Index: uspace/lib/libc/arch/sparc64/Makefile.inc
===================================================================
--- uspace/lib/libc/arch/sparc64/Makefile.inc	(revision 3c4762c5ccc82604a8e08a3fd77489fd28ec2565)
+++ uspace/lib/libc/arch/sparc64/Makefile.inc	(revision e84037f47f9b0d63229d937ebc01279fa0fe7708)
@@ -34,5 +34,6 @@
 
 ARCH_SOURCES += arch/$(UARCH)/src/fibril.S \
-	arch/$(UARCH)/src/tls.c
+	arch/$(UARCH)/src/tls.c \
+	arch/$(UARCH)/src/stacktrace.S
 
 GCC_CFLAGS += -mcpu=ultrasparc -m64
Index: uspace/lib/libc/arch/sparc64/src/stacktrace.S
===================================================================
--- uspace/lib/libc/arch/sparc64/src/stacktrace.S	(revision e84037f47f9b0d63229d937ebc01279fa0fe7708)
+++ uspace/lib/libc/arch/sparc64/src/stacktrace.S	(revision e84037f47f9b0d63229d937ebc01279fa0fe7708)
@@ -0,0 +1,64 @@
+#
+# 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:
+	# Add the stack bias to %sp to get the actual address.
+	retl
+	add %sp, 0x7ff, %o0
+
+frame_pointer_prev:
+	save %sp, -176, %sp
+	# Flush all other windows to memory so that we can read their contents.
+	flushw
+	# Read the %fp from the window save area.
+	ldx [%i0 + 14 * 8], %i0
+	# Add the stack bias to the %fp read from the window save area.
+	add %i0, 0x7ff, %i0
+	ret
+	restore
+
+frame_pointer_validate:
+	# Just return the frame address.
+	retl
+	nop
+
+return_address_get:
+	save %sp, -176, %sp
+	# Flush all other windows to memory so that we can read their contents.
+	flushw
+	# Read the %i7 from the window save area.
+	ldx [%i0 + 15 * 8], %i0
+	ret
+	restore