From: Zachary Amsden <zach@vmware.com>
To: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@osdl.org>, Andi Kleen <ak@muc.de>,
Rusty Russell <rusty@rustcorp.com.au>,
Jeremy Fitzhardinge <jeremy@goop.org>,
Chris Wright <chrisw@sous-sol.org>,
Zachary Amsden <zach@vmware.com>
Subject: [PATCH 4/11] Kprobe rpl fix
Date: Mon, 5 Feb 2007 19:52:55 -0800 [thread overview]
Message-ID: <200702060352.l163qttg000739@zach-dev.vmware.com> (raw)
Kprobes bugfix for paravirt compatibility - RPL on the CS when inserting
BPs must match running kernel.
Signed-off-by: Zachary Amsden <zach@vmware.com>
CC: Eric Biederman <ebiederm@xmission.com>
diff -r fad1c2108c13 arch/i386/kernel/kprobes.c
--- a/arch/i386/kernel/kprobes.c Fri Feb 02 16:22:37 2007 -0800
+++ b/arch/i386/kernel/kprobes.c Fri Feb 02 16:28:48 2007 -0800
@@ -408,7 +408,7 @@ fastcall void *__kprobes trampoline_hand
spin_lock_irqsave(&kretprobe_lock, flags);
head = kretprobe_inst_table_head(current);
/* fixup registers */
- regs->xcs = __KERNEL_CS;
+ regs->xcs = __KERNEL_CS | get_kernel_rpl();
regs->eip = trampoline_address;
regs->orig_eax = 0xffffffff;
reply other threads:[~2007-02-06 3:53 UTC|newest]
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