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359
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1 /* machine description file for Iris-4D machines. Use with s/irix*.h.
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2 Copyright (C) 1987 Free Software Foundation, Inc.
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3
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4 This file is part of GNU Emacs.
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5
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6 GNU Emacs is free software; you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 2, or (at your option)
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9 any later version.
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10
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11 GNU Emacs is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with XEmacs; see the file COPYING. If not, write to
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18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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19 Boston, MA 02111-1307, USA. */
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20
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21 /* Synched up with: FSF 19.31. */
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22
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23 /* Define WORD_MACHINE if addresses and such have
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24 * to be corrected before they can be used as byte counts. */
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25
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26 #undef WORD_MACHINE
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27
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28 /* Now define a symbol for the cpu type, if your compiler
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29 does not define it automatically:
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30 Ones defined so far include vax, m68000, ns16000, pyramid,
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31 orion, tahoe, APOLLO and many others */
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32
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33 #ifndef mips
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34 #define mips
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35 #endif
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36
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37 #ifndef IRIS_4D
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38 #define IRIS_4D
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39 #endif
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40
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41 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
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42 the bit field into an int. In other words, if bit fields
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43 are always unsigned.
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44
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45 If you use NO_UNION_TYPE, this flag does not matter. */
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46
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47 #define EXPLICIT_SIGN_EXTEND
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48
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49 /* jg@genmagic.genmagic.com (John Giannandrea) says this is unnecessary. */
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50 #if 0
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51 /* Data type of load average, as read out of kmem. */
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52
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53 #define LOAD_AVE_TYPE long /* This doesn't quite work on the 4D */
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54
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55 /* Convert that into an integer that is 100 for a load average of 1.0 */
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56
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57 #define LOAD_AVE_CVT(x) (int)(((double)(x)*100)/1024.0)
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58
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59 /* s-iris3-6.h uses /vmunix */
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60
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61 #undef KERNEL_FILE
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62 #define KERNEL_FILE "/unix"
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63 #endif
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64
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65 /* Define CANNOT_DUMP on machines where unexec does not work.
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66 Then the function dump-emacs will not be defined
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67 and temacs will do (load "loadup") automatically unless told otherwise. */
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68
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69 #undef CANNOT_DUMP
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70
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71 /* Define VIRT_ADDR_VARIES if the virtual addresses of
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72 pure and impure space as loaded can vary, and even their
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73 relative order cannot be relied on.
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74
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75 Otherwise Emacs assumes that text space precedes data space,
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76 numerically. */
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77
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78 /* #define VIRT_ADDR_VARIES */
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79
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80 /* Define C_ALLOCA if this machine does not support a true alloca
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81 and the one written in C should be used instead.
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82 Define HAVE_ALLOCA to say that the system provides a properly
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83 working alloca function and it should be used.
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84 Define neither one if an assembler-language alloca
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85 in the file alloca.s should be used. */
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86
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87 /* #define C_ALLOCA */ /* Sjoerd.Mullender@cwi.nl says no need. */
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88 /* #define HAVE_ALLOCA */
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89
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90 /* Define NO_REMAP if memory segmentation makes it not work well
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91 to change the boundary between the text section and data section
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92 when Emacs is dumped. If you define this, the preloaded Lisp
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93 code will not be sharable; but that's better than failing completely. */
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94
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95 #define NO_REMAP
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96
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97 /* This machine requires completely different unexec code
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98 which lives in a separate file. Specify the file name. */
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99
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100 #ifdef USG5_4
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101 #undef UNEXEC
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102 #define UNEXEC "unexelfsgi.o"
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103 #else
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104 #define UNEXEC "unexmips.o"
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105 #endif
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106
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107 #define TEXT_START 0x400000
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108
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109 /*
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110 * DATA_SEG_BITS forces extra bits to be or'd in with any pointers which
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111 * were stored in a Lisp_Object (as Emacs uses fewer than 32 bits for
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112 * the value field of a LISP_OBJECT).
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113 */
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114
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115 #define DATA_START 0x10000000
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116 #define DATA_SEG_BITS 0x10000000
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117
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118 #undef LIBS_MACHINE
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119 /* -lsun in case using Yellow Pages for passwords. */
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120 #define LIBS_DEBUG
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121
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122 /* Define this if you have a fairly recent system,
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123 in which crt1.o and crt1.n should be used. */
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124 #define HAVE_CRTN
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125
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126 #ifndef USG5_4
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127 #ifdef HAVE_CRTN
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128 /* Must define START-FILES so that the linker can find /usr/lib/crt0.o. */
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129 #define START_FILES "pre-crt0.o /usr/lib/crt1.o"
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130 #define LIB_STANDARD "-lc /usr/lib/crtn.o"
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131 #else
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132 #define START_FILES "pre-crt0.o /usr/lib/crt0.o"
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133 /* The entry-point label (start of text segment) is `start', not `__start'. */
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134 #define DEFAULT_ENTRY_ADDRESS start
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135 #define LIB_STANDARD "-lc"
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136 #endif
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137 #endif
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138
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139 /* Use terminfo instead of termcap. */
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140
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141 #define TERMINFO
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142
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143 /* Letter to use in finding device name of first pty,
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144 if system supports pty's. 'a' means it is /dev/ptya0 */
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145
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146 #undef FIRST_PTY_LETTER
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147 #define FIRST_PTY_LETTER 'q'
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148
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149 /* Define STACK_DIRECTION for alloca.c */
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150
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151 #undef STACK_DIRECTION
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152 #define STACK_DIRECTION -1
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