FreeBSD/Linux Kernel Cross Reference
sys/osfmk/i386/asm.h

     /*
      * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
      *
      * @APPLE_LICENSE_HEADER_START@
      * 
      * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
      * 
      * 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. 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_LICENSE_HEADER_END@
     */
    /*
     * @OSF_COPYRIGHT@
     */
    /* 
     * Mach Operating System
     * Copyright (c) 1991,1990,1989 Carnegie Mellon University
     * All Rights Reserved.
     * 
     * Permission to use, copy, modify and distribute this software and its
     * documentation is hereby granted, provided that both the copyright
     * notice and this permission notice appear in all copies of the
     * software, derivative works or modified versions, and any portions
     * thereof, and that both notices appear in supporting documentation.
     * 
     * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
     * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     * 
     * Carnegie Mellon requests users of this software to return to
     * 
     *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
     *  School of Computer Science
     *  Carnegie Mellon University
     *  Pittsburgh PA 15213-3890
     * 
     * any improvements or extensions that they make and grant Carnegie Mellon
     * the rights to redistribute these changes.
     */
    
    #ifndef _I386_ASM_H_
    #define _I386_ASM_H_
    
    #ifdef _KERNEL
    #include <gprof.h>
    #endif  /* _KERNEL */
    
    #ifdef MACH_KERNEL
    #include <mach_kdb.h>
    #else   /* !MACH_KERNEL */
    #define MACH_KDB 0
    #endif  /* !MACH_KERNEL */
    
    
    #if     defined(MACH_KERNEL) || defined(_KERNEL)
    #include <gprof.h>
    #endif  /* MACH_KERNEL || _KERNEL */
    
    
    #define S_ARG0   4(%esp)
    #define S_ARG1   8(%esp)
    #define S_ARG2  12(%esp)
    #define S_ARG3  16(%esp)
    
    #define FRAME   pushl %ebp; movl %esp, %ebp
    #define EMARF   leave
    
    #define B_ARG0   8(%ebp)
    #define B_ARG1  12(%ebp)
    #define B_ARG2  16(%ebp)
    #define B_ARG3  20(%ebp)
    
    /* There is another definition of ALIGN for .c sources */
    #ifdef ASSEMBLER
    #define ALIGN 2,0x90
    #endif /* ASSEMBLER */
    
    #ifndef FALIGN
    #define FALIGN ALIGN
    #endif
    
    #define LB(x,n) n
    #if     __STDC__
    #ifndef __NO_UNDERSCORES__
    #define LCL(x)  L ## x
    #define EXT(x) _ ## x
   #define LEXT(x) _ ## x ## :
   #else
   #define LCL(x)  .L ## x
   #define EXT(x) x
   #define LEXT(x) x ## :
   #endif
   #define LBc(x,n) n ## :
   #define LBb(x,n) n ## b
   #define LBf(x,n) n ## f
   #else /* __STDC__ */
   #ifndef __NO_UNDERSCORES__
   #define LCL(x) L/**/x
   #define EXT(x) _/**/x
   #define LEXT(x) _/**/x/**/:
   #else /* __NO_UNDERSCORES__ */
   #define LCL(x)  .L/**/x
   #define EXT(x) x
   #define LEXT(x) x/**/:
   #endif /* __NO_UNDERSCORES__ */
   #define LBc(x,n) n/**/:
   #define LBb(x,n) n/**/b
   #define LBf(x,n) n/**/f
   #endif /* __STDC__ */
   
   #define SVC .byte 0x9a; .long 0; .word 0x7
   
   #define RPC_SVC .byte 0x9a; .long 0; .word 0xf
   
   #define String  .asciz
   #define Value   .word
   #define Times(a,b) (a*b)
   #define Divide(a,b) (a/b)
   
   #define INB     inb     %dx, %al
   #define OUTB    outb    %al, %dx
   #define INL     inl     %dx, %eax
   #define OUTL    outl    %eax, %dx
   
   #define data16  .byte 0x66
   #define addr16  .byte 0x67
   
   #if !GPROF
   #define MCOUNT
   
   #elif defined(__SHARED__)
   #define MCOUNT          ; .data;\
                           .align ALIGN;\
                           LBc(x, 8) .long 0;\
                           .text;\
                           Gpush;\
                           Gload;\
                           leal Gotoff(LBb(x,8)),%edx;\
                           Egaddr(%eax,_mcount_ptr);\
                           Gpop;\
                           call *(%eax);
   
   #else   /* !GPROF, !__SHARED__ */
   #define MCOUNT          ; .data;\
                           .align ALIGN;\
                           LBc(x, 8) .long 0;\
                           .text;\
                           movl LBb(x,8),%edx;\
                           call *EXT(_mcount_ptr);
   
   #endif /* GPROF */
   
   #ifdef __ELF__
   #define ELF_FUNC(x)     .type x,@function
   #define ELF_DATA(x)     .type x,@object
   #define ELF_SIZE(x,s)   .size x,s
   #else
   #define ELF_FUNC(x)
   #define ELF_DATA(x)
   #define ELF_SIZE(x,s)
   #endif
   
   #define Entry(x)        .globl EXT(x); ELF_FUNC(EXT(x)); .align FALIGN; LEXT(x)
   #define ENTRY(x)        Entry(x) MCOUNT
   #define ENTRY2(x,y)     .globl EXT(x); .globl EXT(y); \
                           ELF_FUNC(EXT(x)); ELF_FUNC(EXT(y)); \
                           .align FALIGN; LEXT(x); LEXT(y) \
                           MCOUNT
   #if __STDC__
   #define ASENTRY(x)      .globl x; .align FALIGN; x ## : ELF_FUNC(x) MCOUNT
   #else
   #define ASENTRY(x)      .globl x; .align FALIGN; x: ELF_FUNC(x) MCOUNT
   #endif /* __STDC__ */
   
