powerpc/ppc64: ftrace, handle module trampolines for dyn ftrace

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Impact: Allow 64 bit PowerPC to trace modules with dynamic ftrace

This adds code to handle the PPC64 module trampolines, and allows for
PPC64 to use dynamic ftrace.

Thanks to Paul Mackerras for these updates:

  - fix the mod and rec->arch.mod NULL checks.
  - fix to is_bl_op compare.

Thanks to Milton Miller for:

  - finding the nasty race with using two nops, and recommending
    instead that I use a branch 8 forward.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>

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This commit is contained in:

Steven Rostedt 2008-11-14 20:47:03 -08:00

parent e4486fe316

commit f48cb8b48b

4 changed files with 293 additions and 11 deletions

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2

arch/powerpc/include/asm/ftrace.h

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11

arch/powerpc/include/asm/module.h

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296

arch/powerpc/kernel/ftrace.c

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13

arch/powerpc/kernel/module_64.c

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