MyOpenRouter

Kong · September 15, 2011 7:37 AM

September 15, 2011 7:37 AM

Did you use dd-wrts current toolchain?

Kernel config says:

CONFIG_MIPS_FPU_EMU is not set

So the toolchain dd-wrt guys use should work, or the toolchain hasn't been updated. If you already created the toolchain for openwrt build you could patch a few headers and then use your own toolchain.

Tathagata Das · September 15, 2011 8:08 AM

September 15, 2011 8:08 AM

I am using OpenWrt-SDK-atheros-2.6-for-Linux-i686_32.tar.bz2 as toolchain.
This same toolchain I used to compile Tomato distribution.

In kernel configuration CONFIG_MIPS_FPU_EMU is not set and in router Makefile I have given '-msoft-float' in CFLAGS.

Kong · September 15, 2011 10:33 AM

September 15, 2011 10:33 AM

That is most likely the problem, your toolchain wasn't compiled with software floating point support, see uclibc config:

#define UCLIBC_HAS_SOFT_FLOAT 1

Tathagata Das · September 15, 2011 11:56 AM

September 15, 2011 11:56 AM updated: September 15, 2011 11:57 AM

But I used same toolchain in Tomato distribution. How is Tomato running without any issue ? Moreover this is built-in toolchain. I did not compile it, I am using binaries only.
Do you have toolchain of DD-WRT for mips big endian ?

Kong · September 15, 2011 2:23 PM

September 15, 2011 2:23 PM

You need to use dd-wrts toolchain:

ftp://ftp.dd-wrt.com/others/sourcecode/toolchains/

or compile your own toolchain, by downloading OpenWRT toolkit and select create toolchain. After that you need to patch a few includes e.g. if.h, since dd-wrt extendeds network interface structures for some special tasks.

So even if you could compile and boot dd-wrt lots of things would be broken and not working.

For mipsel I use my own toolchain since the current linaro toolchain dd-wrt uses has a buggy uclibc.

Tathagata Das · September 15, 2011 11:36 PM

September 15, 2011 11:36 PM

It may happen that DD-WRT requires some modification in the toolchain.
I will download the toolchain from the link you gave and try to compile my code using that toolchain.

Tathagata Das · September 19, 2011 1:39 AM

September 19, 2011 1:39 AM

I downloaded the toolchain but unable to run built-in executable because those are 64-bit and my machine is 32-bit.
So I am planning to compile the toolchain for my machine. Is there any guideline to do that ?

Tathagata Das · September 21, 2011 8:40 PM

September 21, 2011 8:40 PM

I used 64-bit machine but was getting same FPU problem. Then I enabled FPU in kernel configuration, so no more such error. However I am now getting same old problem of permission denied.
The problem is that the permission of the executable are not same in "src/router/mips-uclibc/target" directory in build system (Linux PC) and in board. The permission of the executable are "?-w---x--x" in the board while in target directory in PC the permissions are "-rwxr-xr-x". As a result shell is showing error message "permission denied" whenever I am trying to execute any executable(except built-in commands) in the board (by system() or manually).
Any idea ?

Kong · September 22, 2011 2:58 AM

September 22, 2011 2:58 AM

I actually tested yesterday if permissions get changed when creating the firmware.
But it exactly keeps the permissions as they have been set in the target dir.

So it must be a problem at runtime, thus returning incorrect permissions, first guess is that the libs included in the firmware don't match the ones from your toolchain.
To test this modify the makefile and copy the libs from your toolchain to the target dir e.g. :

cp -f <yourtoolchains_lib_dir/ld-uClibc-0.9.31.so $(TARGETDIR)/lib/ld-uClibc.so.0

do this for all libs that are currently in your target dir. Make sure you add the copy commands after the makefile copied it's file to the target dir.

Tathagata Das · September 22, 2011 5:14 AM

September 22, 2011 5:14 AM

I copied all libraries from my toolchain to target without any success. I have noticed that size of my libraries in the board are totally different that what I have in target directory.
Also size and permission of all libraries in board are same. Permission sets are
?r--r--rwx.

