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-rw-r--r--arch/arm/Kconfig1
-rw-r--r--arch/arm/Makefile1
-rw-r--r--arch/arm/boot/dts/armada-370-db.dts24
-rw-r--r--arch/arm/configs/multi_v7_defconfig1
-rw-r--r--arch/arm/include/asm/insn.h (renamed from arch/arm/kernel/insn.h)0
-rw-r--r--arch/arm/include/asm/kprobes.h33
-rw-r--r--arch/arm/include/asm/patch.h (renamed from arch/arm/kernel/patch.h)0
-rw-r--r--arch/arm/include/asm/probes.h15
-rw-r--r--arch/arm/kernel/Makefile16
-rw-r--r--arch/arm/kernel/entry-armv.S3
-rw-r--r--arch/arm/kernel/ftrace.c3
-rw-r--r--arch/arm/kernel/jump_label.c5
-rw-r--r--arch/arm/kernel/kgdb.c3
-rw-r--r--arch/arm/kernel/patch.c3
-rw-r--r--arch/arm/kernel/setup.c9
-rw-r--r--arch/arm/kernel/smp.c12
-rw-r--r--arch/arm/probes/Makefile7
-rw-r--r--arch/arm/probes/decode-arm.c (renamed from arch/arm/kernel/probes-arm.c)18
-rw-r--r--arch/arm/probes/decode-arm.h (renamed from arch/arm/kernel/probes-arm.h)9
-rw-r--r--arch/arm/probes/decode-thumb.c (renamed from arch/arm/kernel/probes-thumb.c)16
-rw-r--r--arch/arm/probes/decode-thumb.h (renamed from arch/arm/kernel/probes-thumb.h)10
-rw-r--r--arch/arm/probes/decode.c (renamed from arch/arm/kernel/probes.c)81
-rw-r--r--arch/arm/probes/decode.h (renamed from arch/arm/kernel/probes.h)13
-rw-r--r--arch/arm/probes/kprobes/Makefile12
-rw-r--r--arch/arm/probes/kprobes/actions-arm.c (renamed from arch/arm/kernel/kprobes-arm.c)11
-rw-r--r--arch/arm/probes/kprobes/actions-common.c (renamed from arch/arm/kernel/kprobes-common.c)4
-rw-r--r--arch/arm/probes/kprobes/actions-thumb.c (renamed from arch/arm/kernel/kprobes-thumb.c)10
-rw-r--r--arch/arm/probes/kprobes/checkers-arm.c192
-rw-r--r--arch/arm/probes/kprobes/checkers-common.c101
-rw-r--r--arch/arm/probes/kprobes/checkers-thumb.c110
-rw-r--r--arch/arm/probes/kprobes/checkers.h55
-rw-r--r--arch/arm/probes/kprobes/core.c (renamed from arch/arm/kernel/kprobes.c)49
-rw-r--r--arch/arm/probes/kprobes/core.h (renamed from arch/arm/kernel/kprobes.h)12
-rw-r--r--arch/arm/probes/kprobes/opt-arm.c370
-rw-r--r--arch/arm/probes/kprobes/test-arm.c (renamed from arch/arm/kernel/kprobes-test-arm.c)40
-rw-r--r--arch/arm/probes/kprobes/test-core.c (renamed from arch/arm/kernel/kprobes-test.c)46
-rw-r--r--arch/arm/probes/kprobes/test-core.h (renamed from arch/arm/kernel/kprobes-test.h)35
-rw-r--r--arch/arm/probes/kprobes/test-thumb.c (renamed from arch/arm/kernel/kprobes-test-thumb.c)20
-rw-r--r--arch/arm/probes/uprobes/Makefile1
-rw-r--r--arch/arm/probes/uprobes/actions-arm.c (renamed from arch/arm/kernel/uprobes-arm.c)8
-rw-r--r--arch/arm/probes/uprobes/core.c (renamed from arch/arm/kernel/uprobes.c)8
-rw-r--r--arch/arm/probes/uprobes/core.h (renamed from arch/arm/kernel/uprobes.h)0
42 files changed, 1216 insertions, 151 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index c3a986d45125..1f5eb9aee750 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -61,6 +61,7 @@ config ARM
select HAVE_MEMBLOCK
select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
+ select HAVE_OPTPROBES if !THUMB2_KERNEL
select HAVE_PERF_EVENTS
select HAVE_PERF_REGS
select HAVE_PERF_USER_STACK_DUMP
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index c1785eec2cf7..7f99cd652203 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -266,6 +266,7 @@ core-$(CONFIG_KVM_ARM_HOST) += arch/arm/kvm/
# If we have a machine-specific directory, then include it in the build.
core-y += arch/arm/kernel/ arch/arm/mm/ arch/arm/common/
+core-y += arch/arm/probes/
core-y += arch/arm/net/
core-y += arch/arm/crypto/
core-y += arch/arm/firmware/
diff --git a/arch/arm/boot/dts/armada-370-db.dts b/arch/arm/boot/dts/armada-370-db.dts
index 1466580be295..70b1943a86b1 100644
--- a/arch/arm/boot/dts/armada-370-db.dts
+++ b/arch/arm/boot/dts/armada-370-db.dts
@@ -203,27 +203,3 @@
compatible = "linux,spdif-dir";
};
};
-
-&pinctrl {
- /*
- * These pins might be muxed as I2S by
- * the bootloader, but it conflicts
- * with the real I2S pins that are
- * muxed using i2s_pins. We must mux
- * those pins to a function other than
- * I2S.
- */
- pinctrl-0 = <&hog_pins1 &hog_pins2>;
- pinctrl-names = "default";
-
- hog_pins1: hog-pins1 {
- marvell,pins = "mpp6", "mpp8", "mpp10",
- "mpp12", "mpp13";
- marvell,function = "gpio";
- };
-
- hog_pins2: hog-pins2 {
- marvell,pins = "mpp5", "mpp7", "mpp9";
- marvell,function = "gpo";
- };
-};
diff --git a/arch/arm/configs/multi_v7_defconfig b/arch/arm/configs/multi_v7_defconfig
index 2328fe752e9c..bc393b7e5ece 100644
--- a/arch/arm/configs/multi_v7_defconfig
+++ b/arch/arm/configs/multi_v7_defconfig
@@ -338,6 +338,7 @@ CONFIG_USB=y
CONFIG_USB_XHCI_HCD=y
CONFIG_USB_XHCI_MVEBU=y
CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_EHCI_EXYNOS=y
CONFIG_USB_EHCI_TEGRA=y
CONFIG_USB_EHCI_HCD_STI=y
CONFIG_USB_EHCI_HCD_PLATFORM=y
diff --git a/arch/arm/kernel/insn.h b/arch/arm/include/asm/insn.h
index e96065da4dae..e96065da4dae 100644
--- a/arch/arm/kernel/insn.h
+++ b/arch/arm/include/asm/insn.h
diff --git a/arch/arm/include/asm/kprobes.h b/arch/arm/include/asm/kprobes.h
index 49fa0dfaad33..3ea9be559726 100644
--- a/arch/arm/include/asm/kprobes.h
+++ b/arch/arm/include/asm/kprobes.h
@@ -22,7 +22,6 @@
#define __ARCH_WANT_KPROBES_INSN_SLOT
#define MAX_INSN_SIZE 2
-#define MAX_STACK_SIZE 64 /* 32 would probably be OK */
#define flush_insn_slot(p) do { } while (0)
#define kretprobe_blacklist_size 0
@@ -51,5 +50,37 @@ int kprobe_fault_handler(struct pt_regs *regs, unsigned int fsr);
int kprobe_exceptions_notify(struct notifier_block *self,
unsigned long val, void *data);
+/* optinsn template addresses */
+extern __visible kprobe_opcode_t optprobe_template_entry;
+extern __visible kprobe_opcode_t optprobe_template_val;
+extern __visible kprobe_opcode_t optprobe_template_call;
+extern __visible kprobe_opcode_t optprobe_template_end;
+extern __visible kprobe_opcode_t optprobe_template_sub_sp;
+extern __visible kprobe_opcode_t optprobe_template_add_sp;
+extern __visible kprobe_opcode_t optprobe_template_restore_begin;
+extern __visible kprobe_opcode_t optprobe_template_restore_orig_insn;
+extern __visible kprobe_opcode_t optprobe_template_restore_end;
+
+#define MAX_OPTIMIZED_LENGTH 4
+#define MAX_OPTINSN_SIZE \
+ ((unsigned long)&optprobe_template_end - \
+ (unsigned long)&optprobe_template_entry)
+#define RELATIVEJUMP_SIZE 4
+
+struct arch_optimized_insn {
+ /*
+ * copy of the original instructions.
+ * Different from x86, ARM kprobe_opcode_t is u32.
+ */
+#define MAX_COPIED_INSN DIV_ROUND_UP(RELATIVEJUMP_SIZE, sizeof(kprobe_opcode_t))
+ kprobe_opcode_t copied_insn[MAX_COPIED_INSN];
+ /* detour code buffer */
+ kprobe_opcode_t *insn;
+ /*
+ * We always copy one instruction on ARM,
+ * so size will always be 4, and unlike x86, there is no
+ * need for a size field.
+ */
+};
#endif /* _ARM_KPROBES_H */
diff --git a/arch/arm/kernel/patch.h b/arch/arm/include/asm/patch.h
index 77e054c2f6cd..77e054c2f6cd 100644
--- a/arch/arm/kernel/patch.h
+++ b/arch/arm/include/asm/patch.h
diff --git a/arch/arm/include/asm/probes.h b/arch/arm/include/asm/probes.h
index 806cfe622a9e..1e5b9bb92270 100644
--- a/arch/arm/include/asm/probes.h
+++ b/arch/arm/include/asm/probes.h
@@ -19,6 +19,8 @@
#ifndef _ASM_PROBES_H
#define _ASM_PROBES_H
+#ifndef __ASSEMBLY__
+
typedef u32 probes_opcode_t;
struct arch_probes_insn;
@@ -38,6 +40,19 @@ struct arch_probes_insn {
probes_check_cc *insn_check_cc;
probes_insn_singlestep_t *insn_singlestep;
probes_insn_fn_t *insn_fn;
+ int stack_space;
+ unsigned long register_usage_flags;
+ bool kprobe_direct_exec;
};
+#endif /* __ASSEMBLY__ */
+
+/*
+ * We assume one instruction can consume at most 64 bytes stack, which is
+ * 'push {r0-r15}'. Instructions consume more or unknown stack space like
+ * 'str r0, [sp, #-80]' and 'str r0, [sp, r1]' should be prohibit to probe.
+ * Both kprobe and jprobe use this macro.
+ */
+#define MAX_STACK_SIZE 64
+
#endif
diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index fb2b71ebe3f2..902397dd1000 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -51,20 +51,8 @@ obj-$(CONFIG_DYNAMIC_FTRACE) += ftrace.o insn.o
obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += ftrace.o insn.o
obj-$(CONFIG_JUMP_LABEL) += jump_label.o insn.o patch.o
obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o
-obj-$(CONFIG_UPROBES) += probes.o probes-arm.o uprobes.o uprobes-arm.o
-obj-$(CONFIG_KPROBES) += probes.o kprobes.o kprobes-common.o patch.o
-ifdef CONFIG_THUMB2_KERNEL
-obj-$(CONFIG_KPROBES) += kprobes-thumb.o probes-thumb.o
-else
-obj-$(CONFIG_KPROBES) += kprobes-arm.o probes-arm.o
-endif
-obj-$(CONFIG_ARM_KPROBES_TEST) += test-kprobes.o
-test-kprobes-objs := kprobes-test.o
-ifdef CONFIG_THUMB2_KERNEL
-test-kprobes-objs += kprobes-test-thumb.o
-else
-test-kprobes-objs += kprobes-test-arm.o
-endif
+# Main staffs in KPROBES are in arch/arm/probes/ .
+obj-$(CONFIG_KPROBES) += patch.o insn.o
obj-$(CONFIG_OABI_COMPAT) += sys_oabi-compat.o
obj-$(CONFIG_ARM_THUMBEE) += thumbee.o
obj-$(CONFIG_KGDB) += kgdb.o patch.o
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index 2f5555d307b3..672b21942fff 100644
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S
@@ -31,6 +31,7 @@
#include "entry-header.S"
#include <asm/entry-macro-multi.S>
+#include <asm/probes.h>
/*
* Interrupt handling.
