interworking problem

[Nick Clifton]

Hi Aram,

>    i have gone through the a.out file after this error. 
 > that is producing full of arm instructions other than the main
> function(which is compiled for -mthumb). 
> where should i change for this corresponding error. 

It is not clear what question you are asking here.

Ian has pointed out that you should be compiling your program with the 
-mthumb-interwork switch specified on the gcc command line.

>    i have added one new add instruction in thumb mode. based on that
> i have written one sample program to emit the corresponding new 
> instruction. gcc works fine. when i assemble the function it emits 
 > correct opcode. but when i give the same function to the ld it
 > emits full of arm instructions instead of thumb instructions.
 > which routine checks for this corresponding change.

Again this is not clear.  Do you mean that when the linker is creating 
the executable that it is inserting some ARM-encoded instructions into 
the output, or that it is somehow magically transforming your 
THUMB-encoded instructions into ARM-encoded instructions ?

Perhaps it would help if you could provide a *small* example program and 
  the command lines you use to compile it, as well as description of 
what is wrong with the resulting executable.

Cheers
   Nick