Add AARCH64 specific support. This includes the following: - AARCH64 perf registers definition and hooks, - compat mode registers use, i.e. profiling a 32-bit binary on a 64-bit system, - unwinding using the dwarf information from the .debug_frame section of the ELF binary, - unwinding using the frame pointer information; in 64-bit and compat modes.
Notes: - the tools/perf change is submitted separately on LKML, - support for unwinding using the dwarf information in compat mode requires some changes to the libunwind code. Those changes have been submitted on the libunwind ML and are in discussion.
Tested on ARMv7, ARMv8 and x86_64 platforms. The compat mode has been tested on ARMv8 using statically built 32-bit binaries.
Jean Pihet (3): ARM64: perf: add support for perf registers API ARM64: perf: add support for frame pointer unwinding in compat mode ARM64: perf: support dwarf unwinding in compat mode
arch/arm64/Kconfig | 2 + arch/arm64/include/asm/compat.h | 2 +- arch/arm64/include/asm/ptrace.h | 3 +- arch/arm64/include/uapi/asm/Kbuild | 1 + arch/arm64/include/uapi/asm/perf_regs.h | 40 ++++++++++++++++++ arch/arm64/kernel/Makefile | 1 + arch/arm64/kernel/perf_event.c | 75 +++++++++++++++++++++++++++++---- arch/arm64/kernel/perf_regs.c | 44 +++++++++++++++++++ 8 files changed, 158 insertions(+), 10 deletions(-) create mode 100644 arch/arm64/include/uapi/asm/perf_regs.h create mode 100644 arch/arm64/kernel/perf_regs.c