1 files changed, 48 insertions, 0 deletions
diff --git a/libgo/syscalls/syscall.go b/libgo/syscalls/syscall.go
new file mode 100644
index 000000000..fa7d9d068
--- /dev/null
+++ b/libgo/syscalls/syscall.go
@@ -0,0 +1,48 @@
+// syscall.go -- Basic syscall interface.
+
+// Copyright 2009 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.
+
+// This package contains an interface to the low-level operating system
+// primitives.  The details vary depending on the underlying system.
+// Its primary use is inside other packages that provide a more portable
+// interface to the system, such as "os", "time" and "net".  Use those
+// packages rather than this one if you can.
+// For details of the functions and data types in this package consult
+// the manuals for the appropriate operating system.
+package syscall
+
+import "unsafe"
+
+func libc_syscall32(trap int32, a1, a2, a3, a4, a5, a6 int32) int32 __asm__ ("syscall");
+func libc_syscall64(trap int64, a1, a2, a3, a4, a5, a6 int64) int64 __asm__ ("syscall");
+
+// Do a system call.  We look at the size of uintptr to see how to pass
+// the arguments, so that we don't pass a 64-bit value when the function
+// expects a 32-bit one.
+func Syscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr) {
+  var r uintptr;
+  if unsafe.Sizeof(r) == 4 {
+    r1 := libc_syscall32(int32(trap), int32(a1), int32(a2), int32(a3), 0, 0, 0);
+    r = uintptr(r1);
+  } else {
+    r1 := libc_syscall64(int64(trap), int64(a1), int64(a2), int64(a3), 0, 0, 0);
+    r = uintptr(r1);
+  }
+  return r, 0, uintptr(GetErrno());
+}
+
+func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) {
+  var r uintptr;
+  if unsafe.Sizeof(r) == 4 {
+    r1 := libc_syscall32(int32(trap), int32(a1), int32(a2), int32(a3),
+    			 int32(a4), int32(a5), int32(a6));
+    r = uintptr(r1);
+  } else {
+    r1 := libc_syscall64(int64(trap), int64(a1), int64(a2), int64(a3),
+			 int64(a4), int64(a5), int64(a6));
+    r = uintptr(r1);
+  }
+  return r, 0, uintptr(GetErrno());
+}