I am doing following steps in order to compile the code.
1. cd dd-wrt/src
2. make clean
3. make

I am using router/Makefile.pb42

Kong · September 22, 2011 6:05 AM

September 22, 2011 6:05 AM

Hmm haven't tried it this way. I compile using:

cd ~/DD-WRT/src/router
make -f Makefile.brcm26 clean all install

But I don't think this is the problem, but rather the mksquashfs you use. I just checked the make file for pb.42. By default it uses the mksquashfs from kernel dir, which was compiled on a 64Bit machine, so you need to use a 64Bit machine or compile it yourself.

However, in the pb42 makefile there are also some exceptions, some routers seem to need a different mksquashfs. When you boot openwrt does it also report:

squashfs: version 3.0

Tathagata Das · September 22, 2011 7:18 AM

September 22, 2011 7:18 AM

What are possible reason for this "permission denied" error ?
I am now using 64-bit machine and mksquashfs-lzma was also compiled for 64bit. I never use only 'mksquashfs' in order to prepare the firmware.

Tathagata Das · September 22, 2011 7:32 AM

September 22, 2011 7:32 AM

Also I have to remove relink-lib.sh and copy of lib/pics from Makefile as there is no such file in the distribution.

Kong · September 22, 2011 7:32 AM

September 22, 2011 7:32 AM updated: September 22, 2011 7:38 AM

The relink script just removes functions from the libs which are not used by any software in the target dir. It does not cause this.

Maybe due to the wrong squashfs on the board the bitmask returned by the fs is interpreted wrong by the function that calculates the permissions.

The makefile has some extra logic and a mksquashfs-lzma for WNDR3700 for example

Tathagata Das · September 22, 2011 7:43 AM

September 22, 2011 7:43 AM

Can you please show the place where the makefile has some extra logic ?
I am also not able to find out wndr3700 related tool in the source code.

Kong · September 22, 2011 8:07 AM

September 22, 2011 8:07 AM

Starting in line 704:

http://svn.dd-wrt.com:8000/browser//src/router/Makefile.pb42

I haven't looked at the netgear src package, maybe they have it from this package.

Kong · September 22, 2011 8:26 AM

September 22, 2011 8:26 AM

By the way, did you try the Mod-Firmware Kit and extract the image?
Not sure if that kit works for this image but it would be worth a try and that way you could check what the permissions are after extraction:

http://bitsum.com/firmware_mod_kit.htm

Tathagata Das · September 22, 2011 9:06 AM

September 22, 2011 9:06 AM

Kong said: Starting in line 704: http://svn.dd-wrt.com:8000/browser//src/router/Makefile.pb42 I haven't looked at the netgear src package, maybe they have it from this package.

Where can I find that package ?

Kong · September 22, 2011 10:05 AM

September 22, 2011 10:05 AM

I just got the src packages from:

ftp://downloads.netgear.com/files/GPL/

and included in WNDR3800-V1.0.0.18_gpl_src/include/ there is a image.mk it shows how the image is generated.

Tathagata Das · September 22, 2011 10:29 AM

September 22, 2011 10:29 AM

Actually I also followed exactly those steps to prepare the firmware. It is working on OpenWRT and Tomato but not in case of DD-WRT. However I guess DD-WRT distribution should contain some tools to compile the code for WNDR3700/v2. But I am being unable to find them.

Kong · September 22, 2011 1:57 PM

September 22, 2011 1:57 PM updated: September 22, 2011 2:00 PM

I did not find them either, but it should be fairly easy to use the openwrt make to create them and them make sure, the parameters are the same as under openwrt.

Does the wndr3800 have a serial header with/without pins for a USB TTL adapter, just like the WNR3500L?

If I get my hands on one of these I'd love to create a build for it, 16MB Flash and the 680Mhz are tempting. And te best thing about, OSS drivers in order to completely debug and profile the code.

Tathagata Das · September 27, 2011 2:15 AM

September 27, 2011 2:15 AM

I solved the problem by compiling the code as root and copy all libraries from toolchain lib.
Now I am trying to run wireless driver (ath9k) and it requires to have compat_firmware_class.ko and compat.ko. But I cannot find them. However they are available in OpenWRT distribution. Do you know how to compile compat-wirless in dd-wrt and where to get that code for DD-WRT ?

MyOpenRouter

DD-WRT FPU problem

Tathagata Das

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