diff --git a/sandbox/base/main.c b/sandbox/base/main.c
index 955c6f9..795e768 100644
--- a/sandbox/base/main.c
+++ b/sandbox/base/main.c
@@ -50,7 +50,7 @@ int main(int argc, const char **argv)
 	memblock_reserve(0x30000, 0x40000);
 	memblock_reserve(0x100000, 0x10000);
 
-	phys_addr_t alloc = memblock_alloc(512);
+	phys_addr_t alloc = memblock_alloc_phys(512);
 	printf("allocated 512 bytes at 0x%" PRIxPTR "\n", alloc);
 
 	printf("memory regions:\n");
diff --git a/sandbox/memblock/include/socks/memblock.h b/sandbox/memblock/include/socks/memblock.h
index dd18129..f5856d0 100644
--- a/sandbox/memblock/include/socks/memblock.h
+++ b/sandbox/memblock/include/socks/memblock.h
@@ -80,8 +80,11 @@ extern int memblock_init(uintptr_t alloc_start, uintptr_t alloc_end, uintptr_t v
 extern int memblock_add(phys_addr_t base, size_t size);
 extern int memblock_reserve(phys_addr_t base, size_t size);
 
-extern phys_addr_t memblock_alloc(size_t size);
-extern int memblock_free(phys_addr_t addr, size_t size);
+extern void *memblock_alloc(size_t size);
+extern phys_addr_t memblock_alloc_phys(size_t size);
+
+extern int memblock_free(void *addr, size_t size);
+extern int memblock_free_phys(phys_addr_t addr, size_t size);
 
 extern void __next_memory_region(memblock_iter_t *it, \
 		memblock_type_t *type_a, memblock_type_t *type_b,
diff --git a/sandbox/memblock/memblock.c b/sandbox/memblock/memblock.c
index d832333..fd94698 100644
--- a/sandbox/memblock/memblock.c
+++ b/sandbox/memblock/memblock.c
@@ -236,7 +236,16 @@ static phys_addr_t do_alloc(size_t size)
 	return allocated_base;
 }
 
-phys_addr_t memblock_alloc(size_t size)
+void *memblock_alloc(size_t size)
+{
+	if (memblock.reserved.count >= memblock.reserved.max - 2) {
+		memblock_double_capacity(&memblock.reserved);
+	}
+
+	return (void *)(do_alloc(size) + memblock.m_voffset);
+}
+
+phys_addr_t memblock_alloc_phys(size_t size)
 {
 	if (memblock.reserved.count >= memblock.reserved.max - 2) {
 		memblock_double_capacity(&memblock.reserved);
@@ -245,7 +254,12 @@ phys_addr_t memblock_alloc(size_t size)
 	return do_alloc(size);
 }
 
-int memblock_free(phys_addr_t addr, size_t size)
+int memblock_free(void *p, size_t size)
+{
+	return 0;
+}
+
+int memblock_free_phys(phys_addr_t addr, size_t size)
 {
 	return 0;
 }