Re: [LinuxBIOS] drop struct lb_uint64?

[yhlu]

interesting, So even new gcc on x86 still default uint64_t to 32bit
alignment?

YH

On 11/12/05, Eric W. Biederman  wrote:
> Stefan Reinauer  writes:
> > Hi,
> >
> > what exactly is this structure good for?
> >
> > declared in src/include/boot/linuxbios_tables.h:
> >
> > struct lb_uint64 {
> > uint32_t lo;
> > uint32_t hi;
> > };
> >
> > It is used in the following files:
> >
> > src/arch/i386/boot/linuxbios_table.c
> > src/arch/ppc/boot/linuxbios_table.c
> > src/boot/elfboot.c
> >
> > since each machine that can compile LinuxBIOS, ie that has a
> > (cross-)gcc, does have a uint64_t we should use that one.
>
> No, it used to be a uint64_t and that caused problems. For reasons of
> backwards compatibility we want 32bit alignment not 64bit alignment.
> x86 only requires 32bit alignment for a unit64_t but x86_64 requires
> 64bit alignment.
>
> For all new instances I agree.
>
> Eric