source: rtems/cpukit/score/cpu/i386/rtems/asm.h @ 30f7ff9

4.104.114.84.95
Last change on this file since 30f7ff9 was 30f7ff9, checked in by Joel Sherrill <joel.sherrill@…>, on Oct 5, 1999 at 7:11:57 PM

Removed targets and configurations that are no longer functional
and not likely to become so. Comments on each configuration
are below.

+ Force CPU386 - This BSP was developed as part of the initial

port of RTEMS to the i386. This board has been unavailable
for a long time now.

+ GO32 - This BSP and some CPU code supported djgpp v1.x. This

version is now quite old. No one has stepped forward to
update the code to v2.x which may be technically impossible
anyway. More importantly, go32 has been superceded by the pc386 BSP.

  • Property mode set to 100644
File size: 2.9 KB
Line 
1/*  asm.h
2 *
3 *  This include file attempts to address the problems
4 *  caused by incompatible flavors of assemblers and
5 *  toolsets.  It primarily addresses variations in the
6 *  use of leading underscores on symbols and the requirement
7 *  that register names be preceded by a %.
8 *
9 *
10 *  NOTE: The spacing in the use of these macros
11 *        is critical to them working as advertised.
12 *
13 *  COPYRIGHT:
14 *
15 *  This file is based on similar code found in newlib available
16 *  from ftp.cygnus.com.  The file which was used had no copyright
17 *  notice.  This file is freely distributable as long as the source
18 *  of the file is noted.  This file is:
19 *
20 *  COPYRIGHT (c) 1994-1997.
21 *  On-Line Applications Research Corporation (OAR).
22 *
23 *  $Id$
24 */
25
26#ifndef __i386_ASM_h
27#define __i386_ASM_h
28
29/*
30 *  Indicate we are in an assembly file and get the basic CPU definitions.
31 */
32
33#ifndef ASM
34#define ASM
35#endif
36#include <rtems/score/targopts.h>
37#include <rtems/score/i386.h>
38
39/*
40 *  Recent versions of GNU cpp define variables which indicate the
41 *  need for underscores and percents.  If not using GNU cpp or
42 *  the version does not support this, then you will obviously
43 *  have to define these as appropriate.
44 */
45
46/*
47 *  Looks like there is a bug in gcc 2.6.2 where this is not
48 *  defined correctly when configured as i386-coff and
49 *  i386-aout.
50 */
51
52#undef __REGISTER_PREFIX__
53#define __REGISTER_PREFIX__ %
54
55/*
56#ifndef __REGISTER_PREFIX__
57#define __REGISTER_PREFIX__
58#endif
59*/
60
61/* ANSI concatenation macros.  */
62
63#define CONCAT1(a, b) CONCAT2(a, b)
64#define CONCAT2(a, b) a ## b
65
66/* Use the right prefix for global labels.  */
67
68#define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x)
69
70/* Use the right prefix for registers.  */
71
72#define REG(x) CONCAT1 (__REGISTER_PREFIX__, x)
73
74#define eax REG (eax)
75#define ebx REG (ebx)
76#define ecx REG (ecx)
77#define edx REG (edx)
78#define esi REG (esi)
79#define edi REG (edi)
80#define esp REG (esp)
81#define ebp REG (ebp)
82#define cr0 REG (cr0)
83
84#define ax REG (ax)
85#define bx REG (bx)
86#define cx REG (cx)
87#define dx REG (dx)
88#define si REG (si)
89#define di REG (di)
90#define sp REG (sp)
91#define bp REG (bp)
92
93#define ah REG (ah)
94#define bh REG (bh)
95#define ch REG (ch)
96#define dh REG (dh)
97
98#define al REG (al)
99#define bl REG (bl)
100#define cl REG (cl)
101#define dl REG (dl)
102
103#define cs REG (cs)
104#define ds REG (ds)
105#define es REG (es)
106#define fs REG (fs)
107#define gs REG (gs)
108#define ss REG (ss)
109
110/*
111 *  Define macros to handle section beginning and ends.
112 */
113
114
115#define BEGIN_CODE_DCL .text
116#define END_CODE_DCL
117#define BEGIN_DATA_DCL .data
118#define END_DATA_DCL
119#define BEGIN_CODE .text
120#define END_CODE
121#define BEGIN_DATA .data
122#define END_DATA
123#define BEGIN_BSS .bss
124#define END_BSS
125#define END
126
127/*
128 *  Following must be tailor for a particular flavor of the C compiler.
129 *  They may need to put underscores in front of the symbols.
130 */
131
132#define PUBLIC(sym) .globl SYM (sym)
133#define EXTERN(sym) .globl SYM (sym)
134
135#endif
136/* end of include file */
137
138
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