perf tools ARM64: Wire up perf_regs and unwind support (8ab596af) · Commits · e / devices / android_kernel_oneplus_sm8150

tools/perf/arch/arm64/Makefile

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		ifndef NO_DWARF
		PERF_HAVE_DWARF_REGS := 1
		LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/dwarf-regs.o
		endif
		ifndef NO_LIBUNWIND
		LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/unwind-libunwind.o
		endif

tools/perf/arch/arm64/include/perf_regs.h

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		#ifndef ARCH_PERF_REGS_H
		#define ARCH_PERF_REGS_H

		#include <stdlib.h>
		#include "../../util/types.h"
		#include <asm/perf_regs.h>

		#define PERF_REGS_MASK ((1ULL << PERF_REG_ARM64_MAX) - 1)
		#define PERF_REG_IP PERF_REG_ARM64_PC
		#define PERF_REG_SP PERF_REG_ARM64_SP

		static inline const char *perf_reg_name(int id)
		{
		switch (id) {
		case PERF_REG_ARM64_X0:
		return "x0";
		case PERF_REG_ARM64_X1:
		return "x1";
		case PERF_REG_ARM64_X2:
		return "x2";
		case PERF_REG_ARM64_X3:
		return "x3";
		case PERF_REG_ARM64_X4:
		return "x4";
		case PERF_REG_ARM64_X5:
		return "x5";
		case PERF_REG_ARM64_X6:
		return "x6";
		case PERF_REG_ARM64_X7:
		return "x7";
		case PERF_REG_ARM64_X8:
		return "x8";
		case PERF_REG_ARM64_X9:
		return "x9";
		case PERF_REG_ARM64_X10:
		return "x10";
		case PERF_REG_ARM64_X11:
		return "x11";
		case PERF_REG_ARM64_X12:
		return "x12";
		case PERF_REG_ARM64_X13:
		return "x13";
		case PERF_REG_ARM64_X14:
		return "x14";
		case PERF_REG_ARM64_X15:
		return "x15";
		case PERF_REG_ARM64_X16:
		return "x16";
		case PERF_REG_ARM64_X17:
		return "x17";
		case PERF_REG_ARM64_X18:
		return "x18";
		case PERF_REG_ARM64_X19:
		return "x19";
		case PERF_REG_ARM64_X20:
		return "x20";
		case PERF_REG_ARM64_X21:
		return "x21";
		case PERF_REG_ARM64_X22:
		return "x22";
		case PERF_REG_ARM64_X23:
		return "x23";
		case PERF_REG_ARM64_X24:
		return "x24";
		case PERF_REG_ARM64_X25:
		return "x25";
		case PERF_REG_ARM64_X26:
		return "x26";
		case PERF_REG_ARM64_X27:
		return "x27";
		case PERF_REG_ARM64_X28:
		return "x28";
		case PERF_REG_ARM64_X29:
		return "x29";
		case PERF_REG_ARM64_SP:
		return "sp";
		case PERF_REG_ARM64_LR:
		return "lr";
		case PERF_REG_ARM64_PC:
		return "pc";
		default:
		return NULL;
		}

		return NULL;
		}

		#endif /* ARCH_PERF_REGS_H */

tools/perf/arch/arm64/util/dwarf-regs.c

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		/*
		* Mapping of DWARF debug register numbers into register names.
		*
		* Copyright (C) 2010 Will Deacon, ARM Ltd.
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License version 2 as
		* published by the Free Software Foundation.
		*/

		#include <stddef.h>
		#include <dwarf-regs.h>

		struct pt_regs_dwarfnum {
		const char *name;
		unsigned int dwarfnum;
		};

