From: Thomas Gleixner <tglx@linutronix.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: x86@kernel.org, Steven Rostedt <rostedt@goodmis.org>,
Brian Gerst <brgerst@gmail.com>, Juergen Gross <jgross@suse.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Arnd Bergmann <arnd@arndb.de>
Subject: [patch 3/8] x86/entry/common: Mark syscall entry points notrace/nokprobe
Date: Tue, 25 Feb 2020 23:08:04 +0100 [thread overview]
Message-ID: <20200225221305.496864179@linutronix.de> (raw)
In-Reply-To: 20200225220801.571835584@linutronix.de
Anything before enter_from_user_mode() is not safe to be traced or probed.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
arch/x86/entry/common.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
--- a/arch/x86/entry/common.c
+++ b/arch/x86/entry/common.c
@@ -314,11 +314,12 @@ void do_syscall_64_irqs_on(unsigned long
syscall_return_slowpath(regs);
}
-__visible void do_syscall_64(unsigned long nr, struct pt_regs *regs)
+__visible notrace void do_syscall_64(unsigned long nr, struct pt_regs *regs)
{
syscall_entry_fixups();
do_syscall_64_irqs_on(nr, regs);
}
+NOKPROBE_SYMBOL(do_syscall_64);
#endif
#if defined(CONFIG_X86_32) || defined(CONFIG_IA32_EMULATION)
@@ -369,11 +370,12 @@ static __always_inline void do_syscall_3
}
/* Handles int $0x80 */
-__visible void do_int80_syscall_32(struct pt_regs *regs)
+__visible notrace void do_int80_syscall_32(struct pt_regs *regs)
{
syscall_entry_fixups();
do_syscall_32_irqs_on(regs);
}
+NOKPROBE_SYMBOL(do_int80_syscall_32);
/* Fast syscall 32bit variant */
static __always_inline long do_fast_syscall_32_irqs_on(struct pt_regs *regs)
@@ -449,10 +451,11 @@ static __always_inline long do_fast_sysc
}
/* Returns 0 to return using IRET or 1 to return using SYSEXIT/SYSRETL. */
-__visible long do_fast_syscall_32(struct pt_regs *regs)
+__visible notrace long do_fast_syscall_32(struct pt_regs *regs)
{
syscall_entry_fixups();
return do_fast_syscall_32_irqs_on(regs);
}
+NOKPROBE_SYMBOL(do_fast_syscall_32);
#endif /* CONFIG_X86_32 || CONFIG_IA32_EMULATION */
next prev parent reply other threads:[~2020-02-25 23:25 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-25 22:08 [patch 0/8] x86/entry: Consolidation - Part II Thomas Gleixner
2020-02-25 22:08 ` [patch 1/8] x86/entry/64: Trace irqflags unconditionally on when returing to user space Thomas Gleixner
2020-02-27 19:49 ` Borislav Petkov
2020-02-27 22:45 ` Frederic Weisbecker
2020-02-28 8:58 ` Alexandre Chartre
2020-02-25 22:08 ` [patch 2/8] x86/entry/common: Consolidate syscall entry code Thomas Gleixner
2020-02-27 19:57 ` Borislav Petkov
2020-02-27 22:52 ` Frederic Weisbecker
2020-02-28 8:59 ` Alexandre Chartre
2020-02-25 22:08 ` Thomas Gleixner [this message]
2020-02-27 23:15 ` [patch 3/8] x86/entry/common: Mark syscall entry points notrace/nokprobe Frederic Weisbecker
2020-02-28 8:59 ` Alexandre Chartre
2020-02-25 22:08 ` [patch 4/8] x86/entry: Move irq tracing on syscall entry to C-code Thomas Gleixner
2020-02-26 5:43 ` Andy Lutomirski
2020-02-26 8:17 ` Peter Zijlstra
2020-02-26 11:20 ` Andy Lutomirski
2020-02-26 19:51 ` Thomas Gleixner
2020-02-29 14:44 ` Thomas Gleixner
2020-02-29 19:25 ` Andy Lutomirski
2020-02-29 23:58 ` Steven Rostedt
2020-03-01 10:16 ` Thomas Gleixner
2020-03-01 14:37 ` Andy Lutomirski
2020-03-01 15:21 ` Thomas Gleixner
2020-03-01 16:00 ` Andy Lutomirski
2020-03-01 18:12 ` Thomas Gleixner
2020-03-01 18:26 ` Paul E. McKenney
2020-03-01 18:54 ` Andy Lutomirski
2020-03-01 19:30 ` Paul E. McKenney
2020-03-01 19:39 ` Andy Lutomirski
2020-03-01 20:18 ` Paul E. McKenney
2020-03-02 0:35 ` Steven Rostedt
2020-03-02 6:47 ` Masami Hiramatsu
2020-03-02 1:10 ` Joel Fernandes
2020-03-02 2:18 ` Andy Lutomirski
2020-03-02 2:36 ` Joel Fernandes
2020-03-02 5:40 ` Andy Lutomirski
2020-03-02 8:10 ` Thomas Gleixner
2020-03-01 18:23 ` Steven Rostedt
2020-03-01 18:20 ` Steven Rostedt
2020-02-27 23:11 ` Frederic Weisbecker
2020-02-28 9:00 ` Alexandre Chartre
2020-02-25 22:08 ` [patch 5/8] x86/entry/common: Provide trace/kprobe safe exit to user space functions Thomas Gleixner
2020-02-26 5:45 ` Andy Lutomirski
2020-02-26 8:15 ` Peter Zijlstra
2020-02-27 15:43 ` Alexandre Chartre
2020-02-27 15:53 ` Thomas Gleixner
2020-02-25 22:08 ` [patch 6/8] x86/entry: Move irq tracing to syscall_slow_exit_work Thomas Gleixner
2020-02-26 5:47 ` Andy Lutomirski
2020-02-27 16:12 ` Alexandre Chartre
2020-02-25 22:08 ` [patch 7/8] x86/entry: Move irq tracing to prepare_exit_to_user_mode() Thomas Gleixner
2020-02-26 5:50 ` Andy Lutomirski
2020-02-26 19:53 ` Thomas Gleixner
2020-02-26 20:07 ` Andy Lutomirski
2020-02-25 22:08 ` [patch 8/8] x86/entry: Move irqflags tracing to do_int80_syscall_32() Thomas Gleixner
2020-02-27 16:46 ` Alexandre Chartre
2020-02-28 13:49 ` Thomas Gleixner
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