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/i386/include | |
| 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/i386/include')
| -rw-r--r-- | sys/arch/i386/include/vmparam.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/sys/arch/i386/include/vmparam.h b/sys/arch/i386/include/vmparam.h index e871997fd43..9c2163e6c2d 100644 --- a/sys/arch/i386/include/vmparam.h +++ b/sys/arch/i386/include/vmparam.h @@ -1,4 +1,4 @@ -/* $OpenBSD: vmparam.h,v 1.40 2008/06/24 21:24:03 deraadt Exp $ */ +/* $OpenBSD: vmparam.h,v 1.41 2008/07/18 16:40:17 kurt Exp $ */ /* $NetBSD: vmparam.h,v 1.15 1994/10/27 04:16:34 cgd Exp $ */ /*- @@ -77,6 +77,10 @@ /* I386 has a line where all code is executable: 0 - I386_MAX_EXE_ADDR */ #define I386_MAX_EXE_ADDR 0x20000000 /* exec line */ +/* map PIE into 320MB - 448MB address range */ +#define VM_PIE_MIN_ADDR 0x14000000 +#define VM_PIE_MAX_ADDR 0x1C000000 + /* * Size of shared memory map */ |