[IA64] Synchronize RBS on PTRACE_ATTACH

When attaching to a stopped process, the RSE must be explicitly
synced to user-space, so the debugger can read the correct values.

Signed-off-by: Petr Tesarik <ptesarik@suse.cz>
CC: Roland McGrath <roland@redhat.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/asm-ia64/ptrace.h b/include/asm-ia64/ptrace.h
index 13435f778b0c..0bdce7dde1b0 100644
--- a/include/asm-ia64/ptrace.h
+++ b/include/asm-ia64/ptrace.h
@@ -310,6 +310,10 @@ struct switch_stack {
   #define arch_ptrace_stop_needed(code, info) \
         (!test_thread_flag(TIF_RESTORE_RSE))
 
+  extern void ptrace_attach_sync_user_rbs (struct task_struct *);
+  #define arch_ptrace_attach(child) \
+        ptrace_attach_sync_user_rbs(child)
+
 #endif /* !__KERNEL__ */
 
 /* pt_all_user_regs is used for PTRACE_GETREGS PTRACE_SETREGS */