v4.19.13 snapshot.
diff --git a/include/linux/uprobes.h b/include/linux/uprobes.h
new file mode 100644
index 0000000..bb9d208
--- /dev/null
+++ b/include/linux/uprobes.h
@@ -0,0 +1,207 @@
+#ifndef _LINUX_UPROBES_H
+#define _LINUX_UPROBES_H
+/*
+ * User-space 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, 2008-2012
+ * Authors:
+ * Srikar Dronamraju
+ * Jim Keniston
+ * Copyright (C) 2011-2012 Red Hat, Inc., Peter Zijlstra
+ */
+
+#include <linux/errno.h>
+#include <linux/rbtree.h>
+#include <linux/types.h>
+#include <linux/wait.h>
+
+struct vm_area_struct;
+struct mm_struct;
+struct inode;
+struct notifier_block;
+struct page;
+
+#define UPROBE_HANDLER_REMOVE 1
+#define UPROBE_HANDLER_MASK 1
+
+#define MAX_URETPROBE_DEPTH 64
+
+enum uprobe_filter_ctx {
+ UPROBE_FILTER_REGISTER,
+ UPROBE_FILTER_UNREGISTER,
+ UPROBE_FILTER_MMAP,
+};
+
+struct uprobe_consumer {
+ int (*handler)(struct uprobe_consumer *self, struct pt_regs *regs);
+ int (*ret_handler)(struct uprobe_consumer *self,
+ unsigned long func,
+ struct pt_regs *regs);
+ bool (*filter)(struct uprobe_consumer *self,
+ enum uprobe_filter_ctx ctx,
+ struct mm_struct *mm);
+
+ struct uprobe_consumer *next;
+};
+
+#ifdef CONFIG_UPROBES
+#include <asm/uprobes.h>
+
+enum uprobe_task_state {
+ UTASK_RUNNING,
+ UTASK_SSTEP,
+ UTASK_SSTEP_ACK,
+ UTASK_SSTEP_TRAPPED,
+};
+
+/*
+ * uprobe_task: Metadata of a task while it singlesteps.
+ */
+struct uprobe_task {
+ enum uprobe_task_state state;
+
+ union {
+ struct {
+ struct arch_uprobe_task autask;
+ unsigned long vaddr;
+ };
+
+ struct {
+ struct callback_head dup_xol_work;
+ unsigned long dup_xol_addr;
+ };
+ };
+
+ struct uprobe *active_uprobe;
+ unsigned long xol_vaddr;
+
+ struct return_instance *return_instances;
+ unsigned int depth;
+};
+
+struct return_instance {
+ struct uprobe *uprobe;
+ unsigned long func;
+ unsigned long stack; /* stack pointer */
+ unsigned long orig_ret_vaddr; /* original return address */
+ bool chained; /* true, if instance is nested */
+
+ struct return_instance *next; /* keep as stack */
+};
+
+enum rp_check {
+ RP_CHECK_CALL,
+ RP_CHECK_CHAIN_CALL,
+ RP_CHECK_RET,
+};
+
+struct xol_area;
+
+struct uprobes_state {
+ struct xol_area *xol_area;
+};
+
+extern int set_swbp(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long vaddr);
+extern int set_orig_insn(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long vaddr);
+extern bool is_swbp_insn(uprobe_opcode_t *insn);
+extern bool is_trap_insn(uprobe_opcode_t *insn);
+extern unsigned long uprobe_get_swbp_addr(struct pt_regs *regs);
+extern unsigned long uprobe_get_trap_addr(struct pt_regs *regs);
+extern int uprobe_write_opcode(struct arch_uprobe *auprobe, struct mm_struct *mm, unsigned long vaddr, uprobe_opcode_t);
+extern int uprobe_register(struct inode *inode, loff_t offset, struct uprobe_consumer *uc);
+extern int uprobe_apply(struct inode *inode, loff_t offset, struct uprobe_consumer *uc, bool);
+extern void uprobe_unregister(struct inode *inode, loff_t offset, struct uprobe_consumer *uc);
+extern int uprobe_mmap(struct vm_area_struct *vma);
+extern void uprobe_munmap(struct vm_area_struct *vma, unsigned long start, unsigned long end);
+extern void uprobe_start_dup_mmap(void);
+extern void uprobe_end_dup_mmap(void);
+extern void uprobe_dup_mmap(struct mm_struct *oldmm, struct mm_struct *newmm);
+extern void uprobe_free_utask(struct task_struct *t);
+extern void uprobe_copy_process(struct task_struct *t, unsigned long flags);
+extern int uprobe_post_sstep_notifier(struct pt_regs *regs);
+extern int uprobe_pre_sstep_notifier(struct pt_regs *regs);
+extern void uprobe_notify_resume(struct pt_regs *regs);
+extern bool uprobe_deny_signal(void);
+extern bool arch_uprobe_skip_sstep(struct arch_uprobe *aup, struct pt_regs *regs);
+extern void uprobe_clear_state(struct mm_struct *mm);
+extern int arch_uprobe_analyze_insn(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long addr);
+extern int arch_uprobe_pre_xol(struct arch_uprobe *aup, struct pt_regs *regs);
+extern int arch_uprobe_post_xol(struct arch_uprobe *aup, struct pt_regs *regs);
+extern bool arch_uprobe_xol_was_trapped(struct task_struct *tsk);
+extern int arch_uprobe_exception_notify(struct notifier_block *self, unsigned long val, void *data);
+extern void arch_uprobe_abort_xol(struct arch_uprobe *aup, struct pt_regs *regs);
+extern unsigned long arch_uretprobe_hijack_return_addr(unsigned long trampoline_vaddr, struct pt_regs *regs);
+extern bool arch_uretprobe_is_alive(struct return_instance *ret, enum rp_check ctx, struct pt_regs *regs);
+extern bool arch_uprobe_ignore(struct arch_uprobe *aup, struct pt_regs *regs);
+extern void arch_uprobe_copy_ixol(struct page *page, unsigned long vaddr,
+ void *src, unsigned long len);
+#else /* !CONFIG_UPROBES */
+struct uprobes_state {
+};
+
+#define uprobe_get_trap_addr(regs) instruction_pointer(regs)
+
+static inline int
+uprobe_register(struct inode *inode, loff_t offset, struct uprobe_consumer *uc)
+{
+ return -ENOSYS;
+}
+static inline int
+uprobe_apply(struct inode *inode, loff_t offset, struct uprobe_consumer *uc, bool add)
+{
+ return -ENOSYS;
+}
+static inline void
+uprobe_unregister(struct inode *inode, loff_t offset, struct uprobe_consumer *uc)
+{
+}
+static inline int uprobe_mmap(struct vm_area_struct *vma)
+{
+ return 0;
+}
+static inline void
+uprobe_munmap(struct vm_area_struct *vma, unsigned long start, unsigned long end)
+{
+}
+static inline void uprobe_start_dup_mmap(void)
+{
+}
+static inline void uprobe_end_dup_mmap(void)
+{
+}
+static inline void
+uprobe_dup_mmap(struct mm_struct *oldmm, struct mm_struct *newmm)
+{
+}
+static inline void uprobe_notify_resume(struct pt_regs *regs)
+{
+}
+static inline bool uprobe_deny_signal(void)
+{
+ return false;
+}
+static inline void uprobe_free_utask(struct task_struct *t)
+{
+}
+static inline void uprobe_copy_process(struct task_struct *t, unsigned long flags)
+{
+}
+static inline void uprobe_clear_state(struct mm_struct *mm)
+{
+}
+#endif /* !CONFIG_UPROBES */
+#endif /* _LINUX_UPROBES_H */