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objw.go
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prog.go
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Editing: objw.go
// 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" ) // 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) } // 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.Rnd(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.Rnd(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 }
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