tree 5780cbb3eb57dd931c571c5e92f8f31b26559c58
parent 23c7d70d55c6d963f225744cd1b996dee68c88d1
author Jean Pihet <jean.pihet@linaro.org> 1391451509 +0100
committer Catalin Marinas <catalin.marinas@arm.com> 1394709758 +0000

ARM64: perf: support dwarf unwinding in compat mode

Add support for unwinding using the dwarf information in compat
mode. Using the correct user stack pointer allows perf to record
the frames correctly in the native and compat modes.

Note that although the dwarf frame unwinding works ok using
libunwind in native mode (on ARMv7 & ARMv8), some changes are
required to the libunwind code for the compat mode. Those changes
are posted separately on the libunwind mailing list.

Tested on ARMv8 platform with v8 and compat v7 binaries, the latter
are statically built.

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>