From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753362Ab0DLGp0 (ORCPT ); Mon, 12 Apr 2010 02:45:26 -0400 Received: from e23smtp02.au.ibm.com ([202.81.31.144]:47784 "EHLO e23smtp02.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752438Ab0DLGpX (ORCPT ); Mon, 12 Apr 2010 02:45:23 -0400 From: "Ian Munsie" To: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Cc: benh@kernel.crashing.org, Ian Munsie , Peter Zijlstra , Paul Mackerras , Ingo Molnar , Arnaldo Carvalho de Melo Subject: [PATCH 2/2] perf probe: Add PowerPC DWARF register number mappings Date: Mon, 12 Apr 2010 16:43:16 +1000 Message-Id: <1271054596-26561-3-git-send-email-imunsie@au.ibm.com> X-Mailer: git-send-email 1.7.0 In-Reply-To: <1271054596-26561-2-git-send-email-imunsie@au.ibm.com> References: <1271054596-26561-1-git-send-email-imunsie@au.ibm.com> <1271054596-26561-2-git-send-email-imunsie@au.ibm.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Ian Munsie This patch adds mappings from the register numbers from DWARF to the register names used in the PowerPC Regs and Stack Access API. This allows perf probe to be used to record variable contents on PowerPC. This patch depends on functionality in the powerpc/next tree, though it will compile fine without it. Specifically this patch depends on 359e4284a3f37aba7fd06d993863de2509d86f54 Signed-off-by: Ian Munsie --- tools/perf/arch/powerpc/Makefile | 1 + tools/perf/arch/powerpc/include/arch_dwarf-regs.h | 6 ++ tools/perf/arch/powerpc/util/dwarf-regs.c | 88 +++++++++++++++++++++ 3 files changed, 95 insertions(+), 0 deletions(-) create mode 100644 tools/perf/arch/powerpc/Makefile create mode 100644 tools/perf/arch/powerpc/include/arch_dwarf-regs.h create mode 100644 tools/perf/arch/powerpc/util/dwarf-regs.c diff --git a/tools/perf/arch/powerpc/Makefile b/tools/perf/arch/powerpc/Makefile new file mode 100644 index 0000000..1191403 --- /dev/null +++ b/tools/perf/arch/powerpc/Makefile @@ -0,0 +1 @@ +LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/dwarf-regs.o diff --git a/tools/perf/arch/powerpc/include/arch_dwarf-regs.h b/tools/perf/arch/powerpc/include/arch_dwarf-regs.h new file mode 100644 index 0000000..a7fc588 --- /dev/null +++ b/tools/perf/arch/powerpc/include/arch_dwarf-regs.h @@ -0,0 +1,6 @@ +#ifndef _PREF_ARCH_X86_DWARF_REGS_H +#define _PREF_ARCH_X86_DWARF_REGS_H + +#define get_arch_regstr(n) get_arch_regstr(n) + +#endif diff --git a/tools/perf/arch/powerpc/util/dwarf-regs.c b/tools/perf/arch/powerpc/util/dwarf-regs.c new file mode 100644 index 0000000..48ae0c5 --- /dev/null +++ b/tools/perf/arch/powerpc/util/dwarf-regs.c @@ -0,0 +1,88 @@ +/* + * Mapping of DWARF debug register numbers into register names. + * + * Copyright (C) 2010 Ian Munsie, IBM Corporation. + * + * 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. + */ + +#include +#include + + +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(%gpr##num), .dwarfnum = num} +#define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0} + +/* + * Reference: + * http://refspecs.linuxfoundation.org/ELF/ppc64/PPC-elf64abi-1.9.html + */ +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), + GPR_DWARFNUM_NAME(30), + GPR_DWARFNUM_NAME(31), + REG_DWARFNUM_NAME("%msr", 66), + REG_DWARFNUM_NAME("%ctr", 109), + REG_DWARFNUM_NAME("%link", 108), + REG_DWARFNUM_NAME("%xer", 101), + REG_DWARFNUM_NAME("%dar", 119), + REG_DWARFNUM_NAME("%dsisr", 118), + 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; +} -- 1.7.0 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e23smtp01.au.ibm.com (e23smtp01.au.ibm.com [202.81.31.143]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "e23smtp01.au.ibm.com", Issuer "Equifax" (verified OK)) by ozlabs.org (Postfix) with ESMTPS id 04FEBB7D1A for ; Mon, 12 Apr 2010 16:45:10 +1000 (EST) Received: from d23relay03.au.ibm.com (d23relay03.au.ibm.com [202.81.31.245]) by e23smtp01.au.ibm.com (8.14.3/8.13.1) with ESMTP id o3C6gtAM002465 for ; Mon, 12 Apr 2010 16:42:55 +1000 Received: from d23av02.au.ibm.com (d23av02.au.ibm.com [9.190.235.138]) by d23relay03.au.