source: trunk/minix/commands/aal/out.h@ 10

/*
 * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
 * See the copyright notice in the ACK home directory, in the file "Copyright".
 */
/* $Header: /cvsup/minix/src/commands/aal/out.h,v 1.1.1.1 2005/04/21 14:53:57 beng Exp $ */

#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 */