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428
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1 /* machine description file for SEQUENT machines running DYNIX/ptx
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2 Copyright (C) 1985, 1986 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="ptx" */
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26
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27 #include "intel386.h"
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28
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29 /* Now define a symbol for the cpu type, if your compiler
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30 does not define it automatically:
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31 Ones defined so far include vax, m68000, ns16000, pyramid,
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32 orion, tahoe, APOLLO and many others. */
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33
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34 /* BTW: ptx defines _SEQUENT_, i386 */
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35
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36 /* crt0.c should use the vax-bsd style of entry, with these dummy args. */
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37 /* Already defined. Assume prior definition works for PTX. */
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38 #if 0
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39 #undef CRT0_DUMMIES
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40 #define CRT0_DUMMIES dummy1, dummy2, dummy3,
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41 #endif
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42
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43 /* Data type of load average, as read out of kmem. */
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44
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45 #define LOAD_AVE_TYPE unsigned long
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46
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47 /* Convert that into an integer that is 100 for a load average of 1.0 */
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48
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49 #define FSCALE 1000.0
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50 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
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51
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52 /* Define NO_REMAP if memory segmentation makes it not work well
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53 to change the boundary between the text section and data section
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54 when Emacs is dumped. If you define this, the preloaded Lisp
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55 code will not be sharable; but that's better than failing completely. */
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56 /* On PTX, can't seem to get a valid executable unless NO_REMAP is
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57 defined. This did work in the Sequent patched Emacs 18.57. */
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58 #ifndef NO_REMAP
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59 #define NO_REMAP
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60 #endif
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61 /* #undef NO_REMAP */
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62
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63 /* If a valid PTX executable could be dumped without NO_REMAP defined,
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64 here's a guess at some defines to make it work. */
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65 #ifndef NO_REMAP
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66
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67 /* PTX has getpagesize() but it returns 296. Using the default method of
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68 including getpagesize.h in unexec.c returns 4096 which seems more
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69 reasonable. */
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70 #undef HAVE_GETPAGESIZE
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71
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72 /* Override magic number for a.out header. */
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73 #define EXEC_MAGIC 0411 /* from a.out.h: separated I&D */
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74
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75 #define ADJUST_TEXT_SCNHDR_SIZE
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76 #define ADJUST_TEXTBASE
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77
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78 /* The file sections in the Symmetry a.out must be on 4K boundaries. */
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79 /* #define DATA_SECTION_ALIGNMENT (4096-1) */
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80
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81 #endif /* ifndef NO_REMAP */
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82
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83 /* Avoids a compiler bug. */
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84 #define TAHOE_REGISTER_BUG
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85
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86 /* (short) negative-int doesn't sign-extend correctly. */
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87 #define SHORT_CAST_BUG
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88
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89 /* Cause compilations to be done in parallel in ymakefile. */
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90 #define MAKE_PARALLEL $&
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91
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92 /* Use terminfo library. */
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93 #define LIBS_TERMCAP "-ltermlib"
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94
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