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[Didier Barvaux <didier.barvaux@xxxxxxxxxxxxxxxxxxxx>]

Hi,

> The code I replaced it with is given below.
> 	/* read the IP-ID field */
>         {
>          uint16_t temp = 0;
>          temp = packet[0];
>          temp <<= 8;
>          temp |= packet[1];   
> 	//ipv4_set_id(ip, *((uint16_t *) packet));
> 	ipv4_set_id(ip, temp);
> 	rohc_debugf(3, "IP-ID = 0x%04x\n", ntohs(ipv4_get_id(*ip)));
> 	packet += 2;
> 	read += 2;
>         }
> from below given function "d_decode_dynamic_ip4".

Thank you. Could you please compile and run the attached test program
to check if the uint16_t cast is the root of your problem ? You may
follow these steps :
 $ gcc -g -Wall -Werror -c -o test_uint16t_cast.o test_uint16t_cast.c
 $ gcc test_uint16t_cast.o -o test_uint16t_cast 
 $ ./test_uint16t_cast
 first 2 bytes = 0x0100
 last 2 bytes = 0x0302

Please report me any GCC warning. The result given by the test program
may differ from the one I get on x86 depending on the endianness of your
microcontroller.


> I have not used gdb yet on uclinux.
> 
> can you send some instructions as you said?
> It will be helpful.

I do not know how to install gdb on uclinux if it is not done yet. Use
the documentation provided by the manufacturer.

Once gdb is setup on your platform, you may follow these instructions :
 $ gdb ./test_program [optional_arguments]
 (gdb) run
 <gdb reports crash here>
 (gdb) bt

Do not forget to build you test program with "-g" so that debug
information is included in the binary.

Didier Barvaux
Viveris Technologies