1 /* write.h 2 Copyright 1987, 1992, 1993, 1994, 1995, 1996, 1997, 1999, 2000, 2001, 3 2002, 2003 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 2, 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 #ifndef __write_h__ 23 #define __write_h__ 24 25 #ifndef TC_I960 26 #ifdef hpux 27 #define EXEC_MACHINE_TYPE HP9000S200_ID 28 #endif 29 #endif /* TC_I960 */ 30 31 #ifndef BFD_ASSEMBLER 32 33 #ifndef LOCAL_LABEL 34 #define LOCAL_LABEL(name) (name [0] == 'L' ) 35 #endif 36 37 #define S_LOCAL_NAME(s) (LOCAL_LABEL (S_GET_NAME (s))) 38 39 #endif /* ! BFD_ASSEMBLER */ 40 41 /* This is the name of a fake symbol which will never appear in the 42 assembler output. S_IS_LOCAL detects it because of the \001. */ 43 #ifndef FAKE_LABEL_NAME 44 #define FAKE_LABEL_NAME "L0\001" 45 #endif 46 47 #include "bit_fix.h" 48 49 /* 50 * FixSs may be built up in any order. 51 */ 52 53 struct fix 54 { 55 /* These small fields are grouped together for compactness of 56 this structure, and efficiency of access on some architectures. */ 57 58 /* pc-relative offset adjust (only used by m68k) */ 59 char fx_pcrel_adjust; 60 61 /* How many bytes are involved? */ 62 unsigned char fx_size; 63 64 /* Is this a pc-relative relocation? */ 65 unsigned fx_pcrel : 1; 66 67 /* Is this a relocation to a procedure linkage table entry? If so, 68 some of the reductions we try to apply are invalid. A better way 69 might be to represent PLT entries with different kinds of 70 symbols, and use normal relocations (with undefined symbols); 71 look into it for version 2.6. */ 72 unsigned fx_plt : 1; 73 74 /* (TIGCC 20040920) Is this an unoptimizable reloc? -- Kevin Kofler */ 75 unsigned fx_unoptimizable : 1; 76 77 /* Is this value an immediate displacement? */ 78 /* Only used on i960 and ns32k; merge it into TC_FIX_TYPE sometime. */ 79 unsigned fx_im_disp : 1; 80 81 /* A bit for the CPU specific code. 82 This probably can be folded into tc_fix_data, below. */ 83 unsigned fx_tcbit : 1; 84 85 /* Has this relocation already been applied? */ 86 unsigned fx_done : 1; 87 88 /* Suppress overflow complaints on large addends. This is used 89 in the PowerPC ELF config to allow large addends on the 90 BFD_RELOC_{LO16,HI16,HI16_S} relocations. 91 92 @@ Can this be determined from BFD? */ 93 unsigned fx_no_overflow : 1; 94 95 /* The value is signed when checking for overflow. */ 96 unsigned fx_signed : 1; 97 98 /* Which frag does this fix apply to? */ 99 fragS *fx_frag; 100 101 /* Where is the first byte to fix up? */ 102 long fx_where; 103 104 /* NULL or Symbol whose value we add in. */ 105 symbolS *fx_addsy; 106 107 /* NULL or Symbol whose value we subtract. */ 108 symbolS *fx_subsy; 109 110 /* Absolute number we add in. */ 111 valueT fx_offset; 112 113 /* The value of dot when the fixup expression was parsed. */ 114 addressT fx_dot_value; 115 116 /* Next fixS in linked list, or NULL. */ 117 struct fix *fx_next; 118 119 /* If NULL, no bitfix's to do. */ 120 /* Only i960-coff and ns32k use this, and i960-coff stores an 121 integer. This can probably be folded into tc_fix_data, below. 122 @@ Alpha also uses it, but only to disable certain relocation 123 processing. */ 124 bit_fixS *fx_bit_fixP; 125 126 #ifdef BFD_ASSEMBLER 127 bfd_reloc_code_real_type fx_r_type; 128 #else 129 #ifdef NEED_FX_R_TYPE 130 /* Hack for machines where the type of reloc can't be 131 worked out by looking at how big it is. */ 132 int fx_r_type; 133 #endif 134 #endif 135 136 /* This field is sort of misnamed. It appears to be a sort of random 137 scratch field, for use by the back ends. The main gas code doesn't 138 do anything but initialize it to zero. The use of it does need to 139 be coordinated between the cpu and format files, though. E.g., some 140 coff targets pass the `addend' field from the cpu file via this 141 field. I don't know why the `fx_offset' field above can't be used 142 for that; investigate later and document. KR */ 143 valueT fx_addnumber; 144 145 /* The location of the instruction which created the reloc, used 146 in error messages. */ 147 char *fx_file; 148 unsigned fx_line; 149 150 #ifdef USING_CGEN 151 struct { 152 /* CGEN_INSN entry for this instruction. */ 153 const struct cgen_insn *insn; 154 /* Target specific data, usually reloc number. */ 155 int opinfo; 156 } fx_cgen; 157 #endif 158 159 #ifdef TC_FIX_TYPE 160 /* Location where a backend can attach additional data 161 needed to perform fixups. */ 162 TC_FIX_TYPE tc_fix_data; 163 #endif 164 }; 165 166 typedef struct fix fixS; 167 168 extern int finalize_syms; 169 extern symbolS *abs_section_sym; 170 extern addressT dot_value; 171 172 #ifndef BFD_ASSEMBLER 173 extern char *next_object_file_charP; 174 175 #ifndef MANY_SEGMENTS 176 COMMON fixS *text_fix_root, *text_fix_tail; /* Chains fixSs. */ 177 COMMON fixS *data_fix_root, *data_fix_tail; /* Chains fixSs. */ 178 COMMON fixS *bss_fix_root, *bss_fix_tail; /* Chains fixSs. */ 179 extern struct frag *text_last_frag; /* Last frag in segment. */ 180 extern struct frag *data_last_frag; /* Last frag in segment. */ 181 #endif 182 COMMON fixS **seg_fix_rootP, **seg_fix_tailP; /* -> one of above. */ 183 #endif 184 185 extern long string_byte_count; 186 extern int section_alignment[]; 187 188 extern bit_fixS *bit_fix_new 189 (int size, int offset, long base_type, long base_adj, long min, 190 long max, long add); 191 extern void append (char **charPP, char *fromP, unsigned long length); 192 extern void record_alignment (segT seg, int align); 193 extern int get_recorded_alignment (segT seg); 194 extern void subsegs_finish (void); 195 extern void write_object_file (void); 196 extern long relax_frag (segT, fragS *, long); 197 extern int relax_segment (struct frag * seg_frag_root, segT seg_type); 198 199 extern void number_to_chars_littleendian (char *, valueT, int); 200 extern void number_to_chars_bigendian (char *, valueT, int); 201 202 #ifdef BFD_ASSEMBLER 203 extern fixS *fix_new 204 (fragS * frag, int where, int size, symbolS * add_symbol, 205 offsetT offset, int pcrel, bfd_reloc_code_real_type r_type); 206 extern fixS *fix_new_exp 207 (fragS * frag, int where, int size, expressionS *exp, int pcrel, 208 bfd_reloc_code_real_type r_type); 209 #else 210 extern fixS *fix_new 211 (fragS * frag, int where, int size, symbolS * add_symbol, 212 offsetT offset, int pcrel, int r_type); 213 extern fixS *fix_new_exp 214 (fragS * frag, int where, int size, expressionS *exp, int pcrel, 215 int r_type); 216 #endif 217 218 extern void write_print_statistics (FILE *); 219 220 #endif /* __write_h__ */ 221