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Message-Id: <20241108234606.429459-12-irogers@google.com>
Date: Fri, 8 Nov 2024 15:45:56 -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 11/20] perf loongarch: Remove dwarf-regs.c
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
the function can never be called. So remove as dead code. Tidy up the
EM_NONE cases for loongarch in dwarf-regs.c.
Reviewed-by: Masami Hiramatsu (Google) <mhiramat@...nel.org>
Signed-off-by: Ian Rogers <irogers@...gle.com>
---
tools/perf/arch/loongarch/util/Build | 1 -
tools/perf/arch/loongarch/util/dwarf-regs.c | 34 ---------------------
tools/perf/util/dwarf-regs.c | 4 +--
tools/perf/util/include/dwarf-regs.h | 3 +-
4 files changed, 4 insertions(+), 38 deletions(-)
delete mode 100644 tools/perf/arch/loongarch/util/dwarf-regs.c
diff --git a/tools/perf/arch/loongarch/util/Build b/tools/perf/arch/loongarch/util/Build
index 06ff95394921..0aa31986ecb5 100644
--- a/tools/perf/arch/loongarch/util/Build
+++ b/tools/perf/arch/loongarch/util/Build
@@ -1,7 +1,6 @@
perf-util-y += header.o
perf-util-y += perf_regs.o
-perf-util-$(CONFIG_LIBDW) += dwarf-regs.o
perf-util-$(CONFIG_LOCAL_LIBUNWIND) += unwind-libunwind.o
perf-util-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o
perf-util-$(CONFIG_LIBTRACEEVENT) += kvm-stat.o
diff --git a/tools/perf/arch/loongarch/util/dwarf-regs.c b/tools/perf/arch/loongarch/util/dwarf-regs.c
deleted file mode 100644
index bee08fdcf2fd..000000000000
--- a/tools/perf/arch/loongarch/util/dwarf-regs.c
+++ /dev/null
@@ -1,34 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * dwarf-regs.c : Mapping of DWARF debug register numbers into register names.
- *
- * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
- */
-
-#include <stdio.h>
-#include <errno.h> /* for EINVAL */
-#include <string.h> /* for strcmp */
-#include <dwarf-regs.h>
-
-struct pt_regs_dwarfnum {
- const char *name;
- unsigned int dwarfnum;
-};
-
-static struct pt_regs_dwarfnum loongarch_gpr_table[] = {
- {"%r0", 0}, {"%r1", 1}, {"%r2", 2}, {"%r3", 3},
- {"%r4", 4}, {"%r5", 5}, {"%r6", 6}, {"%r7", 7},
- {"%r8", 8}, {"%r9", 9}, {"%r10", 10}, {"%r11", 11},
- {"%r12", 12}, {"%r13", 13}, {"%r14", 14}, {"%r15", 15},
- {"%r16", 16}, {"%r17", 17}, {"%r18", 18}, {"%r19", 19},
- {"%r20", 20}, {"%r21", 21}, {"%r22", 22}, {"%r23", 23},
- {"%r24", 24}, {"%r25", 25}, {"%r26", 26}, {"%r27", 27},
- {"%r28", 28}, {"%r29", 29}, {"%r30", 30}, {"%r31", 31},
- {NULL, 0}
-};
-
-const char *get_arch_regstr(unsigned int n)
-{
- n %= 32;
- return loongarch_gpr_table[n].name;
-}
diff --git a/tools/perf/util/dwarf-regs.c b/tools/perf/util/dwarf-regs.c
index 9a76f83af62c..efc41d0fbee9 100644
--- a/tools/perf/util/dwarf-regs.c
+++ b/tools/perf/util/dwarf-regs.c
@@ -32,7 +32,7 @@
const char *get_dwarf_regstr(unsigned int n, unsigned int machine, unsigned int flags)
{
#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_CSKY || EM_HOST == EM_LOONGARCH
if (machine == EM_NONE) {
/* Generic arch - use host arch */
machine = EM_HOST;
@@ -40,7 +40,7 @@ const char *get_dwarf_regstr(unsigned int n, unsigned int machine, unsigned int
#endif
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_CSKY && EM_HOST != EM_LOONGARCH
case EM_NONE: /* Generic arch - use host arch */
return get_arch_regstr(n);
#endif
diff --git a/tools/perf/util/include/dwarf-regs.h b/tools/perf/util/include/dwarf-regs.h
index 0641c2942b01..4e591379f367 100644
--- a/tools/perf/util/include/dwarf-regs.h
+++ b/tools/perf/util/include/dwarf-regs.h
@@ -89,7 +89,8 @@
#define DWARF_REG_FB 0xd3affb /* random number */
#ifdef HAVE_LIBDW_SUPPORT
-#if !defined(__x86_64__) && !defined(__i386__) && !defined(__aarch64__) && !defined(__arm__)
+#if !defined(__x86_64__) && !defined(__i386__) && !defined(__aarch64__) && !defined(__arm__) \
+ && !defined(__loongarch__)
const char *get_arch_regstr(unsigned int n);
#endif
--
2.47.0.277.g8800431eea-goog
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