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4c63da97a7
assembler. ie. You will be able to do "as --em=i386aout" on an x86 linux-elf assembler to generate aout format object files, rather than using a separate assembler. The aout emulation is enabled by giving "--enable-targets=i386-linuxaout" to configure. Oh yeah, there's a couple of fixes too. Error messages shouldn't be passed to printf in the format arg just in case someone puts a `%' in the message.
253 lines
8.5 KiB
C
253 lines
8.5 KiB
C
/* obj-aout.h, a.out object file format for gas, the assembler.
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Copyright (C) 1989, 90, 91, 92, 93, 94, 95, 96, 98, 99, 2000
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Free Software Foundation, Inc.
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This file is part of GAS, the GNU Assembler.
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GAS is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2,
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or (at your option) any later version.
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GAS is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GAS; see the file COPYING. If not, write to the Free
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Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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/* Tag to validate a.out object file format processing */
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#define OBJ_AOUT 1
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#include "targ-cpu.h"
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#ifdef BFD_ASSEMBLER
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#include "bfd/libaout.h"
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#define OUTPUT_FLAVOR bfd_target_aout_flavour
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#else /* ! BFD_ASSEMBLER */
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#ifndef VMS
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#include "aout_gnu.h" /* Needed to define struct nlist. Sigh. */
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#else
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#include "a_out.h"
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#endif
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#ifndef AOUT_MACHTYPE
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#define AOUT_MACHTYPE 0
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#endif /* AOUT_MACHTYPE */
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extern const short seg_N_TYPE[];
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extern const segT N_TYPE_seg[];
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#ifndef DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE
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#define DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE (OMAGIC)
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#endif /* DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE */
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#endif /* ! BFD_ASSEMBLER */
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extern const pseudo_typeS aout_pseudo_table[];
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#ifndef obj_pop_insert
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#define obj_pop_insert() pop_insert (aout_pseudo_table)
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#endif
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/* SYMBOL TABLE */
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/* Symbol table entry data type */
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typedef struct nlist obj_symbol_type; /* Symbol table entry */
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/* Symbol table macros and constants */
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#ifdef BFD_ASSEMBLER
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#define S_SET_OTHER(S,V) \
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(aout_symbol (symbol_get_bfdsym (S))->other = (V))
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#define S_SET_TYPE(S,T) \
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(aout_symbol (symbol_get_bfdsym (S))->type = (T))
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#define S_SET_DESC(S,D) \
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(aout_symbol (symbol_get_bfdsym (S))->desc = (D))
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#define S_GET_OTHER(S) \
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(aout_symbol (symbol_get_bfdsym (S))->other)
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#define S_GET_TYPE(S) \
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(aout_symbol (symbol_get_bfdsym (S))->type)
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#define S_GET_DESC(S) \
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(aout_symbol (symbol_get_bfdsym (S))->desc)
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asection *text_section, *data_section, *bss_section;
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#define obj_frob_symbol(S,PUNT) obj_aout_frob_symbol (S, &PUNT)
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#define obj_frob_file() obj_aout_frob_file ()
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extern void obj_aout_frob_symbol PARAMS ((symbolS *, int *));
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extern void obj_aout_frob_file PARAMS ((void));
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#define obj_sec_sym_ok_for_reloc(SEC) (1)
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#else
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/* We use the sy_obj field to record whether a symbol is weak. */
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#define OBJ_SYMFIELD_TYPE char
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/*
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* Macros to extract information from a symbol table entry.
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* This syntaxic indirection allows independence regarding a.out or coff.
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* The argument (s) of all these macros is a pointer to a symbol table entry.
