Re: [PATCH v11 4/8] arm64: ftrace: Enable HAVE_FUNCTION_GRAPH_RETVAL
From: Catalin Marinas <catalin.marinas@arm.com>
Date: 2023-06-09 09:37:18
Also in:
linux-arm-kernel, linux-riscv, lkml, loongarch
On Sat, Apr 08, 2023 at 05:42:18AM -0700, Donglin Peng wrote:
The previous patch ("function_graph: Support recording and printing
the return value of function") has laid the groundwork for the for
the funcgraph-retval, and this modification makes it available on
the ARM64 platform.
We introduce a new structure called fgraph_ret_regs for the ARM64
platform to hold return registers and the frame pointer. We then
fill its content in the return_to_handler and pass its address to
the function ftrace_return_to_handler to record the return value.
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Donglin Peng <redacted>We fully trust Mark's reviews ;) but just in case you need an official maintainer ack: Acked-by: Catalin Marinas <catalin.marinas@arm.com>