On 5/25/22 3:38 AM, Andrew Turner wrote:
The branch main has been updated by andrew:
URL:
https://cgit.FreeBSD.org/src/commit/?id=e605b87a9e75a7f693527f0aad8189ae9db20f16
commit e605b87a9e75a7f693527f0aad8189ae9db20f16
Author: Dapeng Gao <[email protected]>
AuthorDate: 2022-05-25 10:25:06 +0000
Commit: Andrew Turner <[email protected]>
CommitDate: 2022-05-25 10:26:30 +0000
Save only callee-saved registers in pcb
On AArch64, registers x9-x18 are not callee-saved, yet they are
preserved at many placed in swtch.S. This patch removes code that
preserves these registers.
Do you plan to alter the layout of struct pcb? I'll need to make changes to
kgdb to not read these registers on newer kernels (and so probably need a
__FreeBSD_version bump to cue from, though I can probably just reuse the
previous bump). If you are going to alter the layout of struct pcb I'd
rather just do one change that handles both than trying to support all three
states.
--
John Baldwin
