关于linuxrc不能执行的问题

骄傲的唐

linux在2410上面启动时的打印信息

1. 
   
2. NAND read: device 0 offset 0x100000, size 0x300000
   
3. 3145728 bytes read: OK
   
4. ## Starting application at 0x30008000 ...
   
5. Uncompressing Linux.............................................................
   
6. done, booting the kernel.
   
7. Linux version 2.6.14.1 (jade@ubuntu) (gcc version 3.4.5) #2 Thu Mar 5 14:42:12 C
   
8. ST 2009
   
9. CPU: ARM920Tid(wb) [41129200] revision 0 (ARMv4T)
   
10. Machine: SMDK2410
    
11. Warning: bad configuration page, trying to continue
    
12. Memory policy: ECC disabled, Data cache writeback
    
13. CPU S3C2410A (id 0x32410002)
    
14. S3C2410: core 202.800 MHz, memory 101.400 MHz, peripheral 50.700 MHz
    
15. S3C2410 Clocks, (c) 2004 Simtec Electronics
    
16. CLOCK: Slow mode (1.500 MHz), fast, MPLL on, UPLL on
    
17. CPU0: D VIVT write-back cache
    
18. CPU0: I cache: 16384 bytes, associativity 64, 32 byte lines, 8 sets
    
19. CPU0: D cache: 16384 bytes, associativity 64, 32 byte lines, 8 sets
    
20. Built 1 zonelists
    
21. Kernel command line: noinitrd root=/dev/mtdblock2 init=/linuxrc console=ttySAC0,
    
22. 115200
    
23. irq: clearing subpending status 00000002
    
24. PID hash table entries: 128 (order: 7, 2048 bytes)
    
25. timer tcon=00500000, tcnt a509, tcfg 00000200,00000000, usec 00001e4c
    
26. Console: colour dummy device 80x30
    
27. Dentry cache hash table entries: 4096 (order: 2, 16384 bytes)
    
28. Inode-cache hash table entries: 2048 (order: 1, 8192 bytes)
    
29. Memory: 16MB = 16MB total
    
30. Memory: 14232KB available (1501K code, 342K data, 84K init)
    
31. Mount-cache hash table entries: 512
    
32. CPU: Testing write buffer coherency: ok
    
33. softlockup thread 0 started up.
    
34. NET: Registered protocol family 16
    
35. S3C2410: Initialising architecture
    
36. S3C2410 DMA Driver, (c) 2003-2004 Simtec Electronics
    
37. DMA channel 0 at c1800000, irq 33
    
38. DMA channel 1 at c1800040, irq 34
    
39. DMA channel 2 at c1800080, irq 35
    
40. DMA channel 3 at c18000c0, irq 36
    
41. NetWinder Floating Point Emulator V0.97 (double precision)
    
42. devfs: 2004-01-31 Richard Gooch ([email]rgooch@atnf.csiro.au[/email])
    
43. devfs: boot_options: 0x1
    
44. Console: switching to colour frame buffer device 80x25
    
45. fb0: Virtual frame buffer device, using 1024K of video memory
    
46. S3C2410 RTC, (c) 2004 Simtec Electronics
    
47. s3c2410_serial0 at MMIO 0x50000000 (irq = 70) is a S3C2410
    
48. s3c2410_serial1 at MMIO 0x50004000 (irq = 73) is a S3C2410
    
49. s3c2410_serial2 at MMIO 0x50008000 (irq = 76) is a S3C2410
    
50. io scheduler noop registered
    
51. io scheduler anticipatory registered
    
52. io scheduler deadline registered
    
53. io scheduler cfq registered
    
54. RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
    
55. S3C24XX NAND Driver, (c) 2004 Simtec Electronics
    
56. s3c2410-nand: mapped registers at c1980000
    
57. s3c2410-nand: timing: Tacls 10ns, Twrph0 30ns, Twrph1 10ns
    
58. NAND device: Manufacturer ID: 0xec, Chip ID: 0x76 (Samsung NAND 64MiB 3,3V 8-bit
    
59. )
    
60. NAND_ECC_NONE selected by board driver. This is not recommended !!
    
61. Scanning device for bad blocks
    
62. Creating 4 MTD partitions on "NAND 64MiB 3,3V 8-bit":
    
63. 0x00000000-0x00100000 : "bootloader"
    
64. 0x00100000-0x00400000 : "kernel"
    
65. 0x00400000-0x02c00000 : "root"
    
66. 0x02d00000-0x03c00000 : "user"
    
67. mice: PS/2 mouse device common for all mice
    
68. NET: Registered protocol family 2
    
69. IP route cache hash table entries: 256 (order: -2, 1024 bytes)
    
70. TCP established hash table entries: 1024 (order: 0, 4096 bytes)
    
71. TCP bind hash table entries: 1024 (order: 0, 4096 bytes)
    
72. TCP: Hash tables configured (established 1024 bind 1024)
    
73. TCP reno registered
    
74. TCP bic registered
    
75. NET: Registered protocol family 1
    
76. Reading data from NAND FLASH without ECC is not recommended
    
77. VFS: Mounted root (cramfs filesystem) readonly.
    
78. Mounted devfs on /dev
    
79. Freeing init memory: 84K
    
80. Failed to execute /linuxrc.  Attempting defaults...
    
81. Kernel panic - not syncing: No init found.  Try passing init= option to kernel.
    

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网上分析linuxrc不能运行无非三点原因
1 linuxrc不具备可执行属性
2 linuxrc的解释shell不在首行
3 linuxrc的解释shell不存在

1. 
   
