gas/config/obj-macho.h

   1 /* Mach-O object file format for gas, the assembler.
   2    Copyright 2009, 2011, 2012 Free Software Foundation, Inc.
   3
   4    This file is part of GAS, the GNU Assembler.
   5
   6    GAS is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as
   8    published by the Free Software Foundation; either version 3,
   9    or (at your option) any later version.
  10
  11    GAS is distributed in the hope that it will be useful, but
  12    WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  14    the GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with GAS; see the file COPYING.  If not, write to the Free
  18    Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
  19    02110-1301, USA.  */
  20
  21 #ifndef _OBJ_MACH_O_H
  22 #define _OBJ_MACH_O_H
  23
  24 /* Tag to validate Mach-O object file format processing */
  25 #define OBJ_MACH_O 1
  26
  27 #include "bfd/mach-o.h"
  28
  29 #include "targ-cpu.h"
  30
  31 #define OUTPUT_FLAVOR bfd_target_mach_o_flavour
  32
  33 /* We want to control how the sections are pre-defined on startup.  */
  34 #define obj_begin() mach_o_begin ()
  35 extern void mach_o_begin (void);
  36
  37 /* All our align expressions are power of two.  */
  38 #define USE_ALIGN_PTWO 1
  39
  40 /* Common symbols can carry alignment information.  */
  41 #ifndef S_SET_ALIGN
  42 #define S_SET_ALIGN(S,V) do {\
  43   bfd_mach_o_asymbol *___s = (bfd_mach_o_asymbol *) symbol_get_bfdsym (S);\
  44   ___s->n_desc = (___s->n_desc & 0xf0ff) | (((V) & 0x0f) << 8);\
  45 } while (0)
  46 #endif
  47
  48 extern const pseudo_typeS mach_o_pseudo_table[];
  49
  50 #ifndef obj_pop_insert
  51 #define obj_pop_insert() pop_insert (mach_o_pseudo_table)
  52 #endif
  53
  54 #define obj_sec_sym_ok_for_reloc(SEC)   1
  55
  56 #define obj_read_begin_hook()   {;}
  57 #define obj_symbol_new_hook(s)  {;}
  58
  59 #define EMIT_SECTION_SYMBOLS            0
  60
  61 struct obj_mach_o_symbol_data
  62 {
  63   /* If the symbol represents a subsection, this is the size of the subsection.
  64      This is used to check whether a local symbol belongs to a subsection.  */
  65   valueT subsection_size;
  66 };
  67 #define OBJ_SYMFIELD_TYPE struct obj_mach_o_symbol_data
  68
  69 #define obj_frob_colon obj_mach_o_frob_colon
  70 extern void obj_mach_o_frob_colon (const char *);
  71
  72 /* Called when a label is defined.  Mach-O uses this to create subsections.  */
  73 #define obj_frob_label obj_mach_o_frob_label
  74 extern void obj_mach_o_frob_label (symbolS *);
  75
  76 #define obj_frob_symbol(s, punt) punt = obj_mach_o_frob_symbol(s)
  77 extern int obj_mach_o_frob_symbol (struct symbol *);
  78
  79 #define OBJ_PROCESS_STAB(SEG,W,S,T,O,D) obj_mach_o_process_stab(W,S,T,O,D)
  80 extern void obj_mach_o_process_stab (int, const char *,int, int, int);
  81
  82 struct obj_mach_o_frag_data
  83 {
  84   /* Symbol that corresponds to the subsection.  */
  85   symbolS *subsection;
  86 };
  87
  88 #define OBJ_FRAG_TYPE struct obj_mach_o_frag_data
  89
  90 #define md_pre_output_hook obj_mach_o_pre_output_hook()
  91 extern void obj_mach_o_pre_output_hook(void);
  92
  93 #define md_pre_relax_hook obj_mach_o_pre_relax_hook()
  94 extern void obj_mach_o_pre_relax_hook (void);
  95
  96 #define md_post_relax_hook obj_mach_o_post_relax_hook()
  97 extern void obj_mach_o_post_relax_hook (void);
  98
  99 #define obj_frob_file_after_relocs obj_mach_o_frob_file_after_relocs
 100 extern void obj_mach_o_frob_file_after_relocs (void);
 101
 102 #define SET_SECTION_RELOCS(sec, relocs, n) \
 103   obj_mach_o_reorder_section_relocs (sec, relocs, n)
 104 extern void obj_mach_o_reorder_section_relocs (asection *, arelent **,
 105                                                unsigned int);
 106
 107 /* Emit relocs for local subtracts, to cater for subsections-via-symbols.  */
 108 #define md_allow_local_subtract(LEFT, RIGHT, SECTION) \
 109  obj_mach_o_allow_local_subtract (LEFT, RIGHT, SECTION)
 110 extern int obj_mach_o_allow_local_subtract (expressionS *, expressionS *,
 111                                             segT);
 112
 113 struct fix;
 114 extern int obj_mach_o_in_different_subsection (symbolS *a, symbolS *b);
 115 extern int obj_mach_o_force_reloc (struct fix *fix);
 116 extern int obj_mach_o_force_reloc_sub_same (struct fix *fix, segT seg);
 117 extern int obj_mach_o_force_reloc_sub_local (struct fix *fix, segT seg);
 118
 119 #endif /* _OBJ_MACH_O_H */