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arm64: make sys_call_table const

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As with x86, mark the sys_call_table const such that it will be placed
in the .rodata section. This will cause attempts to modify the table
(accidental or deliberate) to fail when strict page permissions are in
place. In the absence of strict page permissions, there should be no
functional change.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Mark Rutland 2015-01-08 11:42:59 +00:00 committed by Catalin Marinas
parent 9648606946
commit c623b33b4e
1 changed files with 1 additions and 1 deletions
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arch/arm64/kernel/sys.c
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@ -49,7 +49,7 @@ asmlinkage long sys_rt_sigreturn_wrapper(void);
* The sys_call_table array must be 4K aligned to be accessible from * The sys_call_table array must be 4K aligned to be accessible from
* kernel/entry.S. * kernel/entry.S.
*/ */
void *sys_call_table[__NR_syscalls] __aligned(4096) = { void * const sys_call_table[__NR_syscalls] __aligned(4096) = {
[0 ... __NR_syscalls - 1] = sys_ni_syscall, [0 ... __NR_syscalls - 1] = sys_ni_syscall,
#include <asm/unistd.h> #include <asm/unistd.h>
}; };