| 1 | /* This file is tc-alpha.h |
| 2 | Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000 |
| 3 | Free Software Foundation, Inc. |
| 4 | Written by Ken Raeburn <raeburn@cygnus.com>. |
| 5 | |
| 6 | This file is part of GAS, the GNU Assembler. |
| 7 | |
| 8 | GAS 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 2, or (at your option) |
| 11 | any later version. |
| 12 | |
| 13 | GAS 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 GAS; see the file COPYING. If not, write to the Free |
| 20 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
| 21 | 02111-1307, USA. */ |
| 22 | |
| 23 | #define TC_ALPHA |
| 24 | |
| 25 | #define TARGET_BYTES_BIG_ENDIAN 0 |
| 26 | |
| 27 | #define WORKING_DOT_WORD |
| 28 | |
| 29 | #define TARGET_ARCH bfd_arch_alpha |
| 30 | |
| 31 | #define TARGET_FORMAT (OUTPUT_FLAVOR == bfd_target_ecoff_flavour \ |
| 32 | ? "ecoff-littlealpha" \ |
| 33 | : OUTPUT_FLAVOR == bfd_target_elf_flavour \ |
| 34 | ? "elf64-alpha" \ |
| 35 | : OUTPUT_FLAVOR == bfd_target_evax_flavour \ |
| 36 | ? "vms-alpha" \ |
| 37 | : "unknown-format") |
| 38 | |
| 39 | #define NEED_LITERAL_POOL |
| 40 | #define TC_HANDLES_FX_DONE |
| 41 | #define REPEAT_CONS_EXPRESSIONS |
| 42 | |
| 43 | extern int alpha_force_relocation PARAMS ((struct fix *)); |
| 44 | extern int alpha_fix_adjustable PARAMS ((struct fix *)); |
| 45 | |
| 46 | extern unsigned long alpha_gprmask, alpha_fprmask; |
| 47 | extern valueT alpha_gp_value; |
| 48 | |
| 49 | #define TC_FORCE_RELOCATION(FIXP) alpha_force_relocation (FIXP) |
| 50 | #define tc_fix_adjustable(FIXP) alpha_fix_adjustable (FIXP) |
| 51 | #define RELOC_REQUIRES_SYMBOL |
| 52 | |
| 53 | /* This expression evaluates to false if the relocation is for a local |
| 54 | object for which we still want to do the relocation at runtime. |
| 55 | True if we are willing to perform this relocation while building |
| 56 | the .o file. This is only used for pcrel relocations. */ |
| 57 | |
| 58 | #define TC_RELOC_RTSYM_LOC_FIXUP(FIX) \ |
| 59 | ((FIX)->fx_addsy == NULL \ |
| 60 | || (! S_IS_EXTERNAL ((FIX)->fx_addsy) \ |
| 61 | && ! S_IS_WEAK ((FIX)->fx_addsy) \ |
| 62 | && S_IS_DEFINED ((FIX)->fx_addsy) \ |
| 63 | && ! S_IS_COMMON ((FIX)->fx_addsy))) |
| 64 | |
| 65 | #define md_convert_frag(b,s,f) as_fatal ("alpha convert_frag\n") |
| 66 | #define md_estimate_size_before_relax(f,s) \ |
| 67 | (as_fatal ("estimate_size_before_relax called"),1) |
| 68 | #define md_operand(x) |
| 69 | |
| 70 | #ifdef OBJ_EVAX |
| 71 | |
| 72 | /* This field keeps the symbols position in the link section. */ |
| 73 | #define OBJ_SYMFIELD_TYPE valueT |
| 74 | |
| 75 | #define TC_CONS_FIX_NEW(FRAG,OFF,LEN,EXP) \ |
| 76 | fix_new_exp (FRAG, OFF, (int)LEN, EXP, 0, \ |
| 77 | LEN == 2 ? BFD_RELOC_16 \ |
| 78 | : LEN == 4 ? BFD_RELOC_32 \ |
| 79 | : LEN == 8 ? BFD_RELOC_64 \ |
| 80 | : BFD_RELOC_ALPHA_LINKAGE); |
| 81 | #endif |
| 82 | |
| 83 | #define md_number_to_chars number_to_chars_littleendian |
| 84 | |
