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 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  36    the bit field into an int.  In other words, if bit fields
  37    are always unsigned.
  38
  39    This flag only matters if you use USE_LISP_UNION_TYPE.  */
  40
  41 #define EXPLICIT_SIGN_EXTEND
  42
  43 \f
  44 /* Common definitions for HPUX and GNU/Linux.  */
  45
  46 #if defined (__hpux) || defined (GNU_LINUX)
  47
  48 /* Define CANNOT_DUMP on machines where unexec does not work.
  49    Then the function dump-emacs will not be defined
  50    and temacs will do (load "loadup") automatically unless told otherwise.  */
  51
  52 #undef CANNOT_DUMP
  53
  54 /* Define NO_REMAP if memory segmentation makes it not work well
  55    to change the boundary between the text section and data section
  56    when Emacs is dumped.  If you define this, the preloaded Lisp
  57    code will not be sharable; but that's better than failing completely.  */
  58
  59 #define NO_REMAP
  60
  61 #endif /* __hpux or GNU_LINUX */
  62 \f
  63 /* Stuff for just GNU/Linux.  */
  64
  65 #ifdef GNU_LINUX
  66
  67 /* Data type of load average, as read out of kmem.  */
  68
  69 #define LOAD_AVE_TYPE long
  70
  71 /* Convert that into an integer that is 100 for a load average of 1.0  */
  72
  73 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
  74
  75 #endif /* GNU_LINUX */
  76 \f
  77 /* Stuff for just HPUX.  */
  78
  79 #ifdef __hpux
  80
  81 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  82    pure and impure space as loaded can vary, and even their
  83    relative order cannot be relied on.
  84
  85    Otherwise Emacs assumes that text space precedes data space,
  86    numerically.  */
  87
  88 #define VIRT_ADDR_VARIES
  89 \f
  90 /* the data segment on this machine always starts at address 0x40000000. */
  91
  92 #define DATA_SEG_BITS 0x40000000
  93
  94 #define DATA_START    0x40000000
  95 #define TEXT_START    0x00000000
  96
  97 /* This machine requires completely different unexec code
  98    which lives in a separate file.  Specify the file name.  */
  99
 100 #define UNEXEC unexhp9k800.o
 101
 102 #define LIBS_MACHINE
 103 #define LIBS_DEBUG
 104
 105 /* Include the file bsdtty.h, since this machine has job control.  */
 106 #define NEED_BSDTTY
 107
 108 /* Data type of load average, as read out of kmem.  */
 109
 110 #define LOAD_AVE_TYPE double
 111
 112 /* Convert that into an integer that is 100 for a load average of 1.0  */
 113
 114 #define LOAD_AVE_CVT(x) ((int) (x * 100.0))
 115
 116 /* The symbol in the kernel where the load average is found
 117    is named _avenrun.  At this time there are two major flavors
 118    of hp-ux (there is the s800 and s300 (s200) flavors).  The
 119    differences are thusly moved to the corresponding machine description file.
 120 */
 121
 122 /* no underscore please */
 123 #define LDAV_SYMBOL "avenrun"
 124
 125 /* On USG systems these have different names. */
 126
 127 #define index strchr
 128 #define rindex strrchr
 129
 130 #endif /* __hpux */
 131 \f
 132 /* Systems with GCC don't need to lose. */
 133 #ifdef __NetBSD__
 134 # ifdef __GNUC__
 135 #  define alloca __builtin_alloca
 136 #  define HAVE_ALLOCA
 137 # endif /* __GNUC__ */
 138 #endif /* __NetBSD__ */
 139
 140 /* arch-tag: 809436e6-1645-4b92-b40d-2de5d6e7227c
 141    (do not change this comment) */