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| author | Jiri Kosina <jkosina@suse.cz> | 2008-01-30 13:31:07 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:31:07 +0100 |
| commit | cc503c1b43e002e3f1fed70f46d947e2bf349bb6 (patch) | |
| tree | df0d77b7bccf0148c7b7cdd0363354499b259f99 /include/asm-x86/pgtable_64.h | |
| parent | x86: unify include/asm-x86/linkage_[32|64].h (diff) | |
| download | linux-cc503c1b43e002e3f1fed70f46d947e2bf349bb6.tar.xz linux-cc503c1b43e002e3f1fed70f46d947e2bf349bb6.zip | |
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.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-x86/pgtable_64.h b/include/asm-x86/pgtable_64.h index 9d4f11dd566f..6cf40dec0932 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) |