Date: Tue, 02 Nov 2021 19:48:30 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 228536] x11/nvidia-driver: 11.2-BETA3 - fails to operate correctly Message-ID: <bug-228536-227-w0YjjUYVAg@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-228536-227@https.bugs.freebsd.org/bugzilla/> References: <bug-228536-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D228536 Ahmed <ahmedsayeed1982@yahoo.com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |ahmedsayeed1982@yahoo.com --- Comment #15 from Ahmed <ahmedsayeed1982@yahoo.com> --- 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.=
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