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*/
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/* True if the symbol is external */
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#define S_IS_EXTERNAL(s) ((s)->sy_symbol.n_type & N_EXT)
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/* True if symbol has been defined, ie is in N_{TEXT,DATA,BSS,ABS} or N_EXT */
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#define S_IS_DEFINED(s) \
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(S_GET_TYPE (s) != N_UNDF || S_GET_DESC (s) != 0)
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#define S_IS_COMMON(s) \
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(S_GET_TYPE (s) == N_UNDF && S_GET_VALUE (s) != 0)
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#define S_IS_REGISTER(s) ((s)->sy_symbol.n_type == N_REGISTER)
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/* True if a debug special symbol entry */
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#define S_IS_DEBUG(s) ((s)->sy_symbol.n_type & N_STAB)
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/* True if a symbol is local symbol name */
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#define S_IS_LOCAL(s) \
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((S_GET_NAME (s) \
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&& !S_IS_DEBUG (s) \
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&& (strchr (S_GET_NAME (s), '\001') != NULL \
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|| strchr (S_GET_NAME (s), '\002') != NULL \
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|| (S_LOCAL_NAME(s) && !flag_keep_locals))) \
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|| (flag_strip_local_absolute \
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&& ! S_IS_EXTERNAL(s) \
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&& S_GET_SEGMENT (s) == absolute_section))
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/* True if a symbol is not defined in this file */
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#define S_IS_EXTERN(s) ((s)->sy_symbol.n_type & N_EXT)
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/* True if the symbol has been generated because of a .stabd directive */
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#define S_IS_STABD(s) (S_GET_NAME(s) == (char *)0)
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/* Accessors */
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/* The name of the symbol */
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#define S_GET_NAME(s) ((s)->sy_symbol.n_un.n_name)
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/* The pointer to the string table */
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#define S_GET_OFFSET(s) ((s)->sy_symbol.n_un.n_strx)
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/* The type of the symbol */
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#define S_GET_TYPE(s) ((s)->sy_symbol.n_type & N_TYPE)
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/* The numeric value of the segment */
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#define S_GET_SEGMENT(s) (N_TYPE_seg[S_GET_TYPE(s)])
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/* The n_other expression value */
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#define S_GET_OTHER(s) ((s)->sy_symbol.n_other)
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/* The n_desc expression value */
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#define S_GET_DESC(s) ((s)->sy_symbol.n_desc)
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/* Whether the symbol is weak. */
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#define S_GET_WEAK(s) ((s)->sy_obj)
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/* Modifiers */
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/* Assume that a symbol cannot be simultaneously in more than on segment */
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/* set segment */
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#define S_SET_SEGMENT(s,seg) ((s)->sy_symbol.n_type &= ~N_TYPE,(s)->sy_symbol.n_type|=SEGMENT_TO_SYMBOL_TYPE(seg))
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/* The symbol is external */
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#define S_SET_EXTERNAL(s) ((s)->sy_symbol.n_type |= N_EXT)
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/* The symbol is not external */
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#define S_CLEAR_EXTERNAL(s) ((s)->sy_symbol.n_type &= ~N_EXT)
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/* Set the name of the symbol */
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#define S_SET_NAME(s,v) ((s)->sy_symbol.n_un.n_name = (v))
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/* Set the offset in the string table */
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#define S_SET_OFFSET(s,v) ((s)->sy_symbol.n_un.n_strx = (v))
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/* Set the n_type field */
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#define S_SET_TYPE(s,t) ((s)->sy_symbol.n_type = (t))
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/* Set the n_other expression value */
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#define S_SET_OTHER(s,v) ((s)->sy_symbol.n_other = (v))
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/* Set the n_desc expression value */
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#define S_SET_DESC(s,v) ((s)->sy_symbol.n_desc = (v))
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/* Mark the symbol as weak. This causes n_type to be adjusted when
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the symbol is written out. */
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#define S_SET_WEAK(s) ((s)->sy_obj = 1)
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/* File header macro and type definition */
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#define H_GET_FILE_SIZE(h) (H_GET_HEADER_SIZE(h) \
