libsyscall/wrappers/varargs_wrappers.s

   1 /*
   2  * Copyright (c) 2011-2013 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 #ifdef __arm64__
  25
  26 #include "../custom/SYS.h"
  27 #include <mach/arm64/asm.h>
  28
  29 /*
  30  * Stubs are to handle the ARM64 ABI for variadic functions'
  31  * not matching the ABI used by the system call handler.
  32  */
  33
  34 /*
  35  *      sem_t* sem_open(const char *name, int oflag, ...);
  36  *      sem_t* __sem_open(const char *name, int oflag, int mode, int value);
  37  */
  38 MI_ENTRY_POINT(_sem_open)
  39         ARM64_STACK_PROLOG
  40         PUSH_FRAME
  41 #if __LP64__
  42         ldp     x2, x3, [fp, #16]
  43 #else
  44         ldp     w2, w3, [fp, #16]
  45 #endif
  46         MI_CALL_EXTERNAL(___sem_open)
  47 #if !__LP64__
  48         /* xnu returns a 64-bit '-1' on failure, but pointers must have the high
  49          * 32-bits set to zero. The following instruction is equivalent to
  50          * masking off the top 32-bits.
  51          */
  52         mov w0, w0
  53 #endif
  54         POP_FRAME
  55         ARM64_STACK_EPILOG
  56
  57 /*
  58  *      int open(const char *name, int oflag, ...);
  59  *      int __open(const char *name, int oflag, int mode, int value);
  60  */
  61 MI_ENTRY_POINT(_open)
  62         ARM64_STACK_PROLOG
  63         PUSH_FRAME
  64 #if __LP64__
  65         ldr     x2, [fp, #16]
  66 #else
  67         ldr     w2, [fp, #16]
  68 #endif
  69         MI_CALL_EXTERNAL(___open)
  70         POP_FRAME
  71         ARM64_STACK_EPILOG
  72
  73 /*
  74  *      int open_nocancel(const char *name, int oflag, ...);
  75  *      int __open_nocancel(const char *name, int oflag, int mode);
  76  */
  77 MI_ENTRY_POINT(_open$NOCANCEL)
  78         ARM64_STACK_PROLOG
  79         PUSH_FRAME
  80 #if __LP64__
  81         ldr     x2, [fp, #16]
  82 #else
  83         ldr     w2, [fp, #16]
  84 #endif
  85         MI_CALL_EXTERNAL(___open_nocancel)
  86         POP_FRAME
  87         ARM64_STACK_EPILOG
  88
  89 /*
  90  *      int openat(int fd,const char *name, int oflag, ...);
  91  *      int __openat(int fd, const char *name, int oflag, int mode, int value);
  92  */
  93 MI_ENTRY_POINT(_openat)
  94         ARM64_STACK_PROLOG
  95         PUSH_FRAME
  96 #if __LP64__
  97         ldr     x3, [fp, #16]
  98 #else
  99         ldr     w3, [fp, #16]
 100 #endif
 101         MI_CALL_EXTERNAL(___openat)
 102         POP_FRAME
 103         ARM64_STACK_EPILOG
 104
 105 /*
 106  *      int openat_nocancel(int fd, const char *name, int oflag, ...);
 107  *      int __openat_nocancel(int fd, const char *name, int oflag, int mode);
 108  */
 109 MI_ENTRY_POINT(_openat$NOCANCEL)
 110         ARM64_STACK_PROLOG
 111         PUSH_FRAME
 112 #if __LP64__
 113         ldr     x3, [fp, #16]
 114 #else
 115         ldr     w3, [fp, #16]
 116 #endif
 117         MI_CALL_EXTERNAL(___openat_nocancel)
 118         POP_FRAME
 119         ARM64_STACK_EPILOG
 120
 121 /*
 122  * int shm_open(const char *, int, ...);
 123  * int __shm_open(const char*, int oflag, int mode);
 124  */
 125 MI_ENTRY_POINT(_shm_open)
 126         ARM64_STACK_PROLOG
 127         PUSH_FRAME
 128 #if __LP64__
 129         ldr     x2, [fp, #16]
 130 #else
 131         ldr     w2, [fp, #16]
 132 #endif
 133         MI_CALL_EXTERNAL(___shm_open)
 134         POP_FRAME
 135         ARM64_STACK_EPILOG
 136
 137 /*
 138  * int msgsys(int, ...);
 139  * int __msgsys(int which, int a2, int a3, int a4, int a5);
 140  */
 141 MI_ENTRY_POINT(_msgsys)
 142         ARM64_STACK_PROLOG
 143         PUSH_FRAME
 144 #if __LP64__
 145         ldp     x1, x2, [fp, #16]
 146         ldp     x3, x4, [fp, #32]
 147 #else
 148         ldp     w1, w2, [fp, #16]
 149         ldp     w3, w4, [fp, #24]
 150 #endif
 151         MI_CALL_EXTERNAL(___msgsys)
 152         POP_FRAME
 153
 154 /*
 155  * int semsys(int, ...);
 156  * int __semsys(int which, int a2, int a3, int a4, int a5);
 157  */
 158 MI_ENTRY_POINT(_semsys)
 159         ARM64_STACK_PROLOG
 160         PUSH_FRAME
 161 #if __LP64__
 162         ldp     x1, x2, [fp, #16]
 163         ldp     x3, x4, [fp, #32]
 164 #else
 165         ldp     w1, w2, [fp, #16]
 166         ldp     w3, w4, [fp, #24]
 167 #endif
 168         MI_CALL_EXTERNAL(___semsys)
 169         POP_FRAME
 170         ARM64_STACK_EPILOG
 171
 172 /*
 173  * int  semctl(int, int, int, ...);
 174  * int __semctl(int semid, int semnum, int cmd, semun_t arg);
 175  */
 176  MI_ENTRY_POINT(_semctl)
 177         ARM64_STACK_PROLOG
 178         PUSH_FRAME
 179 #if __LP64__
 180         ldr     x3, [fp, #16]
 181 #else
 182         ldr     w3, [fp, #16]
 183 #endif
 184         MI_CALL_EXTERNAL(___semctl)
 185         POP_FRAME
 186         ARM64_STACK_EPILOG
 187
 188 /*
 189  * int  shmsys(int, ...);
 190  * int __shmsys(int which, int a2, int a3, int a4);
 191  */
 192  MI_ENTRY_POINT(_shmsys)
 193         ARM64_STACK_PROLOG
 194         PUSH_FRAME
 195 #if __LP64__
 196         ldp     x1, x2, [fp, #16]
 197         ldr     x3, [fp, #32]
 198 #else
 199         ldp     w1, w2, [fp, #16]
 200         ldr     w3, [fp, #24]
 201 #endif
 202         MI_CALL_EXTERNAL(___shmsys)
 203         POP_FRAME
 204         ARM64_STACK_EPILOG
 205
 206 #endif /* defined(__arm64__) */