[PATCH v4] ARM: Thumb-2: Symbol manipulation macros for function body copying

Dave Martin dave.martin at linaro.org
Mon Jan 17 10:35:57 EST 2011


On Mon, Jan 17, 2011 at 2:02 PM, Jean Pihet <jean.pihet at newoldbits.com> wrote:


> Note that aligning the source and destination pointers to a multiple
> of 8 bytes has an impact on the behavio(u)r and so must be carefully
> thought and tested on OMAP1/2/3 platforms.

Do you have any specific concerns regarding this?

Currently, the only issue I can think of is that the need to allocate
aligned memory from the SRAM will increase the total amount allocated,
which could be a problem if we end up overflowing the available SRAM.

This does not appear to happen in the case I've tested -- I currently
round up the amount allocated in omap_sram_push to be a multiple of 8
bytes.  This, combined with a couple of ".align 3" directives, is
enough to get me a booting system on omap3... but I haven't tested


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