Re: Kernel printk format string compression: C syntax problem

[Bryan O'Sullivan]

On Fri, 2003-06-06 at 10:27, Timothy Miller wrote:

> printk( "EIP\200\3164x:[<\3168lx>] CPU\200%d\n" ,0xffff & 
> regs->xcs,regs->eip, (current_thread_info()->cpu));
> 
> GCC 3.0.4 makes the following complaint:
> 
> arch/i386/kernel/process.c:173: warning: too many arguments for format
> 
> What I believe is happening is that where I have the escape code "\316" 
> concatenated with the literal "8", the compiler is seeing it as "\3168" 
> and doesn't want to take it.

No.  Look at the __attribute__ on printk in include/linux/kernel.h.  GCC
believes that printk takes a printf-style format string as its first
argument, but you've mangled the string so that the number of format
specifiers doesn't match the number of arguments.

	<b