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    SubjectRe: [PATCH v4 3/3] csky: Add support for libdw
    On Thu, Apr 11, 2019 at 03:45:01PM +0800, Mao Han wrote:
    > This patch add support for DWARF register mappings and libdw registers
    > initialization, which is used by perf callchain analyzing when
    > --call-graph=dwarf is given.
    >
    > CC: Peter Zijlstra <peterz@infradead.org>
    > CC: Ingo Molnar <mingo@redhat.com>
    > CC: Arnaldo Carvalho de Melo <acme@kernel.org>
    > CC: Alexander Shishkin <alexander.shishkin@linux.intel.com>
    > CC: Jiri Olsa <jolsa@redhat.com>
    > CC: Namhyung Kim <namhyung@kernel.org>
    >
    > Signed-off-by: Mao Han <han_mao@c-sky.com>
    > ---
    > tools/arch/csky/include/uapi/asm/perf_regs.h | 51 ++++++++++++++
    > tools/perf/Makefile.config | 6 +-
    > tools/perf/arch/csky/Build | 1 +
    > tools/perf/arch/csky/Makefile | 3 +
    > tools/perf/arch/csky/include/perf_regs.h | 100 +++++++++++++++++++++++++++
    > tools/perf/arch/csky/util/Build | 2 +
    > tools/perf/arch/csky/util/dwarf-regs.c | 49 +++++++++++++
    > tools/perf/arch/csky/util/unwind-libdw.c | 78 +++++++++++++++++++++
    > 8 files changed, 289 insertions(+), 1 deletion(-)
    > create mode 100644 tools/arch/csky/include/uapi/asm/perf_regs.h
    > create mode 100644 tools/perf/arch/csky/Build
    > create mode 100644 tools/perf/arch/csky/Makefile
    > create mode 100644 tools/perf/arch/csky/include/perf_regs.h
    > create mode 100644 tools/perf/arch/csky/util/Build
    > create mode 100644 tools/perf/arch/csky/util/dwarf-regs.c
    > create mode 100644 tools/perf/arch/csky/util/unwind-libdw.c
    >
    > diff --git a/tools/arch/csky/include/uapi/asm/perf_regs.h b/tools/arch/csky/include/uapi/asm/perf_regs.h
    > new file mode 100644
    > index 0000000..ee323d8
    > --- /dev/null
    > +++ b/tools/arch/csky/include/uapi/asm/perf_regs.h
    > @@ -0,0 +1,51 @@
    > +/* SPDX-License-Identifier: GPL-2.0 */
    > +// Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd.
    > +
    > +#ifndef _ASM_CSKY_PERF_REGS_H
    > +#define _ASM_CSKY_PERF_REGS_H
    > +
    > +/* Index of struct pt_regs */
    > +enum perf_event_csky_regs {
    > + PERF_REG_CSKY_TLS,
    > + PERF_REG_CSKY_LR,
    > + PERF_REG_CSKY_PC,
    > + PERF_REG_CSKY_SR,
    > + PERF_REG_CSKY_SP,
    > + PERF_REG_CSKY_ORIG_A0,
    > + PERF_REG_CSKY_A0,
    > + PERF_REG_CSKY_A1,
    > + PERF_REG_CSKY_A2,
    > + PERF_REG_CSKY_A3,
    > + PERF_REG_CSKY_REGS0,
    > + PERF_REG_CSKY_REGS1,
    > + PERF_REG_CSKY_REGS2,
    > + PERF_REG_CSKY_REGS3,
    > + PERF_REG_CSKY_REGS4,
    > + PERF_REG_CSKY_REGS5,
    > + PERF_REG_CSKY_REGS6,
    > + PERF_REG_CSKY_REGS7,
    > + PERF_REG_CSKY_REGS8,
    > + PERF_REG_CSKY_REGS9,
    > +#if defined(__CSKYABIV2__)
    > + PERF_REG_CSKY_EXREGS0,
    > + PERF_REG_CSKY_EXREGS1,
    > + PERF_REG_CSKY_EXREGS2,
    > + PERF_REG_CSKY_EXREGS3,
    > + PERF_REG_CSKY_EXREGS4,
    > + PERF_REG_CSKY_EXREGS5,
    > + PERF_REG_CSKY_EXREGS6,
    > + PERF_REG_CSKY_EXREGS7,
    > + PERF_REG_CSKY_EXREGS8,
    > + PERF_REG_CSKY_EXREGS9,
    > + PERF_REG_CSKY_EXREGS10,
    > + PERF_REG_CSKY_EXREGS11,
    > + PERF_REG_CSKY_EXREGS12,
    > + PERF_REG_CSKY_EXREGS13,
    > + PERF_REG_CSKY_EXREGS14,
    > + PERF_REG_CSKY_HI,
    > + PERF_REG_CSKY_LO,
    > + PERF_REG_CSKY_DCSR,
    > +#endif
    > + PERF_REG_CSKY_MAX,
    > +};
    > +#endif /* _ASM_CSKY_PERF_REGS_H */
    > diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
    > index fe3f97e..42985ae 100644
    > --- a/tools/perf/Makefile.config
    > +++ b/tools/perf/Makefile.config
    > @@ -59,6 +59,10 @@ ifeq ($(SRCARCH),arm64)
    > LIBUNWIND_LIBS = -lunwind -lunwind-aarch64
    > endif
    >
    > +ifeq ($(SRCARCH),csky)
    > + NO_PERF_REGS := 0
    > +endif
    > +
    > ifeq ($(ARCH),s390)
    > NO_PERF_REGS := 0
    > NO_SYSCALL_TABLE := 0
    > @@ -77,7 +81,7 @@ endif
    > # Disable it on all other architectures in case libdw unwind
    > # support is detected in system. Add supported architectures
    > # to the check.
