osfmk/i386/asm.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_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
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /*
  31  * @OSF_COPYRIGHT@
  32  */
  33 /*
  34  * Mach Operating System
  35  * Copyright (c) 1991,1990,1989 Carnegie Mellon University
  36  * All Rights Reserved.
  37  *
  38  * Permission to use, copy, modify and distribute this software and its
  39  * documentation is hereby granted, provided that both the copyright
  40  * notice and this permission notice appear in all copies of the
  41  * software, derivative works or modified versions, and any portions
  42  * thereof, and that both notices appear in supporting documentation.
  43  *
  44  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  45  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  46  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  47  *
  48  * Carnegie Mellon requests users of this software to return to
  49  *
  50  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  51  *  School of Computer Science
  52  *  Carnegie Mellon University
  53  *  Pittsburgh PA 15213-3890
  54  *
  55  * any improvements or extensions that they make and grant Carnegie Mellon
  56  * the rights to redistribute these changes.
  57  */
  58
  59 #ifndef _I386_ASM_H_
  60 #define _I386_ASM_H_
  61
  62 #ifdef _KERNEL
  63 #include <gprof.h>
  64 #endif  /* _KERNEL */
  65
  66 #ifdef MACH_KERNEL
  67 #include <mach_kdb.h>
  68 #else   /* !MACH_KERNEL */
  69 #define MACH_KDB 0
  70 #endif  /* !MACH_KERNEL */
  71
  72
  73 #if     defined(MACH_KERNEL) || defined(_KERNEL)
  74 #include <gprof.h>
  75 #endif  /* MACH_KERNEL || _KERNEL */
  76
  77
  78 #define S_PC     0(%esp)
  79 #define S_ARG0   4(%esp)
  80 #define S_ARG1   8(%esp)
  81 #define S_ARG2  12(%esp)
  82 #define S_ARG3  16(%esp)
  83
  84 #define FRAME   pushl %ebp; movl %esp, %ebp
  85 #define EMARF   leave
  86
  87 #define B_LINK   0(%ebp)
  88 #define B_PC     4(%ebp)
  89 #define B_ARG0   8(%ebp)
  90 #define B_ARG1  12(%ebp)
  91 #define B_ARG2  16(%ebp)
  92 #define B_ARG3  20(%ebp)
  93
  94 /* There is another definition of ALIGN for .c sources */
  95 #ifdef ASSEMBLER
  96 #define ALIGN 2,0x90
  97 #endif /* ASSEMBLER */
  98
  99 #ifndef FALIGN
 100 #define FALIGN ALIGN
 101 #endif
 102
 103 #define LB(x,n) n
 104 #if     __STDC__
 105 #ifndef __NO_UNDERSCORES__
 106 #define LCL(x)  L ## x
 107 #define EXT(x) _ ## x
 108 #define LEXT(x) _ ## x ## :
 109 #else
 110 #define LCL(x)  .L ## x
 111 #define EXT(x) x
 112 #define LEXT(x) x ## :
 113 #endif
 114 #define LBc(x,n) n ## :
 115 #define LBb(x,n) n ## b
 116 #define LBf(x,n) n ## f
 117 #else /* __STDC__ */
 118 #ifndef __NO_UNDERSCORES__
 119 #define LCL(x) L/**/x
 120 #define EXT(x) _/**/x
 121 #define LEXT(x) _/**/x/**/:
 122 #else /* __NO_UNDERSCORES__ */
 123 #define LCL(x)  .L/**/x
 124 #define EXT(x) x
 125 #define LEXT(x) x/**/:
 126 #endif /* __NO_UNDERSCORES__ */
