annotate src/m/hp800.h @ 400:a86b2b5e0111 r21-2-30

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date Mon, 13 Aug 2007 11:14:34 +0200
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1 /* machine description file for hp9000 series 800 machines.
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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 /* The following line tells the configuration script what sort of
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24 operating system this machine is likely to run.
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25 USUAL-OPSYS="hpux" */
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26
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27 /* Now define a symbol for the cpu type, if your compiler
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28 does not define it automatically:
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29 Ones defined so far include vax, m68000, ns16000, pyramid,
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30 orion, tahoe, APOLLO and many others */
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31 #ifndef hp9000s800
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32 # define hp9000s800
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33 #endif
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34
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35
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36 #ifdef __hpux
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37 /* Now define a symbol for the cpu type, if your compiler
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38 does not define it automatically:
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39 Ones defined so far include vax, m68000, ns16000, pyramid,
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40 orion, tahoe, APOLLO and many others */
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41 #ifndef hp9000s800
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42 # define hp9000s800
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43 #endif
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44
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45 /* Data type of load average, as read out of kmem. */
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46
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47 #define LOAD_AVE_TYPE double
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48
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49 /* Convert that into an integer that is 100 for a load average of 1.0 */
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50
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51 #define LOAD_AVE_CVT(x) ((int) (x * 100.0))
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52
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53
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54 /* Define CANNOT_DUMP on machines where unexec does not work.
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55 Then the function dump-emacs will not be defined
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56 and temacs will do (load "loadup") automatically unless told otherwise. */
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57
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58 #undef CANNOT_DUMP
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59
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60 /* Define VIRT_ADDR_VARIES if the virtual addresses of
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61 pure and impure space as loaded can vary, and even their
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62 relative order cannot be relied on.
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63
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64 Otherwise Emacs assumes that text space precedes data space,
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65 numerically. */
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66
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67 #define VIRT_ADDR_VARIES
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68
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69 /* Define C_ALLOCA if this machine does not support a true alloca
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70 and the one written in C should be used instead.
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71 Define HAVE_ALLOCA to say that the system provides a properly
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72 working alloca function and it should be used.
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73 Define neither one if an assembler-language alloca
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74 in the file alloca.s should be used. */
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75
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76 /* lemacs change: define HAVE_ALLOCA if gcc is being used */
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77 #ifdef __GNUC__
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78 #define HAVE_ALLOCA
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79 #else
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80 #define C_ALLOCA
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81 #endif
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82
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83 /* the data segment on this machine always starts at address 0x40000000. */
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84
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85 #ifdef DATA_START
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86 #undef DATA_START
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87 #endif
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88 #ifdef TEXT_START
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89 #undef TEXT_START
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90 #endif
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91
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92 #define DATA_START 0x40000000
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93 #define TEXT_START 0x00000000
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94
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95 #define STACK_DIRECTION 1
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96
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97 /* Define NO_REMAP if memory segmentation makes it not work well
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98 to change the boundary between the text section and data section
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99 when Emacs is dumped. If you define this, the preloaded Lisp
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100 code will not be sharable; but that's better than failing completely. */
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101
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102 #define NO_REMAP
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103
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104 /* This machine requires completely different unexec code
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105 which lives in a separate file. Specify the file name. */
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106
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107 #define UNEXEC "unexhp9k800.o"
0
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108
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109 #define LIBS_MACHINE
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110 #define LIBS_DEBUG
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111
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112 /* Include the file bsdtty.h, since this machine has job control. */
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113 #define NEED_BSDTTY
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114
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115 /* The symbol in the kernel where the load average is found
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116 is named _avenrun. At this time there are two major flavors
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117 of hp-ux (there is the s800 and s300 (s200) flavors). The
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118 differences are thusly moved to the corresponding machine description file.
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119 */
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120
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121 /* no underscore please */
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122 #define LDAV_SYMBOL "avenrun"
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123
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124 #if 0 /* Supposedly no longer true. */
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125 /* In hpux, for unknown reasons, S_IFLNK is defined even though
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126 symbolic links do not exist.
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127 Make sure our conditionals based on S_IFLNK are not confused.
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128
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129 Here we assume that stat.h is included before config.h
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130 so that we can override it here. */
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131
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132 #undef S_IFLNK
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133 #endif
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134
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135 #endif /* __hpux */