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Message-Id: <20241108234606.429459-15-irogers@google.com>
Date: Fri, 8 Nov 2024 15:45:59 -0800
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>,
Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>,
Kan Liang <kan.liang@...ux.intel.com>, John Garry <john.g.garry@...cle.com>,
Will Deacon <will@...nel.org>, James Clark <james.clark@...aro.org>,
Mike Leach <mike.leach@...aro.org>, Leo Yan <leo.yan@...ux.dev>, Guo Ren <guoren@...nel.org>,
Paul Walmsley <paul.walmsley@...ive.com>, Palmer Dabbelt <palmer@...belt.com>,
Albert Ou <aou@...s.berkeley.edu>, Nick Terrell <terrelln@...com>,
"Masami Hiramatsu (Google)" <mhiramat@...nel.org>, Changbin Du <changbin.du@...wei.com>,
Guilherme Amadio <amadio@...too.org>, Yang Jihong <yangjihong@...edance.com>,
Aditya Gupta <adityag@...ux.ibm.com>, Athira Rajeev <atrajeev@...ux.vnet.ibm.com>,
Masahiro Yamada <masahiroy@...nel.org>, Bibo Mao <maobibo@...ngson.cn>,
Huacai Chen <chenhuacai@...nel.org>, Kajol Jain <kjain@...ux.ibm.com>,
Atish Patra <atishp@...osinc.com>, Shenlin Liang <liangshenlin@...incomputing.com>,
Anup Patel <anup@...infault.org>, Oliver Upton <oliver.upton@...ux.dev>,
"Steinar H. Gunderson" <sesse@...gle.com>, "Dr. David Alan Gilbert" <linux@...blig.org>,
Chen Pei <cp0613@...ux.alibaba.com>, Dima Kogan <dima@...retsauce.net>,
Przemek Kitszel <przemyslaw.kitszel@...el.com>, "David S. Miller" <davem@...emloft.net>,
Alexander Lobakin <aleksander.lobakin@...el.com>, linux-kernel@...r.kernel.org,
linux-perf-users@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-csky@...r.kernel.org, linux-riscv@...ts.infradead.org
Subject: [PATCH v4 14/20] perf riscv: Remove dwarf-regs.c and add dwarf-regs-table.h
The file just provides the function get_arch_regstr, however, if in
the only caller get_dwarf_regstr EM_HOST is used for the EM_NONE case,
and the register table is provided in a header file, the function can
never be called. So remove as dead code. Tidy up the EM_NONE cases for
riscv in dwarf-regs.c.
Reviewed-by: Masami Hiramatsu (Google) <mhiramat@...nel.org>
Signed-off-by: Ian Rogers <irogers@...gle.com>
---
.../dwarf-regs-table.h} | 32 ++++---------------
tools/perf/arch/riscv/util/Build | 1 -
tools/perf/util/dwarf-regs.c | 7 ++--
tools/perf/util/include/dwarf-regs.h | 2 +-
4 files changed, 12 insertions(+), 30 deletions(-)
rename tools/perf/arch/riscv/{util/dwarf-regs.c => include/dwarf-regs-table.h} (56%)
diff --git a/tools/perf/arch/riscv/util/dwarf-regs.c b/tools/perf/arch/riscv/include/dwarf-regs-table.h
similarity index 56%
rename from tools/perf/arch/riscv/util/dwarf-regs.c
rename to tools/perf/arch/riscv/include/dwarf-regs-table.h
index a9c4402ae57e..a45b63a6d5a8 100644
--- a/tools/perf/arch/riscv/util/dwarf-regs.c
+++ b/tools/perf/arch/riscv/include/dwarf-regs-table.h
@@ -1,23 +1,10 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd.
- * Mapping of DWARF debug register numbers into register names.
