AKASHI Takahiro bd7d38dbdf arm64: ftrace: Add dynamic ftrace support ... This patch allows "dynamic ftrace" if CONFIG_DYNAMIC_FTRACE is enabled. Here we can turn on and off tracing dynamically per-function base. On arm64, this is done by patching single branch instruction to _mcount() inserted by gcc -pg option. The branch is replaced to NOP initially at kernel start up, and later on, NOP to branch to ftrace_caller() when enabled or branch to NOP when disabled. Please note that ftrace_caller() is a counterpart of _mcount() in case of 'static' ftrace. More details on architecture specific requirements are described in Documentation/trace/ftrace-design.txt. Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com>		2014-05-29 09:08:33 +01:00
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asm	arm64: ftrace: Add dynamic ftrace support	2014-05-29 09:08:33 +01:00
uapi/asm	arm64: Expose ESR_EL1 information to user when SIGSEGV/SIGBUS	2014-05-09 15:47:49 +01:00