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/* a.out object file format
Copyright (C) 1989, 1990, 1991 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
GAS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 1,
or (at your option) any later version.
GAS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
the GNU General Public License for more details.
You should have received a copy of the GNU General Public
License along with GAS; see the file COPYING. If not, write
to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* $Id$ */
/* Tag to validate a.out object file format processing */
#define OBJ_AOUT 1
#include "targ-cpu.h"
#ifndef VMS
#include "a.out.gnu.h" /* Needed to define struct nlist. Sigh. */
#else
#include "a_out.h"
#endif
struct reloc_info_generic
{
unsigned long r_address;
/*
* Using bit fields here is a bad idea because the order is not portable. :-(
*/
unsigned int r_index;
#define r_symbolnum r_index
unsigned r_extern : 1;
unsigned r_pcrel:1;
unsigned r_length:2; /* 0=>byte 1=>short 2=>long 3=>8byte */
unsigned r_bsr:1; /* NS32K */
unsigned r_disp:1; /* NS32k */
unsigned r_callj:1; /* i960 */
enum reloc_type r_type;
long r_addend;
};
extern const short seg_N_TYPE[];
extern const segT N_TYPE_seg[];
#ifndef DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE
#define DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE (OMAGIC)
#endif /* DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE */
/* SYMBOL TABLE */
/* Symbol table entry data type */
typedef struct nlist obj_symbol_type; /* Symbol table entry */
/* If compiler generate leading underscores, remove them. */
#ifndef STRIP_UNDERSCORE
#define STRIP_UNDERSCORE 0
#endif /* STRIP_UNDERSCORE */
/* Symbol table macros and constants */
/*
* Macros to extract information from a symbol table entry.
* This syntaxic indirection allows independence regarding a.out or coff.
* The argument (s) of all these macros is a pointer to a symbol table entry.
*/
/* True if the symbol is external */
#define S_IS_EXTERNAL(s) ((s)->sy_symbol.n_type & N_EXT)
/* True if symbol has been defined, ie is in N_{TEXT,DATA,BSS,ABS} or N_EXT */
#define S_IS_DEFINED(s) ((S_GET_TYPE(s) != N_UNDF) || (S_GET_OTHER(s) != 0) || (S_GET_DESC(s) != 0))
#define S_IS_REGISTER(s) ((s)->sy_symbol.n_type == N_REGISTER)
/* True if a debug special symbol entry */
#define S_IS_DEBUG(s) ((s)->sy_symbol.n_type & N_STAB)
/* True if a symbol is local symbol name */
/* A symbol name whose name begin with ^A is a gas internal pseudo symbol
nameless symbols come from .stab directives. */
#define S_IS_LOCAL(s) (S_GET_NAME(s) && \
!S_IS_DEBUG(s) && \
(S_GET_NAME(s)[0] == '\001' || \
(S_LOCAL_NAME(s) && !flagseen['L'])))
/* True if a symbol is not defined in this file */
#define S_IS_EXTERN(s) ((s)->sy_symbol.n_type & N_EXT)
/* True if the symbol has been generated because of a .stabd directive */
#define S_IS_STABD(s) (S_GET_NAME(s) == (char *)0)
/* Accessors */
/* The value of the symbol */
#define S_GET_VALUE(s) (((s)->sy_symbol.n_value))
/* The name of the symbol */
#define S_GET_NAME(s) ((s)->sy_symbol.n_un.n_name)
/* The pointer to the string table */
#define S_GET_OFFSET(s) ((s)->sy_symbol.n_un.n_strx)
/* The type of the symbol */
#define S_GET_TYPE(s) ((s)->sy_symbol.n_type & N_TYPE)
/* The numeric value of the segment */
#define S_GET_SEGMENT(s) (N_TYPE_seg[S_GET_TYPE(s)])
/* The n_other expression value */
#define S_GET_OTHER(s) ((s)->sy_symbol.n_other)
