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authorJiri Kosina <jkosina@suse.cz>2008-01-30 13:31:07 +0100
committerIngo Molnar <mingo@elte.hu>2008-01-30 13:31:07 +0100
commitcc503c1b43e002e3f1fed70f46d947e2bf349bb6 (patch)
treedf0d77b7bccf0148c7b7cdd0363354499b259f99 /include/asm-x86/pgtable_64.h
parent82f74e7159749cc511ebf5954a7b9ea6ad634949 (diff)
x86: PIE executable randomization
main executable of (specially compiled/linked -pie/-fpie) ET_DYN binaries onto a random address (in cases in which mmap() is allowed to perform a randomization). The code has been extraced from Ingo's exec-shield patch http://people.redhat.com/mingo/exec-shield/ [akpm@linux-foundation.org: fix used-uninitialsied warning] [kamezawa.hiroyu@jp.fujitsu.com: fixed ia32 ELF on x86_64 handling] Signed-off-by: Jiri Kosina <jkosina@suse.cz> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Arjan van de Ven <arjan@infradead.org> Cc: Roland McGrath <roland@redhat.com> Cc: Jakub Jelinek <jakub@redhat.com> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/asm-x86/pgtable_64.h')
-rw-r--r--include/asm-x86/pgtable_64.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-x86/pgtable_64.h b/include/asm-x86/pgtable_64.h
index 9d4f11dd566..6cf40dec093 100644
--- a/include/asm-x86/pgtable_64.h
+++ b/include/asm-x86/pgtable_64.h
@@ -413,6 +413,7 @@ pte_t *lookup_address(unsigned long addr);
remap_pfn_range(vma, vaddr, pfn, size, prot)
#define HAVE_ARCH_UNMAPPED_AREA
+#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
#define pgtable_cache_init() do { } while (0)
#define check_pgt_cache() do { } while (0)