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Diffstat (limited to 'gas/config/obj-aout.h')
-rw-r--r-- | gas/config/obj-aout.h | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/gas/config/obj-aout.h b/gas/config/obj-aout.h new file mode 100644 index 0000000..602d760 --- /dev/null +++ b/gas/config/obj-aout.h @@ -0,0 +1,187 @@ +/* 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 + +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 */ |