o65.h

6502 c compiler free open source

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/*                                                                           */
/*				     o65.h				     */
/*                                                                           */
/*		      Definitions for the o65 file format		     */
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/*                                                                           */
/* (C) 2002-2005 Ullrich von Bassewitz                                       */
/*               R鰉erstrasse 52                                             */
/*               D-70794 Filderstadt                                         */
/* EMail:        [e-mail]                                                 */
/*                                                                           */
/*                                                                           */
/* This software is provided 'as-is', without any expressed or implied       */
/* warranty.  In no event will the authors be held liable for any damages    */
/* arising from the use of this software.                                    */
/*                                                                           */
/* Permission is granted to anyone to use this software for any purpose,     */
/* including commercial applications, and to alter it and redistribute it    */
/* freely, subject to the following restrictions:                            */
/*                                                                           */
/* 1. The origin of this software must not be misrepresented; you must not   */
/*    claim that you wrote the original software. If you use this software   */
/*    in a product, an acknowledgment in the product documentation would be  */
/*    appreciated but is not required.                                       */
/* 2. Altered source versions must be plainly marked as such, and must not   */
/*    be misrepresented as being the original software.                      */
/* 3. This notice may not be removed or altered from any source              */
/*    distribution.                                                          */
/*                                                                           */
/*****************************************************************************/



/* This files exports structures and constants to handle the o65 relocatable
 * file format as defined by Andre Fachat. See the original document under
 *
 *      http://www.6502.org/users/andre/o65/fileformat.html
 *
 * for more information.
 */



#ifndef _O65_H
#define _O65_H



/* o65 size type. It is 2 bytes for the 6502 and 4 bytes for the 65816 */
typedef unsigned o65_size;


/* Structure that defines the o65 file header */
typedef struct o65_header o65_header;
struct o65_header {
    char        marker[2];      /* Non-C64 marker */
    char        magic[3];       /* o65 magic */
    char        version;	/* Version number */
    unsigned    mode;           /* Mode word */
    o65_size	tbase;          /* Original text (code) segment address */
    o65_size    tlen;           /* Size of text (code) segment */
    o65_size    dbase;          /* Original data segment address */
    o65_size    dlen;           /* Size of data segment */
    o65_size    bbase;          /* Original bss segment address */
    o65_size    blen;           /* Size of bss segment */
    o65_size    zbase;          /* Original zp segment address */
    o65_size    zlen;           /* Size of zp segment */
    o65_size    stack;          /* Stacksize needed */
};



/* Marker, magic and version number */
#define O65_MARKER_0            0x01
#define O65_MARKER_1            0x00
#define O65_MAGIC_0             0x6F    /* 'o' */
#define O65_MAGIC_1             0x36    /* '6' */
#define O65_MAGIC_2             0x35    /* '5' */
#define O65_VERSION             0x00

/* Defines for the mode word */
#define O65_CPU_65816           0x8000 	/* Executable is for 65816 */
#define O65_CPU_6502            0x0000  /* Executable is for the 6502 */
#define O65_CPU_MASK            0x8000  /* Mask to extract CPU type */

#define O65_RELOC_PAGE          0x4000  /* Page wise relocation */
#define O65_RELOC_BYTE          0x0000  /* Byte wise relocation */
#define O65_RELOC_MASK          0x4000  /* Mask to extract relocation type */

#define O65_SIZE_32BIT          0x2000 	/* All size words are 32bit */
#define O65_SIZE_16BIT          0x0000  /* All size words are 16bit */
#define O65_SIZE_MASK           0x2000  /* Mask to extract size */

#define O65_FTYPE_OBJ           0x1000  /* Object file */
#define O65_FTYPE_EXE           0x0000  /* Executable file */
#define O65_FTYPE_MASK          0x1000  /* Mask to extract type */

#define O65_ADDR_SIMPLE         0x0800  /* Simple addressing */
#define O65_ADDR_DEFAULT        0x0000  /* Default addressing */
#define O65_ADDR_MASK           0x0800  /* Mask to extract addressing */

#define O65_ALIGN_1             0x0000  /* Bytewise alignment */
#define O65_ALIGN_2             0x0001  /* Align words */
#define O65_ALIGN_4             0x0002  /* Align longwords */
#define O65_ALIGN_256           0x0003  /* Align pages (256 bytes) */
#define O65_ALIGN_MASK          0x0003  /* Mask to extract alignment */

/* The mode word as generated by the ld65 linker */
#define O65_MODE_CC65           (O65_CPU_6502    |      \
                                 O65_RELOC_BYTE  |      \
                                 O65_SIZE_16BIT  |      \
                                 O65_FTYPE_EXE   |      \
                                 O65_ADDR_SIMPLE |      \
                                 O65_ALIGN_1)

/* The four o65 segment types. */
#define O65_SEGID_UNDEF  	0x00
#define O65_SEGID_ABS	        0x01
#define O65_SEGID_TEXT   	0x02
#define O65_SEGID_DATA	        0x03
#define O65_SEGID_BSS	        0x04
#define O65_SEGID_ZP 	        0x05
#define O65_SEGID_MASK          0x07

/* Relocation type codes */
#define O65_RTYPE_WORD          0x80
#define O65_RTYPE_HIGH          0x40
#define O65_RTYPE_LOW           0x20
#define O65_RTYPE_SEGADDR       0xC0
#define O65_RTYPE_SEG           0xA0
#define O65_RTYPE_MASK          0xE0

/* Segment IDs */
#define O65_SEGID_UNDEF         0x00
#define O65_SEGID_ABS           0x01
#define O65_SEGID_TEXT          0x02
#define O65_SEGID_DATA          0x03
#define O65_SEGID_BSS           0x04
#define O65_SEGID_ZP            0x05
#define O65_SEGID_MASK          0x07

/* Option tags */
#define O65_OPT_FILENAME        0
#define O65_OPT_OS     		1
#define O65_OPT_ASM		2
#define O65_OPT_AUTHOR		3
#define O65_OPT_TIMESTAMP	4

/* Operating system codes for O65_OPT_OS */
#define O65_OS_OSA65		1
#define O65_OS_LUNIX		2
#define O65_OS_CC65             3
#define O65_OS_OPENCBM          4



/* End of o65.h */
#endif