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From: Marcel Moolenaar <marcel@FreeBSD.org>
Subject: PERFORCE change 10391 for review
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http://people.freebsd.org/~peter/p4db/chv.cgi?CH=10391

Change 10391 by marcel@marcel_vaio on 2002/04/27 22:51:29

	Draft implementation of ptrace_set_pc and ptrace_single_step.

Affected files ...

... //depot/projects/ia64/sys/ia64/ia64/machdep.c#30 edit

Differences ...

==== //depot/projects/ia64/sys/ia64/ia64/machdep.c#30 (text+ko) ====

@@ -1125,15 +1125,33 @@
 int
 ptrace_set_pc(struct thread *td, unsigned long addr)
 {
-	/* TODO set pc in trapframe */
-	return 0;
+	uint64_t slot;
+
+	switch (addr & 0xFUL) {
+	case 0:
+		slot = IA64_PSR_RI_0;
+		break;
+	case 1:
+		/* XXX we need to deal with MLX bundles here */
+		slot = IA64_PSR_RI_1;
+		break;
+	case 2:
+		slot = IA64_PSR_RI_2;
+		break;
+	default:
+		return (EINVAL);
+	}
+
+	td->td_frame->tf_cr_iip = addr & ~0x0FULL;
+	td->td_frame->tf_cr_ipsr = (tf_cr_ipsr & ~IA64_PSR_RI) | slot;
+	return (0);
 }
 
 int
 ptrace_single_step(struct thread *td)
 {
-	/* TODO arrange for user process to single step */
-	return 0;
+	td->td_frame->tf_cr_ipsr |= IA64_PSR_SS;
+	return (0);
 }
 
 int

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