riscv: Ensure the value of FP registers in the core dump file is up to date
commit 379eb01c upstream. The value of FP registers in the core dump file comes from the thread.fstate. However, kernel saves the FP registers to the thread.fstate only before scheduling out the process. If no process switch happens during the exception handling process, kernel will not have a chance to save the latest value of FP registers to thread.fstate. It will cause the value of FP registers in the core dump file may be incorrect. To solve this problem, this patch force lets kernel save the FP register into the thread.fstate if the target task_struct equals the current. Signed-off-by:Vincent Chen <vincent.chen@sifive.com> Reviewed-by:
Jisheng Zhang <jszhang@kernel.org> Fixes: b8c8a959 ("RISC-V: Add FP register ptrace support for gdb.") Cc: stable@vger.kernel.org Signed-off-by:
Palmer Dabbelt <palmerdabbelt@google.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
parent
e55a8b46
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