src/m/ibmrt-aix.h

   1 /* RTPC AIX machine/system dependent defines
   2    Copyright (C) 1988 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="usg5-2-2"  */
  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
  42 #define NO_ARG_ARRAY
  43
  44 /* Now define a symbol for the cpu type, if your compiler
  45    does not define it automatically.  */
  46
  47 #ifndef IBMAIX
  48 #define IBMAIX
  49 #endif
  50
  51 /* Use type int rather than a union, to represent Lisp_Object */
  52 /* This is desirable for most machines.  */
  53
  54 #define NO_UNION_TYPE
  55
  56 /* No load average information appears in the AIX kernel.  VRM has this
  57    info, and if anyone desires they should fix fns.c to get it out of VRM */
  58
  59 /* Define CANNOT_DUMP on machines where unexec does not work.
  60    Then the function dump-emacs will not be defined
  61    and temacs will do (load "loadup") automatically unless told otherwise.  */
  62
  63 /* #define CANNOT_DUMP */
  64
  65 /* Define addresses, macros, change some setup for dump */
  66
  67 #undef COFF
  68 #define NO_REMAP
  69 #undef static
  70   /* Since NO_REMAP, problem with statics doesn't exist */
  71
  72 #define TEXT_START 0x10000000
  73 #define TEXT_END 0
  74 #define DATA_START 0x20000000
  75 #define DATA_END 0
  76
  77 /* The data segment in this machine always starts at address 0x20000000.
  78    An address of data cannot be stored correctly in a Lisp object;
  79    we always lose the high bits.  We must tell XPNTR to add them back.  */
  80
  81 #define DATA_SEG_BITS 0x20000000
  82
  83 #define N_BADMAG(x) BADMAG(x)
  84 #define N_TXTOFF(x) A_TEXTPOS(x)
  85 #define N_SYMOFF(x) A_SYMPOS(x)
  86 #define A_TEXT_OFFSET(HDR) sizeof(HDR)
  87 #define ADJUST_EXEC_HEADER \
  88     unexec_text_start += sizeof(hdr); \
  89     unexec_data_start = ohdr.a_dbase
  90 #undef ADDR_CORRECT
  91 #define ADDR_CORRECT(x) ((int)(x))
  92
  93 /* This is the offset of the executable's text, from the start of the file.  */
  94
  95 #define A_TEXT_SEEK(HDR) (N_TXTOFF (hdr) + sizeof (hdr))
  96
  97 /* Define C_ALLOCA if this machine does not support a true alloca
  98    and the one written in C should be used instead.
  99    Define HAVE_ALLOCA to say that the system provides a properly
 100    working alloca function and it should be used.
 101    Define neither one if an assembler-language alloca
 102    in the file alloca.s should be used.  */
 103
 104 #define C_ALLOCA
 105 #define STACK_DIRECTION -1 /* tell alloca.c which way it grows */
 106
 107 /* AIX has PTYs, so define here, along with macros needed to make them work. */
 108
 109 #define HAVE_PTYS
 110 #define PTY_ITERATION for (i=0; i<256; i++)
 111 #define PTY_NAME_SPRINTF sprintf (ptyname, "/dev/ptc%d", i);
 112
 113 #define PTY_TTY_NAME_SPRINTF                            \
 114 { /* Check that server side not already open */         \
 115   if ((ioctl (*ptyv, PTYSTATUS, 0) & 0xFFFF) != 0)      \
 116     {                                                   \
 117       close (*ptyv);                                    \
 118       continue;                                         \
 119     }                                                   \
 120   /* And finally to be sure we can open it later */     \
 121   sprintf (ptyname, "/dev/pts%d", i);                   \
 122   signal (SIGHUP,SIG_IGN);                              \
 123 }     /* ignore hangup at process end */
 124
 125 /* TIOCNOTTY doesn't occur on AIX, but the rest
 126    of the conditionalized code in process.c does
 127    the right thing if we fake this out.  */
 128 #define TIOCNOTTY IOCTYPE
 129
 130 /* AIX has IPC. It also has sockets, and either can be used for client/server.
 131    I would suggest the client/server code be changed to use HAVE_SOCKETS rather
 132    than BSD as the conditional if sockets provide any advantages. */
 133
 134 #define HAVE_SYSVIPC
 135
 136 /* AIX has sockets */
 137
 138 #define HAVE_SOCKETS
 139 /* #define SKTPAIR */ /* SKTPAIR works, but what is advantage over pipes? */
 140
 141 /* Specify the font for X to use.  */
 142
 143 #define X_DEFAULT_FONT "Rom14.500"
 144
 145 /* Here override various assumptions in ymakefile */
 146
 147 /* On AIX 2.2.1, use these definitions instead
 148 #define C_SWITCH_MACHINE -I/usr/include -Nn2000
 149 #define LIBS_MACHINE -lX -lrts
 150 */
 151
 152 #define C_SWITCH_MACHINE -I/usr/include -I/usr/include/bsd -Nn2000
 153 #define LIBS_MACHINE -lXMenu -lX -lsock -lbsd -lrts
 154
 155 #define OBJECTS_MACHINE hftctl.o
 156 #define START_FILES /lib/crt0.o
 157 /* -lXMenu, -lX must precede -lsock, -lbsd */
 158 #define LD_SWITCH_MACHINE -n -T0x10000000 -K -e start
 159
 160 #if 0 /* I refuse to promulgate a recommendation that would make
 161          users unable to debug - RMS.  */
 162 /* delete the following line to foil optimization, enable debugging */
 163 #define C_DEBUG_SWITCH -O
 164 #endif
 165
 166
 167 /* Setup to do some things BSD way - these won't work previous to AIX 2.1.2 */
 168
 169 #include </usr/include/bsd/BSDtoAIX.h>
 170 #define BSTRING
 171 #define HAVE_DUP2
 172 #define HAVE_GETTIMEOFDAY
 173 #define HAVE_SELECT
 174 #define HAVE_TIMEVAL
 175 #define HAVE_VFORK
 176
 177 /* But don't use utimes() -- it causes SIGSEGV!  Use utime() instead. */
 178 #define USE_UTIME
 179
 180 /* AIX defines FIONREAD, but it does not work.  */
 181 #define BROKEN_FIONREAD