/*      $NetBSD: asm.h,v 1.24 2025/01/05 14:30:37 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 _AMD64_ASM_H_
#define _AMD64_ASM_H_

#ifdef __x86_64__

#ifdef __PIC__
#define PIC_PLT(x)      x@PLT
#define PIC_GOT(x)      x@GOTPCREL(%rip)
#else
#define PIC_PLT(x)      x
#define PIC_GOT(x)      x
#endif

#define _C_LABEL(x)     x
#define _ASM_LABEL(x)   x

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

#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 */
#ifndef _ALIGN_TEXT
# ifdef _STANDALONE
#  define _ALIGN_TEXT .align 4
# else
#  define _ALIGN_TEXT .align 16
# endif
#endif

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

#ifdef _KERNEL
/* XXX Can't use __CONCAT() here, as it would be evaluated incorrectly. */
#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 /* _KERNEL */

#ifdef __STDC__
#define CPUVAR(off)     %gs:CPU_INFO_ ## off
#else
#define CPUVAR(off)     %gs:CPU_INFO_/**/off
#endif


#ifdef GPROF
# define _PROF_PROLOGUE \
       pushq %rbp; leaq (%rsp),%rbp; call PIC_PLT(__mcount); popq %rbp
#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

#define _IDENTSTR(x)    .pushsection ".ident","MS",@progbits,1;         \
                       x;                                              \
                       .popsection
#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

#define WEAK_ALIAS(alias,sym)                                           \
       .weak alias;                                                    \
       alias = sym

/*
* 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__ */

#else   /*      __x86_64__      */

#include <i386/asm.h>

#endif  /*      __x86_64__      */

#endif /* !_AMD64_ASM_H_ */

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