/

The C code for a grub4dos executable may have defines as follows:

用于编写外部命令的函数定义。

/

#ifndef GRUB4DOS20100301

#define GRUB4DOS20100301

int grubmain (char arg,int flags);

#undef NULL

#define NULL         ((void ) 0)

/ Error codes (descriptions are in common.c) /

typedef enum

{

  ERRNONE = 0,

  ERRBADFILENAME,

  ERRBADFILETYPE,

  ERRBADGZIPDATA,

  ERRBADGZIPHEADER,

  ERRBADPARTTABLE,

  ERRBADVERSION,

  ERRBELOW1MB,

  ERRBOOTCOMMAND,

  ERRBOOTFAILURE,

  ERRBOOTFEATURES,

  ERRDEVFORMAT,

  ERRDEVVALUES,

  ERREXECFORMAT,

  ERRFILELENGTH,

  ERRFILENOTFOUND,

  ERRFSYSCORRUPT,

  ERRFSYSMOUNT,

  ERRGEOM,

  ERRNEEDLXKERNEL,

  ERRNEEDMBKERNEL,

  ERRNODISK,

  ERRNOPART,

  ERRNUMBERPARSING,

  ERROUTSIDEPART,

  ERRREAD,

  ERRSYMLINKLOOP,

  ERRUNRECOGNIZED,

  ERRWONTFIT,

  ERR_WRITE,

  ERR_BAD_ARGUMENT,

  ERR_UNALIGNED,

  ERR_PRIVILEGED,

  ERR_DEV_NEED_INIT,

  ERR_NO_DISK_SPACE,

  ERR_NUMBER_OVERFLOW,

  ERR_DEFAULT_FILE,

  ERR_DEL_MEM_DRIVE,

  ERR_DISABLE_A20,

  ERR_DOS_BACKUP,

  ERR_ENABLE_A20,

  ERR_EXTENDED_PARTITION,

  ERR_FILENAME_FORMAT,

  ERR_HD_VOL_START_0,

  ERR_INT13_ON_HOOK,

  ERR_INT13_OFF_HOOK,

  ERR_INVALID_BOOT_CS,

  ERR_INVALID_BOOT_IP,

  ERR_INVALID_FLOPPIES,

  ERR_INVALID_HARDDRIVES,

  ERR_INVALID_HEADS,

  ERR_INVALID_LOAD_LENGTH,

  ERR_INVALID_LOAD_OFFSET,

  ERR_INVALID_LOAD_SEGMENT,

  ERR_INVALID_SECTORS,

  ERR_INVALID_SKIP_LENGTH,

  ERR_INVALID_RAM_DRIVE,

  ERR_IN_SITU_FLOPPY,

  ERR_IN_SITU_MEM,

  ERR_MD_BASE,

  ERR_NON_CONTIGUOUS,

  ERR_NO_DRIVE_MAPPED,

  ERR_NO_HEADS,

  ERR_NO_SECTORS,

  ERR_PARTITION_TABLE_FULL,

  ERR_RD_BASE,

  ERR_SPECIFY_GEOM,

  ERR_SPECIFY_MEM,

  ERR_SPECIFY_RESTRICTION,

//  ERR_INVALID_RD_BASE,

//  ERR_INVALID_RD_SIZE,

  ERR_MD5_FORMAT,

  ERR_WRITE_GZIP_FILE,

  ERR_FUNC_CALL,

//  ERR_WRITE_TO_NON_MEM_DRIVE,

  ERR_INTERNAL_CHECK,

  MAX_ERR_NUM

} grub_error_t;

#define install_partition ((unsigned long )0x8208)

#define boot_drive ((unsigned long )0x8280)

#define pxe_yip ((unsigned long )0x8284)

#define pxe_sip ((unsigned long )0x8288)

#define pxe_gip ((unsigned long )0x828C)

#define filesize ((unsigned long long )0x8290)

#define saved_mem_upper ((unsigned long )0x8298)

#define saved_partition ((unsigned long )0x829C)

#define saved_drive ((unsigned long )0x82A0)

#define no_decompression ((unsigned long )0x82A4)

#define part_start ((unsigned long long )0x82A8)

#define part_length ((unsigned long long )0x82B0)

#define fb_status ((unsigned long )0x82B8)

#define is64bit ((unsigned long )0x82BC)

