obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.

1 files changed, 383 insertions, 0 deletions

diff --git a/libgo/syscalls/socket.go b/libgo/syscalls/socket.go
new file mode 100644
index 000000000..65c191671
--- /dev/null
+++ b/libgo/syscalls/socket.go
@@ -0,0 +1,383 @@
+// socket.go -- Socket handling.
+
+// 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.
+
+// Low-level socket interface.
+// Only for implementing net package.
+// DO NOT USE DIRECTLY.
+
+package syscall
+
+import "unsafe"
+
+type RawSockaddrAny struct {
+	Addr RawSockaddr;
+	Pad [12]int8;
+}
+
+const SizeofSockaddrAny = 0x1c;
+
+// For testing: clients can set this flag to force
+// creation of IPv6 sockets to return EAFNOSUPPORT.
+var SocketDisableIPv6 bool
+
+type Sockaddr interface {
+	sockaddr() (ptr *RawSockaddrAny, len Socklen_t, errno int);	// lowercase; only we can define Sockaddrs
+}
+
+type SockaddrInet4 struct {
+	Port int;
+	Addr [4]byte;
+	raw RawSockaddrInet4;
+}
+
+type SockaddrInet6 struct {
+	Port int;
+	Addr [16]byte;
+	raw RawSockaddrInet6;
+}
+
+type SockaddrUnix struct {
+	Name string;
+	raw RawSockaddrUnix;
+}
+
+type Linger struct {
+	Onoff int32;
+	Linger int32;
+}
+
+func (sa *SockaddrInet4) sockaddr() (*RawSockaddrAny, Socklen_t, int) {
+	if sa.Port < 0 || sa.Port > 0xFFFF {
+		return nil, 0, EINVAL;
+	}
+	sa.raw.Family = AF_INET;
+	n := sa.raw.setLen()
+	p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port));
+	p[0] = byte(sa.Port>>8);
+	p[1] = byte(sa.Port);
+	for i := 0; i < len(sa.Addr); i++ {
+		sa.raw.Addr[i] = sa.Addr[i];
+	}
+	return (*RawSockaddrAny)(unsafe.Pointer(&sa.raw)), n, 0;
+}
+
+func (sa *SockaddrInet6) sockaddr() (*RawSockaddrAny, Socklen_t, int) {
+	if sa.Port < 0 || sa.Port > 0xFFFF {
+		return nil, 0, EINVAL;
+	}
+	sa.raw.Family = AF_INET6;
+	n := sa.raw.setLen()
+	p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port));
+	p[0] = byte(sa.Port>>8);
+	p[1] = byte(sa.Port);
+	for i := 0; i < len(sa.Addr); i++ {
+		sa.raw.Addr[i] = sa.Addr[i];
+	}
+	return (*RawSockaddrAny)(unsafe.Pointer(&sa.raw)), n, 0;
+}
+
+func (sa *SockaddrUnix) sockaddr() (*RawSockaddrAny, Socklen_t, int) {
+	name := sa.Name;
+	n := len(name);
+	if n >= len(sa.raw.Path) || n == 0 {
+		return nil, 0, EINVAL;
+	}
+	sa.raw.Family = AF_UNIX;
+	sa.raw.setLen(n)
+	for i := 0; i < n; i++ {
+		sa.raw.Path[i] = int8(name[i]);
+	}
+	if sa.raw.Path[0] == '@' {
+		sa.raw.Path[0] = 0;
+	}
+
+	// length is family (uint16), name, NUL.
+	return (*RawSockaddrAny)(unsafe.Pointer(&sa.raw)), 2 + Socklen_t(n) + 1, 0;
+}
+
+func anyToSockaddr(rsa *RawSockaddrAny) (Sockaddr, int) {
+	switch rsa.Addr.Family {
+	case AF_UNIX:
+		pp := (*RawSockaddrUnix)(unsafe.Pointer(rsa))
+		sa := new(SockaddrUnix)
+		n, err := pp.getLen()
+		if err != 0 {
+			return nil, err
+		}
+		bytes := (*[len(pp.Path)]byte)(unsafe.Pointer(&pp.Path[0]));
+		sa.Name = string(bytes[0:n]);
+		return sa, 0;
+
+	case AF_INET:
+		pp := (*RawSockaddrInet4)(unsafe.Pointer(rsa));
+		sa := new(SockaddrInet4);
+		p := (*[2]byte)(unsafe.Pointer(&pp.Port));
+		sa.Port = int(p[0])<<8 + int(p[1]);
+		for i := 0; i < len(sa.Addr); i++ {
+			sa.Addr[i] = pp.Addr[i];
+		}
+		return sa, 0;
+
+	case AF_INET6:
+		pp := (*RawSockaddrInet6)(unsafe.Pointer(rsa));
+		sa := new(SockaddrInet6);
+		p := (*[2]byte)(unsafe.Pointer(&pp.Port));
+		sa.Port = int(p[0])<<8 + int(p[1]);
+		for i := 0; i < len(sa.Addr); i++ {
+			sa.Addr[i] = pp.Addr[i];
+		}
