diff options
| author | Jon Medhurst <tixy@yxit.co.uk> | 2011-07-03 15:15:59 +0100 |
|---|---|---|
| committer | Tixy <tixy@medhuaa1.miniserver.com> | 2011-07-13 17:32:48 +0000 |
| commit | bb1085f82710f0194bf8a1b587c96ecae7f131f8 (patch) | |
| tree | 9bb725b3e65bc7ce509e589bedd6c06e18f5abea /arch/arm/kernel | |
| parent | 231fb150c6f8a1f226380affc5498dd9abffc9d7 (diff) | |
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>
Diffstat (limited to 'arch/arm/kernel')
| -rw-r--r-- | arch/arm/kernel/kprobes-thumb.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/arch/arm/kernel/kprobes-thumb.c b/arch/arm/kernel/kprobes-thumb.c index 4ef12d13c7d0..902ca59e8b11 100644 --- a/arch/arm/kernel/kprobes-thumb.c +++ b/arch/arm/kernel/kprobes-thumb.c @@ -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 */ @@ -883,6 +926,12 @@ 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 */ |