    > -ifneq ($(SRCARCH),$(filter $(SRCARCH),x86 arm arm64 powerpc s390))
    > +ifneq ($(SRCARCH),$(filter $(SRCARCH),x86 arm arm64 powerpc s390 csky))
    > NO_LIBDW_DWARF_UNWIND := 1
    > endif
    >
    > diff --git a/tools/perf/arch/csky/Build b/tools/perf/arch/csky/Build
    > new file mode 100644
    > index 0000000..e4e5f33
    > --- /dev/null
    > +++ b/tools/perf/arch/csky/Build
    > @@ -0,0 +1 @@
    > +perf-y += util/
    > diff --git a/tools/perf/arch/csky/Makefile b/tools/perf/arch/csky/Makefile
    > new file mode 100644
    > index 0000000..7fbca17
    > --- /dev/null
    > +++ b/tools/perf/arch/csky/Makefile
    > @@ -0,0 +1,3 @@
    > +ifndef NO_DWARF
    > +PERF_HAVE_DWARF_REGS := 1
    > +endif
    > diff --git a/tools/perf/arch/csky/include/perf_regs.h b/tools/perf/arch/csky/include/perf_regs.h
    > new file mode 100644
    > index 0000000..8f336ea
    > --- /dev/null
    > +++ b/tools/perf/arch/csky/include/perf_regs.h
    > @@ -0,0 +1,100 @@
    > +/* SPDX-License-Identifier: GPL-2.0 */
    > +// Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd.
    > +
    > +#ifndef ARCH_PERF_REGS_H
    > +#define ARCH_PERF_REGS_H
    > +
    > +#include <stdlib.h>
    > +#include <linux/types.h>
    > +#include <asm/perf_regs.h>
    > +
    > +#define PERF_REGS_MASK ((1ULL << PERF_REG_CSKY_MAX) - 1)
    > +#define PERF_REGS_MAX PERF_REG_CSKY_MAX
    > +#define PERF_SAMPLE_REGS_ABI PERF_SAMPLE_REGS_ABI_32
    > +
    > +#define PERF_REG_IP PERF_REG_CSKY_PC
    > +#define PERF_REG_SP PERF_REG_CSKY_SP
    > +
    > +static inline const char *perf_reg_name(int id)
    > +{
    > + switch (id) {
    > + case PERF_REG_CSKY_A0:
    > + return "a0";
    > + case PERF_REG_CSKY_A1:
    > + return "a1";
    > + case PERF_REG_CSKY_A2:
    > + return "a2";
    > + case PERF_REG_CSKY_A3:
    > + return "a3";
    > + case PERF_REG_CSKY_REGS0:
    > + return "regs0";
    > + case PERF_REG_CSKY_REGS1:
    > + return "regs1";
    > + case PERF_REG_CSKY_REGS2:
    > + return "regs2";
    > + case PERF_REG_CSKY_REGS3:
    > + return "regs3";
    > + case PERF_REG_CSKY_REGS4:
    > + return "regs4";
    > + case PERF_REG_CSKY_REGS5:
    > + return "regs5";
    > + case PERF_REG_CSKY_REGS6:
    > + return "regs6";
    > + case PERF_REG_CSKY_REGS7:
    > + return "regs7";
    > + case PERF_REG_CSKY_REGS8:
    > + return "regs8";
    > + case PERF_REG_CSKY_REGS9:
    > + return "regs9";
    > + case PERF_REG_CSKY_SP:
    > + return "sp";
    > + case PERF_REG_CSKY_LR:
    > + return "lr";
    > + case PERF_REG_CSKY_PC:
    > + return "pc";
    > +#if defined(__CSKYABIV2__)
    > + case PERF_REG_CSKY_EXREGS0:
    > + return "exregs0";
    > + case PERF_REG_CSKY_EXREGS1:
    > + return "exregs1";
    > + case PERF_REG_CSKY_EXREGS2:
    > + return "exregs2";
    > + case PERF_REG_CSKY_EXREGS3:
    > + return "exregs3";
    > + case PERF_REG_CSKY_EXREGS4:
    > + return "exregs4";
    > + case PERF_REG_CSKY_EXREGS5:
    > + return "exregs5";
    > + case PERF_REG_CSKY_EXREGS6:
    > + return "exregs6";
    > + case PERF_REG_CSKY_EXREGS7:
    > + return "exregs7";
    > + case PERF_REG_CSKY_EXREGS8:
    > + return "exregs8";
    > + case PERF_REG_CSKY_EXREGS9:
    > + return "exregs9";
    > + case PERF_REG_CSKY_EXREGS10:
    > + return "exregs10";
    > + case PERF_REG_CSKY_EXREGS11:
    > + return "exregs11";
    > + case PERF_REG_CSKY_EXREGS12:
    > + return "exregs12";
    > + case PERF_REG_CSKY_EXREGS13:
    > + return "exregs13";
    > + case PERF_REG_CSKY_EXREGS14:
    > + return "exregs14";
    > + case PERF_REG_CSKY_TLS:
    > + return "tls";
    > + case PERF_REG_CSKY_HI:
    > + return "hi";
    > + case PERF_REG_CSKY_LO:
    > + return "lo";
    > +#endif
    > + default:
    > + return NULL;
    > + }
    > +
    > + return NULL;
    > +}
    > +
    > +#endif /* ARCH_PERF_REGS_H */
    > diff --git a/tools/perf/arch/csky/util/Build b/tools/perf/arch/csky/util/Build
    > new file mode 100644
    > index 0000000..1160bb2
    > --- /dev/null
    > +++ b/tools/perf/arch/csky/util/Build
    > @@ -0,0 +1,2 @@
    > +perf-$(CONFIG_DWARF) += dwarf-regs.o
    > +perf-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o
    > diff --git a/tools/perf/arch/csky/util/dwarf-regs.c b/tools/perf/arch/csky/util/dwarf-regs.c
    > new file mode 100644
    > index 0000000..3591ca1
    > --- /dev/null
    > +++ b/tools/perf/arch/csky/util/dwarf-regs.c
    > @@ -0,0 +1,49 @@
    > +// SPDX-License-Identifier: GPL-2.0
    > +// Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd.
    > +// Mapping of DWARF debug register numbers into register names.
    > +
    > +#include <stddef.h>
    > +#include <dwarf-regs.h>
    > +
    > +#if defined(__CSKYABIV2__)
    > +#define CSKY_MAX_REGS 71
    > +const char *csky_dwarf_regs_table[CSKY_MAX_REGS] = {
    > + /* r0 ~ r8 */
    > + "%a0", "%a1", "%a2", "%a3", "%regs0", "%regs1", "%regs2", "%regs3",
    > + /* r9 ~ r15 */
    > + "%regs4", "%regs5", "%regs6", "%regs7", "%regs8", "%regs9", "%sp",
    > + "%lr",
    > + /* r16 ~ r23 */
    > + "%exregs0", "%exregs1", "%exregs2", "%exregs3", "%exregs4",
    > + "%exregs5", "%exregs6", "%exregs7",
    > + /* r24 ~ r31 */
    > + "%exregs8", "%exregs9", "%exregs10", "%exregs11", "%exregs12",
    > + "%exregs13", "%exregs14", "%tls",
    > + "%pc", "%cc", "%hi", "%lo", NULL, NULL, NULL, NULL,
    > + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
    > + NULL, NULL, NULL, NULL, "%vr0", "%vr1", "%vr2", "%vr3",
    > + "%vr4", "%vr5", "%vr6", "%vr7", "%vr8", "%vr9", "%vr10", "%vr11",
    > + "%vr12", "%vr13", "%vr14", "%vr15", NULL, NULL, "%epc",
    Remove vr0-vr15 first.

    > +};
    > +#else
    > +#define CSKY_MAX_REGS 70
    > +const char *csky_dwarf_regs_table[CSKY_MAX_REGS] = {
    > + /* r0 ~ r8 */
    > + "%sp", "%regs9", "%a0", "%a1", "%a2", "%a3", "%regs0", "%regs1",
    > + /* r9 ~ r15 */
    > + "%regs2", "%regs3", "%regs4", "%regs5", "%regs6", "%regs7", "%regs8",
    > + "%lr",
    > + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
    > + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
    > + "%vap", "%cc", "%vfp", "%epc", "%hi", "%lo", "%fr0", "%fr1",
    > + "%fr2", "%fr3", "%fr4", "%fr5", "%fr6", "%fr7", "%fr8", "%fr9",
    > + "%fr10", "%fr11", "%fr12", "%fr13", "%fr14", "%fr15", "%fr16", "%fr17",
    > + "%fr18", "%fr19", "%fr20", "%fr21", "%fr22", "%fr23", "%fr24", "%fr25",
    > + "%fr26", "%fr27", "%fr28", "%fr29", "%fr30", "%fr31"
    Please remove vap cc vfp hi lo fr0~fr31, current abiv1 linux couldn't
    suppport them.

    Best Regards
    Guo Ren

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      Last update: 2019-04-15 08:28    [W:2.455 / U:0.132 seconds]
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