 127 #define LBc(x,n) n/**/:
 128 #define LBb(x,n) n/**/b
 129 #define LBf(x,n) n/**/f
 130 #endif /* __STDC__ */
 131
 132 #define SVC .byte 0x9a; .long 0; .word 0x7
 133
 134 #define RPC_SVC .byte 0x9a; .long 0; .word 0xf
 135
 136 #define String  .asciz
 137 #define Value   .word
 138 #define Times(a,b) (a*b)
 139 #define Divide(a,b) (a/b)
 140
 141 #define INB     inb     %dx, %al
 142 #define OUTB    outb    %al, %dx
 143 #define INL     inl     %dx, %eax
 144 #define OUTL    outl    %eax, %dx
 145
 146 #define data16  .byte 0x66
 147 #define addr16  .byte 0x67
 148
 149 #if !GPROF
 150 #define MCOUNT
 151
 152 #elif defined(__SHARED__)
 153 #define MCOUNT          ; .data;\
 154                         .align ALIGN;\
 155                         LBc(x, 8) .long 0;\
 156                         .text;\
 157                         Gpush;\
 158                         Gload;\
 159                         leal Gotoff(LBb(x,8)),%edx;\
 160                         Egaddr(%eax,_mcount_ptr);\
 161                         Gpop;\
 162                         call *(%eax);
 163
 164 #else   /* !GPROF, !__SHARED__ */
 165 #define MCOUNT          ; call mcount;
 166 #endif /* GPROF */
 167
 168 #ifdef __ELF__
 169 #define ELF_FUNC(x)     .type x,@function
 170 #define ELF_DATA(x)     .type x,@object
 171 #define ELF_SIZE(x,s)   .size x,s
 172 #else
 173 #define ELF_FUNC(x)
 174 #define ELF_DATA(x)
 175 #define ELF_SIZE(x,s)
 176 #endif
 177
 178 #define Entry(x)        .globl EXT(x); ELF_FUNC(EXT(x)); .align FALIGN; LEXT(x)
 179 #define ENTRY(x)        Entry(x) MCOUNT
 180 #define ENTRY2(x,y)     .globl EXT(x); .globl EXT(y); \
 181                         ELF_FUNC(EXT(x)); ELF_FUNC(EXT(y)); \
 182                         .align FALIGN; LEXT(x); LEXT(y) \
 183                         MCOUNT
 184 #if __STDC__
 185 #define ASENTRY(x)      .globl x; .align FALIGN; x ## : ELF_FUNC(x) MCOUNT
 186 #else
 187 #define ASENTRY(x)      .globl x; .align FALIGN; x: ELF_FUNC(x) MCOUNT
 188 #endif /* __STDC__ */
 189
 190 #define DATA(x)         .globl EXT(x); ELF_DATA(EXT(x)); .align ALIGN; LEXT(x)
 191
 192 #define End(x)          ELF_SIZE(x,.-x)
 193 #define END(x)          End(EXT(x))
 194 #define ENDDATA(x)      END(x)
 195 #define Enddata(x)      End(x)
 196
 197 /*
 198  * ELF shared library accessor macros.
 199  * Gpush saves the %ebx register used for the GOT address
 200  * Gpop pops %ebx if we need a GOT
 201  * Gload loads %ebx with the GOT address if shared libraries are used
 202  * Gcall calls an external function.
 203  * Gotoff allows you to reference local labels.
 204  * Gotoff2 allows you to reference local labels with an index reg.
 205  * Gotoff3 allows you to reference local labels with an index reg & size.
 206  * Gaddr loads up a register with an address of an external item.
 207  * Gstack is the number of bytes that Gpush pushes on the stack.
 208  *
 209  * Varients of the above with E or L prefixes do EXT(name) or LCL(name)
 210  * respectively.
