[PATCH v3 12/20] perf mips: Remove dwarf-regs.c

Ian Rogers
2024-10-17T00:57:58Z

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 mips in dwarf-regs.c.

Signed-off-by: Ian Rogers <irogers@google.com>
---
tools/perf/arch/mips/util/Build | 1 -
tools/perf/arch/mips/util/dwarf-regs.c | 38 --------------------------
tools/perf/util/dwarf-regs.c | 4 +--
tools/perf/util/include/dwarf-regs.h | 2 +-
4 files changed, 3 insertions(+), 42 deletions(-)
delete mode 100644 tools/perf/arch/mips/util/dwarf-regs.c

diff --git a/tools/perf/arch/mips/util/Build b/tools/perf/arch/mips/util/Build
index b328109fc16c..691fa2051958 100644
--- a/tools/perf/arch/mips/util/Build
+++ b/tools/perf/arch/mips/util/Build
@@ -1,3 +1,2 @@
perf-util-y += perf_regs.o
-perf-util-$(CONFIG_LIBDW) += dwarf-regs.o
perf-util-$(CONFIG_LOCAL_LIBUNWIND) += unwind-libunwind.o
diff --git a/tools/perf/arch/mips/util/dwarf-regs.c b/tools/perf/arch/mips/util/dwarf-regs.c
deleted file mode 100644
index 25c13a91c2a7..000000000000
--- a/tools/perf/arch/mips/util/dwarf-regs.c
+++ /dev/null
@@ -1,38 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * dwarf-regs.c : Mapping of DWARF debug register numbers into register names.
- *
- * Copyright (C) 2013 Cavium, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-
-#include <stdio.h>
-#include <dwarf-regs.h>
-
-static const char *mips_gpr_names[32] = {
- "$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9",
- "$10", "$11", "$12", "$13", "$14", "$15", "$16", "$17", "$18", "$19",
- "$20", "$21", "$22", "$23", "$24", "$25", "$26", "$27", "$28", "$29",
- "$30", "$31"
-};
-
-const char *get_arch_regstr(unsigned int n)
-{
- if (n < 32)
- return mips_gpr_names[n];
- if (n == 64)
- return "hi";
- if (n == 65)
- return "lo";
- return NULL;
-}
diff --git a/tools/perf/util/dwarf-regs.c b/tools/perf/util/dwarf-regs.c
index efc41d0fbee9..d536964df43c 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_LOONGARCH
+ || EM_HOST == EM_CSKY || EM_HOST == EM_LOONGARCH || EM_HOST == EM_MIPS
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_LOONGARCH
+ && EM_HOST != EM_CSKY && EM_HOST != EM_LOONGARCH && EM_HOST != EM_MIPS
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 4f205a58db89..1f771b635789 100644
--- a/tools/perf/util/include/dwarf-regs.h
+++ b/tools/perf/util/include/dwarf-regs.h
@@ -80,7 +80,7 @@

#ifdef HAVE_LIBDW_SUPPORT
#if !defined(__x86_64__) && !defined(__i386__) && !defined(__aarch64__) && !defined(__arm__) \
- && !defined(__loongarch__)
+ && !defined(__loongarch__) && !defined(__mips__)
const char *get_arch_regstr(unsigned int n);
#endif