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Commit c4522469 authored by Chandan Kumar's avatar Chandan Kumar Committed by Michael Ellerman
Browse files

perf/powerpc: Add support for unwinding perf-stackdump 



Adds support for unwinding user stack dump by linking with libunwind.

Signed-off-by: default avatarChandan Kumar <chandan.kumar@linux.vnet.ibm.com>
Reviewed-by: default avatarNaveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Tested-by: default avatarNaveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Acked-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 17ed7c38

tools/perf/arch/powerpc/util/Build

+1 −0
Original line number Diff line number Diff line
@@ -5,3 +5,4 @@ libperf-y += perf_regs.o 


libperf-$(CONFIG_DWARF) += dwarf-regs.o

libperf-$(CONFIG_DWARF) += skip-callchain-idx.o

libperf-$(CONFIG_LIBUNWIND) += unwind-libunwind.o

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

0 → 100644
+96 −0
Original line number Diff line number Diff line 
/*

 * Copyright 2016 Chandan Kumar, 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 <errno.h>

#include <libunwind.h>

#include <asm/perf_regs.h>

#include "../../util/unwind.h"

#include "../../util/debug.h"



int libunwind__arch_reg_id(int regnum)

{

	switch (regnum) {

	case UNW_PPC64_R0:

		return PERF_REG_POWERPC_R0;

	case UNW_PPC64_R1:

		return PERF_REG_POWERPC_R1;

	case UNW_PPC64_R2:

		return PERF_REG_POWERPC_R2;

	case UNW_PPC64_R3:

		return PERF_REG_POWERPC_R3;

	case UNW_PPC64_R4:

		return PERF_REG_POWERPC_R4;

	case UNW_PPC64_R5:

		return PERF_REG_POWERPC_R5;

	case UNW_PPC64_R6:

		return PERF_REG_POWERPC_R6;

	case UNW_PPC64_R7:

		return PERF_REG_POWERPC_R7;

	case UNW_PPC64_R8:

		return PERF_REG_POWERPC_R8;

	case UNW_PPC64_R9:

		return PERF_REG_POWERPC_R9;

	case UNW_PPC64_R10:

		return PERF_REG_POWERPC_R10;

	case UNW_PPC64_R11:

		return PERF_REG_POWERPC_R11;

	case UNW_PPC64_R12:

		return PERF_REG_POWERPC_R12;

	case UNW_PPC64_R13:

		return PERF_REG_POWERPC_R13;

	case UNW_PPC64_R14:

		return PERF_REG_POWERPC_R14;

	case UNW_PPC64_R15:

		return PERF_REG_POWERPC_R15;

	case UNW_PPC64_R16:

		return PERF_REG_POWERPC_R16;

	case UNW_PPC64_R17:

		return PERF_REG_POWERPC_R17;

	case UNW_PPC64_R18:

		return PERF_REG_POWERPC_R18;

	case UNW_PPC64_R19:

		return PERF_REG_POWERPC_R19;

	case UNW_PPC64_R20:

		return PERF_REG_POWERPC_R20;

	case UNW_PPC64_R21:

		return PERF_REG_POWERPC_R21;

	case UNW_PPC64_R22:

		return PERF_REG_POWERPC_R22;

	case UNW_PPC64_R23:

		return PERF_REG_POWERPC_R23;

	case UNW_PPC64_R24:

		return PERF_REG_POWERPC_R24;

	case UNW_PPC64_R25:

		return PERF_REG_POWERPC_R25;

	case UNW_PPC64_R26:

		return PERF_REG_POWERPC_R26;

	case UNW_PPC64_R27:

		return PERF_REG_POWERPC_R27;

	case UNW_PPC64_R28:

		return PERF_REG_POWERPC_R28;

	case UNW_PPC64_R29:

		return PERF_REG_POWERPC_R29;

	case UNW_PPC64_R30:

		return PERF_REG_POWERPC_R30;

	case UNW_PPC64_R31:

		return PERF_REG_POWERPC_R31;

	case UNW_PPC64_LR:

		return PERF_REG_POWERPC_LINK;

	case UNW_PPC64_CTR:

		return PERF_REG_POWERPC_CTR;

	case UNW_PPC64_XER:

		return PERF_REG_POWERPC_XER;

	case UNW_PPC64_NIP:

		return PERF_REG_POWERPC_NIP;

	default:

		pr_err("unwind: invalid reg id %d\n", regnum);

		return -EINVAL;

	}

	return -EINVAL;

}

tools/perf/config/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ NO_PERF_REGS := 1 
# Additional ARCH settings for ppc

ifeq ($(ARCH),powerpc)

  NO_PERF_REGS := 0

  LIBUNWIND_LIBS := -lunwind -lunwind-ppc64

endif



# Additional ARCH settings for x86