---
- branch: netbsd-8
  date: Thu Apr 12 13:08:16 UTC 2018
  files:
  - new: 1.6.6.1
    old: '1.6'
    path: src/sys/arch/x86/x86/dbregs.c
    pathrev: src/sys/arch/x86/x86/dbregs.c@1.6.6.1
    type: modified
  id: 20180412T130816Z.d84fe9205fb27d1a3041a188a187bcde7c57f0fd
  log: "Pull up following revision(s) (requested by kamil in ticket #712):\n\n\tsys/arch/x86/x86/dbregs.c:
    revision 1.7-1.9\n\nFix the check, should be >=.\n\nHum, don't let userland set
    bit 13, because this can crash the kernel.\n\nAdd paranoid code to X86 Debug Registers\n\nReset
    certain bits in DR6 and DR7 in x86_dbregs_setup_initdbstate().\nReset X86_BREAKPOINT_CONDITION_DETECTED
    in DR6.\nReset X86_DR7_GENERAL_DETECT_ENABLE in DR7.\n\nIt's allowed by devices
    or software before the kernel boot, to\nuse these registers for their own purposes.
    Handle this paranoid case\nexplicitly setting the mentioned bits to zero.\n\nSponsored
    by <The NetBSD Foundation>\n"
  module: src
  subject: 'CVS commit: [netbsd-8] src/sys/arch/x86/x86'
  unixtime: '1523538496'
  user: martin