb/src/sys/amd64/ia32/ia32_reg.c#2 integrate .. //depot/projects/usb/src/sys/amd64/ia32/ia32_signal.c#8 integrate .. //depot/projects/usb/src/sys/amd64/ia32/ia32_sigtramp.S#4 integrate .. //depot/projects/usb/src/sys/amd64/include/asmacros.h#4 integrate .. //depot/projects/usb/src/sys/amd64/include/frame.h#2 integrate .. //depot/projects/usb/src/sys/amd64/include/md_var.h#8 integrate .. //depot/projects/usb/src/sys/amd64/include/pcb.h#8 integrate .. //depot/projects/usb/src/sys/amd64/include/pcpu.h#7 integrate .. //depot/projects/usb/src/sys/amd64/include/proc.h#3 integrate .. //depot/projects/usb/src/sys/amd64/include/reg.h#3 integrate .. //depot/projects/usb/src/sys/amd64/include/segments.h#4 integrate .. //depot/projects/usb/src/sys/amd64/include/signal.h#2 integrate .. //depot/projects/usb/src/sys/amd64/include/sysarch.h#2 integrate .. //depot/projects/usb/src/sys/amd64/include/ucontext.h#2 integrate .. //depot/projects/usb/src/sys/amd64/linux32/linux32_locore.s#5 integrate .. //depot/projects/usb/src/sys/amd64/linux32/linux32_machdep.c#13 integrate .. //depot/projects/usb/src/sys/amd64/linux32/linux32_sysvec.c#17 integrate .. //depot/projects/usb/src/sys/arm/arm/locore.S#7 integrate .. //depot/projects/usb/src/sys/arm/conf/AVILA#14 integrate .. //depot/projects/usb/src/sys/arm/conf/CAMBRIA#6 integrate .. //depot/projects/usb/src/sys/arm/include/atomic.h#7 integrate .. //depot/projects/usb/src/sys/arm/include/vmparam.h#8 integrate .. //depot/projects/usb/src/sys/boot/i386/libi386/smbios.c#3 integrate .. //depot/projects/usb/src/sys/cam/cam_xpt.c#16 integrate .. //depot/projects/usb/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c#4 integrate .. //depot/projects/usb/src/sys/compat/freebsd32/freebsd32.h#6 integrate .. //depot/projects/usb/src/sys/compat/freebsd32/freebsd32_ioctl.c#2 integrate .. //depot/projects/usb/src/sys/compat/freebsd32/freebsd32_ioctl.h#2 integrate .. //depot/projects/usb/src/sys/compat/freebsd32/freebsd32_proto.h#13 integrate .. //depot/projects/usb/src/sys/compat/freebsd32/freebsd32_syscall.h#13 integrate .. //depot/projects/usb/src/sys/compat/freebsd32/freebsd32_syscalls.c#13 integrate .. //depot/projects/usb/src/sys/compat/freebsd32/freebsd32_sysent.c#13 integrate .. //depot/projects/usb/src/sys/compat/freebsd32/syscalls.master#13 integrate .. //depot/projects/usb/src/sys/compat/ia32/ia32_signal.h#3 integrate .. //depot/projects/usb/src/sys/conf/files#58 integrate .. //depot/projects/usb/src/sys/conf/files.amd64#20 integrate .. //depot/projects/usb/src/sys/conf/files.i386#22 integrate .. //depot/projects/usb/src/sys/conf/files.ia64#12 integrate .. //depot/projects/usb/src/sys/conf/files.powerpc#19 integrate .. //depot/projects/usb/src/sys/conf/newvers.sh#8 integrate .. //depot/projects/usb/src/sys/conf/options#24 integrate .. //depot/projects/usb/src/sys/contrib/dev/uath/ar5523.bin.uu#1 branch .. //depot/projects/usb/src/sys/dev/acpi_support/acpi_asus.c#11 integrate .. //depot/projects/usb/src/sys/dev/age/if_age.c#8 integrate .. //depot/projects/usb/src/sys/dev/age/if_agereg.h#2 integrate .. //depot/projects/usb/src/sys/dev/ata/ata-pci.c#13 integrate .. //depot/projects/usb/src/sys/dev/ata/ata-pci.h#16 integrate .. //depot/projects/usb/src/sys/dev/ata/ata-sata.c#3 integrate .. //depot/projects/usb/src/sys/dev/ata/chipsets/ata-ahci.c#6 integrate .. //depot/projects/usb/src/sys/dev/ata/chipsets/ata-intel.c#4 integrate .. //depot/projects/usb/src/sys/dev/ata/chipsets/ata-jmicron.c#3 integrate .. //depot/projects/usb/src/sys/dev/ata/chipsets/ata-marvell.c#5 integrate .. //depot/projects/usb/src/sys/dev/ata/chipsets/ata-nvidia.c#4 integrate .. //depot/projects/usb/src/sys/dev/ata/chipsets/ata-promise.c#4 integrate .. //depot/projects/usb/src/sys/dev/ata/chipsets/ata-serverworks.c#3 integrate .. //depot/projects/usb/src/sys/dev/ata/chipsets/ata-siliconimage.c#4 integrate .. //depot/projects/usb/src/sys/dev/ata/chipsets/ata-sis.c#5 integrate .. //depot/projects/usb/src/sys/dev/ata/chipsets/ata-via.c#4 integrate .. //depot/projects/usb/src/sys/dev/ath/if_ath.c#21 integrate .. //depot/projects/usb/src/sys/dev/ath/if_athvar.h#17 integrate .. //depot/projects/usb/src/sys/dev/drm/drm_pci.c#5 integrate .. //depot/projects/usb/src/sys/dev/drm/drm_pciids.h#8 