Problem with debugging assembly code with NIOS II

Altera_Forum · ‎07-23-2005

I have an assembly file that looks like the following:

#include "nios2.h"# include "system.h"# include "cpu_const.h"
    .extern    tmp_space
       .section .text
 
1        .global _cpu_task_start
2   _cpu_task_start:
3        movia    r22, tmp_space
4        movia    r23, REGISTERS_OFFSET
5 _cpu_task_loop:
6        ldbio    r21,status_offset(r23)    
7        andi    r2,r21,status_rec_bit
8        beq    r2,r0, koniec_rec
     ...................
        and so on

And I have c code witch calls this function

9 _cpu_task_start();

Everything compiling and linking ok. It seems to work ok too. But if I try to debug it with NIOS II IDE, I can't debug assembly function.

When debugger stops on line 9, debugging work fine, I see source code window and disassembly window. When I try to do “Step Into” debugger stops at the first line, but I can see it only on disassembly window, the source code window still remain on line 9

<div class='quotetop'>QUOTE </div>

--- Quote Start ---

Disassembly window

0x01000594 <_cpu_task_start>: movhi r22,257

0x01000598 <_cpu_task_start+4>: addi r22,r22,11376

0x0100059c <_cpu_task_start+8>: movhi r23,160

0x010005a0 <_cpu_task_start+12>: addi r23,r23,512[/b]

--- Quote End ---

In this way, I only can debug first two line of assembly code, line no. 6 is unreachable.

(Debugger dont stop, if I suspend, it stops in C code, much more ahead).

If I set a breakpoint in line 7, the debugger stops in entirely different function “alt_irq_init”.

It seems for me, that debugger doesn't see my test.s file.

Pleas help, what can I do to debug it in normal way.

The assembly part of start up code is debugging fine.

I'll be appreciate for any advice.

I use NIOS V5.0.

Regards

Darek