Implement new syscall package.

Calls to library functions now use entersyscall and
exitsyscall as appropriate.  This is a first step toward
multiplexing goroutines onto threads.

From-SVN: r180345

1 files changed, 0 insertions, 111 deletions

diff --git a/libgo/syscalls/syscall.go b/libgo/syscalls/syscall.go
deleted file mode 100644
index 8c7a7ba..0000000
--- a/libgo/syscalls/syscall.go
+++ /dev/null
@@ -1,111 +0,0 @@
-// 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 (
-	"sync"
-	"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());
-}
-
-// Mmap manager, for use by operating system-specific implementations.
-
-type mmapper struct {
-	sync.Mutex
-	active map[*byte][]byte // active mappings; key is last byte in mapping
-	mmap   func(addr, length uintptr, prot, flags, fd int, offset int64) (uintptr, int)
-	munmap func(addr uintptr, length uintptr) int
-}
-
-func (m *mmapper) Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, errno int) {
-	if length <= 0 {
-		return nil, EINVAL
-	}
-
-	// Map the requested memory.
-	addr, errno := m.mmap(0, uintptr(length), prot, flags, fd, offset)
-	if errno != 0 {
-		return nil, errno
-	}
-
-	// Slice memory layout
-	var sl = struct {
-		addr uintptr
-		len  int
-		cap  int
-	}{addr, length, length}
-
-	// Use unsafe to turn sl into a []byte.
-	b := *(*[]byte)(unsafe.Pointer(&sl))
-
-	// Register mapping in m and return it.
-	p := &b[cap(b)-1]
-	m.Lock()
-	defer m.Unlock()
-	m.active[p] = b
-	return b, 0
-}
-
-func (m *mmapper) Munmap(data []byte) (errno int) {
-	if len(data) == 0 || len(data) != cap(data) {
-		return EINVAL
-	}
-
-	// Find the base of the mapping.
-	p := &data[cap(data)-1]
-	m.Lock()
-	defer m.Unlock()
-	b := m.active[p]
-	if b == nil || &b[0] != &data[0] {
-		return EINVAL
-	}
-
-	// Unmap the memory and update m.
-	if errno := m.munmap(uintptr(unsafe.Pointer(&b[0])), uintptr(len(b))); errno != 0 {
-		return errno
-	}
-	m.active[p] = nil, false
-	return 0
-}