From c01da18e221dfb38dd482a84d3f2a4a90e401cc1 Mon Sep 17 00:00:00 2001 From: Marcel Moolenaar Date: Sat, 31 May 2003 21:07:08 +0000 Subject: [PATCH] Implement set_mcontext() and get_mcontext(). Just as for sendsig() and sigreturn(), we cheat and assume the preserved registers are still on-chip and unmodified. This is actually the case, but more by accident than by design. We need to use unwinding eventually or explicitly compile the kernel in a way that the compiler steers clear from using the preserved registers completely. --- sys/ia64/ia64/machdep.c | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-) diff --git a/sys/ia64/ia64/machdep.c b/sys/ia64/ia64/machdep.c index 9ff50d47ce9..982f74601e3 100644 --- a/sys/ia64/ia64/machdep.c +++ b/sys/ia64/ia64/machdep.c @@ -1008,17 +1008,27 @@ freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap) #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); } /*