[bpt/emacs.git] / src / m / intel386.h

/* Machine description file for intel 386.
   Copyright (C) 1987 Free Software Foundation, Inc.

This file is part of GNU Emacs.

GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING.  If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */


/* The following line tells the configuration script what sort of 
   operating system this machine is likely to run.
   USUAL-OPSYS="note"

NOTE-START
Intel 386 (-machine=intel386 or -machine=is386.h)

  The possibilities for -opsystem are: bsd4-2, usg5-2-2, usg5-3,
  isc2-2, 386-ix, esix, linux, sco3.2v4, and xenix.

  18.58 should support a wide variety of operating systems.
  Use isc2-2 for Interactive 386/ix version 2.2.
  Use 386ix for prior versions.
  Use esix for Esix.
  Use linux for Linux.
  It isn't clear what to do on an SCO system.

  -machine=is386 is used for an Integrated Solutions 386 machine.
  It may also be correct for Microport systems.

Cubix QBx/386 (-machine=intel386 -opsystem=usg5-3)

  Changes merged in 19.1.  Systems before 2/A/0 may fail to compile etags.c
  due to a compiler bug.

Prime EXL (-machine=intel386 -opsystem=usg5-3)

  Minor changes merged in 19.1.
NOTE-END */

/* The following three symbols give information on
 the size of various data types.  */


/* Linux defines these in <values.h>, but they can't be used in #if's */
#undef SHORTBITS
#undef INTBITS
#undef LONGBITS
  
#define SHORTBITS 16		/* Number of bits in a short */

#define INTBITS 32		/* Number of bits in an int */

#define LONGBITS 32		/* Number of bits in a long */

/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
   is the most significant byte.  */

#undef WORDS_BIG_ENDIAN

/* Define NO_ARG_ARRAY if you cannot take the address of the first of a
 * group of arguments and treat it as an array of the arguments.  */

/* #define NO_ARG_ARRAY */

/* Define WORD_MACHINE if addresses and such have
 * to be corrected before they can be used as byte counts.  */

/* #define WORD_MACHINE */

/* Now define a symbol for the cpu type, if your compiler
   does not define it automatically:
   Ones defined so far include vax, m68000, ns16000, pyramid,
   orion, tahoe, APOLLO and many others */

#define INTEL386

/* Use type int rather than a union, to represent Lisp_Object */

#define NO_UNION_TYPE

/* crt0.c, if it is used, should use the i386-bsd style of entry.
   with no extra dummy args.  On USG and XENIX,
   NO_REMAP says this isn't used. */

#define CRT0_DUMMIES bogus_fp,

/* crt0.c should define a symbol `start' and do .globl with a dot.  */

#define DOT_GLOBAL_START

#ifdef XENIX
/* Data type of load average, as read out of kmem.  */
#define LOAD_AVE_TYPE short

/* Convert that into an integer that is 100 for a load average of 1.0  */
#define LOAD_AVE_CVT(x) (((double) (x)) * 100.0 / FSCALE)

#define FSCALE 256.0         /* determined by experimentation...  */
#endif


#ifdef SOLARIS2
/* Data type of load average, as read out of kmem.  */
#define LOAD_AVE_TYPE long

/* Convert that into an integer that is 100 for a load average of 1.0  */
/* This is totally uncalibrated. */
#define LOAD_AVE_CVT(x) ((int) (((double) (x)) * 100.0 / FSCALE))

#ifndef SOLARIS2_4
/* j.w.hawtin@lut.ac.uk says Solaris 2.1 on the X86 needs -lkvm, and it 
   already has FSCALE defined in a system header.  */
#define LIBS_MACHINE -lkvm

#define HAVE_VFORK

#else /* SOLARIS2_4 */
#ifndef __GNUC__
#define C_SWITCH_MACHINE -Xa
#ifdef HAVE_ALLOCA_H
#include <alloca.h>
#endif /* HAVE_ALLOCA_H */
#endif /* not __GNUC__ */
#endif /* SOLARIS2_4 */

/* configure thinks solaris X86 has gethostname, but it does not work,
   so undefine it.  */
#undef HAVE_GETHOSTNAME

