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* [ARM] 5613/1: implement CALLER_ADDRESSxUwe Kleine-König2009-07-211-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> As __builtin_return_address(n) doesn't work for ARM with n > 0, the kernel needs its own implementation. This fixes many warnings saying: warning: unsupported argument to '__builtin_return_address' The new methods and walk_stackframe must not be instrumented because CALLER_ADDRESSx is used in the various tracers and tracing the tracer is a bad idea. What's currently missing is an implementation using unwind tables. This is not fatal though, it's just that the tracers don't get enough information to be really useful. Note that if both ARM_UNWIND and FRAME_POINTER are enabled, walk_stackframe uses unwind information. So in this case the same implementation is used as when FRAME_POINTER is disabled. Cc: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 5382/1: unwind: Reorganise the stacktrace supportCatalin Marinas2009-02-121-28/+60
| | | | | | | | | This patch changes the walk_stacktrace and its callers for easier integration of stack unwinding. The arch/arm/kernel/stacktrace.h file is also moved to arch/arm/include/asm/stacktrace.h. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* Merge branch 'core/stacktrace' of ↵Linus Torvalds2008-07-151-0/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'core/stacktrace' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: generic-ipi: powerpc/generic-ipi tree build failure stacktrace: fix build failure on sparc64 stacktrace: export save_stack_trace[_tsk] stacktrace: fix modular build, export print_stack_trace and save_stack_trace backtrace: replace timer with tasklet + completions stacktrace: add saved stack traces to backtrace self-test stacktrace: print_stack_trace() cleanup debugging: make stacktrace independent from DEBUG_KERNEL stacktrace: don't crash on invalid stack trace structs
| * stacktrace: export save_stack_trace[_tsk]Ingo Molnar2008-07-031-0/+1
| | | | | | | | | | | | | | | | | | Andrew Morton reported this against linux-next: ERROR: ".save_stack_trace" [tests/backtracetest.ko] undefined! Reported-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | [ARM] latencytop supportNicolas Pitre2008-06-221-4/+30
|/ | | | | | | | | | | | | | Available for !SMP only at the moment. From Russell: |Basically, if a thread is running on a CPU, thread_saved_fp() is invalid. |So, the question is: what guarantees do we have here that 'tsk' is not |running on another CPU? Signed-off-by: Nicolas Pitre <nico@marvell.com> Tested-by: Lennert Buytenhek <buytenh@marvell.com> Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
* [ARM] Fix stacktrace FP range checkingRussell King2007-05-301-1/+1
| | | | | | | | | Fix an oops in the stacktrace code, caused by improper range checking. We subtract 12 off 'fp' before testing to see if it's below the low bound. However, if 'fp' were zero before, it becomes a very large positive number, causing this test to succeed where it should fail. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* arm: walk_stacktrace() needs to be exportedAl Viro2007-05-151-0/+2
| | | | | | | oprofile depends on having it Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [ARM] stacktrace fixAndrew Morton2007-05-111-9/+3
| | | | | | | | | | | | | | | | | ab1b6f03a10ba1f5638188ab06bf46e33ac3a160 said - remove the unused task argument to save_stack_trace, it's always current then broke arm: arch/arm/kernel/stacktrace.c:56: error: conflicting types for 'save_stack_trace' include/linux/stacktrace.h:11: error: previous declaration of 'save_stack_trace' was here arch/arm/kernel/stacktrace.c:56: error: conflicting types for 'save_stack_trace' include/linux/stacktrace.h:11: error: previous declaration of 'save_stack_trace' was here Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] Add stacktrace support and make oprofile use itRussell King2007-04-281-0/+73
Add support for stacktrace. Use the new stacktrace code with oprofile instead of it's version; there's no point having multiple versions of stacktracing in the kernel. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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