source: rtems/cpukit/score/cpu/or32/rtems/asm.h @ 7f70d1b7

4.104.114.84.95
Last change on this file since 7f70d1b7 was 7f70d1b7, checked in by Ralf Corsepius <ralf.corsepius@…>, on Jan 28, 2005 at 3:56:09 PM

New header guard.

  • Property mode set to 100644
File size: 2.2 KB
Line 
1/**
2 * @file rtems/asm.h
3 *
4 *  This include file attempts to address the problems
5 *  caused by incompatible flavors of assemblers and
6 *  toolsets.  It primarily addresses variations in the
7 *  use of leading underscores on symbols and the requirement
8 *  that register names be preceded by a %.
9 */
10
11/*
12 *  NOTE: The spacing in the use of these macros
13 *        is critical to them working as advertised.
14 *
15 *  COPYRIGHT:
16 *
17 *  This file is based on similar code found in newlib available
18 *  from ftp.cygnus.com.  The file which was used had no copyright
19 *  notice.  This file is freely distributable as long as the source
20 *  of the file is noted.  This file is:
21 *
22 *  COPYRIGHT (c) 1994-1997.
23 *  On-Line Applications Research Corporation (OAR).
24 *
25 *  $Id$
26 */
27
28#ifndef _RTEMS_ASM_H
29#define _RTEMS_ASM_H
30
31/*
32 *  Indicate we are in an assembly file and get the basic CPU definitions.
33 */
34
35#ifndef ASM
36#define ASM
37#endif
38#include <rtems/score/targopts.h>
39#include <rtems/score/or32.h>
40
41/*
42 *  Recent versions of GNU cpp define variables which indicate the
43 *  need for underscores and percents.  If not using GNU cpp or
44 *  the version does not support this, then you will obviously
45 *  have to define these as appropriate.
46 */
47
48#ifndef __USER_LABEL_PREFIX__
49#define __USER_LABEL_PREFIX__ _
50#endif
51
52#ifndef __REGISTER_PREFIX__
53#define __REGISTER_PREFIX__
54#endif
55
56/* ANSI concatenation macros.  */
57
58#define CONCAT1(a, b) CONCAT2(a, b)
59#define CONCAT2(a, b) a ## b
60
61/* Use the right prefix for global labels.  */
62
63#define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x)
64
65/* Use the right prefix for registers.  */
66
67#define REG(x) CONCAT1 (__REGISTER_PREFIX__, x)
68
69/*
70 *  define macros for all of the registers on this CPU
71 *
72 *  EXAMPLE:     #define d0 REG (d0)
73 */
74
75/*
76 *  Define macros to handle section beginning and ends.
77 */
78
79
80#define BEGIN_CODE_DCL .text
81#define END_CODE_DCL
82#define BEGIN_DATA_DCL .data
83#define END_DATA_DCL
84#define BEGIN_CODE .text
85#define END_CODE
86#define BEGIN_DATA
87#define END_DATA
88#define BEGIN_BSS
89#define END_BSS
90#define END
91
92/*
93 *  Following must be tailor for a particular flavor of the C compiler.
94 *  They may need to put underscores in front of the symbols.
95 */
96
97#define PUBLIC(sym) .global SYM (sym)
98#define EXTERN(sym) .global SYM (sym)
99
100#endif
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