Date: Sat, 16 Nov 2019 13:01:07 +0200 From: Konstantin Belousov <kostikbel@gmail.com> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: Re: svn commit: r354767 - stable/12/sys/amd64/amd64 Message-ID: <20191116110107.GK2707@kib.kiev.ua> In-Reply-To: <201911161049.xAGAnI4W064982@repo.freebsd.org> References: <201911161049.xAGAnI4W064982@repo.freebsd.org>
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On Sat, Nov 16, 2019 at 10:49:18AM +0000, Konstantin Belousov wrote: > Author: kib > Date: Sat Nov 16 10:49:17 2019 > New Revision: 354767 > URL: https://svnweb.freebsd.org/changeset/base/354767 > > Log: > MFC r354766: r354696 really. > amd64: only set PCB_FULL_IRET pcb flag when #gp or similar exception comes > from usermode. > > Modified: > stable/12/sys/amd64/amd64/exception.S > Directory Properties: > stable/12/ (props changed) > > Modified: stable/12/sys/amd64/amd64/exception.S > ============================================================================== > --- stable/12/sys/amd64/amd64/exception.S Sat Nov 16 08:16:50 2019 (r354766) > +++ stable/12/sys/amd64/amd64/exception.S Sat Nov 16 10:49:17 2019 (r354767) > @@ -497,8 +497,8 @@ prot_addrf: > 3: cmpw $KUG32SEL,TF_GS(%rsp) > jne 4f > movq %rdx,PCB_GSBASE(%rdi) > + orl $PCB_FULL_IRET,PCB_FLAGS(%rdi) /* full iret from user #gp */ > 4: call handle_ibrs_entry > - orl $PCB_FULL_IRET,PCB_FLAGS(%rdi) /* always full iret from GPF */ > movw %es,TF_ES(%rsp) > movw %ds,TF_DS(%rsp) > testl $PSL_I,TF_RFLAGS(%rsp)
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