unw_step loops forever on MIPS.

[Story, Lenny]

Greetings,

I have a test of libunwind running on my mips target.  It seems the the 
unw_step api always returns > 0. This results in my backtrace loop never 
terminating.

Any thoughts on why this would happen ?

Thanks !
-Lenny

I am using 1.5.0.

 [BACKTRACE] (1) main:140
 [BACKTRACE] (1) _init:736
 [BACKTRACE] (1) _init:736
 [BACKTRACE] (1) _init:736
 [BACKTRACE] (1) _init:736
 [BACKTRACE] (1) _init:736
 [BACKTRACE] (1) _init:736
 [BACKTRACE] (1) _init:736
 [BACKTRACE] (1) _init:736
 [BACKTRACE] (1) _init:736
 [BACKTRACE] (1) _init:736
 [BACKTRACE] (1) _init:736


void show_backtrace(void)
{
    char symbol[256];
    unw_cursor_t  cursor;
    unw_context_t context;

    unw_getcontext(&context);
    unw_init_local(&cursor, &context);

    int Cursor_Result = 0;

    int n = 0;

    while((Cursor_Result = unw_step(&cursor)) > 0)
    {
        unw_word_t ip;
        unw_word_t sp;
        unw_word_t off;

        unw_get_reg(&cursor, UNW_REG_IP, &ip);
        unw_get_reg(&cursor, UNW_REG_SP, &sp);

        memset(&symbol, 0, sizeof(symbol));

        if (unw_get_proc_name(&cursor, &symbol[0], sizeof(symbol), &off) == 0)
        {
            fprintf(stdout, "[BACKTRACE] (%d) %s:%d \n", Cursor_Result, 
&symbol[0], off);
        }

        if(n++ > 10)
            break;
    }
}



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