Messages in this thread | | | Date | Fri, 19 Jun 2015 09:26:25 -0400 | From | Steven Rostedt <> | Subject | Re: [RESEND PATCH 1/4] ppc64 FTRACE_WITH_REGS implementation |
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On Thu, 18 Jun 2015 18:21:07 +0200 Torsten Duwe <duwe@lst.de> wrote:
> Implement FTRACE_WITH_REGS for powerpc64, on ELF ABI v2. > Initial work started by Vojtech Pavlik, used with permission. > > * arch/powerpc/kernel/entry_64.S: > - enhance _mcount with a stub to test (ftrace_trace_function == &ftrace_stub) > as suggested in Documentation/trace/ftrace-design.txt > (for reference only, patched out at runtime) > - Implement an effective ftrace_caller that works from within the kernel > binary as well as from modules. > * arch/powerpc/kernel/ftrace.c: > - be prepared to deal with ppc64 ELV ABI v2, especially calls to _mcount > that result from gcc -mprofile-kernel > * arch/powerpc/kernel/module_64.c: > - do not save the TOC pointer on the trampoline when the destination > is ftrace_caller. This trampoline jump happens from a function prologue > before a new stack frame is set up, so bad things may happen otherwise... > - relax is_module_trampoline() to recognise the modified trampoline. > > Signed-off-by: Torsten Duwe <duwe@suse.de> > --
FYI, the standard notation after the change log is '---' not '--'. That way git will chop off this from the change log. When I did a git am -s on this patch I had:
Signed-off-by: Torsten Duwe <duwe@suse.de> -- arch/powerpc/include/asm/ftrace.h | 5 + arch/powerpc/kernel/entry_64.S | 112 +++++++++++++++++++++++++++++++------- arch/powerpc/kernel/ftrace.c | 67 ++++++++++++++++++++-- arch/powerpc/kernel/module_64.c | 33 ++++++++++- 4 files changed, 186 insertions(+), 31 deletions(-) -- Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
-- Steve
> arch/powerpc/include/asm/ftrace.h | 5 + > arch/powerpc/kernel/entry_64.S | 112 +++++++++++++++++++++++++++++++------- > arch/powerpc/kernel/ftrace.c | 67 ++++++++++++++++++++-- > arch/powerpc/kernel/module_64.c | 33 ++++++++++- > 4 files changed, 186 insertions(+), 31 deletions(-) > -- > diff --git a/arch/powerpc/include/asm/ftrace.h b/arch/powerpc/include/asm/ftrace.h > index e366187..6111191 100644 > --- a/arch/powerpc/include/asm/ftrace.h > +++ b/arch/powerpc/include/asm/ftrace.h -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in Please read the FAQ at http://www.tux.org/lkml/
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