From 2e9ef6b66a94d42389c1dc52c78b4db32d1d364a Mon Sep 17 00:00:00 2001 From: Ted Unangst Date: Sun, 13 Jul 2014 08:15:17 +0000 Subject: more mmap random on 64-bit platforms. noticed in freebsd aslr patches. --- sys/uvm/uvm_map.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'sys') diff --git a/sys/uvm/uvm_map.c b/sys/uvm/uvm_map.c index 702b3bfe307..86fb84d4425 100644 --- a/sys/uvm/uvm_map.c +++ b/sys/uvm/uvm_map.c @@ -1,4 +1,4 @@ -/* $OpenBSD: uvm_map.c,v 1.171 2014/07/12 18:44:01 tedu Exp $ */ +/* $OpenBSD: uvm_map.c,v 1.172 2014/07/13 08:15:16 tedu Exp $ */ /* $NetBSD: uvm_map.c,v 1.86 2000/11/27 08:40:03 chs Exp $ */ /* @@ -3541,7 +3541,11 @@ uvm_map_hint(struct vmspace *vm, vm_prot_t prot) } #endif +#ifdef __LP64__ + spacing = (MIN((4UL * 1024 * 1024 * 1024), BRKSIZ) - 1); +#else spacing = (MIN((256 * 1024 * 1024), BRKSIZ) - 1); +#endif addr = (vaddr_t)vm->vm_daddr; /* -- cgit v1.2.3