35fa852d6d
The syscall_SyscallX functions currently discard the nargs parameter when calling syscall_SyscallN. This precludes some optimizations down the line. For example, on amd64, a syscall that takes 0 arguments don't need to set any of the params passing registers (CX, DX, R8, and R9). This CL updates all syscall_SyscallX functions so they call syscall_SyscallN with an argument slice of the right length. While here, remove the hack in syscall_SyscallN to support less than 4 arguments, and update instead asmstdcall on amd64 to properly handle this case. Change-Id: I0328e14f34c2b000fde06cc6a579b09e8c32f2b9 Reviewed-on: https://go-review.googlesource.com/c/go/+/563315 TryBot-Result: Gopher Robot <gobot@golang.org> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Run-TryBot: Quim Muntal <quimmuntal@gmail.com> Reviewed-by: Keith Randall <khr@golang.org> Reviewed-by: Keith Randall <khr@google.com> Reviewed-by: Than McIntosh <thanm@google.com> |
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