210 lines
4.8 KiB
C
210 lines
4.8 KiB
C
/* $NetBSD: asm.h,v 1.10 1997/05/08 13:44:11 matthias Exp $ */
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/*
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* Mach Operating System
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* Copyright (c) 1992 Carnegie Mellon University
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* Copyright (c) 1992 Helsinki University of Technology
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* All Rights Reserved.
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON AND HELSINKI UNIVERSITY OF TECHNOLOGY ALLOW FREE USE
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* OF THIS SOFTWARE IN ITS "AS IS" CONDITION. CARNEGIE MELLON AND
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* HELSINKI UNIVERSITY OF TECHNOLOGY DISCLAIM ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie Mellon
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* the rights to redistribute these changes.
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*/
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/*
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* File: asm.h
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* Author: Johannes Helander, Tero Kivinen, Tatu Ylonen
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* Modified by Phil Nelson for NetBSD.
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* Modified by Matthias Pfaller for PIC.
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* Helsinki University of Technology 1992.
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*/
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#ifndef _MACHINE_ASM_H_
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#define _MACHINE_ASM_H_
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#ifdef __STDC__
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#define CAT(a, b) a ## b
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#else
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#define CAT(a, b) a/**/b
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#endif
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#define _C_LABEL(name) CAT(_,name)
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#define _ASM_LABEL(name) name
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/* let kernels and others override entrypoint alignment */
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#ifndef _ALIGN_TEXT
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# define _ALIGN_TEXT .align 2,0xa2
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#endif
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#ifndef _ALIGN_DATA
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# define _ALIGN_DATA .align 2
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#endif
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#define S_ARG0 4(sp)
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#define S_ARG1 8(sp)
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#define S_ARG2 12(sp)
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#define S_ARG3 16(sp)
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#define B_ARG0 8(fp)
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#define B_ARG1 12(fp)
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#define B_ARG2 16(fp)
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#define B_ARG3 20(fp)
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#ifdef PIC
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#define PIC_PROLOGUE \
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sprd sb,tos ; \
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addr _C_LABEL(_GLOBAL_OFFSET_TABLE_)(pc),r1; \
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lprd sb,r1
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#define PIC_EPILOGUE \
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lprd sb,tos
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#define PIC_GOT(name) 0(name(sb))
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#define PIC_S_ARG0 8(sp)
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#define PIC_S_ARG1 12(sp)
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#define PIC_S_ARG2 16(sp)
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#define PIC_S_ARG3 20(sp)
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#else
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#define PIC_PROLOGUE
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#define PIC_EPILOGUE
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#define PIC_GOT(name) name(pc)
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#define PIC_S_ARG0 4(sp)
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#define PIC_S_ARG1 8(sp)
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#define PIC_S_ARG2 12(sp)
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#define PIC_S_ARG3 16(sp)
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#endif
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#define _ENTRY(name) \
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.text ; \
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_ALIGN_TEXT ; \
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.globl name ; \
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.type name,@function ; \
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name:
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#ifdef GPROF
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# ifndef _SAVELIST
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# define _SAVELIST
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# endif
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# define _PROF_PROLOGUE \
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enter [_SAVELIST],0 ; \
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bsr _ASM_LABEL(mcount) ; \
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exit [_SAVELIST]
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#else
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# define _PROF_PROLOGUE
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#endif
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#define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE
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#define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
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#define ENTRY_NOPROFILE(name) _ENTRY(_C_LABEL(name))
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#define ASENTRY_NOPROFILE(name) _ENTRY(_ASM_LABEL(name))
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#define ALTENTRY(name, rname) \
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.globl _C_LABEL(name) ; \
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.type _C_LABEL(name),@function ; \
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.set _C_LABEL(name),_C_LABEL(rname)
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#define ASMSTR \
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.asciz
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#define RCSID(string) \
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.text ; \
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ASMSTR string
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/*
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* Global variables of whatever sort.
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*/
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#define GLOBAL(name) \
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.globl _C_LABEL(name) ; \
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_C_LABEL(name):
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#define ASGLOBAL(name) \
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.globl _ASM_LABEL(name) ; \
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_ASM_LABEL(name):
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/*
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* ...and local variables.
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*/
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#define LOCAL(name) \
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_C_LABEL(name):
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#define ASLOCAL(name) \
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_ASM_LABEL(name):
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/*
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* Items in the DATA segment.
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*/
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#define _DATA(name, pseudo, init) \
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.data ; \
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.globl name ; \
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.type name,@object ; \
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.size name,9f - name ; \
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name: pseudo init ; \
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9:
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#define DATA_D(name, init) _DATA(_C_LABEL(name), .long, init)
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#define DATA_W(name, init) _DATA(_C_LABEL(name), .word, init)
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#define DATA_B(name, init) _DATA(_C_LABEL(name), .byte, init)
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#define DATA_S(name, init) _DATA(_C_LABEL(name), .asciz, init)
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#define ASDATA_D(name, init) _DATA(_ASM_LABEL(name), .long, init)
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#define ASDATA_W(name, init) _DATA(_ASM_LABEL(name), .word, init)
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#define ASDATA_B(name, init) _DATA(_ASM_LABEL(name), .byte, init)
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#define ASDATA_S(name, init) _DATA(_ASM_LABEL(name), .asciz, init)
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/*
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* Items in the BSS segment.
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*/
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#define BSS(name, size) \
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.comm _C_LABEL(name),size
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#define ASBSS(name, size) \
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.comm _ASM_LABEL(name),size
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#ifdef _KERNEL
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/*
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* Shorthand for calling panic().
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* Note the side-effect: it uses up the 9: label, so be careful!
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*/
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#define PANIC(message) \
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addr 9f,tos ; \
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bsr _C_LABEL(panic) ; \
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9: .asciz message ; \
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.even
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/*
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* Shorthand for defining vectors for the vector table.
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*/
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#define VECTOR(name) \
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.long _C_LABEL(name)
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#define ASVECTOR(name) \
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.long _ASM_LABEL(name)
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#define VECTOR_UNUSED \
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.long 0
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#endif
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#endif
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