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author | Jon Medhurst <tixy@yxit.co.uk> | 2011-07-07 18:58:29 (GMT) |
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committer | Tixy <tixy@medhuaa1.miniserver.com> | 2011-07-13 17:32:41 (GMT) |
commit | aea490299f7f0412f884a4895bc96211d8d8dbaf (patch) | |
tree | ef4ad811403f718f4923213ac53e9fb793dafc11 /arch/arm/kernel/kprobes.h | |
parent | 6c8df3300f60cae54aeb2a6dda8efe7ffe16a322 (diff) | |
download | linux-aea490299f7f0412f884a4895bc96211d8d8dbaf.tar.xz |
ARM: kprobes: Make str_pc_offset a constant on ARMv7
The str_pc_offset value is architecturally defined on ARMv7 onwards so
we can make it a compile time constant. This means on Thumb kernels the
runtime checking code isn't needed, which saves us from having to fix it
to work for Thumb.
Signed-off-by: Jon Medhurst <tixy@yxit.co.uk>
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Diffstat (limited to 'arch/arm/kernel/kprobes.h')
-rw-r--r-- | arch/arm/kernel/kprobes.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/arm/kernel/kprobes.h b/arch/arm/kernel/kprobes.h index 43f630d..406bb2d 100644 --- a/arch/arm/kernel/kprobes.h +++ b/arch/arm/kernel/kprobes.h @@ -36,7 +36,21 @@ void __init arm_kprobe_decode_init(void); extern kprobe_check_cc * const kprobe_condition_checks[16]; + +#if __LINUX_ARM_ARCH__ >= 7 + +/* str_pc_offset is architecturally defined from ARMv7 onwards */ +#define str_pc_offset 8 +#define find_str_pc_offset() + +#else /* __LINUX_ARM_ARCH__ < 7 */ + +/* We need a run-time check to determine str_pc_offset */ extern int str_pc_offset; +void __init find_str_pc_offset(void); + +#endif + /* * Test if load/store instructions writeback the address register. |