#define saved_mem_higher ((unsigned long long )0x82C0)

#define cdrom_drive ((unsigned long )0x82C8)

#define ram_drive ((unsigned long )0x82CC)

#define rd_base ((unsigned long long )0x82D0)

#define rd_size ((unsigned long long )0x82D8)

#define addr_system_functions ((unsigned long )0x8300)

#define next_partition_drive        (((unsigned long **)0x8304)[0])

#define next_partition_dest        (((unsigned long )0x8304)[1])

#define next_partition_partition    (((unsigned long )0x8304)[2])

#define next_partition_type        (((unsigned long **)0x8304)[3])

#define next_partition_start        (((unsigned long **)0x8304)[4])

#define next_partition_len        (((unsigned long **)0x8304)[5])

#define next_partition_offset        (((unsigned long **)0x8304)[6])

#define next_partition_entry        (((unsigned long **)0x8304)[7])

#define next_partition_ext_offset    (((unsigned long **)0x8304)[8])

#define next_partition_buf        (((char **)0x8304)[9])

#define quit_print        (((int **)0x8304)[10])

//#define buf_drive    (((int )0x8304)[11])

//#define buf_track    ((*(int )0x8304)[12])

#define filesystem_type (((int **)0x8304)[13])

//#define query_block_entries (((long )0x8304)[14])

//#define map_start_sector ((*(unsigned long )0x8304)[15])

#define buf_geom (((struct geometry **)0x8304)[16])

#define tmp_geom (((struct geometry **)0x8304)[17])

#define term_table (((struct term_entry **)0x8304)[18])

#define current_term (((struct term_entry **)0x8304)[19])

#define fsys_table (((struct fsys_entry **)0x8304)[20])

//#define fsys_type (((int **)0x8304)[21])

//#define NUM_FSYS (((const int )0x8304)[22])

#define graphics_inited ((*(const int )0x8304)[23])

#define VARIABLE_GRAPHICS ((char )((int )0x8304)[24])

#define font8x16 ((unsigned char )((int )0x8304)[25])

#define fontx (((int **)0x8304)[26])

#define fonty (((int )0x8304)[27])

#define graphics_CURSOR ((*(int )0x8304)[28])

#define menu_broder (((struct broder **)0x8304)[29])

#define cursorX ((short )(VARIABLE_GRAPHICS))

#define cursorY ((short )(VARIABLE_GRAPHICS + 2))

#define cursorBuf ((char )(VARIABLE_GRAPHICS + 6))

#define free_mem_start ((unsigned long )0x82F0)

#define free_mem_end ((unsigned long )0x82F4)

#define saved_mmap_addr ((unsigned long )0x82F8)

#define saved_mmap_length ((unsigned long )0x82FB)

#define DRIVE_MAP_SIZE    8

#define PXE_DRIVE        0x21

#define INITRD_DRIVE    0x22

#define FB_DRIVE        0x23

#define SECTOR_SIZE        0x200

#define SECTOR_BITS        9

#define BIOSDISK_FLAG_BIFURCATE        0x4

#define MB_ARD_MEMORY    1

#define MB_INFO_MEM_MAP    0x00000040

#define errnum ((grub_error_t )0x8314)

#define current_drive ((unsigned long )0x8318)

#define current_partition ((unsigned long )0x831C)

#define filemax ((unsigned long long )0x8320)

#define filepos ((unsigned long long )0x8328)

#define debug ((int )0x8330)

#define current_slice ((unsigned long )0x8334)

#define GRUB_READ 0xedde0d90

#define GRUB_WRITE 0x900ddeed

#define sprintf ((int ()(char , const char , …))(((int *)0x8300)[0]))

#define printf(…) sprintf(NULL, __VA_ARGS)

#define putstr ((void ()(const char ))(((int **)0x8300)[1]))

#define putchar ((void ()(int))(((int **)0x8300)[2]))

#define get_cmdline ((int ()(struct get_cmdline_arg))(((int **)0x8300)[3]))

#define getxy ((int ()(void))(((int **)0x8300)[4]))

#define gotoxy ((void ()(int, int))(((int **)0x8300)[5]))

#define cls ((void ()(void))(((int **)0x8300)[6]))

#define setcursor ((int ()(int))(((int **)0x8300)[7]))

