Make lwp_info.arch_private handling shared

This commit moves the code to handle lwp_info.arch_private for
Linux x86 into a new shared file, nat/x86-linux.c.

gdb/ChangeLog:

	* nat/x86-linux.h: New file.
	* nat/x86-linux.c: Likewise.
	* Makefile.in (HFILES_NO_SRCDIR): Add nat/x86-linux.h.
	(x86-linux.o): New rule.
	* config/i386/linux.mh (NATDEPFILES): Add x86-linux.o.
	* config/i386/linux64.mh (NATDEPFILES): Likewise.
	* nat/linux-nat.h (struct arch_lwp_info): New forward declaration.
	(lwp_set_arch_private_info): New declaration.
	(lwp_arch_private_info): Likewise.
	* linux-nat.c (lwp_set_arch_private_info): New function.
	(lwp_arch_private_info): Likewise.
	* x86-linux-nat.c: Include nat/x86-linux.h.
	(arch_lwp_info): Removed structure.
	(update_debug_registers_callback):
	Use lwp_set_debug_registers_changed.
	(x86_linux_prepare_to_resume): Use lwp_debug_registers_changed
	and lwp_set_debug_registers_changed.
	(x86_linux_new_thread): Use lwp_set_debug_registers_changed.

gdb/gdbserver/ChangeLog:

	* Makefile.in (x86-linux.o): New rule.
	* configure.srv: Add x86-linux.o to relevant targets.
	* linux-low.c (lwp_set_arch_private_info): New function.
	(lwp_arch_private_info): Likewise.
	* linux-x86-low.c: Include nat/x86-linux.h.
	(arch_lwp_info): Removed structure.
	(update_debug_registers_callback):
	Use lwp_set_debug_registers_changed.
	(x86_linux_prepare_to_resume): Use lwp_debug_registers_changed
	and lwp_set_debug_registers_changed.
	(x86_linux_new_thread): Use lwp_set_debug_registers_changed.

1 files changed, 5 insertions, 17 deletions

diff --git a/gdb/x86-linux-nat.c b/gdb/x86-linux-nat.c
index 74b48e378ee..10ccbd67968 100644
--- a/gdb/x86-linux-nat.c
+++ b/gdb/x86-linux-nat.c
@@ -39,6 +39,7 @@
 #include "x86-xstate.h"
 #include "nat/linux-btrace.h"
 #include "nat/linux-nat.h"
+#include "nat/x86-linux.h"
 
 /* Per-thread arch-specific data we want to keep.  */
 
@@ -133,12 +134,9 @@ x86_linux_dr_get_status (void)
 static int
 update_debug_registers_callback (struct lwp_info *lwp, void *arg)
 {
-  if (lwp->arch_private == NULL)
-    lwp->arch_private = XCNEW (struct arch_lwp_info);
-
   /* The actual update is done later just before resuming the lwp, we
      just mark that the registers need updating.  */
-  lwp->arch_private->debug_registers_changed = 1;
+  lwp_set_debug_registers_changed (lwp, 1);
 
   /* If the lwp isn't stopped, force it to momentarily pause, so we
      can update its debug registers.  */
@@ -181,13 +179,7 @@ x86_linux_prepare_to_resume (struct lwp_info *lwp)
   ptid_t ptid = ptid_of_lwp (lwp);
   int clear_status = 0;
 
-  /* NULL means this is the main thread still going through the shell,
-     or, no watchpoint has been set yet.  In that case, there's
-     nothing to do.  */
-  if (lwp->arch_private == NULL)
-    return;
-
-  if (lwp->arch_private->debug_registers_changed)
+  if (lwp_debug_registers_changed (lwp))
     {
       struct x86_debug_reg_state *state
 	= x86_debug_reg_state (ptid_get_pid (ptid));
@@ -222,7 +214,7 @@ x86_linux_prepare_to_resume (struct lwp_info *lwp)
       if (state->dr_control_mirror != 0)
 	x86_linux_dr_set (ptid, DR_CONTROL, state->dr_control_mirror);
 
-      lwp->arch_private->debug_registers_changed = 0;
+      lwp_set_debug_registers_changed (lwp, 0);
     }
 
   if (clear_status
@@ -233,11 +225,7 @@ x86_linux_prepare_to_resume (struct lwp_info *lwp)
 static void
 x86_linux_new_thread (struct lwp_info *lp)
 {
-  struct arch_lwp_info *info = XCNEW (struct arch_lwp_info);
-
-  info->debug_registers_changed = 1;
-
-  lp->arch_private = info;
+  lwp_set_debug_registers_changed (lp, 1);
 }