#else /* not SOLARIS2 */
#ifdef USG5_4 /* Older USG systems do not support the load average.  */
/* Data type of load average, as read out of kmem.  */

#define LOAD_AVE_TYPE long

/* Convert that into an integer that is 100 for a load average of 1.0  */
/* This is totally uncalibrated. */

#define LOAD_AVE_CVT(x) ((int) (((double) (x)) * 100.0 / FSCALE))
#define FSCALE 256.0
#endif
#endif /* not SOLARIS2 */

/* Define CANNOT_DUMP on machines where unexec does not work.
   Then the function dump-emacs will not be defined
   and temacs will do (load "loadup") automatically unless told otherwise.  */

/* #define CANNOT_DUMP */

/* Define VIRT_ADDR_VARIES if the virtual addresses of
   pure and impure space as loaded can vary, and even their
   relative order cannot be relied on.

   Otherwise Emacs assumes that text space precedes data space,
   numerically.  */

/* #define VIRT_ADDR_VARIES */

#ifdef XENIX
/* Define NO_REMAP if memory segmentation makes it not work well
   to change the boundary between the text section and data section
   when Emacs is dumped.  If you define this, the preloaded Lisp
   code will not be sharable; but that's better than failing completely.  */

#define NO_REMAP

#define STACK_DIRECTION -1

/* Since cannot purify, use standard Xenix 386 startup code. */

#define START_FILES	/lib/386/Sseg.o pre-crt0.o /lib/386/Scrt0.o

/* These really use terminfo.  */

#define LIBS_TERMCAP /lib/386/Slibcurses.a  \
   /lib/386/Slibtinfo.a /lib/386/Slibx.a

/* Standard libraries for this machine.  Since `-l' doesn't work in `ld'.  */
/* '__fltused' is unresolved w/o Slibcfp.a */
#define LIB_STANDARD /lib/386/Slibcfp.a /lib/386/Slibc.a
#else /* not XENIX */

/* this brings in alloca() if we're using cc */
#ifdef USG
#ifndef LIB_STANDARD
#ifdef USG5_4
#define LIB_STANDARD -lc
#else /* not USG5_4 */
#define LIB_STANDARD -lPW -lc
#endif /* not USG5_4 */
#endif /* LIB_STANDARD */

#define HAVE_ALLOCA
#define NO_REMAP 
#define TEXT_START 0
#endif /* USG */
#endif /* not XENIX */

#ifdef BSD
#define HAVE_ALLOCA
#endif /* BSD */

/* If compiling with GCC, let GCC implement alloca.  */
#if defined(__GNUC__) && !defined(alloca)
#define alloca(n) __builtin_alloca(n)
#define HAVE_ALLOCA
#endif

