src/m/ibmrt-aix.h

   1 /* RTPC AIX machine/system dependent defines
   2    Copyright (C) 1988, 1999 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, Inc., 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21
  22 /* The following line tells the configuration script what sort of
  23    operating system this machine is likely to run.
  24    USUAL-OPSYS="usg5-2-2"  */
  25
  26 /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
  27    is the most significant byte.  */
  28
  29 #define WORDS_BIG_ENDIAN
  30
  31 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  32  * group of arguments and treat it as an array of the arguments.  */
  33
  34 #define NO_ARG_ARRAY
  35
  36 /* Now define a symbol for the cpu type, if your compiler
  37    does not define it automatically.  */
  38
  39 #ifndef IBMAIX
  40 #define IBMAIX
  41 #endif
  42
  43 /* Use type int rather than a union, to represent Lisp_Object */
  44 /* This is desirable for most machines.  */
  45
  46 #define NO_UNION_TYPE
  47
  48 /* No load average information appears in the AIX kernel.  VRM has this
  49    info, and if anyone desires they should fix fns.c to get it out of VRM */
  50
  51 /* Define CANNOT_DUMP on machines where unexec does not work.
  52    Then the function dump-emacs will not be defined
  53    and temacs will do (load "loadup") automatically unless told otherwise.  */
  54
  55 /* #define CANNOT_DUMP */
  56
  57 /* Define addresses, macros, change some setup for dump */
  58
  59 #undef COFF
  60 #define NO_REMAP
  61 #undef static
  62   /* Since NO_REMAP, problem with statics doesn't exist */
  63
  64 #define TEXT_START 0x10000000
  65 #define TEXT_END 0
  66 #define DATA_START 0x20000000
  67 #define DATA_END 0
  68
  69 /* The data segment in this machine always starts at address 0x20000000.
  70    An address of data cannot be stored correctly in a Lisp object;
  71    we always lose the high bits.  We must tell XPNTR to add them back.  */
  72
  73 #define DATA_SEG_BITS 0x20000000
  74
  75 #define N_BADMAG(x) BADMAG(x)
  76 #define N_TXTOFF(x) A_TEXTPOS(x)
  77 #define N_SYMOFF(x) A_SYMPOS(x)
  78 #define A_TEXT_OFFSET(HDR) sizeof(HDR)
  79 #define ADJUST_EXEC_HEADER \
  80     unexec_text_start += sizeof(hdr); \
  81     unexec_data_start = ohdr.a_dbase
  82 #undef ADDR_CORRECT
  83 #define ADDR_CORRECT(x) ((int)(x))
  84
  85 /* This is the offset of the executable's text, from the start of the file.  */
  86
  87 #define A_TEXT_SEEK(HDR) (N_TXTOFF (hdr) + sizeof (hdr))
  88
  89 /* Define C_ALLOCA if this machine does not support a true alloca
  90    and the one written in C should be used instead.
  91    Define HAVE_ALLOCA to say that the system provides a properly
  92    working alloca function and it should be used.
  93    Define neither one if an assembler-language alloca
  94    in the file alloca.s should be used.  */
  95
  96 #define C_ALLOCA
  97 #define STACK_DIRECTION -1 /* tell alloca.c which way it grows */
  98
  99 /* AIX has PTYs, so define here, along with macros needed to make them work. */
 100
 101 #define HAVE_PTYS
 102 #define PTY_ITERATION for (i=0; i<256; i++)
 103 #define PTY_NAME_SPRINTF sprintf (ptyname, "/dev/ptc%d", i);
 104
 105 #define PTY_TTY_NAME_SPRINTF                            \
 106 { /* Check that server side not already open */         \
 107   if ((ioctl (*ptyv, PTYSTATUS, 0) & 0xFFFF) != 0)      \
 108     {                                                   \
 109       emacs_close (*ptyv);                              \
 110       continue;                                         \
 111     }                                                   \
 112   /* And finally to be sure we can open it later */     \
 113   sprintf (ptyname, "/dev/pts%d", i);                   \
 114   signal (SIGHUP,SIG_IGN);                              \
 115 }     /* ignore hangup at process end */
 116
 117 /* TIOCNOTTY doesn't occur on AIX, but the rest
 118    of the conditionalized code in process.c does
 119    the right thing if we fake this out.  */
 120 #define TIOCNOTTY IOCTYPE
 121
 122 /* AIX has IPC. It also has sockets, and either can be used for client/server.
 123    I would suggest the client/server code be changed to use HAVE_SOCKETS rather
 124    than BSD_SYSTEM as the conditional if sockets provide any advantages. */
 125
 126 #define HAVE_SYSVIPC
 127
 128 /* AIX has sockets */
 129
 130 #define HAVE_SOCKETS
 131 /* #define SKTPAIR */ /* SKTPAIR works, but what is advantage over pipes? */
 132
 133 /* Specify the font for X to use.  */
 134
 135 #define X_DEFAULT_FONT "Rom14.500"
 136
 137 /* Here override various assumptions in ymakefile */
 138
 139 /* On AIX 2.2.1, use these definitions instead
 140 #define C_SWITCH_MACHINE -I/usr/include -Nn2000
 141 #define LIBS_MACHINE -lX -lrts
 142 */
 143
 144 #define C_SWITCH_MACHINE -I/usr/include -I/usr/include/bsd -Nn2000
 145 #define LIBS_MACHINE -lXMenu -lX -lsock -lbsd -lrts
 146
 147 #define OBJECTS_MACHINE hftctl.o
 148 #define START_FILES /lib/crt0.o
 149 /* -lXMenu, -lX must precede -lsock, -lbsd */
 150 #define LD_SWITCH_MACHINE -n -T0x10000000 -K -e start
 151
 152 #if 0 /* I refuse to promulgate a recommendation that would make
 153          users unable to debug - RMS.  */
 154 /* delete the following line to foil optimization, enable debugging */
 155 #define C_DEBUG_SWITCH -O
 156 #endif
 157
 158
 159 /* Setup to do some things BSD way - these won't work previous to AIX 2.1.2 */
 160
 161 #include </usr/include/bsd/BSDtoAIX.h>
 162 #define BSTRING
 163 #define HAVE_GETTIMEOFDAY
 164 #define HAVE_VFORK
 165
 166 /* AIX utimes allegedly causes SIGSEGV.  */
 167 #undef HAVE_UTIMES /* override configuration decision */
 168
 169 /* AIX defines FIONREAD, but it does not work.  */
 170 #define BROKEN_FIONREAD
 171
 172 /* rocky@watson.ibm.com says this is needed.  */
 173 #define HAVE_FTIME