ARM: kprobes: Migrate ARM space_cccc_000x to decoding tables
Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
This commit is contained in:
Jon Medhurst
Tixy
parent
6c8a192929
commit
75f115c087
@ -997,7 +997,99 @@ static const union decode_item arm_1111_table[] = {
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DECODE_END
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};
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static const union decode_item arm_cccc_0001_0xx0____0xxx_table[] = {
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/* Miscellaneous instructions */
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/* MRS cpsr cccc 0001 0000 xxxx xxxx xxxx 0000 xxxx */
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DECODE_SIMULATEX(0x0ff000f0, 0x01000000, simulate_mrs,
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REGS(0, NOPC, 0, 0, 0)),
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/* BX cccc 0001 0010 xxxx xxxx xxxx 0001 xxxx */
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DECODE_SIMULATE (0x0ff000f0, 0x01200010, simulate_blx2bx),
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/* BLX (register) cccc 0001 0010 xxxx xxxx xxxx 0011 xxxx */
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DECODE_SIMULATEX(0x0ff000f0, 0x01200030, simulate_blx2bx,
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REGS(0, 0, 0, 0, NOPC)),
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/* CLZ cccc 0001 0110 xxxx xxxx xxxx 0001 xxxx */
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DECODE_CUSTOM (0x0ff000f0, 0x01600010, prep_emulate_rd12rm0),
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/* QADD cccc 0001 0000 xxxx xxxx xxxx 0101 xxxx */
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/* QSUB cccc 0001 0010 xxxx xxxx xxxx 0101 xxxx */
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/* QDADD cccc 0001 0100 xxxx xxxx xxxx 0101 xxxx */
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/* QDSUB cccc 0001 0110 xxxx xxxx xxxx 0101 xxxx */
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DECODE_CUSTOM (0x0f9000f0, 0x01000050, prep_emulate_rd12rn16rm0_wflags),
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/* BXJ cccc 0001 0010 xxxx xxxx xxxx 0010 xxxx */
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/* MSR cccc 0001 0x10 xxxx xxxx xxxx 0000 xxxx */
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/* MRS spsr cccc 0001 0100 xxxx xxxx xxxx 0000 xxxx */
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/* BKPT 1110 0001 0010 xxxx xxxx xxxx 0111 xxxx */
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/* SMC cccc 0001 0110 xxxx xxxx xxxx 0111 xxxx */
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/* And unallocated instructions... */
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DECODE_END
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};
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static const union decode_item arm_cccc_0001_0xx0____1xx0_table[] = {
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/* Halfword multiply and multiply-accumulate */
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/* SMLALxy cccc 0001 0100 xxxx xxxx xxxx 1xx0 xxxx */
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DECODE_CUSTOM (0x0ff00090, 0x01400080, prep_emulate_rdhi16rdlo12rs8rm0_wflags),
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/* SMULWy cccc 0001 0010 xxxx xxxx xxxx 1x10 xxxx */
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DECODE_OR (0x0ff000b0, 0x012000a0),
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/* SMULxy cccc 0001 0110 xxxx xxxx xxxx 1xx0 xxxx */
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DECODE_CUSTOM (0x0ff00090, 0x01600080, prep_emulate_rd16rs8rm0_wflags),
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/* SMLAxy cccc 0001 0000 xxxx xxxx xxxx 1xx0 xxxx */
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DECODE_OR (0x0ff00090, 0x01000080),
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/* SMLAWy cccc 0001 0010 xxxx xxxx xxxx 1x00 xxxx */
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DECODE_CUSTOM (0x0ff000b0, 0x01200080, prep_emulate_rd16rn12rs8rm0_wflags),
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DECODE_END
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};
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static const union decode_item arm_cccc_0000_____1001_table[] = {
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/* Multiply and multiply-accumulate */
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/* MUL cccc 0000 0000 xxxx xxxx xxxx 1001 xxxx */
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/* MULS cccc 0000 0001 xxxx xxxx xxxx 1001 xxxx */
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DECODE_CUSTOM (0x0fe000f0, 0x00000090, prep_emulate_rd16rs8rm0_wflags),
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/* MLA cccc 0000 0010 xxxx xxxx xxxx 1001 xxxx */
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/* MLAS cccc 0000 0011 xxxx xxxx xxxx 1001 xxxx */
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DECODE_OR (0x0fe000f0, 0x00200090),
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/* MLS cccc 0000 0110 xxxx xxxx xxxx 1001 xxxx */
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DECODE_CUSTOM (0x0ff000f0, 0x00600090, prep_emulate_rd16rn12rs8rm0_wflags),
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/* UMAAL cccc 0000 0100 xxxx xxxx xxxx 1001 xxxx */
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DECODE_OR (0x0ff000f0, 0x00400090),
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/* UMULL cccc 0000 1000 xxxx xxxx xxxx 1001 xxxx */
