Index: kernel/arch/ia32/Makefile.inc
===================================================================
--- kernel/arch/ia32/Makefile.inc	(revision bac86377e1dbd799c062af0852acec649a1d3339)
+++ kernel/arch/ia32/Makefile.inc	(revision 4290746d0d9d00ae0fb0bb46596397975584d04f)
@@ -78,4 +78,6 @@
 	arch/$(KARCH)/src/context.S \
 	arch/$(KARCH)/src/debug/panic.s \
+	arch/$(KARCH)/src/debug/stacktrace.c \
+	arch/$(KARCH)/src/debug/stacktrace_asm.S \
 	arch/$(KARCH)/src/delay.s \
 	arch/$(KARCH)/src/asm.S \
Index: kernel/arch/ia32/src/debug/stacktrace.c
===================================================================
--- kernel/arch/ia32/src/debug/stacktrace.c	(revision 4290746d0d9d00ae0fb0bb46596397975584d04f)
+++ kernel/arch/ia32/src/debug/stacktrace.c	(revision 4290746d0d9d00ae0fb0bb46596397975584d04f)
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2010 Jakub Jermar
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - 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.
+ * - 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 BY THE AUTHOR ``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.
+ */
+
+/** @addtogroup ia32
+ * @{
+ */
+/** @file
+ */
+
+#include <stacktrace.h>
+#include <syscall/copy.h>
+#include <arch/types.h>
+#include <typedefs.h>
+
+#define FRAME_OFFSET_FP_PREV	0
+#define FRAME_OFFSET_RA		1
+
+bool kernel_frame_pointer_validate(uintptr_t fp)
+{
+	return fp != 0;
+}
+
+bool kernel_frame_pointer_prev(uintptr_t fp, uintptr_t *prev)
+{
+	uint32_t *stack = (void *) fp;
+	*prev = stack[FRAME_OFFSET_FP_PREV];
+	return true;
+}
+
+bool kernel_return_address_get(uintptr_t fp, uintptr_t *ra)
+{
+	uint32_t *stack = (void *) fp;
+	*ra = stack[FRAME_OFFSET_RA];
+	return true;
+}
+
+bool uspace_frame_pointer_validate(uintptr_t fp)
+{
+	return fp != 0;
+}
+
+bool uspace_frame_pointer_prev(uintptr_t fp, uintptr_t *prev)
+{
+	return !copy_from_uspace((void *) prev,
+	    (uint32_t *) fp + FRAME_OFFSET_FP_PREV, sizeof(*prev));
+}
+
+bool uspace_return_address_get(uintptr_t fp, uintptr_t *ra)
+{
+	return !copy_from_uspace((void *) ra, (uint32_t *) fp + FRAME_OFFSET_RA,
+	    sizeof(*ra));
+}
+
+/** @}
+ */
Index: kernel/arch/ia32/src/debug/stacktrace_asm.S
===================================================================
--- kernel/arch/ia32/src/debug/stacktrace_asm.S	(revision 4290746d0d9d00ae0fb0bb46596397975584d04f)
+++ kernel/arch/ia32/src/debug/stacktrace_asm.S	(revision 4290746d0d9d00ae0fb0bb46596397975584d04f)
@@ -0,0 +1,40 @@
+#
+# Copyright (c) 2010 Jakub Jermar
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# - Redistributions of source code must retain the above copyright
+#   notice, this list of conditions and the following disclaimer.
+# - 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.
+# - 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 BY THE AUTHOR ``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.
+#
+
+.text
+
+.global frame_pointer_get
+.global program_counter_get
+
+frame_pointer_get:
+	movl %ebp, %eax
+	ret
+
+program_counter_get:
+	mov (%esp), %eax
+	ret