From b2397a823399be9ae901d02f0073df5001b75c55 Mon Sep 17 00:00:00 2001 From: Samuli Piippo Date: Thu, 12 Feb 2015 14:44:25 +0200 Subject: Performance analysis tools for Linux Build perf with DWARF unwinding support. Kernels older then 3.14 need to be patched to add ARM support. Kernels for tibidabo (3.0) and imx53 (2.6) are too old and would require more patches to be backported, so they are left without unwinding support. RPi needed extra layer to modify the kernel recipe, and linux-imx recipe was renamed so that it doesn't conflict with older tibidabo kernel recipe. Change-Id: Ic8331f8feeace67b32a5ce99ffd3fda517d595d1 Reviewed-by: Andy Nichols Reviewed-by: Ulf Hermann --- ...re-up-perf_regs-and-unwind-support-for-AR.patch | 171 +++++++++++++++++++++ .../linux/linux-raspberrypi_3.12.26.bbappend | 27 ++++ 2 files changed, 198 insertions(+) create mode 100644 meta-raspberrypi-extras/recipes/linux/linux-raspberrypi/ARM-perf-wire-up-perf_regs-and-unwind-support-for-AR.patch create mode 100644 meta-raspberrypi-extras/recipes/linux/linux-raspberrypi_3.12.26.bbappend (limited to 'meta-raspberrypi-extras/recipes') diff --git a/meta-raspberrypi-extras/recipes/linux/linux-raspberrypi/ARM-perf-wire-up-perf_regs-and-unwind-support-for-AR.patch b/meta-raspberrypi-extras/recipes/linux/linux-raspberrypi/ARM-perf-wire-up-perf_regs-and-unwind-support-for-AR.patch new file mode 100644 index 0000000..4f2a45a --- /dev/null +++ b/meta-raspberrypi-extras/recipes/linux/linux-raspberrypi/ARM-perf-wire-up-perf_regs-and-unwind-support-for-AR.patch @@ -0,0 +1,171 @@ +From 7495f3742dda97612a77d92fa62f85cb7591ab14 Mon Sep 17 00:00:00 2001 +From: Will Deacon +Date: Thu, 26 Sep 2013 12:36:36 +0100 +Subject: [PATCH] ARM: perf: wire up perf_regs and unwind support for ARM + +This patch hooks in the perf_regs and libunwind code for ARM. + +Cc: Jean Pihet +Signed-off-by: Will Deacon +--- + tools/perf/arch/arm/Makefile | 3 ++ + tools/perf/arch/arm/include/perf_regs.h | 54 +++++++++++++++++++++++++++++++++ + tools/perf/arch/arm/util/unwind.c | 48 +++++++++++++++++++++++++++++ + tools/perf/config/Makefile | 7 +++-- + 4 files changed, 110 insertions(+), 2 deletions(-) + create mode 100644 tools/perf/arch/arm/include/perf_regs.h + create mode 100644 tools/perf/arch/arm/util/unwind.c + +diff --git a/tools/perf/arch/arm/Makefile b/tools/perf/arch/arm/Makefile +index 15130b5..fe9b61e 100644 +--- a/tools/perf/arch/arm/Makefile ++++ b/tools/perf/arch/arm/Makefile +@@ -2,3 +2,6 @@ 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.o ++endif +diff --git a/tools/perf/arch/arm/include/perf_regs.h b/tools/perf/arch/arm/include/perf_regs.h +new file mode 100644 +index 0000000..2a1cfde +--- /dev/null ++++ b/tools/perf/arch/arm/include/perf_regs.h +@@ -0,0 +1,54 @@ ++#ifndef ARCH_PERF_REGS_H ++#define ARCH_PERF_REGS_H ++ ++#include ++#include "../../util/types.h" ++#include ++ ++#define PERF_REGS_MASK ((1ULL << PERF_REG_ARM_MAX) - 1) ++#define PERF_REG_IP PERF_REG_ARM_PC ++#define PERF_REG_SP PERF_REG_ARM_SP ++ ++static inline const char *perf_reg_name(int id) ++{ ++ switch (id) { ++ case PERF_REG_ARM_R0: ++ return "r0"; ++ case PERF_REG_ARM_R1: ++ return "r1"; ++ case PERF_REG_ARM_R2: ++ return "r2"; ++ case PERF_REG_ARM_R3: ++ return "r3"; ++ case PERF_REG_ARM_R4: ++ return "r4"; ++ case PERF_REG_ARM_R5: ++ return "r5"; ++ case PERF_REG_ARM_R6: ++ return "r6"; ++ case PERF_REG_ARM_R7: ++ return "r7"; ++ case PERF_REG_ARM_R8: ++ return "r8"; ++ case PERF_REG_ARM_R9: ++ return "r9"; ++ case PERF_REG_ARM_R10: ++ return "r10"; ++ case