x86: kprobes code for x86 unification
This patch unifies kprobes code.
- Unify kprobes_*.h to kprobes.h
- Unify kprobes_*.c to kprobes.c
(Differences are separated by ifdefs)
- Most differences are related to REX prefix and rip relatives.
- Two inline assembly code are different.
- One difference in kprobe_handlre()
- One fixup exception code is different, but it will be unified
if mm/extable_*.c are unified.
- Merge history logs into arch/x86/kernel/kprobes.c.
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Signed-off-by: Jim Keniston <jkenisto@us.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/include/asm-x86/kprobes.h b/include/asm-x86/kprobes.h
index b7bbd25..6e6371a 100644
--- a/include/asm-x86/kprobes.h
+++ b/include/asm-x86/kprobes.h
@@ -1,5 +1,98 @@
-#ifdef CONFIG_X86_32
-# include "kprobes_32.h"
-#else
-# include "kprobes_64.h"
-#endif
+#ifndef _ASM_KPROBES_H
+#define _ASM_KPROBES_H
+/*
+ * Kernel Probes (KProbes)
+ *
+ * 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
+ *
+ * See arch/x86/kernel/kprobes.c for x86 kprobes history.
+ */
+#include <linux/types.h>
+#include <linux/ptrace.h>
+#include <linux/percpu.h>
+
+#define __ARCH_WANT_KPROBES_INSN_SLOT
+
+struct pt_regs;
+struct kprobe;
+
+typedef u8 kprobe_opcode_t;
+#define BREAKPOINT_INSTRUCTION 0xcc
+#define RELATIVEJUMP_INSTRUCTION 0xe9
+#define MAX_INSN_SIZE 16
+#define MAX_STACK_SIZE 64
+#define MIN_STACK_SIZE(ADDR) (((MAX_STACK_SIZE) < \
+ (((unsigned long)current_thread_info()) + THREAD_SIZE \
+ - (unsigned long)(ADDR))) \
+ ? (MAX_STACK_SIZE) \
+ : (((unsigned long)current_thread_info()) + THREAD_SIZE \
+ - (unsigned long)(ADDR)))
+
+#define ARCH_SUPPORTS_KRETPROBES
+#define flush_insn_slot(p) do { } while (0)
+
+extern const int kretprobe_blacklist_size;
+
+void arch_remove_kprobe(struct kprobe *p);
+void kretprobe_trampoline(void);
+
+/* Architecture specific copy of original instruction*/
+struct arch_specific_insn {
+ /* copy of the original instruction */
+ kprobe_opcode_t *insn;
+ /*
+ * boostable = -1: This instruction type is not boostable.
+ * boostable = 0: This instruction type is boostable.
+ * boostable = 1: This instruction has been boosted: we have
+ * added a relative jump after the instruction copy in insn,
+ * so no single-step and fixup are needed (unless there's
+ * a post_handler or break_handler).
+ */
+ int boostable;
+};
+
+struct prev_kprobe {
+ struct kprobe *kp;
+ unsigned long status;
+ unsigned long old_flags;
+ unsigned long saved_flags;
+};
+
+/* per-cpu kprobe control block */
+struct kprobe_ctlblk {
+ unsigned long kprobe_status;
+ unsigned long kprobe_old_flags;
+ unsigned long kprobe_saved_flags;
+ unsigned long *jprobe_saved_sp;
+ struct pt_regs jprobe_saved_regs;
+ kprobe_opcode_t jprobes_stack[MAX_STACK_SIZE];
+ struct prev_kprobe prev_kprobe;
+};
+
+/* trap3/1 are intr gates for kprobes. So, restore the status of IF,
+ * if necessary, before executing the original int3/1 (trap) handler.
+ */
+static inline void restore_interrupts(struct pt_regs *regs)
+{
+ if (regs->flags & IF_MASK)
+ local_irq_enable();
+}
+
+extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
+extern int kprobe_exceptions_notify(struct notifier_block *self,
+ unsigned long val, void *data);
+#endif /* _ASM_KPROBES_H */
diff --git a/include/asm-x86/kprobes_32.h b/include/asm-x86/kprobes_32.h
deleted file mode 100644
index 94dff09..0000000
--- a/include/asm-x86/kprobes_32.h
+++ /dev/null
@@ -1,102 +0,0 @@
-#ifndef _ASM_KPROBES_H
-#define _ASM_KPROBES_H
-/*
- * Kernel Probes (KProbes)
- *
- * 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
- *
- * 2002-Oct Created by Vamsi Krishna S <vamsi_krishna@in.ibm.com> Kernel
- * Probes initial implementation ( includes suggestions from
- * Rusty Russell).
- * 2004-Oct Prasanna S Panchamukhi <prasanna@in.ibm.com> and Jim Keniston
- * kenistoj@us.ibm.com adopted from i386.
- */
-#include <linux/types.h>
-#include <linux/ptrace.h>
-#include <linux/percpu.h>
-
-#define __ARCH_WANT_KPROBES_INSN_SLOT
-
-struct pt_regs;
-struct kprobe;
-
-typedef u8 kprobe_opcode_t;
-#define BREAKPOINT_INSTRUCTION 0xcc
-#define RELATIVEJUMP_INSTRUCTION 0xe9
-#define MAX_INSN_SIZE 16
-#define MAX_STACK_SIZE 64
-#define MIN_STACK_SIZE(ADDR) (((MAX_STACK_SIZE) < \
- (((unsigned long)current_thread_info()) + THREAD_SIZE \
- - (unsigned long)(ADDR))) \
- ? (MAX_STACK_SIZE) \
- : (((unsigned long)current_thread_info()) + THREAD_SIZE \
- - (unsigned long)(ADDR)))
-
-#define ARCH_SUPPORTS_KRETPROBES
-#define flush_insn_slot(p) do { } while (0)
-
-extern const int kretprobe_blacklist_size;
-
-void arch_remove_kprobe(struct kprobe *p);
-void kretprobe_trampoline(void);
-
-/* Architecture specific copy of original instruction*/
-struct arch_specific_insn {
- /* copy of the original instruction */
- kprobe_opcode_t *insn;
- /*
- * boostable = -1: This instruction type is not boostable.
