On Mon, Jun 18, 2018 at 01:02:59PM +0100, Mark Rutland wrote: > As a first step towards invoking syscalls with a pt_regs argument, > convert the raw syscall invocation logic to C. We end up with a bit more > register shuffling, but the unified invocation logic means we can unify > the tracing paths, too. > > Previously, assembly had to open-code calls to ni_sys() when the system > call number was out-of-bounds for the relevant syscall table. This case > is now handled by invoke_syscall(), and the assembly no longer need to > handle this case explicitly. This allows the tracing paths to be > simplfiied and unified, as we no longer need the __ni_sys_trace path and 'simplified' > the __sys_trace_return label. > > This only converts the invocation of the syscall. The rest of the > syscall triage and tracing is left in assembly for now, and will be > converted in subsequent patches. > > Signed-off-by: Mark Rutland <mark.rutland@xxxxxxx> > Cc: Catalin Marinas <catalin.marinas@xxxxxxx> > Cc: Will Deacon <will.deacon@xxxxxxx> Reviewed-by: Catalin Marinas <catalin.marinas@xxxxxxx>