@@ -249,7 +250,7 @@ __und_svc:
@ If a kprobe is about to simulate a "stmdb sp..." instruction,
@ it obviously needs free stack space which then will belong to
@ the saved context.
- svc_entry 64
+ svc_entry MAX_STACK_SIZE
#else
svc_entry
#endif
diff --git a/arch/arm/kernel/ftrace.c b/arch/arm/kernel/ftrace.c
index b8c75e45a950..709ee1d6d4df 100644
--- a/arch/arm/kernel/ftrace.c
+++ b/arch/arm/kernel/ftrace.c
@@ -20,8 +20,7 @@
#include <asm/cacheflush.h>
#include <asm/opcodes.h>
#include <asm/ftrace.h>
-
-#include "insn.h"
+#include <asm/insn.h>
#ifdef CONFIG_THUMB2_KERNEL
#define NOP 0xf85deb04 /* pop.w {lr} */
diff --git a/arch/arm/kernel/jump_label.c b/arch/arm/kernel/jump_label.c
index afeeb9ea6f43..e39cbf488cfe 100644
--- a/arch/arm/kernel/jump_label.c
+++ b/arch/arm/kernel/jump_label.c
@@ -1,8 +1,7 @@
#include <linux/kernel.h>
#include <linux/jump_label.h>
-
-#include "insn.h"
-#include "patch.h"
+#include <asm/patch.h>
+#include <asm/insn.h>
#ifdef HAVE_JUMP_LABEL
diff --git a/arch/arm/kernel/kgdb.c b/arch/arm/kernel/kgdb.c
index 07db2f8a1b45..a6ad93c9bce3 100644
--- a/arch/arm/kernel/kgdb.c
+++ b/arch/arm/kernel/kgdb.c
@@ -14,10 +14,9 @@
#include <linux/kgdb.h>
#include <linux/uaccess.h>
+#include <asm/patch.h>
#include <asm/traps.h>
-#include "patch.h"
-
struct dbg_reg_def_t dbg_reg_def[DBG_MAX_REG_NUM] =
{
{ "r0", 4, offsetof(struct pt_regs, ARM_r0)},
diff --git a/arch/arm/kernel/patch.c b/arch/arm/kernel/patch.c
index 5038960e3c55..69bda1a5707e 100644
--- a/arch/arm/kernel/patch.c
+++ b/arch/arm/kernel/patch.c
@@ -8,8 +8,7 @@
#include <asm/fixmap.h>
#include <asm/smp_plat.h>
#include <asm/opcodes.h>
-
-#include "patch.h"
+#include <asm/patch.h>
struct patch {
void *addr;
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index d13f185e7bd5..e55408e96559 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -1049,6 +1049,15 @@ static int c_show(struct seq_file *m, void *v)
seq_printf(m, "model name\t: %s rev %d (%s)\n",
cpu_name, cpuid & 15, elf_platform);
+#if defined(CONFIG_SMP)
+ seq_printf(m, "BogoMIPS\t: %lu.%02lu\n",
+ per_cpu(cpu_data, i).loops_per_jiffy / (500000UL/HZ),
+ (per_cpu(cpu_data, i).loops_per_jiffy / (5000UL/HZ)) % 100);
+#else
+ seq_printf(m, "BogoMIPS\t: %lu.%02lu\n",
+ loops_per_jiffy / (500000/HZ),
+ (loops_per_jiffy / (5000/HZ)) % 100);
+#endif
/* dump out the processor features */
seq_puts(m, "Features\t: ");
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 5e6052e18850..86ef244c5a24 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -387,6 +387,18 @@ asmlinkage void secondary_start_kernel(void)
void __init smp_cpus_done(unsigned int max_cpus)
{
+ int cpu;
+ unsigned long bogosum = 0;
+
+ for_each_online_cpu(cpu)
+ bogosum += per_cpu(cpu_data, cpu).loops_per_jiffy;
+
+ printk(KERN_INFO "SMP: Total of %d processors activated "
+ "(%lu.%02lu BogoMIPS).\n",
+ num_online_cpus(),
+ bogosum / (500000/HZ),
+ (bogosum / (5000/HZ)) % 100);
+
hyp_mode_check();
}
diff --git a/arch/arm/probes/Makefile b/arch/arm/probes/Makefile
new file mode 100644
index 000000000000..aa1f8590dcdd
--- /dev/null
+++ b/arch/arm/probes/Makefile
@@ -0,0 +1,7 @@
+obj-$(CONFIG_UPROBES) += decode.o decode-arm.o uprobes/
+obj-$(CONFIG_KPROBES) += decode.o kprobes/
+ifdef CONFIG_THUMB2_KERNEL
+obj-$(CONFIG_KPROBES) += decode-thumb.o
+else
+obj-$(CONFIG_KPROBES) += decode-arm.o
+endif
diff --git a/arch/arm/kernel/probes-arm.c b/arch/arm/probes/decode-arm.c
index 8eaef81d8344..f72c33a2dcfb 100644
--- a/arch/arm/kernel/probes-arm.c
+++ b/arch/arm/probes/decode-arm.c
@@ -1,5 +1,6 @@
/*
- * arch/arm/kernel/probes-arm.c
+ *
+ * arch/arm/probes/decode-arm.c
*
* Some code moved here from arch/arm/kernel/kprobes-arm.c
*
@@ -20,8 +21,8 @@
#include <linux/stddef.h>
#include <linux/ptrace.h>
-#include "probes.h"
-#include "probes-arm.h"
+#include "decode.h"
+#include "decode-arm.h"
#define sign_extend(x, signbit) ((x) | (0 - ((x) & (1 << (signbit)))))
@@ -369,17 +370,17 @@ static const union decode_item arm_cccc_001x_table[] = {
/* MOVW cccc 0011 0000 xxxx xxxx xxxx xxxx xxxx */
/* MOVT cccc 0011 0100 xxxx xxxx xxxx xxxx xxxx */
- DECODE_EMULATEX (0x0fb00000, 0x03000000, PROBES_DATA_PROCESSING_IMM,
+ DECODE_EMULATEX (0x0fb00000, 0x03000000, PROBES_MOV_HALFWORD,
REGS(0, NOPC, 0, 0, 0)),
/* YIELD cccc 0011 0010 0000 xxxx xxxx 0000 0001 */
DECODE_OR (0x0fff00ff, 0x03200001),
/* SEV cccc 0011 0010 0000 xxxx xxxx 0000 0100 */
- DECODE_EMULATE (0x0fff00ff, 0x03200004, PROBES_EMULATE_NONE),
+ DECODE_EMULATE (0x0fff00ff, 0x03200004, PROBES_SEV),
/* NOP cccc 0011 0010 0000 xxxx xxxx 0000 0000 */
/* WFE cccc 0011 0010 0000 xxxx xxxx 0000 0010 */
/* WFI cccc 0011 0010 0000 xxxx xxxx 0000 0011 */
- DECODE_SIMULATE (0x0fff00fc, 0x03200000, PROBES_SIMULATE_NOP),
+ DECODE_SIMULATE (0x0fff00fc, 0x03200000, PROBES_WFE),
/* DBG cccc 0011 0010 0000 xxxx xxxx ffff xxxx */
/* unallocated hints cccc 0011 0010 0000 xxxx xxxx xxxx xxxx */
/* MSR (immediate) cccc 0011 0x10 xxxx xxxx xxxx xxxx xxxx */
@@ -725,10 +726,11 @@ static void __kprobes arm_singlestep(probes_opcode_t insn,
*/
enum probes_insn __kprobes
arm_probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi,
- bool emulate, const union decode_action *actions)
+ bool emulate, const union decode_action *actions,
+ const struct decode_checker *checkers[])
{
asi->insn_singlestep = arm_singlestep;
asi->insn_check_cc = probes_condition_checks[insn>>28];
return probes_decode_insn(insn, asi, probes_decode_arm_table, false,
- emulate, actions);
+ emulate, actions, checkers);
}
diff --git a/arch/arm/kernel/probes-arm.h b/arch/arm/probes/decode-arm.h
index ace6572f6e26..b3b80f6d414b 100644
--- a/arch/arm/kernel/probes-arm.h
+++ b/arch/arm/probes/decode-arm.h
@@ -1,5 +1,5 @@
/*
- * arch/arm/kernel/probes-arm.h
+ * arch/arm/probes/decode-arm.h
*
* Copyright 2013 Linaro Ltd.
* Written by: David A. Long
@@ -15,9 +15,9 @@
#ifndef _ARM_KERNEL_PROBES_ARM_H
#define _ARM_KERNEL_PROBES_ARM_H
+#include "decode.h"
+
enum probes_arm_action {
- PROBES_EMULATE_NONE,
- PROBES_SIMULATE_NOP,
PROBES_PRELOAD_IMM,
PROBES_PRELOAD_REG,
PROBES_BRANCH_IMM,
@@ -68,6 +68,7 @@ extern const union decode_item probes_decode_arm_table[];
enum probes_insn arm_probes_decode_insn(probes_opcode_t,
struct arch_probes_insn *, bool emulate,
- const union decode_action *actions);
+ const union decode_action *actions,
+ const struct decode_checker *checkers[]);
#endif
diff --git a/arch/arm/kernel/probes-thumb.c b/arch/arm/probes/decode-thumb.c
index 4131351e812f..985e7dd4cac6 100644
--- a/arch/arm/kernel/probes-thumb.c
+++ b/arch/arm/probes/decode-thumb.c
@@ -1,5 +1,5 @@
/*
- * arch/arm/kernel/probes-thumb.c
+ * arch/arm/probes/decode-thumb.c
*
* Copyright (C) 2011 Jon Medhurst <tixy@yxit.co.uk>.
*
@@ -12,8 +12,8 @@
#include <linux/kernel.h>
#include <linux/module.h>
-#include "probes.h"
-#include "probes-thumb.h"
+#include "decode.h"
+#include "decode-thumb.h"
static const union decode_item t32_table_1110_100x_x0xx[] = {
@@ -863,20 +863,22 @@ static void __kprobes thumb32_singlestep(probes_opcode_t opcode,
enum probes_insn __kprobes
thumb16_probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi,
- bool emulate, const union decode_action *actions)
+ bool emulate, const union decode_action *actions,
+ const struct decode_checker *checkers[])
{
asi->insn_singlestep = thumb16_singlestep;
asi->insn_check_cc = thumb_check_cc;
return probes_decode_insn(insn, asi, probes_decode_thumb16_table, true,
- emulate, actions);
+ emulate, actions, checkers);
}
enum probes_insn __kprobes
thumb32_probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi,
- bool emulate, const union decode_action *actions)
+ bool emulate, const union decode_action *actions,
+ const struct decode_checker *checkers[])
{
asi->insn_singlestep = thumb32_singlestep;
asi->insn_check_cc = thumb_check_cc;
return probes_decode_insn(insn, asi, probes_decode_thumb32_table, true,
- emulate, actions);
+ emulate, actions, checkers);
}
diff --git a/arch/arm/kernel/probes-thumb.h b/arch/arm/probes/decode-thumb.h
index 7c6f6ebe514f..8457add0a2d8 100644
--- a/arch/arm/kernel/probes-thumb.h
+++ b/arch/arm/probes/decode-thumb.h
@@ -1,5 +1,5 @@
/*
- * arch/arm/kernel/probes-thumb.h
+ * arch/arm/probes/decode-thumb.h
*
* Copyright 2013 Linaro Ltd.
* Written by: David A. Long
@@ -15,6 +15,8 @@
#ifndef _ARM_KERNEL_PROBES_THUMB_H
#define _ARM_KERNEL_PROBES_THUMB_H
+#include "decode.h"
+
/*
* True if current instruction is in an IT block.
*/
@@ -89,9 +91,11 @@ extern const union decode_item probes_decode_thumb16_table[];
enum probes_insn __kprobes
thumb16_probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi,
- bool emulate, const union decode_action *actions);
+ bool emulate, const union decode_action *actions,
+ const struct decode_checker *checkers[]);
enum probes_insn __kprobes
thumb32_probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi,
- bool emulate, const union decode_action *actions);
+ bool emulate, const union decode_action *actions,
+ const struct decode_checker *checkers[]);
#endif
diff --git a/arch/arm/kernel/probes.c b/arch/arm/probes/decode.c
index a8ab540d7e73..880ebe0cdf19 100644
--- a/arch/arm/kernel/probes.c
+++ b/arch/arm/probes/decode.c
@@ -1,5 +1,5 @@
/*
- * arch/arm/kernel/probes.c
+ * arch/arm/probes/decode.c
*
* Copyright (C) 2011 Jon Medhurst <tixy@yxit.co.uk>.