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/* UMULLS cccc 0000 1001 xxxx xxxx xxxx 1001 xxxx */
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/* UMLAL cccc 0000 1010 xxxx xxxx xxxx 1001 xxxx */
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/* UMLALS cccc 0000 1011 xxxx xxxx xxxx 1001 xxxx */
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/* SMULL cccc 0000 1100 xxxx xxxx xxxx 1001 xxxx */
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/* SMULLS cccc 0000 1101 xxxx xxxx xxxx 1001 xxxx */
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/* SMLAL cccc 0000 1110 xxxx xxxx xxxx 1001 xxxx */
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/* SMLALS cccc 0000 1111 xxxx xxxx xxxx 1001 xxxx */
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DECODE_CUSTOM (0x0f8000f0, 0x00800090, prep_emulate_rdhi16rdlo12rs8rm0_wflags),
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DECODE_END
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};
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static const union decode_item arm_cccc_0001_____1001_table[] = {
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/* Synchronization primitives */
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/* SMP/SWPB cccc 0001 0x00 xxxx xxxx xxxx 1001 xxxx */
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DECODE_CUSTOM (0x0fb000f0, 0x01000090, prep_emulate_rd12rn16rm0_wflags),
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/* LDREX/STREX{,D,B,H} cccc 0001 1xxx xxxx xxxx xxxx 1001 xxxx */
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/* And unallocated instructions... */
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DECODE_END
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};
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static const union decode_item arm_cccc_000x_____1xx1_table[] = {
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/* Extra load/store instructions */
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/* LDRD/STRD lr,pc,{... cccc 000x x0x0 xxxx 111x xxxx 1101 xxxx */
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DECODE_REJECT (0x0e10e0d0, 0x0000e0d0),
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@ -1011,6 +1103,20 @@ static const union decode_item arm_cccc_000x_____1xx1_table[] = {
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DECODE_EMULATEX (0x0e5000d0, 0x004000d0, emulate_ldrdstrd,
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REGS(NOPCWB, NOPCX, 0, 0, 0)),
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/* Reject Rd is PC */
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/* TODO: fold this into next entry when it is made a DECODE_EMULATE */
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DECODE_REJECT (0x0000f000, 0x0000f000),
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/* STRH (register) cccc 000x x0x0 xxxx xxxx xxxx 1011 xxxx */
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/* LDRH (register) cccc 000x x0x1 xxxx xxxx xxxx 1011 xxxx */
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/* LDRSB (register) cccc 000x x0x1 xxxx xxxx xxxx 1101 xxxx */
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/* LDRSH (register) cccc 000x x0x1 xxxx xxxx xxxx 1111 xxxx */
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/* STRH (immediate) cccc 000x x1x0 xxxx xxxx xxxx 1011 xxxx */
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/* LDRH (immediate) cccc 000x x1x1 xxxx xxxx xxxx 1011 xxxx */
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/* LDRSB (immediate) cccc 000x x1x1 xxxx xxxx xxxx 1101 xxxx */
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/* LDRSH (immediate) cccc 000x x1x1 xxxx xxxx xxxx 1111 xxxx */
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DECODE_CUSTOM (0x0e000090, 0x00000090, prep_emulate_ldr_str),
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DECODE_END
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};
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@ -1079,146 +1185,20 @@ static const union decode_item arm_cccc_000x_table[] = {
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static enum kprobe_insn __kprobes
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space_cccc_000x(kprobe_opcode_t insn, struct arch_specific_insn *asi)
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{
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/* cccc 0001 0xx0 xxxx xxxx xxxx xxxx xxx0 xxxx */
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if ((insn & 0x0f900010) == 0x01000000) {
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if ((insn & 0x0f900080) == 0x01000000)
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return kprobe_decode_insn(insn, asi, arm_cccc_0001_0xx0____0xxx_table, false);
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/* MRS cpsr : cccc 0001 0000 xxxx xxxx xxxx 0000 xxxx */
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if ((insn & 0x0ff000f0) == 0x01000000) {
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if (is_r15(insn, 12))
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return INSN_REJECTED; /* Rd is PC */
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asi->insn_handler = simulate_mrs;
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return INSN_GOOD_NO_SLOT;
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}
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if ((insn & 0x0f900090) == 0x01000080)
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return kprobe_decode_insn(insn, asi, arm_cccc_0001_0xx0____1xx0_table, false);
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/* SMLALxy : cccc 0001 0100 xxxx xxxx xxxx 1xx0 xxxx */