#define nul_terminate ((int ()(char ))(((int )0x8300)[8]))

#define safe_parse_maxint_with_suffix ((int (*)(char str_ptr, unsigned long long myint_ptr, int unitshift))(((int )0x8300)[9]))

#define safe_parse_maxint(str_ptr, myint_ptr) safe_parse_maxint_with_suffix(str_ptr, myint_ptr, 0)

#define substring ((int ()(const char s1, const char s2, int case_insensitive))(((int )0x8300)[10]))

#define strstr ((char ()(const char s1, const char s2))(((int **)0x8300)[11]))

#define strlen ((int ()(const char str))(((int )0x8300)[12]))

#define strtok ((char ()(char s, const char delim))((*(int )0x8300)[13]))

#define strncat ((int ()(char s1, const char s2, int n))(((int )0x8300)[14]))

#define strcmp ((int ()(const char s1, const char s2))(((int )0x8300)[15]))

#define strcpy ((char ()(char dest, const char src))(((int **)0x8300)[16]))

#define tolower ((int ()(int))(((int **)0x8300)[17]))

#define isspace ((int ()(int))(((int **)0x8300)[18]))

#define getkey ((int ()(void))(((int **)0x8300)[19]))

#define checkkey ((int ()(void))(((int **)0x8300)[20]))

#define sleep ((unsigned int ()(unsigned int))(((int **)0x8300)[21]))

#define memcmp ((int ()(const char s1, const char s2, int n))(((int **)0x8300)[22]))

#define memmove ((void ()(void to, const void from, int len))(((int )0x8300)[23]))

#define memset ((void ()(void start, int c, int len))(((int )0x8300)[24]))

#define mem64 ((int ()(int, unsigned long long, unsigned long long, unsigned long long))(((int )0x8300)[25]))

#define open ((int ()(char ))((*(int )0x8300)[26]))

#define read ((unsigned long long ()(unsigned long long, unsigned long long, unsigned long))(((int )0x8300)[27]))

#define close ((void ()(void))(((int )0x8300)[28]))

#define unicode_to_utf8 ((void ()(unsigned short , unsigned char , unsigned long))(((int )0x8300)[29]))

/

int

rawread (unsigned long drive, unsigned long sector, unsigned long byte_offset, unsigned long byte_len, unsigned long long buf, unsigned long write)

/

#define rawread ((int ()(unsigned long, unsigned long, unsigned long, unsigned long long, unsigned long long, unsigned long))(((int )0x8300)[30]))

/

int

rawwrite (unsigned long drive, unsigned long sector, char buf)

/

#define rawwrite ((int ()(unsigned long, unsigned long, char ))(((int )0x8300)[31]))

/

int

devread (unsigned long drive, unsigned long sector, unsigned long byte_offset, unsigned long long byte_len, unsigned long long buf, unsigned long write)

/

#define devread ((int ()(unsigned long sector, unsigned long byte_offset, unsigned long long byte_len, unsigned long long buf, unsigned long write))(((int )0x8300)[32]))

/

int

devwrite (unsigned long sector, unsigned long sector_count, char buf)

/

#define devwrite ((int ()(unsigned long, unsigned long, char ))(((int )0x8300)[33]))

#define next_partition ((int ()(void))(((int )0x8300)[34]))

#define open_device ((int ()(void))(((int )0x8300)[35]))

#define real_open_partition ((int ()(int))(((int )0x8300)[36]))

#define set_device ((char ()(char ))(((int )0x8300)[37]))

#define dir ((int ()(char ))((*(int )0x8300)[38]))

#define print_a_completion ((void ()(char ))(((int **)0x8300)[39]))

#define print_completions ((int ()(int, int))(((int **)0x8300)[40]))

#define parse_string ((int ()(char ))(((int )0x8300)[41]))

#define hexdump ((void ()(unsigned long, char , int))((*(int )0x8300)[42]))

#define skip_to ((char ()(int after_equal, char cmdline))(((int )0x8300)[43]))

#define builtin_cmd ((int ()(char cmd, char arg, int flags))(((int )0x8300)[44]))

#define get_datetime ((void ()(unsigned long date, unsigned long time))(((int )0x8300)[45]))

#define lba_to_chs ((void ()(unsigned long lba, unsigned long cl, unsigned long ch, unsigned long dh))((*(int )0x8300)[46]))

