gcc/config/sparc/pbd.h

   1 /* Definitions of target machine for GNU compiler, Citicorp/TTI Unicom PBD
   2    version (using GAS and COFF (encapsulated is unacceptable) )
   3    Copyright (C) 1990, 1996, 2000 Free Software Foundation, Inc.
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU CC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22
  23 /* Names to predefine in the preprocessor for this target machine.  */
  24
  25 #undef CPP_PREDEFINES
  26 #define CPP_PREDEFINES "-Dsparc -DUnicomPBD -Dunix -D__GCC_NEW_VARARGS__ -Asystem=unix -Acpu=sparc -Amachine=sparc"
  27
  28 /* We want DBX format for use with gdb under COFF.  */
  29
  30 #define DBX_DEBUGGING_INFO 1
  31
  32 /* Generate calls to memcpy, memcmp and memset.  */
  33
  34 #define TARGET_MEM_FUNCTIONS
  35
  36 /* we use /lib/libp/lib*  when profiling */
  37
  38 #undef LIB_SPEC
  39 #define LIB_SPEC "%{p:-L/usr/lib/libp} %{pg:-L/usr/lib/libp} -lc"
  40
  41
  42 /* Use crt1.o as a startup file and crtn.o as a closing file.  */
  43 /*
  44  * The loader directive file gcc.ifile defines how to merge the constructor
  45  * sections into the data section.  Also, since gas only puts out those
  46  * sections in response to N_SETT stabs, and does not (yet) have a
  47  * ".sections" directive, gcc.ifile also defines the list symbols
  48  * __DTOR_LIST__ and __CTOR_LIST__.
  49  *
  50  * Finally, we must explicitly specify the file from libgcc.a that defines
  51  * exit(), otherwise if the user specifies (for example) "-lc_s" on the
  52  * command line, the wrong exit() will be used and global destructors will
  53  * not get called .
  54  */
  55
  56 #define STARTFILE_SPEC \
  57 "%{!r: gcc.ifile%s} %{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}} \
  58 %{!r:_exit.o%s}"
  59
  60 #define ENDFILE_SPEC "crtn.o%s"
  61
  62 /* LINK_SPEC is needed only for SunOS 4.  */
  63
  64 #undef LINK_SPEC
  65
  66 /* Although the gas we use can create .ctor and .dtor sections from N_SETT
  67    stabs, it does not support section directives, so we need to have the loader
  68    define the lists.
  69    */
  70 #define CTOR_LISTS_DEFINED_EXTERNALLY
  71
  72 /* similar to default, but allows for the table defined by ld with gcc.ifile.
  73    nptrs is always 0.  So we need to instead check that __DTOR_LIST__[1] != 0.
  74    The old check is left in so that the same macro can be used if and when
  75    a future version of gas does support section directives.  */
  76
  77 #define DO_GLOBAL_DTORS_BODY {int nptrs = *(int *)__DTOR_LIST__; int i; \
  78   if (nptrs == -1 || (__DTOR_LIST__[0] == 0 && __DTOR_LIST__[1] != 0))  \
  79     for (nptrs = 0; __DTOR_LIST__[nptrs + 1] != 0; nptrs++);            \
  80   for (i = nptrs; i >= 1; i--)                                          \
  81     __DTOR_LIST__[i] (); }
  82
  83 /*
  84  * Here is an example gcc.ifile.  I've tested it on PBD sparc
  85  * systems. The NEXT(0x200000) works on just about all 386 and m68k systems,
  86  * but can be reduced to any power of 2 that is >= NBPS (0x40000 on a pbd).
  87
  88    SECTIONS {
  89        .text BIND(0x41000200) BLOCK (0x200) :
  90                 { *(.init) *(.text) vfork = fork; *(.fini) }
  91
  92         GROUP BIND( NEXT(0x200000) + ADDR(.text) + SIZEOF(.text)):
  93         {      .data : { __CTOR_LIST__ = . ; . += 4; *(.ctor) . += 4 ;
  94                          __DTOR_LIST__ = . ; . += 4; *(.dtor) . += 4 ; }
  95                .bss : { }
  96        }
  97   }
  98  */
  99
 100 /* The prefix to add to user-visible assembler symbols.  */
 101
 102 #undef USER_LABEL_PREFIX
 103 #define USER_LABEL_PREFIX ""
 104
 105 /* fixes: */
 106 /*
 107  *  Internal labels are prefixed with a period.
 108  */
 109
 110 #undef  LOCAL_LABEL_PREFIX
 111 #define LOCAL_LABEL_PREFIX  "."
 112
 113 /* This is how to store into the string LABEL
 114    the symbol_ref name of an internal numbered label where
 115    PREFIX is the class of label and NUM is the number within the class.
 116    This is suitable for output with `assemble_name'.  */
 117
 118 #undef ASM_GENERATE_INTERNAL_LABEL
 119
 120 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)                   \
 121         sprintf (LABEL, "*.%s%ld", PREFIX, (long)(NUM))
 122
 123
 124 /* This is how to output an internal numbered label where
 125    PREFIX is the class of label and NUM is the number within the class.  */
 126
 127 #undef  ASM_OUTPUT_INTERNAL_LABEL
 128 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)                      \
 129         fprintf (FILE, ".%s%d:\n", PREFIX, NUM)
 130
 131 /* This is how to output an element of a case-vector that is relative.  */
 132
 133 #undef  ASM_OUTPUT_ADDR_DIFF_ELT
 134 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL)  \
 135   fprintf (FILE, "\t.word .L%d-.L%d\n", VALUE, REL)
 136
 137 /* This is how to output an element of a case-vector that is absolute.
 138    (The 68000 does not use such vectors,
 139    but we must define this macro anyway.)  */
 140
 141 #undef ASM_OUTPUT_ADDR_VEC_ELT
 142 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)  \
 143   fprintf (FILE, "\t.word .L%d\n", VALUE)
 144
 145 /* This is needed for SunOS 4.0, and should not hurt for 3.2
 146    versions either.  */
 147 #undef ASM_OUTPUT_SOURCE_LINE
 148 #define ASM_OUTPUT_SOURCE_LINE(file, line)              \
 149   { static int sym_lineno = 1;                          \
 150     fprintf (file, ".stabn 68,0,%d,.LM%d\n.LM%d:\n",    \
 151              line, sym_lineno, sym_lineno);             \
 152     sym_lineno += 1; }
 153
 154 #define ASM_INT_OP "\t.long "