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if ((insn & 0x0ff00090) == 0x01400080)
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return prep_emulate_rdhi16rdlo12rs8rm0_wflags(insn,
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asi);
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if ((insn & 0x0f0000f0) == 0x00000090)
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return kprobe_decode_insn(insn, asi, arm_cccc_0000_____1001_table, false);
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/* SMULWy : cccc 0001 0010 xxxx xxxx xxxx 1x10 xxxx */
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/* SMULxy : cccc 0001 0110 xxxx xxxx xxxx 1xx0 xxxx */
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if ((insn & 0x0ff000b0) == 0x012000a0 ||
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(insn & 0x0ff00090) == 0x01600080)
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return prep_emulate_rd16rs8rm0_wflags(insn, asi);
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if ((insn & 0x0f0000f0) == 0x01000090)
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return kprobe_decode_insn(insn, asi, arm_cccc_0001_____1001_table, false);
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/* SMLAxy : cccc 0001 0000 xxxx xxxx xxxx 1xx0 xxxx : Q */
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/* SMLAWy : cccc 0001 0010 xxxx xxxx xxxx 1x00 xxxx : Q */
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if ((insn & 0x0ff00090) == 0x01000080 ||
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(insn & 0x0ff000b0) == 0x01200080)
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return prep_emulate_rd16rn12rs8rm0_wflags(insn, asi);
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/* BXJ : cccc 0001 0010 xxxx xxxx xxxx 0010 xxxx */
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/* MSR : cccc 0001 0x10 xxxx xxxx xxxx 0000 xxxx */
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/* MRS spsr : cccc 0001 0100 xxxx xxxx xxxx 0000 xxxx */
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/* Other instruction encodings aren't yet defined */
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return INSN_REJECTED;
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}
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/* cccc 0001 0xx0 xxxx xxxx xxxx xxxx 0xx1 xxxx */
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else if ((insn & 0x0f900090) == 0x01000010) {
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/* BLX(2) : cccc 0001 0010 xxxx xxxx xxxx 0011 xxxx */
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/* BX : cccc 0001 0010 xxxx xxxx xxxx 0001 xxxx */
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if ((insn & 0x0ff000d0) == 0x01200010) {
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if ((insn & 0x0ff000ff) == 0x0120003f)
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return INSN_REJECTED; /* BLX pc */
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asi->insn_handler = simulate_blx2bx;
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return INSN_GOOD_NO_SLOT;
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}
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/* CLZ : cccc 0001 0110 xxxx xxxx xxxx 0001 xxxx */
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if ((insn & 0x0ff000f0) == 0x01600010)
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return prep_emulate_rd12rm0(insn, asi);
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/* QADD : cccc 0001 0000 xxxx xxxx xxxx 0101 xxxx :Q */
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/* QSUB : cccc 0001 0010 xxxx xxxx xxxx 0101 xxxx :Q */
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/* QDADD : cccc 0001 0100 xxxx xxxx xxxx 0101 xxxx :Q */
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/* QDSUB : cccc 0001 0110 xxxx xxxx xxxx 0101 xxxx :Q */
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if ((insn & 0x0f9000f0) == 0x01000050)
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return prep_emulate_rd12rn16rm0_wflags(insn, asi);
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/* BKPT : 1110 0001 0010 xxxx xxxx xxxx 0111 xxxx */
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/* SMC : cccc 0001 0110 xxxx xxxx xxxx 0111 xxxx */
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/* Other instruction encodings aren't yet defined */
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return INSN_REJECTED;
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}
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/* cccc 0000 xxxx xxxx xxxx xxxx xxxx 1001 xxxx */
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else if ((insn & 0x0f0000f0) == 0x00000090) {
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/* MUL : cccc 0000 0000 xxxx xxxx xxxx 1001 xxxx : */
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/* MULS : cccc 0000 0001 xxxx xxxx xxxx 1001 xxxx :cc */
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/* MLA : cccc 0000 0010 xxxx xxxx xxxx 1001 xxxx : */
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/* MLAS : cccc 0000 0011 xxxx xxxx xxxx 1001 xxxx :cc */
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/* UMAAL : cccc 0000 0100 xxxx xxxx xxxx 1001 xxxx : */
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/* undef : cccc 0000 0101 xxxx xxxx xxxx 1001 xxxx : */
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/* MLS : cccc 0000 0110 xxxx xxxx xxxx 1001 xxxx : */
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/* undef : cccc 0000 0111 xxxx xxxx xxxx 1001 xxxx : */
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/* UMULL : cccc 0000 1000 xxxx xxxx xxxx 1001 xxxx : */
