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    Subject[RFC PATCH 2/3] early kprobes: x86: add definition for vmlinux.lds use.
    Date
    This patch defines MAX_OPTINSN_SIZE, MAX_INSN_SIZE and
    KPROBE_OPCODE_SIZE for x86 for vmlinux.lds.S use.

    Signed-off-by: Wang Nan <wangnan0@huawei.com>
    ---
    arch/x86/kernel/vmlinux.lds.S | 10 ++++++++++
    1 file changed, 10 insertions(+)

    diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
    index 00bf300..e46d877 100644
    --- a/arch/x86/kernel/vmlinux.lds.S
    +++ b/arch/x86/kernel/vmlinux.lds.S
    @@ -29,6 +29,16 @@

    #undef i386 /* in case the preprocessor is a 32bit one */

    +#ifdef CONFIG_EARLY_KPROBES
    +# define MAX_INSN_SIZE 16
    +# define RELATIVE_ADDR_SIZE 4
    +# define RELATIVEJUMP_SIZE 5
    +# define KPROBE_OPCODE_SIZE 1
    +# define MAX_OPTIMIZED_LENGTH (MAX_INSN_SIZE + RELATIVE_ADDR_SIZE)
    +# define MAX_OPTINSN_SIZE ((optprobe_template_end - optprobe_template_entry) + \
    + MAX_OPTIMIZED_LENGTH + RELATIVEJUMP_SIZE)
    +#endif
    +
    OUTPUT_FORMAT(CONFIG_OUTPUT_FORMAT, CONFIG_OUTPUT_FORMAT, CONFIG_OUTPUT_FORMAT)

    #ifdef CONFIG_X86_32
    --
    1.8.4


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