cvs commit: src/sys/amd64/amd64 machdep.c mp_machdep.c

[Peter Wemm]

peter       2008-07-09 19:44:37 UTC

  FreeBSD src repository

  Modified files:
    sys/amd64/amd64      machdep.c mp_machdep.c 
  Log:
  SVN rev 180393 on 2008-07-09 19:44:37Z by peter
  
  Band-aid a problem with 32 bit selector setup.
  
  Initialize %ds, %es, and %fs during CPU startup.  Otherwise a garbage
  value could leak to a 32-bit process if a process migrated to a different
  CPU after exec and the new CPU had never exec'd a 32-bit process.
  
  A more complete fix is needed, but this mitigates the most frequent
  manifestations.
  
  Obtained from:  ups
  
  Revision  Changes    Path
  1.687     +4 -0      src/sys/amd64/amd64/machdep.c
  1.291     +5 -1      src/sys/amd64/amd64/mp_machdep.c