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Annotation of sys/arch/amd64/include/asm.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: asm.h,v 1.2 2005/12/13 00:18:19 jsg Exp $     */
        !             2: /*     $NetBSD: asm.h,v 1.2 2003/05/02 18:05:47 yamt Exp $     */
        !             3:
        !             4: /*-
        !             5:  * Copyright (c) 1990 The Regents of the University of California.
        !             6:  * All rights reserved.
        !             7:  *
        !             8:  * This code is derived from software contributed to Berkeley by
        !             9:  * William Jolitz.
        !            10:  *
        !            11:  * Redistribution and use in source and binary forms, with or without
        !            12:  * modification, are permitted provided that the following conditions
        !            13:  * are met:
        !            14:  * 1. Redistributions of source code must retain the above copyright
        !            15:  *    notice, this list of conditions and the following disclaimer.
        !            16:  * 2. Redistributions in binary form must reproduce the above copyright
        !            17:  *    notice, this list of conditions and the following disclaimer in the
        !            18:  *    documentation and/or other materials provided with the distribution.
        !            19:  * 3. Neither the name of the University nor the names of its contributors
        !            20:  *    may be used to endorse or promote products derived from this software
        !            21:  *    without specific prior written permission.
        !            22:  *
        !            23:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            24:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            25:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            26:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            27:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            28:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            29:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            30:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            31:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            32:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            33:  * SUCH DAMAGE.
        !            34:  *
        !            35:  *     @(#)asm.h       5.5 (Berkeley) 5/7/91
        !            36:  */
        !            37:
        !            38: #ifndef _AMD64_ASM_H_
        !            39: #define _AMD64_ASM_H_
        !            40:
        !            41: #ifdef PIC
        !            42: #define PIC_PLT(x)     x@PLT
        !            43: #define PIC_GOT(x)     x@GOTPCREL(%rip)
        !            44: #else
        !            45: #define PIC_PLT(x)     x
        !            46: #define PIC_GOT(x)     x
        !            47: #endif
        !            48:
        !            49: # define _C_LABEL(x)   x
        !            50: #define        _ASM_LABEL(x)   x
        !            51:
        !            52: #define CVAROFF(x,y)           (_C_LABEL(x)+y)(%rip)
        !            53:
        !            54: #ifdef __STDC__
        !            55: # define __CONCAT(x,y) x ## y
        !            56: # define __STRING(x)   #x
        !            57: #else
        !            58: # define __CONCAT(x,y) x/**/y
        !            59: # define __STRING(x)   "x"
        !            60: #endif
        !            61:
        !            62: /* let kernels and others override entrypoint alignment */
        !            63: #ifndef _ALIGN_TEXT
        !            64: #define _ALIGN_TEXT .align 16, 0x90
        !            65: #endif
        !            66:
        !            67: #define _ENTRY(x) \
        !            68:        .text; _ALIGN_TEXT; .globl x; .type x,@function; x:
        !            69:
        !            70: #ifdef _KERNEL
        !            71: /* XXX Can't use __CONCAT() here, as it would be evaluated incorrectly. */
        !            72: #ifdef __STDC__
        !            73: #define        IDTVEC(name) \
        !            74:        .text; ALIGN_TEXT; .globl X ## name; .type X ## name,@function; X ## name:
        !            75: #else
        !            76: #define        IDTVEC(name) \
        !            77:        .text; ALIGN_TEXT; .globl X/**/name; .type X/**/name,@function; X/**/name:
        !            78: #endif /* __STDC__ */
        !            79: #endif /* _KERNEL */
        !            80:
        !            81: #ifdef __STDC__
        !            82: #define CPUVAR(off)    %gs:CPU_INFO_ ## off
        !            83: #else
        !            84: #define CPUVAR(off)     %gs:CPU_INFO_/**/off
        !            85: #endif
        !            86:
        !            87:
        !            88: #ifdef GPROF
        !            89: # define _PROF_PROLOGUE        \
        !            90:        pushq %rbp; leaq (%rsp),%rbp; call PIC_PLT(__mcount); popq %rbp
        !            91: #else
        !            92: # define _PROF_PROLOGUE
        !            93: #endif
        !            94:
        !            95: #define        ENTRY(y)        _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE
        !            96: #define        NENTRY(y)       _ENTRY(_C_LABEL(y))
        !            97: #define        ASENTRY(y)      _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
        !            98:
        !            99: #define        ASMSTR          .asciz
        !           100:
        !           101: #define RCSID(x)       .text; .asciz x
        !           102:
        !           103: #define        WEAK_ALIAS(alias,sym)                                           \
        !           104:        .weak alias;                                                    \
        !           105:        alias = sym
        !           106:
        !           107: /* XXXfvdl do not use stabs here */
        !           108: #ifdef __STDC__
        !           109: #define        WARN_REFERENCES(sym,msg)                                        \
        !           110:        .stabs msg ## ,30,0,0,0 ;                                       \
        !           111:        .stabs __STRING(_C_LABEL(sym)) ## ,1,0,0,0
        !           112: #else
        !           113: #define        WARN_REFERENCES(sym,msg)                                        \
        !           114:        .stabs msg,30,0,0,0 ;                                           \
        !           115:        .stabs __STRING(sym),1,0,0,0
        !           116: #endif /* __STDC__ */
        !           117:
        !           118: #endif /* !_AMD64_ASM_H_ */