d137b0e8ba
to call mcount(). This is needed because the ``link a6,#0'' insn used trips up gcc's ANSI preprocessor (A # in a function-type macro must be followed by a macro argument). _PROF_PROLOG is also used in the i386 asm.h. Solaris' asm_linkage.h has a MCOUNT macro similar to _PROF_PROLOG except it expands to different code sequences based on whether a function is being compiled with "prof" or "gprof" instrumentation. I also discovered that the m68k ALTENTRY is very different than the implementation used by other NetBSD ports. Usually ALTENTRY simply provides an alternate function entry point. The m68k version takes a second argument and jumps inside the second function when profiling is enabled. The m68k behavior is similar to the ENTRY2 macro found in solaris. Providing ENTRY2 and changing all the code that uses ALTENTRY to use it would be a desirable change.
94 lines
3.3 KiB
C
94 lines
3.3 KiB
C
/* $NetBSD: asm.h,v 1.11 1996/09/24 00:05:55 jtc 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 __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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#define _ASM_LABEL(name) name
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#ifndef _KERNEL
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#define _ENTRY(name) \
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.text; .even; .globl name; .type name,@function; name:
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#else
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#define _ENTRY(name) \
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.text; .even; .globl name; name:
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#endif
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#ifdef PROF
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#define _PROF_PROLOG link a6,#0; jbsr mcount; unlk a6
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#else
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#define _PROF_PROLOG
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#endif
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#define ENTRY(name) _ENTRY(_C_LABEL(name)) _PROF_PROLOG
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#define ASENTRY(name) _ENTRY(_ASM_LABEL(name)) _PROF_PROLOG
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/*
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* The m68k ALTENTRY macro is very different than the traditional
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* implementation used by other NetBSD ports. Usually ALTENTRY
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* simply provides an alternate function entry point. The m68k
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* definition takes a second argument and jumps inside the second
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* function when profiling is enabled.
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*
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* The m68k behavior is similar to the ENTRY2 macro found in
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* solaris' asm_linkage.h.
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*
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* Providing ENTRY2 and changing all the code that uses ALTENTRY
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* to use it would be a desirable change.
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*/
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#ifdef PROF
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#define ALTENTRY(name, rname) ENTRY(name); jra rname+12
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#else
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#define ALTENTRY(name, rname) _ENTRY(_C_LABEL(name))
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#endif
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#define RCSID(x) .text; .asciz x
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#endif /* _ASM_H_ */
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