runtime: migrate internal/syscall to internal/runtime

For #65355

Change-Id: I5fefe30dcb520159de565e61dafc74a740fc8730
Reviewed-on: https://go-review.googlesource.com/c/go/+/559715
Reviewed-by: Michael Pratt <mpratt@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>

1 files changed, 0 insertions, 67 deletions

diff --git a/src/runtime/internal/syscall/syscall_linux.go b/src/runtime/internal/syscall/syscall_linux.go
deleted file mode 100644
index cb88659394..0000000000
--- a/src/runtime/internal/syscall/syscall_linux.go
+++ /dev/null
@@ -1,67 +0,0 @@
-// Copyright 2022 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package syscall provides the syscall primitives required for the runtime.
-package syscall
-
-import (
-	"unsafe"
-)
-
-// TODO(https://go.dev/issue/51087): This package is incomplete and currently
-// only contains very minimal support for Linux.
-
-// Syscall6 calls system call number 'num' with arguments a1-6.
-func Syscall6(num, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, errno uintptr)
-
-// syscall_RawSyscall6 is a push linkname to export Syscall6 as
-// syscall.RawSyscall6.
-//
-// //go:uintptrkeepalive because the uintptr argument may be converted pointers
-// that need to be kept alive in the caller (this is implied for Syscall6 since
-// it has no body).
-//
-// //go:nosplit because stack copying does not account for uintptrkeepalive, so
-// the stack must not grow. Stack copying cannot blindly assume that all
-// uintptr arguments are pointers, because some values may look like pointers,
-// but not really be pointers, and adjusting their value would break the call.
-//
-// This is a separate wrapper because we can't export one function as two
-// names. The assembly implementations name themselves Syscall6 would not be
-// affected by a linkname.
-//
-//go:uintptrkeepalive
-//go:nosplit
-//go:linkname syscall_RawSyscall6 syscall.RawSyscall6
-func syscall_RawSyscall6(num, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, errno uintptr) {
-	return Syscall6(num, a1, a2, a3, a4, a5, a6)
-}
-
-func EpollCreate1(flags int32) (fd int32, errno uintptr) {
-	r1, _, e := Syscall6(SYS_EPOLL_CREATE1, uintptr(flags), 0, 0, 0, 0, 0)
-	return int32(r1), e
-}
-
-var _zero uintptr
-
-func EpollWait(epfd int32, events []EpollEvent, maxev, waitms int32) (n int32, errno uintptr) {
-	var ev unsafe.Pointer
-	if len(events) > 0 {
-		ev = unsafe.Pointer(&events[0])
-	} else {
-		ev = unsafe.Pointer(&_zero)
-	}
-	r1, _, e := Syscall6(SYS_EPOLL_PWAIT, uintptr(epfd), uintptr(ev), uintptr(maxev), uintptr(waitms), 0, 0)
-	return int32(r1), e
-}
-
-func EpollCtl(epfd, op, fd int32, event *EpollEvent) (errno uintptr) {
-	_, _, e := Syscall6(SYS_EPOLL_CTL, uintptr(epfd), uintptr(op), uintptr(fd), uintptr(unsafe.Pointer(event)), 0, 0)
-	return e
-}
-
-func Eventfd(initval, flags int32) (fd int32, errno uintptr) {
-	r1, _, e := Syscall6(SYS_EVENTFD2, uintptr(initval), uintptr(flags), 0, 0, 0, 0)
-	return int32(r1), e
-}