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_ */
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