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ARM: kprobes: Decode 32-bit Thumb multiply and absolute difference instructions 

Signed-off-by: Jon Medhurst <tixy@yxit.co.uk>
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
This commit is contained in:
Jon Medhurst 2011-07-03 15:15:59 +01:00 committed by Tixy
parent 231fb150c6
commit bb1085f827
1 changed files with 49 additions and 0 deletions
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49
arch/arm/kernel/kprobes-thumb.c
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@ -315,6 +315,10 @@ t32_emulate_rdlo12rdhi8rn16rm0_noflags(struct kprobe *p, struct pt_regs *regs)
regs->uregs[rdhi] = rdhiv;
}
/* These emulation encodings are functionally equivalent... */
#define t32_emulate_rd8rn16rm0ra12_noflags \
t32_emulate_rdlo12rdhi8rn16rm0_noflags
static const union decode_item t32_table_1110_100x_x0xx[] = {
/* Load/store multiple instructions */
@ -789,6 +793,45 @@ static const union decode_item t32_table_1111_1010___1111[] = {
DECODE_END
};
static const union decode_item t32_table_1111_1011_0[] = {
/* Multiply, multiply accumulate, and absolute difference */
/* ??? 1111 1011 0000 xxxx 1111 xxxx 0001 xxxx */
DECODE_REJECT (0xfff0f0f0, 0xfb00f010),
/* ??? 1111 1011 0111 xxxx 1111 xxxx 0001 xxxx */
DECODE_REJECT (0xfff0f0f0, 0xfb70f010),
/* SMULxy 1111 1011 0001 xxxx 1111 xxxx 00xx xxxx */
DECODE_OR (0xfff0f0c0, 0xfb10f000),
/* MUL 1111 1011 0000 xxxx 1111 xxxx 0000 xxxx */
/* SMUAD{X} 1111 1011 0010 xxxx 1111 xxxx 000x xxxx */
/* SMULWy 1111 1011 0011 xxxx 1111 xxxx 000x xxxx */
/* SMUSD{X} 1111 1011 0100 xxxx 1111 xxxx 000x xxxx */
/* SMMUL{R} 1111 1011 0101 xxxx 1111 xxxx 000x xxxx */
/* USAD8 1111 1011 0111 xxxx 1111 xxxx 0000 xxxx */
DECODE_EMULATEX (0xff80f0e0, 0xfb00f000, t32_emulate_rd8rn16rm0_rwflags,
REGS(NOSPPC, 0, NOSPPC, 0, NOSPPC)),
/* ??? 1111 1011 0111 xxxx xxxx xxxx 0001 xxxx */
DECODE_REJECT (0xfff000f0, 0xfb700010),
/* SMLAxy 1111 1011 0001 xxxx xxxx xxxx 00xx xxxx */
DECODE_OR (0xfff000c0, 0xfb100000),
/* MLA 1111 1011 0000 xxxx xxxx xxxx 0000 xxxx */
/* MLS 1111 1011 0000 xxxx xxxx xxxx 0001 xxxx */
/* SMLAD{X} 1111 1011 0010 xxxx xxxx xxxx 000x xxxx */
/* SMLAWy 1111 1011 0011 xxxx xxxx xxxx 000x xxxx */
/* SMLSD{X} 1111 1011 0100 xxxx xxxx xxxx 000x xxxx */
/* SMMLA{R} 1111 1011 0101 xxxx xxxx xxxx 000x xxxx */
/* SMMLS{R} 1111 1011 0110 xxxx xxxx xxxx 000x xxxx */
/* USADA8 1111 1011 0111 xxxx xxxx xxxx 0000 xxxx */
DECODE_EMULATEX (0xff8000c0, 0xfb000000, t32_emulate_rd8rn16rm0ra12_noflags,
REGS(NOSPPC, NOSPPCX, NOSPPC, 0, NOSPPC)),
/* Other unallocated instructions... */
DECODE_END
};
static const union decode_item t32_table_1111_1011_1[] = {
/* Long multiply, long multiply accumulate, and divide */
@ -882,6 +925,12 @@ const union decode_item kprobe_decode_thumb32_table[] = {
*/
DECODE_TABLE (0xff00f000, 0xfa00f000, t32_table_1111_1010___1111),
/*
* Multiply, multiply accumulate, and absolute difference
* 1111 1011 0xxx xxxx xxxx xxxx xxxx xxxx
*/
DECODE_TABLE (0xff800000, 0xfb000000, t32_table_1111_1011_0),
/*
* Long multiply, long multiply accumulate, and divide
* 1111 1011 1xxx xxxx xxxx xxxx xxxx xxxx