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(__ppc__) || defined(__ppc64__)
  59
  60 #include <architecture/ppc/mode_independent_asm.h>
  61
  62 /* From rhapsody kernel mach/ppc/syscall_sw.h */
  63 #define kernel_trap_args_0
  64 #define kernel_trap_args_1
  65 #define kernel_trap_args_2
  66 #define kernel_trap_args_3
  67 #define kernel_trap_args_4
  68 #define kernel_trap_args_5
  69 #define kernel_trap_args_6
  70 #define kernel_trap_args_7
  71 #define kernel_trap_args_8
  72 /* End of rhapsody kernel mach/ppc/syscall_sw.h */
  73
  74 /*
  75  * Macros.
  76  */
  77
  78 #define SYSCALL(name, nargs)                    \
  79         .globl  cerror                          @\
  80     MI_ENTRY_POINT(_##name)     @\
  81         kernel_trap_args_##nargs    @\
  82         li      r0,SYS_##name                   @\
  83         sc                          @\
  84         b       1f                      @\
  85         blr                         @\
  86 1:      MI_BRANCH_EXTERNAL(cerror)
  87
  88
  89 #define SYSCALL_NONAME(name, nargs)             \
  90         .globl  cerror                          @\
  91         kernel_trap_args_##nargs    @\
  92         li      r0,SYS_##name                   @\
  93         sc                          @\
  94         b       1f                      @\
  95         b       2f                      @\
  96 1:      MI_BRANCH_EXTERNAL(cerror)  @\
  97 2:
  98
  99
 100 #define PSEUDO(pseudo, name, nargs)             \
 101     .private_extern  _##pseudo           @\
 102     .text                       @\
 103     .align  2                   @\
 104 _##pseudo:                      @\
 105         SYSCALL_NONAME(name, nargs)
 106
 107 #define __SYSCALL(pseudo, name, nargs)  \
 108     PSEUDO(pseudo, name, nargs) @\
 109     blr
 110
 111 #elif defined(__i386__)
 112
 113 #include <architecture/i386/asm_help.h>
 114 #include <mach/i386/syscall_sw.h>
 115
 116 /*
 117  * We have two entry points. int's is used for syscalls which need to preserve
 118  * %ecx across the call, or return a 64-bit value in %eax:%edx. sysenter is used
 119  * for the majority of syscalls which just return a value in %eax.
 120  */
 121
 122 #define UNIX_SYSCALL_SYSENTER           call __sysenter_trap
 123 #define UNIX_SYSCALL(name, nargs)                       \
 124         .globl  cerror                                  ;\
 125 LEAF(_##name, 0)                                        ;\
 126         movl    $ SYS_##name, %eax                      ;\
 127         UNIX_SYSCALL_SYSENTER                           ;\
 128         jnb     2f                                      ;\
 129         BRANCH_EXTERN(cerror)                           ;\
 130 2:
 131
 132 #define UNIX_SYSCALL_INT(name, nargs)                   \
 133         .globl  cerror                                  ;\
 134 LEAF(_##name, 0)                                        ;\
 135         movl    $ SYS_##name, %eax                      ;\
 136         UNIX_SYSCALL_TRAP                               ;\
 137         jnb     2f                                      ;\
 138         BRANCH_EXTERN(cerror)                           ;\
 139 2:
 140
 141 #if defined(__SYSCALL_I386_ARG_BYTES) && ((__SYSCALL_I386_ARG_BYTES >= 4) && (__SYSCALL_I386_ARG_BYTES <= 20))
 142 #define UNIX_SYSCALL_NONAME(name, nargs)                        \
 143         movl    $(SYS_##name | (__SYSCALL_I386_ARG_BYTES << I386_SYSCALL_ARG_BYTES_SHIFT)), %eax                ;\
 144         UNIX_SYSCALL_SYSENTER                                   ;\
 145         jnb     2f                                              ;\
 146         BRANCH_EXTERN(cerror)                                   ;\
 147 2:
 148 #else /* __SYSCALL_I386_ARG_BYTES < 4 || > 20 */
 149 #define UNIX_SYSCALL_NONAME(name, nargs)                \
 150         .globl  cerror                                  ;\
 151         movl    $ SYS_##name, %eax                      ;\
 152         UNIX_SYSCALL_SYSENTER                           ;\
 153         jnb     2f                                      ;\
 154         BRANCH_EXTERN(cerror)                           ;\
 155 2:
 156 #endif
 157
 158 #define UNIX_SYSCALL_INT_NONAME(name, nargs)            \
 159         .globl  cerror                                  ;\
 160         movl    $ SYS_##name, %eax                      ;\
 161         UNIX_SYSCALL_TRAP                               ;\
 162         jnb     2f                                      ;\
 163         BRANCH_EXTERN(cerror)                           ;\
 164 2:
 165
 166 #define PSEUDO(pseudo, name, nargs)                     \
 167 LEAF(_##pseudo, 0)                                      ;\
 168         UNIX_SYSCALL_NONAME(name, nargs)
 169
 170 #define PSEUDO_INT(pseudo, name, nargs)                 \
 171 LEAF(_##pseudo, 0)                                      ;\
 172         UNIX_SYSCALL_INT_NONAME(name, nargs)
 173
 174 #define __SYSCALL(pseudo, name, nargs)                  \
 175         PSEUDO(pseudo, name, nargs)                     ;\
 176         ret
 177
 178 #define __SYSCALL_INT(pseudo, name, nargs)              \
 179         PSEUDO_INT(pseudo, name, nargs)                 ;\
 180         ret
 181
 182 #elif defined(__x86_64__)
 183
 184 #include <architecture/i386/asm_help.h>
 185 #include <mach/i386/syscall_sw.h>
 186
 187 #define UNIX_SYSCALL_SYSCALL    \
 188         movq    %rcx, %r10              ;\
 189         syscall
 190
 191 #define UNIX_SYSCALL(name, nargs)                       \
 192         .globl  cerror                                  ;\
 193 LEAF(_##name, 0)                                        ;\
 194         movl    $ SYSCALL_CONSTRUCT_UNIX(SYS_##name), %eax      ;\
 195         UNIX_SYSCALL_SYSCALL                            ;\
 196         jnb     2f                                      ;\
 197         BRANCH_EXTERN(cerror)                           ;\
 198 2:
 199
 200 #define UNIX_SYSCALL_NONAME(name, nargs)                \
 201         .globl  cerror                                  ;\
 202         movl    $ SYSCALL_CONSTRUCT_UNIX(SYS_##name), %eax      ;\
 203         UNIX_SYSCALL_SYSCALL                            ;\
 204         jnb     2f                                      ;\
 205         BRANCH_EXTERN(cerror)                           ;\
 206 2:
 207
 208 #define PSEUDO(pseudo, name, nargs)                     \
 209 LEAF(_##pseudo, 0)                                      ;\
 210         UNIX_SYSCALL_NONAME(name, nargs)
 211
 212 #define __SYSCALL(pseudo, name, nargs)                  \
 213         PSEUDO(pseudo, name, nargs)                     ;\
 214         ret
 215
 216 #else
 217 #error Unsupported architecture
 218 #endif