libsyscall/custom/SYS.h

   1 /*
   2  * Copyright (c) 1999-2007 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_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. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /* Copyright (c) 1992 NeXT Computer, Inc.  All rights reserved.
  29  *
  30  *      File:   SYS.h
  31  *
  32  *      Definition of the user side of the UNIX system call interface
  33  *      for M98K.
  34  *
  35  *      Errors are flagged by the location of the trap return (ie., which
  36  *      instruction is executed upon rfi):
  37  *
  38  *              SC PC + 4:      Error (typically branch to cerror())
  39  *              SC PC + 8:      Success
  40  *
  41  * HISTORY
  42  * 18-Nov-92    Ben Fathi (benf@next.com)
  43  *      Ported to m98k.
  44  *
  45  *  9-Jan-92    Peter King (king@next.com)
  46  *      Created.
  47  */
  48
  49 #include <sys/syscall.h>
  50
  51 #ifndef SYS_setquota
  52 #define SYS_setquota    148
  53 #endif
  54 #ifndef SYS_quota
  55 #define SYS_quota       149
  56 #endif
  57
  58 #if defined(__i386__)
  59
  60 #include <architecture/i386/asm_help.h>
  61 #include <mach/i386/syscall_sw.h>
  62
  63 /*
  64  * We have two entry points. int's is used for syscalls which need to preserve
  65  * %ecx across the call, or return a 64-bit value in %eax:%edx. sysenter is used
  66  * for the majority of syscalls which just return a value in %eax.
  67  */
  68
  69 #define UNIX_SYSCALL_SYSENTER           call __sysenter_trap
  70 #define UNIX_SYSCALL(name, nargs)                       \
  71         .globl  cerror                                  ;\
  72 LEAF(_##name, 0)                                        ;\
  73         movl    $ SYS_##name, %eax                      ;\
  74         UNIX_SYSCALL_SYSENTER                           ;\
  75         jnb     2f                                      ;\
  76         BRANCH_EXTERN(cerror)                           ;\
  77 2:
  78
  79 #define UNIX_SYSCALL_INT(name, nargs)                   \
  80         .globl  cerror                                  ;\
  81 LEAF(_##name, 0)                                        ;\
  82         movl    $ SYS_##name, %eax                      ;\
  83         UNIX_SYSCALL_TRAP                               ;\
  84         jnb     2f                                      ;\
  85         BRANCH_EXTERN(cerror)                           ;\
  86 2:
  87
  88 #if defined(__SYSCALL_32BIT_ARG_BYTES) && ((__SYSCALL_32BIT_ARG_BYTES >= 4) && (__SYSCALL_32BIT_ARG_BYTES <= 20))
  89 #define UNIX_SYSCALL_NONAME(name, nargs)                        \
  90         movl    $(SYS_##name | (__SYSCALL_32BIT_ARG_BYTES << I386_SYSCALL_ARG_BYTES_SHIFT)), %eax               ;\
  91         UNIX_SYSCALL_SYSENTER                                   ;\
  92         jnb     2f                                              ;\
  93         BRANCH_EXTERN(cerror)                                   ;\
  94 2:
  95 #else /* __SYSCALL_32BIT_ARG_BYTES < 4 || > 20 */
  96 #define UNIX_SYSCALL_NONAME(name, nargs)                \
  97         .globl  cerror                                  ;\
  98         movl    $ SYS_##name, %eax                      ;\
  99         UNIX_SYSCALL_SYSENTER                           ;\
 100         jnb     2f                                      ;\
 101         BRANCH_EXTERN(cerror)                           ;\
 102 2:
 103 #endif
 104
 105 #define UNIX_SYSCALL_INT_NONAME(name, nargs)            \
 106         .globl  cerror                                  ;\
 107         movl    $ SYS_##name, %eax                      ;\
 108         UNIX_SYSCALL_TRAP                               ;\
 109         jnb     2f                                      ;\
 110         BRANCH_EXTERN(cerror)                           ;\
 111 2:
 112
 113 #define PSEUDO(pseudo, name, nargs)                     \
 114 LEAF(pseudo, 0)                                 ;\
 115         UNIX_SYSCALL_NONAME(name, nargs)
 116
 117 #define PSEUDO_INT(pseudo, name, nargs)                 \
 118 LEAF(pseudo, 0)                                 ;\
 119         UNIX_SYSCALL_INT_NONAME(name, nargs)
 120
 121 #define __SYSCALL(pseudo, name, nargs)                  \
 122         PSEUDO(pseudo, name, nargs)                     ;\
 123         ret
 124
 125 #define __SYSCALL_INT(pseudo, name, nargs)              \
 126         PSEUDO_INT(pseudo, name, nargs)                 ;\
 127         ret
 128
 129 #elif defined(__x86_64__)
 130
 131 #include <architecture/i386/asm_help.h>
 132 #include <mach/i386/syscall_sw.h>
 133
 134 #define UNIX_SYSCALL_SYSCALL    \
 135         movq    %rcx, %r10              ;\
 136         syscall
 137
 138 #define UNIX_SYSCALL(name, nargs)                       \
 139         .globl  cerror                                  ;\
 140 LEAF(_##name, 0)                                        ;\
 141         movl    $ SYSCALL_CONSTRUCT_UNIX(SYS_##name), %eax      ;\
 142         UNIX_SYSCALL_SYSCALL                            ;\
 143         jnb     2f                                      ;\
 144         BRANCH_EXTERN(cerror)                           ;\
 145 2:
 146
 147 #define UNIX_SYSCALL_NONAME(name, nargs)                \
 148         .globl  cerror                                  ;\
 149         movl    $ SYSCALL_CONSTRUCT_UNIX(SYS_##name), %eax      ;\
 150         UNIX_SYSCALL_SYSCALL                            ;\
 151         jnb     2f                                      ;\
 152         BRANCH_EXTERN(cerror)                           ;\
 153 2:
 154
 155 #define PSEUDO(pseudo, name, nargs)                     \
 156 LEAF(pseudo, 0)                                 ;\
 157         UNIX_SYSCALL_NONAME(name, nargs)
 158
 159 #define __SYSCALL(pseudo, name, nargs)                  \
 160         PSEUDO(pseudo, name, nargs)                     ;\
 161         ret
 162
 163 #else
 164 #error Unsupported architecture
 165 #endif