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sun3.md
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a.out.h
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1991-06-06
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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 5.2 (Berkeley) 4/7/87
*/
/*
* Definitions of the a.out header
* and magic numbers are shared with
* the kernel.
*/
#ifndef _AOUT
#define _AOUT
#include <sun3.md/sys/exec.h>
extern int Aout_PageSize[];
/*
* Macro to tell whether or not the magic number in an a.out file
* is an illegal one.
*/
#define N_BADMAG(x) \
(((x).a_magic)!=OMAGIC && \
((x).a_magic)!=NMAGIC && \
((x).a_magic)!=ZMAGIC && \
((x).a_magic)!=SPRITE_ZMAGIC && \
((x).a_magic)!=UNIX_ZMAGIC)
/*
* Macros to tell where various pieces of information start in the
* a.out file.
*/
#define N_PAGSIZ(x) (Aout_PageSize[(x).a_machtype])
#define N_TXTOFF(x) \
(((x).a_magic==ZMAGIC || (x).a_magic==UNIX_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)
/*
* Macros to tell where the various segments start in virtual memory,
* when the process is loaded.
*/
#include <sun3.md/kernel/procMach.h>
#define N_TXTADDR(x) PROC_CODE_LOAD_ADDR(*((ProcExecHeader *) &(x)))
#define N_DATADDR(x) PROC_DATA_LOAD_ADDR(*((ProcExecHeader *) &(x)))
#define N_BSSADDR(x) PROC_BSS_LOAD_ADDR(*((ProcExecHeader *) &(x)))
/*
* 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 */
:4; /* nothing, yet */
};
/*
* 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 */
char n_other; /* unused */
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_COMM 0x12 /* common (internal to ld) */
#define N_FN 0x1e /* file name symbol */
#define N_EXT 01 /* external bit, or'ed in */
#define N_TYPE 0x1e /* mask for all the type bits */
/*
* 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"
#endif /* _AOUT */