ec56d65061
- Add a new <machine/abi.h> header to hold constants shared between C and assembly such as CALLFRAME_SZ. - Add a new STACK_ALIGN constant to <machine/abi.h> and use it to replace hardcoded constants in the kernel and makecontext(). As a result of this, ensure the stack pointer on N32 and N64 is 16-byte aligned for N32 and N64 after exec(), after pthread_create(), and when sending signals rather than 8-byte aligned. Reviewed by: jmallett Sponsored by: DARPA / AFRL Differential Revision: https://reviews.freebsd.org/D13875
96 lines
3.4 KiB
C
96 lines
3.4 KiB
C
/* $NetBSD: asm.h,v 1.29 2000/12/14 21:29:51 jeffs Exp $ */
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/*
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Ralph Campbell.
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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. 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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* @(#)machAsmDefs.h 8.1 (Berkeley) 6/10/93
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* JNPR: asm.h,v 1.10 2007/08/09 11:23:32 katta
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* $FreeBSD$
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*/
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/*
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* machAsmDefs.h --
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*
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* Macros used when writing assembler programs.
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*
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* Copyright (C) 1989 Digital Equipment Corporation.
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* Permission to use, copy, modify, and distribute this software and
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* its documentation for any purpose and without fee is hereby granted,
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* provided that the above copyright notice appears in all copies.
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* Digital Equipment Corporation makes no representations about the
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* suitability of this software for any purpose. It is provided "as is"
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* without express or implied warranty.
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*
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* from: Header: /sprite/src/kernel/mach/ds3100.md/RCS/machAsmDefs.h,
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* v 1.2 89/08/15 18:28:24 rab Exp SPRITE (DECWRL)
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*/
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#ifndef _MACHINE_ABI_H_
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#define _MACHINE_ABI_H_
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#if defined(__mips_o32)
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#define SZREG 4
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#else
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#define SZREG 8
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#endif
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#if defined(__mips_o32) || defined(__mips_o64)
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#define STACK_ALIGN 8
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#else
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#define STACK_ALIGN 16
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#endif
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/*
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* standard callframe {
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* register_t cf_pad[N]; o32/64 (N=0), n32 (N=1) n64 (N=1)
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* register_t cf_args[4]; arg0 - arg3 (only on o32 and o64)
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* register_t cf_gp; global pointer (only on n32 and n64)
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* register_t cf_sp; frame pointer
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* register_t cf_ra; return address
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* };
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*/
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#if defined(__mips_o32) || defined(__mips_o64)
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#define CALLFRAME_SIZ (SZREG * (4 + 2))
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#define CALLFRAME_S0 0
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#elif defined(__mips_n32) || defined(__mips_n64)
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#define CALLFRAME_SIZ (SZREG * 4)
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#define CALLFRAME_S0 (CALLFRAME_SIZ - 4 * SZREG)
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#endif
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#ifndef _KERNEL
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#define CALLFRAME_GP (CALLFRAME_SIZ - 3 * SZREG)
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#endif
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#define CALLFRAME_SP (CALLFRAME_SIZ - 2 * SZREG)
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#define CALLFRAME_RA (CALLFRAME_SIZ - 1 * SZREG)
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#endif /* !_MACHINE_ABI_H_ */
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