tc-alpha.h revision 89857
1/* This file is tc-alpha.h 2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001 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 REPEAT_CONS_EXPRESSIONS 41 42extern int alpha_force_relocation PARAMS ((struct fix *)); 43extern int alpha_fix_adjustable PARAMS ((struct fix *)); 44 45extern unsigned long alpha_gprmask, alpha_fprmask; 46extern valueT alpha_gp_value; 47 48#define TC_FORCE_RELOCATION(FIXP) alpha_force_relocation (FIXP) 49#define tc_fix_adjustable(FIXP) alpha_fix_adjustable (FIXP) 50#define RELOC_REQUIRES_SYMBOL 51 52/* This expression evaluates to false if the relocation is for a local 53 object for which we still want to do the relocation at runtime. 54 True if we are willing to perform this relocation while building 55 the .o file. This is only used for pcrel relocations. */ 56 57#define TC_RELOC_RTSYM_LOC_FIXUP(FIX) \ 58 ((FIX)->fx_addsy == NULL \ 59 || (! S_IS_EXTERNAL ((FIX)->fx_addsy) \ 60 && ! S_IS_WEAK ((FIX)->fx_addsy) \ 61 && S_IS_DEFINED ((FIX)->fx_addsy) \ 62 && ! S_IS_COMMON ((FIX)->fx_addsy))) 63 64#define md_convert_frag(b,s,f) as_fatal ("alpha convert_frag\n") 65#define md_estimate_size_before_relax(f,s) \ 66 (as_fatal ("estimate_size_before_relax called"),1) 67#define md_operand(x) 68 69#ifdef OBJ_EVAX 70 71/* This field keeps the symbols position in the link section. */ 72#define OBJ_SYMFIELD_TYPE valueT 73 74#define TC_CONS_FIX_NEW(FRAG,OFF,LEN,EXP) \ 75 fix_new_exp (FRAG, OFF, (int)LEN, EXP, 0, \ 76 LEN == 2 ? BFD_RELOC_16 \ 77 : LEN == 4 ? BFD_RELOC_32 \ 78 : LEN == 8 ? BFD_RELOC_64 \ 79 : BFD_RELOC_ALPHA_LINKAGE); 80#endif 81 82#define md_number_to_chars number_to_chars_littleendian 83 84extern int tc_get_register PARAMS ((int frame)); 85extern void alpha_frob_ecoff_data PARAMS ((void)); 86 87#define tc_frob_label(sym) alpha_define_label (sym) 88extern void alpha_define_label PARAMS ((symbolS *)); 89 90#define md_cons_align(nbytes) alpha_cons_align (nbytes) 91extern void alpha_cons_align PARAMS ((int)); 92 93#define HANDLE_ALIGN(fragp) alpha_handle_align (fragp) 94extern void alpha_handle_align PARAMS ((struct frag *)); 95 96#define MAX_MEM_FOR_RS_ALIGN_CODE (3 + 4 + 8) 97 98#ifdef OBJ_ECOFF 99#define tc_frob_file_before_adjust() alpha_frob_file_before_adjust () 100extern void alpha_frob_file_before_adjust PARAMS ((void)); 101#endif 102 103#define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */ 104 105#ifdef OBJ_ELF 106#define ELF_TC_SPECIAL_SECTIONS \ 107 { ".sdata", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL }, \ 108 { ".sbss", SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL }, 109 110#define md_elf_section_letter alpha_elf_section_letter 111extern int alpha_elf_section_letter PARAMS ((int, char **)); 112#define md_elf_section_flags alpha_elf_section_flags 113extern flagword alpha_elf_section_flags PARAMS ((flagword, int, int)); 114#endif 115 116/* Whether to add support for explict !relocation_op!sequence_number. At the 117 moment, only do this for ELF, though ECOFF could use it as well. */ 118 119#ifdef OBJ_ELF 120#define RELOC_OP_P 121#endif 122 123/* Before the relocations are written, reorder them, so that user 124 supplied !lituse relocations follow the appropriate !literal 125 relocations. Also convert the gas-internal relocations to the 126 appropriate linker relocations. */ 127#define tc_adjust_symtab() alpha_adjust_symtab () 128extern void alpha_adjust_symtab PARAMS ((void)); 129 130/* New fields for supporting explicit relocations (such as !literal to mark 131 where a pointer is loaded from the global table, and !lituse_base to track 132 all of the normal uses of that pointer). */ 133 134#define TC_FIX_TYPE struct alpha_fix_tag 135 136struct alpha_fix_tag 137{ 138 struct fix *next_reloc; /* next !lituse or !gpdisp */ 139 struct alpha_reloc_tag *info; /* other members with same sequence */ 140}; 141 142/* Initialize the TC_FIX_TYPE field. */ 143#define TC_INIT_FIX_DATA(fixP) \ 144do { \ 145 fixP->tc_fix_data.next_reloc = (struct fix *)0; \ 146 fixP->tc_fix_data.info = (struct alpha_literal_tag *)0; \ 147} while (0) 148 149/* Work with DEBUG5 to print fields in tc_fix_type. */ 150#define TC_FIX_DATA_PRINT(stream,fixP) \ 151do { \ 152 if (fixP->tc_fix_data.info) \ 153 fprintf (stderr, "\tinfo = 0x%lx, next_reloc = 0x%lx\n", \ 154 (long)fixP->tc_fix_data.info, \ 155 (long)fixP->tc_fix_data.next_reloc); \ 156} while (0) 157 158#define DWARF2_LINE_MIN_INSN_LENGTH 4 159