*
@@ -17,7 +17,7 @@
#include <asm/ptrace.h>
#include <linux/bug.h>
-#include "probes.h"
+#include "decode.h"
#ifndef find_str_pc_offset
@@ -342,6 +342,31 @@ static const int decode_struct_sizes[NUM_DECODE_TYPES] = {
[DECODE_TYPE_REJECT] = sizeof(struct decode_reject)
};
+static int run_checkers(const struct decode_checker *checkers[],
+ int action, probes_opcode_t insn,
+ struct arch_probes_insn *asi,
+ const struct decode_header *h)
+{
+ const struct decode_checker **p;
+
+ if (!checkers)
+ return INSN_GOOD;
+
+ p = checkers;
+ while (*p != NULL) {
+ int retval;
+ probes_check_t *checker_func = (*p)[action].checker;
+
+ retval = INSN_GOOD;
+ if (checker_func)
+ retval = checker_func(insn, asi, h);
+ if (retval == INSN_REJECTED)
+ return retval;
+ p++;
+ }
+ return INSN_GOOD;
+}
+
/*
* probes_decode_insn operates on data tables in order to decode an ARM
* architecture instruction onto which a kprobe has been placed.
@@ -388,11 +413,34 @@ static const int decode_struct_sizes[NUM_DECODE_TYPES] = {
int __kprobes
probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi,
const union decode_item *table, bool thumb,
- bool emulate, const union decode_action *actions)
+ bool emulate, const union decode_action *actions,
+ const struct decode_checker *checkers[])
{
const struct decode_header *h = (struct decode_header *)table;
const struct decode_header *next;
bool matched = false;
+ /*
+ * @insn can be modified by decode_regs. Save its original
+ * value for checkers.
+ */
+ probes_opcode_t origin_insn = insn;
+
+ /*
+ * stack_space is initialized to 0 here. Checker functions
+ * should update is value if they find this is a stack store
+ * instruction: positive value means bytes of stack usage,
+ * negitive value means unable to determine stack usage
+ * statically. For instruction doesn't store to stack, checker
+ * do nothing with it.
+ */
+ asi->stack_space = 0;
+
+ /*
+ * Similarly to stack_space, register_usage_flags is filled by
+ * checkers. Its default value is set to ~0, which is 'all
+ * registers are used', to prevent any potential optimization.
+ */
+ asi->register_usage_flags = ~0UL;
if (emulate)
insn = prepare_emulated_insn(insn, asi, thumb);
@@ -422,24 +470,41 @@ probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi,
}
case DECODE_TYPE_CUSTOM: {
+ int err;
struct decode_custom *d = (struct decode_custom *)h;
- return actions[d->decoder.action].decoder(insn, asi, h);
+ int action = d->decoder.action;
+
+ err = run_checkers(checkers, action, origin_insn, asi, h);
+ if (err == INSN_REJECTED)
+ return INSN_REJECTED;
+ return actions[action].decoder(insn, asi, h);
}
case DECODE_TYPE_SIMULATE: {
+ int err;
struct decode_simulate *d = (struct decode_simulate *)h;
- asi->insn_handler = actions[d->handler.action].handler;
+ int action = d->handler.action;
+
+ err = run_checkers(checkers, action, origin_insn, asi, h);
+ if (err == INSN_REJECTED)
+ return INSN_REJECTED;
+ asi->insn_handler = actions[action].handler;
return INSN_GOOD_NO_SLOT;
}
case DECODE_TYPE_EMULATE: {
+ int err;
struct decode_emulate *d = (struct decode_emulate *)h;
+ int action = d->handler.action;
+
+ err = run_checkers(checkers, action, origin_insn, asi, h);
+ if (err == INSN_REJECTED)
+ return INSN_REJECTED;
if (!emulate)
- return actions[d->handler.action].decoder(insn,
- asi, h);
+ return actions[action].decoder(insn, asi, h);
- asi->insn_handler = actions[d->handler.action].handler;
+ asi->insn_handler = actions[action].handler;
set_emulated_insn(insn, asi, thumb);
return INSN_GOOD;
}
diff --git a/arch/arm/kernel/probes.h b/arch/arm/probes/decode.h
index dba9f2466a93..f9b08ba7fe73 100644
--- a/arch/arm/kernel/probes.h
+++ b/arch/arm/probes/decode.h
@@ -1,5 +1,5 @@
/*
- * arch/arm/kernel/probes.h
+ * arch/arm/probes/decode.h
*
* Copyright (C) 2011 Jon Medhurst <tixy@yxit.co.uk>.
*
@@ -314,6 +314,14 @@ union decode_action {
probes_custom_decode_t *decoder;
};
+typedef enum probes_insn (probes_check_t)(probes_opcode_t,
+ struct arch_probes_insn *,
+ const struct decode_header *);
+
+struct decode_checker {
+ probes_check_t *checker;
+};
+
#define DECODE_END \
{.bits = DECODE_TYPE_END}
@@ -402,6 +410,7 @@ probes_insn_handler_t probes_emulate_none;
int __kprobes
probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi,
const union decode_item *table, bool thumb, bool emulate,
- const union decode_action *actions);
+ const union decode_action *actions,
+ const struct decode_checker **checkers);
#endif
diff --git a/arch/arm/probes/kprobes/Makefile b/arch/arm/probes/kprobes/Makefile
new file mode 100644
index 000000000000..76a36bf102b7
--- /dev/null
+++ b/arch/arm/probes/kprobes/Makefile
@@ -0,0 +1,12 @@
+obj-$(CONFIG_KPROBES) += core.o actions-common.o checkers-common.o
+obj-$(CONFIG_ARM_KPROBES_TEST) += test-kprobes.o
+test-kprobes-objs := test-core.o
+
+ifdef CONFIG_THUMB2_KERNEL
+obj-$(CONFIG_KPROBES) += actions-thumb.o checkers-thumb.o
+test-kprobes-objs += test-thumb.o
+else
+obj-$(CONFIG_KPROBES) += actions-arm.o checkers-arm.o
+obj-$(CONFIG_OPTPROBES) += opt-arm.o
+test-kprobes-objs += test-arm.o
+endif
diff --git a/arch/arm/kernel/kprobes-arm.c b/arch/arm/probes/kprobes/actions-arm.c
index ac300c60d656..b9056d649607 100644
--- a/arch/arm/kernel/kprobes-arm.c
+++ b/arch/arm/probes/kprobes/actions-arm.c
@@ -1,5 +1,5 @@
/*
- * arch/arm/kernel/kprobes-decode.c
+ * arch/arm/probes/kprobes/actions-arm.c
*
* Copyright (C) 2006, 2007 Motorola Inc.
*
@@ -62,8 +62,9 @@
#include <linux/kprobes.h>
#include <linux/ptrace.h>
-#include "kprobes.h"
-#include "probes-arm.h"
+#include "../decode-arm.h"
+#include "core.h"
+#include "checkers.h"
#if __LINUX_ARM_ARCH__ >= 6
#define BLX(reg) "blx "reg" \n\t"
@@ -302,8 +303,6 @@ emulate_rdlo12rdhi16rn0rm8_rwflags_nopc(probes_opcode_t insn,
}
const union decode_action kprobes_arm_actions[NUM_PROBES_ARM_ACTIONS] = {
- [PROBES_EMULATE_NONE] = {.handler = probes_emulate_none},
- [PROBES_SIMULATE_NOP] = {.handler = probes_simulate_nop},
[PROBES_PRELOAD_IMM] = {.handler = probes_simulate_nop},
[PROBES_PRELOAD_REG] = {.handler = probes_simulate_nop},
[PROBES_BRANCH_IMM] = {.handler = simulate_blx1},
@@ -341,3 +340,5 @@ const union decode_action kprobes_arm_actions[NUM_PROBES_ARM_ACTIONS] = {
[PROBES_BRANCH] = {.handler = simulate_bbl},
[PROBES_LDMSTM] = {.decoder = kprobe_decode_ldmstm}
};
+
+const struct decode_checker *kprobes_arm_checkers[] = {arm_stack_checker, arm_regs_checker, NULL};
diff --git a/arch/arm/kernel/kprobes-common.c b/arch/arm/probes/kprobes/actions-common.c
index 0bf5d64eba1d..bd20a71cd34a 100644
--- a/arch/arm/kernel/kprobes-common.c
+++ b/arch/arm/probes/kprobes/actions-common.c
@@ -1,5 +1,5 @@
/*
- * arch/arm/kernel/kprobes-common.c
+ * arch/arm/probes/kprobes/actions-common.c
*
* Copyright (C) 2011 Jon Medhurst <tixy@yxit.co.uk>.
*
@@ -15,7 +15,7 @@
#include <linux/kprobes.h>
#include <asm/opcodes.h>
-#include "kprobes.h"
+#include "core.h"
static void __kprobes simulate_ldm1stm1(probes_opcode_t insn,
diff --git a/arch/arm/kernel/kprobes-thumb.c b/arch/arm/probes/kprobes/actions-thumb.c
index 9495d7f3516f..07cfd9bef340 100644
--- a/arch/arm/kernel/kprobes-thumb.c
+++ b/arch/arm/probes/kprobes/actions-thumb.c
@@ -1,5 +1,5 @@
/*
- * arch/arm/kernel/kprobes-thumb.c
+ * arch/arm/probes/kprobes/actions-thumb.c
*
* Copyright (C) 2011 Jon Medhurst <tixy@yxit.co.uk>.
*
@@ -13,8 +13,9 @@
#include <linux/ptrace.h>
#include <linux/kprobes.h>
-#include "kprobes.h"
-#include "probes-thumb.h"
+#include "../decode-thumb.h"
+#include "core.h"
+#include "checkers.h"
/* These emulation encodings are functionally equivalent... */
#define t32_emulate_rd8rn16rm0ra12_noflags \
@@ -664,3 +665,6 @@ const union decode_action kprobes_t32_actions[NUM_PROBES_T32_ACTIONS] = {
[PROBES_T32_MUL_ADD_LONG] = {
.handler = t32_emulate_rdlo12rdhi8rn16rm0_noflags},
};
+
+const struct decode_checker *kprobes_t32_checkers[] = {t32_stack_checker, NULL};
+const struct decode_checker *kprobes_t16_checkers[] = {t16_stack_checker, NULL};
diff --git a/arch/arm/probes/kprobes/checkers-arm.c b/arch/arm/probes/kprobes/checkers-arm.c
new file mode 100644
index 000000000000..7b9817333b68
--- /dev/null
+++ b/arch/arm/probes/kprobes/checkers-arm.c
@@ -0,0 +1,192 @@
+/*
+ * arch/arm/probes/kprobes/checkers-arm.c
+ *
+ * Copyright (C) 2014 Huawei Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include "../decode.h"
+#include "../decode-arm.h"
+#include "checkers.h"
+
+static enum probes_insn __kprobes arm_check_stack(probes_opcode_t insn,
+ struct arch_probes_insn *asi,
+ const struct decode_header *h)
+{
+ /*
+ * PROBES_LDRSTRD, PROBES_LDMSTM, PROBES_STORE,
+ * PROBES_STORE_EXTRA may get here. Simply mark all normal
+ * insns as STACK_USE_NONE.
+ */
+ static const union decode_item table[] = {
+ /*
+ * 'STR{,D,B,H}, Rt, [Rn, Rm]' should be marked as UNKNOWN
+ * if Rn or Rm is SP.
+ * x
+ * STR (register) cccc 011x x0x0 xxxx xxxx xxxx xxxx xxxx
+ * STRB (register) cccc 011x x1x0 xxxx xxxx xxxx xxxx xxxx
+ */
+ DECODE_OR (0x0e10000f, 0x0600000d),
+ DECODE_OR (0x0e1f0000, 0x060d0000),
+
+ /*
+ * x
+ * STRD (register) cccc 000x x0x0 xxxx xxxx xxxx 1111 xxxx
+ * STRH (register) cccc 000x x0x0 xxxx xxxx xxxx 1011 xxxx
+ */
+ DECODE_OR (0x0e5000bf, 0x000000bd),
+ DECODE_CUSTOM (0x0e5f00b0, 0x000d00b0, STACK_USE_UNKNOWN),
+
+ /*
+ * For PROBES_LDMSTM, only stmdx sp, [...] need to examine
+ *
+ * Bit B/A (bit 24) encodes arithmetic operation order. 1 means
+ * before, 0 means after.
