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From: Marcel Moolenaar <marcel@FreeBSD.org>
To: Perforce Change Reviews <perforce@freebsd.org>
Subject: PERFORCE change 32092 for review
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http://perforce.freebsd.org/chv.cgi?CH=32092

Change 32092 by marcel@marcel_nfs on 2003/05/29 21:31:15

	Rough (ie untested) implementation of get_mcontext() and
	set_mcontext(). The clear_ret parameter is ignored because
	return registers are scratch registers and they are not
	saved in the context.

Affected files ...

.. //depot/projects/ia64/sys/ia64/ia64/machdep.c#74 edit
.. //depot/projects/ia64/sys/ia64/include/_regset.h#5 edit

Differences ...

==== //depot/projects/ia64/sys/ia64/ia64/machdep.c#74 (text+ko) ====

@@ -1011,17 +1011,27 @@
 #endif
 
 int
-get_mcontext(struct thread *td, mcontext_t *mcp, int clear_ret)
+get_mcontext(struct thread *td, mcontext_t *mc, int clear_ret)
 {
+	struct trapframe *tf;
 
-	return (ENOSYS);
+	tf = td->td_frame;
+	mc->mc_special = tf->tf_special;
+	save_callee_saved(&mc->mc_preserved);
+	save_callee_saved_fp(&mc->mc_preserved_fp);
+	return (0);
 }
 
 int
-set_mcontext(struct thread *td, const mcontext_t *mcp)
+set_mcontext(struct thread *td, const mcontext_t *mc)
 {
+	struct trapframe *tf;
 
-	return (ENOSYS);
+	tf = td->td_frame;
+	tf->tf_special = mc->mc_special;
+	restore_callee_saved(&mc->mc_preserved);
+	restore_callee_saved_fp(&mc->mc_preserved_fp);
+	return (0);
 }
 
 /*

==== //depot/projects/ia64/sys/ia64/include/_regset.h#5 (text+ko) ====

@@ -169,9 +169,9 @@
 };
 
 #ifdef _KERNEL
-void	restore_callee_saved(struct _callee_saved *);
-void	restore_callee_saved_fp(struct _callee_saved_fp *);
-void	restore_high_fp(struct _high_fp *);
+void	restore_callee_saved(const struct _callee_saved *);
+void	restore_callee_saved_fp(const struct _callee_saved_fp *);
+void	restore_high_fp(const struct _high_fp *);
 void	save_callee_saved(struct _callee_saved *);
 void	save_callee_saved_fp(struct _callee_saved_fp *);
 void	save_high_fp(struct _high_fp *);