+		return sa, 0;
+	}
+	return nil, EAFNOSUPPORT;
+}
+
+func libc_accept(fd int, sa *RawSockaddrAny, len *Socklen_t) int __asm__ ("accept");
+func libc_bind(fd int, sa *RawSockaddrAny, len Socklen_t) int __asm__ ("bind");
+func libc_connect(fd int, sa *RawSockaddrAny, len Socklen_t) int __asm__ ("connect");
+func libc_socket(domain, typ, protocol int) int __asm__ ("socket");
+func libc_setsockopt(fd, level, optname int, optval *byte, optlen Socklen_t) int __asm__ ("setsockopt");
+func libc_listen(fd, backlog int) int __asm__ ("listen");
+func libc_getsockopt(fd, level, optname int, optval *byte, optlen *Socklen_t) int __asm__ ("getsockopt");
+func libc_getsockname(fd int, sa *RawSockaddrAny, len *Socklen_t) int __asm__ ("getsockname");
+func libc_getpeername(fd int, sa *RawSockaddrAny, len *Socklen_t) int __asm__ ("getpeername");
+func libc_recv(fd int, buf *byte, len Size_t, flags int) Ssize_t __asm__ ("recv");
+func libc_recvfrom(fd int, buf *byte, len Size_t, flags int,
+	from *RawSockaddrAny, fromlen *Socklen_t) Ssize_t __asm__("recvfrom");
+func libc_recvmsg(fd int, msg *Msghdr, flags int) Ssize_t __asm__("recvmsg")
+func libc_send(fd int, buf *byte, len Size_t, flags int) Ssize_t __asm__("send");
+func libc_sendto(fd int, buf *byte, len Size_t, flags int,
+	to *RawSockaddrAny, tolen Socklen_t) Ssize_t __asm__("sendto");
+func libc_sendmsg(fd int, msg *Msghdr, flags int) Ssize_t __asm__("sendmsg")
+func libc_shutdown(fd int, how int) int __asm__ ("shutdown");
+
+func Accept(fd int) (nfd int, sa Sockaddr, errno int) {
+	var rsa RawSockaddrAny;
+	var len Socklen_t = SizeofSockaddrAny;
+	nfd = libc_accept(fd, &rsa, &len);
+	if nfd < 0 {
+		errno = GetErrno();
+		return;
+	}
+	sa, errno = anyToSockaddr(&rsa);
+	if errno != 0 {
+		Close(nfd);
+		nfd = 0;
+	}
+	return;
+}
+
+func Bind(fd int, sa Sockaddr) (errno int) {
+	ptr, n, err := sa.sockaddr();
+	if err != 0 {
+		return err;
+	}
+	if libc_bind(fd, ptr, n) < 0 {
+		errno = GetErrno();
+	}
+	return;
+}
+
+func Connect(fd int, sa Sockaddr) (errno int) {
+	ptr, n, err := sa.sockaddr();
+	if err != 0 {
+		return err;
+	}
+	if libc_connect(fd, ptr, n) < 0 {
+		errno = GetErrno();
+	}
+	return;
+}
+
+func Socket(domain, typ, proto int) (fd, errno int) {
+  if domain == AF_INET6 && SocketDisableIPv6 {
+    return -1, EAFNOSUPPORT
+  }
+  fd = libc_socket(int(domain), int(typ), int(proto));
+  if fd < 0 {
+    errno = GetErrno();
+  }
+  return;
+}
+
+func Listen(fd int, n int) (errno int) {
+  r := libc_listen(int(fd), int(n));
+  if r < 0 { errno = GetErrno() }
+  return;
+}
+
+func setsockopt(fd, level, opt int, valueptr uintptr, length Socklen_t) (errno int) {
+  r := libc_setsockopt(fd, level, opt, (*byte)(unsafe.Pointer(valueptr)),
+		       length);
+  if r < 0 { errno = GetErrno() }
+  return;
+}
+
+func SetsockoptInt(fd, level, opt int, value int) (errno int) {
+	var n = int32(value);
+	return setsockopt(fd, level, opt, uintptr(unsafe.Pointer(&n)), 4);
+}
+
+func SetsockoptTimeval(fd, level, opt int, tv *Timeval) (errno int) {
+	return setsockopt(fd, level, opt, uintptr(unsafe.Pointer(tv)), Socklen_t(unsafe.Sizeof(*tv)));
+}
+
+func SetsockoptLinger(fd, level, opt int, l *Linger) (errno int) {
+	return setsockopt(fd, level, opt, uintptr(unsafe.Pointer(l)), Socklen_t(unsafe.Sizeof(*l)));
+}
+
+func SetsockoptString(fd, level, opt int, s string) (errno int) {
+	return setsockopt(fd, level, opt, uintptr(unsafe.Pointer(&[]byte(s)[0])), Socklen_t(len(s)))
