write.h revision 77298
1/* write.h 2 Copyright (C) 1987, 92, 93, 94, 95, 96, 97, 2000 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 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#define FAKE_LABEL_NAME "L0\001" 44 45#include "bit_fix.h" 46 47/* 48 * FixSs may be built up in any order. 49 */ 50 51struct fix 52{ 53 /* These small fields are grouped together for compactness of 54 this structure, and efficiency of access on some architectures. */ 55 56 /* pc-relative offset adjust (only used by m68k) */ 57 char fx_pcrel_adjust; 58 59 /* How many bytes are involved? */ 60 unsigned char fx_size; 61 62 /* Is this a pc-relative relocation? */ 63 unsigned fx_pcrel : 1; 64 65 /* Is this a relocation to a procedure linkage table entry? If so, 66 some of the reductions we try to apply are invalid. A better way 67 might be to represent PLT entries with different kinds of 68 symbols, and use normal relocations (with undefined symbols); 69 look into it for version 2.6. */ 70 unsigned fx_plt : 1; 71 72 /* Is this value an immediate displacement? */ 73 /* Only used on i960 and ns32k; merge it into TC_FIX_TYPE sometime. */ 74 unsigned fx_im_disp : 2; 75 76 /* A bit for the CPU specific code. 77 This probably can be folded into tc_fix_data, below. */ 78 unsigned fx_tcbit : 1; 79 80 /* Has this relocation already been applied? */ 81 unsigned fx_done : 1; 82 83 /* Suppress overflow complaints on large addends. This is used 84 in the PowerPC ELF config to allow large addends on the 85 BFD_RELOC_{LO16,HI16,HI16_S} relocations. 86 87 @@ Can this be determined from BFD? */ 88 unsigned fx_no_overflow : 1; 89 90 /* The value is signed when checking for overflow. */ 91 unsigned fx_signed : 1; 92 93 /* Which frag does this fix apply to? */ 94 fragS *fx_frag; 95 96 /* Where is the first byte to fix up? */ 97 long fx_where; 98 99 /* NULL or Symbol whose value we add in. */ 100 symbolS *fx_addsy; 101 102 /* NULL or Symbol whose value we subtract. */ 103 symbolS *fx_subsy; 104 105 /* Absolute number we add in. */ 106 valueT fx_offset; 107 108 /* Next fixS in linked list, or NULL. */ 109 struct fix *fx_next; 110 111 /* If NULL, no bitfix's to do. */ 112 /* Only i960-coff and ns32k use this, and i960-coff stores an 113 integer. This can probably be folded into tc_fix_data, below. 114 @@ Alpha also uses it, but only to disable certain relocation 115 processing. */ 116 bit_fixS *fx_bit_fixP; 117 118#ifdef BFD_ASSEMBLER 119 bfd_reloc_code_real_type fx_r_type; 120#else 121#ifdef NEED_FX_R_TYPE 122 /* Hack for machines where the type of reloc can't be 123 worked out by looking at how big it is. */ 124 int fx_r_type; 125#endif 126#endif 127 128 /* This field is sort of misnamed. It appears to be a sort of random 129 scratch field, for use by the back ends. The main gas code doesn't 130 do anything but initialize it to zero. The use of it does need to 131 be coordinated between the cpu and format files, though. E.g., some 132 coff targets pass the `addend' field from the cpu file via this 133 field. I don't know why the `fx_offset' field above can't be used 134 for that; investigate later and document. KR */ 135 valueT fx_addnumber; 136 137 /* The location of the instruction which created the reloc, used 138 in error messages. */ 139 char *fx_file; 140 unsigned fx_line; 141 142#ifdef USING_CGEN 143 struct { 144 /* CGEN_INSN entry for this instruction. */ 145 const struct cgen_insn *insn; 146 /* Target specific data, usually reloc number. */ 147 int opinfo; 148 } fx_cgen; 149#endif 150 151#ifdef TC_FIX_TYPE 152 /* Location where a backend can attach additional data 153 needed to perform fixups. */ 154 TC_FIX_TYPE tc_fix_data; 155#endif 156}; 157 158typedef struct fix fixS; 159 160#ifndef BFD_ASSEMBLER 161extern char *next_object_file_charP; 162 163#ifndef MANY_SEGMENTS 164COMMON fixS *text_fix_root, *text_fix_tail; /* Chains fixSs. */ 165COMMON fixS *data_fix_root, *data_fix_tail; /* Chains fixSs. */ 166COMMON fixS *bss_fix_root, *bss_fix_tail; /* Chains fixSs. */ 167extern struct frag *text_last_frag; /* Last frag in segment. */ 168extern struct frag *data_last_frag; /* Last frag in segment. */ 169#endif 170COMMON fixS **seg_fix_rootP, **seg_fix_tailP; /* -> one of above. */ 171#endif 172 173extern long string_byte_count; 174extern int section_alignment[]; 175 176extern bit_fixS *bit_fix_new 177 PARAMS ((int size, int offset, long base_type, long base_adj, long min, 178 long max, long add)); 179extern void append PARAMS ((char **charPP, char *fromP, unsigned long length)); 180extern void record_alignment PARAMS ((segT seg, int align)); 181extern int get_recorded_alignment PARAMS ((segT seg)); 182extern void subsegs_finish PARAMS ((void)); 183extern void write_object_file PARAMS ((void)); 184extern long relax_frag PARAMS ((fragS *, long)); 185extern void relax_segment 186 PARAMS ((struct frag * seg_frag_root, segT seg_type)); 187 188extern void number_to_chars_littleendian PARAMS ((char *, valueT, int)); 189extern void number_to_chars_bigendian PARAMS ((char *, valueT, int)); 190 191#ifdef BFD_ASSEMBLER 192extern fixS *fix_new 193 PARAMS ((fragS * frag, int where, int size, symbolS * add_symbol, 194 offsetT offset, int pcrel, bfd_reloc_code_real_type r_type)); 195extern fixS *fix_new_exp 196 PARAMS ((fragS * frag, int where, int size, expressionS *exp, int pcrel, 197 bfd_reloc_code_real_type r_type)); 198#else 199extern fixS *fix_new 200 PARAMS ((fragS * frag, int where, int size, symbolS * add_symbol, 201 offsetT offset, int pcrel, int r_type)); 202extern fixS *fix_new_exp 203 PARAMS ((fragS * frag, int where, int size, expressionS *exp, int pcrel, 204 int r_type)); 205#endif 206 207extern void write_print_statistics PARAMS ((FILE *)); 208 209#endif /* __write_h__ */ 210