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id o3C6j9tN1106008 for ; Mon, 12 Apr 2010 16:45:09 +1000 Received: from d23av02.au.ibm.com (loopback [127.0.0.1]) by d23av02.au.ibm.com (8.14.3/8.13.1/NCO v10.0 AVout) with ESMTP id o3C6j8hv015293 for ; Mon, 12 Apr 2010 16:45:08 +1000 From: "Ian Munsie" To: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH 2/2] perf probe: Add PowerPC DWARF register number mappings Date: Mon, 12 Apr 2010 16:43:16 +1000 Message-Id: <1271054596-26561-3-git-send-email-imunsie@au.ibm.com> In-Reply-To: <1271054596-26561-2-git-send-email-imunsie@au.ibm.com> References: <1271054596-26561-1-git-send-email-imunsie@au.ibm.com> <1271054596-26561-2-git-send-email-imunsie@au.ibm.com> Cc: Peter Zijlstra , Arnaldo Carvalho de Melo , Paul Mackerras , Ian Munsie , Ingo Molnar List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Ian Munsie This patch adds mappings from the register numbers from DWARF to the register names used in the PowerPC Regs and Stack Access API. This allows perf probe to be used to record variable contents on PowerPC. This patch depends on functionality in the powerpc/next tree, though it will compile fine without it. Specifically this patch depends on 359e4284a3f37aba7fd06d993863de2509d86f54 Signed-off-by: Ian Munsie --- tools/perf/arch/powerpc/Makefile | 1 + tools/perf/arch/powerpc/include/arch_dwarf-regs.h | 6 ++ tools/perf/arch/powerpc/util/dwarf-regs.c | 88 +++++++++++++++++++++ 3 files changed, 95 insertions(+), 0 deletions(-) create mode 100644 tools/perf/arch/powerpc/Makefile create mode 100644 tools/perf/arch/powerpc/include/arch_dwarf-regs.h create mode 100644 tools/perf/arch/powerpc/util/dwarf-regs.c diff --git a/tools/perf/arch/powerpc/Makefile b/tools/perf/arch/powerpc/Makefile new file mode 100644 index 0000000..1191403 --- /dev/null +++ b/tools/perf/arch/powerpc/Makefile @@ -0,0 +1 @@ +LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/dwarf-regs.o diff --git a/tools/perf/arch/powerpc/include/arch_dwarf-regs.h b/tools/perf/arch/powerpc/include/arch_dwarf-regs.h new file mode 100644 index 0000000..a7fc588 --- /dev/null +++ b/tools/perf/arch/powerpc/include/arch_dwarf-regs.h @@ -0,0 +1,6 @@ +#ifndef _PREF_ARCH_X86_DWARF_REGS_H +#define _PREF_ARCH_X86_DWARF_REGS_H + +#define get_arch_regstr(n) get_arch_regstr(n) + +#endif diff --git a/tools/perf/arch/powerpc/util/dwarf-regs.c b/tools/perf/arch/powerpc/util/dwarf-regs.c new file mode 100644 index 0000000..48ae0c5 --- /dev/null +++ b/tools/perf/arch/powerpc/util/dwarf-regs.c @@ -0,0 +1,88 @@ +/* + * Mapping of DWARF debug register numbers into register names. + * + * Copyright (C) 2010 Ian Munsie, IBM Corporation. + * + * 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. + */ + +#include +#include + + +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(%gpr##num), .dwarfnum = num} +#define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0} + +/* + * Reference: + * http://refspecs.linuxfoundation.org/ELF/ppc64/PPC-elf64abi-1.9.html + */ +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), + GPR_DWARFNUM_NAME(30), + GPR_DWARFNUM_NAME(31), + REG_DWARFNUM_NAME("%msr", 66), + REG_DWARFNUM_NAME("%ctr", 109), + REG_DWARFNUM_NAME("%link", 108), + REG_DWARFNUM_NAME("%xer", 101), + REG_DWARFNUM_NAME("%dar", 119), + REG_DWARFNUM_NAME("%dsisr", 118), + 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; +} -- 1.7.0