 211  */
 212
 213 #ifndef __SHARED__
 214 #define Gpush
 215 #define Gpop
 216 #define Gload
 217 #define Gcall(func)             call func
 218 #define Gotoff(lab)             lab
 219 #define Gotoff2(l,r)            l(r)
 220 #define Gotoff3(l,r,s)          l(,r,s)
 221 #define Gaddr(to,lab)           movl $lab,to
 222 #define Gcmp(lab,reg)           cmpl $lab,reg
 223 #define Gmemload(lab,reg)       movl lab,reg
 224 #define Gmemstore(reg,lab,tmp)  movl reg,lab
 225 #define Gstack                  0
 226
 227 #else
 228 #ifdef __ELF__                  /* ELF shared libraries */
 229 #define Gpush                   pushl %ebx
 230 #define Gpop                    popl %ebx
 231 #define Gload                   call 9f; 9: popl %ebx; addl $_GLOBAL_OFFSET_TABLE_+[.-9b],%ebx
 232 #define Gcall(func)             call EXT(func)@PLT
 233 #define Gotoff(lab)             lab@GOTOFF(%ebx)
 234 #define Gotoff2(l,r)            l@GOTOFF(%ebx,r)
 235 #define Gotoff3(l,r,s)          l@GOTOFF(%ebx,r,s)
 236 #define Gaddr(to,lab)           movl lab@GOT(%ebx),to
 237 #define Gcmp(lab,reg)           cmpl reg,lab@GOT(%ebx)
 238 #define Gmemload(lab,reg)       movl lab@GOT(%ebx),reg; movl (reg),reg
 239 #define Gmemstore(reg,lab,tmp)  movl lab@GOT(%ebx),tmp; movl reg,(tmp)
 240 #define Gstack                  4
 241
 242 #else                           /* ROSE shared libraries */
 243 #define Gpush
 244 #define Gpop
 245 #define Gload
 246 #define Gcall(func)             call *9f; .data; .align ALIGN; 9: .long func; .text
 247 #define Gotoff(lab)             lab
 248 #define Gotoff2(l,r)            l(r)
 249 #define Gotoff3(l,r,s)          l(,r,s)
 250 #define Gaddr(to,lab)           movl 9f,to; .data; .align ALIGN; 9: .long lab; .text
 251 #define Gcmp(lab,reg)           cmpl reg,9f; .data; .align ALIGN; 9: .long lab; .text
 252 #define Gmemload(lab,reg)       movl 9f,reg; movl (reg),reg; .data; .align ALIGN; 9: .long lab; .text
 253 #define Gmemstore(reg,lab,tmp)  movl 9f,tmp; movl reg,(tmp); .data; .align ALIGN; 9: .long lab; .text
 254 #define Gstack                  0
 255 #endif  /* __ELF__ */
 256 #endif  /* __SHARED__ */
 257
 258 /* Egotoff is not provided, since external symbols should not use @GOTOFF
 259    relocations.  */
 260 #define Egcall(func)            Gcall(EXT(func))
 261 #define Egaddr(to,lab)          Gaddr(to,EXT(lab))
 262 #define Egcmp(lab,reg)          Gcmp(EXT(lab),reg)
 263 #define Egmemload(lab,reg)      Gmemload(EXT(lab),reg)
 264 #define Egmemstore(reg,lab,tmp) Gmemstore(reg,EXT(lab),tmp)
 265
 266 #define Lgotoff(lab)            Gotoff(LCL(lab))
 267 #define Lgotoff2(l,r)           Gotoff2(LCL(l),r)
 268 #define Lgotoff3(l,r,s)         Gotoff3(LCL(l),r,s)
 269 #define Lgcmp(lab,reg)          Gcmp(LCL(lab),reg)
 270 #define Lgmemload(lab,reg)      movl Lgotoff(lab),reg
 271 #define Lgmemstore(reg,lab,tmp) movl reg,Lgotoff(lab)
 272
 273 #ifdef ASSEMBLER
 274 #if     MACH_KDB
 275 #include <ddb/stab.h>
 276 /*
 277  * This pseudo-assembler line is added so that there will be at least
 278  *      one N_SO entry in the symbol stable to define the current file name.
 279  */
 280 #endif  /* MACH_KDB */
 281
 282 #else /* NOT ASSEMBLER */
 283
 284 /* These defines are here for .c files that wish to reference global symbols
 285  * within __asm__ statements.
 286  */
 287 #ifndef __NO_UNDERSCORES__
 288 #define CC_SYM_PREFIX "_"
 289 #else
 290 #define CC_SYM_PREFIX ""
 291 #endif /* __NO_UNDERSCORES__ */
 292 #endif /* ASSEMBLER */
 293
 294 #endif /* _I386_ASM_H_ */