integrate .. //depot/projects/usb/src/sys/dev/drm/r600_cp.c#3 integrate .. //depot/projects/usb/src/sys/dev/drm/radeon_cp.c#8 integrate .. //depot/projects/usb/src/sys/dev/ed/ax88x90reg.h#2 integrate .. //depot/projects/usb/src/sys/dev/ed/dl100xxreg.h#2 integrate .. //depot/projects/usb/src/sys/dev/ed/if_ed.c#6 integrate .. //depot/projects/usb/src/sys/dev/ed/if_ed_pccard.c#8 integrate .. //depot/projects/usb/src/sys/dev/ed/if_ed_wd80x3.c#2 integrate .. //depot/projects/usb/src/sys/dev/ed/if_edreg.h#2 integrate .. //depot/projects/usb/src/sys/dev/ed/if_edvar.h#3 integrate .. //depot/projects/usb/src/sys/dev/if_ndis/if_ndis.c#22 integrate .. //depot/projects/usb/src/sys/dev/ipw/if_ipw.c#9 integrate .. //depot/projects/usb/src/sys/dev/iwi/if_iwi.c#10 integrate .. //depot/projects/usb/src/sys/dev/iwn/if_iwn.c#6 integrate .. //depot/projects/usb/src/sys/dev/malo/if_malo.c#3 integrate .. //depot/projects/usb/src/sys/dev/malo/if_malo_pci.c#3 integrate .. //depot/projects/usb/src/sys/dev/malo/if_malohal.c#2 integrate .. //depot/projects/usb/src/sys/dev/mii/axphy.c#1 branch .. //depot/projects/usb/src/sys/dev/mii/axphyreg.h#1 branch .. //depot/projects/usb/src/sys/dev/mii/miidevs#12 integrate .. //depot/projects/usb/src/sys/dev/ofw/ofw_standard.c#2 integrate .. //depot/projects/usb/src/sys/dev/ofw/openfirm.c#6 integrate .. //depot/projects/usb/src/sys/dev/pccard/pccarddevs#13 integrate .. //depot/projects/usb/src/sys/dev/pccbb/pccbb_pci.c#10 integrate .. //depot/projects/usb/src/sys/dev/pci/pci.c#19 integrate .. //depot/projects/usb/src/sys/dev/powermac_nvram/powermac_nvram.c#4 integrate .. //depot/projects/usb/src/sys/dev/ral/rt2560.c#11 integrate .. //depot/projects/usb/src/sys/dev/ral/rt2560var.h#6 integrate .. //depot/projects/usb/src/sys/dev/ral/rt2661.c#11 integrate .. //depot/projects/usb/src/sys/dev/ral/rt2661var.h#5 integrate .. //depot/projects/usb/src/sys/dev/re/if_re.c#17 integrate .. //depot/projects/usb/src/sys/dev/sound/pci/hda/hdac.c#27 integrate .. //depot/projects/usb/src/sys/dev/uart/uart_cpu_powerpc.c#5 integrate .. //depot/projects/usb/src/sys/dev/usb/controller/usb_controller.c#11 integrate .. //depot/projects/usb/src/sys/dev/usb/usbdevs#52 integrate .. //depot/projects/usb/src/sys/dev/usb/wlan/if_rum.c#8 integrate .. //depot/projects/usb/src/sys/dev/usb/wlan/if_rumvar.h#5 integrate .. //depot/projects/usb/src/sys/dev/usb/wlan/if_uath.c#1 branch .. //depot/projects/usb/src/sys/dev/usb/wlan/if_uathreg.h#1 branch .. //depot/projects/usb/src/sys/dev/usb/wlan/if_uathvar.h#1 branch .. //depot/projects/usb/src/sys/dev/usb/wlan/if_ural.c#8 integrate .. //depot/projects/usb/src/sys/dev/usb/wlan/if_uralvar.h#5 integrate .. //depot/projects/usb/src/sys/dev/usb/wlan/if_zyd.c#8 integrate .. //depot/projects/usb/src/sys/dev/usb/wlan/usb_wlan.h#4 integrate .. //depot/projects/usb/src/sys/dev/wi/if_wi.c#9 integrate .. //depot/projects/usb/src/sys/dev/wpi/if_wpi.c#10 integrate .. //depot/projects/usb/src/sys/dev/xen/balloon/balloon.c#3 integrate .. //depot/projects/usb/src/sys/dev/xen/console/console.c#5 integrate .. //depot/projects/usb/src/sys/geom/geom.h#7 integrate .. //depot/projects/usb/src/sys/geom/geom_disk.c#8 integrate .. //depot/projects/usb/src/sys/geom/geom_disk.h#4 integrate .. //depot/projects/usb/src/sys/geom/geom_subr.c#10 integrate .. //depot/projects/usb/src/sys/geom/journal/g_journal.c#9 integrate .. //depot/projects/usb/src/sys/geom/mirror/g_mirror.c#6 integrate .. //depot/projects/usb/src/sys/geom/part/g_part.c#17 integrate .. //depot/projects/usb/src/sys/geom/part/g_part_ebr.c#5 integrate .. //depot/projects/usb/src/sys/geom/part/g_part_gpt.c#12 integrate .. //depot/projects/usb/src/sys/geom/part/g_part_mbr.c#8 integrate .. //depot/projects/usb/src/sys/geom/part/g_part_pc98.c#10 integrate .. //depot/projects/usb/src/sys/geom/raid3/g_raid3.c#6 integrate .. //depot/projects/usb/src/sys/geom/vinum/geom_vinum.c#4 integrate .. //depot/projects/usb/src/sys/geom/vinum/geom_vinum.h#4 integrate .. //depot/projects/usb/src/sys/geom/vinum/geom_vinum_create.c#1 branch .. //depot/projects/usb/src/sys/geom/vinum/geom_vinum_drive.c#7 integrate .. //depot/projects/usb/src/sys/geom/vinum/geom_vinum_events.c#1 branch .. //depot/projects/usb/src/sys/geom/vinum/geom_vinum_init.c#4 