[SCM] GNU Mach branch, master, updated. v1.6-73-g675fd4e

[Samuel Thibault]

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- Log -----------------------------------------------------------------
commit 675fd4eecd75a7156c83bb814ecfdbbcfbf27ea1
Author: Samuel Thibault <address@hidden>
Date:   Wed Apr 20 00:32:15 2016 +0200

    Add kernel profiling through sampling
    
    * NEWS: Advertise feature.
    * configfrac.ac (--enable-kernsample): Add option.
    * kern/pc_sample.h (take_pc_sample): Add usermode and pc parameter.
    (take_pc_sample_macro): Take usermode and pc parameters, pass as such to
    take_pc_sample.
    * kern/pc_sample.c (take_pc_sample): Use pc parameter when usermode is 1.
    * kern/mach_clock.c (clock_interrupt): Add pc parameter. Pass usermode and
    pc to take_pc_sample_macro call.
    * i386/i386/hardclock.c (hardclock): Pass regs->eip to clock_interrupt call
    on normal interrupts, NULL on interrupt interrupt.
    * vm/vm_fault.c (vm_fault_cleanup): Set usermode to 1 and pc to NULL in
    take_pc_sample_macro call.

-----------------------------------------------------------------------

Summary of changes:
 NEWS                  |    2 ++
 configfrag.ac         |    9 +++++++++
 i386/i386/hardclock.c |    9 +++++----
 kern/mach_clock.c     |   10 +++++++---
 kern/mach_clock.h     |    3 ++-
 kern/pc_sample.c      |   10 ++++++++--
 kern/pc_sample.h      |   10 ++++++----
 vm/vm_fault.c         |    2 +-
 8 files changed, 40 insertions(+), 15 deletions(-)


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