/*      $NetBSD: asm.h,v 1.47 2025/01/05 16:53:26 riastradh Exp $       */

/*-
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * William Jolitz.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *      @(#)asm.h       5.5 (Berkeley) 5/7/91
 */

#ifndef _I386_ASM_H_
#define _I386_ASM_H_

#ifdef _KERNEL_OPT
#include "opt_multiprocessor.h"
#endif

#ifdef __PIC__
#define PIC_PROLOGUE    \
        pushl   %ebx;   \
        call    1f;     \
1:                      \
        popl    %ebx;   \
        addl    $_GLOBAL_OFFSET_TABLE_+[.-1b], %ebx
#define PIC_EPILOGUE    \
        popl    %ebx
#define PIC_PLT(x)      x@PLT
#define PIC_GOT(x)      x@GOT(%ebx)
#define PIC_GOTOFF(x)   x@GOTOFF(%ebx)
#else
#define PIC_PROLOGUE
#define PIC_EPILOGUE
#define PIC_PLT(x)      x
#define PIC_GOT(x)      x
#define PIC_GOTOFF(x)   x
#endif

#ifdef __ELF__
# define _C_LABEL(x)    x
#else
# ifdef __STDC__
#  define _C_LABEL(x)   _ ## x
# else
#  define _C_LABEL(x)   _/**/x
# endif
#endif
#define _ASM_LABEL(x)   x

#define CVAROFF(x, y)           _C_LABEL(x) + y

#ifdef __STDC__
# define __CONCAT(x,y)  x ## y
# define __STRING(x)    #x
#else
# define __CONCAT(x,y)  x/**/y
# define __STRING(x)    "x"
#endif

/* let kernels and others override entrypoint alignment */
#if !defined(_ALIGN_TEXT) && !defined(_KERNEL)
# ifdef _STANDALONE
#  define _ALIGN_TEXT .align 1
# elif defined __ELF__
#  define _ALIGN_TEXT .align 16
# else
#  define _ALIGN_TEXT .align 4
# endif
#endif

#define _ENTRY(x) \
        .text; _ALIGN_TEXT; .globl x; .type x,@function; x:
#define _LABEL(x) \
        .globl x; x:

#ifdef _KERNEL

#define CPUVAR(off) %fs:__CONCAT(CPU_INFO_,off)

/* XXX Can't use __CONCAT() here, as it would be evaluated incorrectly. */
#ifdef __ELF__
#ifdef __STDC__
#define IDTVEC(name) \
        ALIGN_TEXT; .globl X ## name; .type X ## name,@function; X ## name:
#define IDTVEC_END(name) \
        .size X ## name, . - X ## name
#else 
#define IDTVEC(name) \
        ALIGN_TEXT; .globl X/**/name; .type X/**/name,@function; X/**/name:
#define IDTVEC_END(name) \
        .size X/**/name, . - X/**/name
#endif /* __STDC__ */ 
#else 
#ifdef __STDC__
#define IDTVEC(name) \
        ALIGN_TEXT; .globl _X ## name; .type _X ## name,@function; _X ## name: 
#define IDTVEC_END(name) \
        .size _X ## name, . - _X ## name
#else
#define IDTVEC(name) \
        ALIGN_TEXT; .globl _X/**/name; .type _X/**/name,@function; _X/**/name:
#define IDTVEC_END(name) \
        .size _X/**/name, . - _X/**/name
#endif /* __STDC__ */
#endif /* __ELF__ */

#ifdef _STANDALONE
#define ALIGN_DATA      .align  4
#define ALIGN_TEXT      .align  4       /* 4-byte boundaries */
#define SUPERALIGN_TEXT .align  16      /* 15-byte boundaries */
#elif defined __ELF__
#define ALIGN_DATA      .align  4
#define ALIGN_TEXT      .align  16      /* 16-byte boundaries */
#define SUPERALIGN_TEXT .align  16      /* 16-byte boundaries */
#else
#define ALIGN_DATA      .align  2
#define ALIGN_TEXT      .align  4       /* 16-byte boundaries */
#define SUPERALIGN_TEXT .align  4       /* 16-byte boundaries */
#endif /* __ELF__ */

#define _ALIGN_TEXT ALIGN_TEXT

#ifdef GPROF
#ifdef __ELF__
#define MCOUNT_ASM      call    _C_LABEL(__mcount)
#else /* __ELF__ */
#define MCOUNT_ASM      call    _C_LABEL(mcount)
#endif /* __ELF__ */
#else /* GPROF */
#define MCOUNT_ASM      /* nothing */
#endif /* GPROF */

#endif /* _KERNEL */



#ifdef GPROF
# ifdef __ELF__
#  define _PROF_PROLOGUE        \
        pushl %ebp; movl %esp,%ebp; call PIC_PLT(__mcount); popl %ebp
# else 
#  define _PROF_PROLOGUE        \
        pushl %ebp; movl %esp,%ebp; call PIC_PLT(mcount); popl %ebp
# endif
#else
# define _PROF_PROLOGUE
#endif

#define ENTRY(y)        _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE
#define NENTRY(y)       _ENTRY(_C_LABEL(y))
#define ALTENTRY(x)     NENTRY(x)
#define ASENTRY(y)      _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
#define LABEL(y)        _LABEL(_C_LABEL(y))
#define END(y)          .size y, . - y

#define ASMSTR          .asciz

#ifdef __ELF__
#define _IDENTSTR(x)    .pushsection ".ident","MS",@progbits,1;         \
                        x;                                              \
                        .popsection
#else
#define _IDENTSTR(x)    .text; x
#endif
#ifdef _NETBSD_REVISIONID
#define RCSID(_s)                                                             \
        _IDENTSTR(.asciz _s);                                                 \
        _IDENTSTR(.ascii "$"; .ascii "NetBSD: "; .ascii __FILE__; .ascii " "; \
            .ascii _NETBSD_REVISIONID; .asciz " $")
#else
#define RCSID(_s)       _IDENTSTR(.asciz _s)
#endif

#ifdef NO_KERNEL_RCSIDS
#define __KERNEL_RCSID(_n, _s)  /* nothing */
#else
#define __KERNEL_RCSID(_n, _s)  RCSID(_s)
#endif

#ifdef __ELF__
#define WEAK_ALIAS(alias,sym)                                           \
        .weak alias;                                                    \
        alias = sym
#endif
/*
 * STRONG_ALIAS: create a strong alias.
 */
#define STRONG_ALIAS(alias,sym)                                         \
        .globl alias;                                                   \
        alias = sym

#ifdef __STDC__
#define WARN_REFERENCES(sym,msg)                                        \
        .pushsection .gnu.warning. ## sym;                              \
        .ascii msg;                                                     \
        .popsection
#else
#define WARN_REFERENCES(sym,msg)                                        \
        .pushsection .gnu.warning./**/sym;                              \
        .ascii msg;                                                     \
        .popsection
#endif /* __STDC__ */

#endif /* !_I386_ASM_H_ */