integrate .. //depot/projects/usb/src/sys/geom/vinum/geom_vinum_list.c#3 integrate .. //depot/projects/usb/src/sys/geom/vinum/geom_vinum_move.c#3 integrate .. //depot/projects/usb/src/sys/geom/vinum/geom_vinum_plex.c#5 integrate .. //depot/projects/usb/src/sys/geom/vinum/geom_vinum_raid5.c#3 integrate .. //depot/projects/usb/src/sys/geom/vinum/geom_vinum_raid5.h#3 integrate .. //depot/projects/usb/src/sys/geom/vinum/geom_vinum_rename.c#4 integrate .. //depot/projects/usb/src/sys/geom/vinum/geom_vinum_rm.c#5 integrate .. //depot/projects/usb/src/sys/geom/vinum/geom_vinum_share.c#4 integrate .. //depot/projects/usb/src/sys/geom/vinum/geom_vinum_share.h#2 integrate .. //depot/projects/usb/src/sys/geom/vinum/geom_vinum_state.c#3 integrate .. //depot/projects/usb/src/sys/geom/vinum/geom_vinum_subr.c#5 integrate .. //depot/projects/usb/src/sys/geom/vinum/geom_vinum_var.h#3 integrate .. //depot/projects/usb/src/sys/geom/vinum/geom_vinum_volume.c#4 integrate .. //depot/projects/usb/src/sys/i386/cpufreq/hwpstate.c#1 branch .. //depot/projects/usb/src/sys/i386/i386/machdep.c#14 integrate .. //depot/projects/usb/src/sys/i386/include/signal.h#2 integrate .. //depot/projects/usb/src/sys/i386/include/ucontext.h#2 integrate .. //depot/projects/usb/src/sys/i386/include/vmparam.h#8 integrate .. //depot/projects/usb/src/sys/i386/include/xen/xenpmap.h#3 integrate .. //depot/projects/usb/src/sys/i386/include/xen/xenvar.h#2 integrate .. //depot/projects/usb/src/sys/i386/xen/pmap.c#6 integrate .. //depot/projects/usb/src/sys/i386/xen/xen_machdep.c#8 integrate .. //depot/projects/usb/src/sys/ia64/ia32/ia32_misc.c#1 branch .. //depot/projects/usb/src/sys/kern/kern_shutdown.c#9 integrate .. //depot/projects/usb/src/sys/kern/sysv_sem.c#9 integrate .. //depot/projects/usb/src/sys/kern/vfs_cache.c#21 integrate .. //depot/projects/usb/src/sys/kern/vfs_mount.c#20 integrate .. //depot/projects/usb/src/sys/kern/vfs_subr.c#19 integrate .. //depot/projects/usb/src/sys/mips/include/bus.h#2 integrate .. //depot/projects/usb/src/sys/modules/ath/Makefile#4 integrate .. //depot/projects/usb/src/sys/modules/cpufreq/Makefile#3 integrate .. //depot/projects/usb/src/sys/modules/geom/geom_vinum/Makefile#2 integrate .. //depot/projects/usb/src/sys/modules/mii/Makefile#7 integrate .. //depot/projects/usb/src/sys/modules/usb/uath/Makefile#1 branch .. //depot/projects/usb/src/sys/net/bpf.h#8 integrate .. //depot/projects/usb/src/sys/net/if.c#21 integrate .. //depot/projects/usb/src/sys/net80211/ieee80211.c#18 integrate .. //depot/projects/usb/src/sys/net80211/ieee80211_ddb.c#12 integrate .. //depot/projects/usb/src/sys/net80211/ieee80211_freebsd.c#12 integrate .. //depot/projects/usb/src/sys/net80211/ieee80211_freebsd.h#14 integrate .. //depot/projects/usb/src/sys/net80211/ieee80211_hostap.c#9 integrate .. //depot/projects/usb/src/sys/net80211/ieee80211_ioctl.c#20 integrate .. //depot/projects/usb/src/sys/net80211/ieee80211_ioctl.h#10 integrate .. //depot/projects/usb/src/sys/net80211/ieee80211_node.c#19 integrate .. //depot/projects/usb/src/sys/net80211/ieee80211_output.c#20 integrate .. //depot/projects/usb/src/sys/net80211/ieee80211_proto.h#13 integrate .. //depot/projects/usb/src/sys/net80211/ieee80211_scan.c#7 integrate .. //depot/projects/usb/src/sys/net80211/ieee80211_scan.h#4 integrate .. //depot/projects/usb/src/sys/net80211/ieee80211_sta.c#7 integrate .. //depot/projects/usb/src/sys/net80211/ieee80211_superg.c#3 integrate .. //depot/projects/usb/src/sys/net80211/ieee80211_superg.h#3 integrate .. //depot/projects/usb/src/sys/net80211/ieee80211_var.h#18 integrate .. //depot/projects/usb/src/sys/net80211/ieee80211_wds.c#7 integrate .. //depot/projects/usb/src/sys/netinet/igmp.c#12 integrate .. //depot/projects/usb/src/sys/netinet/ip_fw.h#13 integrate .. //depot/projects/usb/src/sys/netinet/ip_fw2.c#20 integrate .. //depot/projects/usb/src/sys/netinet/ip_fw_pfil.c#8 integrate .. //depot/projects/usb/src/sys/netinet/sctp_indata.c#16 integrate .. //depot/projects/usb/src/sys/netinet/sctp_input.c#17 integrate .. //depot/projects/usb/src/sys/netinet/sctp_output.c#19 integrate .. //depot/projects/usb/src/sys/netinet/sctp_pcb.c#16 integrate .. //depot/projects/usb/src/sys/netinet/sctp_structs.h#11 integrate .. //depot/projects/usb/src/sys/netinet/sctp_sysctl.c#12 integrate .. //depot/projects/usb/src/sys/netinet/sctp_sysctl.h#10 integrate .. //depot/projects/usb/src/sys/netinet/sctp_uio.h#14 integrate .. //depot/projects/usb/src/sys/netinet/sctp_usrreq.c#16 integrate .. //depot/projects/usb/src/sys/netinet/sctputil.c#19 integrate .. //depot/projects/usb/src/sys/powerpc/aim/machdep.c#7 integrate .. //depot/projects/usb/src/sys/powerpc/aim/mmu_oea.c#6 integrate .. //depot/projects/usb/src/sys/powerpc/aim/mmu_oea64.c#1 branch .. //depot/projects/usb/src/sys/powerpc/aim/mp_cpudep.c#3 integrate .. //depot/projects/usb/src/sys/powerpc/aim/ofw_machdep.c#4 integrate .. //depot/projects/usb/src/sys/powerpc/aim/swtch.S#5 integrate .. //depot/projects/usb/src/sys/powerpc/aim/trap_subr.S#5 integrate .. //depot/projects/usb/src/sys/powerpc/aim/uio_machdep.c#2 delete .. //depot/projects/usb/src/sys/powerpc/aim/uma_machdep.c#2 integrate .. //depot/projects/usb/src/sys/powerpc/aim/vm_machdep.c#4 integrate .. //depot/projects/usb/src/sys/powerpc/booke/machdep.c#8 integrate .. //depot/projects/usb/src/sys/powerpc/booke/pmap.c#8 integrate .. //depot/projects/usb/src/sys/powerpc/booke/uio_machdep.c#2 delete .. //depot/projects/usb/src/sys/powerpc/include/hid.h#3 integrate .. //depot/projects/usb/src/sys/powerpc/include/intr.h#2 integrate .. //depot/projects/usb/src/sys/powerpc/include/md_var.h#7 integrate .. //depot/projects/usb/src/sys/powerpc/include/pmap.h#6 integrate .. //depot/projects/usb/src/sys/powerpc/include/sf_buf.h#3 integrate .. //depot/projects/usb/src/sys/powerpc/include/spr.h#7 integrate .. //depot/projects/usb/src/sys/powerpc/include/sysarch.h#1 branch .. //depot/projects/usb/src/sys/powerpc/include/vmparam.h#7 integrate .. //depot/projects/usb/src/sys/powerpc/ofw/ofw_syscons.c#5 integrate .. //depot/projects/usb/src/sys/powerpc/powermac/cpcht.c#1 branch .. //depot/projects/usb/src/sys/powerpc/powermac/cpchtvar.h#1 branch .. //depot/projects/usb/src/sys/powerpc/powerpc/bus_machdep.c#2 integrate .. //depot/projects/usb/src/sys/powerpc/powerpc/cpu.c#7 integrate .. //depot/projects/usb/src/sys/powerpc/powerpc/dump_machdep.c#1 branch .. //depot/projects/usb/src/sys/powerpc/powerpc/mem.c#4 integrate .. //depot/projects/usb/src/sys/powerpc/powerpc/mmu_if.m#6 integrate .. //depot/projects/usb/src/sys/powerpc/powerpc/pmap_dispatch.c#9 integrate .. //depot/projects/usb/src/sys/security/mac_biba/mac_biba.c#12 integrate .. //depot/projects/usb/src/sys/security/mac_bsdextended/mac_bsdextended.c#13 integrate .. //depot/projects/usb/src/sys/security/mac_mls/mac_mls.c#13 integrate .. //depot/projects/usb/src/sys/sys/elf_common.h#12 integrate .. //depot/projects/usb/src/sys/sys/kerneldump.h#4 integrate .. //depot/projects/usb/src/sys/sys/systm.h#14 integrate .. //depot/projects/usb/src/sys/sys/vnode.h#18 integrate .. //depot/projects/usb/src/sys/tools/vnode_if.awk#4 integrate .. //depot/projects/usb/src/sys/ufs/ffs/ffs_softdep.c#11 integrate .. //depot/projects/usb/src/sys/vm/vm_extern.h#5 integrate .. //depot/projects/usb/src/sys/vm/vm_mmap.c#16 integrate .. //depot/projects/usb/src/sys/xen/evtchn/evtchn.c#6 integrate .. //depot/projects/usb/src/sys/xen/reboot.c#2 integrate Differences ... ==== //depot/projects/usb/src/sys/amd64/acpica/acpi_switch.S#2 (text+ko) ==== @@ -25,7 +25,7 @@ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * - * $FreeBSD: src/sys/amd64/acpica/acpi_switch.S,v 1.1 2009/03/17 00:48:11 jkim Exp $ + * $FreeBSD: src/sys/amd64/acpica/acpi_switch.S,v 1.4 2009/04/02 01:46:57 jkim Exp $ */ #include <machine/asmacros.h> @@ -64,12 +64,15 @@ /* Fetch PCB. */ movq WAKEUP_CTX(xpcb), %r11 - /* Restore segment registers. */ - mov WAKEUP_PCB(DS), %ds - mov WAKEUP_PCB(ES), %es - mov WAKEUP_XPCB(SS), %ss - mov WAKEUP_PCB(FS), %fs - mov WAKEUP_PCB(GS), %gs + /* Force kernel segment registers. */ + movl $KDSEL, %eax + movw %ax, %ds + movw %ax, %es + movw %ax, %ss + movl $KUF32SEL, %eax + movw %ax, %fs + movl $KUG32SEL, %eax + movw %ax, %gs movl $MSR_FSBASE, %ecx movl WAKEUP_PCB(FSBASE), %eax @@ -123,9 +126,19 @@ /* Restore descriptor tables. */ lidt WAKEUP_XPCB(IDT) lldt WAKEUP_XPCB(LDT) + +#define SDT_SYSTSS 9 +#define SDT_SYSBSY 11 + + /* Clear "task busy" bit and reload TR. */ + movq PCPU(TSS), %rax + andb $(~SDT_SYSBSY | SDT_SYSTSS), 5(%rax) movw WAKEUP_XPCB(TR), %ax ltr %ax +#undef SDT_SYSTSS +#undef SDT_SYSBSY + /* Restore other callee saved registers. */ movq WAKEUP_PCB(R15), %r15 movq WAKEUP_PCB(R14), %r14 ==== //depot/projects/usb/src/sys/amd64/acpica/acpi_wakecode.S#3 (text+ko) ==== @@ -26,7 +26,7 @@ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * - * $FreeBSD: src/sys/amd64/acpica/acpi_wakecode.S,v 1.2 2009/03/23 22:35:30 jkim Exp $ + * $FreeBSD: src/sys/amd64/acpica/acpi_wakecode.S,v 1.3 2009/04/02 00:23:56 jkim Exp $ */ #define LOCORE @@ -223,6 +223,12 @@ bootgdt: .long 0x00000000 .long 0x00000000 + .long 0x00000000 + .long 0x00000000 + .long 0x00000000 + .long 0x00000000 + .long 0x00000000 + .long 0x00000000 bootcode64: .long 0x0000ffff @@ -261,6 +267,8 @@ wakeup_gdt: .word 0 .quad 0 + + ALIGN_DATA wakeup_efer: .quad 0 wakeup_pat: ==== //depot/projects/usb/src/sys/amd64/acpica/acpi_wakeup.c#4 (text+ko) ==== @@ -28,7 +28,7 @@ */ #include <sys/cdefs.h> -__FBSDID("$FreeBSD: src/sys/amd64/acpica/acpi_wakeup.c,v 1.24 2009/03/23 22:35:30 jkim Exp $"); +__FBSDID("$FreeBSD: src/sys/amd64/acpica/acpi_wakeup.c,v 1.25 2009/04/02 00:23:56 jkim Exp $"); #include <sys/param.h> #include <sys/systm.h> @@ -78,7 +78,6 @@ int acpi_restorecpu(struct xpcb *, vm_offset_t); int acpi_savecpu(struct xpcb *); -static void acpi_reset_tss(int cpu); static void acpi_alloc_wakeup_handler(void); static void acpi_stop_beep(void *); @@ -116,8 +115,6 @@ stopxpcbs[cpu].xpcb_gdt.rd_base); WAKECODE_FIXUP(wakeup_cpu, int, cpu); - acpi_reset_tss(cpu); - /* do an INIT IPI: assert RESET */ lapic_ipi_raw(APIC_DEST_DESTFLD | APIC_TRIGMOD_EDGE | APIC_LEVEL_ASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_INIT, apic_id); @@ -220,19 +217,6 @@ } #endif -static void -acpi_reset_tss(int cpu) -{ - uint32_t *tss; - - /* - * We have to clear "task busy" bit in TSS to restore - * task register later. Otherwise, ltr causes GPF. - */ - tss = (uint32_t *)&gdt[NGDT * cpu + GPROC0_SEL] + 1; - *tss &= ~((SDT_SYSBSY ^ SDT_SYSTSS) << 8); -} - int acpi_sleep_machdep(struct acpi_softc *sc, int state) { @@ -289,8 +273,6 @@ stopxpcbs[0].xpcb_gdt.rd_base); WAKECODE_FIXUP(wakeup_cpu, int, 0); - acpi_reset_tss(0); - /* Call ACPICA to enter the desired sleep state */ if (state == ACPI_STATE_S4 && sc->acpi_s4bios) status = AcpiEnterSleepStateS4bios(); ==== //depot/projects/usb/src/sys/amd64/amd64/apic_vector.S#4 (text+ko) ==== @@ -28,7 +28,7 @@ * SUCH DAMAGE. * * from: vector.s, 386BSD 0.1 unknown origin - * $FreeBSD: src/sys/amd64/amd64/apic_vector.S,v 1.111 2009/03/17 00:48:11 jkim Exp $ + * $FreeBSD: src/sys/amd64/amd64/apic_vector.S,v 1.112 2009/04/01 13:09:26 kib Exp $ */ /* @@ -219,10 +219,8 @@ movl $0, LA_EOI(%rax) /* End Of Interrupt to APIC */ call cpustop_handler + jmp doreti - POP_FRAME - iretq - /* * Executed by a CPU when it receives an IPI_SUSPEND from another CPU. */ @@ -251,6 +249,5 @@ call smp_rendezvous_action movq lapic, %rax movl $0, LA_EOI(%rax) /* End Of Interrupt to APIC */ - POP_FRAME /* Why not doreti? */ - iretq + jmp doreti #endif /* SMP */ ==== //depot/projects/usb/src/sys/amd64/amd64/cpu_switch.S#12 (text+ko) ==== @@ -30,7 +30,7 @@ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * - * $FreeBSD: src/sys/amd64/amd64/cpu_switch.S,v 1.167 2009/03/17 00:48:11 jkim Exp $ + * $FreeBSD: src/sys/amd64/amd64/cpu_switch.S,v 1.168 2009/04/01 13:09:26 kib Exp $ */ #include <machine/asmacros.h> @@ -75,8 +75,6 @@ 1: movq TD_PCB(%rdi),%r8 /* Old pcb */ movl PCPU(CPUID), %eax - movq PCB_FSBASE(%r8),%r9 - movq PCB_GSBASE(%r8),%r10 /* release bit from old pm_active */ movq TD_PROC(%rdi), %rdx /* oldtd->td_proc */ movq P_VMSPACE(%rdx), %rdx /* proc->p_vmspace */ @@ -110,28 +108,6 @@ movq %rbx,PCB_RBX(%r8) movq %rax,PCB_RIP(%r8) - /* - * Reread fs and gs bases. Explicit fs segment register load - * by the usermode code may change actual fs base without - * updating pcb_{fs,gs}base. - * - * %rdx still contains the mtx, save %rdx around rdmsr. - */ - movq %rdx,%r11 - movl $MSR_FSBASE,%ecx - rdmsr - shlq $32,%rdx - leaq (%rax,%rdx),%r9 - movl $MSR_KGSBASE,%ecx - rdmsr - shlq $32,%rdx - leaq (%rax,%rdx),%r10 - movq %r11,%rdx - - testl $PCB_32BIT,PCB_FLAGS(%r8) - jnz store_seg -done_store_seg: - testl $PCB_DBREGS,PCB_FLAGS(%r8) jnz store_dr /* static predict not taken */ done_store_dr: @@ -192,36 +168,47 @@ testl $TDP_KTHREAD,TD_PFLAGS(%rsi) jnz do_kthread - testl $PCB_32BIT,PCB_FLAGS(%r8) - jnz load_seg -done_load_seg: + /* + * Load ldt register + */ + movq TD_PROC(%rsi),%rcx + cmpq $0, P_MD+MD_LDT(%rcx) + jne do_ldt + xorl %eax,%eax +ld_ldt: lldt %ax - cmpq PCB_FSBASE(%r8),%r9 - jz 1f - /* Restore userland %fs */ -restore_fsbase: - movl $MSR_FSBASE,%ecx + /* Restore fs base in GDT */ movl PCB_FSBASE(%r8),%eax - movl PCB_FSBASE+4(%r8),%edx - wrmsr -1: - cmpq PCB_GSBASE(%r8),%r10 - jz 2f - /* Restore userland %gs */ - movl $MSR_KGSBASE,%ecx + movq PCPU(FS32P),%rdx + movw %ax,2(%rdx) + shrl $16,%eax + movb %al,4(%rdx) + shrl $8,%eax + movb %al,7(%rdx) + + /* Restore gs base in GDT */ movl PCB_GSBASE(%r8),%eax - movl PCB_GSBASE+4(%r8),%edx - wrmsr -2: + movq PCPU(GS32P),%rdx + movw %ax,2(%rdx) + shrl $16,%eax + movb %al,4(%rdx) + shrl $8,%eax + movb %al,7(%rdx) -do_tss: +do_kthread: + /* Do we need to reload tss ? */ + movq PCPU(TSSP),%rax + movq PCB_TSSP(%r8),%rdx + testq %rdx,%rdx + cmovzq PCPU(COMMONTSSP),%rdx + cmpq %rax,%rdx + jne do_tss +done_tss: + movq %r8,PCPU(RSP0) + movq %r8,PCPU(CURPCB) /* Update the TSS_RSP0 pointer for the next interrupt */ - movq PCPU(TSSP), %rax - movq %r8, PCPU(RSP0) - movq %r8, PCPU(CURPCB) - addq $COMMON_TSS_RSP0, %rax - movq %rsi, PCPU(CURTHREAD) /* into next thread */ - movq %r8, (%rax) + movq %r8,COMMON_TSS_RSP0(%rdx) + movq %rsi,PCPU(CURTHREAD) /* into next thread */ /* Test if debug registers should be restored. */ testl $PCB_DBREGS,PCB_FLAGS(%r8) @@ -250,45 +237,6 @@ * We use jumps rather than call in order to avoid the stack. */ -do_kthread: - /* - * Copy old fs/gsbase to new kthread pcb for future switches - * This maintains curpcb->pcb_[fg]sbase as caches of the MSR - */ - movq %r9,PCB_FSBASE(%r8) - movq %r10,PCB_GSBASE(%r8) - jmp do_tss - -store_seg: - mov %gs,PCB_GS(%r8) - testl $PCB_GS32BIT,PCB_FLAGS(%r8) - jnz 2f -1: mov %ds,PCB_DS(%r8) - mov %es,PCB_ES(%r8) - mov %fs,PCB_FS(%r8) - jmp done_store_seg -2: movq PCPU(GS32P),%rax - movq (%rax),%rax - movq %rax,PCB_GS32SD(%r8) - jmp 1b - -load_seg: - testl $PCB_GS32BIT,PCB_FLAGS(%r8) - jnz 2f -1: movl $MSR_GSBASE,%ecx - rdmsr - mov PCB_GS(%r8),%gs - wrmsr - mov PCB_DS(%r8),%ds - mov PCB_ES(%r8),%es - mov PCB_FS(%r8),%fs - jmp restore_fsbase - /* Restore userland %gs while preserving kernel gsbase */ -2: movq PCPU(GS32P),%rax - movq PCB_GS32SD(%r8),%rcx - movq %rcx,(%rax) - jmp 1b - store_dr: movq %dr7,%rax /* yes, do the save */ movq %dr0,%r15 @@ -325,6 +273,29 @@ movq %r11,%dr6 movq %rax,%dr7 jmp done_load_dr + +do_tss: movq %rdx,PCPU(TSSP) + movq %rdx,%rcx + movq PCPU(TSS),%rax + movw %rcx,2(%rax) + shrq $16,%rcx + movb %cl,4(%rax) + shrq $8,%rcx + movb %cl,7(%rax) + shrq $8,%rcx + movl %ecx,8(%rax) + movb $0x89,5(%rax) /* unset busy */ + movl $TSSSEL,%eax + ltr %ax + jmp done_tss + +do_ldt: movq PCPU(LDT),%rax + movq P_MD+MD_LDT_SD(%rcx),%rdx + movq %rdx,(%rax) + movq P_MD+MD_LDT_SD+8(%rcx),%rdx + movq %rdx,8(%rax) + movl $LDTSEL,%eax + jmp ld_ldt END(cpu_switch) /* @@ -398,12 +369,6 @@ movq (%rsp),%rax movq %rax,PCB_RIP(%r8) - mov %ds,PCB_DS(%r8) - mov %es,PCB_ES(%r8) - mov %ss,XPCB_SS(%r8) - mov %fs,PCB_FS(%r8) - mov %gs,PCB_GS(%r8) - movq %rbx,PCB_RBX(%r8) movq %rsp,PCB_RSP(%r8) movq %rbp,PCB_RBP(%r8) ==== //depot/projects/usb/src/sys/amd64/amd64/db_interface.c#2 (text+ko) ==== @@ -25,7 +25,7 @@ */ #include <sys/cdefs.h> -__FBSDID("$FreeBSD: src/sys/amd64/amd64/db_interface.c,v 1.81 2005/01/05 20:17:20 imp Exp $"); +__FBSDID("$FreeBSD: src/sys/amd64/amd64/db_interface.c,v 1.82 2009/04/01 13:09:26 kib Exp $"); /* * Interface to new debugger. @@ -139,7 +139,11 @@ db_show_mdpcpu(struct pcpu *pc) { -#if 0 - db_printf("currentldt = 0x%x\n", pc->pc_currentldt); -#endif + db_printf("curpmap = %p\n", pc->pc_curpmap); + db_printf("tssp = %p\n", pc->pc_tssp); + db_printf("commontssp = %p\n", pc->pc_commontssp); + db_printf("rsp0 = 0x%lx\n", pc->pc_rsp0); + db_printf("gs32p = %p\n", pc->pc_gs32p); + db_printf("ldt = %p\n", pc->pc_ldt); + db_printf("tss = %p\n", pc->pc_tss); } ==== //depot/projects/usb/src/sys/amd64/amd64/db_trace.c#8 (text+ko) ==== @@ -25,7 +25,7 @@ */ #include <sys/cdefs.h> -__FBSDID("$FreeBSD: