These patches add the required mappings to use perf probe on PowerPC. Functionality wise it requires the patch titled "powerpc: Add kprobe-based event tracer" from the powerpc-next tree to provide the HAVE_REGS_AND_STACK_ACCESS_API required for CONFIG_KPROBE_EVENT. The code will still compile cleanly without it and will fail gracefully at runtime on the missing CONFIG_KPROBE_EVENT support as before.
Part 1 of the patch series moves the arch dependent x86 32 and 64 bit DWARF register number mappings out into a separate arch directory and adds the necessary Makefile foo to use it. Part 2 of the patch series adds the PowerPC mappings. Changes since v1: From Masami Hiramatsu's suggestion, I added a check in the Makefile for if the arch specific Makefile defines PERF_HAVE_DWARF_REGS, printing a message during build if it has not. This simplifies the code removing the odd macro from the previous version and the need for an arch specific arch_dwarf-regs.h. I have not entirely disabled DWARF support for architectures that don't implement the register mappings, so that they can still add a probe based on a line number (they will be missing the ability to capture the value of a variable from a register). Thanks, -Ian _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
