BMC/Intel-BMC/linux.git/arch/xtensa/include/asm/ftrace.h, branch dev

ftrace: Make CALLER_ADDRx macros more generic

2014-05-21T07:10:32+00:00

Most archs with HAVE_ARCH_CALLER_ADDR have pretty much the same definitions of CALLER_ADDRx(n). Instead of duplicating the code for all the archs, define a ftrace_return_address0() and ftrace_return_address(n) that can be overwritten by the archs if they need to do something different. Instead of 7 macros in every arch, we now only have at most 2 (and actually only 1 as ftrace_return_address0() should be the same for all archs). The CALLER_ADDRx(n) will now be defined in linux/ftrace.h and use the ftrace_return_address*(n?) macros. This removes a lot of the duplicate code. Link: http://lkml.kernel.org/p/1400585464-30333-1-git-send-email-takahiro.akashi@linaro.org Signed-off-by: AKASHI Takahiro Signed-off-by: Steven Rostedt

xtensa: remove trailing colons in asm statement

2014-01-14T18:19:48+00:00

Signed-off-by: Max Filippov Signed-off-by: Chris Zankel

xtensa: add static function tracer support

2013-07-08T08:18:57+00:00

Signed-off-by: Max Filippov Signed-off-by: Chris Zankel

xtensa: provide custom CALLER_ADDR* implementations

2013-05-09T08:07:10+00:00

Definition of CALLER_ADDR* through __builtin_return_address makes compiler insert calls to __xtensa_libgcc_window_spill, which in turn makes fast_syscall_spill_registers syscall that clobbers registers when called from the kernel mode, leading to invalid opcode exceptions on return to userspace. Provide definition for CALLER_ADDR0 as MAKE_PC_FROM_RA(a0, a1) and in case CONFIG_FRAME_POINTER is enabled extract CALLER_ADDR{1-3} from stack. Signed-off-by: Max Filippov Signed-off-by: Chris Zankel

tracing: make CALLER_ADDRx overwriteable

2009-03-02T21:49:37+00:00

The current definition of CALLER_ADDRx isn't suitable for all platforms. E.g. for ARM __builtin_return_address(N) doesn't work for N > 0 and AFAIK for powerpc there are no frame pointers needed to have a working __builtin_return_address. This patch allows defining the CALLER_ADDRx macros in and let these take precedence. Because now is included unconditionally in all archs that don't already had this include get an empty one for free. Signed-off-by: Uwe Kleine-Koenig Cc: Peter Zijlstra Cc: Ingo Molnar Reviewed-by: KOSAKI Motohiro Signed-off-by: Steven Rostedt