1 /* This file is tc-alpha.h 2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 3 2005 4 Free Software Foundation, Inc. 5 Written by Ken Raeburn <raeburn@cygnus.com>. 6 7 This file is part of GAS, the GNU Assembler. 8 9 GAS is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 2, or (at your option) 12 any later version. 13 14 GAS is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with GAS; see the file COPYING. If not, write to the Free 21 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 22 02110-1301, USA. */ 23 24 #define TC_ALPHA 25 26 #define TARGET_BYTES_BIG_ENDIAN 0 27 28 #define WORKING_DOT_WORD 29 30 #define TARGET_ARCH bfd_arch_alpha 31 32 #ifdef TE_FreeBSD 33 #define ELF_TARGET_FORMAT "elf64-alpha-freebsd" 34 #endif 35 #ifndef ELF_TARGET_FORMAT 36 #define ELF_TARGET_FORMAT "elf64-alpha" 37 #endif 38 39 #define TARGET_FORMAT (OUTPUT_FLAVOR == bfd_target_ecoff_flavour \ 40 ? "ecoff-littlealpha" \ 41 : OUTPUT_FLAVOR == bfd_target_elf_flavour \ 42 ? ELF_TARGET_FORMAT \ 43 : OUTPUT_FLAVOR == bfd_target_evax_flavour \ 44 ? "vms-alpha" \ 45 : "unknown-format") 46 47 #define NEED_LITERAL_POOL 48 #define REPEAT_CONS_EXPRESSIONS 49 50 struct fix; 51 struct alpha_reloc_tag; 52 53 extern int alpha_force_relocation (struct fix *); 54 extern int alpha_fix_adjustable (struct fix *); 55 56 extern unsigned long alpha_gprmask, alpha_fprmask; 57 extern valueT alpha_gp_value; 58 59 #define TC_FORCE_RELOCATION(FIX) alpha_force_relocation (FIX) 60 #define tc_fix_adjustable(FIX) alpha_fix_adjustable (FIX) 61 #define RELOC_REQUIRES_SYMBOL 62 63 /* Values passed to md_apply_fix don't include the symbol value. */ 64 #define MD_APPLY_SYM_VALUE(FIX) 0 65 66 #define md_convert_frag(b,s,f) as_fatal ("alpha convert_frag\n") 67 #define md_estimate_size_before_relax(f,s) \ 68 (as_fatal ("estimate_size_before_relax called"),1) 69 #define md_operand(x) 70 71 #ifdef OBJ_EVAX 72 73 /* This field keeps the symbols position in the link section. */ 74 #define OBJ_SYMFIELD_TYPE valueT 75 76 #define TC_CONS_FIX_NEW(FRAG,OFF,LEN,EXP) \ 77 fix_new_exp (FRAG, OFF, (int)LEN, EXP, 0, \ 78 LEN == 2 ? BFD_RELOC_16 \ 79 : LEN == 4 ? BFD_RELOC_32 \ 80 : LEN == 8 ? BFD_RELOC_64 \ 81 : BFD_RELOC_ALPHA_LINKAGE); 82 #endif 83 84 #ifndef VMS 85 #define TC_IMPLICIT_LCOMM_ALIGNMENT(size, align) \ 86 do \ 87 { \ 88 align = 0; \ 89 if (size > 1) \ 90 { \ 91 addressT temp = 1; \ 92 while ((size & temp) == 0) \ 93 ++align, temp <<= 1; \ 94 } \ 95 } \ 96 while (0) 97 #endif 98 99 #define md_number_to_chars number_to_chars_littleendian 100 101 extern int tc_get_register (int); 102 extern void alpha_frob_ecoff_data (void); 103 104 #define tc_frob_label(sym) alpha_define_label (sym) 105 extern void alpha_define_label (symbolS *); 106 107 #define md_cons_align(nbytes) alpha_cons_align (nbytes) 108 extern void alpha_cons_align (int); 109 110 #define HANDLE_ALIGN(fragp) alpha_handle_align (fragp) 111 extern void alpha_handle_align (struct frag *); 112 113 #define MAX_MEM_FOR_RS_ALIGN_CODE (3 + 4 + 8) 114 115 #ifdef OBJ_ECOFF 116 #define tc_frob_file_before_adjust() alpha_frob_file_before_adjust () 117 extern void alpha_frob_file_before_adjust (void); 118 #endif 119 120 #define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs. */ 121 122 #ifdef OBJ_ELF 123 #define md_elf_section_letter alpha_elf_section_letter 124 extern int alpha_elf_section_letter (int, char **); 125 #define md_elf_section_flags alpha_elf_section_flags 126 extern flagword alpha_elf_section_flags (flagword, int, int); 127 #endif 128 129 /* Whether to add support for explicit !relocation_op!sequence_number. At the 130 moment, only do this for ELF, though ECOFF could use it as well. */ 131 132 #ifdef OBJ_ELF 133 #define RELOC_OP_P 134 #endif 135 136 /* Before the relocations are written, reorder them, so that user 137 supplied !lituse relocations follow the appropriate !literal 138 relocations. Also convert the gas-internal relocations to the 139 appropriate linker relocations. */ 140 #define tc_frob_file_before_fix() alpha_before_fix () 141 extern void alpha_before_fix (void); 142 143 #ifdef OBJ_ELF 144 #define md_end alpha_elf_md_end 145 extern void alpha_elf_md_end (void); 146 #endif 147 148 /* New fields for supporting explicit relocations (such as !literal to mark 149 where a pointer is loaded from the global table, and !lituse_base to track 150 all of the normal uses of that pointer). */ 151 152 #define TC_FIX_TYPE struct alpha_fix_tag 153 154 struct alpha_fix_tag 155 { 156 struct fix *next_reloc; /* Next !lituse or !gpdisp. */ 157 struct alpha_reloc_tag *info; /* Other members with same sequence. */ 158 }; 159 160 /* Initialize the TC_FIX_TYPE field. */ 161 #define TC_INIT_FIX_DATA(FIX) \ 162 do { \ 163 FIX->tc_fix_data.next_reloc = NULL; \ 164 FIX->tc_fix_data.info = NULL; \ 165 } while (0) 166 167 /* Work with DEBUG5 to print fields in tc_fix_type. */ 168 #define TC_FIX_DATA_PRINT(STREAM, FIX) \ 169 do { \ 170 if (FIX->tc_fix_data.info) \ 171 fprintf (STREAM, "\tinfo = 0x%lx, next_reloc = 0x%lx\n", \ 172 (long) FIX->tc_fix_data.info, \ 173 (long) FIX->tc_fix_data.next_reloc); \ 174 } while (0) 175 176 #define TARGET_USE_CFIPOP 1 177 178 #define tc_cfi_frame_initial_instructions alpha_cfi_frame_initial_instructions 179 extern void alpha_cfi_frame_initial_instructions (void); 180 181 #define DWARF2_LINE_MIN_INSN_LENGTH 4 182 #define DWARF2_DEFAULT_RETURN_COLUMN 26 183 #define DWARF2_CIE_DATA_ALIGNMENT -8 184