Index: uspace/lib/libc/arch/ia32/Makefile.inc
===================================================================
--- uspace/lib/libc/arch/ia32/Makefile.inc	(revision e15e0e8bcc3e3f28628a17ecc49ae0d7e5c356f8)
+++ uspace/lib/libc/arch/ia32/Makefile.inc	(revision a6aef4ec08be4da90c69dae74486783e39baae87)
@@ -37,5 +37,6 @@
 	arch/$(UARCH)/src/fibril.S \
 	arch/$(UARCH)/src/tls.c \
-	arch/$(UARCH)/src/setjmp.S
+	arch/$(UARCH)/src/setjmp.S \
+	arch/$(UARCH)/src/stacktrace.S
 
 GCC_CFLAGS += -march=pentium
Index: uspace/lib/libc/arch/ia32/src/stacktrace.S
===================================================================
--- uspace/lib/libc/arch/ia32/src/stacktrace.S	(revision a6aef4ec08be4da90c69dae74486783e39baae87)
+++ uspace/lib/libc/arch/ia32/src/stacktrace.S	(revision a6aef4ec08be4da90c69dae74486783e39baae87)
@@ -0,0 +1,52 @@
+#
+# Copyright (c) 2009 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 frame_pointer_prev
+.global frame_pointer_validate
+.global return_address_get
+
+frame_pointer_get:
+	movl %ebp, %eax
+	ret
+
+frame_pointer_prev:
+	movl 4(%esp), %eax
+	movl (%eax), %eax
+	ret
+
+frame_pointer_validate:
+	movl 4(%esp), %eax
+	ret
+
+return_address_get:
+	movl 4(%esp), %eax
+	movl 4(%eax), %eax
+	ret