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authorRussell King <rmk+kernel@arm.linux.org.uk>2014-04-04 00:33:49 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2014-04-04 00:33:49 +0100
commitbce5669be3a8946952258a064ef26defeb887138 (patch)
tree117386b9909882c000f822011c5ea6fdcbab3273 /arch/arm/include/asm
parent95959e6a06720834fc80a210e37898341c63cb91 (diff)
parent566b60c04ab230b8cc3845f964306f99504b18df (diff)
Merge branch 'devel-stable' into for-next
Diffstat (limited to 'arch/arm/include/asm')
-rw-r--r--arch/arm/include/asm/kprobes.h17
-rw-r--r--arch/arm/include/asm/pmu.h2
-rw-r--r--arch/arm/include/asm/probes.h43
-rw-r--r--arch/arm/include/asm/ptrace.h14
-rw-r--r--arch/arm/include/asm/thread_info.h5
-rw-r--r--arch/arm/include/asm/uprobes.h45
6 files changed, 109 insertions, 17 deletions
diff --git a/arch/arm/include/asm/kprobes.h b/arch/arm/include/asm/kprobes.h
index f82ec22eeb11..49fa0dfaad33 100644
--- a/arch/arm/include/asm/kprobes.h
+++ b/arch/arm/include/asm/kprobes.h
@@ -18,7 +18,7 @@
#include <linux/types.h>
#include <linux/ptrace.h>
-#include <linux/percpu.h>
+#include <linux/notifier.h>
#define __ARCH_WANT_KPROBES_INSN_SLOT
#define MAX_INSN_SIZE 2
@@ -28,21 +28,10 @@
#define kretprobe_blacklist_size 0
typedef u32 kprobe_opcode_t;
-
struct kprobe;
-typedef void (kprobe_insn_handler_t)(struct kprobe *, struct pt_regs *);
-typedef unsigned long (kprobe_check_cc)(unsigned long);
-typedef void (kprobe_insn_singlestep_t)(struct kprobe *, struct pt_regs *);
-typedef void (kprobe_insn_fn_t)(void);
+#include <asm/probes.h>
-/* Architecture specific copy of original instruction. */
-struct arch_specific_insn {
- kprobe_opcode_t *insn;
- kprobe_insn_handler_t *insn_handler;
- kprobe_check_cc *insn_check_cc;
- kprobe_insn_singlestep_t *insn_singlestep;
- kprobe_insn_fn_t *insn_fn;
-};
+#define arch_specific_insn arch_probes_insn
struct prev_kprobe {
struct kprobe *kp;
diff --git a/arch/arm/include/asm/pmu.h b/arch/arm/include/asm/pmu.h
index f24edad26c70..ae1919be8f98 100644
--- a/arch/arm/include/asm/pmu.h
+++ b/arch/arm/include/asm/pmu.h
@@ -71,6 +71,8 @@ struct arm_pmu {
void (*disable)(struct perf_event *event);
int (*get_event_idx)(struct pmu_hw_events *hw_events,
struct perf_event *event);
+ void (*clear_event_idx)(struct pmu_hw_events *hw_events,
+ struct perf_event *event);
int (*set_event_filter)(struct hw_perf_event *evt,
struct perf_event_attr *attr);
u32 (*read_counter)(struct perf_event *event);
diff --git a/arch/arm/include/asm/probes.h b/arch/arm/include/asm/probes.h
new file mode 100644
index 000000000000..806cfe622a9e
--- /dev/null
+++ b/arch/arm/include/asm/probes.h
@@ -0,0 +1,43 @@
+/*
+ * arch/arm/include/asm/probes.h
+ *
+ * Original contents copied from arch/arm/include/asm/kprobes.h
+ * which contains the following notice...