2. ls linuxrc -al
   
3. -rwxrwxr-x 1 root root 687 1970-01-01 08:00 linuxrc
   

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说明第一条排除

root的结构

1. 
   
2. |-- bin
   
3. |   |-- ash -> busybox
   
4. |   |-- busybox
   
5. |   |-- cat -> busybox
   
6. |   |-- cp -> busybox
   
7. |   |-- echo -> busybox
   
8. |   |-- ls -> busybox
   
9. |   |-- mkdir -> busybox
   
10. |   |-- mount -> busybox
    
11. |   |-- mv -> busybox
    
12. |   |-- pwd -> busybox
    
13. |   |-- rm -> busybox
    
14. |   |-- touch -> busybox
    
15. |   |-- umount -> busybox
    
16. |   `-- vi -> busybox
    
17. |-- dev
    
18. |-- etc
    
19. |-- home
    
20. |-- lib
    
21. |-- linuxrc
    
22. |-- linuxrc~
    
23. |-- mnt
    
24. |   `-- etc
    
25. |-- proc
    
26. |-- root
    
27. |-- sbin
    
28. |   |-- halt -> ../bin/busybox
    
29. |   |-- init -> ../bin/busybox
    
30. |   |-- poweroff -> ../bin/busybox
    
31. |   |-- reboot -> ../bin/busybox
    
32. |   `-- start-stop-daemon -> ../bin/busybox
    
33. |-- sys
    
34. |-- tmp
    
35. `-- usr
    
36.     |-- bin
    
37.     |   |-- [ -> ../../bin/busybox
    
38.     |   |-- [[ -> ../../bin/busybox
    
39.     |   |-- env -> ../../bin/busybox
    
40.     |   |-- mesg -> ../../bin/busybox
    
41.     |   `-- test -> ../../bin/busybox
    
42.     |-- lib
    
43.     `-- sbin
    

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linuxrc的内容

1. 
   
2. #!/bin/sh#挂载/etc 为 ramfs, 并从/mnt/etc 下拷贝文件到/etc 目录当中
   
3. echo "mount /etc as ramfs"
   
4. /bin/mount -n -t ramfs ramfs /etc
   
5. /bin/cp -a /mnt/etc/* /etc
   
6. echo "re-create the /etc/mtab entries"
   
7. # re-create the /etc/mtab entries
   
8. /bin/mount -f -t cramfs -o remount,ro /dev/mtdblock/2 /
   
9. #mount some file system
   
10. echo "------------mount /dev/shm as tmpfs"
    
11. /bin/mount -n -t tmpfs tmpfs /dev/shm
    
12. #挂载/proc 为 proc 文件系统
    
13. echo "------------mount /proc as proc"
    
14. /bin/mount -n -t proc none /proc
    
15. #挂载/sys 为 sysfs 文件系统
    
16. echo "------------mount /sys as sysfs"
    
17. /bin/mount -n -t sysfs none /sys
    
18. exec /sbin/init
    

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我把第一行改成了#!/bin/ash也不行，因为在/bin下面没看见sh，只看见ash。
请高手解答一下这是什么原因哦。
没有装tinylog什么的，是不是嵌入式linux默认的就是root用户啊？

marsaber

/bin/bash呢？
你/bin下有哪些shell？

cat /etc/shells
ls -l /bin/*sh*

emmoblin

Kernel panic - not syncing: No init found.  Try passing init= option to kernel.
加上这个参数试试

OneThird

busybox重新编译试试呢，选择sh支持，去掉busybox自带的linuxrc支持。

骄傲的唐

原帖由 marsaber 于 2009-3-6 21:10 发表
/bin/bash呢？
你/bin下有哪些shell？

cat /etc/shells
ls -l /bin/*sh*

1. 
   
2. jade@ubuntu:~/tmp$ cat /etc/shells
   
3. # /etc/shells: valid login shells
   
4. /bin/csh
   
5. /bin/sh
   
6. /usr/bin/es
   
7. /usr/bin/ksh
   
8. /bin/ksh
   
9. /usr/bin/rc
   
10. /usr/bin/tcsh
    
11. /bin/tcsh
    
12. /usr/bin/esh
    
13. /bin/dash
    
14. /bin/bash
    
15. /bin/rbash
    
16. /usr/bin/screen
    

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1. 
   
2. jade@ubuntu:~/tmp$ ls -l /bin/*sh*
   
3. -rwxr-xr-x 1 root root 725136 2008-05-13 02:48 /bin/bash
   
4. -rwxr-xr-x 1 root root  87924 2008-06-21 00:07 /bin/dash
   
5. lrwxrwxrwx 1 root root      4 2009-03-04 22:53 /bin/rbash -> bash
   
6. lrwxrwxrwx 1 root root      4 2009-03-04 22:53 /bin/sh -> dash
   
7. lrwxrwxrwx 1 root root      4 2009-03-04 22:53 /bin/sh.distrib -> bash
   

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骄傲的唐

卡了几天了，还是没搞出来哦。郁闷