gnu/dist/gcc4/gcc/config/pa/pa-netbsd.h

   1 /* Definitions for PA_RISC with ELF format
   2    Copyright 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC 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 GCC 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 GCC; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21
  22 /* A C expression whose value is RTL representing the location of the
  23    incoming return address at the beginning of any function, before the
  24    prologue.  You only need to define this macro if you want to support
  25    call frame debugging information like that provided by DWARF 2.  */
  26 #define INCOMING_RETURN_ADDR_RTX (gen_rtx_REG (word_mode, 2))
  27 #define DWARF_FRAME_RETURN_COLUMN (DWARF_FRAME_REGNUM (2))
  28
  29 /* This macro chooses the encoding of pointers embedded in the exception
  30    handling sections.  If at all possible, this should be defined such
  31    that the exception handling section will not require dynamic relocations,
  32    and so may be read-only.
  33
  34    FIXME: We use DW_EH_PE_aligned to output a PLABEL constructor for
  35    global function pointers.  */
  36 /* XXXMRG: should we use the version in <pa/pa.h>?  */
  37 #undef ASM_PREFERRED_EH_DATA_FORMAT
  38 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)                       \
  39   (CODE == 2 && GLOBAL ? DW_EH_PE_aligned : DW_EH_PE_absptr)
  40
  41 /* Handle special EH pointer encodings.  Absolute, pc-relative, and
  42    indirect are handled automatically.  Since pc-relative encoding is
  43    not possible on the PA and we don't have the infrastructure for
  44    data relative encoding, we use aligned plabels for global function
  45    pointers.  */
  46 /* XXXMRG: should we use the version in <pa/pa.h>?  */
  47 #undef ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX
  48 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(FILE, ENCODING, SIZE, ADDR, DONE) \
  49   do {                                                                  \
  50     if (((ENCODING) & 0x0F) == DW_EH_PE_aligned)                        \
  51       {                                                                 \
  52         fputs (integer_asm_op (SIZE, FALSE), FILE);                     \
  53         fputs ("P%", FILE);                                             \
  54         assemble_name (FILE, XSTR (ADDR, 0));                           \
  55         goto DONE;                                                      \
  56       }                                                                 \
  57     } while (0)
  58
  59 #undef TARGET_OS_CPP_BUILTINS
  60 #define TARGET_OS_CPP_BUILTINS()                \
  61   do                                            \
  62     {                                           \
  63       NETBSD_OS_CPP_BUILTINS_ELF();             \
  64     }                                           \
  65   while (0)
  66
  67 #undef CPP_SPEC
  68 #define CPP_SPEC NETBSD_CPP_SPEC
  69
  70 #undef ASM_SPEC
  71 #define ASM_SPEC \
  72   "%{v:-V} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"
  73
  74 #undef EXTRA_SPECS
  75 #define EXTRA_SPECS \
  76   { "netbsd_entry_point",       NETBSD_ENTRY_POINT },
  77
  78 #define NETBSD_ENTRY_POINT "__start"
  79
  80 #undef LINK_SPEC
  81 #define LINK_SPEC NETBSD_LINK_SPEC_ELF
  82
  83 /* NetBSD profiling functions don't need gcc to allocate counters.  */
  84 #define NO_DEFERRED_PROFILE_COUNTERS 1
  85
  86 /* Define the strings used for the special svr4 .type and .size directives.
  87    These strings generally do not vary from one system running svr4 to
  88    another, but if a given system (e.g. m88k running svr) needs to use
  89    different pseudo-op names for these, they may be overridden in the
  90    file which includes this one.  */
  91
  92 #undef STRING_ASM_OP
  93 #define STRING_ASM_OP   "\t.stringz"
  94
  95 #define TEXT_SECTION_ASM_OP "\t.text"
  96 #define DATA_SECTION_ASM_OP "\t.data"
  97 #define BSS_SECTION_ASM_OP "\t.section\t.bss"
  98
  99 #define TARGET_ASM_FILE_START pa_linux_file_start
 100
 101 /* We want local labels to start with period if made with asm_fprintf.  */
 102 #undef LOCAL_LABEL_PREFIX
 103 #define LOCAL_LABEL_PREFIX "."
 104
 105 /* Define these to generate the Linux/ELF/SysV style of internal
 106    labels all the time - i.e. to be compatible with
 107    ASM_GENERATE_INTERNAL_LABEL in <elfos.h>.  Compare these with the
 108    ones in pa.h and note the lack of dollar signs in these.  FIXME:
 109    shouldn't we fix pa.h to use ASM_GENERATE_INTERNAL_LABEL instead? */
 110
 111 #undef ASM_OUTPUT_ADDR_VEC_ELT
 112 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
 113   if (TARGET_BIG_SWITCH)                                        \
 114     fprintf (FILE, "\t.word .L%d\n", VALUE);                    \
 115   else                                                          \
 116     fprintf (FILE, "\tb .L%d\n\tnop\n", VALUE)
 117
 118 #undef ASM_OUTPUT_ADDR_DIFF_ELT
 119 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
 120   if (TARGET_BIG_SWITCH)                                        \
 121     fprintf (FILE, "\t.word .L%d-.L%d\n", VALUE, REL);          \
 122   else                                                          \
 123     fprintf (FILE, "\tb .L%d\n\tnop\n", VALUE)
 124
 125 /* Use the default.  */
 126 #undef ASM_OUTPUT_LABEL
 127
 128 /* NOTE: (*targetm.asm_out.internal_label)() is defined for us by elfos.h, and
 129    does what we want (i.e. uses colons).  It must be compatible with
 130    ASM_GENERATE_INTERNAL_LABEL(), so do not define it here.  */
 131
 132 /* Use the default.  */
 133 #undef TARGET_ASM_GLOBALIZE_LABEL
 134 /* Globalizing directive for a label.  */
 135 #define GLOBAL_ASM_OP ".globl "
 136
 137 /* FIXME: Hacked from the <elfos.h> one so that we avoid multiple
 138    labels in a function declaration (since pa.c seems determined to do
 139    it differently)  */
 140
 141 #undef ASM_DECLARE_FUNCTION_NAME
 142 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)             \
 143   do                                                            \
 144     {                                                           \
 145       ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function");       \
 146       ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL));            \
 147     }                                                           \
 148   while (0)
 149
 150 /* As well as globalizing the label, we need to encode the label
 151    to ensure a plabel is generated in an indirect call.  */
 152
 153 #undef ASM_OUTPUT_EXTERNAL_LIBCALL
 154 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN)                  \
 155   do                                                            \
 156     {                                                           \
 157       if (!FUNCTION_NAME_P (XSTR (FUN, 0)))                     \
 158         hppa_encode_label (FUN);                                \
 159       (*targetm.asm_out.globalize_label) (FILE, XSTR (FUN, 0)); \
 160     }                                                           \
 161   while (0)
 162
 163 /* NetBSD always uses gas.  */
 164 #undef TARGET_GAS
 165 #define TARGET_GAS 1
 166
 167 /* Use long int for these type to make hppa64 compatibility easier.  */
 168 #undef SIZE_TYPE
 169 #define SIZE_TYPE "long unsigned int"
 170
 171 #undef PTRDIFF_TYPE
 172 #define PTRDIFF_TYPE "long int"