		#define STR(s) #s
		#define REG_DWARFNUM_NAME(r, num) {.name = r, .dwarfnum = num}
		#define GPR_DWARFNUM_NAME(num) \
		{.name = STR(%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 pt_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 pt_regs_dwarfnum *roff;
		for (roff = regdwarfnum_table; roff->name != NULL; roff++)
		if (roff->dwarfnum == n)
		return roff->name;
		return NULL;
		}

tools/perf/arch/arm64/util/unwind-libunwind.c

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		#include <errno.h>
		#include <libunwind.h>
		#include "perf_regs.h"
		#include "../../util/unwind.h"

		int libunwind__arch_reg_id(int regnum)
		{
		switch (regnum) {
		case UNW_AARCH64_X0:
		return PERF_REG_ARM64_X0;
		case UNW_AARCH64_X1:
		return PERF_REG_ARM64_X1;
		case UNW_AARCH64_X2:
		return PERF_REG_ARM64_X2;
		case UNW_AARCH64_X3:
		return PERF_REG_ARM64_X3;
		case UNW_AARCH64_X4:
		return PERF_REG_ARM64_X4;
		case UNW_AARCH64_X5:
		return PERF_REG_ARM64_X5;
		case UNW_AARCH64_X6:
		return PERF_REG_ARM64_X6;
		case UNW_AARCH64_X7:
		return PERF_REG_ARM64_X7;
		case UNW_AARCH64_X8:
		return PERF_REG_ARM64_X8;
		case UNW_AARCH64_X9:
		return PERF_REG_ARM64_X9;
		case UNW_AARCH64_X10:
		return PERF_REG_ARM64_X10;
		case UNW_AARCH64_X11:
		return PERF_REG_ARM64_X11;
		case UNW_AARCH64_X12:
		return PERF_REG_ARM64_X12;
		case UNW_AARCH64_X13:
		return PERF_REG_ARM64_X13;
		case UNW_AARCH64_X14:
		return PERF_REG_ARM64_X14;
		case UNW_AARCH64_X15:
		return PERF_REG_ARM64_X15;
		case UNW_AARCH64_X16:
		return PERF_REG_ARM64_X16;
		case UNW_AARCH64_X17:
		return PERF_REG_ARM64_X17;
		case UNW_AARCH64_X18:
		return PERF_REG_ARM64_X18;
		case UNW_AARCH64_X19:
		return PERF_REG_ARM64_X19;
		case UNW_AARCH64_X20:
		return PERF_REG_ARM64_X20;
		case UNW_AARCH64_X21:
		return PERF_REG_ARM64_X21;
		case UNW_AARCH64_X22:
		return PERF_REG_ARM64_X22;
		case UNW_AARCH64_X23:
		return PERF_REG_ARM64_X23;
		case UNW_AARCH64_X24:
		return PERF_REG_ARM64_X24;
		case UNW_AARCH64_X25:
		return PERF_REG_ARM64_X25;
		case UNW_AARCH64_X26:
		return PERF_REG_ARM64_X26;
		case UNW_AARCH64_X27:
		return PERF_REG_ARM64_X27;
		case UNW_AARCH64_X28:
		return PERF_REG_ARM64_X28;
		case UNW_AARCH64_X29:
		return PERF_REG_ARM64_X29;
		case UNW_AARCH64_X30:
		return PERF_REG_ARM64_LR;
		case UNW_AARCH64_SP:
		return PERF_REG_ARM64_SP;
		case UNW_AARCH64_PC:
		return PERF_REG_ARM64_PC;
		default:
		pr_err("unwind: invalid reg id %d\n", regnum);
		return -EINVAL;
		}

		return -EINVAL;
		}

tools/perf/config/Makefile

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		@@ -29,11 +29,17 @@ ifeq ($(ARCH),x86)
		endif
		NO_PERF_REGS := 0
		endif

		ifeq ($(ARCH),arm)
		NO_PERF_REGS := 0
		LIBUNWIND_LIBS = -lunwind -lunwind-arm
		endif

		ifeq ($(ARCH),arm64)
		NO_PERF_REGS := 0
		LIBUNWIND_LIBS = -lunwind -lunwind-aarch64
		endif

		# So far there's only x86 libdw unwind support merged in perf.
		# Disable it on all other architectures in case libdw unwind
		# support is detected in system. Add supported architectures
		@@ -363,7 +369,7 @@ else
		endif

		ifndef NO_LIBUNWIND
		ifeq ($(ARCH),arm)
		ifeq ($(ARCH),$(filter $(ARCH),arm arm64))
		$(call feature_check,libunwind-debug-frame)
		ifneq ($(feature-libunwind-debug-frame), 1)
		msg := $(warning No debug_frame support found in libunwind);