Re: [PATCH v3 18/21] vmcore: check if vmcore objects satify mmap()'spage-size boundary requirement

From: Vivek Goyal
Date: Thu Mar 21 2013 - 10:58:01 EST

On Wed, Mar 20, 2013 at 11:29:05PM -0700, Eric W. Biederman wrote:

> Preserving the actual PT_LOAD segments p_paddr and p_memsz values is
> important. p_offset we can change as much as we want. Which means there
> can be logical holes in the file between PT_LOAD segments, where we put
> the extra data needed to keep everything page aligned.

Agreed. If one modifies p_paddr then one will have to modify p->vaddr
too. And user space tools look at p->vaddr and where is the corresponding
physical address. Keeping p_vaddr and p_paddr intact makes sense.

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