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20c428fd JB |
1 | /* machine description file for convex C1. |
2 | Copyright (C) 1987 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 1, 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, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
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="bsd4-3" */ | |
24 | ||
25 | /* The following three symbols give information on | |
26 | the size of various data types. */ | |
27 | ||
28 | #define SHORTBITS 16 /* Number of bits in a short */ | |
29 | ||
30 | #define INTBITS 32 /* Number of bits in an int */ | |
31 | ||
32 | #define LONGBITS 32 /* Number of bits in a long */ | |
33 | ||
34 | /* Define BIG_ENDIAN iff lowest-numbered byte in a word | |
35 | is the most significant byte. */ | |
36 | ||
37 | #define BIG_ENDIAN | |
38 | ||
39 | /* Define NO_ARG_ARRAY if you cannot take the address of the first of a | |
40 | * group of arguments and treat it as an array of the arguments. | |
41 | * Maybe it would be better to simply correct the code. */ | |
42 | ||
43 | #define NO_ARG_ARRAY | |
44 | ||
45 | /* Define WORD_MACHINE if addresses and such have | |
46 | * to be corrected before they can be used as byte counts. */ | |
47 | ||
48 | /* #define WORD_MACHINE */ | |
49 | ||
20c428fd JB |
50 | /* Now define a symbol for the cpu type, if your compiler |
51 | does not define it automatically. */ | |
52 | ||
53 | /* convex already defined... */ | |
54 | ||
55 | /* Use type int rather than a union, to represent Lisp_Object */ | |
56 | /* This is desirable for most machines. */ | |
57 | ||
58 | #define NO_UNION_TYPE | |
59 | ||
60 | /* crt0.c should use the vax-bsd style of entry, with no dummy args. */ | |
61 | ||
62 | #define CRT0_DUMMIES | |
63 | ||
64 | /* crt0.c should define a symbol `start' and do .globl with a dot. */ | |
65 | ||
66 | #define DOT_GLOBAL_START | |
67 | ||
68 | /* Data type of load average, as read out of kmem. */ | |
69 | ||
70 | #define LOAD_AVE_TYPE double | |
71 | ||
72 | /* Convert that into an integer that is 100 for a load average of 1.0 */ | |
73 | ||
74 | #define LOAD_AVE_CVT(x) (int) ((x) * 100.0) | |
75 | ||
76 | /* Define CANNOT_DUMP on machines where unexec does not work. | |
77 | Then the function dump-emacs will not be defined | |
78 | and temacs will do (load "loadup") automatically unless told otherwise. */ | |
79 | ||
80 | /* #define CANNOT_DUMP */ | |
81 | ||
82 | /* Define VIRT_ADDR_VARIES if the virtual addresses of | |
83 | pure and impure space as loaded can vary, and even their | |
84 | relative order cannot be relied on. | |
85 | ||
86 | Otherwise Emacs assumes that text space precedes data space, | |
87 | numerically. */ | |
88 | ||
89 | /*#define VIRT_ADDR_VARIES*/ | |
90 | ||
91 | /* Define C_ALLOCA if this machine does not support a true alloca | |
92 | and the one written in C should be used instead. | |
93 | Define HAVE_ALLOCA to say that the system provides a properly | |
94 | working alloca function and it should be used. | |
95 | Define neither one if an assembler-language alloca | |
96 | in the file alloca.s should be used. */ | |
97 | ||
98 | /*#define C_ALLOCA*/ | |
99 | #define HAVE_ALLOCA | |
100 | ||
101 | /* Define NO_REMAP if memory segmentation makes it not work well | |
102 | to change the boundary between the text section and data section | |
103 | when Emacs is dumped. If you define this, the preloaded Lisp | |
104 | code will not be sharable; but that's better than failing completely. */ | |
105 | ||
106 | /* #define NO_REMAP */ | |
107 | \f | |
108 | /* Addresses on the Convex have the high bit set. */ | |
109 | #define DATA_SEG_BITS (1 << (INTBITS-1)) | |
110 | ||
111 | /* Right shift is logical shift. | |
112 | And the usual way of handling such machines, which involves | |
113 | copying the number into sign_extend_temp, does not work | |
114 | for reasons as yet unknown. */ | |
115 | ||
116 | #define XINT(a) sign_extend_lisp_int (a) | |
117 | ||
118 | /* Convex uses a special version of unexec. */ | |
119 | ||
120 | #define UNEXEC unexconvex.o | |
121 | ||
122 | /* you gotta define 'COFF' for post 6.1 unexec. */ | |
123 | ||
124 | #define COFF | |
125 | #define TEXT_START 0x80001000 | |
126 | ||
127 | /* Posix stuff for Convex OS 8.1 and up. */ | |
128 | ||
129 | #define C_SWITCH_MACHINE -pcc | |
130 | #define LD_SWITCH_MACHINE \ | |
131 | -e__start -L /usr/lib \ | |
132 | '-A__iob=___ap$$iob' '-A_use_libc_sema=___ap$$use_libc_sema' | |
133 | ||
134 | /* Use setsid when starting up inferiors. */ | |
135 | #define HAVE_SETSID | |
136 | ||
137 | /* Use <dirent.h>. */ | |
138 | #define SYSV_SYSTEM_DIR | |
139 | #define HAVE_CLOSEDIR | |
140 | ||
141 | #ifdef _POSIX_SOURCE | |
142 | ||
143 | /* These symbols have been undefined to advance the state of the art. */ | |
144 | ||
145 | #define S_IFMT _S_IFMT | |
146 | #define S_IFDIR _S_IFDIR | |
147 | ||
148 | #define S_IREAD _S_IREAD | |
149 | #define S_IWRITE _S_IWRITE | |
150 | #define S_IEXEC _S_IEXEC | |
151 | ||
152 | #endif | |
153 | ||
154 | /* Ptys may start below ptyp0; call a routine to hunt for where. */ | |
155 | ||
156 | #undef FIRST_PTY_LETTER | |
157 | #define FIRST_PTY_LETTER first_pty_letter() | |
158 | ||
159 | #if 0 | |
160 | /* | |
161 | * Force a K&R compilation and libraries with the Convex V 4.0 C compiler | |
162 | */ | |
163 | #define C_SWITCH_MACHINE -pcc | |
164 | #define LIB_STANDARD -lc_old | |
165 | #define LIBS_MACHINE -lC2_old | |
166 | #define LD_SWITCH_MACHINE -X -NL -fn -Enoposix -A__iob=___ap\$$iob \ | |
167 | -A_use_libc_sema=___ap\$$use_libc_sema -L /usr/lib | |
168 | #endif |