1 /* tc-hppa.h -- Header file for the PA 2 Copyright 1989, 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2001 3 Free Software Foundation, Inc. 4 5 This file is part of GAS, the GNU Assembler. 6 7 GAS 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 1, or (at your option) 10 any later version. 11 12 GAS 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 GAS; see the file COPYING. If not, write to the Free 19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 20 02111-1307, USA. */ 21 22 /* HP PA-RISC support was contributed by the Center for Software Science 23 at the University of Utah. */ 24 25 /* Please refrain from exposing the world to the internals of tc-hppa.c 26 when this file is included. This means only declaring exported functions, 27 (please PARAMize them!) not exporting structures and data items which 28 are used solely within tc-hppa.c, etc. 29 30 Also refrain from adding any more object file dependent code, there is 31 already far too much object file format dependent code in this file. 32 In theory this file should contain only exported functions, structures 33 and data declarations common to all PA assemblers. */ 34 35 #ifndef _TC_HPPA_H 36 #define _TC_HPPA_H 37 38 #ifndef TC_HPPA 39 #define TC_HPPA 1 40 #endif 41 42 #define TARGET_BYTES_BIG_ENDIAN 1 43 44 #define TARGET_ARCH bfd_arch_hppa 45 46 #define WORKING_DOT_WORD 47 48 #ifdef OBJ_ELF 49 #if TARGET_ARCH_SIZE == 64 50 #include "bfd/elf64-hppa.h" 51 #ifdef TE_LINUX 52 #define TARGET_FORMAT "elf64-hppa-linux" 53 #else 54 #define TARGET_FORMAT "elf64-hppa" 55 #endif 56 #else /* TARGET_ARCH_SIZE == 32 */ 57 #include "bfd/elf32-hppa.h" 58 #ifdef TE_LINUX 59 #define TARGET_FORMAT "elf32-hppa-linux" 60 #else 61 #define TARGET_FORMAT "elf32-hppa" 62 #endif 63 #endif 64 #endif 65 66 #ifdef OBJ_SOM 67 #include "bfd/som.h" 68 #define TARGET_FORMAT "som" 69 #endif 70 71 #ifdef TE_LINUX 72 /* Define to compile in an extra assembler option, -c, which enables a 73 warning (once per file) when a comment is encountered. 74 The hppa comment char is a `;' which tends to occur in random C asm 75 statements. A semicolon is a line separator for most assemblers. 76 It's hard to find these lurking semicolons. Thus... */ 77 #define WARN_COMMENTS 1 78 #endif 79 80 /* FIXME. Why oh why aren't these defined somewhere globally? */ 81 #ifndef FALSE 82 #define FALSE (0) 83 #define TRUE (!FALSE) 84 #endif 85 86 #define ASEC_NULL (asection *)0 87 88 /* pa_define_label gets used outside of tc-hppa.c via tc_frob_label. */ 89 extern void pa_define_label PARAMS ((symbolS *)); 90 91 extern void parse_cons_expression_hppa PARAMS ((expressionS *)); 92 extern void cons_fix_new_hppa PARAMS ((fragS *, int, int, expressionS *)); 93 extern int hppa_force_relocation PARAMS ((struct fix *)); 94 95 /* This gets called before writing the object file to make sure 96 things like entry/exit and proc/procend pairs match. */ 97 extern void pa_check_eof PARAMS ((void)); 98 #define tc_frob_file pa_check_eof 99 100 #define tc_frob_label(sym) pa_define_label (sym) 101 102 /* The PA does not need support for either of these. */ 103 #define tc_crawl_symbol_chain(headers) {;} 104 #define tc_headers_hook(headers) {;} 105 106 #define RELOC_EXPANSION_POSSIBLE 107 #define MAX_RELOC_EXPANSION 6 108 109 /* The PA needs to parse field selectors in .byte, etc. */ 110 111 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \ 112 parse_cons_expression_hppa (EXP) 113 #define TC_CONS_FIX_NEW cons_fix_new_hppa 114 115 /* On the PA, an equal sign often appears as a condition or nullification 116 completer in an instruction. This can be detected by checking the 117 previous character, if the character is a comma, then the equal is 118 being used as part of an instruction. */ 119 #define TC_EQUAL_IN_INSN(C, PTR) ((C) == ',') 120 121 /* Similarly for an exclamation point. It is used in FP comparison 122 instructions and as an end of line marker. When used in an instruction 123 it will always follow a comma. */ 124 #define TC_EOL_IN_INSN(PTR) (*(PTR) == '!' && (PTR)[-1] == ',') 125 126 int hppa_fix_adjustable PARAMS((struct fix *)); 127 #define tc_fix_adjustable hppa_fix_adjustable 128 129 /* Because of the strange PA calling conventions, it is sometimes 130 necessary to emit a relocation for a call even though it would 131 normally appear safe to handle it completely within GAS. */ 132 #define TC_FORCE_RELOCATION(FIXP) hppa_force_relocation (FIXP) 133 134 #ifdef OBJ_SOM 135 /* If a symbol is imported, but never used, then the symbol should 136 *not* end up in the symbol table. Likewise for absolute symbols 137 with local scope. */ 138 #define tc_frob_symbol(sym,punt) \ 139 if ((S_GET_SEGMENT (sym) == &bfd_und_section && ! symbol_used_p (sym)) \ 140 || (S_GET_SEGMENT (sym) == &bfd_abs_section \ 141 && ! S_IS_EXTERNAL (sym))) \ 142 punt = 1 143 144 /* We need to be able to make relocations involving the difference of 145 two symbols. This includes the difference of two symbols when 146 one of them is undefined (this comes up in PIC code generation). 147 148 We don't define DIFF_EXPR_OK because it does the wrong thing if 149 the add symbol is undefined and the sub symbol is a symbol in 150 the same section as the relocation. We also need some way to 151 specialize some code in adjust_reloc_syms. */ 152 #define UNDEFINED_DIFFERENCE_OK 153 #endif 154 155 #ifdef OBJ_ELF 156 /* It's OK to subtract two symbols in the same section without 157 emitting a relocation. */ 158 #define TC_FORCE_RELOCATION_SECTION(FIXP, SEC) 0 159 160 /* Handle .type psuedo. Given a type string of `millicode', set the 161 internal elf symbol type to STT_PARISC_MILLI, and return 162 BSF_FUNCTION for the BFD symbol type. */ 163 #define md_elf_symbol_type(name, sym, elf) \ 164 ((strcmp ((name), "millicode") == 0 \ 165 || strcmp ((name), "STT_PARISC_MILLI") == 0) \ 166 ? (((elf)->internal_elf_sym.st_info = ELF_ST_INFO \ 167 (ELF_ST_BIND ((elf)->internal_elf_sym.st_info), STT_PARISC_MILLI)\ 168 ), BSF_FUNCTION) \ 169 : -1) 170 171 #define tc_frob_symbol(sym,punt) \ 172 { \ 173 if ((S_GET_SEGMENT (sym) == &bfd_und_section && ! symbol_used_p (sym)) \ 174 || (S_GET_SEGMENT (sym) == &bfd_abs_section \ 175 && ! S_IS_EXTERNAL (sym)) \ 176 || strcmp (S_GET_NAME (sym), "$global$") == 0 \ 177 || strcmp (S_GET_NAME (sym), "$PIC_pcrel$0") == 0) \ 178 punt = 1; \ 179 } 180 181 #define elf_tc_final_processing elf_hppa_final_processing 182 void elf_hppa_final_processing PARAMS ((void)); 183 184 #define DWARF2_LINE_MIN_INSN_LENGTH 4 185 #endif /* OBJ_ELF */ 186 187 #define md_operand(x) 188 189 /* Allow register expressions to be treated as absolute expressions. 190 A silly fudge required for backwards compatibility. */ 191 #define md_optimize_expr hppa_force_reg_syms_absolute 192 193 int hppa_force_reg_syms_absolute 194 PARAMS ((expressionS *, operatorT, expressionS *)); 195 196 #define TC_FIX_TYPE PTR 197 #define TC_INIT_FIX_DATA(FIXP) ((FIXP)->tc_fix_data = NULL) 198 199 #endif /* _TC_HPPA_H */ 200