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kernel
os
linux
perf/powerpc: Add support for unwinding perf-stackdump
Adds support for unwinding user stack dump by linking with libunwind.
Signed-off-by: Chandan Kumar <chandan.kumar@linux.vnet.ibm.com>
Reviewed-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Tested-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
authored by
Chandan Kumar
and committed by
Michael Ellerman
c4522469
17ed7c38
+98
+1
tools/perf/arch/powerpc/util/Build
+1
tools/perf/arch/powerpc/util/Build
+96
tools/perf/arch/powerpc/util/unwind-libunwind.c
+96
tools/perf/arch/powerpc/util/unwind-libunwind.c
···
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/*
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* Copyright 2016 Chandan Kumar, IBM Corporation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <errno.h>
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#include <libunwind.h>
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#include <asm/perf_regs.h>
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#include "../../util/unwind.h"
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#include "../../util/debug.h"
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int libunwind__arch_reg_id(int regnum)
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{
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switch (regnum) {
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case UNW_PPC64_R0:
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return PERF_REG_POWERPC_R0;
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case UNW_PPC64_R1:
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return PERF_REG_POWERPC_R1;
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case UNW_PPC64_R2:
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return PERF_REG_POWERPC_R2;
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case UNW_PPC64_R3:
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return PERF_REG_POWERPC_R3;
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case UNW_PPC64_R4:
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return PERF_REG_POWERPC_R4;
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case UNW_PPC64_R5:
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return PERF_REG_POWERPC_R5;
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case UNW_PPC64_R6:
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return PERF_REG_POWERPC_R6;
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case UNW_PPC64_R7:
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return PERF_REG_POWERPC_R7;
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case UNW_PPC64_R8:
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return PERF_REG_POWERPC_R8;
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case UNW_PPC64_R9:
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return PERF_REG_POWERPC_R9;
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case UNW_PPC64_R10:
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return PERF_REG_POWERPC_R10;
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case UNW_PPC64_R11:
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return PERF_REG_POWERPC_R11;
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case UNW_PPC64_R12:
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return PERF_REG_POWERPC_R12;
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case UNW_PPC64_R13:
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return PERF_REG_POWERPC_R13;
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case UNW_PPC64_R14:
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return PERF_REG_POWERPC_R14;
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case UNW_PPC64_R15:
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return PERF_REG_POWERPC_R15;
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case UNW_PPC64_R16:
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return PERF_REG_POWERPC_R16;
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case UNW_PPC64_R17:
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return PERF_REG_POWERPC_R17;
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case UNW_PPC64_R18:
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return PERF_REG_POWERPC_R18;
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case UNW_PPC64_R19:
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return PERF_REG_POWERPC_R19;
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case UNW_PPC64_R20:
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return PERF_REG_POWERPC_R20;
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case UNW_PPC64_R21:
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return PERF_REG_POWERPC_R21;
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case UNW_PPC64_R22:
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return PERF_REG_POWERPC_R22;
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case UNW_PPC64_R23:
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return PERF_REG_POWERPC_R23;
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case UNW_PPC64_R24:
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return PERF_REG_POWERPC_R24;
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case UNW_PPC64_R25:
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return PERF_REG_POWERPC_R25;
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case UNW_PPC64_R26:
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return PERF_REG_POWERPC_R26;
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case UNW_PPC64_R27:
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return PERF_REG_POWERPC_R27;
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case UNW_PPC64_R28:
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return PERF_REG_POWERPC_R28;
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case UNW_PPC64_R29:
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return PERF_REG_POWERPC_R29;
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case UNW_PPC64_R30:
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return PERF_REG_POWERPC_R30;
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case UNW_PPC64_R31:
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return PERF_REG_POWERPC_R31;
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case UNW_PPC64_LR:
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return PERF_REG_POWERPC_LINK;
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case UNW_PPC64_CTR:
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return PERF_REG_POWERPC_CTR;
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case UNW_PPC64_XER:
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return PERF_REG_POWERPC_XER;
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case UNW_PPC64_NIP:
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return PERF_REG_POWERPC_NIP;
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default:
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pr_err("unwind: invalid reg id %d\n", regnum);
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return -EINVAL;
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}
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return -EINVAL;
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}