diff options
| author | Jon Medhurst <tixy@yxit.co.uk> | 2011-07-03 14:00:42 (GMT) |
|---|---|---|
| committer | Tixy <tixy@medhuaa1.miniserver.com> | 2011-07-13 17:32:47 (GMT) |
| commit | 46009cc5c59e0acdf165ed8a9d1ccc43baf44800 (patch) | |
| tree | c73015049440b01318f29bd74529dac1ed07d2cd | |
| parent | 6a0d1a1c5692d6192684fb7aa8f4d7f401f8dbab (diff) | |
| download | linux-fsl-qoriq-46009cc5c59e0acdf165ed8a9d1ccc43baf44800.tar.xz | |
ARM: kprobes: Decode 32-bit Thumb memory hint instructions
We'll treat the preload instructions as nops as they are just
performance hints.
Signed-off-by: Jon Medhurst <tixy@yxit.co.uk>
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
| -rw-r--r-- | arch/arm/kernel/kprobes-thumb.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/arm/kernel/kprobes-thumb.c b/arch/arm/kernel/kprobes-thumb.c index 6cc51b4..bf1113c 100644 --- a/arch/arm/kernel/kprobes-thumb.c +++ b/arch/arm/kernel/kprobes-thumb.c @@ -489,6 +489,33 @@ static const union decode_item t32_table_1111_0xxx___1[] = { DECODE_END }; +static const union decode_item t32_table_1111_100x_x0x1__1111[] = { + /* Memory hints */ + + /* PLD (literal) 1111 1000 x001 1111 1111 xxxx xxxx xxxx */ + /* PLI (literal) 1111 1001 x001 1111 1111 xxxx xxxx xxxx */ + DECODE_SIMULATE (0xfe7ff000, 0xf81ff000, kprobe_simulate_nop), + + /* PLD{W} (immediate) 1111 1000 10x1 xxxx 1111 xxxx xxxx xxxx */ + DECODE_OR (0xffd0f000, 0xf890f000), + /* PLD{W} (immediate) 1111 1000 00x1 xxxx 1111 1100 xxxx xxxx */ + DECODE_OR (0xffd0ff00, 0xf810fc00), + /* PLI (immediate) 1111 1001 1001 xxxx 1111 xxxx xxxx xxxx */ + DECODE_OR (0xfff0f000, 0xf990f000), + /* PLI (immediate) 1111 1001 0001 xxxx 1111 1100 xxxx xxxx */ + DECODE_SIMULATEX(0xfff0ff00, 0xf910fc00, kprobe_simulate_nop, + REGS(NOPCX, 0, 0, 0, 0)), + + /* PLD{W} (register) 1111 1000 00x1 xxxx 1111 0000 00xx xxxx */ + DECODE_OR (0xffd0ffc0, 0xf810f000), + /* PLI (register) 1111 1001 0001 xxxx 1111 0000 00xx xxxx */ + DECODE_SIMULATEX(0xfff0ffc0, 0xf910f000, kprobe_simulate_nop, + REGS(NOPCX, 0, 0, 0, NOSPPC)), + + /* Other unallocated instructions... */ + DECODE_END +}; + const union decode_item kprobe_decode_thumb32_table[] = { /* @@ -540,6 +567,12 @@ const union decode_item kprobe_decode_thumb32_table[] = { DECODE_REJECT (0xff100000, 0xf9000000), /* + * Memory hints + * 1111 100x x0x1 xxxx 1111 xxxx xxxx xxxx + */ + DECODE_TABLE (0xfe50f000, 0xf810f000, t32_table_1111_100x_x0x1__1111), + + /* * Coprocessor instructions * 1111 11xx xxxx xxxx xxxx xxxx xxxx xxxx */ |