   #define DATA(x)         .globl EXT(x); ELF_DATA(EXT(x)); .align ALIGN; LEXT(x)
   
   #define End(x)          ELF_SIZE(x,.-x)
   #define END(x)          End(EXT(x))
   #define ENDDATA(x)      END(x)
   #define Enddata(x)      End(x)
   
   /*
    * ELF shared library accessor macros.
    * Gpush saves the %ebx register used for the GOT address
    * Gpop pops %ebx if we need a GOT
    * Gload loads %ebx with the GOT address if shared libraries are used
    * Gcall calls an external function.
    * Gotoff allows you to reference local labels.
    * Gotoff2 allows you to reference local labels with an index reg.
    * Gotoff3 allows you to reference local labels with an index reg & size.
    * Gaddr loads up a register with an address of an external item.
    * Gstack is the number of bytes that Gpush pushes on the stack.
    *
    * Varients of the above with E or L prefixes do EXT(name) or LCL(name)
    * respectively.
    */
   
   #ifndef __SHARED__
   #define Gpush
   #define Gpop
   #define Gload
   #define Gcall(func)             call func
   #define Gotoff(lab)             lab
   #define Gotoff2(l,r)            l(r)
   #define Gotoff3(l,r,s)          l(,r,s)
   #define Gaddr(to,lab)           movl $lab,to
   #define Gcmp(lab,reg)           cmpl $lab,reg
   #define Gmemload(lab,reg)       movl lab,reg
   #define Gmemstore(reg,lab,tmp)  movl reg,lab
   #define Gstack                  0
   
   #else
   #ifdef __ELF__                  /* ELF shared libraries */
   #define Gpush                   pushl %ebx
   #define Gpop                    popl %ebx
   #define Gload                   call 9f; 9: popl %ebx; addl $_GLOBAL_OFFSET_TABLE_+[.-9b],%ebx
   #define Gcall(func)             call EXT(func)@PLT
   #define Gotoff(lab)             lab@GOTOFF(%ebx)
   #define Gotoff2(l,r)            l@GOTOFF(%ebx,r)
   #define Gotoff3(l,r,s)          l@GOTOFF(%ebx,r,s)
   #define Gaddr(to,lab)           movl lab@GOT(%ebx),to
   #define Gcmp(lab,reg)           cmpl reg,lab@GOT(%ebx)
   #define Gmemload(lab,reg)       movl lab@GOT(%ebx),reg; movl (reg),reg
   #define Gmemstore(reg,lab,tmp)  movl lab@GOT(%ebx),tmp; movl reg,(tmp)
   #define Gstack                  4
   
   #else                           /* ROSE shared libraries */
   #define Gpush
   #define Gpop
   #define Gload
   #define Gcall(func)             call *9f; .data; .align ALIGN; 9: .long func; .text
   #define Gotoff(lab)             lab
   #define Gotoff2(l,r)            l(r)
   #define Gotoff3(l,r,s)          l(,r,s)
   #define Gaddr(to,lab)           movl 9f,to; .data; .align ALIGN; 9: .long lab; .text
   #define Gcmp(lab,reg)           cmpl reg,9f; .data; .align ALIGN; 9: .long lab; .text
   #define Gmemload(lab,reg)       movl 9f,reg; movl (reg),reg; .data; .align ALIGN; 9: .long lab; .text
   #define Gmemstore(reg,lab,tmp)  movl 9f,tmp; movl reg,(tmp); .data; .align ALIGN; 9: .long lab; .text
   #define Gstack                  0
   #endif  /* __ELF__ */
   #endif  /* __SHARED__ */
   
   /* Egotoff is not provided, since external symbols should not use @GOTOFF
      relocations.  */
   #define Egcall(func)            Gcall(EXT(func))
   #define Egaddr(to,lab)          Gaddr(to,EXT(lab))
   #define Egcmp(lab,reg)          Gcmp(EXT(lab),reg)
   #define Egmemload(lab,reg)      Gmemload(EXT(lab),reg)
   #define Egmemstore(reg,lab,tmp) Gmemstore(reg,EXT(lab),tmp)
   
   #define Lgotoff(lab)            Gotoff(LCL(lab))
   #define Lgotoff2(l,r)           Gotoff2(LCL(l),r)
   #define Lgotoff3(l,r,s)         Gotoff3(LCL(l),r,s)
   #define Lgcmp(lab,reg)          Gcmp(LCL(lab),reg)
   #define Lgmemload(lab,reg)      movl Lgotoff(lab),reg
   #define Lgmemstore(reg,lab,tmp) movl reg,Lgotoff(lab)
   
   #ifdef ASSEMBLER
   #if     MACH_KDB
   #include <ddb/stab.h>
   /*
    * This pseudo-assembler line is added so that there will be at least
    *      one N_SO entry in the symbol stable to define the current file name.
    */
   #endif  /* MACH_KDB */
   
   #else /* NOT ASSEMBLER */
   
   /* These defines are here for .c files that wish to reference global symbols
    * within __asm__ statements. 
    */
   #ifndef __NO_UNDERSCORES__
   #define CC_SYM_PREFIX "_"
   #else
   #define CC_SYM_PREFIX ""
   #endif /* __NO_UNDERSCORES__ */
   #endif /* ASSEMBLER */
   
   #endif /* _I386_ASM_H_ */

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