DDB support (much not yet implemented).

3 files changed, 315 insertions, 0 deletions

diff --git a/sys/arch/alpha/alpha/db_disasm.c b/sys/arch/alpha/alpha/db_disasm.c
new file mode 100644
index 00000000000..531ecb397db
--- /dev/null
+++ b/sys/arch/alpha/alpha/db_disasm.c
@@ -0,0 +1,49 @@
+/*	$OpenBSD: db_disasm.c,v 1.1 1997/07/06 16:31:13 niklas Exp $	*/
+
+/*
+ * Copyright (c) 1997 Niklas Hallqvist.  All rights reserverd.
+ *
+ * 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. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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 <sys/types.h>
+#include <sys/systm.h>
+
+#include <machine/db_machdep.h>
+
+#include <ddb/db_interface.h>
+
+vm_offset_t 
+db_disasm(loc, flag)
+	vm_offset_t loc;
+	boolean_t flag;
+{
+	 printf("disassembler not implemented yet\n");
+	 return (0);
+}
diff --git a/sys/arch/alpha/alpha/db_interface.c b/sys/arch/alpha/alpha/db_interface.c
new file mode 100644
index 00000000000..10682ce7a40
--- /dev/null
+++ b/sys/arch/alpha/alpha/db_interface.c
@@ -0,0 +1,216 @@
+/*	$OpenBSD: db_interface.c,v 1.1 1997/07/06 16:31:13 niklas Exp $	*/
+
+/*
+ * Copyright (c) 1997 Niklas Hallqvist.  All rights reserverd.
+ *
+ * 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. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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 <sys/types.h>
+#include <sys/systm.h>
+
+#include <machine/db_machdep.h>
+#include <machine/frame.h>
+
+#include <ddb/db_access.h>
+#include <ddb/db_command.h>
+#include <ddb/db_output.h>
+#include <ddb/db_sym.h>
+#include <ddb/db_variables.h>
+#include <ddb/db_extern.h>
+
+#include <dev/cons.h>
+
+extern label_t	*db_recover;
+
+void kdbprinttrap __P((int, int));
+
+struct db_variable db_regs[] = {
+	{ "v0", (long *)&ddb_regs.tf_regs[FRAME_V0], FCN_NULL, },
+	{ "t0", (long *)&ddb_regs.tf_regs[FRAME_T0], FCN_NULL, },
+	{ "t1", (long *)&ddb_regs.tf_regs[FRAME_T1], FCN_NULL, },
+	{ "t2", (long *)&ddb_regs.tf_regs[FRAME_T2], FCN_NULL, },
+	{ "t3", (long *)&ddb_regs.tf_regs[FRAME_T3], FCN_NULL, },
+	{ "t4", (long *)&ddb_regs.tf_regs[FRAME_T4], FCN_NULL, },
+	{ "t5", (long *)&ddb_regs.tf_regs[FRAME_T5], FCN_NULL, },
+	{ "t6", (long *)&ddb_regs.tf_regs[FRAME_T6], FCN_NULL, },
+	{ "t7", (long *)&ddb_regs.tf_regs[FRAME_T7], FCN_NULL, },
+	{ "s0", (long *)&ddb_regs.tf_regs[FRAME_S0], FCN_NULL, },
+	{ "s1", (long *)&ddb_regs.tf_regs[FRAME_S1], FCN_NULL, },
+	{ "s2", (long *)&ddb_regs.tf_regs[FRAME_S2], FCN_NULL, },
+	{ "s3", (long *)&ddb_regs.tf_regs[FRAME_S3], FCN_NULL, },
+	{ "s4", (long *)&ddb_regs.tf_regs[FRAME_S4], FCN_NULL, },
+	{ "s5", (long *)&ddb_regs.tf_regs[FRAME_S5], FCN_NULL, },
+	{ "s6", (long *)&ddb_regs.tf_regs[FRAME_S6], FCN_NULL, },
+	{ "a3", (long *)&ddb_regs.tf_regs[FRAME_A3], FCN_NULL, },
+	{ "a4", (long *)&ddb_regs.tf_regs[FRAME_A4], FCN_NULL, },
+	{ "a5", (long *)&ddb_regs.tf_regs[FRAME_A5], FCN_NULL, },
+	{ "t8", (long *)&ddb_regs.tf_regs[FRAME_T8], FCN_NULL, },
+	{ "t9", (long *)&ddb_regs.tf_regs[FRAME_T9], FCN_NULL, },
+	{ "t10", (long *)&ddb_regs.tf_regs[FRAME_T10], FCN_NULL, },
+	{ "t11", (long *)&ddb_regs.tf_regs[FRAME_T11], FCN_NULL, },
+	{ "ra", (long *)&ddb_regs.tf_regs[FRAME_RA], FCN_NULL, },
+	{ "t12", (long *)&ddb_regs.tf_regs[FRAME_T12], FCN_NULL, },
+	{ "at", (long *)&ddb_regs.tf_regs[FRAME_AT], FCN_NULL, },
+	{ "sp", (long *)&ddb_regs.tf_regs[FRAME_SP], FCN_NULL, },
+	{ "ps", (long *)&ddb_regs.tf_regs[FRAME_PS], FCN_NULL, },
+	{ "pc", (long *)&ddb_regs.tf_regs[FRAME_PC], FCN_NULL, },
+	{ "gp", (long *)&ddb_regs.tf_regs[FRAME_GP], FCN_NULL, },
+	{ "a0", (long *)&ddb_regs.tf_regs[FRAME_A0], FCN_NULL, },
+	{ "a1", (long *)&ddb_regs.tf_regs[FRAME_A1], FCN_NULL, },
+	{ "a2", (long *)&ddb_regs.tf_regs[FRAME_A2], FCN_NULL, },
+};
+
+struct db_variable *db_eregs = db_regs + sizeof(db_regs)/sizeof(db_regs[0]);
+int	db_active = 0;
+
+void
+Debugger()
+{
+  	__asm__ ("bpt");
+}
+
+/*
+ * Read bytes from kernel address space for debugger.
