gcc/config/arm/riscix.h

   1 /* Definitions of target machine for GNU compiler.  ARM RISCiX version.
   2    Copyright (C) 1993, 1994, 1995, 1997, 1999, 2000
   3    Free Software Foundation, Inc.
   4    Contributed by Richard Earnshaw (rwe11@cl.cam.ac.uk), based on original
   5               work by Pieter `Tiggr' Schoenmakers (rcpieter@win.tue.nl)
   6               and Martin Simmons (@harleqn.co.uk).
   7
   8 This file is part of GNU CC.
   9
  10 GNU CC is free software; you can redistribute it and/or modify
  11 it under the terms of the GNU General Public License as published by
  12 the Free Software Foundation; either version 2, or (at your option)
  13 any later version.
  14
  15 GNU CC is distributed in the hope that it will be useful,
  16 but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 GNU General Public License for more details.
  19
  20 You should have received a copy of the GNU General Public License
  21 along with GNU CC; see the file COPYING.  If not, write to
  22 the Free Software Foundation, 59 Temple Place - Suite 330,
  23 Boston, MA 02111-1307, USA.  */
  24
  25 /* Translation to find startup files.  On RISC iX boxes,
  26    crt0, mcrt0 and gcrt0.o are in /usr/lib.  */
  27 #define STARTFILE_SPEC  "\
  28   %{pg:/usr/lib/gcrt0.o%s}\
  29   %{!pg:%{p:/usr/lib/mcrt0.o%s}\
  30         %{!p:/usr/lib/crt0.o%s}}"
  31
  32 /* RISC iX has no concept of -lg */
  33 /* If -static is specified then link with -lc_n */
  34
  35 #ifndef LIB_SPEC
  36 #define LIB_SPEC "\
  37   %{g*:-lg}\
  38   %{!p:%{!pg:%{!static:-lc}%{static:-lc_n}}}\
  39   %{p:-lc_p}\
  40   %{pg:-lc_p}"
  41 #endif
  42
  43 /* The RISC iX assembler never deletes any symbols from the object module;
  44    and, by default, ld doesn't either.  -X causes local symbols starting
  45    with 'L' to be deleted, which is what we want.  */
  46 #ifndef LINK_SPEC
  47 #define LINK_SPEC "-X"
  48 #endif
  49
  50 #ifndef CPP_PREDEFINES
  51 #define CPP_PREDEFINES  \
  52     "-Darm -Driscix -Dunix -Asystem=unix -Acpu=arm -Amachine=arm"
  53 #endif
  54
  55
  56 /* RISCiX has some weird symbol name munging, that is done to the object module
  57    after assembly, which enables multiple libraries to be supported within
  58    one (possibly shared) library.  It basically changes the symbol name of
  59    certain symbols (for example _bcopy is converted to _$bcopy if using BSD)
  60    Symrename's parameters are determined as follows:
  61      -mno-symrename     Don't run symrename
  62      -mbsd      symrename -BSD <file>
  63      -mxopen    symrename -XOPEN <file>
  64      -ansi      symrename - <file>
  65      <none>     symrename -BSD <file>
  66  */
  67
  68 #ifndef ASM_FINAL_SPEC
  69 #if !defined (CROSS_COMPILE)
  70 #define ASM_FINAL_SPEC "\
  71 %{!mno-symrename: \
  72         \n /usr/bin/symrename \
  73         -%{mbsd:%{pedantic:%e-mbsd and -pedantic incompatible}BSD}\
  74 %{mxopen:%{mbsd:%e-mbsd and -mxopen incompatible}\
  75 %{pedantic:%e-mxopen and -pedantic incompatible}XOPEN}\
  76 %{!mbsd:%{!mxopen:%{!ansi:BSD}}} %{c:%{o*:%*}%{!o*:%b.o}}%{!c:%U.o}}"
  77 #endif
  78 #endif
  79
  80 /* None of these is actually used in cc1.  If we don't define them in target
  81    switches cc1 complains about them.  For the sake of argument lets allocate
  82    bit 31 of target flags for such options.  */
  83 #define SUBTARGET_SWITCHES                                              \
  84   {"bsd",          0x80000000, N_("Do symbol renaming for BSD")},       \
  85   {"xopen",        0x80000000, N_("Do symbol renaming for X/OPEN")},    \
  86   {"no-symrename", 0x80000000, N_("Don't do symbol renaming")},
  87
  88
  89 /* Run-time Target Specification.  */
  90 #define TARGET_VERSION  \
  91   fputs (" (ARM/RISCiX)", stderr);
  92
  93 /* This is used in ASM_FILE_START */
  94 #define ARM_OS_NAME "RISCiX"
  95
  96 /* Unsigned chars produces much better code than signed.  */
  97 #define DEFAULT_SIGNED_CHAR  0
  98
  99 /* Some systems use __main in a way incompatible with its use in gcc, in these
 100    cases use the macros NAME__MAIN to give a quoted symbol and SYMBOL__MAIN to
 101    give the same symbol without quotes for an alternative entry point.  You
 102    must define both, or neither. */
 103 #ifndef NAME__MAIN
 104 #define NAME__MAIN "__gccmain"
 105 #define SYMBOL__MAIN __gccmain
 106 #endif
 107
 108 /* size_t is "unsigned int" in RISCiX */
 109 #define SIZE_TYPE "unsigned int"
 110
 111 /* ptrdiff_t is "int" in RISCiX */
 112 #define PTRDIFF_TYPE "int"
 113
 114 /* Maths operation domain error number, EDOM */
 115 #define TARGET_EDOM 33
 116
 117 /* Override the normal default CPU */
 118 #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm2
 119
 120 /* r10 is reserved by RISCiX  */
 121 #define SUBTARGET_CONDITIONAL_REGISTER_USAGE    \
 122   fixed_regs[10] = 1;                           \
 123   call_used_regs[10] = 1;
 124
 125 #include "arm/aout.h"
 126
 127 /* The RISCiX assembler does not understand .set */
 128 #undef SET_ASM_OP
 129
 130 /* Override CPP_SPEC, there's no point handling endianness (and probably
 131    not much point handling apcs_pc), and we want to add the right #defines
 132    when using the include files.  */
 133 #undef CPP_SPEC
 134 #define CPP_SPEC "%(cpp_cpu_arch) %(cpp_apcs_pc) %(cpp_float) \
 135         %{mbsd:%{pedantic:%e-mbsd and -pedantic incompatible} -D_BSD_C} \
 136         %{mxopen:%{mbsd:%e-mbsd and -mxopen incompatible}               \
 137           %{pedantic:%e-mxopen and -pedantic incompatible} -D_XOPEN_C}  \
 138         %{!mbsd:%{!mxopen:%{!ansi: -D_BSD_C}}}"
 139
 140 /* The native RISCiX assembler does not support stabs of any kind; because
 141    the native assembler is not used by the compiler, Acorn didn't feel it was
 142    necessary to put them in!  */
 143
 144 #ifdef DBX_DEBUGGING_INFO
 145 #undef DBX_DEBUGGING_INFO
 146 #endif