1  /* Mach-O object file format for gas, the assembler.
       2     Copyright (C) 2009-2023 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 */