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ARM: kprobes: Migrate ARM LDRD and STRD to decoding tables

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Signed-off-by: Jon Medhurst <tixy@yxit.co.uk>
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
This commit is contained in:
Jon Medhurst 2011-06-06 15:07:42 +01:00 committed by Tixy
parent 8723942f7b
commit 6c8a192929
1 changed files with 19 additions and 16 deletions
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35
arch/arm/kernel/kprobes-arm.c
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@ -997,6 +997,23 @@ static const union decode_item arm_1111_table[] = {
DECODE_END
};
static const union decode_item arm_cccc_000x_____1xx1_table[] = {
/* LDRD/STRD lr,pc,{... cccc 000x x0x0 xxxx 111x xxxx 1101 xxxx */
DECODE_REJECT (0x0e10e0d0, 0x0000e0d0),
/* LDRD (register) cccc 000x x0x0 xxxx xxxx xxxx 1101 xxxx */
/* STRD (register) cccc 000x x0x0 xxxx xxxx xxxx 1111 xxxx */
DECODE_EMULATEX (0x0e5000d0, 0x000000d0, emulate_ldrdstrd,
REGS(NOPCWB, NOPCX, 0, 0, NOPC)),
/* LDRD (immediate) cccc 000x x1x0 xxxx xxxx xxxx 1101 xxxx */
/* STRD (immediate) cccc 000x x1x0 xxxx xxxx xxxx 1111 xxxx */
DECODE_EMULATEX (0x0e5000d0, 0x004000d0, emulate_ldrdstrd,
REGS(NOPCWB, NOPCX, 0, 0, 0)),
DECODE_END
};
static const union decode_item arm_cccc_000x_table[] = {
/* Data-processing (register) */
@ -1192,23 +1209,9 @@ space_cccc_000x(kprobe_opcode_t insn, struct arch_specific_insn *asi)
}
} else if ((insn & 0x0e1000d0) == 0x00000d0) {
/* STRD/LDRD */
if ((insn & 0x0000e000) == 0x0000e000)
return INSN_REJECTED; /* Rd is LR or PC */
if (is_writeback(insn) && is_r15(insn, 16))
return INSN_REJECTED; /* Writeback to PC */
insn &= 0xfff00fff;
insn |= 0x00002000; /* Rn = r0, Rd = r2 */
if (!(insn & (1 << 22))) {
/* Register index */
insn &= ~0xf;
insn |= 1; /* Rm = r1 */
}
asi->insn[0] = insn;
asi->insn_handler =
(insn & (1 << 5)) ? emulate_strd : emulate_ldrd;
return INSN_GOOD;
return kprobe_decode_insn(insn, asi, arm_cccc_000x_____1xx1_table,
false);
}
/* LDRH/STRH/LDRSB/LDRSH */