src/m/convex.h

   1 /* machine description file for Convex (all models).
   2    Copyright (C) 1987, 1994, 2001, 2002, 2003, 2004,
   3                  2005, 2006, 2007, 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, or (at your option)
  10 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; see the file COPYING.  If not, write to
  19 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20 Boston, MA 02110-1301, USA.  */
  21
  22
  23 /* The following line tells the configuration script what sort of
  24    operating system this machine is likely to run.
  25    USUAL-OPSYS="bsd4-3"  */
  26
  27 /* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
  28    is the most significant byte.  */
  29
  30 #define WORDS_BIG_ENDIAN
  31
  32 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  33  * group of arguments and treat it as an array of the arguments.
  34  * Maybe it would be better to simply correct the code. */
  35
  36 #define NO_ARG_ARRAY
  37
  38 /* Define WORD_MACHINE if addresses and such have
  39  * to be corrected before they can be used as byte counts.  */
  40
  41 /* #define WORD_MACHINE */
  42
  43 /* Now define a symbol for the cpu type, if your compiler
  44    does not define it automatically.  */
  45 #ifndef convex  /* The compiler doesn't always do this.  */
  46 #define convex
  47 #endif
  48
  49 /* Use type int rather than a union, to represent Lisp_Object */
  50 /* This is desirable for most machines.  */
  51
  52 #define NO_UNION_TYPE
  53
  54 #ifndef __GNUC__ /* David M. Cooke <dcooke@haven.larc.nasa.gov>
  55                     and Ralph Sobek <Ralph.Sobek@cerfacs.fr> agree
  56                     must ignore one arg when compiled with convex compiler.  */
  57 #define CRT0_DUMMIES ignore,
  58 #else
  59 #define CRT0_DUMMIES
  60 #endif
  61
  62 /* crt0.c should define a symbol `start' and do .globl with a dot.  */
  63
  64 #define DOT_GLOBAL_START
  65
  66 /* Data type of load average, as read out of kmem.  */
  67
  68 #define LOAD_AVE_TYPE double
  69
  70 /* Convert that into an integer that is 100 for a load average of 1.0  */
  71
  72 #define LOAD_AVE_CVT(x) (int) ((x) * 100.0)
  73
  74 /* Define CANNOT_DUMP on machines where unexec does not work.
  75    Then the function dump-emacs will not be defined
  76    and temacs will do (load "loadup") automatically unless told otherwise.  */
  77
  78 /* #define CANNOT_DUMP */
  79
  80 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  81    pure and impure space as loaded can vary, and even their
  82    relative order cannot be relied on.
  83
  84    Otherwise Emacs assumes that text space precedes data space,
  85    numerically.  */
  86
  87 /*#define VIRT_ADDR_VARIES*/
  88
  89 /* Must use the system's termcap.  It does special things.  */
  90
  91 #define LIBS_TERMCAP -ltermcap
  92
  93 /* Define NO_REMAP if memory segmentation makes it not work well
  94    to change the boundary between the text section and data section
  95    when Emacs is dumped.  If you define this, the preloaded Lisp
  96    code will not be sharable; but that's better than failing completely.  */
  97
  98 /* #define NO_REMAP */
  99 \f
 100 /* Addresses on the Convex have the high bit set.  */
 101 #define DATA_SEG_BITS (1 << (BITS_PER_INT-1))
 102
 103 /* Right shift is logical shift.
 104    And the usual way of handling such machines, which involves
 105    copying the number into sign_extend_temp, does not work
 106    for reasons as yet unknown.  */
 107
 108 #define XINT(a)  sign_extend_lisp_int (a)
 109
 110 /* Convex uses a special version of unexec.  */
 111
 112 #define UNEXEC unexconvex.o
 113
 114 /* you gotta define 'COFF' for post 6.1 unexec. */
 115
 116 #define COFF
 117 #define TEXT_START 0x80001000
 118
 119 /* Posix stuff for Convex OS 8.1 and up. */
 120
 121 #define LD_SWITCH_MACHINE \
 122     -e__start -L /usr/lib \
 123     '-A__iob=___ap$$iob' '-A_use_libc_sema=___ap$$use_libc_sema'
 124
 125 /* Use <dirent.h>. */
 126 #define SYSV_SYSTEM_DIR
 127
 128 #ifdef _POSIX_SOURCE
 129
 130 /* These symbols have been undefined to advance the state of the art. */
 131
 132 #define S_IFMT _S_IFMT
 133 #define S_IFDIR _S_IFDIR
 134
 135 #define S_IREAD _S_IREAD
 136 #define S_IWRITE _S_IWRITE
 137 #define S_IEXEC _S_IEXEC
 138
 139 #endif
 140
 141 /* Ptys may start below ptyp0; call a routine to hunt for where. */
 142
 143 #undef FIRST_PTY_LETTER
 144 #define FIRST_PTY_LETTER first_pty_letter()
 145
 146 #if 0
 147 /*
 148  * Force a K&R compilation and libraries with the Convex V 4.0 C compiler
 149  */
 150 #define C_SWITCH_MACHINE -pcc
 151 #define LIB_STANDARD -lc_old
 152 #define LIBS_MACHINE -lC2_old
 153 #define LD_SWITCH_MACHINE -X -NL -fn -Enoposix -A__iob=___ap\$$iob \
 154  -A_use_libc_sema=___ap\$$use_libc_sema -L /usr/lib
 155 #endif
 156
 157 /* Avoid error in xrdb.c - d.m.cooke@larc.nasa.gov.  */
 158 #define DECLARE_GETPWUID_WITH_UID_T
 159
 160 /* Call getpgrp properly.  */
 161 #define GETPGRP_NO_ARG
 162
 163 /* Tested for both Convex C and GNUC by d.m.cooke@larc.nasa.gov.  */
 164 #define LIBS_MACHINE -lC2
 165
 166 /* Avoid error in getloadavg.c.  */
 167 #define NLIST_NAME_UNION  1
 168
 169 #if 0  /* This is supposed to be an improvement.
 170           It would be good for people to try enabling this code
 171           and report the results.  */
 172 /* gcc -nostdlib prevents some math symbols from being included.
 173    So we have to use -nostartfiles instead. */
 174 #define LINKER $(CC) -nostartfiles
 175
 176 #define ORDINARY_LINK
 177
 178 #undef LD_SWITCH_MACHINE
 179 #define LD_SWITCH_MACHINE \
 180     -L /usr/lib \
 181     '-A__iob=___ap$$iob' '-A_use_libc_sema=___ap$$use_libc_sema'
 182 #endif
 183
 184 /* There is some indication that the convex has sys/wait.h
 185    but it does not work right.  */
 186 #undef HAVE_SYS_WAIT_H
 187
 188 /* arch-tag: 127e5ae1-4f03-40c0-a87e-d2cb02c59de8
 189    (do not change this comment) */