- 24 8月, 2016 1 次提交
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由 Josh Poimboeuf 提交于
Storing this value will help prevent unwinders from getting out of sync with the function graph tracer ret_stack. Now instead of needing a stateful iterator, they can compare the return address pointer to find the right ret_stack entry. Note that an array of 50 ftrace_ret_stack structs is allocated for every task. So when an arch implements this, it will add either 200 or 400 bytes of memory usage per task (depending on whether it's a 32-bit or 64-bit platform). Signed-off-by: NJosh Poimboeuf <jpoimboe@redhat.com> Acked-by: NSteven Rostedt <rostedt@goodmis.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Byungchul Park <byungchul.park@lge.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Nilay Vaish <nilayvaish@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/a95cfcc39e8f26b89a430c56926af0bb217bc0a1.1471607358.git.jpoimboe@redhat.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
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- 05 1月, 2016 2 次提交
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由 Zhigang Lu 提交于
Add the arch-specific code to support jump label for TILE-Gx. This code shares NOP instruction with ftrace, so we move it to a common header file. Reviewed-by: NChris Metcalf <cmetcalf@ezchip.com> Signed-off-by: NZhigang Lu <zlu@ezchip.com> Signed-off-by: NChris Metcalf <cmetcalf@ezchip.com>
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由 Zhigang Lu 提交于
It is used by kgdb, ftrace, kprobe and jump label, so we factor this out into a helper routine. Reviewed-by: NChris Metcalf <cmetcalf@ezchip.com> Signed-off-by: NZhigang Lu <zlu@ezchip.com> Signed-off-by: NChris Metcalf <cmetcalf@ezchip.com>
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- 18 4月, 2015 1 次提交
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由 Tony Lu 提交于
- Add support for ARCH_SUPPORTS_FTRACE_OPS - Replace the instruction in ftrace_call with the bundle {move r10, lr; jal ftrace_stub}, so that the lr contains the right value after returning from ftrace_stub. An alternative fix might be to leave the instruction in ftrace_call alone when it is being updated with ftrace_stub. Signed-off-by: NTony Lu <zlu@ezchip.com> Signed-off-by: NChris Metcalf <cmetcalf@ezchip.com>
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- 07 3月, 2014 2 次提交
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由 Jiri Slaby 提交于
As the data parameter is not really used by any ftrace_dyn_arch_init, remove that from ftrace_dyn_arch_init. This also removes the addr local variable from ftrace_init which is now unused. Note the documentation was imprecise as it did not suggest to set (*data) to 0. Link: http://lkml.kernel.org/r/1393268401-24379-4-git-send-email-jslaby@suse.cz Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: linux-arch@vger.kernel.org Signed-off-by: NJiri Slaby <jslaby@suse.cz> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 Jiri Slaby 提交于
No architecture uses the "data" parameter in ftrace_dyn_arch_init() in any way, it just sets the value to 0. And this is used as a return value in the caller -- ftrace_init, which just checks the retval against zero. Note there is also "return 0" in every ftrace_dyn_arch_init. So it is enough to check the retval and remove all the indirect sets of data on all archs. Link: http://lkml.kernel.org/r/1393268401-24379-3-git-send-email-jslaby@suse.cz Cc: linux-arch@vger.kernel.org Signed-off-by: NJiri Slaby <jslaby@suse.cz> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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- 30 8月, 2013 1 次提交
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由 Tony Lu 提交于
This commit adds support for static ftrace, graph function support, and dynamic tracer support. Signed-off-by: NTony Lu <zlu@tilera.com> Signed-off-by: NChris Metcalf <cmetcalf@tilera.com>
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