78 lines
2.3 KiB
C
78 lines
2.3 KiB
C
|
/****************************************************************
|
||
|
|
* *
|
||
|
|
* Copyright 2001 Sanchez Computer Associates, Inc. *
|
||
|
|
* *
|
||
|
|
* This source code contains the intellectual property *
|
||
|
|
* of its copyright holder(s), and is made available *
|
||
|
|
* under a license. If you do not know the terms of *
|
||
|
|
* the license, please stop and do not read further. *
|
||
|
|
* *
|
||
|
|
****************************************************************/
|
||
|
|
|
||
|
|
struct exec {
|
||
|
|
short a_magic; /* magic number */
|
||
|
|
short a_stamp; /* version stamp - RTU 2.0+ uses this - see below */
|
||
|
|
uint4 a_text; /* size of text segment */
|
||
|
|
uint4 a_data; /* size of initialized data */
|
||
|
|
uint4 a_bss; /* size of uninitialized data */
|
||
|
|
uint4 a_syms; /* size of symbol table */
|
||
|
|
uint4 a_entry; /* entry point */
|
||
|
|
uint4 a_trsize; /* size of text relocation */
|
||
|
|
uint4 a_drsize; /* size of data relocation */
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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=int4 */
|
||
|
|
r_extern:1, /* does not include value of sym referenced */
|
||
|
|
r_pad:4; /* nothing, yet */
|
||
|
|
};
|
||
|
|
|
||
|
|
struct rel_table {
|
||
|
|
struct rel_table *next, *resolve;
|
||
|
|
struct relocation_info r;
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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 {
|
||
|
|
int4 n_strx; /* index into file string table */
|
||
|
|
unsigned char n_type; /* type flag, i.e. N_TEXT etc; see below */
|
||
|
|
char n_other; /* unused */
|
||
|
|
short n_desc; /* see <stab.h> */
|
||
|
|
uint4 n_value; /* value of this symbol (or sdb offset) */
|
||
|
|
};
|
||
|
|
|
||
|
|
struct sym_table {
|
||
|
|
struct sym_table *next;
|
||
|
|
struct nlist n;
|
||
|
|
struct rel_table *resolve;
|
||
|
|
unsigned short name_len;
|
||
|
|
unsigned char name[1];
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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_IPCOMM 0x16 /* initialized private */
|
||
|
|
#define N_PCOMM 0x18 /* uninitialized private */
|
||
|
|
#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 */
|
||
|
|
|