Date: Mon, 16 Sep 2024 08:15:04 GMT From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 180c8ab07995 - main - amd64 la57_trampoline: jump immediately after re-enabling paging Message-ID: <202409160815.48G8F4xg027032@gitrepo.freebsd.org>
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The branch main has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=180c8ab079950acb15c6629ce293055ea0117b39 commit 180c8ab079950acb15c6629ce293055ea0117b39 Author: Konstantin Belousov <kib@FreeBSD.org> AuthorDate: 2022-09-17 01:35:20 +0000 Commit: Konstantin Belousov <kib@FreeBSD.org> CommitDate: 2024-09-16 08:09:03 +0000 amd64 la57_trampoline: jump immediately after re-enabling paging Literally follow requirements from SDM and execute jmp right after %cr0 CR0_PG bit is toggled back. Sponsored by: Advanced Micro Devices (AMD) Sponsored by: The FreeBSD Foundation MFC after: 1 week --- sys/amd64/amd64/locore.S | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/sys/amd64/amd64/locore.S b/sys/amd64/amd64/locore.S index e52d36125afd..a51e5047fe54 100644 --- a/sys/amd64/amd64/locore.S +++ b/sys/amd64/amd64/locore.S @@ -119,8 +119,9 @@ l1: movl $(3<<3),%eax movl %edi,%cr3 movl %edx,%cr0 + jmp 1f - pushl $(1<<3) +1: pushl $(1<<3) pushl %ebx lretl .code64
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