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kprobes/arm: fix decoding of arithmetic immediate instructions 

The ARM kprobes arithmetic immediate instruction decoder
(space_cccc_001x()) was accidentally zero'ing out not only the Rn and
Rd arguments, but the lower nibble of the immediate argument as well
-- this patch fixes this.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Acked-by: Nicolas Pitre <nico@marvell.com>
This commit is contained in:
Lennert Buytenhek 2008-04-24 01:31:45 -04:00 committed by Nicolas Pitre
parent 8f79ff0cb5
commit a3fd133c24
1 changed files with 1 additions and 1 deletions
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2
arch/arm/kernel/kprobes-decode.c
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@ -1176,7 +1176,7 @@ space_cccc_001x(kprobe_opcode_t insn, struct arch_specific_insn *asi)
* *S (bit 20) updates condition codes
* ADC/SBC/RSC reads the C flag
*/
insn &= 0xfff00ff0; /* Rn = r0, Rd = r0 */
insn &= 0xfff00fff; /* Rn = r0, Rd = r0 */
asi->insn[0] = insn;
asi->insn_handler = (insn & (1 << 20)) ? /* S-bit */
emulate_alu_imm_rwflags : emulate_alu_imm_rflags;