[PATCH] elf.h SHF_EXCLUDE signed int 31 bit shift triggers undefined behaviour.

[Florian Weimer]

On 04/21/2015 11:20 AM, Mark Wielaard wrote:
> -#define SHF_EXCLUDE	     (1 << 31)	/* Section is excluded unless
> +#define SHF_EXCLUDE	     (1U << 31)	/* Section is excluded unless

I think the safer change is to use -0x80000000 as the value of the
constant, without making it unsigned.  Otherwise my previous objections
apply.

I'm sorry it has come to this, I can empathize with your struggles to
get patches applied to glibc.

-- 
Florian Weimer / Red Hat Product Security