[ECOS] calling function in different .S file problem.

[Qiang Huang]

Hi all:
   I have wrote two assembly file: a.S and b.S  and c.c

In b.S file:
   .global function_a
function_a:
	xxxx
	mov xxx
                add xxx
                 xxx


in c.c file
void c_function(void)
{
     // do something here
}


in a.S file:
   Get_Address function_a   ; get the address of function_a into a register
r0
   call r0   ; try to call function_a defined in b.S file
   // but can't invoke the function_a

  Get_Address c_function  ; get the address of c_function into a register r0
  call r0    ; try to call the c_function defined in c.c file
   // succeed in callng the c function here

what's the problem that I can't call a function from another .S file while I
can call the function from .C file in assembly file?

Thanks a lot






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