#ifdef USG5_4
#define DATA_SEG_BITS 0x08000000
#endif

#ifdef MSDOS
#define NO_REMAP
#endif

#ifdef WINDOWSNT
#define VIRT_ADDR_VARIES
#define DATA_END 	get_data_end ()
#define DATA_START 	get_data_start ()
#define HAVE_ALLOCA
#endif
Commit	Line	Data
23b0668c	1	/* Machine description file for intel 386.
20c428fd JB	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
17385adc	8	the Free Software Foundation; either version 2, or (at your option)
20c428fd JB	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="note"
	24
	25	NOTE-START
	26	Intel 386 (-machine=intel386 or -machine=is386.h)
	27
	28	The possibilities for -opsystem are: bsd4-2, usg5-2-2, usg5-3,
b2aaf43a	29	isc2-2, 386-ix, esix, linux, sco3.2v4, and xenix.
20c428fd JB	30
	31	18.58 should support a wide variety of operating systems.
	32	Use isc2-2 for Interactive 386/ix version 2.2.
	33	Use 386ix for prior versions.
b2aaf43a JB	34	Use esix for Esix.
	35	Use linux for Linux.
	36	It isn't clear what to do on an SCO system.
20c428fd JB	37
	38	-machine=is386 is used for an Integrated Solutions 386 machine.
	39	It may also be correct for Microport systems.
	40
	41	Cubix QBx/386 (-machine=intel386 -opsystem=usg5-3)
	42
	43	Changes merged in 19.1. Systems before 2/A/0 may fail to compile etags.c
	44	due to a compiler bug.
	45
	46	Prime EXL (-machine=intel386 -opsystem=usg5-3)
	47
	48	Minor changes merged in 19.1.
	49	NOTE-END */
	50
	51	/* The following three symbols give information on
	52	the size of various data types. */
	53
b2aaf43a JB	54
	55	/* Linux defines these in <values.h>, but they can't be used in #if's */
	56	#undef SHORTBITS
	57	#undef INTBITS
	58	#undef LONGBITS
	59
20c428fd JB	60	#define SHORTBITS 16 /* Number of bits in a short */
	61
	62	#define INTBITS 32 /* Number of bits in an int */
	63
	64	#define LONGBITS 32 /* Number of bits in a long */
	65
74d3f806 KH	66	/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
	67	is the most significant byte. */
	68
	69	#undef WORDS_BIG_ENDIAN
	70
20c428fd JB	71	/* Define NO_ARG_ARRAY if you cannot take the address of the first of a
	72	* group of arguments and treat it as an array of the arguments. */
	73
	74	/* #define NO_ARG_ARRAY */
	75
	76	/* Define WORD_MACHINE if addresses and such have
	77	* to be corrected before they can be used as byte counts. */
	78
	79	/* #define WORD_MACHINE */
	80
20c428fd JB	81	/* Now define a symbol for the cpu type, if your compiler
	82	does not define it automatically:
	83	Ones defined so far include vax, m68000, ns16000, pyramid,
	84	orion, tahoe, APOLLO and many others */
	85
	86	#define INTEL386
	87
	88	/* Use type int rather than a union, to represent Lisp_Object */
	89
	90	#define NO_UNION_TYPE
	91
	92	/* crt0.c, if it is used, should use the i386-bsd style of entry.
	93	with no extra dummy args. On USG and XENIX,
	94	NO_REMAP says this isn't used. */
	95
	96	#define CRT0_DUMMIES bogus_fp,
	97
	98	/* crt0.c should define a symbol `start' and do .globl with a dot. */
	99
	100	#define DOT_GLOBAL_START
	101
	102	#ifdef XENIX
	103	/* Data type of load average, as read out of kmem. */
	104	#define LOAD_AVE_TYPE short
	105
	106	/* Convert that into an integer that is 100 for a load average of 1.0 */
23b0668c	107	#define LOAD_AVE_CVT(x) (((double) (x)) * 100.0 / FSCALE)
3186ddb7	108
20c428fd JB	109	#define FSCALE 256.0 /* determined by experimentation... */
	110	#endif
	111
20c428fd	112
bb0807e7 RS	113	#ifdef SOLARIS2
	114	/* Data type of load average, as read out of kmem. */
	115	#define LOAD_AVE_TYPE long
	116
	117	/* Convert that into an integer that is 100 for a load average of 1.0 */
	118	/* This is totally uncalibrated. */
	119	#define LOAD_AVE_CVT(x) ((int) (((double) (x)) * 100.0 / FSCALE))
	120
7fa36802	121	#ifndef SOLARIS2_4