+ * Bit I/D (bit 23) encodes arithmetic operation. 1 means
+ * increment, 0 means decrement.
+ *
+ * So:
+ * B I
+ * / /
+ * A D | Rn |
+ * STMDX SP, [...] cccc 100x 00x0 xxxx xxxx xxxx xxxx xxxx
+ */
+ DECODE_CUSTOM (0x0edf0000, 0x080d0000, STACK_USE_STMDX),
+
+ /* P U W | Rn | Rt | imm12 |*/
+ /* STR (immediate) cccc 010x x0x0 1101 xxxx xxxx xxxx xxxx */
+ /* STRB (immediate) cccc 010x x1x0 1101 xxxx xxxx xxxx xxxx */
+ /* P U W | Rn | Rt |imm4| |imm4|*/
+ /* STRD (immediate) cccc 000x x1x0 1101 xxxx xxxx 1111 xxxx */
+ /* STRH (immediate) cccc 000x x1x0 1101 xxxx xxxx 1011 xxxx */
+ /*
+ * index = (P == '1'); add = (U == '1').
+ * Above insns with:
+ * index == 0 (str{,d,h} rx, [sp], #+/-imm) or
+ * add == 1 (str{,d,h} rx, [sp, #+<imm>])
+ * should be STACK_USE_NONE.
+ * Only str{,b,d,h} rx,[sp,#-n] (P == 1 and U == 0) are
+ * required to be examined.
+ */
+ /* STR{,B} Rt,[SP,#-n] cccc 0101 0xx0 1101 xxxx xxxx xxxx xxxx */
+ DECODE_CUSTOM (0x0f9f0000, 0x050d0000, STACK_USE_FIXED_XXX),
+
+ /* STR{D,H} Rt,[SP,#-n] cccc 0001 01x0 1101 xxxx xxxx 1x11 xxxx */
+ DECODE_CUSTOM (0x0fdf00b0, 0x014d00b0, STACK_USE_FIXED_X0X),
+
+ /* fall through */
+ DECODE_CUSTOM (0, 0, STACK_USE_NONE),
+ DECODE_END
+ };
+
+ return probes_decode_insn(insn, asi, table, false, false, stack_check_actions, NULL);
+}
+
+const struct decode_checker arm_stack_checker[NUM_PROBES_ARM_ACTIONS] = {
+ [PROBES_LDRSTRD] = {.checker = arm_check_stack},
+ [PROBES_STORE_EXTRA] = {.checker = arm_check_stack},
+ [PROBES_STORE] = {.checker = arm_check_stack},
+ [PROBES_LDMSTM] = {.checker = arm_check_stack},
+};
+
+static enum probes_insn __kprobes arm_check_regs_nouse(probes_opcode_t insn,
+ struct arch_probes_insn *asi,
+ const struct decode_header *h)
+{
+ asi->register_usage_flags = 0;
+ return INSN_GOOD;
+}
+
+static enum probes_insn arm_check_regs_normal(probes_opcode_t insn,
+ struct arch_probes_insn *asi,
+ const struct decode_header *h)
+{
+ u32 regs = h->type_regs.bits >> DECODE_TYPE_BITS;
+ int i;
+
+ asi->register_usage_flags = 0;
+ for (i = 0; i < 5; regs >>= 4, insn >>= 4, i++)
+ if (regs & 0xf)
+ asi->register_usage_flags |= 1 << (insn & 0xf);
+
+ return INSN_GOOD;
+}
+
+
+static enum probes_insn arm_check_regs_ldmstm(probes_opcode_t insn,
+ struct arch_probes_insn *asi,
+ const struct decode_header *h)
+{
+ unsigned int reglist = insn & 0xffff;
+ unsigned int rn = (insn >> 16) & 0xf;
+ asi->register_usage_flags = reglist | (1 << rn);
+ return INSN_GOOD;
+}
+
+static enum probes_insn arm_check_regs_mov_ip_sp(probes_opcode_t insn,
+ struct arch_probes_insn *asi,
+ const struct decode_header *h)
+{
+ /* Instruction is 'mov ip, sp' i.e. 'mov r12, r13' */
+ asi->register_usage_flags = (1 << 12) | (1<< 13);
+ return INSN_GOOD;
+}
+
+/*
+ * | Rn |Rt/d| | Rm |
+ * LDRD (register) cccc 000x x0x0 xxxx xxxx xxxx 1101 xxxx
+ * STRD (register) cccc 000x x0x0 xxxx xxxx xxxx 1111 xxxx
+ * | Rn |Rt/d| |imm4L|
+ * LDRD (immediate) cccc 000x x1x0 xxxx xxxx xxxx 1101 xxxx
+ * STRD (immediate) cccc 000x x1x0 xxxx xxxx xxxx 1111 xxxx
+ *
+ * Such instructions access Rt/d and its next register, so different
+ * from others, a specific checker is required to handle this extra
+ * implicit register usage.
+ */
+static enum probes_insn arm_check_regs_ldrdstrd(probes_opcode_t insn,
+ struct arch_probes_insn *asi,
+ const struct decode_header *h)
+{
+ int rdt = (insn >> 12) & 0xf;
+ arm_check_regs_normal(insn, asi, h);
+ asi->register_usage_flags |= 1 << (rdt + 1);
+ return INSN_GOOD;
+}
+
+
+const struct decode_checker arm_regs_checker[NUM_PROBES_ARM_ACTIONS] = {
+ [PROBES_MRS] = {.checker = arm_check_regs_normal},
+ [PROBES_SATURATING_ARITHMETIC] = {.checker = arm_check_regs_normal},
+ [PROBES_MUL1] = {.checker = arm_check_regs_normal},
+ [PROBES_MUL2] = {.checker = arm_check_regs_normal},
+ [PROBES_MUL_ADD_LONG] = {.checker = arm_check_regs_normal},
+ [PROBES_MUL_ADD] = {.checker = arm_check_regs_normal},
+ [PROBES_LOAD] = {.checker = arm_check_regs_normal},
+ [PROBES_LOAD_EXTRA] = {.checker = arm_check_regs_normal},
+ [PROBES_STORE] = {.checker = arm_check_regs_normal},
+ [PROBES_STORE_EXTRA] = {.checker = arm_check_regs_normal},
+ [PROBES_DATA_PROCESSING_REG] = {.checker = arm_check_regs_normal},
+ [PROBES_DATA_PROCESSING_IMM] = {.checker = arm_check_regs_normal},
+ [PROBES_SEV] = {.checker = arm_check_regs_nouse},
+ [PROBES_WFE] = {.checker = arm_check_regs_nouse},
+ [PROBES_SATURATE] = {.checker = arm_check_regs_normal},
+ [PROBES_REV] = {.checker = arm_check_regs_normal},
+ [PROBES_MMI] = {.checker = arm_check_regs_normal},
+ [PROBES_PACK] = {.checker = arm_check_regs_normal},
+ [PROBES_EXTEND] = {.checker = arm_check_regs_normal},
+ [PROBES_EXTEND_ADD] = {.checker = arm_check_regs_normal},
+ [PROBES_BITFIELD] = {.checker = arm_check_regs_normal},
+ [PROBES_LDMSTM] = {.checker = arm_check_regs_ldmstm},
+ [PROBES_MOV_IP_SP] = {.checker = arm_check_regs_mov_ip_sp},
+ [PROBES_LDRSTRD] = {.checker = arm_check_regs_ldrdstrd},
+};
diff --git a/arch/arm/probes/kprobes/checkers-common.c b/arch/arm/probes/kprobes/checkers-common.c
new file mode 100644
index 000000000000..971119c29474
--- /dev/null
+++ b/arch/arm/probes/kprobes/checkers-common.c
@@ -0,0 +1,101 @@
+/*
+ * arch/arm/probes/kprobes/checkers-common.c
+ *
+ * Copyright (C) 2014 Huawei Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include "../decode.h"
+#include "../decode-arm.h"
+#include "checkers.h"
+
+enum probes_insn checker_stack_use_none(probes_opcode_t insn,
+ struct arch_probes_insn *asi,
+ const struct decode_header *h)
+{
+ asi->stack_space = 0;
+ return INSN_GOOD_NO_SLOT;
+}
+
+enum probes_insn checker_stack_use_unknown(probes_opcode_t insn,
+ struct arch_probes_insn *asi,
+ const struct decode_header *h)
+{
+ asi->stack_space = -1;
+ return INSN_GOOD_NO_SLOT;
+}
+
+#ifdef CONFIG_THUMB2_KERNEL
+enum probes_insn checker_stack_use_imm_0xx(probes_opcode_t insn,
+ struct arch_probes_insn *asi,
+ const struct decode_header *h)
+{
+ int imm = insn & 0xff;
+ asi->stack_space = imm;
+ return INSN_GOOD_NO_SLOT;
+}
+
+/*
+ * Different from other insn uses imm8, the real addressing offset of
+ * STRD in T32 encoding should be imm8 * 4. See ARMARM description.
+ */
+enum probes_insn checker_stack_use_t32strd(probes_opcode_t insn,
+ struct arch_probes_insn *asi,
+ const struct decode_header *h)
+{
+ int imm = insn & 0xff;
+ asi->stack_space = imm << 2;
+ return INSN_GOOD_NO_SLOT;
+}
+#else
+enum probes_insn checker_stack_use_imm_x0x(probes_opcode_t insn,
+ struct arch_probes_insn *asi,
+ const struct decode_header *h)
+{
+ int imm = ((insn & 0xf00) >> 4) + (insn & 0xf);
+ asi->stack_space = imm;
+ return INSN_GOOD_NO_SLOT;
+}
+#endif
+
+enum probes_insn checker_stack_use_imm_xxx(probes_opcode_t insn,
+ struct arch_probes_insn *asi,
+ const struct decode_header *h)
+{
+ int imm = insn & 0xfff;
+ asi->stack_space = imm;
+ return INSN_GOOD_NO_SLOT;
+}
+
+enum probes_insn checker_stack_use_stmdx(probes_opcode_t insn,
+ struct arch_probes_insn *asi,
+ const struct decode_header *h)
+{
+ unsigned int reglist = insn & 0xffff;
+ int pbit = insn & (1 << 24);
+ asi->stack_space = (hweight32(reglist) - (!pbit ? 1 : 0)) * 4;
+
+ return INSN_GOOD_NO_SLOT;
+}
+
+const union decode_action stack_check_actions[] = {
+ [STACK_USE_NONE] = {.decoder = checker_stack_use_none},
+ [STACK_USE_UNKNOWN] = {.decoder = checker_stack_use_unknown},
+#ifdef CONFIG_THUMB2_KERNEL
+ [STACK_USE_FIXED_0XX] = {.decoder = checker_stack_use_imm_0xx},
+ [STACK_USE_T32STRD] = {.decoder = checker_stack_use_t32strd},
+#else
+ [STACK_USE_FIXED_X0X] = {.decoder = checker_stack_use_imm_x0x},
+#endif
+ [STACK_USE_FIXED_XXX] = {.decoder = checker_stack_use_imm_xxx},
+ [STACK_USE_STMDX] = {.decoder = checker_stack_use_stmdx},
+};
diff --git a/arch/arm/probes/kprobes/checkers-thumb.c b/arch/arm/probes/kprobes/checkers-thumb.c
new file mode 100644
index 000000000000..d608e3b9017a
--- /dev/null
+++ b/arch/arm/probes/kprobes/checkers-thumb.c
@@ -0,0 +1,110 @@
+/*
+ * arch/arm/probes/kprobes/checkers-thumb.c
+ *
+ * Copyright (C) 2014 Huawei Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include "../decode.h"
+#include "../decode-thumb.h"
+#include "checkers.h"
+
+static enum probes_insn __kprobes t32_check_stack(probes_opcode_t insn,
+ struct arch_probes_insn *asi,
+ const struct decode_header *h)
+{
+ /*
+ * PROBES_T32_LDMSTM, PROBES_T32_LDRDSTRD and PROBES_T32_LDRSTR
+ * may get here. Simply mark all normal insns as STACK_USE_NONE.
+ */
+ static const union decode_item table[] = {
+
+ /*
+ * First, filter out all ldr insns to make our life easier.
+ * Following load insns may come here:
+ * LDM, LDRD, LDR.