+}
+
+func Getsockname(fd int) (sa Sockaddr, errno int) {
+	var rsa RawSockaddrAny;
+	var len Socklen_t = SizeofSockaddrAny;
+	if libc_getsockname(fd, &rsa, &len) != 0 {
+		errno = GetErrno();
+		return;
+	}
+	return anyToSockaddr(&rsa);
+}
+
+func Getpeername(fd int) (sa Sockaddr, errno int) {
+	var rsa RawSockaddrAny;
+	var len Socklen_t = SizeofSockaddrAny;
+	if libc_getpeername(fd, &rsa, &len) != 0 {
+		errno = GetErrno();
+		return;
+	}
+	return anyToSockaddr(&rsa);
+}
+
+func Recvfrom(fd int, p []byte, flags int) (n int, from Sockaddr, errno int) {
+	var rsa RawSockaddrAny;
+	var slen Socklen_t = SizeofSockaddrAny;
+	var _p0 *byte;
+	if len(p) > 0 { _p0 = &p[0]; }
+	r := libc_recvfrom(fd, _p0, Size_t(len(p)), flags, &rsa, &slen);
+	n = int(r);
+	if r == -1 {
+		errno = GetErrno();
+	} else {
+		from, errno = anyToSockaddr(&rsa);
+	}
+	return;
+}
+
+func (iov *Iovec) SetLen(length int) {
+	iov.Len = Iovec_len_t(length)
+}
+
+func (msghdr *Msghdr) SetControllen(length int) {
+	msghdr.Controllen = Msghdr_controllen_t(length)
+}
+
+func Recvmsg(fd int, p, oob []byte, flags int) (n, oobn int, recvflags int, from Sockaddr, errno int) {
+	var msg Msghdr
+	var rsa RawSockaddrAny
+	msg.Name = (*byte)(unsafe.Pointer(&rsa))
+	msg.Namelen = uint32(SizeofSockaddrAny)
+	var iov Iovec
+	if len(p) > 0 {
+		iov.Base = (*byte)(unsafe.Pointer(&p[0]))
+		iov.SetLen(len(p))
+	}
+	var dummy byte
+	if len(oob) > 0 {
+		// receive at least one normal byte
+		if len(p) == 0 {
+			iov.Base = &dummy
+			iov.SetLen(1)
+		}
+		msg.Control = (*byte)(unsafe.Pointer(&oob[0]))
+		msg.SetControllen(len(oob))
+	}
+	msg.Iov = &iov
+	msg.Iovlen = 1
+	if n, errno = recvmsg(fd, &msg, flags); errno != 0 {
+		return
+	}
+	oobn = int(msg.Controllen)
+	recvflags = int(msg.Flags)
+	// source address is only specified if the socket is unconnected
+	if rsa.Addr.Family != 0 {
+		from, errno = anyToSockaddr(&rsa)
+	}
+	return
+}
+
+func recvmsg(s int, msg *Msghdr, flags int) (n int, errno int) {
+	r := libc_recvmsg(s, msg, flags)
+	if r < 0 {
+		errno = GetErrno()
+	} else {
+		n = int(r)
+	}
+	return
+}
+
+func Sendto(fd int, p []byte, flags int, to Sockaddr) (errno int) {
+	ptr, n, err := to.sockaddr();
+	if err != 0 {
+		return err;
+	}
+	var _p0 *byte;
+	if len(p) > 0 { _p0 = &p[0]; }
+	r := libc_sendto(fd, _p0, Size_t(len(p)), flags, ptr, n);
+	if r == -1 { errno = GetErrno(); }
+	return;
+}
+
+func Sendmsg(fd int, p, oob []byte, to Sockaddr, flags int) (errno int) {
+	var ptr *RawSockaddrAny
+	var nsock Socklen_t
+	if to != nil {
+		var err int
+		ptr, nsock, err = to.sockaddr()
+		if err != 0 {
+			return err
+		}
+	}
+	var msg Msghdr
+	msg.Name = (*byte)(unsafe.Pointer(ptr))
+	msg.Namelen = uint32(nsock)
+	var iov Iovec
+	if len(p) > 0 {
+		iov.Base = (*byte)(unsafe.Pointer(&p[0]))
+		iov.SetLen(len(p))
+	}
+	var dummy byte
+	if len(oob) > 0 {
+		// send at least one normal byte
+		if len(p) == 0 {
+			iov.Base = &dummy
+			iov.SetLen(1)
+		}
+		msg.Control = (*byte)(unsafe.Pointer(&oob[0]))
+		msg.SetControllen(len(oob))
+	}
+	msg.Iov = &iov
+	msg.Iovlen = 1
+	if errno = sendmsg(fd, &msg, flags); errno != 0 {
+		return
+	}
+	return
+}
+
+func sendmsg(s int, msg *Msghdr, flags int) (errno int) {
+	if libc_sendmsg(s, msg, flags) < 0 {
+		errno = GetErrno()
+	}
+	return
+}
+
+func Shutdown(fd int, how int) (errno int) {
+	r := libc_shutdown(fd, how);
+	if r < 0 { errno = GetErrno() }
+	return;
+}
+
+// FIXME: No getsockopt.