bb0807e7	122	/* j.w.hawtin@lut.ac.uk says Solaris 2.1 on the X86 needs -lkvm, and it
7fa36802	123	already has FSCALE defined in a system header. */
bb0807e7	124	#define LIBS_MACHINE -lkvm
3a7cf115	125
3a7cf115 RS	126	#define HAVE_VFORK
3a7cf115 RS	127
17b406a8 RS	128	#else /* SOLARIS2_4 */
17b406a8 RS	129	#ifndef __GNUC__
a40b9bc7	130	#define C_SWITCH_MACHINE -Xa
17b406a8 RS	131	#ifdef HAVE_ALLOCA_H
	132	#include <alloca.h>
	133	#endif /* HAVE_ALLOCA_H */
	134	#endif /* not __GNUC__ */
	135	#endif /* SOLARIS2_4 */
7fa36802 RS	136
	137	/* configure thinks solaris X86 has gethostname, but it does not work,
	138	so undefine it. */
bb0807e7	139	#undef HAVE_GETHOSTNAME
5d32abe6 RS	140
	141	#else /* not SOLARIS2 */
	142	#ifdef USG5_4 /* Older USG systems do not support the load average. */
	143	/* Data type of load average, as read out of kmem. */
	144
	145	#define LOAD_AVE_TYPE long
	146
	147	/* Convert that into an integer that is 100 for a load average of 1.0 */
	148	/* This is totally uncalibrated. */
	149
	150	#define LOAD_AVE_CVT(x) ((int) (((double) (x)) * 100.0 / FSCALE))
	151	#define FSCALE 256.0
bb0807e7	152	#endif
5d32abe6	153	#endif /* not SOLARIS2 */
bb0807e7	154
20c428fd JB	155	/* Define CANNOT_DUMP on machines where unexec does not work.
	156	Then the function dump-emacs will not be defined
	157	and temacs will do (load "loadup") automatically unless told otherwise. */
	158
	159	/* #define CANNOT_DUMP */
	160
	161	/* Define VIRT_ADDR_VARIES if the virtual addresses of
	162	pure and impure space as loaded can vary, and even their
	163	relative order cannot be relied on.
	164
	165	Otherwise Emacs assumes that text space precedes data space,
	166	numerically. */
	167
	168	/* #define VIRT_ADDR_VARIES */
	169
	170	#ifdef XENIX
20c428fd JB	171	/* Define NO_REMAP if memory segmentation makes it not work well
	172	to change the boundary between the text section and data section
	173	when Emacs is dumped. If you define this, the preloaded Lisp
	174	code will not be sharable; but that's better than failing completely. */
	175
	176	#define NO_REMAP
	177
	178	#define STACK_DIRECTION -1
	179
	180	/* Since cannot purify, use standard Xenix 386 startup code. */
	181
	182	#define START_FILES /lib/386/Sseg.o pre-crt0.o /lib/386/Scrt0.o
	183
	184	/* These really use terminfo. */
	185
	186	#define LIBS_TERMCAP /lib/386/Slibcurses.a \
	187	/lib/386/Slibtinfo.a /lib/386/Slibx.a
	188
	189	/* Standard libraries for this machine. Since `-l' doesn't work in `ld'. */
	190	/* '__fltused' is unresolved w/o Slibcfp.a */
	191	#define LIB_STANDARD /lib/386/Slibcfp.a /lib/386/Slibc.a
	192	#else /* not XENIX */
	193
399c3df8	194	/* this brings in alloca() if we're using cc */
20c428fd	195	#ifdef USG
23b0668c	196	#ifndef LIB_STANDARD
399c3df8 JB	197	#ifdef USG5_4
	198	#define LIB_STANDARD -lc
	199	#else /* not USG5_4 */
20c428fd	200	#define LIB_STANDARD -lPW -lc
399c3df8 JB	201	#endif /* not USG5_4 */
	202	#endif /* LIB_STANDARD */
	203
20c428fd JB	204	#define HAVE_ALLOCA
	205	#define NO_REMAP
	206	#define TEXT_START 0
ebfbbbe4	207	#endif /* USG */
20c428fd JB	208	#endif /* not XENIX */
	209
	210	#ifdef BSD
	211	#define HAVE_ALLOCA
	212	#endif /* BSD */
20c428fd JB	213
	214	/* If compiling with GCC, let GCC implement alloca. */
	215	#if defined(__GNUC__) && !defined(alloca)
	216	#define alloca(n) __builtin_alloca(n)
	217	#define HAVE_ALLOCA
	218	#endif
	219
23b0668c JB	220	#ifdef USG5_4
	221	#define DATA_SEG_BITS 0x08000000
	222	#endif
44177ab0 RS	223
	224	#ifdef MSDOS
	225	#define NO_REMAP
	226	#endif
8c147e40 KH	227
	228	#ifdef WINDOWSNT
	229	#define VIRT_ADDR_VARIES
	230	#define DATA_END get_data_end ()
	231	#define DATA_START get_data_start ()
	232	#define HAVE_ALLOCA
	233	#endif