xnu-1504.9.37.tar.gz

[apple/xnu.git] / osfmk / ipc / ipc_kmsg.h

diff --git a/osfmk/ipc/ipc_kmsg.h b/osfmk/ipc/ipc_kmsg.h
index db7e6acf49cb22331581f618e6ae0f16f7064151..8687cafbfb115f2cc88fa0822d289f2ff4eca82c 100644 (file)
--- a/osfmk/ipc/ipc_kmsg.h
+++ b/osfmk/ipc/ipc_kmsg.h
@@ -104,6 +104,11 @@ struct ipc_kmsg {
        mach_msg_header_t *ikm_header;
 };
 
+#if defined(__i386__) || defined(__arm__)
+#define        IKM_SUPPORT_LEGACY      1
+#else
+#define        IKM_SUPPORT_LEGACY      0
+#endif
 
 #define        IKM_OVERHEAD            (sizeof(struct ipc_kmsg))
 
@@ -157,6 +162,12 @@ MACRO_BEGIN                                                                \
        assert((kmsg)->ikm_next == IKM_BOGUS);                          \
 MACRO_END
 
+#define ikm_set_header(kmsg, mtsize)                                   \
+MACRO_BEGIN                                                            \
+       (kmsg)->ikm_header = (mach_msg_header_t *)                      \
+       ((vm_offset_t)((kmsg) + 1) + (kmsg)->ikm_size - (mtsize));      \
+MACRO_END
+
 struct ipc_kmsg_queue {
        struct ipc_kmsg *ikmq_base;
 };
@@ -262,13 +273,16 @@ extern void ipc_kmsg_destroy(
 extern void ipc_kmsg_destroy_dest(
        ipc_kmsg_t      kmsg);
 
-
 /* Preallocate a kernel message buffer */
+extern ipc_kmsg_t ipc_kmsg_prealloc(
+       mach_msg_size_t size);
+
+/* bind a preallocated message buffer to a port */
 extern void ipc_kmsg_set_prealloc(
        ipc_kmsg_t      kmsg,
        ipc_port_t      port);
 
-/* Clear a kernel message buffer */
+/* Clear preallocated message buffer binding */
 extern void ipc_kmsg_clear_prealloc(
        ipc_kmsg_t      kmsg,
        ipc_port_t      port);
@@ -320,6 +334,11 @@ extern mach_msg_return_t ipc_kmsg_copyin(
 extern void ipc_kmsg_copyin_from_kernel(
        ipc_kmsg_t              kmsg);
 
+#if IKM_SUPPORT_LEGACY
+extern void ipc_kmsg_copyin_from_kernel_legacy(
+       ipc_kmsg_t      kmsg);
+#endif
+
 /* Copyout port rights in the header of a message */
 extern mach_msg_return_t ipc_kmsg_copyout_header(
        mach_msg_header_t       *msg,
@@ -371,6 +390,12 @@ extern void ipc_kmsg_copyout_to_kernel(
        ipc_kmsg_t              kmsg,
        ipc_space_t             space);
 
+#if IKM_SUPPORT_LEGACY
+extern void ipc_kmsg_copyout_to_kernel_legacy(
+       ipc_kmsg_t              kmsg,
+       ipc_space_t             space);
+#endif
+
 /* get a scatter list and check consistency */
 extern mach_msg_body_t *ipc_kmsg_get_scatter(
         mach_vm_address_t       msg_addr,