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From: tixy@yxit.co.uk (Tixy)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 47/51] ARM: kprobes: Decode 32-bit Thumb memory hint instructions
Date: Sat,  9 Jul 2011 11:57:34 +0100	[thread overview]
Message-ID: <1310209058-20980-48-git-send-email-tixy@yxit.co.uk> (raw)
In-Reply-To: <1310209058-20980-1-git-send-email-tixy@yxit.co.uk>

From: Jon Medhurst <tixy@yxit.co.uk>

We'll treat the preload instructions as nops as they are just
performance hints.

Signed-off-by: Jon Medhurst <tixy@yxit.co.uk>
---
 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
 	 */
-- 
1.7.2.5

  parent reply	other threads:[~2011-07-09 10:57 UTC|newest]

Thread overview: 65+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-07-09 10:56 ARM: kprobes: Add support for Thumb-2 Tixy
2011-07-09 10:56 ` [PATCH 01/51] ARM: Thumb-2: Fix exception return sequence to restore stack correctly Tixy
2011-07-11 18:07   ` Nicolas Pitre
2011-07-09 10:56 ` [PATCH 02/51] ARM: Thumb-2: Support Thumb-2 in undefined instruction handler Tixy
2011-07-11 18:14   ` Nicolas Pitre
2011-07-09 10:56 ` [PATCH 03/51] ARM: kprobes: Rename kprobes-decode.c to kprobes-arm.c Tixy
2011-07-09 10:56 ` [PATCH 04/51] ARM: kprobes: Split out internal parts of kprobes.h Tixy
2011-07-09 10:56 ` [PATCH 05/51] ARM: kprobes: Add kprobes-common.c Tixy
2011-07-09 10:56 ` [PATCH 06/51] ARM: kprobes: Move is_writeback define to header file Tixy
2011-07-09 10:56 ` [PATCH 07/51] ARM: kprobes: Move find_str_pc_offset into kprobes-common.c Tixy
2011-07-09 10:56 ` [PATCH 08/51] ARM: kprobes: Make str_pc_offset a constant on ARMv7 Tixy
2011-07-09 10:56 ` [PATCH 09/51] ARM: kprobes: Make kprobes framework work on Thumb-2 kernels Tixy
2011-07-09 10:56 ` [PATCH 10/51] ARM: kprobes: Add Thumb instruction decoding stubs Tixy
2011-07-09 10:56 ` [PATCH 11/51] ARM: Kconfig: Allow kprobes on Thumb-2 kernels Tixy
2011-07-11 11:01   ` Sergei Shtylyov
2011-07-11 11:33     ` Tixy
2011-07-11 11:42       ` Russell King - ARM Linux
2011-07-11 11:47         ` Tixy
2011-07-09 10:56 ` [PATCH 12/51] ARM: kprobes: Add Thumb breakpoint support Tixy
2011-07-09 10:57 ` [PATCH 13/51] ARM: kprobes: Add condition code checking to Thumb emulation Tixy
2011-07-09 10:57 ` [PATCH 14/51] ARM: kprobes: Add it_advance() Tixy
2011-07-09 10:57 ` [PATCH 15/51] ARM: kprobes: Don't trigger probes on conditional instructions when condition is false Tixy
2011-07-11 19:04   ` Nicolas Pitre
2011-07-09 10:57 ` [PATCH 16/51] ARM: kprobes: Use conditional breakpoints for ARM probes Tixy
2011-07-09 10:57 ` [PATCH 17/51] ARM: kprobes: Add hooks to override singlestep() Tixy
2011-07-09 10:57 ` [PATCH 18/51] ARM: kprobes: Extend arch_specific_insn to add pointer to emulated instruction Tixy
2011-07-11 19:19   ` Nicolas Pitre
2011-07-09 10:57 ` [PATCH 19/51] ARM: kprobes: Infrastructure for table driven decoding of CPU instructions Tixy
2011-07-11 20:05   ` Nicolas Pitre
2011-07-12  7:14     ` Tixy
2011-07-09 10:57 ` [PATCH 20/51] ARM: kprobes: Decode 16-bit Thumb hint instructions Tixy
2011-07-09 10:57 ` [PATCH 21/51] ARM: ptrace: Add APSR_MASK definition to ptrace.h Tixy
