From: torvalds at linux-foundation.org (Linus Torvalds) Subject: [PATCH 3/4] x86/ftrace: make ftrace_int3_handler() not to skip fops invocation Date: Mon, 29 Apr 2019 13:07:33 -0700 [thread overview] Message-ID: <CAHk-=wg1QPz0m+7jnVcjQgkySUQLzAXE8_PZARV-vWYK27LB=w@mail.gmail.com> (raw) In-Reply-To: <CALCETrXzVU0Q7u1q=QFPaDr=aojjF5cjbOi9CxxXnp5GqTqsWA@mail.gmail.com> On Mon, Apr 29, 2019 at 12:24 PM Andy Lutomirski <luto at kernel.org> wrote: > > Side note: we *already* depend on sti shadow working in other parts of the kernel, namely sti->iret. > > Where? STI; IRET would be nuts. Sorry, not 'sti;iret' but 'sti;sysexit' > before commit 4214a16b02971c60960afd675d03544e109e0d75 > x86/asm/entry/64/compat: Use SYSRETL to return from compat mode SYSENTER > > we did sti; sysxit, but, when we discussed this, I don't recall anyone > speaking up in favor of the safely of the old code. We still have that sti sysexit in the 32-bit code. Linus
WARNING: multiple messages have this Message-ID (diff)
From: torvalds@linux-foundation.org (Linus Torvalds) Subject: [PATCH 3/4] x86/ftrace: make ftrace_int3_handler() not to skip fops invocation Date: Mon, 29 Apr 2019 13:07:33 -0700 [thread overview] Message-ID: <CAHk-=wg1QPz0m+7jnVcjQgkySUQLzAXE8_PZARV-vWYK27LB=w@mail.gmail.com> (raw) Message-ID: <20190429200733.sZZhCSqZNyvm2mM3ERGC3y6ue3RoIF3mLlx5RfIUifA@z> (raw) In-Reply-To: <CALCETrXzVU0Q7u1q=QFPaDr=aojjF5cjbOi9CxxXnp5GqTqsWA@mail.gmail.com> On Mon, Apr 29, 2019@12:24 PM Andy Lutomirski <luto@kernel.org> wrote: > > Side note: we *already* depend on sti shadow working in other parts of the kernel, namely sti->iret. > > Where? STI; IRET would be nuts. Sorry, not 'sti;iret' but 'sti;sysexit' > before commit 4214a16b02971c60960afd675d03544e109e0d75 > x86/asm/entry/64/compat: Use SYSRETL to return from compat mode SYSENTER > > we did sti; sysxit, but, when we discussed this, I don't recall anyone > speaking up in favor of the safely of the old code. We still have that sti sysexit in the 32-bit code. Linus
next prev parent reply other threads:[~2019-04-29 20:07 UTC|newest] Thread overview: 128+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-04-27 10:06 [PATCH 0/4] x86/ftrace: make ftrace_int3_handler() not to skip fops invocation nstange 2019-04-27 10:06 ` Nicolai Stange 2019-04-27 10:06 ` [PATCH 1/4] x86/thread_info: introduce ->ftrace_int3_stack member nstange 2019-04-27 10:06 ` Nicolai Stange 2019-04-28 17:41 ` luto 2019-04-28 17:41 ` Andy Lutomirski 2019-04-28 17:51 ` rostedt 2019-04-28 17:51 ` Steven Rostedt 2019-04-28 18:08 ` luto 2019-04-28 18:08 ` Andy Lutomirski 2019-04-28 19:43 ` rostedt 2019-04-28 19:43 ` Steven Rostedt 2019-04-28 20:56 ` luto 2019-04-28 20:56 ` Andy Lutomirski 2019-04-28 21:22 ` nstange 2019-04-28 21:22 ` Nicolai Stange 2019-04-28 23:27 ` luto 2019-04-28 23:27 ` Andy Lutomirski 2019-04-27 10:06 ` [PATCH 2/4] ftrace: drop 'static' qualifier from ftrace_ops_list_func() nstange 2019-04-27 10:06 ` Nicolai Stange 2019-04-27 10:06 ` [PATCH 3/4] x86/ftrace: make ftrace_int3_handler() not to skip fops invocation nstange 2019-04-27 10:06 ` Nicolai Stange 2019-04-27 10:26 ` peterz 2019-04-27 10:26 ` Peter Zijlstra 2019-04-28 17:38 ` rostedt 2019-04-28 17:38 ` Steven Rostedt 2019-04-29 18:06 ` torvalds 2019-04-29 18:06 ` Linus Torvalds 2019-04-29 18:22 ` torvalds 2019-04-29 18:22 ` Linus Torvalds 2019-04-29 18:42 ` luto 2019-04-29 18:42 ` Andy Lutomirski [not found] ` <CAHk-=whtt4K2f0KPtG-4Pykh3FK8UBOjD8jhXCUKB5nWDj_YRA@mail.gmail.com> 2019-04-29 18:56 ` luto 2019-04-29 18:56 ` Andy Lutomirski [not found] ` <CAHk-=wgewK4eFhF3=0RNtk1KQjMANFH6oDE=8m=84RExn2gxhw@mail.gmail.com> [not found] ` <CAHk-=whay7eN6+2gZjY-ybRbkbcqAmgrLwwszzHx8ws3c=S-MA@mail.gmail.com> 2019-04-29 19:24 ` luto 2019-04-29 19:24 ` Andy Lutomirski 2019-04-29 20:07 ` torvalds [this message] 2019-04-29 20:07 ` Linus Torvalds 2019-04-30 13:56 ` peterz 2019-04-30 13:56 ` Peter Zijlstra 2019-04-30 16:06 ` torvalds 2019-04-30 16:06 ` Linus Torvalds 2019-04-30 16:33 ` luto 2019-04-30 16:33 ` Andy Lutomirski 2019-04-30 17:03 ` rostedt 2019-04-30 17:03 ` Steven Rostedt 2019-04-30 17:20 ` rostedt 2019-04-30 17:20 ` Steven Rostedt 2019-04-30 17:49 ` [RFC][PATCH] ftrace/x86: Emulate call function while updating in breakpoint handler rostedt 2019-04-30 17:49 ` Steven Rostedt 2019-04-30 18:33 ` torvalds 2019-04-30 18:33 ` Linus Torvalds 2019-04-30 19:00 ` rostedt 2019-04-30 19:00 ` Steven Rostedt 2019-04-30 21:08 ` rostedt 2019-04-30 21:08 ` Steven Rostedt 2019-05-01 13:11 ` peterz 2019-05-01 13:11 ` Peter Zijlstra 2019-05-01 18:58 ` rostedt 2019-05-01 18:58 ` Steven Rostedt 2019-05-01 19:03 ` peterz 2019-05-01 19:03 ` Peter Zijlstra 2019-05-01 19:03 ` torvalds 2019-05-01 19:03 ` Linus Torvalds 2019-05-01 19:13 ` peterz 2019-05-01 19:13 ` Peter Zijlstra 2019-05-01 19:13 ` rostedt 2019-05-01 19:13 ` Steven Rostedt 2019-05-01 19:33 ` jikos 2019-05-01 19:33 ` Jiri Kosina 2019-05-01 19:41 ` peterz 2019-05-01 19:41 ` Peter Zijlstra 2019-04-30 21:53 ` [RFC][PATCH v2] " rostedt 2019-04-30 21:53 ` Steven Rostedt 2019-05-01 1:35 ` rostedt 2019-05-01 1:35 ` Steven Rostedt 2019-05-01 1:58 ` torvalds 2019-05-01 1:58 ` Linus Torvalds 2019-05-01 8:26 ` nstange 2019-05-01 8:26 ` Nicolai Stange 2019-05-01 13:22 ` rostedt 2019-05-01 13:22 ` Steven Rostedt 2019-04-29 20:16 ` [PATCH 3/4] x86/ftrace: make ftrace_int3_handler() not to skip fops invocation torvalds 2019-04-29 20:16 ` Linus Torvalds 2019-04-29 22:08 ` sean.j.christopherson 2019-04-29 22:08 ` Sean Christopherson 2019-04-29 22:22 ` torvalds 2019-04-29 22:22 ` Linus Torvalds 2019-04-30 0:08 ` sean.j.christopherson 2019-04-30 0:08 ` Sean Christopherson 2019-04-30 0:45 ` sean.j.christopherson 2019-04-30 0:45 ` Sean Christopherson 2019-04-30 2:26 ` torvalds 2019-04-30 2:26 ` Linus Torvalds 2019-04-30 10:40 ` peterz 2019-04-30 10:40 ` Peter Zijlstra 2019-04-30 11:17 ` jikos 2019-04-30 11:17 ` Jiri Kosina 2019-04-29 22:06 ` torvalds 2019-04-29 22:06 ` Linus Torvalds 2019-04-30 11:18 ` peterz 2019-04-30 11:18 ` Peter Zijlstra 2019-04-29 18:52 ` rostedt 2019-04-29 18:52 ` Steven Rostedt [not found] ` <CAHk-=wjm93jLtVxTX4HZs6K4k1Wqh3ujjmapqaYtcibVk_YnzQ@mail.gmail.com> 2019-04-29 19:07 ` rostedt 2019-04-29 19:07 ` Steven Rostedt 2019-04-29 20:06 ` torvalds 2019-04-29 20:06 ` Linus Torvalds 2019-04-29 20:20 ` torvalds 2019-04-29 20:20 ` Linus Torvalds 2019-04-29 20:30 ` rostedt 2019-04-29 20:30 ` Steven Rostedt 2019-04-29 21:38 ` torvalds 2019-04-29 21:38 ` Linus Torvalds 2019-04-29 22:07 ` rostedt 2019-04-29 22:07 ` Steven Rostedt 2019-04-30 9:24 ` nstange 2019-04-30 9:24 ` Nicolai Stange 2019-04-30 10:46 ` peterz 2019-04-30 10:46 ` Peter Zijlstra 2019-04-30 13:44 ` rostedt 2019-04-30 13:44 ` Steven Rostedt 2019-04-30 14:20 ` peterz 2019-04-30 14:20 ` Peter Zijlstra 2019-04-30 14:36 ` rostedt 2019-04-30 14:36 ` Steven Rostedt 2019-04-27 10:06 ` [PATCH 4/4] selftests/livepatch: add "ftrace a live patched function" test nstange 2019-04-27 10:06 ` Nicolai Stange
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