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Length: 2457 (0x999)
Types: TextFile
Notes: UNIX file
Names: »a.out.h«
└─⟦26887b7e0⟧ Bits:30009717 Comet 32 harddisk image
└─⟦28c352965⟧ »/a« UNIX Filesystem
└─⟦this⟧ »usr/include/a.out.h«
/*
* @(#)a.out.h 1.4 7/13/83
* @(#)Copyright (C) 1983 by National Semiconductor Corp.
*/
/*
* A.out file layout information:
*
* "+" indicates an addition to the Berkeley 4.1 format.
*
* Note:
* This file contains only an incomplete description of information
* present in an a.out file; it omits symbol table definitions.
*
* Complete symbol table definitions reside in <stab.h> and simplified
* definitions in <nlist.h>. These sets of definitions are not fully
* compatible with each other; symbol table information as defined in
* <nlist.h> does not correspond directly to a.out file contents, but
* instead is obtained by translating such information with nlist(3).
*/
/*
* Header prepended to each a.out file.
*/
struct exec {
long a_magic; /* magic number */
unsigned long a_text; /* size of text segment */
unsigned long a_data; /* size of initialized data */
unsigned long a_bss; /* size of uninitialized data */
unsigned long a_syms; /* size of symbol table */
unsigned long a_entry; /* entry point address */
unsigned long a_entry_mod; /*+entry point - mod number */
unsigned long a_trsize; /* size of text relocation -
* specifies relocation of link
* tables at present */
unsigned long a_drsize; /* size of data relocation -
* current assembler sets to zero */
unsigned long a_mod; /*+size of mod table within text */
unsigned long a_link; /*+size of link table within text */
unsigned long a_strings; /*+size of string table */
unsigned long a_text_addr; /*+address of text section in address space */
unsigned long a_mod_addr; /*+address of mod table in address space */
unsigned long a_dat_addr; /*+address of data section in address space */
};
#define OMAGIC 0407 /* old impure format */
#define NMAGIC 0410 /* read-only text */
#define ZMAGIC 0413 /* demand load format */
#define XMAGIC 0414 /*+demand load format
*+locations 0-1023 unmapped */
/*
* Macros that take exec structures as arguments and tell whether
* the file has a reasonable magic number or give offsets to
* text|symbols|strings.
*/
#define N_BADMAG(x) \
(((x).a_magic)!=OMAGIC && ((x).a_magic)!=NMAGIC && \
((x).a_magic)!=XMAGIC && ((x).a_magic)!=ZMAGIC)
#define N_TXTOFF(x) \
((x).a_magic>NMAGIC ? 1024 : sizeof (struct exec))
#define N_SYMOFF(x) \
(N_TXTOFF(x) + (x).a_text + (x).a_data \
+ (x).a_trsize + (x).a_drsize)
#define N_STROFF(x) \
(N_SYMOFF(x) + (x).a_syms)