[src/trunk]: src/sys/kern simplify.

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/237e7c5a7f1b
branches:  trunk
changeset: 814435:237e7c5a7f1b
user:      christos <christos%NetBSD.org@localhost>
date:      Sun Mar 20 16:39:36 2016 +0000

description:
simplify.

diffstat:

 sys/kern/kern_pax.c |  23 ++++++++++++-----------
 1 files changed, 12 insertions(+), 11 deletions(-)

diffs (58 lines):

diff -r 56b545f4d0c1 -r 237e7c5a7f1b sys/kern/kern_pax.c
--- a/sys/kern/kern_pax.c       Sun Mar 20 16:26:06 2016 +0000
+++ b/sys/kern/kern_pax.c       Sun Mar 20 16:39:36 2016 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: kern_pax.c,v 1.35 2016/03/20 14:58:10 khorben Exp $    */
+/*     $NetBSD: kern_pax.c,v 1.36 2016/03/20 16:39:36 christos Exp $   */
 
 /*
  * Copyright (c) 2015 The NetBSD Foundation, Inc.
@@ -57,7 +57,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: kern_pax.c,v 1.35 2016/03/20 14:58:10 khorben Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kern_pax.c,v 1.36 2016/03/20 16:39:36 christos Exp $");
 
 #include "opt_pax.h"
 
@@ -86,7 +86,6 @@
 
 #ifdef PAX_ASLR
 #include <sys/mman.h>
-#include <compat/netbsd32/netbsd32.h>
 
 int pax_aslr_enabled = 1;
 int pax_aslr_global = PAX_ASLR;
@@ -97,6 +96,9 @@
 #ifndef PAX_ASLR_DELTA_MMAP_LEN
 #define PAX_ASLR_DELTA_MMAP_LEN                ((sizeof(void *) * NBBY) / 2)
 #endif
+#ifndef PAX_ASLR_DELTA_MMAP_LEN32
+#define PAX_ASLR_DELTA_MMAP_LEN32      ((sizeof(uint32_t) * NBBY) / 2)
+#endif
 #ifndef PAX_ASLR_DELTA_STACK_LSB
 #define PAX_ASLR_DELTA_STACK_LSB       PGSHIFT
 #endif
@@ -405,14 +407,13 @@
        if (!pax_aslr_active(l))
                return;
 
-       if (ep->ep_flags & EXEC_32)
-               vm->vm_aslr_delta_mmap = PAX_ASLR_DELTA(cprng_fast32(),
-                   PAX_ASLR_DELTA_MMAP_LSB,
-                   (sizeof(netbsd32_pointer_t) * NBBY) / 2);
-       else
-               vm->vm_aslr_delta_mmap = PAX_ASLR_DELTA(cprng_fast32(),
-                   PAX_ASLR_DELTA_MMAP_LSB, PAX_ASLR_DELTA_MMAP_LEN);
-       PAX_DPRINTF("delta_mmap=%#jx", vm->vm_aslr_delta_mmap);
+       uint32_t len = (ep->ep_flags & EXEC_32) ?
+           PAX_ASLR_DELTA_MMAP_LEN32 : PAX_ASLR_DELTA_MMAP_LEN;
+
+       vm->vm_aslr_delta_mmap = PAX_ASLR_DELTA(cprng_fast32(),
+           PAX_ASLR_DELTA_MMAP_LSB, len);
+
+       PAX_DPRINTF("delta_mmap=%#jx/%u", vm->vm_aslr_delta_mmap, len);
 }
 
 void