ARM: kprobes: Fix emulation of SMUAD, SMUSD and SMMUL instructions
The signed multiply instructions were being decoded incorrectly. Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org>
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@ -1436,18 +1436,26 @@ space_cccc_0111__1(kprobe_opcode_t insn, struct arch_specific_insn *asi)
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return prep_emulate_rdhi16rdlo12rs8rm0_wflags(insn, asi);
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/* SMLAD : cccc 0111 0000 xxxx xxxx xxxx 00x1 xxxx :Q */
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/* SMUAD : cccc 0111 0000 xxxx 1111 xxxx 00x1 xxxx :Q */
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/* SMLSD : cccc 0111 0000 xxxx xxxx xxxx 01x1 xxxx :Q */
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/* SMUSD : cccc 0111 0000 xxxx 1111 xxxx 01x1 xxxx : */
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/* SMMLA : cccc 0111 0101 xxxx xxxx xxxx 00x1 xxxx : */
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/* SMMLS : cccc 0111 0101 xxxx xxxx xxxx 11x1 xxxx : */
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/* SMMUL : cccc 0111 0101 xxxx 1111 xxxx 00x1 xxxx : */
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if ((insn & 0x0ff00090) == 0x07000010 ||
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(insn & 0x0ff000d0) == 0x07500010 ||
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(insn & 0x0ff000d0) == 0x075000d0)
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(insn & 0x0ff000d0) == 0x07500010) {
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if ((insn & 0x0000f000) == 0x0000f000) {
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return prep_emulate_rd16rs8rm0_wflags(insn, asi);
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} else {
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return prep_emulate_rd16rn12rs8rm0_wflags(insn, asi);
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}
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}
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/* SMMLS : cccc 0111 0101 xxxx xxxx xxxx 11x1 xxxx : */
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if ((insn & 0x0ff000d0) == 0x075000d0)
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return prep_emulate_rd16rn12rs8rm0_wflags(insn, asi);
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/* SMUSD : cccc 0111 0000 xxxx xxxx xxxx 01x1 xxxx : */
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/* SMUAD : cccc 0111 0000 xxxx 1111 xxxx 00x1 xxxx :Q */
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/* SMMUL : cccc 0111 0101 xxxx 1111 xxxx 00x1 xxxx : */
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return prep_emulate_rd16rs8rm0_wflags(insn, asi);
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return INSN_REJECTED;
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}
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static enum kprobe_insn __kprobes
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