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 2, 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 NO_ARG_ARRAY if you cannot take the address of the first of a
  35  * group of arguments and treat it as an array of the arguments.  */
  36
  37 #define NO_ARG_ARRAY
  38
  39 /* Now define a symbol for the cpu type, if your compiler
  40    does not define it automatically.  */
  41
  42 #ifndef IBMAIX
  43 #define IBMAIX
  44 #endif
  45
  46 /* Use type int rather than a union, to represent Lisp_Object */
  47 /* This is desirable for most machines.  */
  48
  49 #define NO_UNION_TYPE
  50
  51 /* No load average information appears in the AIX kernel.  VRM has this
  52    info, and if anyone desires they should fix fns.c to get it out of VRM */
  53
  54 /* Define CANNOT_DUMP on machines where unexec does not work.
  55    Then the function dump-emacs will not be defined
  56    and temacs will do (load "loadup") automatically unless told otherwise.  */
  57
  58 /* #define CANNOT_DUMP */
  59
  60 /* Define addresses, macros, change some setup for dump */
  61
  62 #undef COFF
  63 #define NO_REMAP
  64 #undef static
  65   /* Since NO_REMAP, problem with statics doesn't exist */
  66
  67 #define TEXT_START 0x10000000
  68 #define TEXT_END 0
  69 #define DATA_START 0x20000000
  70 #define DATA_END 0
  71
  72 /* The data segment in this machine always starts at address 0x20000000.
  73    An address of data cannot be stored correctly in a Lisp object;
  74    we always lose the high bits.  We must tell XPNTR to add them back.  */
  75
  76 #define DATA_SEG_BITS 0x20000000
  77
  78 #define N_BADMAG(x) BADMAG(x)
  79 #define N_TXTOFF(x) A_TEXTPOS(x)
  80 #define N_SYMOFF(x) A_SYMPOS(x)
  81 #define A_TEXT_OFFSET(HDR) sizeof(HDR)
  82 #define ADJUST_EXEC_HEADER \
  83     unexec_text_start += sizeof(hdr); \
  84     unexec_data_start = ohdr.a_dbase
  85 #undef ADDR_CORRECT
  86 #define ADDR_CORRECT(x) ((int)(x))
  87
  88 /* This is the offset of the executable's text, from the start of the file.  */
  89
  90 #define A_TEXT_SEEK(HDR) (N_TXTOFF (hdr) + sizeof (hdr))
  91
  92 /* Define C_ALLOCA if this machine does not support a true alloca
  93    and the one written in C should be used instead.
  94    Define HAVE_ALLOCA to say that the system provides a properly
  95    working alloca function and it should be used.
  96    Define neither one if an assembler-language alloca
  97    in the file alloca.s should be used.  */
  98
  99 #define C_ALLOCA
 100 #define STACK_DIRECTION -1 /* tell alloca.c which way it grows */
 101
 102 /* AIX has PTYs, so define here, along with macros needed to make them work. */
 103
 104 #define HAVE_PTYS
 105 #define PTY_ITERATION for (i=0; i<256; i++)
 106 #define PTY_NAME_SPRINTF sprintf (ptyname, "/dev/ptc%d", i);
 107
 108 #define PTY_TTY_NAME_SPRINTF                            \
 109 { /* Check that server side not already open */         \
 110   if ((ioctl (*ptyv, PTYSTATUS, 0) & 0xFFFF) != 0)      \
 111     {                                                   \
 112       close (*ptyv);                                    \
 113       continue;                                         \
 114     }                                                   \
 115   /* And finally to be sure we can open it later */     \
 116   sprintf (ptyname, "/dev/pts%d", i);                   \
 117   signal (SIGHUP,SIG_IGN);                              \
 118 }     /* ignore hangup at process end */
 119
 120 /* TIOCNOTTY doesn't occur on AIX, but the rest
 121    of the conditionalized code in process.c does
 122    the right thing if we fake this out.  */
 123 #define TIOCNOTTY IOCTYPE
 124
 125 /* AIX has IPC. It also has sockets, and either can be used for client/server.
 126    I would suggest the client/server code be changed to use HAVE_SOCKETS rather
 127    than BSD as the conditional if sockets provide any advantages. */
 128
 129 #define HAVE_SYSVIPC
 130
 131 /* AIX has sockets */
 132
 133 #define HAVE_SOCKETS
 134 /* #define SKTPAIR */ /* SKTPAIR works, but what is advantage over pipes? */
 135
 136 /* Specify the font for X to use.  */
 137
 138 #define X_DEFAULT_FONT "Rom14.500"
 139
 140 /* Here override various assumptions in ymakefile */
 141
 142 /* On AIX 2.2.1, use these definitions instead
 143 #define C_SWITCH_MACHINE -I/usr/include -Nn2000
 144 #define LIBS_MACHINE -lX -lrts
 145 */
 146
 147 #define C_SWITCH_MACHINE -I/usr/include -I/usr/include/bsd -Nn2000
 148 #define LIBS_MACHINE -lXMenu -lX -lsock -lbsd -lrts
 149
 150 #define OBJECTS_MACHINE hftctl.o
 151 #define START_FILES /lib/crt0.o
 152 /* -lXMenu, -lX must precede -lsock, -lbsd */
 153 #define LD_SWITCH_MACHINE -n -T0x10000000 -K -e start
 154
 155 #if 0 /* I refuse to promulgate a recommendation that would make
 156          users unable to debug - RMS.  */
 157 /* delete the following line to foil optimization, enable debugging */
 158 #define C_DEBUG_SWITCH -O
 159 #endif
 160
 161
 162 /* Setup to do some things BSD way - these won't work previous to AIX 2.1.2 */
 163
 164 #include </usr/include/bsd/BSDtoAIX.h>
 165 #define BSTRING
 166 #define HAVE_GETTIMEOFDAY
 167 #define HAVE_VFORK
 168
 169 /* AIX utimes allegedly causes SIGSEGV.  */
 170 #undef HAVE_UTIMES /* override configuration decision */
 171
 172 /* AIX defines FIONREAD, but it does not work.  */
 173 #define BROKEN_FIONREAD
 174
 175 /* rocky@watson.ibm.com says this is needed.  */
 176 #define HAVE_FTIME