+ */
+void
+db_read_bytes(addr, size, data)
+	vm_offset_t addr;
+	size_t size;
+	char *data;
+{
+	char *src = (char*)addr;
+
+	while (size > 0) {
+		--size;
+		*data++ = *src++;
+	}
+}
+
+/*
+ * Write bytes to kernel address space for debugger.
+ */
+void
+db_write_bytes(addr, size, data)
+	vm_offset_t addr;
+	size_t size;
+	char *data;
+{
+	char *dst = (char *)addr;
+
+	while (size > 0) {
+		--size;
+		*dst++ = *data++;
+	}
+}
+
+/*
+ * Print trap reason.
+ */
+void
+kdbprinttrap(type, code)
+	int type, code;
+{
+	db_printf("kernel: ");
+#if 0
+	if (type >= trap_types || type < 0)
+#endif
+		db_printf("type %d", type);
+#if 0
+	else
+		db_printf("%s", trap_type[type]);
+#endif
+	db_printf(" trap, code=%x\n", code);
+}
+
+/*
+ *  kdb_trap - field a TRACE or BPT trap
+ */
+int
+kdb_trap(type, code, regs)
+	int type, code;
+	db_regs_t *regs;
+{
+	int s;
+
+	switch (type) {
+	case ALPHA_IF_CODE_BPT:		/* breakpoint */
+	case -1:			/* keyboard interrupt */
+		break;
+	default:
+		kdbprinttrap(type, code);
+		if (db_recover != 0) {
+			db_error("Faulted in DDB; continuing...\n");
+			/*NOTREACHED*/
+		}
+	}
+
+	/* XXX Should switch to kdb`s own stack here. */
+
+#if 0 /* XXX leave this until later */
+	ddb_regs = *regs;
+	if (KERNELMODE(regs->tf_cs, regs->tf_eflags)) {
+		/*
+		 * Kernel mode - esp and ss not saved
+		 */
+		ddb_regs.tf_esp = (int)&regs->tf_esp;	/* kernel stack pointer */
+		asm("movw %%ss,%w0" : "=r" (ddb_regs.tf_ss));
+	}
+#endif
+
+	s = splhigh();
+	db_active++;
+	cnpollc(TRUE);
+	db_trap(type, code);
+	cnpollc(FALSE);
+	db_active--;
+	splx(s);
+
+#if 0 /* XXX save until later... */
+	regs->tf_es     = ddb_regs.tf_es;
+	regs->tf_ds     = ddb_regs.tf_ds;
+	regs->tf_edi    = ddb_regs.tf_edi;
+	regs->tf_esi    = ddb_regs.tf_esi;
+	regs->tf_ebp    = ddb_regs.tf_ebp;
+	regs->tf_ebx    = ddb_regs.tf_ebx;
+	regs->tf_edx    = ddb_regs.tf_edx;
+	regs->tf_ecx    = ddb_regs.tf_ecx;
+	regs->tf_eax    = ddb_regs.tf_eax;
+	regs->tf_eip    = ddb_regs.tf_eip;
+	regs->tf_cs     = ddb_regs.tf_cs;
+	regs->tf_eflags = ddb_regs.tf_eflags;
+	if (!KERNELMODE(regs->tf_cs, regs->tf_eflags)) {
+		/* ring transit - saved esp and ss valid */
+		regs->tf_esp    = ddb_regs.tf_esp;
+		regs->tf_ss     = ddb_regs.tf_ss;
+	}
+#endif
+
+	return (1);
+}
diff --git a/sys/arch/alpha/alpha/db_trace.c b/sys/arch/alpha/alpha/db_trace.c
new file mode 100644
index 00000000000..86996a3cc71
--- /dev/null
+++ b/sys/arch/alpha/alpha/db_trace.c
@@ -0,0 +1,50 @@
+/*	$OpenBSD: db_trace.c,v 1.1 1997/07/06 16:31:14 niklas Exp $	*/
+
+/*
+ * Copyright (c) 1997 Niklas Hallqvist.  All rights reserverd.
+ *
+ * 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. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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 <sys/types.h>
+#include <sys/systm.h>
+
+#include <machine/db_machdep.h>
+
+#include <ddb/db_interface.h>
+
+void
+db_stack_trace_cmd(addr, have_addr, count, modif)
+	db_expr_t       addr;
+	int             have_addr;
+	db_expr_t       count;
+	char            *modif;
+{
+	printf("trace not implemented yet\n");
+}