1 files changed, 92 insertions, 0 deletions

diff --git a/include/asm-x86/kprobes_32.h b/include/asm-x86/kprobes_32.h
new file mode 100644
index 000000000000..06f7303c30ca
--- /dev/null
+++ b/include/asm-x86/kprobes_32.h
@@ -0,0 +1,92 @@
+#ifndef _ASM_KPROBES_H
+#define _ASM_KPROBES_H
+/*
+ *  Kernel Probes (KProbes)
+ *  include/asm-i386/kprobes.h
+ *
+ * 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).
+ */
+#include <linux/types.h>
+#include <linux/ptrace.h>
+
+#define  __ARCH_WANT_KPROBES_INSN_SLOT
+
+struct kprobe;
+struct pt_regs;
+
+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 - (ADDR))) \
+        ? (MAX_STACK_SIZE) \
+        : (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR)))
+
+#define ARCH_SUPPORTS_KRETPROBES
+#define  ARCH_INACTIVE_KPROBE_COUNT 0
+#define flush_insn_slot(p)      do { } while (0)
+
+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;
+        /*
+         * If this flag is not 0, this kprobe can be boost when its
+         * post_handler and break_handler is not set.
+         */
+        int boostable;
+};
+
+struct prev_kprobe {
+        struct kprobe *kp;
+        unsigned long status;
+        unsigned long old_eflags;
+        unsigned long saved_eflags;
+};
+
+/* per-cpu kprobe control block */
+struct kprobe_ctlblk {
+        unsigned long kprobe_status;
+        unsigned long kprobe_old_eflags;
+        unsigned long kprobe_saved_eflags;
+        long *jprobe_saved_esp;
+        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->eflags & IF_MASK)
+                local_irq_enable();
+}
+
+extern int kprobe_exceptions_notify(struct notifier_block *self,
+                                    unsigned long val, void *data);
+#endif                          /* _ASM_KPROBES_H */