+ * In T32 encoding, bit 20 is enough for distinguishing
+ * load and store. All load insns have this bit set, when
+ * all store insns have this bit clear.
+ */
+ DECODE_CUSTOM (0x00100000, 0x00100000, STACK_USE_NONE),
+
+ /*
+ * Mark all 'STR{,B,H}, Rt, [Rn, Rm]' as STACK_USE_UNKNOWN
+ * if Rn or Rm is SP. T32 doesn't encode STRD.
+ */
+ /* xx | Rn | Rt | | Rm |*/
+ /* STR (register) 1111 1000 0100 xxxx xxxx 0000 00xx xxxx */
+ /* STRB (register) 1111 1000 0000 xxxx xxxx 0000 00xx xxxx */
+ /* STRH (register) 1111 1000 0010 xxxx xxxx 0000 00xx xxxx */
+ /* INVALID INSN 1111 1000 0110 xxxx xxxx 0000 00xx xxxx */
+ /* By Introducing INVALID INSN, bit 21 and 22 can be ignored. */
+ DECODE_OR (0xff9f0fc0, 0xf80d0000),
+ DECODE_CUSTOM (0xff900fcf, 0xf800000d, STACK_USE_UNKNOWN),
+
+
+ /* xx | Rn | Rt | PUW| imm8 |*/
+ /* STR (imm 8) 1111 1000 0100 1101 xxxx 110x xxxx xxxx */
+ /* STRB (imm 8) 1111 1000 0000 1101 xxxx 110x xxxx xxxx */
+ /* STRH (imm 8) 1111 1000 0010 1101 xxxx 110x xxxx xxxx */
+ /* INVALID INSN 1111 1000 0110 1101 xxxx 110x xxxx xxxx */
+ /* Only consider U == 0 and P == 1: strx rx, [sp, #-<imm>] */
+ DECODE_CUSTOM (0xff9f0e00, 0xf80d0c00, STACK_USE_FIXED_0XX),
+
+ /* For STR{,B,H} (imm 12), offset is always positive, so ignore them. */
+
+ /* P U W | Rn | Rt | Rt2| imm8 |*/
+ /* STRD (immediate) 1110 1001 01x0 1101 xxxx xxxx xxxx xxxx */
+ /*
+ * Only consider U == 0 and P == 1.
+ * Also note that STRD in T32 encoding is special:
+ * imm = ZeroExtend(imm8:'00', 32)
+ */
+ DECODE_CUSTOM (0xffdf0000, 0xe94d0000, STACK_USE_T32STRD),
+
+ /* | Rn | */
+ /* STMDB 1110 1001 00x0 1101 xxxx xxxx xxxx xxxx */
+ DECODE_CUSTOM (0xffdf0000, 0xe90d0000, STACK_USE_STMDX),
+
+ /* fall through */
+ DECODE_CUSTOM (0, 0, STACK_USE_NONE),
+ DECODE_END
+ };
+
+ return probes_decode_insn(insn, asi, table, false, false, stack_check_actions, NULL);
+}
+
+const struct decode_checker t32_stack_checker[NUM_PROBES_T32_ACTIONS] = {
+ [PROBES_T32_LDMSTM] = {.checker = t32_check_stack},
+ [PROBES_T32_LDRDSTRD] = {.checker = t32_check_stack},
+ [PROBES_T32_LDRSTR] = {.checker = t32_check_stack},
+};
+
+/*
+ * See following comments. This insn must be 'push'.
+ */
+static enum probes_insn __kprobes t16_check_stack(probes_opcode_t insn,
+ struct arch_probes_insn *asi,
+ const struct decode_header *h)
+{
+ unsigned int reglist = insn & 0x1ff;
+ asi->stack_space = hweight32(reglist) * 4;
+ return INSN_GOOD;
+}
+
+/*
+ * T16 encoding is simple: only the 'push' insn can need extra stack space.
+ * Other insns, like str, can only use r0-r7 as Rn.
+ */
+const struct decode_checker t16_stack_checker[NUM_PROBES_T16_ACTIONS] = {
+ [PROBES_T16_PUSH] = {.checker = t16_check_stack},
+};
diff --git a/arch/arm/probes/kprobes/checkers.h b/arch/arm/probes/kprobes/checkers.h
new file mode 100644
index 000000000000..cf6c9e74d666
--- /dev/null
+++ b/arch/arm/probes/kprobes/checkers.h
@@ -0,0 +1,55 @@
+/*
+ * arch/arm/probes/kprobes/checkers.h
+ *
+ * Copyright (C) 2014 Huawei Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ */
+#ifndef _ARM_KERNEL_PROBES_CHECKERS_H
+#define _ARM_KERNEL_PROBES_CHECKERS_H
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include "../decode.h"
+
+extern probes_check_t checker_stack_use_none;
+extern probes_check_t checker_stack_use_unknown;
+#ifdef CONFIG_THUMB2_KERNEL
+extern probes_check_t checker_stack_use_imm_0xx;
+#else
+extern probes_check_t checker_stack_use_imm_x0x;
+#endif
+extern probes_check_t checker_stack_use_imm_xxx;
+extern probes_check_t checker_stack_use_stmdx;
+
+enum {
+ STACK_USE_NONE,
+ STACK_USE_UNKNOWN,
+#ifdef CONFIG_THUMB2_KERNEL
+ STACK_USE_FIXED_0XX,
+ STACK_USE_T32STRD,
+#else
+ STACK_USE_FIXED_X0X,
+#endif
+ STACK_USE_FIXED_XXX,
+ STACK_USE_STMDX,
+ NUM_STACK_USE_TYPES
+};
+
+extern const union decode_action stack_check_actions[];
+
+#ifndef CONFIG_THUMB2_KERNEL
+extern const struct decode_checker arm_stack_checker[];
+extern const struct decode_checker arm_regs_checker[];
+#else
+#endif
+extern const struct decode_checker t32_stack_checker[];
+extern const struct decode_checker t16_stack_checker[];
+#endif
diff --git a/arch/arm/kernel/kprobes.c b/arch/arm/probes/kprobes/core.c
index 6d644202c8dc..a4ec240ee7ba 100644
--- a/arch/arm/kernel/kprobes.c
+++ b/arch/arm/probes/kprobes/core.c
@@ -30,11 +30,11 @@
#include <asm/cacheflush.h>
#include <linux/percpu.h>
#include <linux/bug.h>
+#include <asm/patch.h>
-#include "kprobes.h"
-#include "probes-arm.h"
-#include "probes-thumb.h"
-#include "patch.h"
+#include "../decode-arm.h"
+#include "../decode-thumb.h"
+#include "core.h"
#define MIN_STACK_SIZE(addr) \
min((unsigned long)MAX_STACK_SIZE, \
@@ -61,6 +61,7 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p)
kprobe_decode_insn_t *decode_insn;
const union decode_action *actions;
int is;
+ const struct decode_checker **checkers;
if (in_exception_text(addr))
return -EINVAL;
@@ -74,9 +75,11 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p)
insn = __opcode_thumb32_compose(insn, inst2);
decode_insn = thumb32_probes_decode_insn;
actions = kprobes_t32_actions;
+ checkers = kprobes_t32_checkers;
} else {
decode_insn = thumb16_probes_decode_insn;
actions = kprobes_t16_actions;
+ checkers = kprobes_t16_checkers;
}
#else /* !CONFIG_THUMB2_KERNEL */
thumb = false;
@@ -85,12 +88,13 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p)
insn = __mem_to_opcode_arm(*p->addr);
decode_insn = arm_probes_decode_insn;
actions = kprobes_arm_actions;
+ checkers = kprobes_arm_checkers;
#endif
p->opcode = insn;
p->ainsn.insn = tmp_insn;
- switch ((*decode_insn)(insn, &p->ainsn, true, actions)) {
+ switch ((*decode_insn)(insn, &p->ainsn, true, actions, checkers)) {
case INSN_REJECTED: /* not supported */
return -EINVAL;
@@ -111,6 +115,15 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p)
break;
}
+ /*
+ * Never instrument insn like 'str r0, [sp, +/-r1]'. Also, insn likes
+ * 'str r0, [sp, #-68]' should also be prohibited.
+ * See __und_svc.
+ */
+ if ((p->ainsn.stack_space < 0) ||
+ (p->ainsn.stack_space > MAX_STACK_SIZE))
+ return -EINVAL;
+
return 0;
}
@@ -150,19 +163,31 @@ void __kprobes arch_arm_kprobe(struct kprobe *p)
* memory. It is also needed to atomically set the two half-words of a 32-bit
* Thumb breakpoint.
*/
-int __kprobes __arch_disarm_kprobe(void *p)
-{
- struct kprobe *kp = p;
- void *addr = (void *)((uintptr_t)kp->addr & ~1);
-
- __patch_text(addr, kp->opcode);
+struct patch {
+ void *addr;
+ unsigned int insn;
+};
+static int __kprobes_remove_breakpoint(void *data)
+{
+ struct patch *p = data;
+ __patch_text(p->addr, p->insn);
return 0;
}
+void __kprobes kprobes_remove_breakpoint(void *addr, unsigned int insn)
+{
+ struct patch p = {
+ .addr = addr,
+ .insn = insn,
+ };
+ stop_machine(__kprobes_remove_breakpoint, &p, cpu_online_mask);
+}
+
void __kprobes arch_disarm_kprobe(struct kprobe *p)
{
- stop_machine(__arch_disarm_kprobe, p, cpu_online_mask);
+ kprobes_remove_breakpoint((void *)((uintptr_t)p->addr & ~1),
+ p->opcode);
}
void __kprobes arch_remove_kprobe(struct kprobe *p)
diff --git a/arch/arm/kernel/kprobes.h b/arch/arm/probes/kprobes/core.h
index 9a2712ecefc3..ec5d1f20a085 100644
--- a/arch/arm/kernel/kprobes.h
+++ b/arch/arm/probes/kprobes/core.h
@@ -19,7 +19,8 @@
#ifndef _ARM_KERNEL_KPROBES_H
#define _ARM_KERNEL_KPROBES_H
-#include "probes.h"
+#include <asm/kprobes.h>
+#include "../decode.h"
/*
* These undefined instructions must be unique and
@@ -29,6 +30,8 @@
#define KPROBE_THUMB16_BREAKPOINT_INSTRUCTION 0xde18
#define KPROBE_THUMB32_BREAKPOINT_INSTRUCTION 0xf7f0a018
+extern void kprobes_remove_breakpoint(void *addr, unsigned int insn);
+
enum probes_insn __kprobes
kprobe_decode_ldmstm(kprobe_opcode_t insn, struct arch_probes_insn *asi,
const struct decode_header *h);
@@ -36,16 +39,19 @@ kprobe_decode_ldmstm(kprobe_opcode_t insn, struct arch_probes_insn *asi,
typedef enum probes_insn (kprobe_decode_insn_t)(probes_opcode_t,
struct arch_probes_insn *,
bool,
- const union decode_action *);
+ const union decode_action *,
+ const struct decode_checker *[]);
#ifdef CONFIG_THUMB2_KERNEL
extern const union decode_action kprobes_t32_actions[];
extern const union decode_action kprobes_t16_actions[];
-
+extern const struct decode_checker *kprobes_t32_checkers[];
+extern const struct decode_checker *kprobes_t16_checkers[];
#else /* !CONFIG_THUMB2_KERNEL */
extern const union decode_action kprobes_arm_actions[];
+extern const struct decode_checker *kprobes_arm_checkers[];
#endif
diff --git a/arch/arm/probes/kprobes/opt-arm.c b/arch/arm/probes/kprobes/opt-arm.c
new file mode 100644
index 000000000000..bcdecc25461b
--- /dev/null
+++ b/arch/arm/probes/kprobes/opt-arm.c
@@ -0,0 +1,370 @@
+/*
+ * Kernel Probes Jump Optimization (Optprobes)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Copyright (C) IBM Corporation, 2002, 2004
+ * Copyright (C) Hitachi Ltd., 2012
+ * Copyright (C) Huawei Inc., 2014
+ */
+
+#include <linux/kprobes.h>
+#include <linux/jump_label.h>
+#include <asm/kprobes.h>
+#include <asm/cacheflush.h>
+/* for arm_gen_branch */
+#include <asm/insn.h>
+/* for patch_text */
+#include <asm/patch.h>
+
+#include "core.h"
+
+/*
+ * See register_usage_flags. If the probed instruction doesn't use PC,
+ * we can copy it into template and have it executed directly without
+ * simulation or emulation.
