PERFORCE change 56564 for review

[Marcel Moolenaar]

http://perforce.freebsd.org/chv.cgi?CH=56564

Change 56564 by marcel at marcel_nfs on 2004/07/06 01:36:46

	Implement makectx() on sparc64. Tested and working.
	
	This is a rather minimal implementation, but I guess it's enough.
	Note that backtraces are weird on sparc64. It's not showing the
	innermost frame...

Affected files ...

.. //depot/projects/gdb/sys/sparc64/sparc64/machdep.c#7 edit

Differences ...

==== //depot/projects/gdb/sys/sparc64/sparc64/machdep.c#7 (text+ko) ====

@@ -567,6 +567,21 @@
 }
 #endif
 
+/*
+ * Construct a PCB from a trapframe. This is called from kdb_trap() where
+ * we want to start a backtrace from the function that caused us to enter
+ * the debugger. We have the context in the trapframe, but base the trace
+ * on the PCB. The PCB doesn't have to be perfect, as long as it contains
+ * enough for a backtrace.
+ */
+void
+makectx(struct trapframe *tf, struct pcb *pcb)
+{
+
+	pcb->pcb_pc = tf->tf_tpc;
+	pcb->pcb_sp = tf->tf_sp;
+}
+
 int
 get_mcontext(struct thread *td, mcontext_t *mc, int flags)
 {