/* machine description file For the alpha chip.
- Copyright (C) 1994 Free Software Foundation, Inc.
+ Copyright (C) 1994, 1997, 1999, 2002 Free Software Foundation, Inc.
This file is part of GNU Emacs.
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 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
/* The following line tells the configuration script what sort of
*/
-/* The following three symbols give information on
- the size of various data types. */
-
-#define SHORTBITS 16 /* Number of bits in a short */
-
-#define INTBITS 32 /* Number of bits in an int */
-
-#define LONGBITS 64 /* Number of bits in a long */
+#ifndef _LP64
+#define _LP64 /* This doesn't appear to be necessary
+ on OSF 4/5 -- fx. */
+#endif
/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
is the most significant byte. */
#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,
/* Use type EMACS_INT rather than a union, to represent Lisp_Object */
/* This is desirable for most machines. */
-
#define NO_UNION_TYPE
-/* Define the type to use. */
-#define EMACS_INT long
-#define EMACS_UINT unsigned long
-#define SPECIAL_EMACS_INT
-
/* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
the 24-bit bit field into an int. In other words, if bit fields
are always unsigned.
#define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
-/* 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 */
-
-/* Define C_ALLOCA if this machine does not support a true alloca
- and the one written in C should be used instead.
- Define HAVE_ALLOCA to say that the system provides a properly
- working alloca function and it should be used.
- Define neither one if an assembler-language alloca
- in the file alloca.s should be used. */
-
-#define HAVE_ALLOCA
-
/* GNU malloc and the relocating allocator do not work together
- with X. */
-
-#define SYSTEM_MALLOC
-
-/* 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
-
-/* Some really obscure 4.2-based systems (like Sequent DYNIX)
- * do not support asynchronous I/O (using SIGIO) on sockets,
- * even though it works fine on tty's. If you have one of
- * these systems, define the following, and then use it in
- * config.h (or elsewhere) to decide when (not) to use SIGIO.
- *
- * You'd think this would go in an operating-system description file,
- * but since it only occurs on some, but not all, BSD systems, the
- * reasonable place to select for it is in the machine description
- * file.
- */
-
-/* #define NO_SOCK_SIGIO */
+ with X. [Who wrote that?] */
+
+/* May 1995: reportedly [Rainer Schoepf <schoepf@uni-mainz.de>] both the
+ system and the gnu malloc system work with "alpha-dec-osf3.0" and
+ "alpha-dec-osf3.2". */
+
+/* May 1995: it seems to me [Morten Welinder <terra@diku.dk>] that both
+ mallocs work with "alpha-dec-osf2.0", but I daren't break anything
+ right now. Feel free to play if you want. */
+
+/* #define SYSTEM_MALLOC */
+
+#ifdef __ELF__
+/* With ELF, make sure that all common symbols get allocated to in the
+ data section. Otherwise, the dump of temacs may miss variables in
+ the shared library that have been initialized. For example, with
+ GNU libc, __malloc_initialized would normally be resolved to the
+ shared library's .bss section, which is fatal. */
+# ifdef __GNUC__
+# define C_SWITCH_MACHINE -fno-common
+# else
+# error What gives? Fix me if DEC Unix supports ELF now.
