gnu/dist/gcc4/gcc/config/vax/elf.h

   1 /* Target definitions for GNU compiler for VAX using ELF
   2    Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc.
   3    Contributed by Matt Thomas <matt@3am-software.com>
   4
   5 This file is part of GCC.
   6
   7 GCC 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 GCC 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 GCC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  20 Boston, MA 02110-1301, USA.  */
  21
  22 #undef TARGET_ELF
  23 #define TARGET_ELF 1
  24
  25 #undef REGISTER_PREFIX
  26 #undef REGISTER_NAMES
  27 #define REGISTER_PREFIX "%"
  28 #define REGISTER_NAMES \
  29   { "%r0", "%r1",  "%r2",  "%r3", "%r4", "%r5", "%r6", "%r7", \
  30     "%r8", "%r9", "%r10", "%r11", "%ap", "%fp", "%sp", "%pc", }
  31
  32 #undef SIZE_TYPE
  33 #define SIZE_TYPE "long unsigned int"
  34
  35 #undef PTRDIFF_TYPE
  36 #define PTRDIFF_TYPE "long int"
  37
  38 /* Profiling routine.  */
  39 #undef VAX_FUNCTION_PROFILER_NAME
  40 #define VAX_FUNCTION_PROFILER_NAME "__mcount"
  41
  42 /*  Let's be re-entrant.  */
  43 #undef PCC_STATIC_STRUCT_RETURN
  44
  45 /* Before the prologue, the top of the frame is below the argument
  46    count pushed by the CALLS and before the start of the saved registers.  */
  47 #define INCOMING_FRAME_SP_OFFSET 0
  48
  49 /* We use R2-R5 (call-clobbered) registers for exceptions.  */
  50 #define EH_RETURN_DATA_REGNO(N) ((N) < 4 ? (N) + 2 : INVALID_REGNUM)
  51
  52 /* Place the top of the stack for the DWARF2 EH stackadj value.  */
  53 #define EH_RETURN_STACKADJ_RTX                                          \
  54   gen_rtx_MEM (SImode,                                                  \
  55                plus_constant (gen_rtx_REG (Pmode, FRAME_POINTER_REGNUM),\
  56                               -4))
  57
  58 /* Simple store the return handler into the call frame.  */
  59 #define EH_RETURN_HANDLER_RTX                                           \
  60   gen_rtx_MEM (Pmode,                                                   \
  61                plus_constant (gen_rtx_REG (Pmode, FRAME_POINTER_REGNUM),\
  62                               16))
  63
  64
  65 /* Reserve the top of the stack for exception handler stackadj value.  */
  66 #undef STARTING_FRAME_OFFSET
  67 #define STARTING_FRAME_OFFSET -4
  68
  69 /* The VAX wants no space between the case instruction and the jump table.  */
  70 #undef  ASM_OUTPUT_BEFORE_CASE_LABEL
  71 #define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE, PREFIX, NUM, TABLE)
  72
  73 #undef OVERRIDE_OPTIONS
  74 #define OVERRIDE_OPTIONS                                \
  75   do                                                    \
  76     {                                                   \
  77       /* Do generic VAX overrides.  */                  \
  78       override_options ();                              \
  79                                                         \
  80       /* Turn off function CSE if we're doing PIC.  */  \
  81       if (flag_pic)                                     \
  82         flag_no_function_cse = 1;                       \
  83     }                                                   \
  84   while (0)
  85
  86 /* Don't allow *foo which foo is non-local */
  87 #define NO_EXTERNAL_INDIRECT_ADDRESS
  88
  89 #undef VAX_CC1_AND_CC1PLUS_SPEC
  90 #define VAX_CC1_AND_CC1PLUS_SPEC \
  91   "%{!fno-pic: \
  92      %{!fpic: \
  93        %{!fPIC:-fPIC}}}"
  94
  95 /* VAX ELF is always gas; override the generic VAX ASM_SPEC.  */
  96
  97 #undef ASM_SPEC
  98 #define ASM_SPEC "%{!fno-pic: %{!mno-asm-pic:-k}}"
  99
 100 /*  We want PCREL dwarf output.  */
 101 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)       \
 102   ((GLOBAL ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel | DW_EH_PE_sdata4)
 103
 104 /* Emit a PC-relative relocation.  */
 105 #define ASM_OUTPUT_DWARF_PCREL(FILE, SIZE, LABEL)       \
 106   do {                                                  \
 107     fputs (integer_asm_op (SIZE, FALSE), FILE);         \
 108     fprintf (FILE, "%%pcrel%d(", SIZE * 8);             \
 109     assemble_name (FILE, LABEL);                        \
 110     fputc (')', FILE);                                  \
 111   } while (0)