Dear DavidM,
Thank you for your suggestion. Now I am successully mount the romfs. There
is a new problem: exec the /bin/init
Seems the program run to strange address after entering do_rc() function.
I have search the previous discussion:"[uClinux-dev] Re: [uClinux-dev]
problem of execve("/bin/init"...)
http://mailman.uclinux.org/pipermail/uclinux-dev/2003-January/014303.html";
In that discussion you suggest to prevent the usage of 'setjmp'.
I found there is the setjmp in the sh1.c of '/bin/sh' source on romfs. There
is a coment "Bruce Evans' fix". How do I fix the problem?
Another question, I have add some low level HW control code in the
drivers/char/vt.c, thus I can see any message from printk during kernel
booting. but the "printf" seems not working in the program on user land. I
have insert the printf in the /bin/init, I will insert printf in the sh.c
later. Should I set some kernel feature to support the printf working on the
virtual console?
I am using the uClinux kernel 2.6.x, the original package
released on 20080808.
Thank you very much.
Drag
2008/10/15 David McCullough <[EMAIL PROTECTED]>
>
> Jivin Yuan-Lung Li lays it down ...
> > Sorry for updaing the booting message:
>
> Looks close, couple of things below.
>
> > <4>Built 1 zonelists in Zone order, mobility grouping on. Total pages:
> 8128
> > <5>Kernel command line: root=/dev/ram0 rw
>
> You can't mount romfs "rw"
>
> > [EMAIL PROTECTED],2M keepinitrd nocache
>
> You may want to add rootfstype=romfs
>
> > <4>PID hash table entries: 128 (order: 7, 512 bytes)
> > <4>Console: colour dummy device 80x30
> > <6>console [tty0] enabled
> > <6>Dentry cache hash table entries: 4096 (order: 2, 16384 bytes)
> > <6>Inode-cache hash table entries: 2048 (order: 1, 8192 bytes)
> > <6>Memory: 32MB = 32MB total
> > <5>Memory: 29376KB available (852K code, 133K data, 68K init)
> > <7>Calibrating delay loop... 49.86 BogoMIPS (lpj=249344)
> > <4>Mount-cache hash table entries: 512
> > <6>checking if image is initramfs...it isn't (bad gzip magic numbers);
> looks
> > like an initrd
> > <4>NetWinder Floating Point Emulator V0.97 (double precision)
> > <4>fuse init (API version 7.9)
> > <6>io scheduler noop registered
> > <6>io scheduler anticipatory registered
> > <6>io scheduler deadline registered
> > <6>io scheduler cfq registered (default)
> > <6>brd: module loaded
> > <5>RAMDISK: romfs filesystem found at block 0
> > <5>RAMDISK: Loading 801KiB [1 disk] into ram disk...
> > | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ |
> / - \ | / - \ | / - \ | / - done.
> > <4>List of all partitions:
> > <4>0100 4096 ram0 (driver?)
> > <4>0101 4096 ram1 (driver?)
> > <4>0102 4096 ram2 (driver?)
> > <4>0103 4096 ram3 (driver?)
> > <4>0104 4096 ram4 (driver?)
> > <4>0105 4096 ram5 (driver?)
> > <4>0106 4096 ram6 (driver?)
> > <4>0107 4096 ram7 (driver?)
> > <4>0108 4096 ram8 (driver?)
> > <4>0109 4096 ram9 (driver?)
> > <4>010a 4096 ram10 (driver?)
> > <4>010b 4096 ram11 (driver?)
> > <4>010c 4096 ram12 (driver?)
> > <4>010d 4096 ram13 (driver?)
> > <4>010e 4096 ram14 (driver?)
> > <4>010f 4096 ram15 (driver?)
> > <4>No filesystem could mount root, tried: fuseblk
>
> What filesystems do you have compiled into your kernel ?
>
> Cheers,
> Davidm
>
> > <0>Kernel panic - not syncing: VFS: Unable to mount root fs on
> > unknown-block(1,0)
> >
> >
> > 2008/10/14 Yuan-Lung Li <[EMAIL PROTECTED]>
> >
> > > Dear all,
> > > I am implementing a virtual platform for running the uClinux. After
> > > compiling, I put the Image in the virtual ram address 0x4008000 and
> boot.rom
> > > put into the 0x4200000.
> > > The default kernel command line:
> > > root=/dev/ram0 rw [EMAIL PROTECTED] initrd=0x4200000,2M keepinitrd
> nocache
> > >
> > > The booting message is below(partially):
> > >
> > > <4>Built 1 zonelists in Zone order, mobility grouping on. Total pages:
> > > 8128
> > > <5>Kernel command line: root=/dev/ram0 rw [EMAIL PROTECTED],2M
> keepinitrd nocache
> > > <4>PID hash table entries: 128 (order: 7, 512 bytes)
> > > <4>Console: colour dummy device 80x30
> > > <6>console [tty0] enabled
> > > <6>Dentry cache hash table entries: 4096 (order: 2, 16384 bytes)
> > > <6>Inode-cache hash table entries: 2048 (order: 1, 8192 bytes)
> > > <6>Memory: 32MB = 32MB total
> > > <5>Memory: 29376KB available (852K code, 133K data, 68K init)
> > > <7>Calibrating delay loop... 49.86 BogoMIPS (lpj=249344)
> > > <4>Mount-cache hash table entries: 512
> > > <6>checking if image is initramfs...it isn't (bad gzip magic numbers);
> > > looks like an initrd
> > > Did I make any mistake? Seems the boot.rom need to be compressed. Or
> the
> > > initramfs is not content of boot.rom?
> > > Thanks.
> > >
> > > Drag
> > >
>
> > _______________________________________________
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>
> --
> David McCullough, [EMAIL PROTECTED], Ph:+61
> 734352815
> Secure Computing - SnapGear http://www.uCdot.org <http://www.ucdot.org/>
> http://www.snapgear.com
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