diff --git a/photon/libc/sys/magenta/heap.c b/photon/libc/sys/magenta/heap.c
index 2b91a29..7c421d5 100644
--- a/photon/libc/sys/magenta/heap.c
+++ b/photon/libc/sys/magenta/heap.c
@@ -1,9 +1,9 @@
 #include <stdint.h>
 #include <stddef.h>
 #include <string.h>
-#include <sys/handles.h>
 #include <magenta/vmo.h>
 #include <magenta/limits.h>
+#include <magenta/misc.h>
 #include <magenta/vmar.h>
 
 #define ROUND_UP(x, b) x += (b) - ((x) % (b))
@@ -22,7 +22,7 @@ void __crt_heap_init(size_t heap_sz)
             &heap_vmo);
 
     mx_vaddr_t heap = 0;
-    mx_vmar_map(m_get_handle(M_HND_VMAR_ROOT),
+    mx_vmar_map(mx_get_startup_handle(MX_B_VMAR_ROOT),
             MX_VM_PERM_READ | MX_VM_PERM_WRITE,
             0, heap_vmo, 0, heap_sz,
             &heap);
@@ -47,10 +47,10 @@ void *__crt_heap_extend(size_t sz)
     mx_vmo_set_size(heap_vmo, heap_sz + sz);
 
     mx_vaddr_t vmar_base, alloc_base;
-    mx_vmar_bounds(m_get_handle(M_HND_VMAR_ROOT), &vmar_base, NULL);
+    mx_vmar_bounds(mx_get_startup_handle(MX_B_VMAR_ROOT), &vmar_base, NULL);
     mx_vaddr_t offset = heap_end - vmar_base;
 
-    mx_vmar_map(m_get_handle(M_HND_VMAR_ROOT),
+    mx_vmar_map(mx_get_startup_handle(MX_B_VMAR_ROOT),
             MX_VM_PERM_READ | MX_VM_PERM_WRITE | MX_VM_SPECIFIC,
             offset, heap_vmo, heap_sz, sz, &alloc_base);
     heap_sz += sz;
diff --git a/photon/libc/sys/magenta/init.c b/photon/libc/sys/magenta/init.c
index 6038af5..acf3a88 100644
--- a/photon/libc/sys/magenta/init.c
+++ b/photon/libc/sys/magenta/init.c
@@ -4,24 +4,10 @@
 #include <magenta/errors.h>
 #include <magenta/misc.h>
 #include <stdio.h>
-#include "sys/handles.h"
 #include "__init.h"
 #include "__heap.h"
 #include "__fio.h"
 
-struct handles {
-    mx_handle_t task_self;
-    mx_handle_t task_vmar;
-    mx_handle_t exec_vmar;
-    mx_handle_t stack_vmo;
-    mx_handle_t vdso_vmo;
-    mx_handle_t exec_vmo;
-    mx_handle_t ldsvc;
-    mx_handle_t bootstrap;
-};
-
-static struct handles rt_handles;
-
 static const char **environ = NULL;
 
 const char **__crt_environ()
@@ -34,7 +20,7 @@ extern void __crt_run_atexit();
 
 static void parse_args(
         mx_bootstrap_msg_t *args, mx_handle_t *handles,
-        const char **argv, const char **envp, int hndc, struct handles *out)
+        const char **argv, const char **envp, int hndc, mx_bootstrap_handle_t *handles_out)
 {
     if (args->args_num > 0) {
         char *arg_buf = (char *)args + args->args_off;
@@ -73,36 +59,8 @@ static void parse_args(
     uint32_t *hent = (uint32_t *)((char *)args + args->handle_info_off);
 
     for (int i = 0; i < hndc; i++) {
-        switch (MX_B_HND_TYPE(hent[i])) {
-        case MX_B_TASK_SELF:
-            out->task_self = handles[i];
-            break;
-        case MX_B_VMO_VDSO:
-            out->vdso_vmo = handles[i];
-            break;
-        case MX_B_VMO_STACK:
-            out->stack_vmo = handles[i];
-            break;
-        case MX_B_VMAR_ROOT:
-            out->task_vmar = handles[i];
-            break;
-        case MX_B_VMAR_EXEC:
-            out->exec_vmar = handles[i];
-            break;
-        case MX_B_VMO_EXECUTABLE:
-            out->exec_vmo = handles[i];
-            break;
-        case MX_B_TUNNEL_LDSVC:
-            out->ldsvc = handles[i];
-            break;
-#if 0
-        case MX_B_VMO_BOOTDATA:
-            out->bootfs_vmo = handles[i];
-            break;
-#endif
-        default:
-            break;
-        }
+        handles_out[i].info = hent[i];
+        handles_out[i].handle = handles[i];
     }
 }
 
@@ -134,42 +92,23 @@ int __crt_init(mx_handle_t bootstrap)
 
     const char *argv[msg->args_num + 1];
     const char *envp[msg->environ_num + 1];
+    mx_bootstrap_handle_t start_handles[nr_handles + 1];
+    start_handles[nr_handles].handle = bootstrap;
+    start_handles[nr_handles].info = MX_B_HND(MX_B_TUNNEL_BTSTP, 0);
+
     argv[msg->args_num] = NULL;
     envp[msg->environ_num] = NULL;
     environ = envp;
 
-    parse_args(msg, handles, argv, envp, nr_handles, &rt_handles);
-    rt_handles.bootstrap = bootstrap;
+    parse_args(msg, handles, argv, envp, nr_handles, start_handles);
+    mx_init_startup_handles(start_handles, nr_handles + 1);
 
     int ret = main(msg->args_num, argv);
 
     __crt_run_atexit();
-    mx_task_kill(rt_handles.task_self, ret);
+    mx_task_kill(mx_get_startup_handle(MX_B_TASK_SELF), ret);
 
     /* unreachable */
     hang();
     return 0;
 }
-
-mx_handle_t m_get_handle(unsigned int type)
-{
-    switch (type) {
-    case M_HND_VMAR_ROOT:
-        return rt_handles.task_vmar;
-    case M_HND_VMAR_EXEC:
-        return rt_handles.exec_vmar;
-    case M_HND_VMO_EXEC:
-        return rt_handles.exec_vmo;
-    case M_HND_VMO_VDSO:
-        return rt_handles.vdso_vmo;
-    case M_HND_TASK_SELF:
-        return rt_handles.task_self;
-    case M_HND_TNL_LDSVC:
-        return rt_handles.ldsvc;
-    case M_HND_TNL_BTSTP:
-        return rt_handles.bootstrap;
-    default:
-        return MX_NULL_HANDLE;
-    }
-}
-
diff --git a/photon/libc/sys/magenta/sys/handles.h b/photon/libc/sys/magenta/sys/handles.h
deleted file mode 100644
index c9fc248..0000000
--- a/photon/libc/sys/magenta/sys/handles.h
+++ /dev/null
@@ -1,16 +0,0 @@
-#ifndef SYS_MAGENTA_SYS_HANDLES_H_
-#define SYS_MAGENTA_SYS_HANDLES_H_
-
-#include <magenta/types.h>
-
-#define M_HND_VMAR_ROOT 0x01u
-#define M_HND_VMAR_EXEC 0x02u
-#define M_HND_VMO_EXEC  0x03u
-#define M_HND_VMO_VDSO  0x04u
-#define M_HND_TNL_LDSVC 0x05u
-#define M_HND_TNL_BTSTP 0x06u
-#define M_HND_TASK_SELF 0x07u
-
-extern mx_handle_t m_get_handle(unsigned int type);
-
-#endif