/* The n_desc expression value */
#define S_GET_DESC(s) ((s)->sy_symbol.n_desc)
/* Modifiers */
/* Set the value of the symbol */
#define S_SET_VALUE(s,v) ((s)->sy_symbol.n_value = (unsigned long) (v))
/* Assume that a symbol cannot be simultaneously in more than on segment */
/* set segment */
#define S_SET_SEGMENT(s,seg) ((s)->sy_symbol.n_type &= ~N_TYPE,(s)->sy_symbol.n_type|=SEGMENT_TO_SYMBOL_TYPE(seg))
/* The symbol is external */
#define S_SET_EXTERNAL(s) ((s)->sy_symbol.n_type |= N_EXT)
/* The symbol is not external */
#define S_CLEAR_EXTERNAL(s) ((s)->sy_symbol.n_type &= ~N_EXT)
/* Set the name of the symbol */
#define S_SET_NAME(s,v) ((s)->sy_symbol.n_un.n_name = (v))
/* Set the offset in the string table */
#define S_SET_OFFSET(s,v) ((s)->sy_symbol.n_un.n_strx = (v))
/* Set the n_other expression value */
#define S_SET_OTHER(s,v) ((s)->sy_symbol.n_other = (v))
/* Set the n_desc expression value */
#define S_SET_DESC(s,v) ((s)->sy_symbol.n_desc = (v))
/* File header macro and type definition */
#define H_GET_FILE_SIZE(h) (sizeof(struct exec) + \
H_GET_TEXT_SIZE(h) + H_GET_DATA_SIZE(h) + \
H_GET_SYMBOL_TABLE_SIZE(h) + \
H_GET_TEXT_RELOCATION_SIZE(h) + \
H_GET_DATA_RELOCATION_SIZE(h) + \
(h)->string_table_size)
#define H_GET_TEXT_SIZE(h) ((h)->header.a_text)
#define H_GET_DATA_SIZE(h) ((h)->header.a_data)
#define H_GET_BSS_SIZE(h) ((h)->header.a_bss)
#define H_GET_TEXT_RELOCATION_SIZE(h) ((h)->header.a_trsize)
#define H_GET_DATA_RELOCATION_SIZE(h) ((h)->header.a_drsize)
#define H_GET_SYMBOL_TABLE_SIZE(h) ((h)->header.a_syms)
#define H_GET_MAGIC_NUMBER(h) ((h)->header.a_info)
#define H_GET_ENTRY_POINT(h) ((h)->header.a_entry)
#define H_GET_STRING_SIZE(h) ((h)->string_table_size)
#ifdef EXEC_MACHINE_TYPE
#define H_GET_MACHINE_TYPE(h) ((h)->header.a_machtype)
#endif /* EXEC_MACHINE_TYPE */
#ifdef EXEC_VERSION
#define H_GET_VERSION(h) ((h)->header.a_version)
#endif /* EXEC_VERSION */
#define H_SET_TEXT_SIZE(h,v) ((h)->header.a_text = md_section_align(SEG_TEXT, (v)))
#define H_SET_DATA_SIZE(h,v) ((h)->header.a_data = md_section_align(SEG_DATA, (v)))
#define H_SET_BSS_SIZE(h,v) ((h)->header.a_bss = md_section_align(SEG_BSS, (v)))
#define H_SET_RELOCATION_SIZE(h,t,d) (H_SET_TEXT_RELOCATION_SIZE((h),(t)),\
H_SET_DATA_RELOCATION_SIZE((h),(d)))
#define H_SET_TEXT_RELOCATION_SIZE(h,v) ((h)->header.a_trsize = (v))
#define H_SET_DATA_RELOCATION_SIZE(h,v) ((h)->header.a_drsize = (v))
#define H_SET_SYMBOL_TABLE_SIZE(h,v) ((h)->header.a_syms = (v) * \
sizeof(struct nlist))
#define H_SET_MAGIC_NUMBER(h,v) ((h)->header.a_info = (v))
#define H_SET_ENTRY_POINT(h,v) ((h)->header.a_entry = (v))
#define H_SET_STRING_SIZE(h,v) ((h)->string_table_size = (v))
#ifdef EXEC_MACHINE_TYPE
#define H_SET_MACHINE_TYPE(h,v) ((h)->header.a_machtype = (v))
#endif /* EXEC_MACHINE_TYPE */
#ifdef EXEC_VERSION
#define H_SET_VERSION(h,v) ((h)->header.a_version = (v))
#endif /* EXEC_VERSION */
/*
* Current means for getting the name of a segment.
* This will change for infinite-segments support (e.g. COFF).
*/
#define segment_name(seg) ( seg_name[(int)(seg)] )
extern char *const seg_name[];
typedef struct {
struct exec header; /* a.out header */
long string_table_size; /* names + '\0' + sizeof(int) */
} object_headers;
/* line numbering stuff. */
#define OBJ_EMIT_LINENO(a, b, c) ;
#define obj_pre_write_hook(a) ;
/*
* Local Variables:
* comment-column: 0
* fill-column: 131
* End:
*/
/* end of obj-aout.h */
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