- */
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifdef DEFINE_DWARF_REGSTR_TABLE
+/* This is included in perf/util/dwarf-regs.c */
-#include <stddef.h>
-#include <errno.h> /* for EINVAL */
-#include <string.h> /* for strcmp */
-#include <dwarf-regs.h>
+#define REG_DWARFNUM_NAME(reg, idx) [idx] = "%" #reg
-struct regs_dwarfnum {
- const char *name;
- unsigned int dwarfnum;
-};
-
-#define REG_DWARFNUM_NAME(r, num) {.name = r, .dwarfnum = num}
-#define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0}
-
-struct regs_dwarfnum riscv_dwarf_regs_table[] = {
+static const char * const riscv_regstr_tbl[] = {
REG_DWARFNUM_NAME("%zero", 0),
REG_DWARFNUM_NAME("%ra", 1),
REG_DWARFNUM_NAME("%sp", 2),
@@ -50,13 +37,6 @@ struct regs_dwarfnum riscv_dwarf_regs_table[] = {
REG_DWARFNUM_NAME("%t4", 29),
REG_DWARFNUM_NAME("%t5", 30),
REG_DWARFNUM_NAME("%t6", 31),
- REG_DWARFNUM_END,
};
-#define RISCV_MAX_REGS ((sizeof(riscv_dwarf_regs_table) / \
- sizeof(riscv_dwarf_regs_table[0])) - 1)
-
-const char *get_arch_regstr(unsigned int n)
-{
- return (n < RISCV_MAX_REGS) ? riscv_dwarf_regs_table[n].name : NULL;
-}
+#endif
diff --git a/tools/perf/arch/riscv/util/Build b/tools/perf/arch/riscv/util/Build
index 8f93091b8345..58a672246024 100644
--- a/tools/perf/arch/riscv/util/Build
+++ b/tools/perf/arch/riscv/util/Build
@@ -2,5 +2,4 @@ perf-util-y += perf_regs.o
perf-util-y += header.o
perf-util-$(CONFIG_LIBTRACEEVENT) += kvm-stat.o
-perf-util-$(CONFIG_LIBDW) += dwarf-regs.o
perf-util-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o
diff --git a/tools/perf/util/dwarf-regs.c b/tools/perf/util/dwarf-regs.c
index 3d98c2bf6035..2c6b197556dd 100644
--- a/tools/perf/util/dwarf-regs.c
+++ b/tools/perf/util/dwarf-regs.c
@@ -20,6 +20,7 @@
#include "../arch/arm64/include/dwarf-regs-table.h"
#include "../arch/sh/include/dwarf-regs-table.h"
#include "../arch/powerpc/include/dwarf-regs-table.h"
+#include "../arch/riscv/include/dwarf-regs-table.h"
#include "../arch/s390/include/dwarf-regs-table.h"
#include "../arch/sparc/include/dwarf-regs-table.h"
#include "../arch/xtensa/include/dwarf-regs-table.h"
@@ -33,7 +34,7 @@ const char *get_dwarf_regstr(unsigned int n, unsigned int machine, unsigned int
{
#if EM_HOST == EM_X86_64 || EM_HOST == EM_386 || EM_HOST == EM_AARCH64 || EM_HOST == EM_ARM \
|| EM_HOST == EM_CSKY || EM_HOST == EM_LOONGARCH || EM_HOST == EM_MIPS || EM_HOST == EM_PPC \
- || EM_HOST == EM_PPC64
+ || EM_HOST == EM_PPC64 || EM_HOST == EM_RISCV
if (machine == EM_NONE) {
/* Generic arch - use host arch */
machine = EM_HOST;
@@ -42,7 +43,7 @@ const char *get_dwarf_regstr(unsigned int n, unsigned int machine, unsigned int
switch (machine) {
#if EM_HOST != EM_X86_64 && EM_HOST != EM_386 && EM_HOST != EM_AARCH64 && EM_HOST != EM_ARM \
&& EM_HOST != EM_CSKY && EM_HOST != EM_LOONGARCH && EM_HOST != EM_MIPS && EM_HOST != EM_PPC \
- && EM_HOST != EM_PPC64
+ && EM_HOST != EM_PPC64 && EM_HOST != EM_RISCV
case EM_NONE: /* Generic arch - use host arch */
return get_arch_regstr(n);
#endif
@@ -63,6 +64,8 @@ const char *get_dwarf_regstr(unsigned int n, unsigned int machine, unsigned int
case EM_PPC:
case EM_PPC64:
return __get_dwarf_regstr(powerpc_regstr_tbl, n);
+ case EM_RISCV:
+ return __get_dwarf_regstr(riscv_regstr_tbl, n);
case EM_SPARC:
case EM_SPARCV9:
return __get_dwarf_regstr(sparc_regstr_tbl, n);
diff --git a/tools/perf/util/include/dwarf-regs.h b/tools/perf/util/include/dwarf-regs.h
index e47c4697da36..28075de8bcf4 100644
--- a/tools/perf/util/include/dwarf-regs.h
+++ b/tools/perf/util/include/dwarf-regs.h
@@ -91,7 +91,7 @@
#ifdef HAVE_LIBDW_SUPPORT
#if !defined(__x86_64__) && !defined(__i386__) && !defined(__aarch64__) && !defined(__arm__) \
&& !defined(__loongarch__) && !defined(__mips__) && !defined(__powerpc__) \
- && !defined(__powerpc64__)
+ && !defined(__powerpc64__) && !defined(__riscv__)
const char *get_arch_regstr(unsigned int n);
#endif
--
2.47.0.277.g8800431eea-goog
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