code.delx.au - gnu-emacs/blob - src/m/hp800.h

   1 /* machine description file for hp9000 series 800 machines.
   2    Copyright (C) 1987, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
   3                  2008  Free Software Foundation, Inc.
   4
   5 This file is part of GNU Emacs.
   6
   7 GNU Emacs is free software: you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation, either version 3 of the License, or
  10 (at your option) any later version.
  11
  12 GNU Emacs is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20
  21 /* The following line tells the configuration script what sort of
  22    operating system this machine is likely to run.
  23    USUAL-OPSYS="hpux"  */
  24
  25 /* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
  26    is the most significant byte.  */
  27
  28 #define WORDS_BIG_ENDIAN
  29
  30 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  31  * group of arguments and treat it as an array of the arguments.  */
  32
  33 #define NO_ARG_ARRAY
  34
  35 /* Use type int rather than a union, to represent Lisp_Object */
  36 /* This is desirable for most machines.  */
  37
  38 #define NO_UNION_TYPE
  39
  40 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  41    the bit field into an int.  In other words, if bit fields
  42    are always unsigned.
  43
  44    If you use NO_UNION_TYPE, this flag does not matter.  */
  45
  46 #define EXPLICIT_SIGN_EXTEND
  47
  48 \f
  49 /* Common definitions for HPUX and GNU/Linux.  */
  50
  51 #if defined (__hpux) || defined (GNU_LINUX)
  52
  53 /* Define CANNOT_DUMP on machines where unexec does not work.
  54    Then the function dump-emacs will not be defined
  55    and temacs will do (load "loadup") automatically unless told otherwise.  */
  56
  57 #undef CANNOT_DUMP
  58
  59 /* Define NO_REMAP if memory segmentation makes it not work well
  60    to change the boundary between the text section and data section
  61    when Emacs is dumped.  If you define this, the preloaded Lisp
  62    code will not be sharable; but that's better than failing completely.  */
  63
  64 #define NO_REMAP
  65
  66 #endif /* __hpux or GNU_LINUX */
  67 \f
  68 /* Stuff for just GNU/Linux.  */
  69
  70 #ifdef GNU_LINUX
  71
  72 /* Data type of load average, as read out of kmem.  */
  73
  74 #define LOAD_AVE_TYPE long
  75
  76 /* Convert that into an integer that is 100 for a load average of 1.0  */
  77
  78 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
  79
  80 #endif /* GNU_LINUX */
  81 \f
  82 /* Stuff for just HPUX.  */
  83
  84 #ifdef __hpux
  85
  86 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  87    pure and impure space as loaded can vary, and even their
  88    relative order cannot be relied on.
  89
  90    Otherwise Emacs assumes that text space precedes data space,
  91    numerically.  */
  92
  93 #define VIRT_ADDR_VARIES
  94 \f
  95 /* the data segment on this machine always starts at address 0x40000000. */
  96
  97 #define DATA_SEG_BITS 0x40000000
  98
  99 #define DATA_START    0x40000000
 100 #define TEXT_START    0x00000000
 101
 102 /* This machine requires completely different unexec code
 103    which lives in a separate file.  Specify the file name.  */
 104
 105 #define UNEXEC unexhp9k800.o
 106
 107 #define LIBS_MACHINE
 108 #define LIBS_DEBUG
 109
 110 /* Include the file bsdtty.h, since this machine has job control.  */
 111 #define NEED_BSDTTY
 112
 113 /* Data type of load average, as read out of kmem.  */
 114
 115 #define LOAD_AVE_TYPE double
 116
 117 /* Convert that into an integer that is 100 for a load average of 1.0  */
 118
 119 #define LOAD_AVE_CVT(x) ((int) (x * 100.0))
 120
 121 /* The symbol in the kernel where the load average is found
 122    is named _avenrun.  At this time there are two major flavors
 123    of hp-ux (there is the s800 and s300 (s200) flavors).  The
 124    differences are thusly moved to the corresponding machine description file.
 125 */
 126
 127 /* no underscore please */
 128 #define LDAV_SYMBOL "avenrun"
 129
 130 #if 0   /* Supposedly no longer true.  */
 131 /* In hpux, for unknown reasons, S_IFLNK is defined even though
 132    symbolic links do not exist.
 133    Make sure our conditionals based on S_IFLNK are not confused.
 134
 135    Here we assume that stat.h is included before config.h
 136    so that we can override it here.  */
 137
 138 #undef S_IFLNK
 139 #endif
 140
 141 /* On USG systems these have different names. */
 142
 143 #define index strchr
 144 #define rindex strrchr
 145
 146 #endif /* __hpux */
 147 \f
 148 /* Systems with GCC don't need to lose. */
 149 #ifdef __NetBSD__
 150 # ifdef __GNUC__
 151 #  define alloca __builtin_alloca
 152 #  define HAVE_ALLOCA
 153 # endif /* __GNUC__ */
 154 #endif /* __NetBSD__ */
 155
 156 /* arch-tag: 809436e6-1645-4b92-b40d-2de5d6e7227c
 157    (do not change this comment) */