diff --git a/stand/userboot/userboot/bootinfo.c b/stand/userboot/userboot/bootinfo.c
--- a/stand/userboot/userboot/bootinfo.c
+++ b/stand/userboot/userboot/bootinfo.c
@@ -96,18 +96,18 @@
     
     /* traverse the environment */
     for (ep = environ; ep != NULL; ep = ep->ev_next) {
-        CALLBACK(copyin, ep->ev_name, addr, strlen(ep->ev_name));
+        archsw.arch_copyin(ep->ev_name, addr, strlen(ep->ev_name));
 	addr += strlen(ep->ev_name);
-	CALLBACK(copyin, "=", addr, 1);
+	archsw.arch_copyin("=", addr, 1);
 	addr++;
 	if (ep->ev_value != NULL) {
-            CALLBACK(copyin, ep->ev_value, addr, strlen(ep->ev_value));
+            archsw.arch_copyin(ep->ev_value, addr, strlen(ep->ev_value));
 	    addr += strlen(ep->ev_value);
 	}
-	CALLBACK(copyin, "", addr, 1);
+	archsw.arch_copyin("", addr, 1);
 	addr++;
     }
-    CALLBACK(copyin, "", addr, 1);
+    archsw.arch_copyin("", addr, 1);
     addr++;
     return(addr);
 }
diff --git a/stand/userboot/userboot/bootinfo32.c b/stand/userboot/userboot/bootinfo32.c
--- a/stand/userboot/userboot/bootinfo32.c
+++ b/stand/userboot/userboot/bootinfo32.c
@@ -61,7 +61,7 @@
 #define COPY32(v, a, c) {			\
     uint32_t	x = (v);			\
     if (c)					\
-        CALLBACK(copyin, &x, a, sizeof(x));	\
+        archsw.arch_copyin(&x, a, sizeof(x));	\
     a += sizeof(x);				\
 }
 
@@ -69,7 +69,7 @@
     COPY32(t, a, c);				\
     COPY32(strlen(s) + 1, a, c);		\
     if (c)					\
-        CALLBACK(copyin, s, a, strlen(s) + 1);  \
+        archsw.arch_copyin(s, a, strlen(s) + 1);\
     a += roundup(strlen(s) + 1, sizeof(uint32_t));\
 }
 
@@ -81,7 +81,7 @@
     COPY32(t, a, c);				\
     COPY32(sizeof(s), a, c);			\
     if (c)					\
-        CALLBACK(copyin, &s, a, sizeof(s));	\
+        archsw.arch_copyin(&s, a, sizeof(s));	\
     a += roundup(sizeof(s), sizeof(uint32_t));	\
 }
 
@@ -92,7 +92,7 @@
     COPY32(MODINFO_METADATA | mm->md_type, a, c); \
     COPY32(mm->md_size, a, c);			\
     if (c)					\
-        CALLBACK(copyin, mm->md_data, a, mm->md_size);    \
+        archsw.arch_copyin(mm->md_data, a, mm->md_size);\
     a += roundup(mm->md_size, sizeof(uint32_t));\
 }
 
diff --git a/stand/userboot/userboot/bootinfo64.c b/stand/userboot/userboot/bootinfo64.c
--- a/stand/userboot/userboot/bootinfo64.c
+++ b/stand/userboot/userboot/bootinfo64.c
@@ -58,7 +58,7 @@
 #define COPY32(v, a, c) {			\
     uint32_t	x = (v);			\
     if (c)					\
-        CALLBACK(copyin, &x, a, sizeof(x));	\
+        archsw.arch_copyin(&x, a, sizeof(x));	\
     a += sizeof(x);				\
 }
 
@@ -66,7 +66,7 @@
     COPY32(t, a, c);				\
     COPY32(strlen(s) + 1, a, c);		\
     if (c)					\
-        CALLBACK(copyin, s, a, strlen(s) + 1);  \
+        archsw.arch_copyin(s, a, strlen(s) + 1);\
     a += roundup(strlen(s) + 1, sizeof(uint64_t));\
 }
 
@@ -78,7 +78,7 @@
     COPY32(t, a, c);				\
     COPY32(sizeof(s), a, c);			\
     if (c)					\
-        CALLBACK(copyin, &s, a, sizeof(s));	\
+        archsw.arch_copyin(&s, a, sizeof(s));	\
     a += roundup(sizeof(s), sizeof(uint64_t));	\
 }
 
@@ -89,7 +89,7 @@
     COPY32(MODINFO_METADATA | mm->md_type, a, c); \
     COPY32(mm->md_size, a, c);			\
     if (c)					\
-        CALLBACK(copyin, mm->md_data, a, mm->md_size);    \
+        archsw.arch_copyin(mm->md_data, a, mm->md_size);\
     a += roundup(mm->md_size, sizeof(uint64_t));\
 }