[PATCH v4 3.0-rc2-tip 1/22] 1: X86 specific breakpoint definitions.

[Srikar Dronamraju <srikar@linux.vnet.ibm.com>]

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 30041d8..7c843e2 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -243,6 +243,9 @@ 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..192ba4a
--- /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, 2008-2011
+ * Authors:
+ *	Srikar Dronamraju
+ *	Jim Keniston
+ */
+
+typedef u8 uprobe_opcode_t;
+#define MAX_UINSN_BYTES 16
+#define UPROBES_XOL_SLOT_BYTES	128	/* to keep it cache aligned */
+
+#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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