Re: [PATCH 1/1] perf jitdump: Add riscv64 support.

Eric Lin
2022-04-10T15:15:17Z

Hi Arnaldo,

On Sat, Apr 9, 2022 at 11:05 PM Arnaldo Carvalho de Melo
<acme@kernel.org> wrote:
>
> Em Wed, Apr 06, 2022 at 10:26:06PM +0800, Eric Lin escreveu:
> > Signed-off-by: Eric Lin <eric.lin@sifive.com>
>
> Can you plese provide some series of commands demonstrating the usage of
> this functionality on riscv?
>
> A dump, for instance.
>
> - Arnaldo
>

OK, I got it. I'll show the series of commands in the commit message
in v2 patch.
Thanks.

> > ---
> > tools/perf/arch/riscv/Makefile | 1 +
> > tools/perf/util/genelf.h | 3 +++
> > 2 files changed, 4 insertions(+)
> >
> > diff --git a/tools/perf/arch/riscv/Makefile b/tools/perf/arch/riscv/Makefile
> > index 1aa9dd772489..a8d25d005207 100644
> > --- a/tools/perf/arch/riscv/Makefile
> > +++ b/tools/perf/arch/riscv/Makefile
> > @@ -2,3 +2,4 @@ ifndef NO_DWARF
> > PERF_HAVE_DWARF_REGS := 1
> > endif
> > PERF_HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET := 1
> > +PERF_HAVE_JITDUMP := 1
> > diff --git a/tools/perf/util/genelf.h b/tools/perf/util/genelf.h
> > index 3db3293213a9..ae138afe6c56 100644
> > --- a/tools/perf/util/genelf.h
> > +++ b/tools/perf/util/genelf.h
> > @@ -38,6 +38,9 @@ int jit_add_debug_info(Elf *e, uint64_t code_addr, void *debug, int nr_debug_ent
> > #elif defined(__s390x__)
> > #define GEN_ELF_ARCH EM_S390
> > #define GEN_ELF_CLASS ELFCLASS64
> > +#elif defined(__riscv) && __riscv_xlen == 64
> > +#define GEN_ELF_ARCH EM_RISCV
> > +#define GEN_ELF_CLASS ELFCLASS64
> > #else
> > #error "unsupported architecture"
> > #endif
> > --
> > 2.35.1
>
> --
>
> - Arnaldo