Em Thu, Feb 25, 2021 at 09:49:56AM -0300, Arnaldo Carvalho de Melo escreveu:

Em Wed, Feb 24, 2021 at 10:16:55AM -0300, Arnaldo Carvalho de Melo escreveu:

quoted

Em Mon, Feb 22, 2021 at 02:43:39PM +0800, Tiezhu Yang escreveu:

quoted

On 02/04/2021 11:35 AM, Tiezhu Yang wrote:

quoted

v2: add R26 and R27 to the enum perf_event_mips_regs in patch #1

Tiezhu Yang (3):
   MIPS: kernel: Support extracting off-line stack traces from user-space
     with perf
   perf tools: Support mips unwinding and dwarf-regs
   perf tools: Generate mips syscalls_n64.c syscall table

Hi Arnaldo,

The kernel part patch #1 has been merged.
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1ddc96bd42da

Could the perf tool patches #2 and #3 have a chance to be merged before
5.12-rc1?
If yes, we can use this feature in 5.12-rc1.

Thanks, applied, should make it into 5.12-rc1.

First we'll have to fix this problem:

  28    12.45 debian:experimental-x-mips64  : FAIL gcc version 10.2.1 20201224 (Debian 10.2.1-3)
                     from builtin-diff.c:12:
    /git/linux/tools/perf/arch/mips/include/perf_regs.h:7:10: fatal error: asm/perf_regs.h: No such file or directory
        7 | #include <asm/perf_regs.h>
          |          ^~~~~~~~~~~~~~~~~
    compilation terminated.
    In file included from util/perf_regs.h:30,
                     from util/event.h:15,
                     from util/branch.h:15,
                     from util/callchain.h:8,
                     from builtin-record.c:16:
    /git/linux/tools/perf/arch/mips/include/perf_regs.h:7:10: fatal error: asm/perf_regs.h: No such file or directory

I'm not finding it in the debian cross build packages:

root@d77a78c0aa1c:/# apt-file find perf_regs.h | grep cross
linux-libc-dev-amd64-cross: /usr/x86_64-linux-gnu/include/asm/perf_regs.h
linux-libc-dev-arm64-cross: /usr/aarch64-linux-gnu/include/asm/perf_regs.h
linux-libc-dev-armel-cross: /usr/arm-linux-gnueabi/include/asm/perf_regs.h
linux-libc-dev-armhf-cross: /usr/arm-linux-gnueabihf/include/asm/perf_regs.h
linux-libc-dev-i386-cross: /usr/i686-linux-gnu/include/asm/perf_regs.h
linux-libc-dev-powerpc-cross: /usr/powerpc-linux-gnu/include/asm/perf_regs.h
linux-libc-dev-ppc64-cross: /usr/powerpc64-linux-gnu/include/asm/perf_regs.h
linux-libc-dev-ppc64el-cross: /usr/powerpc64le-linux-gnu/include/asm/perf_regs.h
linux-libc-dev-riscv64-cross: /usr/riscv64-linux-gnu/include/asm/perf_regs.h
linux-libc-dev-s390x-cross: /usr/s390x-linux-gnu/include/asm/perf_regs.h
linux-libc-dev-x32-cross: /usr/x86_64-linux-gnux32/include/asm/perf_regs.h
root@d77a78c0aa1c:/#

Ideas?

- Arnaldo