minix/commands/autil/out.h
2005-04-21 14:53:53 +00:00

126 lines
3.5 KiB
C
Executable file

/*
* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
* See the copyright notice in the ACK home directory, in the file "Copyright".
*/
/* $Header$ */
#ifndef __OUT_H_INCLUDED
#define __OUT_H_INCLUDED
/*
* output format for ACK assemblers
*/
#ifndef ushort
#define ushort unsigned short
#endif /* ushort */
struct outhead {
ushort oh_magic; /* magic number */
ushort oh_stamp; /* version stamp */
ushort oh_flags; /* several format flags */
ushort oh_nsect; /* number of outsect structures */
ushort oh_nrelo; /* number of outrelo structures */
ushort oh_nname; /* number of outname structures */
long oh_nemit; /* sum of all os_flen */
long oh_nchar; /* size of string area */
};
#define O_MAGIC 0x0201 /* magic number of output file */
#define O_STAMP 0 /* version stamp */
#define MAXSECT 64 /* Maximum number of sections */
#define HF_LINK 0x0004 /* unresolved references left */
#define HF_8086 0x0008 /* os_base specially encoded */
struct outsect {
long os_base; /* startaddress in machine */
long os_size; /* section size in machine */
long os_foff; /* startaddress in file */
long os_flen; /* section size in file */
long os_lign; /* section alignment */
};
struct outrelo {
char or_type; /* type of reference */
char or_sect; /* referencing section */
ushort or_nami; /* referenced symbol index */
long or_addr; /* referencing address */
};
struct outname {
union {
char *on_ptr; /* symbol name (in core) */
long on_off; /* symbol name (in file) */
} on_u;
#define on_mptr on_u.on_ptr
#define on_foff on_u.on_off
ushort on_type; /* symbol type */
ushort on_desc; /* debug info */
long on_valu; /* symbol value */
};
/*
* relocation type bits
*/
#define RELSZ 0x07 /* relocation length */
#define RELO1 1 /* 1 byte */
#define RELO2 2 /* 2 bytes */
#define RELO4 4 /* 4 bytes */
#define RELPC 0x08 /* pc relative */
#define RELBR 0x10 /* High order byte lowest address. */
#define RELWR 0x20 /* High order word lowest address. */
/*
* section type bits and fields
*/
#define S_TYP 0x007F /* undefined, absolute or relative */
#define S_EXT 0x0080 /* external flag */
#define S_ETC 0x7F00 /* for symbolic debug, bypassing 'as' */
/*
* S_TYP field values
*/
#define S_UND 0x0000 /* undefined item */
#define S_ABS 0x0001 /* absolute item */
#define S_MIN 0x0002 /* first user section */
#define S_MAX (S_TYP-1) /* last user section */
#define S_CRS S_TYP /* on_valu is symbol index which contains value */
/*
* S_ETC field values
*/
#define S_SCT 0x0100 /* section names */
#define S_LIN 0x0200 /* hll source line item */
#define S_FIL 0x0300 /* hll source file item */
#define S_MOD 0x0400 /* ass source file item */
#define S_COM 0x1000 /* Common name. */
#define S_STB 0xe000 /* entries with any of these bits set are
reserved for debuggers
*/
/*
* structure format strings
*/
#define SF_HEAD "22222244"
#define SF_SECT "44444"
#define SF_RELO "1124"
#define SF_NAME "4224"
/*
* structure sizes (bytes in file; add digits in SF_*)
*/
#define SZ_HEAD 20
#define SZ_SECT 20
#define SZ_RELO 8
#define SZ_NAME 12
/*
* file access macros
*/
#define BADMAGIC(x) ((x).oh_magic!=O_MAGIC)
#define OFF_SECT(x) SZ_HEAD
#define OFF_EMIT(x) (OFF_SECT(x) + ((long)(x).oh_nsect * SZ_SECT))
#define OFF_RELO(x) (OFF_EMIT(x) + (x).oh_nemit)
#define OFF_NAME(x) (OFF_RELO(x) + ((long)(x).oh_nrelo * SZ_RELO))
#define OFF_CHAR(x) (OFF_NAME(x) + ((long)(x).oh_nname * SZ_NAME))
#endif /* __OUT_H_INCLUDED */