Uclinux-2008r1-rc8 (bf561) to VDSP5 transplantation (in): WARN ()

Many of the functions in the Uclinux kernel are not invoked at the outset, but only as a function pointer, in order to avoid excessive link errors from the outset, a macro is defined in Config.h:

#ifndef __ASSEMBLY__
#include <ccblkfn.h>
#include <stdio.h>
#endif

#define WARN()
do {fprintf(stderr, "code omited: %d @ %s/n", __LINE__, __FILE__); while(1) idle();} while(0)

When a link error occurs, the function body is first identified, followed by warn (), as follows:

static void
default_handler(int var_segment, struct pt_regs *regp)
{
//　　 set_personality(0);
//
//　　 if (current_thread_info()->exec_domain->handler != default_handler)
//　　　　　　 current_thread_info()->exec_domain->handler(var_segment, regp);
//　　 else
//　　　　　　 send_sig(SIGSEGV, current, 1);
WARN();
}

So, when you run to this function, you'll output a hint and stop, and we'll remove the comment from the function body, hehe ...