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2aebb6cefe
in r7 and use ip to store the old version of r7 as it is not guaranteed to be kept when calling a subroutine. The kernel will preserve the register across system calls.
83 lines
2.7 KiB
C
83 lines
2.7 KiB
C
/* $NetBSD: SYS.h,v 1.8 2003/08/07 16:42:02 agc Exp $ */
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* 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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* William Jolitz.
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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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* from: @(#)SYS.h 5.5 (Berkeley) 5/7/91
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* $FreeBSD$
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*/
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#include <machine/asm.h>
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#include <sys/syscall.h>
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#include <machine/swi.h>
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#ifdef __ARM_EABI__
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#define SYSTRAP(x) \
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mov ip, r7; \
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ldr r7, =SYS_ ## x; \
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swi 0; \
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mov r7, ip
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#else
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#define SYSTRAP(x) swi 0 | SYS_ ## x
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#endif
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#define CERROR _C_LABEL(cerror)
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#define CURBRK _C_LABEL(curbrk)
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#define _SYSCALL_NOERROR(x) \
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ENTRY(__CONCAT(__sys_, x)); \
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.weak _C_LABEL(x); \
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.set _C_LABEL(x), _C_LABEL(__CONCAT(__sys_,x)); \
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.weak _C_LABEL(__CONCAT(_,x)); \
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.set _C_LABEL(__CONCAT(_,x)),_C_LABEL(__CONCAT(__sys_,x)); \
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SYSTRAP(x)
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#define _SYSCALL(x) \
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_SYSCALL_NOERROR(x); \
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bcs PIC_SYM(CERROR, PLT)
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#define SYSCALL(x) \
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_SYSCALL(x)
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#define PSEUDO(x) \
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ENTRY(__CONCAT(__sys_, x)); \
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.weak _C_LABEL(__CONCAT(_,x)); \
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.set _C_LABEL(__CONCAT(_,x)),_C_LABEL(__CONCAT(__sys_,x)); \
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SYSTRAP(x); \
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bcs PIC_SYM(CERROR, PLT); \
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RET
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#define RSYSCALL(x) \
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_SYSCALL(x); \
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RET
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.globl CERROR
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