gcc/config/arm/riscix.h

   1 /* Definitions of target machine for GNU compiler.  ARM RISCiX version.
   2    Copyright (C) 1993, 1994, 1995, 1997 Free Software Foundation, Inc.
   3    Contributed by Richard Earnshaw (rwe11@cl.cam.ac.uk), based on original
   4               work by Pieter `Tiggr' Schoenmakers (rcpieter@win.tue.nl)
   5               and Martin Simmons (@harleqn.co.uk).
   6
   7 This file is part of GNU CC.
   8
   9 GNU CC is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 2, or (at your option)
  12 any later version.
  13
  14 GNU CC is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with GNU CC; see the file COPYING.  If not, write to
  21 the Free Software Foundation, 59 Temple Place - Suite 330,
  22 Boston, MA 02111-1307, USA.  */
  23
  24 /* Translation to find startup files.  On RISC iX boxes,
  25    crt0, mcrt0 and gcrt0.o are in /usr/lib.  */
  26 #define STARTFILE_SPEC  "\
  27   %{pg:/usr/lib/gcrt0.o%s}\
  28   %{!pg:%{p:/usr/lib/mcrt0.o%s}\
  29         %{!p:/usr/lib/crt0.o%s}}"
  30
  31 /* RISC iX has no concept of -lg */
  32 /* If -static is specified then link with -lc_n */
  33
  34 #ifndef LIB_SPEC
  35 #define LIB_SPEC "\
  36   %{g*:-lg}\
  37   %{!p:%{!pg:%{!static:-lc}%{static:-lc_n}}}\
  38   %{p:-lc_p}\
  39   %{pg:-lc_p}"
  40 #endif
  41
  42 /* The RISC iX assembler never deletes any symbols from the object module;
  43    and, by default, ld doesn't either.  -X causes local symbols starting
  44    with 'L' to be deleted, which is what we want.  */
  45 #ifndef LINK_SPEC
  46 #define LINK_SPEC "-X"
  47 #endif
  48
  49 #ifndef CPP_PREDEFINES
  50 #define CPP_PREDEFINES  \
  51     "-Darm -Driscix -Dunix -Asystem(unix) -Acpu(arm) -Amachine(arm)"
  52 #endif
  53
  54
  55 /* RISCiX has some weird symbol name munging, that is done to the object module
  56    after assembly, which enables multiple libraries to be supported within
  57    one (possibly shared) library.  It basically changes the symbol name of
  58    certain symbols (for example _bcopy is converted to _$bcopy if using BSD)
  59    Symrename's parameters are determined as follows:
  60      -mno-symrename     Don't run symrename
  61      -mbsd      symrename -BSD <file>
  62      -mxopen    symrename -XOPEN <file>
  63      -ansi      symrename - <file>
  64      <none>     symrename -BSD <file>
  65  */
  66
  67 #ifndef ASM_FINAL_SPEC
  68 #if !defined (CROSS_COMPILE)
  69 #define ASM_FINAL_SPEC "\
  70 %{!mno-symrename: \
  71         \n /usr/bin/symrename \
  72         -%{mbsd:%{pedantic:%e-mbsd and -pedantic incompatible}BSD}\
  73 %{mxopen:%{mbsd:%e-mbsd and -mxopen incompatible}\
  74 %{pedantic:%e-mxopen and -pedantic incompatible}XOPEN}\
  75 %{!mbsd:%{!mxopen:%{!ansi:BSD}}} %{c:%{o*:%*}%{!o*:%b.o}}%{!c:%U.o}}"
  76 #endif
  77 #endif
  78
  79 /* None of these is actually used in cc1.  If we don't define them in target
  80    switches cc1 complains about them.  For the sake of argument lets allocate
  81    bit 31 of target flags for such options.  */
  82 #define SUBTARGET_SWITCHES \
  83 {"bsd", 0x80000000}, {"xopen", 0x80000000}, {"no-symrename", 0x80000000},
  84
  85
  86 /* Run-time Target Specification.  */
  87 #define TARGET_VERSION  \
  88   fputs (" (ARM/RISCiX)", stderr);
  89
  90 /* This is used in ASM_FILE_START */
  91 #define ARM_OS_NAME "RISCiX"
  92
  93 /* Unsigned chars produces much better code than signed.  */
  94 #define DEFAULT_SIGNED_CHAR  0
  95
  96 /* Define this if the target system supports the function atexit from the
  97    ANSI C standard.  If this is not defined, and INIT_SECTION_ASM_OP is not
  98    defined, a default exit function will be provided to support C++.
  99    The man page only describes on_exit, but atexit is also there.  */
 100 #define HAVE_ATEXIT 1
 101
 102 /* Some systems use __main in a way incompatible with its use in gcc, in these
 103    cases use the macros NAME__MAIN to give a quoted symbol and SYMBOL__MAIN to
 104    give the same symbol without quotes for an alternative entry point.  You
 105    must define both, or neither. */
 106 #ifndef NAME__MAIN
 107 #define NAME__MAIN "__gccmain"
 108 #define SYMBOL__MAIN __gccmain
 109 #endif
 110
 111 /* size_t is "unsigned int" in RISCiX */
 112 #define SIZE_TYPE "unsigned int"
 113
 114 /* ptrdiff_t is "int" in RISCiX */
 115 #define PTRDIFF_TYPE "int"
 116
 117 /* Maths operation domain error number, EDOM */
 118 #define TARGET_EDOM 33
 119
 120 /* Override the normal default CPU */
 121 #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm2
 122
 123 /* r10 is reserved by RISCiX  */
 124 #define SUBTARGET_CONDITIONAL_REGISTER_USAGE    \
 125   fixed_regs[10] = 1;                           \
 126   call_used_regs[10] = 1;
 127
 128 #include "arm/aout.h"
 129
 130 /* The RISCiX assembler does not understand .set */
 131 #undef SET_ASM_OP
 132
 133 /* Override CPP_SPEC, there's no point handling endianness (and probably
 134    not much point handling apcs_pc), and we want to add the right #defines
 135    when using the include files.  */
 136 #undef CPP_SPEC
 137 #define CPP_SPEC "%(cpp_cpu_arch) %(cpp_apcs_pc) %(cpp_float) \
 138         %{mbsd:%{pedantic:%e-mbsd and -pedantic incompatible} -D_BSD_C} \
 139         %{mxopen:%{mbsd:%e-mbsd and -mxopen incompatible}               \
 140           %{pedantic:%e-mxopen and -pedantic incompatible} -D_XOPEN_C}  \
 141         %{!mbsd:%{!mxopen:%{!ansi: -D_BSD_C}}}"
 142
 143 /* The native RISCiX assembler does not support stabs of any kind; because
 144    the native assembler is not used by the compiler, Acorn didn't feel it was
 145    necessary to put them in!  */
 146
 147 #ifdef DBX_DEBUGGING_INFO
 148 #undef DBX_DEBUGGING_INFO
 149 #endif