Dear Aneesh V,
In message <4dd2657f.3020...@ti.com> you wrote:
>
> >>>> +struct ch_toc {
> >>>> + uint32_t section_offset;
> >>>> + uint32_t section_size;
> >>>> + uint8_t unused[12];
> >>>> + uint8_t section_name[12];
> >>>> +} __attribute__ ((__packed__));
> >>>> +
> >>>> +struct ch_settings {
> >>>> + uint32_t section_key;
> >>>> + uint8_t valid;
> >>>> + uint8_t version;
> >>>> + uint16_t reserved;
> >>>> + uint32_t flags;
> >>>> +} __attribute__ ((__packed__));
> >>>> +
> >>>> +struct gp_header {
> >>>> + uint32_t size;
> >>>> + uint32_t load_addr;
> >>>> +} __attribute__ ((__packed__));
...
> > No. Not in the structs listed above.
>
> Why do you think it will not create any problems. For instance, what if
> the field "uint8_t version" in "struct ch_settings" is aligned to a 32
> bit boundary by the compiler for faster access? That is not the
> intended layout.
If the compiler did such a thing, this would indeed be bad. But I
have never seen a compiler doing this, nor is there a reason to do so.
The naturla alignment requirement for a uint8_t is a byte; ther eis no
need to align it on 4 byte boundary.
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: w...@denx.de
Man is the best computer we can put aboard a spacecraft ... and the
only one that can be mass produced with unskilled labor.
- Wernher von Braun
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