ktap: new package

Add ktap, a script-based dynamic tracing tool.

Signed-off-by: Anders Darander <anders@chargestorm.se>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/Config.in

@@ -50,6 +50,7 @@ source "package/duma/Config.in"
 source "package/gdb/Config.in"
 source "package/iozone/Config.in"
 source "package/kexec/Config.in"
+source "package/ktap/Config.in"
 source "package/latencytop/Config.in"
 source "package/lmbench/Config.in"
 if BR2_PACKAGE_BUSYBOX_SHOW_OTHERS

package/ktap/Config.in

@@ -0,0 +1,26 @@
+config BR2_PACKAGE_KTAP
+	bool "ktap"
+	depends on BR2_LINUX_KERNEL
+	depends on BR2_TOOLCHAIN_HAS_THREADS
+	help
+	  ktap is a script-based dynamic tracing tool for Linux
+
+	  It uses a scripting language and lets users trace the Linux kernel
+	  dynamically. ktap is designed to give operational insights with
+	  interoperability that allows users to tune, troubleshoot and extend
+	  kernel and application. It's similar to Linux Systemtap and
+	  Solaris Dtrace.
+
+	  ktap doesn't support kernels older than 3.1.
+
+	  Your kernel must have CONFIG_EVENT_TRACING,
+	  CONFIG_PERF_EVENTS, and CONFIG_DEBUG_FS enabled to compile.
+
+	  http://www.ktap.org
+
+comment "ktap requires a linux kernel to be built"
+	depends on !BR2_LINUX_KERNEL
+
+comment "ktap needs a toolchain w/ threads"
+	depends on !BR2_TOOLCHAIN_HAS_THREADS
+

package/ktap/ktap-0001-interpreter-vm.c-include-uaccess.h.patch

@@ -0,0 +1,27 @@
+From 343cb5a8b11a1dfdf4262fce326113e889f13496 Mon Sep 17 00:00:00 2001
+From: Anders Darander <anders@chargestorm.se>
+Date: Sat, 9 Nov 2013 23:05:05 +0100
+Subject: [PATCH] interpreter/vm.c: include uaccess.h
+
+otherwise functions, such as copy_from_user, is implicitly defined.
+
+Signed-off-by: Anders Darander <anders@chargestorm.se>
+---
+ interpreter/vm.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/interpreter/vm.c b/interpreter/vm.c
+index bc7b951..f7cb794 100644
+--- a/interpreter/vm.c
++++ b/interpreter/vm.c
+@@ -28,6 +28,7 @@
+ #include <linux/signal.h>
+ #include <linux/sched.h>
+ #include "../include/ktap.h"
++#include <linux/uaccess.h>
+ 
+ #define KTAP_MINSTACK 20
+ 
+-- 
+1.8.4.2
+

package/ktap/ktap-0002-Set-PWD-in-Makefile.patch

@@ -0,0 +1,28 @@
+From 90a8dd877b7766b1ba722c19569cffb68625288b Mon Sep 17 00:00:00 2001
+From: Anders Darander <anders@chargestorm.se>
+Date: Mon, 11 Nov 2013 13:04:36 +0100
+Subject: Set PWD in Makefile
+
+When cross-compiling using e.g. buildroot, PWD was not reset in the Makefile.
+That caused PWD to have an incorrect value, and thus building the module failed.
+
+Signed-off-by: Anders Darander <anders@chargestorm.se>
+---
+ Makefile | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/Makefile b/Makefile
+index 372b41a..939d25e 100644
+--- a/Makefile
++++ b/Makefile
+@@ -25,6 +25,7 @@ ktapvm-y	:= $(INTP_OBJS)
+ 
+ KVERSION ?= $(shell uname -r)
+ KERNEL_SRC ?= /lib/modules/$(KVERSION)/build
++PWD := $(shell pwd)
+ mod:
+ 	$(MAKE) -C $(KERNEL_SRC) M=$(PWD) modules
+ 
+-- 
+1.8.4.2
+

package/ktap/ktap.mk

@@ -0,0 +1,25 @@
+################################################################################
+#
+# ktap, script-based dynamic tracing tool
+#
+################################################################################
+
+KTAP_VERSION = v0.3
+KTAP_SITE = $(call github,ktap,ktap,$(KTAP_VERSION))
+KTAP_SOURCE = v$(KTAP_VERSION).tar.gz
+KTAP_LICENSE = GPLv2
+KTAP_LICENSE_FILES = LICENSE-GPL
+
+KTAP_DEPENDENCIES = linux
+
+define KTAP_BUILD_CMDS
+	$(MAKE) -C $(@D) $(TARGET_CONFIGURE_OPTS) ktap
+	$(MAKE) -C $(@D) $(LINUX_MAKE_FLAGS) KERNEL_SRC=$(LINUX_DIR) KVERSION=$(LINUX_VERSION_PROBED) mod
+endef
+
+define KTAP_INSTALL_TARGET_CMDS
+	$(INSTALL) -D -m755 $(@D)/ktap  $(TARGET_DIR)/usr/bin/ktap
+	$(MAKE) -C $(@D) $(LINUX_MAKE_FLAGS) KERNEL_SRC=$(LINUX_DIR) KVERSION=$(LINUX_VERSION_PROBED) modules_install
+endef
+
+$(eval $(generic-package))