gas/write.h

   1 /* write.h
   2
   3    Copyright (C) 1987, 1992 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 /* The bit_fix was implemented to support machines that need variables
  39    to be inserted in bitfields other than 1, 2 and 4 bytes.
  40    Furthermore it gives us a possibillity to mask in bits in the symbol
  41    when it's fixed in the objectcode and check the symbols limits.
  42
  43    The or-mask is used to set the huffman bits in displacements for the
  44    ns32k port.
  45    The acbi, addqi, movqi, cmpqi instruction requires an assembler that
  46    can handle bitfields. Ie handle an expression, evaluate it and insert
  47    the result in an some bitfield. ( ex: 5 bits in a short field of a opcode)
  48    */
  49
  50 struct bit_fix {
  51         int                     fx_bit_size;    /* Length of bitfield           */
  52         int                     fx_bit_offset;  /* Bit offset to bitfield       */
  53         long                    fx_bit_base;    /* Where do we apply the bitfix.
  54                                                    If this is zero, default is assumed. */
  55         long                  fx_bit_base_adj;/* Adjustment of base */
  56         long                    fx_bit_max;     /* Signextended max for bitfield */
  57         long                    fx_bit_min;     /* Signextended min for bitfield */
  58         long                    fx_bit_add;     /* Or mask, used for huffman prefix */
  59 };
  60 typedef struct bit_fix bit_fixS;
  61 /*
  62  * FixSs may be built up in any order.
  63  */
  64
  65 struct fix {
  66         fragS *fx_frag; /* Which frag? */
  67         long fx_where;  /* Where is the 1st byte to fix up? */
  68         symbolS *fx_addsy; /* NULL or Symbol whose value we add in. */
  69         symbolS *fx_subsy; /* NULL or Symbol whose value we subtract. */
  70         long fx_offset; /* Absolute number we add in. */
  71         struct fix *fx_next;    /* NULL or -> next fixS. */
  72         short int fx_size;      /* How many bytes are involved? */
  73         char fx_pcrel;  /* TRUE: pc-relative. */
  74         char fx_pcrel_adjust;/* pc-relative offset adjust */
  75         char fx_im_disp;        /* TRUE: value is a displacement */
  76         bit_fixS *fx_bit_fixP;  /* IF NULL no bitfix's to do */
  77         char fx_bsr;            /* sequent-hack */
  78         enum reloc_type fx_r_type;      /* Sparc hacks */
  79         char fx_callj;  /* TRUE if target is a 'callj'
  80                            (used by i960) */
  81         long fx_addnumber;
  82 };
  83
  84 typedef struct fix fixS;
  85
  86 COMMON 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 #endif
  92 COMMON fixS **seg_fix_rootP, **seg_fix_tailP;   /* -> one of above. */
  93 extern long string_byte_count;
  94 extern int section_alignment[];
  95
  96 #if __STDC__ == 1
  97
  98 bit_fixS *bit_fix_new(char size, char offset, long base_type, long base_adj, long min, long max, long add);
  99 void append(char **charPP, char *fromP, unsigned long length);
 100 void record_alignment(segT seg, int align);
 101 void write_object_file(void);
 102
 103 fixS *fix_new(fragS *frag,
 104               int where,
 105               int size,
 106               symbolS *add_symbol,
 107               symbolS *sub_symbol,
 108               long offset,
 109               int pcrel,
 110               enum reloc_type r_type);
 111
 112 #else /* not __STDC__ */
 113
 114 bit_fixS *bit_fix_new();
 115 fixS *fix_new();
 116 void append();
 117 void record_alignment();
 118 void write_object_file();
 119
 120 #endif /* not __STDC__ */
 121
 122 /*
 123  * Local Variables:
 124  * comment-column: 0
 125  * fill-column: 131
 126  * End:
 127  */
 128
 129 /* end of write.h */