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/*
Copyright (c) 2011 Red Hat Incorporated.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
The name of Red Hat Incorporated may not be used to endorse
or promote products derived from this software without specific
prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL RED HAT INCORPORATED BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "syscall.h"
#include "vregs.h"
#define SYS__exit SYS_exit
.macro syscall_body number
/* The RL78 doesn't really have an "interrupt" upcode, just
BRK, which we emulate exactly. We use the STOP opcode,
which is a breakpoint in the simulator. */
mov A, #\number
stop
ret
.endm
.macro do_syscall name number
__\name:
.global __\name
_\name:
.weak _\name
syscall_body \number
.endm
.macro syscall_returns name number
__\name:
.global __\name
_\name:
.weak _\name
mov r8, #\number
ret
.endm
#define S(name) do_syscall name, SYS_##name
#define SYSCALL(number) syscall_body number
#define ERR(name) syscall_returns name, -1
#define OK(name) syscall_returns name, 0
#define RET(name,val) syscall_returns name, val
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