1 files changed, 98 insertions, 0 deletions

diff --git a/include/linux/uprobes.h b/include/linux/uprobes.h
new file mode 100644
index 000000000000..f1d13fd140f2
--- /dev/null
+++ b/include/linux/uprobes.h
@@ -0,0 +1,98 @@
+#ifndef _LINUX_UPROBES_H
+#define _LINUX_UPROBES_H
+/*
+ * Userspace Probes (UProbes)
+ *
+ * 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, 2008-2011
+ * Authors:
+ *      Srikar Dronamraju
+ *      Jim Keniston
+ */
+
+#include <linux/errno.h>
+#include <linux/rbtree.h>
+
+struct vm_area_struct;
+#ifdef CONFIG_ARCH_SUPPORTS_UPROBES
+#include <asm/uprobes.h>
+#else
+
+typedef u8 uprobe_opcode_t;
+struct uprobe_arch_info {};
+
+#define MAX_UINSN_BYTES 4
+#endif
+
+#define uprobe_opcode_sz sizeof(uprobe_opcode_t)
+
+/* flags that denote/change uprobes behaviour */
+/* Have a copy of original instruction */
+#define UPROBES_COPY_INSN       0x1
+/* Dont run handlers when first register/ last unregister in progress*/
+#define UPROBES_RUN_HANDLER     0x2
+
+struct uprobe_consumer {
+        int (*handler)(struct uprobe_consumer *self, struct pt_regs *regs);
+        /*
+         * filter is optional; If a filter exists, handler is run
+         * if and only if filter returns true.
+         */
+        bool (*filter)(struct uprobe_consumer *self, struct task_struct *task);
+
+        struct uprobe_consumer *next;
+};
+
+struct uprobe {
+        struct rb_node          rb_node;        /* node in the rb tree */
+        atomic_t                ref;
+        struct rw_semaphore     consumer_rwsem;
+        struct list_head        pending_list;
+        struct uprobe_arch_info arch_info;
+        struct uprobe_consumer  *consumers;
+        struct inode            *inode;         /* Also hold a ref to inode */
+        loff_t                  offset;
+        int                     flags;
+        u8                      insn[MAX_UINSN_BYTES];
+};
+
+#ifdef CONFIG_UPROBES
+extern int __weak set_bkpt(struct mm_struct *mm, struct uprobe *uprobe,
+                                                        unsigned long vaddr);
+extern int __weak set_orig_insn(struct mm_struct *mm, struct uprobe *uprobe,
+                                        unsigned long vaddr, bool verify);
+extern bool __weak is_bkpt_insn(uprobe_opcode_t *insn);
+extern int register_uprobe(struct inode *inode, loff_t offset,
+                                struct uprobe_consumer *consumer);
+extern void unregister_uprobe(struct inode *inode, loff_t offset,
+                                struct uprobe_consumer *consumer);
+extern int mmap_uprobe(struct vm_area_struct *vma);
+#else /* CONFIG_UPROBES is not defined */
+static inline int register_uprobe(struct inode *inode, loff_t offset,
+                                struct uprobe_consumer *consumer)
+{
+        return -ENOSYS;
+}
+static inline void unregister_uprobe(struct inode *inode, loff_t offset,
+                                struct uprobe_consumer *consumer)
+{
+}
+static inline int mmap_uprobe(struct vm_area_struct *vma)
+{
+        return 0;
+}
+#endif /* CONFIG_UPROBES */
+#endif  /* _LINUX_UPROBES_H */