gas/write.h

   1 /* write.h
   2
   3    Copyright (C) 1987, 1992, 1993 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
  19    the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  20
  21 #ifndef TC_I960
  22 #ifdef hpux
  23 #define EXEC_MACHINE_TYPE HP9000S200_ID
  24 #endif
  25 #endif /* TC_I960 */
  26
  27 #ifndef LOCAL_LABEL
  28 #ifdef DOT_LABEL_PREFIX
  29 #define LOCAL_LABEL(name) (name[0] =='.' \
  30                            && ( name [1] == 'L' || name [1] == '.' ))
  31 #else /* not defined DOT_LABEL_PREFIX */
  32 #define LOCAL_LABEL(name) (name [0] == 'L' )
  33 #endif /* not defined DOT_LABEL_PREFIX */
  34 #endif /* LOCAL_LABEL */
  35
  36 #define S_LOCAL_NAME(s) (LOCAL_LABEL(S_GET_NAME(s)))
  37
  38 #include "bit_fix.h"
  39
  40 /*
  41  * FixSs may be built up in any order.
  42  */
  43
  44 struct fix
  45   {
  46     /* These small fields are grouped together for compactness of
  47        this structure, and efficiency of access on some architectures.  */
  48     char fx_pcrel_adjust;       /* pc-relative offset adjust */
  49     unsigned fx_pcrel : 1;      /* TRUE: pc-relative. */
  50     unsigned fx_im_disp : 1;    /* TRUE: value is a displacement */
  51     unsigned fx_bsr : 1;        /* sequent-hack */
  52     /* TRUE if target is a 'callj' (used by i960) */
  53     unsigned fx_callj : 1;
  54     short int fx_size;          /* How many bytes are involved? */
  55
  56     fragS *fx_frag;             /* Which frag? */
  57     long fx_where;              /* Where is the 1st byte to fix up? */
  58     symbolS *fx_addsy;          /* NULL or Symbol whose value we add in. */
  59     symbolS *fx_subsy;          /* NULL or Symbol whose value we subtract. */
  60     valueT fx_offset;           /* Absolute number we add in. */
  61     struct fix *fx_next;        /* NULL or -> next fixS. */
  62     bit_fixS *fx_bit_fixP;      /* IF NULL no bitfix's to do */
  63 #ifdef BFD_ASSEMBLER
  64     bfd_reloc_code_real_type fx_r_type;
  65 #else
  66 #ifdef NEED_FX_R_TYPE
  67     /* Hack for machines where the type of reloc can't be
  68        worked out by looking at how big it is.  */
  69     int fx_r_type;
  70 #endif
  71 #endif
  72
  73     /* This field is sort of misnamed.  It appears to be a sort of random
  74        scratch field, for use by the back ends.  The main gas code doesn't
  75        do anything but initialize it to zero.  The use of it does need to
  76        be coordinated between the cpu and format files, though.  E.g., some
  77        coff targets pass the `addend' field from the cpu file via this
  78        field.  I don't know why the `fx_offset' field above can't be used
  79        for that; investigate later and document. KR  */
  80     valueT fx_addnumber;
  81   };
  82
  83 typedef struct fix fixS;
  84
  85 #ifndef BFD_ASSEMBLER
  86 extern char *next_object_file_charP;
  87
  88 #ifndef MANY_SEGMENTS
  89 COMMON fixS *text_fix_root, *text_fix_tail;     /* Chains fixSs. */
  90 COMMON fixS *data_fix_root, *data_fix_tail;     /* Chains fixSs. */
  91 COMMON fixS *bss_fix_root, *bss_fix_tail;       /* Chains fixSs. */
  92 #endif
  93 COMMON fixS **seg_fix_rootP, **seg_fix_tailP;   /* -> one of above. */
  94 #endif
  95
  96 extern long string_byte_count;
  97 extern int section_alignment[];
  98
  99 bit_fixS *bit_fix_new PARAMS ((int size, int offset, long base_type,
 100                                long base_adj, long min, long max, long add));
 101 void append PARAMS ((char **charPP, char *fromP, unsigned long length));
 102 void record_alignment PARAMS ((segT seg, int align));
 103 void write_object_file PARAMS ((void));
 104 void relax_segment PARAMS ((struct frag * seg_frag_root, segT seg_type));
 105
 106 #ifdef BFD_ASSEMBLER
 107 fixS *fix_new PARAMS ((fragS * frag, int where, int size,
 108                        symbolS * add_symbol, offsetT offset, int pcrel,
 109                        bfd_reloc_code_real_type r_type));
 110 fixS *fix_new_exp PARAMS ((fragS * frag, int where, int size,
 111                            expressionS *exp, int pcrel,
 112                            bfd_reloc_code_real_type r_type));
 113 #else
 114 fixS *fix_new PARAMS ((fragS * frag, int where, int size,
 115                        symbolS * add_symbol, offsetT offset, int pcrel,
 116                        int r_type));
 117 fixS *fix_new_exp PARAMS ((fragS * frag, int where, int size,
 118                            expressionS *exp, int pcrel, int r_type));
 119 #endif
 120
 121 /* end of write.h */