Implement compat_setup_rt_frame for sigcontext save & restore. The
main process is the same with signal, but the rv32 pt_regs' size
is different from rv64's, so we needs convert them.
Signed-off-by: NGuo Ren <guoren@linux.alibaba.com>
Signed-off-by: NGuo Ren <guoren@kernel.org>
Reviewed-by: NPalmer Dabbelt <palmer@rivosinc.com>
Tested-by: NHeiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/r/20220405071314.3225832-19-guoren@kernel.orgSigned-off-by: NPalmer Dabbelt <palmer@rivosinc.com>