diff --git a/mach/sparc/libdb/.distr b/mach/sparc/libdb/.distr
new file mode 100644
index 000000000..af5eda499
--- /dev/null
+++ b/mach/sparc/libdb/.distr
@@ -0,0 +1 @@
+machdep.s
diff --git a/mach/sparc/libdb/machdep.s b/mach/sparc/libdb/machdep.s
new file mode 100644
index 000000000..35c01c2fe
--- /dev/null
+++ b/mach/sparc/libdb/machdep.s
@@ -0,0 +1,64 @@
+.globl ___Get_PC, ___Set_PC
+
+! $Header$
+
+! This is the machine-dependant part of the ACK debugger support.
+! ___Get_PC takes a frame pointer (local base) argument and returns the
+!	    return address from this frame.
+! ___Set_PC takes a frame pointer (local base) argument plus a return
+!	    address and sets the return address of this frame to the
+!	    return address supplied.
+
+___Get_PC:
+	ld	[%l0],%o0
+	tst	%o0
+	beq	3f
+	nop
+	cmp	%o0,%l1
+	bne	1f
+	nop
+	add	%i7, 8, %o0
+3:
+	retl
+	nop
+1:
+	ta	3
+	add	%l1,%g0,%o1
+2:	add	%o1,7,%o2
+	andn	%o2,7,%o2
+	ld	[%o2+4],%o1
+	cmp	%o0,%o1
+	bne	2b
+	nop
+	ld	[%o2+0x3c],%o0
+	inc	8,%o0
+	retl
+	nop
+
+___Set_PC:
+	ld	[%l0],%o0
+	tst	%o0
+	beq	3f
+	nop
+	cmp	%o0,%l1
+	bne	1f
+	nop
+	ld	[%l0+4],%i7
+	dec	8,%i7
+3:
+	retl
+	nop
+1:
+	ta	3
+	add	%l1,%g0,%o1
+2:	add	%o1,7,%o2
+	andn	%o2,7,%o2
+	ld	[%o2+4],%o1
+	cmp	%o0,%o1
+	bne	2b
+	nop
+	ld	[%l0+4],%o0
+	dec	8,%o0
+	st	%o0,[%o2+0x3c]
+	retl
+	nop