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| author | Jon Medhurst <tixy@yxit.co.uk> | 2011-06-10 21:29:04 +0200 |
|---|---|---|
| committer | Tixy <tixy@medhuaa1.miniserver.com> | 2011-07-13 19:32:45 +0200 |
| commit | 263e368a2f1f960db07d7524a4a3e7df951f1f72 (patch) | |
| tree | eb8b1ba0a5d07368de5bd65b579a5f69233ddb07 /arch/arm/kernel/kprobes-common.c | |
| parent | ARM: kprobes: Decode 32-bit Thumb hint instructions (diff) | |
| download | linux-263e368a2f1f960db07d7524a4a3e7df951f1f72.tar.xz linux-263e368a2f1f960db07d7524a4a3e7df951f1f72.zip | |
ARM: kprobes: Add load_write_pc()
This writes a value to PC which was obtained as the result of a
LDR or LDM instruction. For ARMv5T and later this must perform
interworking.
Signed-off-by: Jon Medhurst <tixy@yxit.co.uk>
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Diffstat (limited to 'arch/arm/kernel/kprobes-common.c')
| -rw-r--r-- | arch/arm/kernel/kprobes-common.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/arm/kernel/kprobes-common.c b/arch/arm/kernel/kprobes-common.c index 3a3e765d2090..86fdc4c4c2ce 100644 --- a/arch/arm/kernel/kprobes-common.c +++ b/arch/arm/kernel/kprobes-common.c @@ -45,9 +45,24 @@ void __init find_str_pc_offset(void) #endif /* !find_str_pc_offset */ +#ifndef test_load_write_pc_interworking + +bool load_write_pc_interworks; + +void __init test_load_write_pc_interworking(void) +{ + int arch = cpu_architecture(); + BUG_ON(arch == CPU_ARCH_UNKNOWN); + load_write_pc_interworks = arch >= CPU_ARCH_ARMv5T; +} + +#endif /* !test_load_write_pc_interworking */ + + void __init arm_kprobe_decode_init(void) { find_str_pc_offset(); + test_load_write_pc_interworking(); } |