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7029 want per-process exploit mitigation features (secflags)
7030 want basic address space layout randomization (aslr)
7031 noexec_user_stack should be a secflag
7032 want a means to forbid mappings around NULL.


 172         t0.t_tid = p0.p_lwpcnt = p0.p_lwprcnt = p0.p_lwpid = 1;
 173 
 174         mpcb = lwptompcb(&lwp0);
 175         mpcb->mpcb_fpu = fp;
 176         mpcb->mpcb_fpu->fpu_q = mpcb->mpcb_fpu_q;
 177         mpcb->mpcb_thread = &t0;
 178         lwp0.lwp_fpu = (void *)mpcb->mpcb_fpu;
 179 
 180         p0.p_exec = NULL;
 181         p0.p_stat = SRUN;
 182         p0.p_flag = SSYS;
 183         p0.p_tlist = &t0;
 184         p0.p_stksize = 2*PAGESIZE;
 185         p0.p_stkpageszc = 0;
 186         p0.p_as = &kas;
 187         p0.p_lockp = &p0lock;
 188         p0.p_utraps = NULL;
 189         p0.p_brkpageszc = 0;
 190         p0.p_t1_lgrpid = LGRP_NONE;
 191         p0.p_tr_lgrpid = LGRP_NONE;

 192         sigorset(&p0.p_ignore, &ignoredefault);
 193 

 194         CPU->cpu_thread = &t0;
 195         CPU->cpu_dispthread = &t0;
 196         bzero(&cpu0_disp, sizeof (disp_t));
 197         CPU->cpu_disp = &cpu0_disp;
 198         CPU->cpu_disp->disp_cpu = CPU;
 199         CPU->cpu_idle_thread = &t0;
 200         CPU->cpu_flags = CPU_RUNNING;
 201         CPU->cpu_id = getprocessorid();
 202         CPU->cpu_dispatch_pri = t0.t_pri;
 203 
 204         /*
 205          * Initialize thread/cpu microstate accounting
 206          */
 207         init_mstate(&t0, LMS_SYSTEM);
 208         init_cpu_mstate(CPU, CMS_SYSTEM);
 209 
 210         /*
 211          * Initialize lists of available and active CPUs.
 212          */
 213         cpu_list_init(CPU);




 172         t0.t_tid = p0.p_lwpcnt = p0.p_lwprcnt = p0.p_lwpid = 1;
 173 
 174         mpcb = lwptompcb(&lwp0);
 175         mpcb->mpcb_fpu = fp;
 176         mpcb->mpcb_fpu->fpu_q = mpcb->mpcb_fpu_q;
 177         mpcb->mpcb_thread = &t0;
 178         lwp0.lwp_fpu = (void *)mpcb->mpcb_fpu;
 179 
 180         p0.p_exec = NULL;
 181         p0.p_stat = SRUN;
 182         p0.p_flag = SSYS;
 183         p0.p_tlist = &t0;
 184         p0.p_stksize = 2*PAGESIZE;
 185         p0.p_stkpageszc = 0;
 186         p0.p_as = &kas;
 187         p0.p_lockp = &p0lock;
 188         p0.p_utraps = NULL;
 189         p0.p_brkpageszc = 0;
 190         p0.p_t1_lgrpid = LGRP_NONE;
 191         p0.p_tr_lgrpid = LGRP_NONE;
 192         psecflags_default(&p0.p_secflags);
 193         sigorset(&p0.p_ignore, &ignoredefault);
 194 
 195 
 196         CPU->cpu_thread = &t0;
 197         CPU->cpu_dispthread = &t0;
 198         bzero(&cpu0_disp, sizeof (disp_t));
 199         CPU->cpu_disp = &cpu0_disp;
 200         CPU->cpu_disp->disp_cpu = CPU;
 201         CPU->cpu_idle_thread = &t0;
 202         CPU->cpu_flags = CPU_RUNNING;
 203         CPU->cpu_id = getprocessorid();
 204         CPU->cpu_dispatch_pri = t0.t_pri;
 205 
 206         /*
 207          * Initialize thread/cpu microstate accounting
 208          */
 209         init_mstate(&t0, LMS_SYSTEM);
 210         init_cpu_mstate(CPU, CMS_SYSTEM);
 211 
 212         /*
 213          * Initialize lists of available and active CPUs.
 214          */
 215         cpu_list_init(CPU);