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* samples/kretprobe: fix the wrong typeHuang Shijie2016-08-041-2/+2
| | | | | | | | | | | | | | | | | | | | The regs_return_value() returns "unsigned long" or "long" value. But the retval is int type now, it may cause overflow, the log may becomes: [ 2911.078869] do_brk returned -2003877888 and took 4620 ns to execute This patch converts the retval to "unsigned long" type, and fixes the overflow issue. Link: http://lkml.kernel.org/r/1464143083-3877-4-git-send-email-shijie.huang@arm.com Signed-off-by: Huang Shijie <shijie.huang@arm.com> Cc: Petr Mladek <pmladek@suse.com> Cc: Steve Capper <steve.capper@arm.com> Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* samples/kretprobe: convert the printk to pr_info/pr_errHuang Shijie2016-08-041-7/+5
| | | | | | | | | | | | | | | | We prefer to use the pr_* to print out the log now, this patch converts the printk to pr_info. In the error path, use the pr_err to replace the printk. Link: http://lkml.kernel.org/r/1464143083-3877-3-git-send-email-shijie.huang@arm.com Signed-off-by: Huang Shijie <shijie.huang@arm.com> Cc: Petr Mladek <pmladek@suse.com> Cc: Steve Capper <steve.capper@arm.com> Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* samples/jprobe: convert the printk to pr_info/pr_errHuang Shijie2016-08-041-3/+3
| | | | | | | | | | | | | | | | We prefer to use the pr_* to print out the log now, this patch converts the printk to pr_info. In the error path, use the pr_err to replace the printk. Link: http://lkml.kernel.org/r/1464143083-3877-2-git-send-email-shijie.huang@arm.com Signed-off-by: Huang Shijie <shijie.huang@arm.com> Cc: Petr Mladek <pmladek@suse.com> Cc: Steve Capper <steve.capper@arm.com> Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* samples/kprobe: convert the printk to pr_info/pr_errHuang Shijie2016-08-041-17/+12
| | | | | | | | | | | | | | | | We prefer to use the pr_* to print out the log now, this patch converts the printk to pr_info. In the error path, use the pr_err to replace the printk. Link: http://lkml.kernel.org/r/1464143083-3877-1-git-send-email-shijie.huang@arm.com Signed-off-by: Huang Shijie <shijie.huang@arm.com> Cc: Petr Mladek <pmladek@suse.com> Cc: Steve Capper <steve.capper@arm.com> Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kprobes: Add arm64 case in kprobe example moduleSandeepa Prabhu2016-07-191-0/+9
| | | | | | | | | Add info prints in sample kprobe handlers for ARM64 Signed-off-by: Sandeepa Prabhu <sandeepa.s.prabhu@gmail.com> Signed-off-by: David A. Long <dave.long@linaro.org> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* samples/kprobes: print out the symbol name for the hooksHuang Shijie2016-05-201-16/+16
| | | | | | | | | | | | Print out the symbol name for the hooks, it makes the logs more readable. Link: http://lkml.kernel.org/r/1463535417-29637-2-git-send-email-shijie.huang@arm.com Signed-off-by: Huang Shijie <shijie.huang@arm.com> Cc: Petr Mladek <pmladek@suse.com> Cc: Steve Capper <steve.capper@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* samples/kprobes: add a new module parameterHuang Shijie2016-05-201-1/+5
| | | | | | | | | | | | | | | | | Add a new module parameter which can be used as the symbol name. Without this patch, we can only test the "_do_fork" function with this kernel module. With this patch, the module becomes more flexible; we can test any functions with this module with # insmod kprobe_example.ko symbol="xxx" Link: http://lkml.kernel.org/r/1463535417-29637-1-git-send-email-shijie.huang@arm.com Signed-off-by: Huang Shijie <shijie.huang@arm.com> Cc: Petr Mladek <pmladek@suse.com> Cc: Steve Capper <steve.capper@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kprobes: add the "tls" argument for j_do_forkHuang Shijie2016-05-201-1/+1
| | | | | | | | | | | | | | | Commit 3033f14ab78c ("clone: support passing tls argument via C rather than pt_regs magic") added the tls argument for _do_fork(). This patch adds the "tls" argument for j_do_fork to make it match _do_fork(). Signed-off-by: Huang Shijie <shijie.huang@arm.com> Acked-by: Steve Capper <steve.capper@arm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Thiago Macieira <thiago.macieira@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kprobes: use _do_fork() in samples to make them work againPetr Mladek2015-10-013-12/+12
| | | | | | | | | | | | | | | | | | | | | | | | Commit 3033f14ab78c ("clone: support passing tls argument via C rather than pt_regs magic") introduced _do_fork() that allowed to pass @tls parameter. The old do_fork() is defined only for architectures that are not ready to use this way and do not define HAVE_COPY_THREAD_TLS. Let's use _do_fork() in the kprobe examples to make them work again on all architectures. Signed-off-by: Petr Mladek <pmladek@suse.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Thiago Macieira <thiago.macieira@intel.com> Cc: Jiri Kosina <jkosina@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kprobes: update jprobe_example.c for do_fork() changeMichael Ellerman2014-09-261-5/+4
| | | | | | | | | | | | | | | In commit e80d666 "flagday: kill pt_regs argument of do_fork()", the arguments to do_fork() changed. The example code in jprobe_example.c was not updated to match, so the arguments inside the jprobe handler do not match reality. Fix it by updating the arguments to match do_fork(). While we're at it use pr_info() for brevity, and print stack_start as well for interest. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* tile: support kprobes on tilegxTony Lu2013-08-301-0/+9
| | | | | | | | This change includes support for Kprobes, Jprobes and Return Probes. Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Tony Lu <zlu@tilera.com> Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
* SAMPLES: kprobe_example: Make it print something on MIPS.David Daney2010-08-051-0/+9
| | | | | | | | | | | | | | | | This KProbes example is a little useless if it doesn't print anything. For MIPS print similar messages to those produced on x86 and PPC. Signed-off-by: David Daney <ddaney@caviumnetworks.com> To: linux-mips@linux-mips.org To: ananth@in.ibm.com To: anil.s.keshavamurthy@intel.com To: davem@davemloft.net To: masami.hiramatsu.pt@hitachi.com Cc: linux-kernel@vger.kernel.org Cc: hschauhan@nulltrace.org Patchwork: https://patchwork.linux-mips.org/patch/1528/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* sparc64: cheaper asm/uaccess.h inclusionAlexey Dobriyan2009-08-161-0/+1
| | | | | | | | sched.h inclusion is definitely not needed like in 32-bit version, remove it, fixup compilation. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Kprobes: move kprobe examples to samples/Ananth N Mavinakayanahalli2008-03-044-0/+270
Move kprobes examples from Documentation/kprobes.txt to under samples/. Patch originally by Randy Dunlap. o Updated the patch to apply on 2.6.25-rc3 o Modified examples code to build on multiple architectures. Currently, the kprobe and jprobe examples code works for x86 and powerpc o Cleaned up unneeded #includes o Cleaned up Kconfig per Sam Ravnborg's suggestions to fix build break on archs that don't have kretprobes o Implemented suggestions by Mathieu Desnoyers on CONFIG_KRETPROBES o Included Andrew Morton's cleanup based on x86-git o Modified kretprobe_example to act as a arch-agnostic module to determine routine execution times: Use 'modprobe kretprobe_example func=<func_name>' to determine execution time of func_name in nanoseconds. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Acked-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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