[unix-history] / usr / include / a.out.h

struct	exec {	/* a.out header */
	int     	a_magic;	/* magic number */
	unsigned	a_text; 	/* size of text segment */
	unsigned	a_data; 	/* size of initialized data */
	unsigned	a_bss;  	/* size of unitialized data */
	unsigned	a_syms; 	/* size of symbol table */
	unsigned	a_entry; 	/* entry point */
	unsigned	a_unused;	/* not used */
	unsigned	a_flag; 	/* relocation info stripped */
};

#define	A_MAGIC1	0407       	/* normal */
#define	A_MAGIC2	0410       	/* read-only text */
#define	A_MAGIC3	0411       	/* separated I&D */
#define	A_MAGIC4	0405       	/* overlay */

struct	nlist {	/* symbol table entry */
	char    	n_name[8];	/* symbol name */
	int     	n_type;    	/* type flag */
	unsigned	n_value;	/* value */
};

		/* values for type flag */
#define	N_UNDF	0	/* undefined */
#define	N_ABS	01	/* absolute */
#define	N_TEXT	02	/* text symbol */
#define	N_DATA	03	/* data symbol */
#define	N_BSS	04	/* bss symbol */
#define	N_TYPE	037
#define	N_REG	024	/* register name */
#define	N_FN	037	/* file name symbol */
#define	N_EXT	040	/* external bit, or'ed in */
#define	FORMAT	"%06o"	/* to print a value */
Commit	Line	Data
caf79156 KT	1	struct exec { /* a.out header */
	2	int a_magic; /* magic number */
	3	unsigned a_text; /* size of text segment */
	4	unsigned a_data; /* size of initialized data */
	5	unsigned a_bss; /* size of unitialized data */
	6	unsigned a_syms; /* size of symbol table */
	7	unsigned a_entry; /* entry point */
	8	unsigned a_unused; /* not used */
	9	unsigned a_flag; /* relocation info stripped */
	10	};
	11
	12	#define A_MAGIC1 0407 /* normal */
	13	#define A_MAGIC2 0410 /* read-only text */
	14	#define A_MAGIC3 0411 /* separated I&D */
	15	#define A_MAGIC4 0405 /* overlay */
	16
	17	struct nlist { /* symbol table entry */
	18	char n_name[8]; /* symbol name */
	19	int n_type; /* type flag */
	20	unsigned n_value; /* value */
	21	};
	22
	23	/* values for type flag */
	24	#define N_UNDF 0 /* undefined */
	25	#define N_ABS 01 /* absolute */
	26	#define N_TEXT 02 /* text symbol */
	27	#define N_DATA 03 /* data symbol */
	28	#define N_BSS 04 /* bss symbol */
	29	#define N_TYPE 037
	30	#define N_REG 024 /* register name */
	31	#define N_FN 037 /* file name symbol */
	32	#define N_EXT 040 /* external bit, or'ed in */
	33	#define FORMAT "%06o" /* to print a value */