* [PATCH 4/11] Kprobe rpl fix
@ 2007-02-06 3:52 Zachary Amsden
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From: Zachary Amsden @ 2007-02-06 3:52 UTC (permalink / raw)
To: Linux Kernel Mailing List, Andrew Morton, Andi Kleen,
Rusty Russell, Jeremy Fitzhardinge, Chris Wright, Zachary Amsden
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;
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2007-02-06 3:52 [PATCH 4/11] Kprobe rpl fix Zachary Amsden
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