[PATCH v3 18/20] perf xtensa: Remove dwarf-regs.c

Ian Rogers
2024-10-17T01:06:49Z

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. As this is
the only file in the arch/xtensa/util clean up Build files. Tidy up the
EM_NONE cases for xtensa in dwarf-regs.c.

Signed-off-by: Ian Rogers <irogers@google.com>
---
tools/perf/arch/xtensa/Build | 1 -
tools/perf/arch/xtensa/util/Build | 1 -
tools/perf/arch/xtensa/util/dwarf-regs.c | 21 ---------------------
tools/perf/util/dwarf-regs.c | 4 ++--
tools/perf/util/include/dwarf-regs.h | 2 +-
5 files changed, 3 insertions(+), 26 deletions(-)
delete mode 100644 tools/perf/arch/xtensa/Build
delete mode 100644 tools/perf/arch/xtensa/util/Build
delete mode 100644 tools/perf/arch/xtensa/util/dwarf-regs.c

diff --git a/tools/perf/arch/xtensa/Build b/tools/perf/arch/xtensa/Build
deleted file mode 100644
index e63eabc2c8f4..000000000000
--- a/tools/perf/arch/xtensa/Build
+++ /dev/null
@@ -1 +0,0 @@
-perf-util-y += util/
diff --git a/tools/perf/arch/xtensa/util/Build b/tools/perf/arch/xtensa/util/Build
deleted file mode 100644
index 2d1a48696ad9..000000000000
--- a/tools/perf/arch/xtensa/util/Build
+++ /dev/null
@@ -1 +0,0 @@
-perf-$(CONFIG_LIBDW) += dwarf-regs.o
diff --git a/tools/perf/arch/xtensa/util/dwarf-regs.c b/tools/perf/arch/xtensa/util/dwarf-regs.c
deleted file mode 100644
index 12f5457300f5..000000000000
--- a/tools/perf/arch/xtensa/util/dwarf-regs.c
+++ /dev/null
@@ -1,21 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Mapping of DWARF debug register numbers into register names.
- *
- * Copyright (c) 2015 Cadence Design Systems Inc.
- */
-
-#include <stddef.h>
-#include <dwarf-regs.h>
-
-#define XTENSA_MAX_REGS 16
-
-const char *xtensa_regs_table[XTENSA_MAX_REGS] = {
- "a0", "a1", "a2", "a3", "a4", "a5", "a6", "a7",
- "a8", "a9", "a10", "a11", "a12", "a13", "a14", "a15",
-};
-
-const char *get_arch_regstr(unsigned int n)
-{
- return n < XTENSA_MAX_REGS ? xtensa_regs_table[n] : NULL;
-}
diff --git a/tools/perf/util/dwarf-regs.c b/tools/perf/util/dwarf-regs.c
index a0bcc2529cb0..05fff75a8f59 100644
--- a/tools/perf/util/dwarf-regs.c
+++ b/tools/perf/util/dwarf-regs.c
@@ -35,7 +35,7 @@ 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_RISCV || EM_HOST == EM_S390 || EM_HOST == EM_SH \
- || EM_HOST == EM_SPARC || EM_HOST == EM_SPARCV9
+ || EM_HOST == EM_SPARC || EM_HOST == EM_SPARCV9 || EM_HOST == EM_XTENSA
if (machine == EM_NONE) {
/* Generic arch - use host arch */
machine = EM_HOST;
@@ -45,7 +45,7 @@ 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_RISCV && EM_HOST != EM_S390 && EM_HOST != EM_SH \
- && EM_HOST != EM_SPARC && EM_HOST != EM_SPARCV9
+ && EM_HOST != EM_SPARC && EM_HOST != EM_SPARCV9 && EM_HOST != EM_XTENSA
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 b2cf7d9e4785..9dfc9abfdddd 100644
--- a/tools/perf/util/include/dwarf-regs.h
+++ b/tools/perf/util/include/dwarf-regs.h
@@ -82,7 +82,7 @@
#if !defined(__x86_64__) && !defined(__i386__) && !defined(__aarch64__) && !defined(__arm__) \
&& !defined(__loongarch__) && !defined(__mips__) && !defined(__powerpc__) \
&& !defined(__powerpc64__) && !defined(__riscv__) && !defined(__s390x__) && !defined(__sh__) \
- && !defined(__sparc64__) && !defined(__sparc__)
+ && !defined(__sparc64__) && !defined(__sparc__) && !defined(__xtensa__)
const char *get_arch_regstr(unsigned int n);
#endif