- * boostable = 0: This instruction type is boostable.
- * boostable = 1: This instruction has been boosted: we have
- * added a relative jump after the instruction copy in insn,
- * so no single-step and fixup are needed (unless there's
- * a post_handler or break_handler).
- */
- int boostable;
-};
-
-struct prev_kprobe {
- struct kprobe *kp;
- unsigned long status;
- unsigned long old_flags;
- unsigned long saved_flags;
-};
-
-/* per-cpu kprobe control block */
-struct kprobe_ctlblk {
- unsigned long kprobe_status;
- unsigned long kprobe_old_flags;
- unsigned long kprobe_saved_flags;
- unsigned long *jprobe_saved_sp;
- struct pt_regs jprobe_saved_regs;
- kprobe_opcode_t jprobes_stack[MAX_STACK_SIZE];
- struct prev_kprobe prev_kprobe;
-};
-
-/* trap3/1 are intr gates for kprobes. So, restore the status of IF,
- * if necessary, before executing the original int3/1 (trap) handler.
- */
-static inline void restore_interrupts(struct pt_regs *regs)
-{
- if (regs->flags & IF_MASK)
- local_irq_enable();
-}
-
-extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
-extern int kprobe_exceptions_notify(struct notifier_block *self,
- unsigned long val, void *data);
-#endif /* _ASM_KPROBES_H */
diff --git a/include/asm-x86/kprobes_64.h b/include/asm-x86/kprobes_64.h
deleted file mode 100644
index 94dff09..0000000
--- a/include/asm-x86/kprobes_64.h
+++ /dev/null
@@ -1,102 +0,0 @@
-#ifndef _ASM_KPROBES_H
-#define _ASM_KPROBES_H
-/*
- * Kernel Probes (KProbes)
- *
- * 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
- *
- * 2002-Oct Created by Vamsi Krishna S <vamsi_krishna@in.ibm.com> Kernel
- * Probes initial implementation ( includes suggestions from
- * Rusty Russell).
- * 2004-Oct Prasanna S Panchamukhi <prasanna@in.ibm.com> and Jim Keniston
- * kenistoj@us.ibm.com adopted from i386.
- */
-#include <linux/types.h>
-#include <linux/ptrace.h>
-#include <linux/percpu.h>
-
-#define __ARCH_WANT_KPROBES_INSN_SLOT
-
-struct pt_regs;
-struct kprobe;
-
-typedef u8 kprobe_opcode_t;
-#define BREAKPOINT_INSTRUCTION 0xcc
-#define RELATIVEJUMP_INSTRUCTION 0xe9
-#define MAX_INSN_SIZE 16
-#define MAX_STACK_SIZE 64
-#define MIN_STACK_SIZE(ADDR) (((MAX_STACK_SIZE) < \
- (((unsigned long)current_thread_info()) + THREAD_SIZE \
- - (unsigned long)(ADDR))) \
- ? (MAX_STACK_SIZE) \
- : (((unsigned long)current_thread_info()) + THREAD_SIZE \
- - (unsigned long)(ADDR)))
-
-#define ARCH_SUPPORTS_KRETPROBES
-#define flush_insn_slot(p) do { } while (0)
-
-extern const int kretprobe_blacklist_size;
-
-void arch_remove_kprobe(struct kprobe *p);
-void kretprobe_trampoline(void);
-
-/* Architecture specific copy of original instruction*/
-struct arch_specific_insn {
- /* copy of the original instruction */
- kprobe_opcode_t *insn;
- /*
- * boostable = -1: This instruction type is not boostable.
- * boostable = 0: This instruction type is boostable.
- * boostable = 1: This instruction has been boosted: we have
- * added a relative jump after the instruction copy in insn,
- * so no single-step and fixup are needed (unless there's
- * a post_handler or break_handler).
- */
- int boostable;
-};
-
-struct prev_kprobe {
- struct kprobe *kp;
- unsigned long status;
- unsigned long old_flags;
- unsigned long saved_flags;
-};
-
-/* per-cpu kprobe control block */
-struct kprobe_ctlblk {
- unsigned long kprobe_status;
- unsigned long kprobe_old_flags;
- unsigned long kprobe_saved_flags;
- unsigned long *jprobe_saved_sp;
- struct pt_regs jprobe_saved_regs;
- kprobe_opcode_t jprobes_stack[MAX_STACK_SIZE];
- struct prev_kprobe prev_kprobe;
-};
-
-/* trap3/1 are intr gates for kprobes. So, restore the status of IF,
- * if necessary, before executing the original int3/1 (trap) handler.
- */
-static inline void restore_interrupts(struct pt_regs *regs)
-{
- if (regs->flags & IF_MASK)
- local_irq_enable();
-}
-
-extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
-extern int kprobe_exceptions_notify(struct notifier_block *self,
- unsigned long val, void *data);
-#endif /* _ASM_KPROBES_H */