gcc/config/vax/elf.h

   1 /* Target definitions for GNU compiler for VAX using ELF
   2    Copyright (C) 2002, 2004, 2005, 2007, 2008, 2009, 2010, 2012
   3    Free Software Foundation, Inc.
   4    Contributed by Matt Thomas <matt@3am-software.com>
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 3, or (at your option)
  11 any later version.
  12
  13 GCC is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING3.  If not see
  20 <http://www.gnu.org/licenses/>.  */
  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 /* Offset from the frame pointer register value to the top of the stack.  */
  50 #define FRAME_POINTER_CFA_OFFSET(FNDECL) 0
  51
  52 /* We use R2-R5 (call-clobbered) registers for exceptions.  */
  53 #define EH_RETURN_DATA_REGNO(N) ((N) < 4 ? (N) + 2 : INVALID_REGNUM)
  54
  55 /* Place the top of the stack for the DWARF2 EH stackadj value.  */
  56 #define EH_RETURN_STACKADJ_RTX                                          \
  57   gen_rtx_MEM (SImode,                                                  \
  58                plus_constant (Pmode,                                    \
  59                               gen_rtx_REG (Pmode, FRAME_POINTER_REGNUM),\
  60                               -4))
  61
  62 /* Simple store the return handler into the call frame.  */
  63 #define EH_RETURN_HANDLER_RTX                                           \
  64   gen_rtx_MEM (Pmode,                                                   \
  65                plus_constant (Pmode,                                    \
  66                               gen_rtx_REG (Pmode, FRAME_POINTER_REGNUM),\
  67                               16))
  68
  69
  70 /* Reserve the top of the stack for exception handler stackadj value.  */
  71 #undef STARTING_FRAME_OFFSET
  72 #define STARTING_FRAME_OFFSET -4
  73
  74 /* The VAX wants no space between the case instruction and the jump table.  */
  75 #undef  ASM_OUTPUT_BEFORE_CASE_LABEL
  76 #define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE, PREFIX, NUM, TABLE)
  77
  78 #undef SUBTARGET_OVERRIDE_OPTIONS
  79 #define SUBTARGET_OVERRIDE_OPTIONS                      \
  80   do                                                    \
  81     {                                                   \
  82       /* Turn off function CSE if we're doing PIC.  */  \
  83       if (flag_pic)                                     \
  84         flag_no_function_cse = 1;                       \
  85     }                                                   \
  86   while (0)
  87
  88 /* Don't allow *foo which foo is non-local */
  89 #define NO_EXTERNAL_INDIRECT_ADDRESS
  90
  91 #undef VAX_CC1_AND_CC1PLUS_SPEC
  92 #define VAX_CC1_AND_CC1PLUS_SPEC \
  93   "%{!fno-pic: \
  94      %{!fpic: \
  95        %{!fPIC:-fPIC}}}"
  96
  97 /* VAX ELF is always gas; override the generic VAX ASM_SPEC.  */
  98
  99 #undef ASM_SPEC
 100 #define ASM_SPEC "%{!fno-pic: %{!mno-asm-pic:-k}}"
 101
 102 /*  We want PCREL dwarf output.  */
 103 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)       \
 104   ((GLOBAL ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel | DW_EH_PE_sdata4)
 105
 106 /* Emit a PC-relative relocation.  */
 107 #define ASM_OUTPUT_DWARF_PCREL(FILE, SIZE, LABEL)       \
 108   do {                                                  \
 109     fputs (integer_asm_op (SIZE, FALSE), FILE);         \
 110     fprintf (FILE, "%%pcrel%d(", SIZE * 8);             \
 111     assemble_name (FILE, LABEL);                        \
 112     fputc (')', FILE);                                  \
 113   } while (0)