PERF_REG_ARM_FP: ++ return "fp"; ++ case PERF_REG_ARM_IP: ++ return "ip"; ++ case PERF_REG_ARM_SP: ++ return "sp"; ++ case PERF_REG_ARM_LR: ++ return "lr"; ++ case PERF_REG_ARM_PC: ++ return "pc"; ++ default: ++ return NULL; ++ } ++ ++ return NULL; ++} ++ ++#endif /* ARCH_PERF_REGS_H */ +diff --git a/tools/perf/arch/arm/util/unwind.c b/tools/perf/arch/arm/util/unwind.c +new file mode 100644 +index 0000000..da3dc95 +--- /dev/null ++++ b/tools/perf/arch/arm/util/unwind.c +@@ -0,0 +1,48 @@ ++ ++#include ++#include ++#include "perf_regs.h" ++#include "../../util/unwind.h" ++ ++int unwind__arch_reg_id(int regnum) ++{ ++ switch (regnum) { ++ case UNW_ARM_R0: ++ return PERF_REG_ARM_R0; ++ case UNW_ARM_R1: ++ return PERF_REG_ARM_R1; ++ case UNW_ARM_R2: ++ return PERF_REG_ARM_R2; ++ case UNW_ARM_R3: ++ return PERF_REG_ARM_R3; ++ case UNW_ARM_R4: ++ return PERF_REG_ARM_R4; ++ case UNW_ARM_R5: ++ return PERF_REG_ARM_R5; ++ case UNW_ARM_R6: ++ return PERF_REG_ARM_R6; ++ case UNW_ARM_R7: ++ return PERF_REG_ARM_R7; ++ case UNW_ARM_R8: ++ return PERF_REG_ARM_R8; ++ case UNW_ARM_R9: ++ return PERF_REG_ARM_R9; ++ case UNW_ARM_R10: ++ return PERF_REG_ARM_R10; ++ case UNW_ARM_R11: ++ return PERF_REG_ARM_FP; ++ case UNW_ARM_R12: ++ return PERF_REG_ARM_IP; ++ case UNW_ARM_R13: ++ return PERF_REG_ARM_SP; ++ case UNW_ARM_R14: ++ return PERF_REG_ARM_LR; ++ case UNW_ARM_R15: ++ return PERF_REG_ARM_PC; ++ default: ++ pr_err("unwind: invalid reg id %d\n", regnum); ++ return -EINVAL; ++ } ++ ++ return -EINVAL; ++} +diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile +index 5f6f9b3..4796ce5 100644 +--- a/tools/perf/config/Makefile ++++ b/tools/perf/config/Makefile +@@ -29,6 +29,10 @@ ifeq ($(ARCH),x86_64) + NO_PERF_REGS := 0 + LIBUNWIND_LIBS = -lunwind -lunwind-x86_64 + endif ++ifeq ($(ARCH),arm) ++ NO_PERF_REGS := 0 ++ LIBUNWIND_LIBS = -lunwind -lunwind-arm ++endif + + ifeq ($(NO_PERF_REGS),0) + CFLAGS += -DHAVE_PERF_REGS +@@ -208,8 +212,7 @@ ifeq ($(call try-cc,$(SOURCE_ELF_MMAP),$(FLAGS_LIBELF),-DLIBELF_MMAP),y) + endif # try-cc + endif # NO_LIBELF + +-# There's only x86 (both 32 and 64) support for CFI unwind so far +-ifneq ($(ARCH),x86) ++ifeq ($(LIBUNWIND_LIBS),) + NO_LIBUNWIND := 1 + endif + +-- +1.9.1 + diff --git a/meta-raspberrypi-extras/recipes/linux/linux-raspberrypi_3.12.26.bbappend b/meta-raspberrypi-extras/recipes/linux/linux-raspberrypi_3.12.26.bbappend new file mode 100644 index 0000000..94b2ab1 --- /dev/null +++ b/meta-raspberrypi-extras/recipes/linux/linux-raspberrypi_3.12.26.bbappend @@ -0,0 +1,27 @@ +############################################################################# +## +## Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies). +## +## This file is part of the Qt Enterprise Embedded Scripts of the Qt +## framework. +## +## $QT_BEGIN_LICENSE$ +## Commercial License Usage Only +## Licensees holding valid commercial Qt license agreements with Digia +## with an appropriate addendum covering the Qt Enterprise Embedded Scripts, +## may use this file in accordance with the terms contained in said license +## agreement. +## +## For further information use the contact form at +## http://www.qt.io/contact-us. +## +## +## $QT_END_LICENSE$ +## +############################################################################# + +FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:${THISDIR}/../../../recipes/linux/linux:" +SRC_URI += "\ + file://ARM-perf-add-support-for-perf-registers-API.diff \ + file://ARM-perf-wire-up-perf_regs-and-unwind-support-for-AR.patch \ + " -- cgit v1.2.3-54-g00ecf