+ */
+#define ARM_REG_PC 15
+#define can_kprobe_direct_exec(m) (!test_bit(ARM_REG_PC, &(m)))
+
+/*
+ * NOTE: the first sub and add instruction will be modified according
+ * to the stack cost of the instruction.
+ */
+asm (
+ ".global optprobe_template_entry\n"
+ "optprobe_template_entry:\n"
+ ".global optprobe_template_sub_sp\n"
+ "optprobe_template_sub_sp:"
+ " sub sp, sp, #0xff\n"
+ " stmia sp, {r0 - r14} \n"
+ ".global optprobe_template_add_sp\n"
+ "optprobe_template_add_sp:"
+ " add r3, sp, #0xff\n"
+ " str r3, [sp, #52]\n"
+ " mrs r4, cpsr\n"
+ " str r4, [sp, #64]\n"
+ " mov r1, sp\n"
+ " ldr r0, 1f\n"
+ " ldr r2, 2f\n"
+ /*
+ * AEABI requires an 8-bytes alignment stack. If
+ * SP % 8 != 0 (SP % 4 == 0 should be ensured),
+ * alloc more bytes here.
+ */
+ " and r4, sp, #4\n"
+ " sub sp, sp, r4\n"
+#if __LINUX_ARM_ARCH__ >= 5
+ " blx r2\n"
+#else
+ " mov lr, pc\n"
+ " mov pc, r2\n"
+#endif
+ " add sp, sp, r4\n"
+ " ldr r1, [sp, #64]\n"
+ " tst r1, #"__stringify(PSR_T_BIT)"\n"
+ " ldrne r2, [sp, #60]\n"
+ " orrne r2, #1\n"
+ " strne r2, [sp, #60] @ set bit0 of PC for thumb\n"
+ " msr cpsr_cxsf, r1\n"
+ ".global optprobe_template_restore_begin\n"
+ "optprobe_template_restore_begin:\n"
+ " ldmia sp, {r0 - r15}\n"
+ ".global optprobe_template_restore_orig_insn\n"
+ "optprobe_template_restore_orig_insn:\n"
+ " nop\n"
+ ".global optprobe_template_restore_end\n"
+ "optprobe_template_restore_end:\n"
+ " nop\n"
+ ".global optprobe_template_val\n"
+ "optprobe_template_val:\n"
+ "1: .long 0\n"
+ ".global optprobe_template_call\n"
+ "optprobe_template_call:\n"
+ "2: .long 0\n"
+ ".global optprobe_template_end\n"
+ "optprobe_template_end:\n");
+
+#define TMPL_VAL_IDX \
+ ((unsigned long *)&optprobe_template_val - (unsigned long *)&optprobe_template_entry)
+#define TMPL_CALL_IDX \
+ ((unsigned long *)&optprobe_template_call - (unsigned long *)&optprobe_template_entry)
+#define TMPL_END_IDX \
+ ((unsigned long *)&optprobe_template_end - (unsigned long *)&optprobe_template_entry)
+#define TMPL_ADD_SP \
+ ((unsigned long *)&optprobe_template_add_sp - (unsigned long *)&optprobe_template_entry)
+#define TMPL_SUB_SP \
+ ((unsigned long *)&optprobe_template_sub_sp - (unsigned long *)&optprobe_template_entry)
+#define TMPL_RESTORE_BEGIN \
+ ((unsigned long *)&optprobe_template_restore_begin - (unsigned long *)&optprobe_template_entry)
+#define TMPL_RESTORE_ORIGN_INSN \
+ ((unsigned long *)&optprobe_template_restore_orig_insn - (unsigned long *)&optprobe_template_entry)
+#define TMPL_RESTORE_END \
+ ((unsigned long *)&optprobe_template_restore_end - (unsigned long *)&optprobe_template_entry)
+
+/*
+ * ARM can always optimize an instruction when using ARM ISA, except
+ * instructions like 'str r0, [sp, r1]' which store to stack and unable
+ * to determine stack space consumption statically.
+ */
+int arch_prepared_optinsn(struct arch_optimized_insn *optinsn)
+{
+ return optinsn->insn != NULL;
+}
+
+/*
+ * In ARM ISA, kprobe opt always replace one instruction (4 bytes
+ * aligned and 4 bytes long). It is impossible to encounter another
+ * kprobe in the address range. So always return 0.
+ */
+int arch_check_optimized_kprobe(struct optimized_kprobe *op)
+{
+ return 0;
+}
+
+/* Caller must ensure addr & 3 == 0 */
+static int can_optimize(struct kprobe *kp)
+{
+ if (kp->ainsn.stack_space < 0)
+ return 0;
+ /*
+ * 255 is the biggest imm can be used in 'sub r0, r0, #<imm>'.
+ * Number larger than 255 needs special encoding.
+ */
+ if (kp->ainsn.stack_space > 255 - sizeof(struct pt_regs))
+ return 0;
+ return 1;
+}
+
+/* Free optimized instruction slot */
+static void
+__arch_remove_optimized_kprobe(struct optimized_kprobe *op, int dirty)
+{
+ if (op->optinsn.insn) {
+ free_optinsn_slot(op->optinsn.insn, dirty);
+ op->optinsn.insn = NULL;
+ }
+}
+
+extern void kprobe_handler(struct pt_regs *regs);
+
+static void
+optimized_callback(struct optimized_kprobe *op, struct pt_regs *regs)
+{
+ unsigned long flags;
+ struct kprobe *p = &op->kp;
+ struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
+
+ /* Save skipped registers */
+ regs->ARM_pc = (unsigned long)op->kp.addr;
+ regs->ARM_ORIG_r0 = ~0UL;
+
+ local_irq_save(flags);
+
+ if (kprobe_running()) {
+ kprobes_inc_nmissed_count(&op->kp);
+ } else {
+ __this_cpu_write(current_kprobe, &op->kp);
+ kcb->kprobe_status = KPROBE_HIT_ACTIVE;
+ opt_pre_handler(&op->kp, regs);
+ __this_cpu_write(current_kprobe, NULL);
+ }
+
+ /*
+ * We singlestep the replaced instruction only when it can't be
+ * executed directly during restore.
+ */
+ if (!p->ainsn.kprobe_direct_exec)
+ op->kp.ainsn.insn_singlestep(p->opcode, &p->ainsn, regs);
+
+ local_irq_restore(flags);
+}
+
+int arch_prepare_optimized_kprobe(struct optimized_kprobe *op, struct kprobe *orig)
+{
+ kprobe_opcode_t *code;
+ unsigned long rel_chk;
+ unsigned long val;
+ unsigned long stack_protect = sizeof(struct pt_regs);
+
+ if (!can_optimize(orig))
+ return -EILSEQ;
+
+ code = get_optinsn_slot();
+ if (!code)
+ return -ENOMEM;
+
+ /*
+ * Verify if the address gap is in 32MiB range, because this uses
+ * a relative jump.
+ *
+ * kprobe opt use a 'b' instruction to branch to optinsn.insn.
+ * According to ARM manual, branch instruction is:
+ *
+ * 31 28 27 24 23 0
+ * +------+---+---+---+---+----------------+
+ * | cond | 1 | 0 | 1 | 0 | imm24 |
+ * +------+---+---+---+---+----------------+
+ *
+ * imm24 is a signed 24 bits integer. The real branch offset is computed
+ * by: imm32 = SignExtend(imm24:'00', 32);
+ *
+ * So the maximum forward branch should be:
+ * (0x007fffff << 2) = 0x01fffffc = 0x1fffffc
+ * The maximum backword branch should be:
+ * (0xff800000 << 2) = 0xfe000000 = -0x2000000
+ *
+ * We can simply check (rel & 0xfe000003):
+ * if rel is positive, (rel & 0xfe000000) shoule be 0
+ * if rel is negitive, (rel & 0xfe000000) should be 0xfe000000
+ * the last '3' is used for alignment checking.
+ */
+ rel_chk = (unsigned long)((long)code -
+ (long)orig->addr + 8) & 0xfe000003;
+
+ if ((rel_chk != 0) && (rel_chk != 0xfe000000)) {
+ /*
+ * Different from x86, we free code buf directly instead of
+ * calling __arch_remove_optimized_kprobe() because
+ * we have not fill any field in op.
+ */
+ free_optinsn_slot(code, 0);
+ return -ERANGE;
+ }
+
+ /* Copy arch-dep-instance from template. */
+ memcpy(code, &optprobe_template_entry,
+ TMPL_END_IDX * sizeof(kprobe_opcode_t));
+
+ /* Adjust buffer according to instruction. */
+ BUG_ON(orig->ainsn.stack_space < 0);
+
+ stack_protect += orig->ainsn.stack_space;
+
+ /* Should have been filtered by can_optimize(). */
+ BUG_ON(stack_protect > 255);
+
+ /* Create a 'sub sp, sp, #<stack_protect>' */
+ code[TMPL_SUB_SP] = __opcode_to_mem_arm(0xe24dd000 | stack_protect);
+ /* Create a 'add r3, sp, #<stack_protect>' */
+ code[TMPL_ADD_SP] = __opcode_to_mem_arm(0xe28d3000 | stack_protect);
+
+ /* Set probe information */
+ val = (unsigned long)op;
+ code[TMPL_VAL_IDX] = val;
+
+ /* Set probe function call */
+ val = (unsigned long)optimized_callback;
+ code[TMPL_CALL_IDX] = val;
+
+ /* If possible, copy insn and have it executed during restore */
+ orig->ainsn.kprobe_direct_exec = false;
+ if (can_kprobe_direct_exec(orig->ainsn.register_usage_flags)) {
+ kprobe_opcode_t final_branch = arm_gen_branch(
+ (unsigned long)(&code[TMPL_RESTORE_END]),
+ (unsigned long)(op->kp.addr) + 4);
+ if (final_branch != 0) {
+ /*
+ * Replace original 'ldmia sp, {r0 - r15}' with
+ * 'ldmia {r0 - r14}', restore all registers except pc.
+ */
+ code[TMPL_RESTORE_BEGIN] = __opcode_to_mem_arm(0xe89d7fff);
+
+ /* The original probed instruction */
+ code[TMPL_RESTORE_ORIGN_INSN] = __opcode_to_mem_arm(orig->opcode);
+
+ /* Jump back to next instruction */
+ code[TMPL_RESTORE_END] = __opcode_to_mem_arm(final_branch);
+ orig->ainsn.kprobe_direct_exec = true;
+ }
+ }
+
+ flush_icache_range((unsigned long)code,
+ (unsigned long)(&code[TMPL_END_IDX]));
+
+ /* Set op->optinsn.insn means prepared. */
+ op->optinsn.insn = code;
+ return 0;
+}
+
+void __kprobes arch_optimize_kprobes(struct list_head *oplist)
+{
+ struct optimized_kprobe *op, *tmp;
+
+ list_for_each_entry_safe(op, tmp, oplist, list) {
+ unsigned long insn;
+ WARN_ON(kprobe_disabled(&op->kp));
+
+ /*
+ * Backup instructions which will be replaced
+ * by jump address
+ */
+ memcpy(op->optinsn.copied_insn, op->kp.addr,
+ RELATIVEJUMP_SIZE);
+
+ insn = arm_gen_branch((unsigned long)op->kp.addr,
+ (unsigned long)op->optinsn.insn);
+ BUG_ON(insn == 0);
+
+ /*
+ * Make it a conditional branch if replaced insn
+ * is consitional
+ */
+ insn = (__mem_to_opcode_arm(
+ op->optinsn.copied_insn[0]) & 0xf0000000) |
+ (insn & 0x0fffffff);
+
+ /*
+ * Similar to __arch_disarm_kprobe, operations which
+ * removing breakpoints must be wrapped by stop_machine
+ * to avoid racing.
+ */
+ kprobes_remove_breakpoint(op->kp.addr, insn);
+
+ list_del_init(&op->list);
+ }
+}
+
+void arch_unoptimize_kprobe(struct optimized_kprobe *op)
+{
+ arch_arm_kprobe(&op->kp);
+}
+
+/*
+ * Recover original instructions and breakpoints from relative jumps.
+ * Caller must call with locking kprobe_mutex.
