1 files changed, 102 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/objw/objw.go b/src/cmd/compile/internal/objw/objw.go
new file mode 100644
index 0000000..7774467
--- /dev/null
+++ b/src/cmd/compile/internal/objw/objw.go
@@ -0,0 +1,102 @@
+// 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.
+
+package objw
+
+import (
+	"cmd/compile/internal/base"
+	"cmd/compile/internal/bitvec"
+	"cmd/compile/internal/types"
+	"cmd/internal/obj"
+	"encoding/binary"
+)
+
+// Uint8 writes an unsigned byte v into s at offset off,
+// and returns the next unused offset (i.e., off+1).
+func Uint8(s *obj.LSym, off int, v uint8) int {
+	return UintN(s, off, uint64(v), 1)
+}
+
+func Uint16(s *obj.LSym, off int, v uint16) int {
+	return UintN(s, off, uint64(v), 2)
+}
+
+func Uint32(s *obj.LSym, off int, v uint32) int {
+	return UintN(s, off, uint64(v), 4)
+}
+
+func Uintptr(s *obj.LSym, off int, v uint64) int {
+	return UintN(s, off, v, types.PtrSize)
+}
+
+// Uvarint writes a varint v into s at offset off,
+// and returns the next unused offset.
+func Uvarint(s *obj.LSym, off int, v uint64) int {
+	var buf [binary.MaxVarintLen64]byte
+	n := binary.PutUvarint(buf[:], v)
+	return int(s.WriteBytes(base.Ctxt, int64(off), buf[:n]))
+}
+
+func Bool(s *obj.LSym, off int, v bool) int {
+	w := 0
+	if v {
+		w = 1
+	}
+	return UintN(s, off, uint64(w), 1)
+}
+
+// UintN writes an unsigned integer v of size wid bytes into s at offset off,
+// and returns the next unused offset.
+func UintN(s *obj.LSym, off int, v uint64, wid int) int {
+	if off&(wid-1) != 0 {
+		base.Fatalf("duintxxLSym: misaligned: v=%d wid=%d off=%d", v, wid, off)
+	}
+	s.WriteInt(base.Ctxt, int64(off), wid, int64(v))
+	return off + wid
+}
+
+func SymPtr(s *obj.LSym, off int, x *obj.LSym, xoff int) int {
+	off = int(types.RoundUp(int64(off), int64(types.PtrSize)))
+	s.WriteAddr(base.Ctxt, int64(off), types.PtrSize, x, int64(xoff))
+	off += types.PtrSize
+	return off
+}
+
+func SymPtrWeak(s *obj.LSym, off int, x *obj.LSym, xoff int) int {
+	off = int(types.RoundUp(int64(off), int64(types.PtrSize)))
+	s.WriteWeakAddr(base.Ctxt, int64(off), types.PtrSize, x, int64(xoff))
+	off += types.PtrSize
+	return off
+}
+
+func SymPtrOff(s *obj.LSym, off int, x *obj.LSym) int {
+	s.WriteOff(base.Ctxt, int64(off), x, 0)
+	off += 4
+	return off
+}
+
+func SymPtrWeakOff(s *obj.LSym, off int, x *obj.LSym) int {
+	s.WriteWeakOff(base.Ctxt, int64(off), x, 0)
+	off += 4
+	return off
+}
+
+func Global(s *obj.LSym, width int32, flags int16) {
+	if flags&obj.LOCAL != 0 {
+		s.Set(obj.AttrLocal, true)
+		flags &^= obj.LOCAL
+	}
+	base.Ctxt.Globl(s, int64(width), int(flags))
+}
+
+// BitVec writes the contents of bv into s as sequence of bytes
+// in little-endian order, and returns the next unused offset.
+func BitVec(s *obj.LSym, off int, bv bitvec.BitVec) int {
+	// Runtime reads the bitmaps as byte arrays. Oblige.
+	for j := 0; int32(j) < bv.N; j += 8 {
+		word := bv.B[j/32]
+		off = Uint8(s, off, uint8(word>>(uint(j)%32)))
+	}
+	return off
+}