source: trunk/libs/newlib/src/libgloss/rl78/rl78-sys.h @ 546

Last change on this file since 546 was 444, checked in by satin@…, 6 years ago

add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc

File size: 2.2 KB
Line 
1/*
2
3Copyright (c) 2011 Red Hat Incorporated.
4All rights reserved.
5
6Redistribution and use in source and binary forms, with or without
7modification, are permitted provided that the following conditions are met:
8
9    Redistributions of source code must retain the above copyright
10    notice, this list of conditions and the following disclaimer.
11
12    Redistributions in binary form must reproduce the above copyright
13    notice, this list of conditions and the following disclaimer in the
14    documentation and/or other materials provided with the distribution.
15
16    The name of Red Hat Incorporated may not be used to endorse
17    or promote products derived from this software without specific
18    prior written permission.
19
20THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
23DISCLAIMED.  IN NO EVENT SHALL RED HAT INCORPORATED BE LIABLE FOR ANY
24DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
25(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
26LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
27ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
29SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30
31*/
32
33#include "syscall.h"
34#include "vregs.h"
35
36#define SYS__exit  SYS_exit
37
38        .macro syscall_body  number
39         /* The RL78 doesn't really have an "interrupt" upcode, just
40            BRK, which we emulate exactly.  We use the STOP opcode,
41            which is a breakpoint in the simulator.  */
42        mov     A, #\number
43        stop
44        ret
45        .endm
46     
47        .macro do_syscall  name number
48__\name:
49        .global __\name
50_\name:
51        .weak _\name
52        syscall_body \number
53        .endm
54
55   .macro       syscall_returns name number
56__\name:
57        .global __\name
58_\name:
59        .weak _\name
60        mov     r8, #\number
61        ret
62        .endm
63
64#define S(name)         do_syscall      name, SYS_##name
65#define SYSCALL(number) syscall_body    number
66#define ERR(name)       syscall_returns name, -1
67#define OK(name)        syscall_returns name, 0
68#define RET(name,val)   syscall_returns name, val
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