libgo: Update to current Go library.

From-SVN: r172106

1 files changed, 34 insertions, 0 deletions

diff --git a/libgo/syscalls/syscall_unix.go b/libgo/syscalls/syscall_unix.go
index a29b6b5..b5a660e 100644
--- a/libgo/syscalls/syscall_unix.go
+++ b/libgo/syscalls/syscall_unix.go
@@ -4,6 +4,8 @@
 
 package syscall
 
+import "unsafe"
+
 var (
 	Stdin  = 0
 	Stdout = 1
@@ -22,3 +24,35 @@ func Uname(buf *Utsname) (errno int) {
 	}
 	return
 }
+
+var mapper = &mmapper{
+	active: make(map[*byte][]byte),
+	mmap:   mmap,
+	munmap: munmap,
+}
+
+func Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, errno int) {
+	return mapper.Mmap(fd, offset, length, prot, flags)
+}
+
+func Munmap(b []byte) (errno int) {
+	return mapper.Munmap(b)
+}
+
+func libc_munmap(*byte, Size_t) int __asm__ ("munmap")
+
+func mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, errno int) {
+	r0 := libc_mmap((*byte)(unsafe.Pointer(addr)), Size_t(length), prot, flag, fd, Offset_t(pos))
+	ret = uintptr(unsafe.Pointer(r0))
+	if ret + 1 == 0 {
+		errno = GetErrno()
+	}
+	return
+}
+
+func munmap(addr uintptr, length uintptr) (errno int) {
+	if libc_munmap((*byte)(unsafe.Pointer(addr)), Size_t(length)) < 0 {
+		errno = GetErrno()
+	}
+	return
+}