[RFC PATCH 08/23] hurd: Drop x86-specific assembly from init-first.c

[Sergey Bugaev <bugaevc@gmail.com>]

We already have the RETURN_TO macro for this exact use case, and it's already
used in the non-static code path. Use it here too.

Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
---

This was the last piece of x86 specifics in init-first.c!
(Remember, it started as sysdeps/mach/hurd/i386/init-first.c, with lots of
i386-specific assumptions about how arguments are passed and so on.)

 sysdeps/mach/hurd/x86/init-first.c | 10 +---------
 1 file changed, 1 insertion(+), 9 deletions(-)

diff --git a/sysdeps/mach/hurd/x86/init-first.c b/sysdeps/mach/hurd/x86/init-first.c
index 6f71d71b..211b2096 100644
--- a/sysdeps/mach/hurd/x86/init-first.c
+++ b/sysdeps/mach/hurd/x86/init-first.c
@@ -218,15 +218,7 @@ _hurd_stack_setup (void **argptr)
   void doinit (intptr_t *data)
     {
       init ((void **) data);
-# ifdef __x86_64__
-      asm volatile ("movq %0, %%rsp\n" /* Switch to new outermost stack.  */
-                    "xorq %%rbp, %%rbp\n" /* Clear outermost frame pointer.  */
-                    "jmp *%1" : : "r" (data), "r" (caller));
-# else
-      asm volatile ("movl %0, %%esp\n" /* Switch to new outermost stack.  */
-		    "xorl %%ebp, %%ebp\n" /* Clear outermost frame pointer.  */
-		    "jmp *%1" : : "r" (data), "r" (caller));
-# endif
+      RETURN_TO (data, caller, 0);
       __builtin_unreachable ();
     }
 
-- 
2.43.0