#define probe_bpb ((int ()(struct master_and_dos_boot_sector BS))(((int **)0x8300)[47]))

#define probe_mbr ((int ()(struct master_and_dos_boot_sector BS, unsigned long start_sector1, unsigned long sector_count1, unsigned long part_start1))(((int )0x8300)[48]))

#define graphics_get_font ((unsigned char ()(void))((*(int )0x8300)[51]))

#define RAW_ADDR(x) (x)

#define SCRATCHADDR  RAW_ADDR (0x37e00)

#define MBR ((char )0x8000)

//#define grub_memcmp memcmp

struct get_cmdline_arg

{

    char cmdline;

    char *prompt;

    int maxlen;

    int echo_char;

    int readline;

} __attribute ((packed));

struct geometry

{

  / The number of cylinders /

  unsigned long cylinders;

  / The number of heads /

  unsigned long heads;

  / The number of sectors /

  unsigned long sectors;

  / The total number of sectors /

  unsigned long long total_sectors;

  / Device sector size /

  unsigned long sector_size;

  / Flags /

  unsigned long flags;

};

/ fsys.h /

struct fsys_entry

{

  char name;

  int (mount_func) (void);

  unsigned long (read_func) (unsigned long long buf, unsigned long long len, unsigned long write);

  int (dir_func) (char dirname);

  void (close_func) (void);

  unsigned long (embed_func) (unsigned long start_sector, unsigned long needed_sectors);

};

/ fsys.h /

/ shared.h /

struct master_and_dos_boot_sector {

/ 00 / char dummy1[0x0b]; / at offset 0, normally there is a short JMP instuction(opcode is 0xEB) /

/ 0B / unsigned short bytes_per_sector __attribute ((packed));/ seems always to be 512, so we just use 512 /

/ 0D / unsigned char sectors_per_cluster;/ non-zero, the power of 2, i.e., 2^n /

/ 0E / unsigned short reserved_sectors __attribute ((packed));/ FAT=non-zero, NTFS=0? /

/ 10 / unsigned char number_of_fats;/ NTFS=0; FAT=1 or 2  /

/ 11 / unsigned short root_dir_entries __attribute ((packed));/ FAT32=0, NTFS=0, FAT12/16=non-zero /

/ 13 / unsigned short total_sectors_short __attribute ((packed));/ FAT32=0, NTFS=0, FAT12/16=any /

/ 15 / unsigned char media_descriptor;/ range from 0xf0 to 0xff /

/ 16 / unsigned short sectors_per_fat __attribute ((packed));/ FAT32=0, NTFS=0, FAT12/16=non-zero /

/ 18 / unsigned short sectors_per_track __attribute ((packed));/ range from 1 to 63 /

/ 1A / unsigned short total_heads __attribute ((packed));/ range from 1 to 256 /

/ 1C / unsigned long hidden_sectors __attribute ((packed));/ any value /

/ 20 / unsigned long total_sectors_long __attribute ((packed));/ FAT32=non-zero, NTFS=0, FAT12/16=any /

/ 24 / unsigned long sectors_per_fat32 __attribute ((packed));/ FAT32=non-zero, NTFS=any, FAT12/16=any /

/ 28 / unsigned long long total_sectors_long_long __attribute ((packed));/ NTFS=non-zero, FAT12/16/32=any /

/ 30 / char dummy2[0x18e];

    / Partition Table, starting at offset 0x1BE /

/ 1BE / struct {

    / +00 / unsigned char boot_indicator;

    / +01 / unsigned char start_head;

    / +02 / unsigned short start_sector_cylinder __attribute ((packed));

    / +04 / unsigned char system_indicator;

    / +05 / unsigned char end_head;

    / +06 / unsigned short end_sector_cylinder __attribute ((packed));

    / +08 / unsigned long start_lba __attribute ((packed));

    / +0C / unsigned long total_sectors __attribute ((packed));

    / +10 /

    } P[4];

/ 1FE / unsigned short boot_signature __attribute ((packed));/ 0xAA55 /

#if 0

     / This starts at offset 0x200 /

/ 200 / unsigned long probed_total_sectors __attribute ((packed));

/ 204 / unsigned long probed_heads __attribute ((packed));