+ *
+ * Copyright (C) 2006, 2007 Motorola 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 _ASM_PROBES_H
+#define _ASM_PROBES_H
+
+typedef u32 probes_opcode_t;
+
+struct arch_probes_insn;
+typedef void (probes_insn_handler_t)(probes_opcode_t,
+ struct arch_probes_insn *,
+ struct pt_regs *);
+typedef unsigned long (probes_check_cc)(unsigned long);
+typedef void (probes_insn_singlestep_t)(probes_opcode_t,
+ struct arch_probes_insn *,
+ struct pt_regs *);
+typedef void (probes_insn_fn_t)(void);
+
+/* Architecture specific copy of original instruction. */
+struct arch_probes_insn {
+ probes_opcode_t *insn;
+ probes_insn_handler_t *insn_handler;
+ probes_check_cc *insn_check_cc;
+ probes_insn_singlestep_t *insn_singlestep;
+ probes_insn_fn_t *insn_fn;
+};
+
+#endif
diff --git a/arch/arm/include/asm/ptrace.h b/arch/arm/include/asm/ptrace.h
index 04c99f36ff7f..c877654fe3bf 100644
--- a/arch/arm/include/asm/ptrace.h
+++ b/arch/arm/include/asm/ptrace.h
@@ -27,9 +27,13 @@ struct pt_regs {
#define thumb_mode(regs) (0)
#endif
+#ifndef CONFIG_CPU_V7M
#define isa_mode(regs) \
- ((((regs)->ARM_cpsr & PSR_J_BIT) >> 23) | \
- (((regs)->ARM_cpsr & PSR_T_BIT) >> 5))
+ ((((regs)->ARM_cpsr & PSR_J_BIT) >> (__ffs(PSR_J_BIT) - 1)) | \
+ (((regs)->ARM_cpsr & PSR_T_BIT) >> (__ffs(PSR_T_BIT))))
+#else
+#define isa_mode(regs) 1 /* Thumb */
+#endif
#define processor_mode(regs) \
((regs)->ARM_cpsr & MODE_MASK)
@@ -80,6 +84,12 @@ static inline long regs_return_value(struct pt_regs *regs)
#define instruction_pointer(regs) (regs)->ARM_pc
+static inline void instruction_pointer_set(struct pt_regs *regs,
+ unsigned long val)
+{
+ instruction_pointer(regs) = val;
+}
+
#ifdef CONFIG_SMP
extern unsigned long profile_pc(struct pt_regs *regs);
#else
diff --git a/arch/arm/include/asm/thread_info.h b/arch/arm/include/asm/thread_info.h
index 71a06b293489..f989d7c22dc5 100644
--- a/arch/arm/include/asm/thread_info.h
+++ b/arch/arm/include/asm/thread_info.h
@@ -153,6 +153,7 @@ extern int vfp_restore_user_hwstate(struct user_vfp __user *,
#define TIF_SIGPENDING 0
#define TIF_NEED_RESCHED 1
#define TIF_NOTIFY_RESUME 2 /* callback before returning to user */
+#define TIF_UPROBE 7
#define TIF_SYSCALL_TRACE 8
#define TIF_SYSCALL_AUDIT 9
#define TIF_SYSCALL_TRACEPOINT 10
@@ -165,6 +166,7 @@ extern int vfp_restore_user_hwstate(struct user_vfp __user *,
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
+#define _TIF_UPROBE (1 << TIF_UPROBE)
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
#define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
@@ -178,7 +180,8 @@ extern int vfp_restore_user_hwstate(struct user_vfp __user *,
/*
* Change these and you break ASM code in entry-common.S
*/
-#define _TIF_WORK_MASK (_TIF_NEED_RESCHED | _TIF_SIGPENDING | _TIF_NOTIFY_RESUME)
+#define _TIF_WORK_MASK (_TIF_NEED_RESCHED | _TIF_SIGPENDING | \
+ _TIF_NOTIFY_RESUME | _TIF_UPROBE)
#endif /* __KERNEL__ */
#endif /* __ASM_ARM_THREAD_INFO_H */
diff --git a/arch/arm/include/asm/uprobes.h b/arch/arm/include/asm/uprobes.h
new file mode 100644
index 000000000000..9472c20b7d49
--- /dev/null
+++ b/arch/arm/include/asm/uprobes.h
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2012 Rabin Vincent <rabin at rab.in>
+ *
+ * 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.
+ */
+
+#ifndef _ASM_UPROBES_H
+#define _ASM_UPROBES_H
+
+#include <asm/probes.h>
+#include <asm/opcodes.h>
+
+typedef u32 uprobe_opcode_t;
+
+#define MAX_UINSN_BYTES 4
+#define UPROBE_XOL_SLOT_BYTES 64
+
+#define UPROBE_SWBP_ARM_INSN 0xe7f001f9
+#define UPROBE_SS_ARM_INSN 0xe7f001fa
+#define UPROBE_SWBP_INSN __opcode_to_mem_arm(UPROBE_SWBP_ARM_INSN)
+#define UPROBE_SWBP_INSN_SIZE 4
+
+struct arch_uprobe_task {
+ u32 backup;
+ unsigned long saved_trap_no;
+};
+
+struct arch_uprobe {
+ u8 insn[MAX_UINSN_BYTES];
+ unsigned long ixol[2];
+ uprobe_opcode_t bpinsn;
+ bool simulate;
+ u32 pcreg;
+ void (*prehandler)(struct arch_uprobe *auprobe,
+ struct arch_uprobe_task *autask,
+ struct pt_regs *regs);
+ void (*posthandler)(struct arch_uprobe *auprobe,
+ struct arch_uprobe_task *autask,
+ struct pt_regs *regs);
+ struct arch_probes_insn asi;
+};
+
+#endif