gcc/config/vax/elf.h

   1 /* Target definitions for GNU compiler for VAX using ELF
   2    Copyright (C) 2002-2017 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 3, 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 COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #undef TARGET_ELF
  22 #define TARGET_ELF 1
  23
  24 #undef REGISTER_PREFIX
  25 #undef REGISTER_NAMES
  26 #define REGISTER_PREFIX "%"
  27 #define REGISTER_NAMES \
  28   { "%r0", "%r1",  "%r2",  "%r3", "%r4", "%r5", "%r6", "%r7", \
  29     "%r8", "%r9", "%r10", "%r11", "%ap", "%fp", "%sp", "%pc", }
  30
  31 #undef SIZE_TYPE
  32 #define SIZE_TYPE "long unsigned int"
  33
  34 #undef PTRDIFF_TYPE
  35 #define PTRDIFF_TYPE "long int"
  36
  37 /* Profiling routine.  */
  38 #undef VAX_FUNCTION_PROFILER_NAME
  39 #define VAX_FUNCTION_PROFILER_NAME "__mcount"
  40
  41 /*  Let's be re-entrant.  */
  42 #undef PCC_STATIC_STRUCT_RETURN
  43
  44 /* Before the prologue, the top of the frame is below the argument
  45    count pushed by the CALLS and before the start of the saved registers.  */
  46 #define INCOMING_FRAME_SP_OFFSET 0
  47
  48 /* Offset from the frame pointer register value to the top of the stack.  */
  49 #define FRAME_POINTER_CFA_OFFSET(FNDECL) 0
  50
  51 /* We use R2-R5 (call-clobbered) registers for exceptions.  */
  52 #define EH_RETURN_DATA_REGNO(N) ((N) < 4 ? (N) + 2 : INVALID_REGNUM)
  53
  54 /* Place the top of the stack for the DWARF2 EH stackadj value.  */
  55 #define EH_RETURN_STACKADJ_RTX                                          \
  56   gen_rtx_MEM (SImode,                                                  \
  57                plus_constant (Pmode,                                    \
  58                               gen_rtx_REG (Pmode, FRAME_POINTER_REGNUM),\
  59                               -4))
  60
  61 /* Simple store the return handler into the call frame.  */
  62 #define EH_RETURN_HANDLER_RTX                                           \
  63   gen_rtx_MEM (Pmode,                                                   \
  64                plus_constant (Pmode,                                    \
  65                               gen_rtx_REG (Pmode, FRAME_POINTER_REGNUM),\
  66                               16))
  67
  68
  69 /* Reserve the top of the stack for exception handler stackadj value.  */
  70 #undef STARTING_FRAME_OFFSET
  71 #define STARTING_FRAME_OFFSET -4
  72
  73 /* The VAX wants no space between the case instruction and the jump table.  */
  74 #undef  ASM_OUTPUT_BEFORE_CASE_LABEL
  75 #define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE, PREFIX, NUM, TABLE)
  76
  77 #undef SUBTARGET_OVERRIDE_OPTIONS
  78 #define SUBTARGET_OVERRIDE_OPTIONS                      \
  79   do                                                    \
  80     {                                                   \
  81       /* Turn off function CSE if we're doing PIC.  */  \
  82       if (flag_pic)                                     \
  83         flag_no_function_cse = 1;                       \
  84     }                                                   \
  85   while (0)
  86
  87 /* Don't allow *foo which foo is non-local */
  88 #define NO_EXTERNAL_INDIRECT_ADDRESS
  89
  90 #undef VAX_CC1_AND_CC1PLUS_SPEC
  91 #define VAX_CC1_AND_CC1PLUS_SPEC \
  92   "%{!fno-pic: \
  93      %{!fpic: \
  94        %{!fPIC:-fPIC}}}"
  95
  96 /* VAX ELF is always gas; override the generic VAX ASM_SPEC.  */
  97
  98 #undef ASM_SPEC
  99 #define ASM_SPEC "%{!fno-pic: %{!mno-asm-pic:-k}}"
 100
 101 /*  We want PCREL dwarf output.  */
 102 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)       \
 103   ((GLOBAL ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel | DW_EH_PE_sdata4)
 104
 105 /* Emit a PC-relative relocation.  */
 106 #define ASM_OUTPUT_DWARF_PCREL(FILE, SIZE, LABEL)       \
 107   do {                                                  \
 108     fputs (integer_asm_op (SIZE, FALSE), FILE);         \
 109     fprintf (FILE, "%%pcrel%d(", SIZE * 8);             \
 110     assemble_name (FILE, LABEL);                        \
 111     fputc (')', FILE);                                  \
 112   } while (0)