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/* UMULLS : cccc 0000 1001 xxxx xxxx xxxx 1001 xxxx :cc */
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/* UMLAL : cccc 0000 1010 xxxx xxxx xxxx 1001 xxxx : */
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/* UMLALS : cccc 0000 1011 xxxx xxxx xxxx 1001 xxxx :cc */
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/* SMULL : cccc 0000 1100 xxxx xxxx xxxx 1001 xxxx : */
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/* SMULLS : cccc 0000 1101 xxxx xxxx xxxx 1001 xxxx :cc */
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/* SMLAL : cccc 0000 1110 xxxx xxxx xxxx 1001 xxxx : */
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/* SMLALS : cccc 0000 1111 xxxx xxxx xxxx 1001 xxxx :cc */
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if ((insn & 0x00d00000) == 0x00500000)
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return INSN_REJECTED;
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else if ((insn & 0x00e00000) == 0x00000000)
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return prep_emulate_rd16rs8rm0_wflags(insn, asi);
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else if ((insn & 0x00a00000) == 0x00200000)
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return prep_emulate_rd16rn12rs8rm0_wflags(insn, asi);
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else
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return prep_emulate_rdhi16rdlo12rs8rm0_wflags(insn,
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asi);
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}
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/* cccc 000x xxxx xxxx xxxx xxxx xxxx 1xx1 xxxx */
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else if ((insn & 0x0e000090) == 0x00000090) {
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/* SWP : cccc 0001 0000 xxxx xxxx xxxx 1001 xxxx */
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/* SWPB : cccc 0001 0100 xxxx xxxx xxxx 1001 xxxx */
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/* ??? : cccc 0001 0x01 xxxx xxxx xxxx 1001 xxxx */
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/* ??? : cccc 0001 0x10 xxxx xxxx xxxx 1001 xxxx */
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/* ??? : cccc 0001 0x11 xxxx xxxx xxxx 1001 xxxx */
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/* STREX : cccc 0001 1000 xxxx xxxx xxxx 1001 xxxx */
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/* LDREX : cccc 0001 1001 xxxx xxxx xxxx 1001 xxxx */
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/* STREXD: cccc 0001 1010 xxxx xxxx xxxx 1001 xxxx */
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/* LDREXD: cccc 0001 1011 xxxx xxxx xxxx 1001 xxxx */
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/* STREXB: cccc 0001 1100 xxxx xxxx xxxx 1001 xxxx */
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/* LDREXB: cccc 0001 1101 xxxx xxxx xxxx 1001 xxxx */
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/* STREXH: cccc 0001 1110 xxxx xxxx xxxx 1001 xxxx */
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/* LDREXH: cccc 0001 1111 xxxx xxxx xxxx 1001 xxxx */
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/* LDRD : cccc 000x xxx0 xxxx xxxx xxxx 1101 xxxx */
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/* STRD : cccc 000x xxx0 xxxx xxxx xxxx 1111 xxxx */
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/* LDRH : cccc 000x xxx1 xxxx xxxx xxxx 1011 xxxx */
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/* STRH : cccc 000x xxx0 xxxx xxxx xxxx 1011 xxxx */
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/* LDRSB : cccc 000x xxx1 xxxx xxxx xxxx 1101 xxxx */
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/* LDRSH : cccc 000x xxx1 xxxx xxxx xxxx 1111 xxxx */
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if ((insn & 0x0f0000f0) == 0x01000090) {
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if ((insn & 0x0fb000f0) == 0x01000090) {
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/* SWP/SWPB */
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return prep_emulate_rd12rn16rm0_wflags(insn,
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asi);
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} else {
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/* STREX/LDREX variants and unallocaed space */
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return INSN_REJECTED;
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}
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} else if ((insn & 0x0e1000d0) == 0x00000d0) {
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return kprobe_decode_insn(insn, asi, arm_cccc_000x_____1xx1_table,
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false);
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}
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/* LDRH/STRH/LDRSB/LDRSH */
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if (is_r15(insn, 12))
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return INSN_REJECTED; /* Rd is PC */
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return prep_emulate_ldr_str(insn, asi);
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}
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if ((insn & 0x0e000090) == 0x00000090)
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return kprobe_decode_insn(insn, asi, arm_cccc_000x_____1xx1_table, false);
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return kprobe_decode_insn(insn, asi, arm_cccc_000x_table, false);
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}
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