xnu-4903.270.47.tar.gz

[apple/xnu.git] / bsd / dev / arm64 / cpu_in_cksum.s

diff --git a/bsd/dev/arm64/cpu_in_cksum.s b/bsd/dev/arm64/cpu_in_cksum.s
index b01b27172018c649e55587f2bd6f6e43b847bfb6..86d892aa35bc27a4742ad16ec9fa1d3d7e445ddc 100644 (file)
--- a/bsd/dev/arm64/cpu_in_cksum.s
+++ b/bsd/dev/arm64/cpu_in_cksum.s
@@ -1,12 +1,29 @@
 /*
- * Copyright (c) 2012-2017 Apple Inc. All rights reserved.
+ * Copyright (c) 2012-2018 Apple Inc. All rights reserved.
  *
- * This document is the property of Apple Inc.
- * It is considered confidential and proprietary.
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  *
- * This document may not be reproduced or transmitted in any form,
- * in whole or in part, without the express written permission of
- * Apple Inc.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 
 /* 
@@ -34,9 +51,15 @@
  * routine expects "mbuf-like" argument, and it does not expect the mbuf to be
  * authentic; it only cares about 3 fields.
  */
+#if defined(__LP64__)
 #define        M_NEXT  0
 #define        M_DATA  16      // 8-byte address, would be aligned to 8-byte boundary
 #define        M_LEN   24
+#else
+#define        M_NEXT  0
+#define        M_DATA  8
+#define        M_LEN   12
+#endif
 
        .globl  _os_cpu_in_cksum_mbuf
        .text
@@ -81,6 +104,14 @@ _os_cpu_in_cksum_mbuf:
        #define Wmlen                   w6
        #define t       x7
        #define data    x8
+#if defined(__LP64__)
+       #define ptr_m           x0
+       #define ptr_data        x8
+#else
+       #define ptr_m           w0
+       #define ptr_data        w8
+#endif
+
 
        mov     needs_swap, #0          // needs_swap = FALSE;
        mov     started_on_odd, #0      // started_on_odd = FALSE;
@@ -111,7 +142,7 @@ _os_cpu_in_cksum_mbuf:
        ldr     Wmlen, [m, #M_LEN]      // mlen = m->m_len;
        cmp     mlen, off
        b.le    1f
-       ldr     data, [m, #M_DATA]      // mtod(m, uint8_t *)
+       ldr     ptr_data, [m, #M_DATA]  // mtod(m, uint8_t *)
        sub     mlen, mlen, off         // mlen -= off;
        add     data, data, off         // data = mtod(m, uint8_t *) + off;
        b       L_post_initial_offset
@@ -121,7 +152,7 @@ _os_cpu_in_cksum_mbuf:
        mov     x0, x3
        ret     lr
 2:
-       ldr     m, [m, #M_NEXT]
+       ldr     ptr_m, [m, #M_NEXT]
        b       0b
 
 L_loop:        // for (; len > 0; m = m->m_next) {
@@ -135,7 +166,7 @@ L_loop:     // for (; len > 0; m = m->m_next) {
  */
        cbz     m, Lin_cksum_whoops     // if (m == NULL) return -1;
        ldr     Wmlen, [m, #M_LEN]      // mlen = m->m_len;
-       ldr     data, [m, #M_DATA]      // mtod(m, uint8_t *)
+       ldr     ptr_data, [m, #M_DATA]  // mtod(m, uint8_t *)
 
 L_post_initial_offset:
 /*
@@ -357,7 +388,7 @@ L0_bytes:
 
 L_continue:
        cmp     len, #0
-       ldr     m, [m, #M_NEXT]                 // m = m->m_next
+       ldr     ptr_m, [m, #M_NEXT]                     // m = m->m_next
        b.gt    L_loop
 
 /*