uts: Allow for address space randomisation.
Randomise the base addresses of shared objects, non-fixed mappings, the
stack and the heap.  Introduce a service, svc:/system/process-security,
and a tool psecflags(1) to control and observe it

*** 62,71 ****
--- 62,72 ----
  #include <sys/pset.h>
  #include <sys/procfs_isa.h>
  #include <sys/priv.h>
  #include <sys/stat.h>
  #include <sys/param.h>
+ #include <sys/secflags.h>
  
  /*
   * System call interfaces for /proc.
   */
  
*** 178,188 ****
          char    pr_pad[3];
          taskid_t pr_taskid;     /* task id */
          projid_t pr_projid;     /* project id */
          int     pr_nzomb;       /* number of zombie lwps in the process */
          zoneid_t pr_zoneid;     /* zone id */
!         int     pr_filler[15];  /* reserved for future use */
          lwpstatus_t pr_lwp;     /* status of the representative lwp */
  } pstatus_t;
  
  /*
   * pr_flags (same values appear in both pstatus_t and lwpstatus_t pr_flags).
--- 179,190 ----
          char    pr_pad[3];
          taskid_t pr_taskid;     /* task id */
          projid_t pr_projid;     /* project id */
          int     pr_nzomb;       /* number of zombie lwps in the process */
          zoneid_t pr_zoneid;     /* zone id */
!         psecflags_t pr_secflags; /* security flags */
!         int     pr_filler[13];  /* reserved for future use */
          lwpstatus_t pr_lwp;     /* status of the representative lwp */
  } pstatus_t;
  
  /*
   * pr_flags (same values appear in both pstatus_t and lwpstatus_t pr_flags).
*** 635,645 ****
          char    pr_pad[3];
          id32_t  pr_taskid;      /* task id */
          id32_t  pr_projid;      /* project id */
          int     pr_nzomb;       /* number of zombie lwps in the process */
          id32_t  pr_zoneid;      /* zone id */
!         int     pr_filler[15];  /* reserved for future use */
          lwpstatus32_t pr_lwp;   /* status of the representative lwp */
  } pstatus32_t;
  
  /*
   * _ILP32 lwp ps(1) information file.  /proc/<pid>/lwp/<lwpid>/lwpsinfo
--- 637,648 ----
          char    pr_pad[3];
          id32_t  pr_taskid;      /* task id */
          id32_t  pr_projid;      /* project id */
          int     pr_nzomb;       /* number of zombie lwps in the process */
          id32_t  pr_zoneid;      /* zone id */
!         psecflags_t pr_secflags; /* security flags */
!         int     pr_filler[13];  /* reserved for future use */
          lwpstatus32_t pr_lwp;   /* status of the representative lwp */
  } pstatus32_t;
  
  /*
   * _ILP32 lwp ps(1) information file.  /proc/<pid>/lwp/<lwpid>/lwpsinfo