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1 /* Target definitions for GNU compiler for VAX using ELF
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2 Copyright (C) 2002, 2004, 2005, 2007, 2008 Free Software Foundation, Inc.
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3 Contributed by Matt Thomas <matt@3am-software.com>
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4
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5 This file is part of GCC.
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6
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7 GCC is free software; you can redistribute it and/or modify
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8 it under the terms of the GNU General Public License as published by
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9 the Free Software Foundation; either version 3, or (at your option)
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10 any later version.
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11
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12 GCC is distributed in the hope that it will be useful,
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13 but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with GCC; see the file COPYING3. If not see
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19 <http://www.gnu.org/licenses/>. */
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20
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21 #undef TARGET_ELF
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22 #define TARGET_ELF 1
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23
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24 #undef REGISTER_PREFIX
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25 #undef REGISTER_NAMES
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26 #define REGISTER_PREFIX "%"
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27 #define REGISTER_NAMES \
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28 { "%r0", "%r1", "%r2", "%r3", "%r4", "%r5", "%r6", "%r7", \
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29 "%r8", "%r9", "%r10", "%r11", "%ap", "%fp", "%sp", "%pc", }
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30
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31 #undef SIZE_TYPE
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32 #define SIZE_TYPE "long unsigned int"
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33
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34 #undef PTRDIFF_TYPE
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35 #define PTRDIFF_TYPE "long int"
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36
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37 /* Profiling routine. */
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38 #undef VAX_FUNCTION_PROFILER_NAME
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39 #define VAX_FUNCTION_PROFILER_NAME "__mcount"
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40
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41 /* Let's be re-entrant. */
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42 #undef PCC_STATIC_STRUCT_RETURN
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43
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44 /* Before the prologue, the top of the frame is below the argument
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45 count pushed by the CALLS and before the start of the saved registers. */
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46 #define INCOMING_FRAME_SP_OFFSET 0
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47
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48 /* Offset from the frame pointer register value to the top of the stack. */
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49 #define FRAME_POINTER_CFA_OFFSET(FNDECL) 0
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50
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51 /* We use R2-R5 (call-clobbered) registers for exceptions. */
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52 #define EH_RETURN_DATA_REGNO(N) ((N) < 4 ? (N) + 2 : INVALID_REGNUM)
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53
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54 /* Place the top of the stack for the DWARF2 EH stackadj value. */
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55 #define EH_RETURN_STACKADJ_RTX \
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56 gen_rtx_MEM (SImode, \
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57 plus_constant (gen_rtx_REG (Pmode, FRAME_POINTER_REGNUM),\
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58 -4))
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59
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60 /* Simple store the return handler into the call frame. */
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61 #define EH_RETURN_HANDLER_RTX \
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62 gen_rtx_MEM (Pmode, \
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63 plus_constant (gen_rtx_REG (Pmode, FRAME_POINTER_REGNUM),\
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64 16))
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65
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66
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67 /* Reserve the top of the stack for exception handler stackadj value. */
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68 #undef STARTING_FRAME_OFFSET
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69 #define STARTING_FRAME_OFFSET -4
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70
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71 /* The VAX wants no space between the case instruction and the jump table. */
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72 #undef ASM_OUTPUT_BEFORE_CASE_LABEL
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73 #define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE, PREFIX, NUM, TABLE)
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74
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75 #undef OVERRIDE_OPTIONS
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76 #define OVERRIDE_OPTIONS \
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77 do \
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78 { \
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79 /* Do generic VAX overrides. */ \
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80 override_options (); \
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81 \
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82 /* Turn off function CSE if we're doing PIC. */ \
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83 if (flag_pic) \
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84 flag_no_function_cse = 1; \
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85 } \
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86 while (0)
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87
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88 /* VAX ELF is always gas; override the generic VAX ASM_SPEC. */
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89
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90 #undef ASM_SPEC
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91 #define ASM_SPEC ""
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92
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