src/m/sequent-ptx.h

   1 /* machine description file for SEQUENT machines running DYNIX/ptx
   2    Copyright (C) 1985, 1986 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Emacs.
   5
   6 GNU Emacs is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Emacs is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Emacs; see the file COPYING.  If not, write to
  18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21
  22 /* The following line tells the configuration script what sort of
  23    operating system this machine is likely to run.
  24    USUAL-OPSYS="ptx"  */
  25
  26 #include "intel386.h"
  27
  28 /* Define how to take a char and sign-extend into an int.
  29    On machines where char is signed, this is a no-op.  */
  30 /* CHECK THIS */
  31 #define SIGN_EXTEND_CHAR(c) (c)
  32
  33 /* Now define a symbol for the cpu type, if your compiler
  34    does not define it automatically:
  35    Ones defined so far include vax, m68000, ns16000, pyramid,
  36    orion, tahoe, APOLLO and many others.  */
  37
  38 /* BTW: ptx defines _SEQUENT_, i386 */
  39
  40 /* Use type int rather than a union, to represent Lisp_Object */
  41 /* This is desirable for most machines.  */
  42
  43 #define NO_UNION_TYPE
  44
  45 /* crt0.c should use the vax-bsd style of entry, with these dummy args.  */
  46 /* Already defined.  Assume prior definition works for PTX.  */
  47 #if 0
  48 #undef CRT0_DUMMIES
  49 #define CRT0_DUMMIES dummy1, dummy2, dummy3,
  50 #endif
  51
  52 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  53    the 24-bit bit field into an int.  In other words, if bit fields
  54    are always unsigned.
  55
  56    If you use NO_UNION_TYPE, this flag does not matter.  */
  57
  58 #define EXPLICIT_SIGN_EXTEND
  59
  60 /* Data type of load average, as read out of kmem.  */
  61
  62 #undef LOAD_AVE_TYPE
  63 #define LOAD_AVE_TYPE unsigned long
  64
  65 /* Convert that into an integer that is 100 for a load average of 1.0  */
  66
  67 #undef FSCALE
  68 #define FSCALE  1000.0
  69 #undef LOAD_AVE_CVT
  70 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
  71
  72 /* Define CANNOT_DUMP on machines where unexec does not work.
  73    Then the function dump-emacs will not be defined
  74    and temacs will do (load "loadup") automatically unless told otherwise.  */
  75
  76 /* #define CANNOT_DUMP */
  77
  78 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  79    pure and impure space as loaded can vary, and even their
  80    relative order cannot be relied on.
  81
  82    Otherwise Emacs assumes that text space precedes data space,
  83    numerically.  */
  84
  85 /* #define VIRT_ADDR_VARIES */
  86
  87 /* Define C_ALLOCA if this machine does not support a true alloca
  88    and the one written in C should be used instead.
  89    Define HAVE_ALLOCA to say that the system provides a properly
  90    working alloca function and it should be used.
  91    Define neither one if an assembler-language alloca
  92    in the file alloca.s should be used.  */
  93
  94 #ifndef __GNUC__
  95 #define C_ALLOCA
  96 #undef HAVE_ALLOCA
  97 #endif
  98
  99 /* Define NO_REMAP if memory segmentation makes it not work well
 100    to change the boundary between the text section and data section
 101    when Emacs is dumped.  If you define this, the preloaded Lisp
 102    code will not be sharable; but that's better than failing completely.  */
 103 /* On PTX, can't seem to get a valid executable unless NO_REMAP is
 104    defined.  This did work in the Sequent patched Emacs 18.57.  */
 105 #ifndef NO_REMAP
 106 #define NO_REMAP
 107 #endif
 108 /* #undef NO_REMAP */
 109
 110 /* If a valid PTX executable could be dumped without NO_REMAP defined,
 111    here's a guess at some defines to make it work.  */
 112 #ifndef NO_REMAP
 113
 114 /* PTX has getpagesize() but it returns 296. Using the default method of
 115    including getpagesize.h in unexec.c returns 4096 which seems more
 116    reasonable.  */
 117 #undef HAVE_GETPAGESIZE
 118
 119 /* Override magic number for a.out header.  */
 120 #define EXEC_MAGIC 0411         /* from a.out.h: separated I&D */
 121
 122 #define ADJUST_TEXT_SCNHDR_SIZE
 123 #define ADJUST_TEXTBASE
 124
 125 /* The file sections in the Symmetry a.out must be on 4K boundaries.  */
 126 /* #define DATA_SECTION_ALIGNMENT       (4096-1) */
 127
 128 #endif  /* ifndef NO_REMAP */
 129
 130 /* Avoids a compiler bug.  */
 131 #define TAHOE_REGISTER_BUG
 132
 133 /* (short) negative-int doesn't sign-extend correctly.  */
 134 #define SHORT_CAST_BUG
 135
 136 /* Cause compilations to be done in parallel in ymakefile.  */
 137 #define MAKE_PARALLEL $&
 138
 139 /* Use terminfo library.  */
 140 #define LIBS_TERMCAP -ltermlib
 141