src/m/amdx86-64.h

   1 /* machine description file for AMD x86-64.
   2    Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008
   3      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 of the License, or
  10 (at your option) 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.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #ifdef i386
  21 /* Although we're running on an amd64 kernel, we're actually compiling for
  22    the x86 architecture.  The user should probably have provided an
  23    explicit --build to `configure', but if everything else than the kernel
  24    is running in i386 mode, then the bug is really ours: we should have
  25    guessed better.  */
  26 #include "m/intel386.h"
  27 #else
  28
  29 /* The following line tells the configuration script what sort of
  30    operating system this machine is likely to run.
  31    USUAL-OPSYS="linux"  */
  32
  33 #define BITS_PER_LONG           64
  34 #define BITS_PER_EMACS_INT      64
  35
  36 /* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
  37    is the most significant byte.  */
  38
  39 #undef WORDS_BIG_ENDIAN
  40
  41 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  42  * group of arguments and treat it as an array of the arguments.  */
  43
  44 #define NO_ARG_ARRAY
  45
  46 /* Define WORD_MACHINE if addresses and such have
  47  * to be corrected before they can be used as byte counts.  */
  48
  49 /* #define WORD_MACHINE */
  50
  51 /* Now define a symbol for the cpu type, if your compiler
  52    does not define it automatically:
  53    Ones defined so far include vax, m68000, ns16000, pyramid,
  54    orion, tahoe, APOLLO and many others */
  55 /* __x86_64 defined automatically.  */
  56
  57 /* Use type int rather than a union, to represent Lisp_Object */
  58 /* This is desirable for most machines.  */
  59
  60 #define NO_UNION_TYPE
  61
  62 /* Define the type to use.  */
  63 #define EMACS_INT               long
  64 #define EMACS_UINT              unsigned long
  65 #define SPECIAL_EMACS_INT
  66
  67 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  68    the 24-bit bit field into an int.  In other words, if bit fields
  69    are always unsigned.
  70
  71    If you use NO_UNION_TYPE, this flag does not matter.  */
  72
  73 #define EXPLICIT_SIGN_EXTEND
  74
  75 /* Data type of load average, as read out of kmem.  */
  76
  77 #define LOAD_AVE_TYPE long
  78
  79 /* Convert that into an integer that is 100 for a load average of 1.0  */
  80
  81 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
  82
  83 /* Define CANNOT_DUMP on machines where unexec does not work.
  84    Then the function dump-emacs will not be defined
  85    and temacs will do (load "loadup") automatically unless told otherwise.  */
  86
  87 /* #define CANNOT_DUMP */
  88
  89 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  90    pure and impure space as loaded can vary, and even their
  91    relative order cannot be relied on.
  92
  93    Otherwise Emacs assumes that text space precedes data space,
  94    numerically.  */
  95
  96 /* #define VIRT_ADDR_VARIES */
  97
  98 /* Define NO_REMAP if memory segmentation makes it not work well
  99    to change the boundary between the text section and data section
 100    when Emacs is dumped.  If you define this, the preloaded Lisp
 101    code will not be sharable; but that's better than failing completely.  */
 102
 103 /* #define NO_REMAP */
 104
 105 #define PNTR_COMPARISON_TYPE unsigned long
 106
 107 /* Define XPNTR to avoid or'ing with DATA_SEG_BITS */
 108 #undef DATA_SEG_BITS
 109
 110 #ifdef __FreeBSD__
 111
 112 /* The libraries for binaries native to the build host's architecture are
 113    installed under /usr/lib in FreeBSD, and the ones that need special paths
 114    are 32-bit compatibility libraries (installed under /usr/lib32).  To build
 115    a native binary of Emacs on FreeBSD/amd64 we can just point to /usr/lib.  */
 116
 117 #undef START_FILES
 118 #define START_FILES pre-crt0.o /usr/lib/crt1.o /usr/lib/crti.o
 119
 120 /* The duplicate -lgcc is intentional in the definition of LIB_STANDARD.
 121    The reason is that some functions in libgcc.a call functions from libc.a,
 122    and some libc.a functions need functions from libgcc.a.  Since most
 123    versions of ld are one-pass linkers, we need to mention -lgcc twice,
 124    or else we risk getting unresolved externals.  */
 125 #undef LIB_STANDARD
 126 #define LIB_STANDARD -lgcc -lc -lgcc /usr/lib/crtn.o
 127
 128 #elif defined(__OpenBSD__)
 129
 130 #undef START_FILES
 131 #define START_FILES pre-crt0.o /usr/lib/crt0.o /usr/lib/crtbegin.o
 132 #undef LIB_STANDARD
 133 #define LIB_STANDARD -lgcc -lc -lgcc /usr/lib/crtend.o
 134
 135 #elif defined(__NetBSD__)
 136
 137 /* LIB_STANDARD and START_FILES set correctly in s/netbsd.h */
 138
 139 #elif defined(sun)
 140
 141 #undef START_FILES
 142 #undef LIB_STANDARD
 143
 144 #else /* !__OpenBSD__ && !__FreeBSD__ && !__NetBSD__ && !sun */
 145
 146 #undef START_FILES
 147 #ifdef HAVE_LIB64_DIR
 148 #define START_FILES pre-crt0.o /usr/lib64/crt1.o /usr/lib64/crti.o
 149 #else
 150 #define START_FILES pre-crt0.o /usr/lib/crt1.o /usr/lib/crti.o
 151 #endif
 152
 153 /* The duplicate -lgcc is intentional in the definition of LIB_STANDARD.
 154    The reason is that some functions in libgcc.a call functions from libc.a,
 155    and some libc.a functions need functions from libgcc.a.  Since most
 156    versions of ld are one-pass linkers, we need to mention -lgcc twice,
 157    or else we risk getting unresolved externals.  */
 158 #undef LIB_STANDARD
 159 #ifdef HAVE_LIB64_DIR
 160 #define LIB_STANDARD -lgcc -lc -lgcc /usr/lib64/crtn.o
 161 #else
 162 #define LIB_STANDARD -lgcc -lc -lgcc /usr/lib/crtn.o
 163 #endif
 164
 165 #endif /* __FreeBSD__ */
 166 #endif /* !i386 */
 167
 168 /* arch-tag: 8a5e001d-e12e-4692-a3a6-0b15ba271c6e
 169    (do not change this comment) */