src/sys/amd64/amd64/db_trace.c,v 1.84 2009/03/17 00:48:11 jkim Exp $"); +__FBSDID("$FreeBSD: src/sys/amd64/amd64/db_trace.c,v 1.85 2009/04/01 13:09:26 kib Exp $"); #include "opt_compat.h" @@ -69,12 +69,10 @@ #define DB_OFFSET(x) (db_expr_t *)offsetof(struct trapframe, x) struct db_variable db_regs[] = { { "cs", DB_OFFSET(tf_cs), db_frame }, -#if 0 { "ds", DB_OFFSET(tf_ds), db_frame }, { "es", DB_OFFSET(tf_es), db_frame }, { "fs", DB_OFFSET(tf_fs), db_frame }, { "gs", DB_OFFSET(tf_gs), db_frame }, -#endif { "ss", NULL, db_ss }, { "rax", DB_OFFSET(tf_rax), db_frame }, { "rcx", DB_OFFSET(tf_rcx), db_frame }, @@ -94,7 +92,7 @@ { "r15", DB_OFFSET(tf_r15), db_frame }, { "rip", DB_OFFSET(tf_rip), db_frame }, { "rflags", DB_OFFSET(tf_rflags), db_frame }, -#define DB_N_SHOW_REGS 20 /* Don't show registers after here. */ +#define DB_N_SHOW_REGS 24 /* Don't show registers after here. */ { "dr0", NULL, db_dr0 }, { "dr1", NULL, db_dr1 }, { "dr2", NULL, db_dr2 }, @@ -357,7 +355,7 @@ rbp = tf->tf_rbp; switch (frame_type) { case TRAP: - db_printf("--- trap %#lr", tf->tf_trapno); + db_printf("--- trap %#r", tf->tf_trapno); break; case SYSCALL: db_printf("--- syscall"); ==== //depot/projects/usb/src/sys/amd64/amd64/exception.S#10 (text+ko) ==== @@ -31,7 +31,7 @@ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * - * $FreeBSD: src/sys/amd64/amd64/exception.S,v 1.137 2009/02/03 09:01:45 jkoshy Exp $ + * $FreeBSD: src/sys/amd64/amd64/exception.S,v 1.138 2009/04/01 13:09:26 kib Exp $ */ #include "opt_atpic.h" @@ -42,6 +42,7 @@ #include <machine/asmacros.h> #include <machine/psl.h> #include <machine/trap.h> +#include <machine/specialreg.h> #include "assym.s" @@ -99,7 +100,7 @@ /* Traps that we leave interrupts disabled for.. */ #define TRAP_NOEN(a) \ subq $TF_RIP,%rsp; \ - movq $(a),TF_TRAPNO(%rsp) ; \ + movl $(a),TF_TRAPNO(%rsp) ; \ movq $0,TF_ADDR(%rsp) ; \ movq $0,TF_ERR(%rsp) ; \ jmp alltraps_noen @@ -111,7 +112,7 @@ /* Regular traps; The cpu does not supply tf_err for these. */ #define TRAP(a) \ subq $TF_RIP,%rsp; \ - movq $(a),TF_TRAPNO(%rsp) ; \ + movl $(a),TF_TRAPNO(%rsp) ; \ movq $0,TF_ADDR(%rsp) ; \ movq $0,TF_ERR(%rsp) ; \ jmp alltraps @@ -139,7 +140,7 @@ /* This group of traps have tf_err already pushed by the cpu */ #define TRAP_ERR(a) \ subq $TF_ERR,%rsp; \ - movq $(a),TF_TRAPNO(%rsp) ; \ + movl $(a),TF_TRAPNO(%rsp) ; \ movq $0,TF_ADDR(%rsp) ; \ jmp alltraps IDTVEC(tss) @@ -164,6 +165,10 @@ testb $SEL_RPL_MASK,TF_CS(%rsp) /* Did we come from kernel? */ jz alltraps_testi /* already running with kernel GS.base */ swapgs + movw %fs,TF_FS(%rsp) + movw %gs,TF_GS(%rsp) + movw %es,TF_ES(%rsp) + movw %ds,TF_DS(%rsp) alltraps_testi: testl $PSL_I,TF_RFLAGS(%rsp) jz alltraps_pushregs @@ -185,6 +190,7 @@ movq %r13,TF_R13(%rsp) movq %r14,TF_R14(%rsp) movq %r15,TF_R15(%rsp) + movl $TF_HASSEGS,TF_FLAGS(%rsp) FAKE_MCOUNT(TF_RIP(%rsp)) #ifdef KDTRACE_HOOKS /* @@ -193,7 +199,7 @@ * interrupt. For all other trap types, just handle them in * the usual way. */ - cmpq $T_BPTFLT,TF_TRAPNO(%rsp) + cmpl $T_BPTFLT,TF_TRAPNO(%rsp) jne calltrap /* Check if there is no DTrace hook registered. */ @@ -228,13 +234,17 @@ .type alltraps_noen,@function alltraps_noen: testb $SEL_RPL_MASK,TF_CS(%rsp) /* Did we come from kernel? */ - jz alltraps_pushregs /* already running with kernel GS.base */ + jz 1f /* already running with kernel GS.base */ swapgs +1: movw %fs,TF_FS(%rsp) + movw %gs,TF_GS(%rsp) + movw %es,TF_ES(%rsp) + movw %ds,TF_DS(%rsp) jmp alltraps_pushregs IDTVEC(dblfault) subq $TF_ERR,%rsp - movq $T_DOUBLEFLT,TF_TRAPNO(%rsp) + movl $T_DOUBLEFLT,TF_TRAPNO(%rsp) movq $0,TF_ADDR(%rsp) movq $0,TF_ERR(%rsp) movq %rdi,TF_RDI(%rsp) @@ -252,6 +262,11 @@ movq %r13,TF_R13(%rsp) movq %r14,TF_R14(%rsp) movq %r15,TF_R15(%rsp) + movw %fs,TF_FS(%rsp) + movw %gs,TF_GS(%rsp) + movw %es,TF_ES(%rsp) + movw %ds,TF_DS(%rsp) + movl $TF_HASSEGS,TF_FLAGS(%rsp) testb $SEL_RPL_MASK,TF_CS(%rsp) /* Did we come from kernel? */ jz 1f /* already running with kernel GS.base */ swapgs @@ -262,7 +277,7 @@ IDTVEC(page) subq $TF_ERR,%rsp - movq $T_PAGEFLT,TF_TRAPNO(%rsp) + movl $T_PAGEFLT,TF_TRAPNO(%rsp) testb $SEL_RPL_MASK,TF_CS(%rsp) /* Did we come from kernel? */ jz 1f /* already running with kernel GS.base */ swapgs @@ -270,6 +285,10 @@ movq %rdi,TF_RDI(%rsp) /* free up a GP register */ movq %cr2,%rdi /* preserve %cr2 before .. */ movq %rdi,TF_ADDR(%rsp) /* enabling interrupts. */ + movw %fs,TF_FS(%rsp) + movw %gs,TF_GS(%rsp) + movw %es,TF_ES(%rsp) + movw %ds,TF_DS(%rsp) testl $PSL_I,TF_RFLAGS(%rsp) jz alltraps_pushregs_no_rdi sti @@ -283,17 +302,19 @@ */ IDTVEC(prot) subq $TF_ERR,%rsp - movq $T_PROTFLT,TF_TRAPNO(%rsp) + movl $T_PROTFLT,TF_TRAPNO(%rsp) movq $0,TF_ADDR(%rsp) movq %rdi,TF_RDI(%rsp) /* free up a GP register */ leaq doreti_iret(%rip),%rdi cmpq %rdi,TF_RIP(%rsp) - je 2f /* kernel but with user gsbase!! */ + je 1f /* kernel but with user gsbase!! */ testb $SEL_RPL_MASK,TF_CS(%rsp) /* Did we come from kernel? */ - jz 1f /* already running with kernel GS.base */ -2: - swapgs -1: + jz 2f /* already running with kernel GS.base */ +1: swapgs +2: movw %fs,TF_FS(%rsp) + movw %gs,TF_GS(%rsp) + movw %es,TF_ES(%rsp) + movw %ds,TF_DS(%rsp) testl $PSL_I,TF_RFLAGS(%rsp) jz alltraps_pushregs_no_rdi sti @@ -316,6 +337,10 @@ movq %rcx,TF_RIP(%rsp) /* %rcx original value is in %r10 */ movq PCPU(SCRATCH_RSP),%r11 /* %r11 already saved */ movq %r11,TF_RSP(%rsp) /* user stack pointer */ + movw %fs,TF_FS(%rsp) + movw %gs,TF_GS(%rsp) + movw %es,TF_ES(%rsp) + movw %ds,TF_DS(%rsp) sti movq $KUDSEL,TF_SS(%rsp) movq $KUCSEL,TF_CS(%rsp) @@ -333,40 +358,11 @@ movq %r13,TF_R13(%rsp) /* C preserved */ movq %r14,TF_R14(%rsp) /* C preserved */ movq %r15,TF_R15(%rsp) /* C preserved */ + movl $TF_HASSEGS,TF_FLAGS(%rsp) FAKE_MCOUNT(TF_RIP(%rsp)) movq %rsp, %rdi call syscall movq PCPU(CURPCB),%rax - testq $PCB_FULLCTX,PCB_FLAGS(%rax) - jne 3f -1: /* Check for and handle AST's on return to userland */ - cli - movq PCPU(CURTHREAD),%rax - testl $TDF_ASTPENDING | TDF_NEEDRESCHED,TD_FLAGS(%rax) - je 2f - sti - movq %rsp, %rdi - call ast - jmp 1b -2: /* restore preserved registers */ - MEXITCOUNT - movq TF_RDI(%rsp),%rdi /* bonus; preserve arg 1 */ - movq TF_RSI(%rsp),%rsi /* bonus: preserve arg 2 */ - movq TF_RDX(%rsp),%rdx /* return value 2 */ - movq TF_RAX(%rsp),%rax /* return value 1 */ - movq TF_RBX(%rsp),%rbx /* C preserved */ - movq TF_RBP(%rsp),%rbp /* C preserved */ - movq TF_R12(%rsp),%r12 /* C preserved */ - movq TF_R13(%rsp),%r13 /* C preserved */ - movq TF_R14(%rsp),%r14 /* C preserved */ - movq TF_R15(%rsp),%r15 /* C preserved */ - movq TF_RFLAGS(%rsp),%r11 /* original %rflags */ - movq TF_RIP(%rsp),%rcx /* original %rip */ - movq TF_RSP(%rsp),%r9 /* user stack pointer */ - movq %r9,%rsp /* original %rsp */ - swapgs - sysretq -3: /* Requested full context restore, use doreti for that */ andq $~PCB_FULLCTX,PCB_FLAGS(%rax) MEXITCOUNT jmp doreti @@ -405,7 +401,7 @@ IDTVEC(nmi) subq $TF_RIP,%rsp - movq $(T_NMI),TF_TRAPNO(%rsp) + movl $(T_NMI),TF_TRAPNO(%rsp) movq $0,TF_ADDR(%rsp) movq $0,TF_ERR(%rsp) movq %rdi,TF_RDI(%rsp) @@ -423,6 +419,11 @@ movq %r13,TF_R13(%rsp) movq %r14,TF_R14(%rsp) movq %r15,TF_R15(%rsp) + movw %fs,TF_FS(%rsp) + movw %gs,TF_GS(%rsp) + movw %es,TF_ES(%rsp) + movw %ds,TF_DS(%rsp) + movl $TF_HASSEGS,TF_FLAGS(%rsp) xorl %ebx,%ebx testb $SEL_RPL_MASK,TF_CS(%rsp) jnz nmi_fromuserspace @@ -515,9 +516,7 @@ nocallchain: #endif testl %ebx,%ebx - jz nmi_kernelexit - swapgs - jmp nmi_restoreregs + jnz doreti_exit nmi_kernelexit: /* * Put back the preserved MSR_GSBASE value. @@ -633,7 +632,55 @@ */ doreti_exit: MEXITCOUNT - movq TF_RDI(%rsp),%rdi + movq PCPU(CURTHREAD),%r8 + movq TD_PCB(%r8),%r8 + + /* + * Do not reload segment registers for kernel. + * Since we do not reload segments registers with sane + * values on kernel entry, descriptors referenced by + * segments registers may be not valid. This is fatal + * for the usermode, but is innocent for the kernel. + */ + testb $SEL_RPL_MASK,TF_CS(%rsp) + jz ld_regs + + testl $TF_HASSEGS,TF_FLAGS(%rsp) + je set_segs + +do_segs: + /* Restore %fs and fsbase */ + movw TF_FS(%rsp),%ax + .globl ld_fs +ld_fs: movw %ax,%fs + cmpw $KUF32SEL,%ax + jne 1f + movl $MSR_FSBASE,%ecx + movl PCB_FSBASE(%r8),%eax + movl PCB_FSBASE+4(%r8),%edx + wrmsr +1: + /* Restore %gs and gsbase */ + movw TF_GS(%rsp),%si + pushfq + cli + movl $MSR_GSBASE,%ecx + rdmsr + .globl ld_gs +ld_gs: movw %si,%gs >>> TRUNCATED FOR MAIL (1000 lines) <<<
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