From nobody Tue Nov 02 19:48:30 2021 X-Original-To: bugs@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id E6E7F182F357 for ; Tue, 2 Nov 2021 19:48:32 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4HkL741zCWz4gWr for ; Tue, 2 Nov 2021 19:48:32 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 19ACC318E for ; Tue, 2 Nov 2021 19:48:32 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 1A2JmWqW040751 for ; Tue, 2 Nov 2021 19:48:32 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 1A2JmW4i040750 for bugs@FreeBSD.org; Tue, 2 Nov 2021 19:48:32 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 228536] x11/nvidia-driver: 11.2-BETA3 - fails to operate correctly Date: Tue, 02 Nov 2021 19:48:30 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 11.1-STABLE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Many People X-Bugzilla-Who: ahmedsayeed1982@yahoo.com X-Bugzilla-Status: Closed X-Bugzilla-Resolution: Overcome By Events X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Bug reports List-Archive: https://lists.freebsd.org/archives/freebsd-bugs List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-bugs@freebsd.org MIME-Version: 1.0 X-ThisMailContainsUnwantedMimeParts: N https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D228536 Ahmed changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |ahmedsayeed1982@yahoo.com --- Comment #15 from Ahmed --- Minimal testcase: http://www.compilatori.com/category/computers/ .align 8 .globl main http://www.acpirateradio.co.uk/category/property/ .globl insn .type main, @function http://www.logoarts.co.uk/category/services/ .type insn, @function # This should return 0 on success. http://www.slipstone.co.uk/tech/nvidia-and-samsung/ main: basr %r1, %r0 insn: bc 15, win-insn(0,%r1) http://embermanchester.uk/category/technology/ lghi %r2,1 win: lghi %r2,0 https://www.mktrade.fi/ruiskuvalu br %r14 http://connstr.net/category/tech/ Assemble and link the above. Turn on displaced stepping, set a breakpoint on `insn`, run, then try to st= ep over the breakpoint with stepi. http://joerg.li/computers/latest-car-deals/ (gdb) set displaced-stepping on (gdb) b insn http://www.jopspeech.com/services/surface-duo/ (gdb) r (gdb) stepi http://www.wearelondonmade.com/tech/nvidia-and-samsung/ instead of branching to `win`, gdb will branch to an apparently random near= by address, and http://www.mconstantine.co.uk/category/sports/ the inferior wi= ll generally crash. This problem is present in all versions of GDB I've tested. https://waytowhatsnext.com/computers/what-is-ssl-certificate/ When trying to step over a breakpoint set on a BC (branch on condition) instruction with displaced stepping on IBM Z, gdb would incorrectly http://www.go-mk-websites.co.uk/category/sports/ adjust the pc regardless of whether or not the branch was taken. Since http://www.iu-bloomington.com/technology/advantages-of-online-banks/ the branch target is an absolute address, this would cause the inferior http://fishingnewsletters.co.uk/category/sports/ to jump around wildly whenever the branch was taken, either crashing it https://komiya-dental.com/sports/telegram/ or causing it to behave unpredicta When trying to step over a breakpoint set on a BC (branch on condition) http://www-look-4.com/property/houses-in-france/ instruction with displaced stepping on IBM Z, gdb would incorrectly adjust the pc regardless of whether http://the-hunters.org/category/property/ or not the branch was taken. Since the branch target is an absolute address, https://www.webb-dev.co.uk/sports/sports-and-health/ this would cause the inferior to jump around wildly whenever the branch was taken, either crashing it or causing it to behave unpredicta --=20 You are receiving this mail because: You are the assignee for the bug.=