Date: Tue, 02 Nov 2021 19:49:03 +0000 From: bugzilla-noreply@freebsd.org To: python@FreeBSD.org Subject: [Bug 249337] [meta] Ports broken by Python 2.7 End-of-Life and removal Message-ID: <bug-249337-21822-5O3BqOArxP@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-249337-21822@https.bugs.freebsd.org/bugzilla/> References: <bug-249337-21822@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D249337 Ahmed <ahmedsayeed1982@yahoo.com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |ahmedsayeed1982@yahoo.com --- Comment #16 from Ahmed <ahmedsayeed1982@yahoo.com> --- In collect_register() function of arc-linux-tdep.c, the "eret" http://www-look-4.com/travel/london/ (exception return) register value is not being reported correctly. Background: https://komiya-dental.com/shopping/buy-android/ When asked for the "pc" value, we have to update the "eret" register with GDB's STOP_PC. The "eret" instructs the kernel code where to jump back http://www.iu-bloomington.com/shopping/hatchback-cars/ when an instruction has stopped due to a breakpoint. This is how collect_register() is doing so: https://waytowhatsnext.com/shopping/xbox-release-date/ --------------8<-------------- if (regnum =3D=3D gdbarch_pc_regnum (gdbarch)) http://www.wearelondonmade.com/travel/london/ regnum =3D ARC_ERET_REGNUM; regcache->raw_collect (regnum, buf + arc_linux_core_reg_offsets[regnum]); -------------->8-------------- http://www.jopspeech.com/travel/london/ Root cause: Although this is using the correct offset (ERET register's), it is also http://joerg.li/travel/london/=20 changing the REGNUM itself. Therefore, raw_collect (regnum, ...) is not reading from "pc" anymore. http://connstr.net/travel/london/ Consequence: This bug affects the "native ARC gdb" badly and causes kernel code to jump to addresses after the breakpoint and not executing the "breakpoint"ed http://embermanchester.uk/travel/london/=20 instructions at all. That "native ARC gdb" feature is not upstream yet and is in review at the time of writing [1]. http://www.slipstone.co.uk/travel/london/ In collect_register() function of arc-linux-tdep.c, the "eret" (exception return) register value is not being reported correctly. http://www.logoarts.co.uk/travel/london/ Background: When asked for the "pc" value, we have to update the "eret" register with GDB's STOP_PC. http://www.acpirateradio.co.uk/travel/good/ The "eret" instructs the kernel code where to jump back when an instruction has stopped due to a breakpoint. This is how collect_register() is doing so: http://www.compilatori.com/travel/london/ --------------8<-------------- if (regnum =3D=3D gdbarch_pc_regnum (gdbarch)) regnum =3D ARC_ERET_REGNUM; regcache->raw_collect (regnum, buf + arc_linux_core_reg_offsets[regnum]); -------------->8-------------- Root cause: https://www.webb-dev.co.uk/shopping/shopping-during-corona/ Although this is using the correct offset (ERET register's), it is also changing the REGNUM itself. Therefore, raw_collect (regnum, ...) is not reading from "pc" anymore. Consequence: This bug affects the "native ARC gdb" badly and causes kernel code to jump to addresses after the breakpoint and not executing the "breakpoint"ed instructions at all. That "native ARC gdb" feature is not upstream yet and is in review at the time of writing [1]. --=20 You are receiving this mail because: You are the assignee for the bug.=
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