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    Subject[RFC] [PATCH 2.6.37-rc5-tip 2/20] 2: X86 specific breakpoint definitions.

    Provides definitions for the breakpoint instruction and x86 specific
    uprobe info structure.

    Signed-off-by: Jim Keniston <jkenisto@us.ibm.com>
    Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
    ---
    arch/x86/Kconfig | 3 +++
    arch/x86/include/asm/uprobes.h | 40 ++++++++++++++++++++++++++++++++++++++++
    2 files changed, 43 insertions(+), 0 deletions(-)
    create mode 100644 arch/x86/include/asm/uprobes.h

    diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
    index b6fccb0..bcbbc52 100644
    --- a/arch/x86/Kconfig
    +++ b/arch/x86/Kconfig
    @@ -239,6 +239,9 @@ config ARCH_CPU_PROBE_RELEASE
    def_bool y
    depends on HOTPLUG_CPU

    +config ARCH_SUPPORTS_UPROBES
    + def_bool y
    +
    source "init/Kconfig"
    source "kernel/Kconfig.freezer"

    diff --git a/arch/x86/include/asm/uprobes.h b/arch/x86/include/asm/uprobes.h
    new file mode 100644
    index 0000000..0e8ad5d
    --- /dev/null
    +++ b/arch/x86/include/asm/uprobes.h
    @@ -0,0 +1,40 @@
    +#ifndef _ASM_UPROBES_H
    +#define _ASM_UPROBES_H
    +/*
    + * Userspace Probes (UProbes) for x86
    + *
    + * This program is free software; you can redistribute it and/or modify
    + * it under the terms of the GNU General Public License as published by
    + * the Free Software Foundation; either version 2 of the License, or
    + * (at your option) any later version.
    + *
    + * This program is distributed in the hope that it will be useful,
    + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    + * GNU General Public License for more details.
    + *
    + * You should have received a copy of the GNU General Public License
    + * along with this program; if not, write to the Free Software
    + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
    + *
    + * Copyright (C) IBM Corporation, 2008-2010
    + * Authors:
    + * Srikar Dronamraju
    + * Jim Keniston
    + */
    +
    +typedef u8 uprobe_opcode_t;
    +#define MAX_UINSN_BYTES 16
    +#define UPROBES_XOL_SLOT_BYTES (MAX_UINSN_BYTES)
    +
    +#define UPROBES_BKPT_INSN 0xcc
    +#define UPROBES_BKPT_INSN_SIZE 1
    +
    +#ifdef CONFIG_X86_64
    +struct uprobe_arch_info {
    + unsigned long rip_rela_target_address;
    +};
    +#else
    +struct uprobe_arch_info {};
    +#endif
    +#endif /* _ASM_UPROBES_H */

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