+# endif
+#endif
+#if defined(__OpenBSD__)
+#define ORDINARY_LINK
+#endif
-#define HAVE_X11R4
-#define HAVE_X11R5
+#ifdef __ELF__
+#undef UNEXEC
+#define UNEXEC unexelf.o
+#define DATA_START 0x140000000
+#endif
+#ifndef __ELF__
/* Describe layout of the address space in an executing process. */
#define TEXT_START 0x120000000
#define DATA_START 0x140000000
-/* This is necessary for mem-limits.h, so that start_of_data gives
- the correct value */
+/* The program to be used for unexec. */
-#define DATA_SEG_BITS 0x140000000
+#define UNEXEC unexalpha.o
+#endif /* notdef __ELF__ */
+#ifdef OSF1
#define ORDINARY_LINK
+/* Some systems seem to have this, others don't. */
+#ifdef HAVE_LIBDNET
+#define LIBS_MACHINE -ldnet
+#else
+#define LIBS_MACHINE -ldnet_stub
+#endif
+#endif /* OSF1 */
+
+#if 0 /* Rainer Schoepf <schoepf@uni-mainz.de> says this loses with X11R6
+ since it has only shared libraries. */
+#ifndef __GNUC__
+/* This apparently is for the system ld as opposed to Gnu ld. */
#ifdef OSF1
#define LD_SWITCH_MACHINE -non_shared
#endif
+#endif
+#endif /* 0 */
+#ifdef OSF1
#define LIBS_DEBUG
#define START_FILES pre-crt0.o
+#endif
+#if defined (LINUX) && __GNU_LIBRARY__ - 0 < 6
+/* This controls a conditional in main. */
+#define LINUX_SBRK_BUG
+#endif
-/* The program to be used for unexec. */
-
-#define UNEXEC unexalpha.o
-
-
-#define PNTR_COMPARISON_TYPE unsigned long
-
-/* On the 64 bit architecture, we can use 60 bits for addresses */
-
-#define VALBITS 60
-
-
-/* This definition of MARKBIT is necessary because of the comparison of
- ARRAY_MARK_FLAG and MARKBIT in an #if in lisp.h, which cpp doesn't like. */
-
-#define MARKBIT 0x8000000000000000L
-
-
-/* Define XINT and XUINT so that they can take arguments of type int */
-#define XINT(a) (((long)(a) << LONGBITS-VALBITS) >> LONGBITS-VALBITS)
-#define XUINT(a) ((long)(a) & VALMASK)
+#ifndef NOT_C_CODE
+/* We need these because pointers are larger than the default ints. */
+#if !defined(__NetBSD__) && !defined(__OpenBSD__)
+#include <alloca.h>
+#endif
-/* Define XPNTR to avoid or'ing with DATA_SEG_BITS */
+#endif /* not NOT_C_CODE */
-#define XPNTR(a) XUINT (a)
+#ifdef OSF1
+#define PTY_ITERATION for (i = 0; i < 1; i++) /* ick */
+#define PTY_NAME_SPRINTF /* none */
+#define PTY_TTY_NAME_SPRINTF /* none */
+#define PTY_OPEN \
+ do \
+ { \
+ int dummy; \
+ SIGMASKTYPE mask; \
+ mask = sigblock (sigmask (SIGCHLD)); \
+ if (-1 == openpty (&fd, &dummy, pty_name, 0, 0)) \
+ fd = -1; \
+ sigsetmask (mask); \
+ emacs_close (dummy); \
+ } \
+ while (0)
+#endif
-/* Declare malloc and realloc in a way that is clean.
- But not in makefiles! */
+/* On the Alpha it's best to avoid including TERMIO since struct
+ termio and struct termios are mutually incompatible. */
+#define NO_TERMIO
-#ifndef NOT_C_CODE
-#ifndef THIS_IS_YMAKEFILE
-/* We need these because pointers are larger than the default ints. */
-#include <alloca.h>
-#include <string.h>
-extern void *malloc (), *realloc ();
-extern long *xmalloc (), *xrealloc ();
+#if defined (LINUX) || defined (__NetBSD__) || defined (__OpenBSD__)
+# define TEXT_END ({ extern int _etext; &_etext; })
+# ifndef __ELF__
+# define COFF
+# define DATA_END ({ extern int _EDATA; &_EDATA; })
+# endif /* notdef __ELF__ */
#endif
+
+#if (defined (__NetBSD__) || defined (__OpenBSD__)) && defined (__ELF__)
+#define HAVE_TEXT_START
#endif
+
+/* Many Alpha implementations (e.g. gas 2.8) can't handle DBL_MIN:
+ they generate code that uses a signaling NaN instead of DBL_MIN.
+ Define DBL_MIN_REPLACEMENT to be the next value larger than DBL_MIN:
+ this avoids the assembler bug. */
+#define DBL_MIN_REPLACEMENT 2.2250738585072019e-308