ARM64: perf: add support for perf registers API

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This patch implements the functions required for the perf registers API,
allowing the perf tool to interface kernel register dumps with libunwind
in order to provide userspace backtracing.
Compat mode is also supported.

Only the general purpose user space registers are exported, i.e.:
 PERF_REG_ARM_X0,
 ...
 PERF_REG_ARM_X28,
 PERF_REG_ARM_FP,
 PERF_REG_ARM_LR,
 PERF_REG_ARM_SP,
 PERF_REG_ARM_PC
and not the PERF_REG_ARM_V* registers.

Signed-off-by: Jean Pihet <jean.pihet@linaro.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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Jean Pihet 2014-02-03 19:18:27 +01:00 • committed by Catalin Marinas

parent 87366d8cf7

commit 2ee0d7fd36

6 changed files with 90 additions and 1 deletions

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2

arch/arm64/Kconfig

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1

arch/arm64/include/asm/ptrace.h

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1

arch/arm64/include/uapi/asm/Kbuild

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40

arch/arm64/include/uapi/asm/perf_regs.h

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3

arch/arm64/kernel/Makefile

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44

arch/arm64/kernel/perf_regs.c

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