uprobes/x86: Emulate relative conditional "near" jmp's

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Change branch_setup_xol_ops() to simply use opc1 = OPCODE2(insn) - 0x10
if OPCODE1() == 0x0f; this matches the "short" jmp which checks the same
condition.

Thanks to lib/insn.c, it does the rest correctly. branch->ilen/offs are
correct no matter if this jmp is "near" or "short".

Reported-by: Jonathan Lebon <jlebon@redhat.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: Jim Keniston <jkenisto@us.ibm.com>

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Oleg Nesterov 2014-04-07 16:22:58 +02:00

parent 8f95505bc1

commit 6cc5e7ff2c

1 changed files with 8 additions and 0 deletions

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arch/x86/kernel/uprobes.c

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