ia64: update ia64-specific code to use execution context

This change follows commit 837fd5e494731d7d44786f29e7d6e8c27029806f
in '#ifdef __ia64' branches.

Noticed as a build failure by John Paul Adrian Glaubitz:

```
  cont.c:502:50: error: 'rb_thread_t {aka struct rb_thread_struct}'
    has no member named 'machine'
       size = cont->machine.register_stack_size =
           th->machine.register_stack_end - th->machine.register_stack_start;
               ^~
```

The change is trivial: update 'th->machine' usage to 'th->ec->machine'.
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62106 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 3 deletions

diff --git a/cont.c b/cont.c
index f48fd2e52b..93a64f8fe6 100644
--- a/cont.c
+++ b/cont.c
@@ -475,7 +475,7 @@ cont_save_machine_stack(rb_thread_t *th, rb_context_t *cont)
 
     SET_MACHINE_STACK_END(&th->ec->machine.stack_end);
 #ifdef __ia64
-    th->machine.register_stack_end = rb_ia64_bsp();
+    th->ec->machine.register_stack_end = rb_ia64_bsp();
 #endif
 
     if (th->ec->machine.stack_start > th->ec->machine.stack_end) {
@@ -499,8 +499,8 @@ cont_save_machine_stack(rb_thread_t *th, rb_context_t *cont)
 
 #ifdef __ia64
     rb_ia64_flushrs();
-    size = cont->machine.register_stack_size = th->machine.register_stack_end - th->machine.register_stack_start;
-    cont->machine.register_stack_src = th->machine.register_stack_start;
+    size = cont->machine.register_stack_size = th->ec->machine.register_stack_end - th->ec->machine.register_stack_start;
+    cont->machine.register_stack_src = th->ec->machine.register_stack_start;
     if (cont->machine.register_stack) {
 	REALLOC_N(cont->machine.register_stack, VALUE, size);
     }