| 85 | extern int tc_get_register PARAMS ((int frame)); |
| 86 | extern void alpha_frob_ecoff_data PARAMS ((void)); |
| 87 | |
| 88 | #define tc_frob_label(sym) alpha_define_label (sym) |
| 89 | extern void alpha_define_label PARAMS ((symbolS *)); |
| 90 | |
| 91 | #define md_cons_align(nbytes) alpha_cons_align (nbytes) |
| 92 | extern void alpha_cons_align PARAMS ((int)); |
| 93 | |
| 94 | #define HANDLE_ALIGN(fragp) alpha_handle_align (fragp) |
| 95 | extern void alpha_handle_align PARAMS ((struct frag *)); |
| 96 | |
| 97 | #define MAX_MEM_FOR_RS_ALIGN_CODE (3 + 4 + 8) |
| 98 | |
| 99 | #ifdef OBJ_ECOFF |
| 100 | #define tc_frob_file_before_adjust() alpha_frob_file_before_adjust () |
| 101 | extern void alpha_frob_file_before_adjust PARAMS ((void)); |
| 102 | #endif |
| 103 | |
| 104 | #define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */ |
| 105 | |
| 106 | #ifdef OBJ_ELF |
| 107 | #define ELF_TC_SPECIAL_SECTIONS \ |
| 108 | { ".sdata", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL }, \ |
| 109 | { ".sbss", SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL }, |
| 110 | #endif |
| 111 | |
| 112 | /* Whether to add support for explict !relocation_op!sequence_number. At the |
| 113 | moment, only do this for ELF, though ECOFF could use it as well. */ |
| 114 | |
| 115 | #ifdef OBJ_ELF |
| 116 | #define RELOC_OP_P |
| 117 | #endif |
| 118 | |
| 119 | #ifdef RELOC_OP_P |
| 120 | /* Before the relocations are written, reorder them, so that user supplied |
| 121 | !lituse relocations follow the appropriate !literal relocations. Also |
| 122 | convert the gas-internal relocations to the appropriate linker relocations. |
| 123 | */ |
| 124 | #define tc_adjust_symtab() alpha_adjust_symtab () |
| 125 | extern void alpha_adjust_symtab PARAMS ((void)); |
| 126 | |
| 127 | /* New fields for supporting explicit relocations (such as !literal to mark |
| 128 | where a pointer is loaded from the global table, and !lituse_base to track |
| 129 | all of the normal uses of that pointer). */ |
| 130 | |
| 131 | #define TC_FIX_TYPE struct alpha_fix_tag |
| 132 | |
| 133 | struct alpha_fix_tag |
| 134 | { |
| 135 | struct fix *next_lituse; /* next !lituse */ |
| 136 | struct alpha_literal_tag *info; /* other members with same sequence */ |
| 137 | }; |
| 138 | |
| 139 | /* Initialize the TC_FIX_TYPE field. */ |
| 140 | #define TC_INIT_FIX_DATA(fixP) \ |
| 141 | do { \ |
| 142 | fixP->tc_fix_data.next_lituse = (struct fix *)0; \ |
| 143 | fixP->tc_fix_data.info = (struct alpha_literal_tag *)0; \ |
| 144 | } while (0) |
| 145 | |
| 146 | /* Work with DEBUG5 to print fields in tc_fix_type. */ |
| 147 | #define TC_FIX_DATA_PRINT(stream,fixP) \ |
| 148 | do { \ |
| 149 | if (fixP->tc_fix_data.info) \ |
| 150 | fprintf (stderr, "\tinfo = 0x%lx, next_lituse = 0x%lx\n", \ |
| 151 | (long)fixP->tc_fix_data.info, \ |
| 152 | (long)fixP->tc_fix_data.next_lituse); \ |
| 153 | } while (0) |
| 154 | #endif |
| 155 | |
| 156 | #define DWARF2_LINE_MIN_INSN_LENGTH 4 |