diff options
| author | Kurt Miller <kurt@cvs.openbsd.org> | 2008-07-18 16:40:18 +0000 |
|---|---|---|
| committer | Kurt Miller <kurt@cvs.openbsd.org> | 2008-07-18 16:40:18 +0000 |
| commit | 9d741144290ccbc0fa7905a4b2359a24d7606fbd (patch) | |
| tree | aaf5480cc97ddb01e80b6498db6c60b3f8610427 /sys/arch/macppc | |
| parent | 98b4cba6a75c90bb5103f54759d0b1b7a886ed22 (diff) | |
Add new uvm function called uvm_map_pie() which takes align as a
parameter and returns an aligned random load address for position
independent executables to use. This also adds three new vmparam.h
defines to specify the maximum address, minimum address and minimum
allowed alignment for uvm_map_pie() to use. The PIE address range
for i386 was carefully selected to work well within the i386 W^X
framework.
With much help and feedback from weingart@.
okay weingart@, miod@, kettenis@, drahn@
Diffstat (limited to 'sys/arch/macppc')
| -rw-r--r-- | sys/arch/macppc/include/vmparam.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/sys/arch/macppc/include/vmparam.h b/sys/arch/macppc/include/vmparam.h index ab20ab911a9..c0fcbd26b80 100644 --- a/sys/arch/macppc/include/vmparam.h +++ b/sys/arch/macppc/include/vmparam.h @@ -1,4 +1,4 @@ -/* $OpenBSD: vmparam.h,v 1.19 2007/06/14 14:27:46 drahn Exp $ */ +/* $OpenBSD: vmparam.h,v 1.20 2008/07/18 16:40:17 kurt Exp $ */ /* $NetBSD: vmparam.h,v 1.1 1996/09/30 16:34:38 ws Exp $ */ /*- @@ -80,6 +80,10 @@ #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)(PPC_KERNEL_SR << ADDR_SR_SHIFT)) +/* map PIE into approximately the first quarter of user va space */ +#define VM_PIE_MIN_ADDR PAGE_SIZE +#define VM_PIE_MAX_ADDR 0x40000000 + /* ppc_kvm_stolen is so that vm space can be stolen before vm is fully * initialized. */ |