diff options
| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-07-24 00:29:18 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-08-11 18:35:20 -0700 |
| commit | a5510daad56d3b9738d475957750db9d4fc607a9 (patch) | |
| tree | 43e5fbb3c27c4117a29e0fd3e2b1a4a99c843431 /arch/arm/include | |
| parent | 7c5db81779e0ab75fc2d71397911c546046f922f (diff) | |
ARM: move signal handlers into a vdso-like page
commit 48be69a026b2c17350a5ef18a1959a919f60be7d upstream.
Move the signal handlers into a VDSO page rather than keeping them in
the vectors page. This allows us to place them randomly within this
page, and also map the page at a random location within userspace
further protecting these code fragments from ROP attacks. The new
VDSO page is also poisoned in the same way as the vector page.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/arm/include')
| -rw-r--r-- | arch/arm/include/asm/elf.h | 4 | ||||
| -rw-r--r-- | arch/arm/include/asm/mmu.h | 1 |
2 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm/include/asm/elf.h b/arch/arm/include/asm/elf.h index 38050b1c4800..9c9b30717fda 100644 --- a/arch/arm/include/asm/elf.h +++ b/arch/arm/include/asm/elf.h @@ -130,4 +130,8 @@ struct mm_struct; extern unsigned long arch_randomize_brk(struct mm_struct *mm); #define arch_randomize_brk arch_randomize_brk +#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1 +struct linux_binprm; +int arch_setup_additional_pages(struct linux_binprm *, int); + #endif diff --git a/arch/arm/include/asm/mmu.h b/arch/arm/include/asm/mmu.h index e3d55547e755..7345e37155d5 100644 --- a/arch/arm/include/asm/mmu.h +++ b/arch/arm/include/asm/mmu.h @@ -8,6 +8,7 @@ typedef struct { atomic64_t id; #endif unsigned int vmalloc_seq; + unsigned long sigpage; } mm_context_t; #ifdef CONFIG_CPU_HAS_ASID |