First attempt. Frame digging is tricky since 'jr ra' instructions

used to sync functions start are now (with gcc3) all over the code.
Need to think about some other way to figure out the frame size from
looking for the right sp adjust instruction.

2 files changed, 119 insertions, 0 deletions

diff --git a/usr.bin/pmdb/arch/mips64/mips64.c b/usr.bin/pmdb/arch/mips64/mips64.c
new file mode 100644
index 00000000000..d283eefa4fc
--- /dev/null
+++ b/usr.bin/pmdb/arch/mips64/mips64.c
@@ -0,0 +1,90 @@
+/*      $OpenBSD: mips64.c,v 1.1 2004/11/11 18:47:14 pefo Exp $       */
+/*
+ * Copyright (c) 2002 Dale Rahn <drahn@openbsd.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL  DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+ 
+
+#include <stddef.h>
+#include <string.h>
+#include <sys/param.h>
+#include <sys/ptrace.h>
+#include <machine/reg.h>
+#include <machine/frame.h>
+#include "pmdb.h"
+
+static const char *md_reg_names[] = {
+	"zero", "AT", "v0", "v1", "a0", "a1", "a2", "a3",
+	"a4", "a5", "a6","a7","t0","t1","t2","t3",
+	"s0","s1","s2","s3","s4","s5","s6","s7",
+	"t8","t9","k0","k1","gp","sp","s8","ra",
+	"sr", "mullo", "mulhi", "badvaddr", "cause", "pc"
+};
+
+struct md_def md_def = { md_reg_names, 38, 38};
+
+void
+md_def_init(void)
+{
+	/* no need to do anything */
+}
+
+int
+md_getframe(struct pstate *ps, int frame, struct md_frame *fram)
+{
+	struct reg r;
+	reg fp, pc;
+
+	if (process_getregs(ps, &r))
+		return (-1);
+	fp = r.r_regs[SP];
+	if (frame == 0) {
+		pc = r.r_regs[PC];
+		goto out;
+	}
+	pc = r.r_regs[RA];
+
+	/* XXX Digging out the frames are a little tricky
+         * especially with gcc3 which throws around the code
+         * quite a bit. We don't have a frame pointer and
+	 * and does not know the size of the frame.
+	 * Need to think about a strategy...
+	 */
+	if (frame > 1)
+		return -1;
+out:
+	fram->pc = pc;
+	fram->fp = fp;
+	fram->nargs = 0;
+	return 0;
+}
+
+int
+md_getregs(struct pstate *ps, reg *regs)
+{
+	struct reg md_reg;
+	if (process_getregs(ps, &md_reg))
+		return -1;
+	memcpy(regs, &md_reg, 38 * sizeof(long));
+	return 0;
+}
diff --git a/usr.bin/pmdb/arch/mips64/pmdb_machdep.h b/usr.bin/pmdb/arch/mips64/pmdb_machdep.h
new file mode 100644
index 00000000000..6ecea7c415f
--- /dev/null
+++ b/usr.bin/pmdb/arch/mips64/pmdb_machdep.h
@@ -0,0 +1,29 @@
+/*	$OpenBSD: pmdb_machdep.h,v 1.1 2004/11/11 18:47:14 pefo Exp $	*/
+/*
+ * Copyright (c) 2002 Dale Rahn <drahn@openbsd.org>
+ * All rights reserved. 
+ *
+ * Redistribution and use in source and binary forms, with or without 
+ * modification, are permitted provided that the following conditions 
+ * are met: 
+ *
+ * 1. Redistributions of source code must retain the above copyright 
+ *    notice, this list of conditions and the following disclaimer. 
+ * 2. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL  DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#define BREAKPOINT              { 0x02, 0x02, 0x00, 0x0d }
+#define BREAKPOINT_LEN          4
+#define BREAKPOINT_DECR_PC      0