1 files changed, 0 insertions, 480 deletions
diff --git a/src/cmd/newlink/pclntab.go b/src/cmd/newlink/pclntab.go
deleted file mode 100644
index 0a4cfc9c46..0000000000
--- a/src/cmd/newlink/pclntab.go
+++ /dev/null
@@ -1,480 +0,0 @@
-// Copyright 2014 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.
-
-// Generation of runtime function information (pclntab).
-
-package main
-
-import (
-	"cmd/internal/goobj"
-	"cmd/internal/obj"
-	"encoding/binary"
-	"os"
-	"sort"
-)
-
-var zerofunc goobj.Func
-
-// pclntab collects the runtime function data for each function that will
-// be listed in the binary and builds a single table describing all functions.
-// This table is used at run time for stack traces and to look up PC-specific
-// information during garbage collection. The symbol created is named
-// "pclntab" for historical reasons; the scope of the table has grown to
-// include more than just PC/line number correspondences.
-// The table format is documented at https://golang.org/s/go12symtab.
-func (p *Prog) pclntab() {
-	// Count number of functions going into the binary,
-	// so that we can size the initial index correctly.
-	nfunc := 0
-	for _, sym := range p.SymOrder {
-		if sym.Kind != goobj.STEXT {
-			continue
-		}
-		nfunc++
-	}
-
-	// Table header.
-	buf := new(SymBuffer)
-	buf.Init(p)
-	buf.SetSize(8 + p.ptrsize)
-	off := 0
-	off = buf.Uint32(off, 0xfffffffb)
-	off = buf.Uint8(off, 0)
-	off = buf.Uint8(off, 0)
-	off = buf.Uint8(off, uint8(p.pcquantum))
-	off = buf.Uint8(off, uint8(p.ptrsize))
-	off = buf.Uint(off, uint64(nfunc), p.ptrsize)
-	indexOff := off
-	off += (nfunc*2 + 1) * p.ptrsize // function index, to be filled in
-	off += 4                         // file table start offset, to be filled in
-	buf.SetSize(off)
-
-	// One-file cache for reading PCData tables from package files.
-	// TODO(rsc): Better I/O strategy.
-	var (
-		file  *os.File
-		fname string
-	)
-
-	// Files gives the file numbering for source file names recorded
-	// in the binary.
-	files := make(map[string]int)
-
-	// Build the table, build the index, and build the file name numbering.
-	// The loop here must visit functions in the same order that they will
-	// be stored in the binary, or else binary search over the index will fail.
-	// The runtime checks that the index is sorted properly at program start time.
-	var lastSym *Sym
-	for _, sym := range p.SymOrder {
-		if sym.Kind != goobj.STEXT {
-			continue
-		}
-		lastSym = sym
-
-		// Treat no recorded function information same as all zeros.
-		f := sym.Func
-		if f == nil {
-			f = &zerofunc
-		}
-
-		// Open package file if needed, for reading PC data.
-		if fname != sym.Package.File {
-			if file != nil {
-				file.Close()
-			}
-			var err error
-			file, err = os.Open(sym.Package.File)
-			if err != nil {
-				p.errorf("%v: %v", sym, err)
-				return
-			}
-			fname = sym.Package.File
-		}
-
-		// off is the offset of the table entry where we're going to write
-		// the encoded form of Func.
-		// indexOff is the current position in the table index;
-		// we add an entry in the index pointing at off.
-		off = (buf.Size() + p.ptrsize - 1) &^ (p.ptrsize - 1)
-		indexOff = buf.Addr(indexOff, sym.SymID, 0)
-		indexOff = buf.Uint(indexOff, uint64(off), p.ptrsize)
-
-		// The Func encoding starts with a header giving offsets
-		// to data blobs, and then the data blobs themselves.
-		// end gives the current write position for the data blobs.
-		end := off + p.ptrsize + 3*4 + 5*4 + len(f.PCData)*4 + len(f.FuncData)*p.ptrsize
-		if len(f.FuncData) > 0 {
-			end += -end & (p.ptrsize - 1)
-		}
-		buf.SetSize(end)
-
-		// entry uintptr
-		// name int32
-		// args int32
-		// frame int32
-		//
-		// The frame recorded in the object file is
-		// the frame size used in an assembly listing, which does
-		// not include the caller PC on the stack.
