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/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*
* @(#)a.out.h 5.1 (Berkeley) 5/30/85
*/
/*
* Definitions of the a.out header
* and magic numbers are shared with
* the kernel.
*/
#ifdef NeXT
#include "sys/exec.h"
#else
#include <sys/exec.h>
#endif
/*
* Macros which take exec structures as arguments and tell whether
* the file has a reasonable magic number or offsets to text|symbols|strings.
*/
#define N_BADMAG(x) \
(((x).a_magic)!=OMAGIC && ((x).a_magic)!=NMAGIC && ((x).a_magic)!=ZMAGIC)
#define N_TXTOFF(x) \
((x).a_magic==ZMAGIC ? 0 : 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)
/*
* Format of a relocation datum.
*/
struct relocation_info {
int r_address; /* address which is relocated */
unsigned int r_symbolnum:24, /* local symbol ordinal */
r_pcrel:1, /* was relocated pc relative already */
r_length:2, /* 0=byte, 1=word, 2=long */
r_extern:1, /* does not include value of sym referenced */
r_reserved:4; /* nothing, yet */
};
#define R_ABS 0 /* absolute relocation type for mach-O files */
/*
* Format of a symbol table entry; this file is included by <a.out.h>
* and should be used if you aren't interested the a.out header
* or relocation information.
*/
struct nlist {
union {
char *n_name; /* for use when in-core */
long n_strx; /* index into file string table */
} n_un;
unsigned char n_type; /* type flag, i.e. N_TEXT etc; see below */
unsigned char n_sect; /* section number for N_SECT types */
short n_desc; /* see <stab.h> */
unsigned long n_value; /* value of this symbol (or sdb offset) */
};
#define n_hash n_desc /* used internally by ld */
/*
* Simple values for n_type.
*/
#define N_UNDF 0x0 /* undefined */
#define N_ABS 0x2 /* absolute */
#define N_TEXT 0x4 /* text */
#define N_DATA 0x6 /* data */
#define N_BSS 0x8 /* bss */
#define N_INDR 0xa /* indirect */
#define N_SECT 0xe /* defined in section number n_sect */
#define N_COMM 0x12 /* common (internal to ld) */
#define N_FN 0x1f /* file name symbol */
#define N_EXT 01 /* external bit, or'ed in */
#define N_TYPE 0x1e /* mask for all the type bits */
/*
* If the value is N_SECT then the n_sect field contains an ordinal of the
* section the symbol is defined in. The sections are numbered from 1 and
* refer to sections in order they appear in the load commands for the file
* they are in. This means the same ordinal may very well refer to different
* sections in different files.
*
* The n_value field for all symbol table entries (including N_STAB's) gets
* updated by the link editor based on the value of it's n_sect field and where
* the section n_sect references gets relocated. If the value of the n_sect
* field is NO_SECT then it's n_value field is not changed by the link editor.
*/
#define NO_SECT 0 /* symbol is not in any section */
#define MAX_SECT 255 /* 1 thru 255 inclusive */
/*
* Sdb entries have some of the N_STAB bits set.
* These are given in <stab.h>
*/
#define N_STAB 0xe0 /* if any of these bits set, a SDB entry */
/*
* Format for namelist values.
*/
#define N_FORMAT "%08x"
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