+ */
+void arch_unoptimize_kprobes(struct list_head *oplist,
+ struct list_head *done_list)
+{
+ struct optimized_kprobe *op, *tmp;
+
+ list_for_each_entry_safe(op, tmp, oplist, list) {
+ arch_unoptimize_kprobe(op);
+ list_move(&op->list, done_list);
+ }
+}
+
+int arch_within_optimized_kprobe(struct optimized_kprobe *op,
+ unsigned long addr)
+{
+ return ((unsigned long)op->kp.addr <= addr &&
+ (unsigned long)op->kp.addr + RELATIVEJUMP_SIZE > addr);
+}
+
+void arch_remove_optimized_kprobe(struct optimized_kprobe *op)
+{
+ __arch_remove_optimized_kprobe(op, 1);
+}
diff --git a/arch/arm/kernel/kprobes-test-arm.c b/arch/arm/probes/kprobes/test-arm.c
index cb1424240ff6..8866aedfdea2 100644
--- a/arch/arm/kernel/kprobes-test-arm.c
+++ b/arch/arm/probes/kprobes/test-arm.c
@@ -12,8 +12,9 @@
#include <linux/module.h>
#include <asm/system_info.h>
#include <asm/opcodes.h>
+#include <asm/probes.h>
-#include "kprobes-test.h"
+#include "test-core.h"
#define TEST_ISA "32"
@@ -203,9 +204,9 @@ void kprobe_arm_test_cases(void)
#endif
TEST_GROUP("Miscellaneous instructions")
- TEST("mrs r0, cpsr")
- TEST("mrspl r7, cpsr")
- TEST("mrs r14, cpsr")
+ TEST_RMASKED("mrs r",0,~PSR_IGNORE_BITS,", cpsr")
+ TEST_RMASKED("mrspl r",7,~PSR_IGNORE_BITS,", cpsr")
+ TEST_RMASKED("mrs r",14,~PSR_IGNORE_BITS,", cpsr")
TEST_UNSUPPORTED(__inst_arm(0xe10ff000) " @ mrs r15, cpsr")
TEST_UNSUPPORTED("mrs r0, spsr")
TEST_UNSUPPORTED("mrs lr, spsr")
@@ -214,9 +215,12 @@ void kprobe_arm_test_cases(void)
TEST_UNSUPPORTED("msr cpsr_f, lr")
TEST_UNSUPPORTED("msr spsr, r0")
+#if __LINUX_ARM_ARCH__ >= 5 || \
+ (__LINUX_ARM_ARCH__ == 4 && !defined(CONFIG_CPU_32v4))
TEST_BF_R("bx r",0,2f,"")
TEST_BB_R("bx r",7,2f,"")
TEST_BF_R("bxeq r",14,2f,"")
+#endif
#if __LINUX_ARM_ARCH__ >= 5
TEST_R("clz r0, r",0, 0x0,"")
@@ -476,7 +480,9 @@ void kprobe_arm_test_cases(void)
TEST_GROUP("Extra load/store instructions")
TEST_RPR( "strh r",0, VAL1,", [r",1, 48,", -r",2, 24,"]")
- TEST_RPR( "streqh r",14,VAL2,", [r",13,0, ", r",12, 48,"]")
+ TEST_RPR( "streqh r",14,VAL2,", [r",11,0, ", r",12, 48,"]")
+ TEST_UNSUPPORTED( "streqh r14, [r13, r12]")
+ TEST_UNSUPPORTED( "streqh r14, [r12, r13]")
TEST_RPR( "strh r",1, VAL1,", [r",2, 24,", r",3, 48,"]!")
TEST_RPR( "strneh r",12,VAL2,", [r",11,48,", -r",10,24,"]!")
TEST_RPR( "strh r",2, VAL1,", [r",3, 24,"], r",4, 48,"")
@@ -501,6 +507,9 @@ void kprobe_arm_test_cases(void)
TEST_RP( "strplh r",12,VAL2,", [r",11,24,", #-4]!")
TEST_RP( "strh r",2, VAL1,", [r",3, 24,"], #48")
TEST_RP( "strh r",10,VAL2,", [r",9, 64,"], #-48")
+ TEST_RP( "strh r",3, VAL1,", [r",13,TEST_MEMORY_SIZE,", #-"__stringify(MAX_STACK_SIZE)"]!")
+ TEST_UNSUPPORTED("strh r3, [r13, #-"__stringify(MAX_STACK_SIZE)"-8]!")
+ TEST_RP( "strh r",4, VAL1,", [r",14,TEST_MEMORY_SIZE,", #-"__stringify(MAX_STACK_SIZE)"-8]!")
TEST_UNSUPPORTED(__inst_arm(0xe1efc3b0) " @ strh r12, [pc, #48]!")
TEST_UNSUPPORTED(__inst_arm(0xe0c9f3b0) " @ strh pc, [r9], #48")
@@ -565,7 +574,9 @@ void kprobe_arm_test_cases(void)
#if __LINUX_ARM_ARCH__ >= 5
TEST_RPR( "strd r",0, VAL1,", [r",1, 48,", -r",2,24,"]")
- TEST_RPR( "strccd r",8, VAL2,", [r",13,0, ", r",12,48,"]")
+ TEST_RPR( "strccd r",8, VAL2,", [r",11,0, ", r",12,48,"]")
+ TEST_UNSUPPORTED( "strccd r8, [r13, r12]")
+ TEST_UNSUPPORTED( "strccd r8, [r12, r13]")
TEST_RPR( "strd r",4, VAL1,", [r",2, 24,", r",3, 48,"]!")
TEST_RPR( "strcsd r",12,VAL2,", [r",11,48,", -r",10,24,"]!")
TEST_RPR( "strd r",2, VAL1,", [r",5, 24,"], r",4,48,"")
@@ -589,6 +600,9 @@ void kprobe_arm_test_cases(void)
TEST_RP( "strvcd r",12,VAL2,", [r",11,24,", #-16]!")
TEST_RP( "strd r",2, VAL1,", [r",4, 24,"], #48")
TEST_RP( "strd r",10,VAL2,", [r",9, 64,"], #-48")
+ TEST_RP( "strd r",6, VAL1,", [r",13,TEST_MEMORY_SIZE,", #-"__stringify(MAX_STACK_SIZE)"]!")
+ TEST_UNSUPPORTED("strd r6, [r13, #-"__stringify(MAX_STACK_SIZE)"-8]!")
+ TEST_RP( "strd r",4, VAL1,", [r",12,TEST_MEMORY_SIZE,", #-"__stringify(MAX_STACK_SIZE)"-8]!")
TEST_UNSUPPORTED(__inst_arm(0xe1efc3f0) " @ strd r12, [pc, #48]!")
TEST_P( "ldrd r0, [r",0, 24,", #-8]")
@@ -637,14 +651,20 @@ void kprobe_arm_test_cases(void)
TEST_RP( "str"byte" r",12,VAL2,", [r",11,24,", #-4]!") \
TEST_RP( "str"byte" r",2, VAL1,", [r",3, 24,"], #48") \
TEST_RP( "str"byte" r",10,VAL2,", [r",9, 64,"], #-48") \
+ TEST_RP( "str"byte" r",3, VAL1,", [r",13,TEST_MEMORY_SIZE,", #-"__stringify(MAX_STACK_SIZE)"]!") \
+ TEST_UNSUPPORTED("str"byte" r3, [r13, #-"__stringify(MAX_STACK_SIZE)"-8]!") \
+ TEST_RP( "str"byte" r",4, VAL1,", [r",10,TEST_MEMORY_SIZE,", #-"__stringify(MAX_STACK_SIZE)"-8]!") \
TEST_RPR("str"byte" r",0, VAL1,", [r",1, 48,", -r",2, 24,"]") \
- TEST_RPR("str"byte" r",14,VAL2,", [r",13,0, ", r",12, 48,"]") \
+ TEST_RPR("str"byte" r",14,VAL2,", [r",11,0, ", r",12, 48,"]") \
+ TEST_UNSUPPORTED("str"byte" r14, [r13, r12]") \
+ TEST_UNSUPPORTED("str"byte" r14, [r12, r13]") \
TEST_RPR("str"byte" r",1, VAL1,", [r",2, 24,", r",3, 48,"]!") \
TEST_RPR("str"byte" r",12,VAL2,", [r",11,48,", -r",10,24,"]!") \
TEST_RPR("str"byte" r",2, VAL1,", [r",3, 24,"], r",4, 48,"") \
TEST_RPR("str"byte" r",10,VAL2,", [r",9, 48,"], -r",11,24,"") \
TEST_RPR("str"byte" r",0, VAL1,", [r",1, 24,", r",2, 32,", asl #1]")\
- TEST_RPR("str"byte" r",14,VAL2,", [r",13,0, ", r",12, 32,", lsr #2]")\
+ TEST_RPR("str"byte" r",14,VAL2,", [r",11,0, ", r",12, 32,", lsr #2]")\
+ TEST_UNSUPPORTED("str"byte" r14, [r13, r12, lsr #2]") \
TEST_RPR("str"byte" r",1, VAL1,", [r",2, 24,", r",3, 32,", asr #3]!")\
TEST_RPR("str"byte" r",12,VAL2,", [r",11,24,", r",10, 4,", ror #31]!")\
TEST_P( "ldr"byte" r0, [r",0, 24,", #-2]") \
@@ -668,12 +688,12 @@ void kprobe_arm_test_cases(void)
LOAD_STORE("")
TEST_P( "str pc, [r",0,0,", #15*4]")
- TEST_R( "str pc, [sp, r",2,15*4,"]")
+ TEST_UNSUPPORTED( "str pc, [sp, r2]")
TEST_BF( "ldr pc, [sp, #15*4]")
TEST_BF_R("ldr pc, [sp, r",2,15*4,"]")
TEST_P( "str sp, [r",0,0,", #13*4]")
- TEST_R( "str sp, [sp, r",2,13*4,"]")
+ TEST_UNSUPPORTED( "str sp, [sp, r2]")
TEST_BF( "ldr sp, [sp, #13*4]")
TEST_BF_R("ldr sp, [sp, r",2,13*4,"]")
diff --git a/arch/arm/kernel/kprobes-test.c b/arch/arm/probes/kprobes/test-core.c
index b206d7790c77..9775de22e2ff 100644
--- a/arch/arm/kernel/kprobes-test.c
+++ b/arch/arm/probes/kprobes/test-core.c
@@ -209,10 +209,10 @@
#include <linux/bug.h>
#include <asm/opcodes.h>
-#include "kprobes.h"
-#include "probes-arm.h"
-#include "probes-thumb.h"
-#include "kprobes-test.h"
+#include "core.h"
+#include "test-core.h"
+#include "../decode-arm.h"
+#include "../decode-thumb.h"
#define BENCHMARKING 1
@@ -236,6 +236,8 @@ static int tests_failed;
#ifndef CONFIG_THUMB2_KERNEL
+#define RET(reg) "mov pc, "#reg
+
long arm_func(long r0, long r1);
static void __used __naked __arm_kprobes_test_func(void)
@@ -245,7 +247,7 @@ static void __used __naked __arm_kprobes_test_func(void)
".type arm_func, %%function \n\t"
"arm_func: \n\t"
"adds r0, r0, r1 \n\t"
- "bx lr \n\t"
+ "mov pc, lr \n\t"
".code "NORMAL_ISA /* Back to Thumb if necessary */
: : : "r0", "r1", "cc"
);
@@ -253,6 +255,8 @@ static void __used __naked __arm_kprobes_test_func(void)
#else /* CONFIG_THUMB2_KERNEL */
+#define RET(reg) "bx "#reg
+
long thumb16_func(long r0, long r1);
long thumb32even_func(long r0, long r1);
long thumb32odd_func(long r0, long r1);
@@ -494,7 +498,7 @@ static void __naked benchmark_nop(void)
{
__asm__ __volatile__ (
"nop \n\t"
- "bx lr"
+ RET(lr)" \n\t"
);
}
@@ -977,7 +981,7 @@ void __naked __kprobes_test_case_start(void)
"bic r0, lr, #1 @ r0 = inline data \n\t"
"mov r1, sp \n\t"
"bl kprobes_test_case_start \n\t"
- "bx r0 \n\t"
+ RET(r0)" \n\t"
);
}
@@ -1056,15 +1060,6 @@ static int test_case_run_count;
static bool test_case_is_thumb;
static int test_instance;
-/*
- * We ignore the state of the imprecise abort disable flag (CPSR.A) because this
- * can change randomly as the kernel doesn't take care to preserve or initialise
- * this across context switches. Also, with Security Extentions, the flag may
- * not be under control of the kernel; for this reason we ignore the state of
- * the FIQ disable flag CPSR.F as well.
