x86: x86-64 ptrace debugreg cleanup

This cleans up the 64-bit ptrace code to separate the guts of the
debug register access from the implementation of PTRACE_PEEKUSR and
PTRACE_POKEUSR.  The new functions ptrace_[gs]et_debugreg are made
global so that the ia32 code can later be changed to call them too.

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/asm-x86/ptrace.h b/include/asm-x86/ptrace.h
index fe75422f034b..d223decd7b01 100644
--- a/include/asm-x86/ptrace.h
+++ b/include/asm-x86/ptrace.h
@@ -110,6 +110,9 @@ void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
 
 struct task_struct;
 
+extern unsigned long ptrace_get_debugreg(struct task_struct *child, int n);
+extern int ptrace_set_debugreg(struct task_struct *child, int n, unsigned long);
+
 extern unsigned long
 convert_rip_to_linear(struct task_struct *child, struct pt_regs *regs);