123 lines
4.2 KiB
C
123 lines
4.2 KiB
C
/* $NetBSD: asm.h,v 1.10 1999/02/24 16:02:19 chs Exp $ */
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/*
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* Copyright (c) 1994 Allen Briggs
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* All rights reserved.
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*
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* Gleaned from locore.s and sun3 asm.h which had the following copyrights:
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* locore.s:
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1982, 1990 The Regents of the University of California.
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* sun3/include/asm.h:
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* Copyright (c) 1993 Adam Glass
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* Copyright (c) 1990 The Regents of the University of California.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _ASM_H_
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#define _ASM_H_
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#ifdef __ELF__
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#define _C_LABEL(name) name
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#else
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#ifdef __STDC__
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#define _C_LABEL(name) _ ## name
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#else
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#define _C_LABEL(name) _/**/name
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#endif
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#endif
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#define _ASM_LABEL(name) name
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#ifdef PIC
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/*
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* PIC_PROLOGUE() is akin to the compiler generated function prologue for
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* PIC code. It leaves the address of the Global Offset Table in DEST,
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* clobbering register TMP in the process. Using the temporary enables us
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* to work without a stack frame (doing so requires saving %o7) .
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*/
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#define PIC_PROLOGUE(dest,tmp) \
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mov %o7,tmp; 3: call 4f; nop; 4: \
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sethi %hi(_C_LABEL(_GLOBAL_OFFSET_TABLE_)-(3b-.)),dest; \
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or dest,%lo(_C_LABEL(_GLOBAL_OFFSET_TABLE_)-(3b-.)),dest; \
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add dest,%o7,dest; mov tmp,%o7
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/*
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* PICCY_SET() does the equivalent of a `set var, %dest' instruction in
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* a PIC-like way, but without involving the Global Offset Table. This
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* only works for VARs defined in the same file *and* in the text segment.
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*/
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#define PICCY_SET(var,dest,tmp) \
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mov %o7,tmp; 3: call 4f; nop; 4: \
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add %o7,(var-3b),dest; mov tmp,%o7
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#else
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#define PIC_PROLOGUE(dest,tmp)
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#define PICCY_OFFSET(var,dest,tmp)
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#endif
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#define FTYPE(x) .type x,@function
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#define OTYPE(x) .type x,@object
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#define _ENTRY(name) \
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.align 4; .globl name; .proc 1; FTYPE(name); name:
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#ifdef GPROF
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#define _PROF_PROLOGUE \
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.data; .align 4; 1: .long 0; \
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.text; save %sp,-96,%sp; sethi %hi(1b),%o0; call mcount; \
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or %o0,%lo(1b),%o0; restore
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#else
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#define _PROF_PROLOGUE
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#endif
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#define ENTRY(name) _ENTRY(_C_LABEL(name)); _PROF_PROLOGUE
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#define ASENTRY(name) _ENTRY(_ASM_LABEL(name)); _PROF_PROLOGUE
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#define FUNC(name) ASENTRY(name)
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#define RODATA(name) .align 4; .text; .globl _C_LABEL(name); \
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OTYPE(_C_LABEL(name)); _C_LABEL(name):
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#define ASMSTR .asciz
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#define RCSID(name) .asciz name
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#ifdef __STDC__
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#define __STRING(x) #x
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#define WARN_REFERENCES(sym,msg) \
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.stabs msg ## ,30,0,0,0 ; \
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.stabs __STRING(_ ## sym) ## ,1,0,0,0
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#else
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#define __STRING(x) "x"
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#define WARN_REFERENCES(sym,msg) \
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.stabs msg,30,0,0,0 ; \
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.stabs __STRING(_/**/sym),1,0,0,0
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#endif /* __STDC__ */
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#endif /* _ASM_H_ */
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