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+ H_GET_TEXT_SIZE(h) \
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+ H_GET_DATA_SIZE(h) \
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+ H_GET_SYMBOL_TABLE_SIZE(h) \
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+ H_GET_TEXT_RELOCATION_SIZE(h) \
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+ H_GET_DATA_RELOCATION_SIZE(h) \
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+ H_GET_STRING_SIZE(h))
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#define H_GET_HEADER_SIZE(h) (EXEC_BYTES_SIZE)
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#define H_GET_TEXT_SIZE(h) ((h)->header.a_text)
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#define H_GET_DATA_SIZE(h) ((h)->header.a_data)
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#define H_GET_BSS_SIZE(h) ((h)->header.a_bss)
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#define H_GET_TEXT_RELOCATION_SIZE(h) ((h)->header.a_trsize)
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#define H_GET_DATA_RELOCATION_SIZE(h) ((h)->header.a_drsize)
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#define H_GET_SYMBOL_TABLE_SIZE(h) ((h)->header.a_syms)
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#define H_GET_ENTRY_POINT(h) ((h)->header.a_entry)
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#define H_GET_STRING_SIZE(h) ((h)->string_table_size)
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#define H_GET_LINENO_SIZE(h) (0)
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#define H_GET_DYNAMIC(h) ((h)->header.a_info >> 31)
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#define H_GET_VERSION(h) (((h)->header.a_info >> 24) & 0x7f)
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#define H_GET_MACHTYPE(h) (((h)->header.a_info >> 16) & 0xff)
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#define H_GET_MAGIC_NUMBER(h) ((h)->header.a_info & 0xffff)
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#define H_SET_DYNAMIC(h,v) ((h)->header.a_info = (((v) << 31) \
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| (H_GET_VERSION(h) << 24) \
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| (H_GET_MACHTYPE(h) << 16) \
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| (H_GET_MAGIC_NUMBER(h))))
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#define H_SET_VERSION(h,v) ((h)->header.a_info = ((H_GET_DYNAMIC(h) << 31) \
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| ((v) << 24) \
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| (H_GET_MACHTYPE(h) << 16) \
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| (H_GET_MAGIC_NUMBER(h))))
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#define H_SET_MACHTYPE(h,v) ((h)->header.a_info = ((H_GET_DYNAMIC(h) << 31) \
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| (H_GET_VERSION(h) << 24) \
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| ((v) << 16) \
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| (H_GET_MAGIC_NUMBER(h))))
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#define H_SET_MAGIC_NUMBER(h,v) ((h)->header.a_info = ((H_GET_DYNAMIC(h) << 31) \
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| (H_GET_VERSION(h) << 24) \
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| (H_GET_MACHTYPE(h) << 16) \
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| ((v))))
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#define H_SET_TEXT_SIZE(h,v) ((h)->header.a_text = md_section_align(SEG_TEXT, (v)))
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#define H_SET_DATA_SIZE(h,v) ((h)->header.a_data = md_section_align(SEG_DATA, (v)))
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#define H_SET_BSS_SIZE(h,v) ((h)->header.a_bss = md_section_align(SEG_BSS, (v)))
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#define H_SET_RELOCATION_SIZE(h,t,d) (H_SET_TEXT_RELOCATION_SIZE((h),(t)),\
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H_SET_DATA_RELOCATION_SIZE((h),(d)))
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#define H_SET_TEXT_RELOCATION_SIZE(h,v) ((h)->header.a_trsize = (v))
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#define H_SET_DATA_RELOCATION_SIZE(h,v) ((h)->header.a_drsize = (v))
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#define H_SET_SYMBOL_TABLE_SIZE(h,v) ((h)->header.a_syms = (v) * 12)
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#define H_SET_ENTRY_POINT(h,v) ((h)->header.a_entry = (v))
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#define H_SET_STRING_SIZE(h,v) ((h)->string_table_size = (v))
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typedef struct
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{
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struct exec header; /* a.out header */
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long string_table_size; /* names + '\0' + sizeof(int) */
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}
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object_headers;
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/* line numbering stuff. */
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#define OBJ_EMIT_LINENO(a, b, c) {;}
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struct fix;
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void tc_aout_fix_to_chars PARAMS ((char *where, struct fix *fixP, relax_addressT segment_address));
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#endif
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#define obj_read_begin_hook() {;}
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#define obj_symbol_new_hook(s) {;}
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#define EMIT_SECTION_SYMBOLS 0
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#define AOUT_STABS
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/* end of obj-aout.h */
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