diff options
| author | Jon Medhurst <tixy@yxit.co.uk> | 2011-04-18 08:53:55 +0100 |
|---|---|---|
| committer | Nicolas Pitre <nicolas.pitre@linaro.org> | 2011-04-28 23:40:59 -0400 |
| commit | ac211c6994fb5f1f282745054c00d29e53639cb1 (patch) | |
| tree | 98f60598c79d51dddfe301a644cbed7b2edcea0a /arch | |
| parent | fa1a03b429b3fd5f28e7fdd20ce99ca572bfd236 (diff) | |
| download | lwn-ac211c6994fb5f1f282745054c00d29e53639cb1.tar.gz lwn-ac211c6994fb5f1f282745054c00d29e53639cb1.zip | |
ARM: kprobes: Consolidate stub decoding functions
Following the change to remove support for coprocessor instructions
we are left with three stub functions which can be consolidated.
Signed-off-by: Jon Medhurst <tixy@yxit.co.uk>
Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/kernel/kprobes-decode.c | 40 |
1 files changed, 9 insertions, 31 deletions
diff --git a/arch/arm/kernel/kprobes-decode.c b/arch/arm/kernel/kprobes-decode.c index ff3970741653..fb818976f4cb 100644 --- a/arch/arm/kernel/kprobes-decode.c +++ b/arch/arm/kernel/kprobes-decode.c @@ -1428,33 +1428,19 @@ space_cccc_101x(kprobe_opcode_t insn, struct arch_specific_insn *asi) } static enum kprobe_insn __kprobes -space_cccc_1100_010x(kprobe_opcode_t insn, struct arch_specific_insn *asi) +space_cccc_11xx(kprobe_opcode_t insn, struct arch_specific_insn *asi) { + /* Coprocessor instructions... */ /* MCRR : cccc 1100 0100 xxxx xxxx xxxx xxxx xxxx : (Rd!=Rn) */ /* MRRC : cccc 1100 0101 xxxx xxxx xxxx xxxx xxxx : (Rd!=Rn) */ - return INSN_REJECTED; -} + /* LDC : cccc 110x xxx1 xxxx xxxx xxxx xxxx xxxx */ + /* STC : cccc 110x xxx0 xxxx xxxx xxxx xxxx xxxx */ + /* CDP : cccc 1110 xxxx xxxx xxxx xxxx xxx0 xxxx */ + /* MCR : cccc 1110 xxx0 xxxx xxxx xxxx xxx1 xxxx */ + /* MRC : cccc 1110 xxx1 xxxx xxxx xxxx xxx1 xxxx */ -static enum kprobe_insn __kprobes -space_cccc_110x(kprobe_opcode_t insn, struct arch_specific_insn *asi) -{ - /* LDC : cccc 110x xxx1 xxxx xxxx xxxx xxxx xxxx */ - /* STC : cccc 110x xxx0 xxxx xxxx xxxx xxxx xxxx */ - return INSN_REJECTED; -} + /* SVC : cccc 1111 xxxx xxxx xxxx xxxx xxxx xxxx */ -static enum kprobe_insn __kprobes -space_cccc_111x(kprobe_opcode_t insn, struct arch_specific_insn *asi) -{ - /* BKPT : 1110 0001 0010 xxxx xxxx xxxx 0111 xxxx */ - /* SWI : cccc 1111 xxxx xxxx xxxx xxxx xxxx xxxx */ - if ((insn & 0xfff000f0) == 0xe1200070 || - (insn & 0x0f000000) == 0x0f000000) - return INSN_REJECTED; - - /* CDP : cccc 1110 xxxx xxxx xxxx xxxx xxx0 xxxx */ - /* MCR : cccc 1110 xxx0 xxxx xxxx xxxx xxx1 xxxx */ - /* MRC : cccc 1110 xxx1 xxxx xxxx xxxx xxx1 xxxx */ return INSN_REJECTED; } @@ -1598,17 +1584,9 @@ arm_kprobe_decode_insn(kprobe_opcode_t insn, struct arch_specific_insn *asi) return space_cccc_101x(insn, asi); - } else if ((insn & 0x0fe00000) == 0x0c400000) { - - return space_cccc_1100_010x(insn, asi); - - } else if ((insn & 0x0e000000) == 0x0c000000) { - - return space_cccc_110x(insn, asi); - } - return space_cccc_111x(insn, asi); + return space_cccc_11xx(insn, asi); } void __init arm_kprobe_decode_init(void) |