67 lines
2.1 KiB
ArmAsm
67 lines
2.1 KiB
ArmAsm
/*-
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* Copyright (c) 2000 Peter Wemm <peter@FreeBSD.org>
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* All rights reserved.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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#include <machine/asm.h>
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__FBSDID("$FreeBSD$");
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#include "SYS.h"
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#include <sys/syscall.h>
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/* #include <machine/pal.h> */
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/*
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* This is pretty evil and based mostly on examples from other syscall
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* stubs and code that gcc generated. Correctness is uncertain, but it
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* seems to work quite happily.
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*/
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LEAF(rfork_thread, 1)
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br gp,L1 /* XXX profiling */
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L1:
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LDGP(pv)
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lda sp,-16(sp)
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stq ra,0(sp)
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mov a3,a5
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CALLSYS_ERROR(rfork)
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beq v0,$child
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addl v0,zero,v0
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ldq ra,0(sp)
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lda sp,16(sp)
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RET
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$child:
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mov a1,sp
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lda sp,-16(sp)
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stq zero,0(sp)
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mov a5,a0
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mov a2,t12
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jsr ra,(t12),0
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ldgp gp,0(ra)
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mov v0,a0
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#ifdef SYS_exit
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CALLSYS_NOERROR(exit)
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#else
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CALLSYS_NOERROR(sys_exit)
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#endif
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END(rfork_thread)
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