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perf arm64: Remove dwarf-regs.c

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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 arm64 in dwarf-regs.c.

Reviewed-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Cc: Anup Patel <anup@brainfault.org>
Cc: Yang Jihong <yangjihong@bytedance.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Shenlin Liang <liangshenlin@eswincomputing.com>
Cc: Nick Terrell <terrelln@fb.com>
Cc: Guilherme Amadio <amadio@gentoo.org>
Cc: Steinar H. Gunderson <sesse@google.com>
Cc: Changbin Du <changbin.du@huawei.com>
Cc: Alexander Lobakin <aleksander.lobakin@intel.com>
Cc: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Guo Ren <guoren@kernel.org>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Will Deacon <will@kernel.org>
Cc: James Clark <james.clark@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Chen Pei <cp0613@linux.alibaba.com>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: Oliver Upton <oliver.upton@linux.dev>
Cc: Aditya Gupta <adityag@linux.ibm.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-riscv@lists.infradead.org
Cc: Bibo Mao <maobibo@loongson.cn>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Atish Patra <atishp@rivosinc.com>
Cc: Dima Kogan <dima@secretsauce.net>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Dr. David Alan Gilbert <linux@treblig.org>
Cc: linux-csky@vger.kernel.org
Link: https://lore.kernel.org/r/20241108234606.429459-9-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
This commit is contained in:
Ian Rogers 2024-11-08 15:45:53 -08:00 committed by Namhyung Kim
parent bf4e799a0a
commit 6f8e8add5a
4 changed files with 3 additions and 84 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
tools/perf/arch/arm64/util/Build
View File

@ -4,7 +4,6 @@ perf-util-y += perf_regs.o
perf-util-y += tsc.o
perf-util-y += pmu.o
perf-util-$(CONFIG_LIBTRACEEVENT) += kvm-stat.o
perf-util-$(CONFIG_LIBDW) += dwarf-regs.o
perf-util-$(CONFIG_LOCAL_LIBUNWIND) += unwind-libunwind.o
perf-util-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o

80
tools/perf/arch/arm64/util/dwarf-regs.c
View File

@ -1,80 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Mapping of DWARF debug register numbers into register names.
*
* Copyright (C) 2010 Will Deacon, ARM Ltd.
*/
#include <errno.h>
#include <stddef.h>
#include <string.h>
#include <dwarf-regs.h>
#include <linux/stringify.h>
struct regs_dwarfnum {
const char *name;
unsigned int dwarfnum;
};
#define REG_DWARFNUM_NAME(r, num) {.name = r, .dwarfnum = num}
#define GPR_DWARFNUM_NAME(num) \
{.name = __stringify(%x##num), .dwarfnum = num}
#define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0}
/*
* Reference:
* http://infocenter.arm.com/help/topic/com.arm.doc.ihi0057b/IHI0057B_aadwarf64.pdf
*/
static const struct regs_dwarfnum regdwarfnum_table[] = {
GPR_DWARFNUM_NAME(0),
GPR_DWARFNUM_NAME(1),
GPR_DWARFNUM_NAME(2),
GPR_DWARFNUM_NAME(3),
GPR_DWARFNUM_NAME(4),
GPR_DWARFNUM_NAME(5),
GPR_DWARFNUM_NAME(6),
GPR_DWARFNUM_NAME(7),
GPR_DWARFNUM_NAME(8),
GPR_DWARFNUM_NAME(9),
GPR_DWARFNUM_NAME(10),
GPR_DWARFNUM_NAME(11),
GPR_DWARFNUM_NAME(12),
GPR_DWARFNUM_NAME(13),
GPR_DWARFNUM_NAME(14),
GPR_DWARFNUM_NAME(15),
GPR_DWARFNUM_NAME(16),
GPR_DWARFNUM_NAME(17),
GPR_DWARFNUM_NAME(18),
GPR_DWARFNUM_NAME(19),
GPR_DWARFNUM_NAME(20),
GPR_DWARFNUM_NAME(21),
GPR_DWARFNUM_NAME(22),
GPR_DWARFNUM_NAME(23),
GPR_DWARFNUM_NAME(24),
GPR_DWARFNUM_NAME(25),
GPR_DWARFNUM_NAME(26),
GPR_DWARFNUM_NAME(27),
GPR_DWARFNUM_NAME(28),
GPR_DWARFNUM_NAME(29),
REG_DWARFNUM_NAME("%lr", 30),
REG_DWARFNUM_NAME("%sp", 31),
REG_DWARFNUM_END,
};
/**
* get_arch_regstr() - lookup register name from it's DWARF register number
* @n: the DWARF register number
*
* get_arch_regstr() returns the name of the register in struct
* regdwarfnum_table from it's DWARF register number. If the register is not
* found in the table, this returns NULL;
*/
const char *get_arch_regstr(unsigned int n)
{
const struct regs_dwarfnum *roff;
for (roff = regdwarfnum_table; roff->name != NULL; roff++)
if (roff->dwarfnum == n)
return roff->name;
return NULL;
}

4
tools/perf/util/dwarf-regs.c
View File

@ -32,14 +32,14 @@
const char *get_dwarf_regstr(unsigned int n, unsigned int machine,
unsigned int flags __maybe_unused)
{
#if EM_HOST == EM_X86_64 || EM_HOST == EM_386
#if EM_HOST == EM_X86_64 || EM_HOST == EM_386 || EM_HOST == EM_AARCH64
if (machine == EM_NONE) {
/* Generic arch - use host arch */
machine = EM_HOST;
}
#endif
switch (machine) {
#if EM_HOST != EM_X86_64 && EM_HOST != EM_386
#if EM_HOST != EM_X86_64 && EM_HOST != EM_386 && EM_HOST != EM_AARCH64
case EM_NONE: /* Generic arch - use host arch */
return get_arch_regstr(n);
#endif

2
tools/perf/util/include/dwarf-regs.h
View File

@ -89,7 +89,7 @@
#define DWARF_REG_FB 0xd3affb /* random number */
#ifdef HAVE_LIBDW_SUPPORT
#if !defined(__x86_64__) && !defined(__i386__)
#if !defined(__x86_64__) && !defined(__i386__) && !defined(__aarch64__)
const char *get_arch_regstr(unsigned int n);
#endif