Re: [PATCH 1/3] x86: record relocation offset

James Bottomley
2009-12-30T23:41:57Z

On Wed, 2009-12-30 at 15:26 -0800, H. Peter Anvin wrote:
> Modules are a completely separate thing - they are linked (not even
> just relocated) at insertion time, so they need to be tracked
> separately.

The reasons I gave was why _text relocation didn't work properly for
systemtap. The first paragraph was just giving a precis of history
explaining to Arnaldo why he remembered there was a problem with _text
based relocations.

> The statement that a _text-based relocation is insufficient is false.
> The entire x86-32 monolithic kernel is relocated as a unit. The
> x86-64 kernel, too, is relocated as a unit, but using the page tables,
> which means it always runs at the compile-time-selected virtual
> address.

Confused now ... you just repeated what I said in the second paragraph,
but made it sound like you are disagreeing?

James