Date: Sat, 10 Apr 2021 01:25:13 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: 2f1588474768 - main - amd64 linux64: use x86_clear_dbregs() Message-ID: <202104100125.13A1PDFK043301@gitrepo.freebsd.org>
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The branch main has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=2f1588474768f61f3a983af207e753bd0340a9e7 commit 2f1588474768f61f3a983af207e753bd0340a9e7 Author: Konstantin Belousov <kib@FreeBSD.org> AuthorDate: 2021-04-09 23:22:48 +0000 Commit: Konstantin Belousov <kib@FreeBSD.org> CommitDate: 2021-04-10 01:25:02 +0000 amd64 linux64: use x86_clear_dbregs() instead of manually inlining it Reviewed by: jhb Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D29687 --- sys/amd64/linux/linux_sysvec.c | 22 +--------------------- 1 file changed, 1 insertion(+), 21 deletions(-) diff --git a/sys/amd64/linux/linux_sysvec.c b/sys/amd64/linux/linux_sysvec.c index abc750c63682..252579a4809e 100644 --- a/sys/amd64/linux/linux_sysvec.c +++ b/sys/amd64/linux/linux_sysvec.c @@ -477,27 +477,7 @@ linux_exec_setregs(struct thread *td, struct image_params *imgp, regs->tf_gs = _ugssel; regs->tf_flags = TF_HASSEGS; - /* - * Reset the hardware debug registers if they were in use. - * They won't have any meaning for the newly exec'd process. - */ - if (pcb->pcb_flags & PCB_DBREGS) { - pcb->pcb_dr0 = 0; - pcb->pcb_dr1 = 0; - pcb->pcb_dr2 = 0; - pcb->pcb_dr3 = 0; - pcb->pcb_dr6 = 0; - pcb->pcb_dr7 = 0; - if (pcb == curpcb) { - /* - * Clear the debug registers on the running - * CPU, otherwise they will end up affecting - * the next process we switch to. - */ - reset_dbregs(); - } - clear_pcb_flags(pcb, PCB_DBREGS); - } + x86_clear_dbregs(pcb); /* * Drop the FP state if we hold it, so that the process gets a
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