linux-0.11调试教程，fdisk for linux-0.11 by chenghao0511
csdn下载：http://download.csdn.net/detail/sitelist/5065652
fdisk-by-chenghao0511 for linux-0.11
2014年1月11日更新，fdiskch，第二版，此版本可以使shoelace启动，第二可以以此制作一个把
Image放到硬盘分区前面，直接启动系统。
http://pan.baidu.com/s/13oTQ2 里面的fdiskch-inlinux.rar
百度网盘下载地址：
http://pan.baidu.com/share/link?shareid=330227&uk=453348606
2013/2/16 by chenghao0511 # gmail.com
patch to:
/fs/ioctl.c
/include/linux/hdreg.h
/kernel/blk_drv/hd.c
打补丁的目的是获得hd_info[dev]的硬盘信息，既磁头数，磁道数，扇区数。
13年12月30日更新：把
+ dev = MINOR(dev) >> 6;
改为：
+ dev = MINOR(dev) >> 2;
fdisk-0.91编译的时候应该把/dev/hda改为/dev/hd0才会正常运行，也就是不犯错。
如何给内核打补丁：
diff -rc2N linux/fs/ioctl.c extra/fs/ioctl.c
*** linux-0.95a/fs/ioctl.c Thu Feb 20 15:01:13 1992
--- linux/fs/ioctl.c Tue Mar 31 10:09:50 1992
***************
*** 11,14 ****
--- 11,15 ----
#include <linux/sched.h>
+ extern int hd_ioctl(int dev, int cmd, int arg);
extern int tty_ioctl(int dev, int cmd, int arg);
extern int pipe_ioctl(struct inode *pino, int cmd, int arg);
***************
*** 22,26 ****
NULL, /* /dev/mem */
NULL, /* /dev/fd */
! NULL, /* /dev/hd */
tty_ioctl, /* /dev/ttyx */
tty_ioctl, /* /dev/tty */
--- 23,27 ----
NULL, /* /dev/mem */
NULL, /* /dev/fd */
! hd_ioctl, /* /dev/hd */
tty_ioctl, /* /dev/ttyx */
tty_ioctl, /* /dev/tty */
diff -rc2N linux/include/linux/hdreg.h extra/include/linux/hdreg.h
*** linux-0.95a/include/linux/hdreg.h Sat Feb 1 14:04:36 1992
--- linux/include/linux/hdreg.h Sat Mar 28 19:57:00 1992
***************
*** 65,67 ****
--- 65,74 ----
};
+ #define HDIO_REQ 0x301
+ struct hd_geometry {
+ unsigned char heads;
+ unsigned char sectors;
+ unsigned short cylinders;
+ };
+
#endif
diff -rc2N linux/kernel/blk_drv/hd.c extra/kernel/blk_drv/hd.c
*** linux-0.95a/kernel/blk_drv/hd.c Tue Mar 31 09:57:31 1992
--- linux/kernel/blk_drv/hd.c Wed Mar 25 08:56:24 1992
***************
*** 26,29 ****
--- 26,30 ----
#include <asm/io.h>
#include <asm/segment.h>
+ #include <errno.h>
#define MAJOR_NR 3
***************
*** 431,433 ****
--- 511,537 ----
outb(inb_p(0xA1)&0xbf,0xA1);
timer_table[HD_TIMER].fn = hd_times_out;
+ }
+
+ int hd_ioctl(int dev, int cmd, int arg)
+ {
+ struct hd_geometry *loc = (void *) arg;
+
+ if (!loc)
+ return -EINVAL;
+ dev = MINOR(dev) >> 6;
+ if (dev >= NR_HD)
+ return -EINVAL;
+
+ switch (cmd) {
+ case HDIO_REQ:
+ put_fs_byte(hd_info[dev].head,
+ (unsigned char *) &loc->heads);
+ put_fs_byte(hd_info[dev].sect,
+ (unsigned char *) &loc->sectors);
+ put_fs_word(hd_info[dev].cyl,
+ (unsigned short *) &loc->cylinders);
+ return 0;
+ default:
+ return -EINVAL;
+ }
}