2011-07-09 10:57 ` [PATCH 22/51] ARM: kprobes: Decode 16-bit Thumb data-processing instructions Tixy
2011-07-09 10:57 ` [PATCH 23/51] ARM: kprobes: Add bx_write_pc() Tixy
2011-07-09 10:57 ` [PATCH 24/51] ARM: kprobes: Decode 16-bit Thumb BX and BLX instructions Tixy
2011-07-09 10:57 ` [PATCH 25/51] ARM: kprobes: Decode 16-bit Thumb special data instructions Tixy
2011-07-09 10:57 ` [PATCH 26/51] ARM: kprobes: Decode 16-bit Thumb load and store instructions Tixy
2011-07-09 10:57 ` [PATCH 27/51] ARM: kprobes: Decode 16-bit Thumb PC- and SP-relative address instructions Tixy
2011-07-09 10:57 ` [PATCH 28/51] ARM: kprobes: Decode 16-bit Thumb CBZ and bit manipulation instructions Tixy
2011-07-09 10:57 ` [PATCH 29/51] ARM: kprobes: Decode 16-bit Thumb PUSH and POP instructions Tixy
2011-07-09 10:57 ` [PATCH 30/51] ARM: kprobes: Decode 16-bit Thumb IT instruction Tixy
2011-07-09 10:57 ` [PATCH 31/51] ARM: kprobes: Reject 16-bit Thumb SVC and UNDEFINED instructions Tixy
2011-07-09 10:57 ` [PATCH 32/51] ARM: kprobes: Decode 16-bit Thumb branch instructions Tixy
2011-07-09 10:57 ` [PATCH 33/51] ARM: kprobes: Reject 16-bit Thumb SETEND, CPS and BKPT instructions Tixy
2011-07-09 10:57 ` [PATCH 34/51] ARM: kprobes: Decode 32-bit Thumb hint instructions Tixy
2011-07-09 10:57 ` [PATCH 35/51] ARM: kprobes: Add load_write_pc() Tixy
2011-07-09 10:57 ` [PATCH 36/51] ARM: kprobes: Add common decoding function for LDM and STM Tixy
2011-07-09 10:57 ` [PATCH 37/51] ARM: kprobes: Optimise emulation of " Tixy
2011-07-12  0:45   ` Nicolas Pitre
2011-07-12  7:20     ` Tixy
2011-07-09 10:57 ` [PATCH 38/51] ARM: kprobes: Decode 32-bit Thumb load/store multiple instructions Tixy
2011-07-09 10:57 ` [PATCH 39/51] ARM: kprobes: Decode 32-bit Thumb load/store dual and load/store exclusive instructions Tixy
2011-07-09 10:57 ` [PATCH 40/51] ARM: kprobes: Decode 32-bit Thumb table branch instructions Tixy
2011-07-09 10:57 ` [PATCH 41/51] ARM: kprobes: Decode 32-bit Thumb data-processing (shifted register) instructions Tixy
2011-07-09 10:57 ` [PATCH 42/51] ARM: kprobes: Decode 32-bit Thumb data-processing (modified immediate) instructions Tixy
2011-07-09 10:57 ` [PATCH 43/51] ARM: kprobes: Decode 32-bit Thumb data-processing (plain binary " Tixy
2011-07-09 10:57 ` [PATCH 44/51] ARM: kprobes: Decode 32-bit miscellaneous control instructions Tixy
2011-07-09 10:57 ` [PATCH 45/51] ARM: kprobes: Decode 32-bit Thumb branch instructions Tixy
2011-07-09 10:57 ` [PATCH 46/51] ARM: kprobes: Reject 32-bit Thumb coprocessor and SIMD instructions Tixy
2011-07-09 10:57 ` Tixy [this message]
2011-07-09 10:57 ` [PATCH 48/51] ARM: kprobes: Decode 32-bit Thumb load/store single data item instructions Tixy
2011-07-09 10:57 ` [PATCH 49/51] ARM: kprobes: Decode 32-bit Thumb data-processing (register) instructions Tixy
2011-07-09 10:57 ` [PATCH 50/51] ARM: kprobes: Decode 32-bit Thumb long multiply and divide instructions Tixy
2011-07-09 10:57 ` [PATCH 51/51] ARM: kprobes: Decode 32-bit Thumb multiply and absolute difference instructions Tixy
2011-07-12  1:02 ` ARM: kprobes: Add support for Thumb-2 Nicolas Pitre

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