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Annotation of GNUtools/cctools/include/mach-o/fat.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * This header file describes the structures of the file format for "fat"
        !             3:  * architecture specific file (wrapper design).  At the begining of the file
        !             4:  * there is one fat_header structure followed by a number of fat_arch
        !             5:  * structures.  For each architecture in the file, specified by a pair of
        !             6:  * cputype and cpusubtype, the fat_header describes the file offset, file
        !             7:  * size and alignment in the file of the architecture specific member.
        !             8:  * The padded bytes in the file to place each member on it's specific alignment
        !             9:  * are defined to be read as zeros and can be left as "holes" if the file system
        !            10:  * can support them as long as they read as zeros.
        !            11:  *
        !            12:  * All structures defined here are always written and read to/from disk
        !            13:  * in big-endian order.
        !            14:  */
        !            15: 
        !            16: /*
        !            17:  * <mach/machine.h> is needed here for the cpu_type_t and cpu_subtype_t types
        !            18:  * and contains the constants for the possible values of these types.
        !            19:  */
        !            20: #import <mach/machine.h>
        !            21: #import <architecture/byte_order.h>
        !            22: 
        !            23: #define FAT_MAGIC      0xcafebabe
        !            24: #define FAT_CIGAM      NXSwapLong(FAT_MAGIC)
        !            25: 
        !            26: struct fat_header {
        !            27:        unsigned long   magic;          /* FAT_MAGIC */
        !            28:        unsigned long   nfat_arch;      /* number of structs that follow */
        !            29: };
        !            30: 
        !            31: struct fat_arch {
        !            32:        cpu_type_t      cputype;        /* cpu specifier (int) */
        !            33:        cpu_subtype_t   cpusubtype;     /* machine specifier (int) */
        !            34:        unsigned long   offset;         /* file offset to this object file */
        !            35:        unsigned long   size;           /* size of this object file */
        !            36:        unsigned long   align;          /* alignment as a power of 2 */
        !            37: };
        !            38: 

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