Messages in this thread | | | Date | Mon, 31 Mar 2014 21:43:37 +0200 | From | Oleg Nesterov <> | Subject | [PATCH 0/7] uprobes/x86: introduce uprobe_xol_ops and arch_uprobe->ops |
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Hello.
x86 can not handle the rip-relative jmp/call instrsuctions, the probed task can be killed by general protection fault. I'll describe this in more details when I send the fixes. Now I am sending the preparations which (I hope) make sense anyway, please review.
My main concern is 3/7. I know absolutely nothing about instruction decoding, so I can only guess what, for example, OPCODE1() == 0xff or MODRM_REG() == 2 actually means. Please review.
Ananth, David, please ack/nack the first change, it affects powerpc/arm.
Oleg.
arch/x86/include/asm/uprobes.h | 7 +- arch/x86/kernel/uprobes.c | 343 ++++++++++++++++++++-------------------- kernel/events/uprobes.c | 23 +--- 3 files changed, 176 insertions(+), 197 deletions(-)
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