- */
-#define PSR_IGNORE_BITS (PSR_A_BIT | PSR_F_BIT)
-
static unsigned long test_check_cc(int cc, unsigned long cpsr)
{
int ret = arm_check_condition(cc << 28, cpsr);
@@ -1196,6 +1191,13 @@ static void setup_test_context(struct pt_regs *regs)
regs->uregs[arg->reg] =
(unsigned long)current_stack + arg->val;
memory_needs_checking = true;
+ /*
+ * Test memory at an address below SP is in danger of
+ * being altered by an interrupt occurring and pushing
+ * data onto the stack. Disable interrupts to stop this.
+ */
+ if (arg->reg == 13)
+ regs->ARM_cpsr |= PSR_I_BIT;
break;
}
case ARG_TYPE_MEM: {
@@ -1264,14 +1266,26 @@ test_case_pre_handler(struct kprobe *p, struct pt_regs *regs)
static int __kprobes
test_after_pre_handler(struct kprobe *p, struct pt_regs *regs)
{
+ struct test_arg *args;
+
if (container_of(p, struct test_probe, kprobe)->hit == test_instance)
return 0; /* Already run for this test instance */
result_regs = *regs;
+
+ /* Mask out results which are indeterminate */
result_regs.ARM_cpsr &= ~PSR_IGNORE_BITS;
+ for (args = current_args; args[0].type != ARG_TYPE_END; ++args)
+ if (args[0].type == ARG_TYPE_REG_MASKED) {
+ struct test_arg_regptr *arg =
+ (struct test_arg_regptr *)args;
+ result_regs.uregs[arg->reg] &= arg->val;
+ }
/* Undo any changes done to SP by the test case */
regs->ARM_sp = (unsigned long)current_stack;
+ /* Enable interrupts in case setup_test_context disabled them */
+ regs->ARM_cpsr &= ~PSR_I_BIT;
container_of(p, struct test_probe, kprobe)->hit = test_instance;
return 0;
diff --git a/arch/arm/kernel/kprobes-test.h b/arch/arm/probes/kprobes/test-core.h
index 4430990e90e7..94285203e9f7 100644
--- a/arch/arm/kernel/kprobes-test.h
+++ b/arch/arm/probes/kprobes/test-core.h
@@ -1,5 +1,5 @@
/*
- * arch/arm/kernel/kprobes-test.h
+ * arch/arm/probes/kprobes/test-core.h
*
* Copyright (C) 2011 Jon Medhurst <tixy@yxit.co.uk>.
*
@@ -45,10 +45,11 @@ extern int kprobe_test_cc_position;
*
*/
-#define ARG_TYPE_END 0
-#define ARG_TYPE_REG 1
-#define ARG_TYPE_PTR 2
-#define ARG_TYPE_MEM 3
+#define ARG_TYPE_END 0
+#define ARG_TYPE_REG 1
+#define ARG_TYPE_PTR 2
+#define ARG_TYPE_MEM 3
+#define ARG_TYPE_REG_MASKED 4
#define ARG_FLAG_UNSUPPORTED 0x01
#define ARG_FLAG_SUPPORTED 0x02
@@ -61,7 +62,7 @@ struct test_arg {
};
struct test_arg_regptr {
- u8 type; /* ARG_TYPE_REG or ARG_TYPE_PTR */
+ u8 type; /* ARG_TYPE_REG or ARG_TYPE_PTR or ARG_TYPE_REG_MASKED */
u8 reg;
u8 _padding[2];
u32 val;
@@ -138,6 +139,12 @@ struct test_arg_end {
".short 0 \n\t" \
".word "#val" \n\t"
+#define TEST_ARG_REG_MASKED(reg, val) \
+ ".byte "__stringify(ARG_TYPE_REG_MASKED)" \n\t" \
+ ".byte "#reg" \n\t" \
+ ".short 0 \n\t" \
+ ".word "#val" \n\t"
+
#define TEST_ARG_END(flags) \
".byte "__stringify(ARG_TYPE_END)" \n\t" \
".byte "TEST_ISA flags" \n\t" \
@@ -395,6 +402,22 @@ struct test_arg_end {
" "codex" \n\t" \
TESTCASE_END
+#define TEST_RMASKED(code1, reg, mask, code2) \
+ TESTCASE_START(code1 #reg code2) \
+ TEST_ARG_REG_MASKED(reg, mask) \
+ TEST_ARG_END("") \
+ TEST_INSTRUCTION(code1 #reg code2) \
+ TESTCASE_END
+
+/*
+ * We ignore the state of the imprecise abort disable flag (CPSR.A) because this
+ * can change randomly as the kernel doesn't take care to preserve or initialise
+ * this across context switches. Also, with Security Extensions, the flag may
+ * not be under control of the kernel; for this reason we ignore the state of
+ * the FIQ disable flag CPSR.F as well.
+ */
+#define PSR_IGNORE_BITS (PSR_A_BIT | PSR_F_BIT)
+
/*
* Macros for defining space directives spread over multiple lines.
diff --git a/arch/arm/kernel/kprobes-test-thumb.c b/arch/arm/probes/kprobes/test-thumb.c
index 844dd10d8593..b683b4517458 100644
--- a/arch/arm/kernel/kprobes-test-thumb.c
+++ b/arch/arm/probes/kprobes/test-thumb.c
@@ -1,5 +1,5 @@
/*
- * arch/arm/kernel/kprobes-test-thumb.c
+ * arch/arm/probes/kprobes/test-thumb.c
*
* Copyright (C) 2011 Jon Medhurst <tixy@yxit.co.uk>.
*
@@ -11,8 +11,9 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <asm/opcodes.h>
+#include <asm/probes.h>
-#include "kprobes-test.h"
+#include "test-core.h"
#define TEST_ISA "16"
@@ -416,6 +417,9 @@ void kprobe_thumb32_test_cases(void)
TEST_RR( "strd r",14,VAL2,", r",12,VAL1,", [sp, #16]!")
TEST_RRP("strd r",1, VAL1,", r",0, VAL2,", [r",7, 24,"], #16")
TEST_RR( "strd r",7, VAL2,", r",8, VAL1,", [sp], #-16")
+ TEST_RRP("strd r",6, VAL1,", r",7, VAL2,", [r",13, TEST_MEMORY_SIZE,", #-"__stringify(MAX_STACK_SIZE)"]!")
+ TEST_UNSUPPORTED("strd r6, r7, [r13, #-"__stringify(MAX_STACK_SIZE)"-8]!")
+ TEST_RRP("strd r",4, VAL1,", r",5, VAL2,", [r",14, TEST_MEMORY_SIZE,", #-"__stringify(MAX_STACK_SIZE)"-8]!")
TEST_UNSUPPORTED(__inst_thumb32(0xe9efec04) " @ strd r14, r12, [pc, #16]!")
TEST_UNSUPPORTED(__inst_thumb32(0xe8efec04) " @ strd r14, r12, [pc], #16")
@@ -774,8 +778,8 @@ CONDITION_INSTRUCTIONS(22,
TEST_UNSUPPORTED("subs pc, lr, #4")
- TEST("mrs r0, cpsr")
- TEST("mrs r14, cpsr")
+ TEST_RMASKED("mrs r",0,~PSR_IGNORE_BITS,", cpsr")
+ TEST_RMASKED("mrs r",14,~PSR_IGNORE_BITS,", cpsr")
TEST_UNSUPPORTED(__inst_thumb32(0xf3ef8d00) " @ mrs sp, spsr")
TEST_UNSUPPORTED(__inst_thumb32(0xf3ef8f00) " @ mrs pc, spsr")
TEST_UNSUPPORTED("mrs r0, spsr")
@@ -821,14 +825,22 @@ CONDITION_INSTRUCTIONS(22,
TEST_RP( "str"size" r",14,VAL2,", [r",1, 256, ", #-128]!") \
TEST_RPR("str"size".w r",0, VAL1,", [r",1, 0,", r",2, 4,"]") \
TEST_RPR("str"size" r",14,VAL2,", [r",10,0,", r",11,4,", lsl #1]") \
+ TEST_UNSUPPORTED("str"size" r0, [r13, r1]") \
TEST_R( "str"size".w r",7, VAL1,", [sp, #24]") \
TEST_RP( "str"size".w r",0, VAL2,", [r",0,0, "]") \
+ TEST_RP( "str"size" r",6, VAL1,", [r",13, TEST_MEMORY_SIZE,", #-"__stringify(MAX_STACK_SIZE)"]!") \
+ TEST_UNSUPPORTED("str"size" r6, [r13, #-"__stringify(MAX_STACK_SIZE)"-8]!") \
+ TEST_RP( "str"size" r",4, VAL2,", [r",12, TEST_MEMORY_SIZE,", #-"__stringify(MAX_STACK_SIZE)"-8]!") \
TEST_UNSUPPORTED("str"size"t r0, [r1, #4]")
SINGLE_STORE("b")
SINGLE_STORE("h")
SINGLE_STORE("")
+ TEST_UNSUPPORTED(__inst_thumb32(0xf801000d) " @ strb r0, [r1, r13]")
+ TEST_UNSUPPORTED(__inst_thumb32(0xf821000d) " @ strh r0, [r1, r13]")
+ TEST_UNSUPPORTED(__inst_thumb32(0xf841000d) " @ str r0, [r1, r13]")
+
TEST("str sp, [sp]")
TEST_UNSUPPORTED(__inst_thumb32(0xf8cfe000) " @ str r14, [pc]")
TEST_UNSUPPORTED(__inst_thumb32(0xf8cef000) " @ str pc, [r14]")
diff --git a/arch/arm/probes/uprobes/Makefile b/arch/arm/probes/uprobes/Makefile
new file mode 100644
index 000000000000..e1dc3d0f6d5a
--- /dev/null
+++ b/arch/arm/probes/uprobes/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_UPROBES) += core.o actions-arm.o
diff --git a/arch/arm/kernel/uprobes-arm.c b/arch/arm/probes/uprobes/actions-arm.c
index d3b655ff17da..76eb44972ebe 100644
--- a/arch/arm/kernel/uprobes-arm.c
+++ b/arch/arm/probes/uprobes/actions-arm.c
@@ -13,9 +13,9 @@
#include <linux/uprobes.h>
#include <linux/module.h>
-#include "probes.h"
-#include "probes-arm.h"
-#include "uprobes.h"
+#include "../decode.h"
+#include "../decode-arm.h"
+#include "core.h"
static int uprobes_substitute_pc(unsigned long *pinsn, u32 oregs)
{
@@ -195,8 +195,6 @@ uprobe_decode_ldmstm(probes_opcode_t insn,
}
const union decode_action uprobes_probes_actions[] = {
- [PROBES_EMULATE_NONE] = {.handler = probes_simulate_nop},
- [PROBES_SIMULATE_NOP] = {.handler = probes_simulate_nop},
[PROBES_PRELOAD_IMM] = {.handler = probes_simulate_nop},
[PROBES_PRELOAD_REG] = {.handler = probes_simulate_nop},
[PROBES_BRANCH_IMM] = {.handler = simulate_blx1},
diff --git a/arch/arm/kernel/uprobes.c b/arch/arm/probes/uprobes/core.c
index 56adf9c1fde0..d1329f1ba4e4 100644
--- a/arch/arm/kernel/uprobes.c
+++ b/arch/arm/probes/uprobes/core.c
@@ -17,9 +17,9 @@
#include <asm/opcodes.h>
#include <asm/traps.h>
-#include "probes.h"
-#include "probes-arm.h"
-#include "uprobes.h"
+#include "../decode.h"
+#include "../decode-arm.h"
+#include "core.h"
#define UPROBE_TRAP_NR UINT_MAX
@@ -88,7 +88,7 @@ int arch_uprobe_analyze_insn(struct arch_uprobe *auprobe, struct mm_struct *mm,
auprobe->ixol[1] = __opcode_to_mem_arm(UPROBE_SS_ARM_INSN);
ret = arm_probes_decode_insn(insn, &auprobe->asi, false,
- uprobes_probes_actions);
+ uprobes_probes_actions, NULL);
switch (ret) {
case INSN_REJECTED:
return -EINVAL;
diff --git a/arch/arm/kernel/uprobes.h b/arch/arm/probes/uprobes/core.h
index 1d0c12dfbd03..1d0c12dfbd03 100644
--- a/arch/arm/kernel/uprobes.h
+++ b/arch/arm/probes/uprobes/core.h
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-07 10:34:05 +0000