/ 208 / unsigned long probed_sectors_per_track __attribute ((packed));

/ 20C / unsigned long probed_cylinders __attribute ((packed));

/ 210 / unsigned long sectors_per_cylinder __attribute ((packed));

/ 214 / char dummy3[0x0c] __attribute ((packed));

    / matrix of coefficients of linear equations

    

        C[n] (H_count S_count) + H[n] S_count = LBA[n] - S[n] + 1

    

     where n = 1, 2, 3, 4, 5, 6, 7, 8

     /

     / This starts at offset 0x130 /

/ 220 */ long long L[9] __attribute ((packed)); / L[n] == LBA[n] - S[n] + 1 /

/ 268 / long H[9] __attribute ((packed));

/ 28C / short C[9] __attribute ((packed));

/ 29E / short X __attribute ((packed));

/ 2A0 / short Y __attribute ((packed));

/ 2A2 / short Cmax __attribute ((packed));

/ 2A4 / long Hmax __attribute ((packed));

/ 2A8 / unsigned long Z __attribute ((packed));

/ 2AC / short Smax __attribute ((packed));

/ 2AE /

#endif

  };

struct drive_map_slot

{

    / Remember to update DRIVE_MAP_SLOT_SIZE once this is modified.

     The struct size must be a multiple of 4.

     /

      / X=max_sector bit 7: read only or fake write /

      / Y=to_sector  bit 6: safe boot or fake write /

      / —————————————————————- /

      / X Y: meaning of restrictions imposed on map /

      / —————————————————————- /

      / 1 1: read only=0, fake write=1, safe boot=0 /

      / 1 0: read only=1, fake write=0, safe boot=0 /

      / 0 1: read only=0, fake write=0, safe boot=1 /

      / 0 0: read only=0, fake write=0, safe boot=0 /

    unsigned char from_drive;

    unsigned char to_drive;        / 0xFF indicates a memdrive /

    unsigned char max_head;

    unsigned char max_sector;    / bit 7: read only /

                    / bit 6: disable lba /

    unsigned short to_cylinder;    / max cylinder of the TO drive /

                    / bit 15:  TO  drive support LBA /

                    / bit 14:  TO  drive is CDROM(with big 2048-byte sector) /

                    / bit 13: FROM drive is CDROM(with big 2048-byte sector) /

    unsigned char to_head;        / max head of the TO drive /

    unsigned char to_sector;    / max sector of the TO drive /

                    / bit 7: in-situ /

                    / bit 6: fake-write or safe-boot /

    unsigned long long start_sector;

    //unsigned long start_sector_hi;    / hi dword of the 64-bit value /

    unsigned long long sector_count;

    //unsigned long sector_count_hi;    / hi dword of the 64-bit value /

};

/ shared.h /

typedef enum

{

    COLOR_STATE_STANDARD,

    / represents the user defined colors for normal text /

    COLOR_STATE_NORMAL,

    / represents the user defined colors for highlighted text /

    COLOR_STATE_HIGHLIGHT,

    / represents the user defined colors for help text /

    COLOR_STATE_HELPTEXT,

    / represents the user defined colors for heading line /

    COLOR_STATE_HEADING

} color_state;

struct term_entry

{

  / The name of a terminal.  /

  const char name;

  / The feature flags defined above.  /

  unsigned long flags;

  / Default for maximum number of lines if not specified /

  unsigned short max_lines;

  / Put a character.  /

  void (PUTCHAR) (int c);

  / Check if any input character is available.  /

  int (CHECKKEY) (void);

  / Get a character.  /

  int (GETKEY) (void);

  / Get the cursor position. The return value is ((X << 8) | Y).  /

  int (GETXY) (void);

  / Go to the position (X, Y).  /

  void (GOTOXY) (int x, int y);

  / Clear the screen.  /

  void (CLS) (void);

  / Set the current color to be used /

  void (SETCOLORSTATE) (color_state state);

  / Set the normal color and the highlight color. The format of each

     color is VGA's.  /

  void (SETCOLOR) (int normal_color, int highlight_color, int helptext_color, int heading_color);

  / Turn on/off the cursor.  /

  int (SETCURSOR) (int on);

  / function to start a terminal /

  int (STARTUP) (void);

  / function to use to shutdown a terminal /

  void (*SHUTDOWN) (void);

};

#endif