Messages in this thread | | | Date | Tue, 6 Aug 2019 07:08:51 +0200 | From | Borislav Petkov <> | Subject | Re: [PATCH v9 04/11] x86/entry/64: Adapt assembly for PIE support |
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On Mon, Aug 05, 2019 at 10:50:30AM -0700, Thomas Garnier wrote: > I saw that %rdx was used for temporary usage and restored before the > end so I assumed that it was not an option.
PUSH_AND_CLEAR_REGS saves all regs earlier so I think you should be able to use others. Like SAVE_AND_SWITCH_TO_KERNEL_CR3/RESTORE_CR3, for example, uses %r15 and %r14.
-- Regards/Gruss, Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
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