-		// The frame size we want to list here is the delta from
-		// this function's SP to its caller's SP, which does include
-		// the caller PC. Add p.ptrsize to f.Frame to adjust.
-		// TODO(rsc): Record the same frame size in the object file.
-		off = buf.Addr(off, sym.SymID, 0)
-		off = buf.Uint32(off, uint32(addString(buf, sym.Name)))
-		off = buf.Uint32(off, uint32(f.Args))
-		off = buf.Uint32(off, uint32(f.Frame+p.ptrsize))
-
-		// pcdata
-		off = buf.Uint32(off, uint32(addPCTable(p, buf, file, f.PCSP)))
-		off = buf.Uint32(off, uint32(addPCFileTable(p, buf, file, f.PCFile, sym, files)))
-		off = buf.Uint32(off, uint32(addPCTable(p, buf, file, f.PCLine)))
-		off = buf.Uint32(off, uint32(len(f.PCData)))
-		off = buf.Uint32(off, uint32(len(f.FuncData)))
-		for _, pcdata := range f.PCData {
-			off = buf.Uint32(off, uint32(addPCTable(p, buf, file, pcdata)))
-		}
-
-		// funcdata
-		if len(f.FuncData) > 0 {
-			off += -off & (p.ptrsize - 1) // must be pointer-aligned
-			for _, funcdata := range f.FuncData {
-				if funcdata.Sym.Name == "" {
-					off = buf.Uint(off, uint64(funcdata.Offset), p.ptrsize)
-				} else {
-					off = buf.Addr(off, funcdata.Sym, funcdata.Offset)
-				}
-			}
-		}
-
-		if off != end {
-			p.errorf("internal error: invalid math in pclntab: off=%#x end=%#x", off, end)
-			break
-		}
-	}
-	if file != nil {
-		file.Close()
-	}
-
-	// Final entry of index is end PC of last function.
-	indexOff = buf.Addr(indexOff, lastSym.SymID, int64(lastSym.Size))
-
-	// Start file table.
-	// Function index is immediately followed by offset to file table.
-	off = (buf.Size() + p.ptrsize - 1) &^ (p.ptrsize - 1)
-	buf.Uint32(indexOff, uint32(off))
-
-	// File table is an array of uint32s.
-	// The first entry gives 1+n, the size of the array.
-	// The following n entries hold offsets to string data.
-	// File number n uses the string pointed at by entry n.
-	// File number 0 is invalid.
-	buf.SetSize(off + (1+len(files))*4)
-	buf.Uint32(off, uint32(1+len(files)))
-	var filestr []string
-	for file := range files {
-		filestr = append(filestr, file)
-	}
-	sort.Strings(filestr)
-	for _, file := range filestr {
-		id := files[file]
-		buf.Uint32(off+4*id, uint32(addString(buf, file)))
-	}
-
-	pclntab := &Sym{
-		Sym: &goobj.Sym{
-			SymID: goobj.SymID{Name: "runtime.pclntab"},
-			Kind:  goobj.SPCLNTAB,
-			Size:  buf.Size(),
-			Reloc: buf.Reloc(),
-		},
-		Bytes: buf.Bytes(),
-	}
-	p.addSym(pclntab)
-}
-
-// addString appends the string s to the buffer b.
-// It returns the offset of the beginning of the string in the buffer.
-func addString(b *SymBuffer, s string) int {
-	off := b.Size()
-	b.SetSize(off + len(s) + 1)
-	copy(b.data[off:], s)
-	return off
-}
-
-// addPCTable appends the PC-data table stored in the file f at the location loc
-// to the symbol buffer b. It returns the offset of the beginning of the table
-// in the buffer.
-func addPCTable(p *Prog, b *SymBuffer, f *os.File, loc goobj.Data) int {
-	if loc.Size == 0 {
-		return 0
-	}
-	off := b.Size()
-	b.SetSize(off + int(loc.Size))
-	_, err := f.ReadAt(b.data[off:off+int(loc.Size)], loc.Offset)
-	if err != nil {
-		p.errorf("%v", err)
-	}
-	return off
-}
-
-// addPCFileTable is like addPCTable, but it renumbers the file names referred to by the table
-// to use the global numbering maintained in the files map. It adds new files to the
-// map as necessary.
-func addPCFileTable(p *Prog, b *SymBuffer, f *os.File, loc goobj.Data, sym *Sym, files map[string]int) int {
-	if loc.Size == 0 {
-		return 0
-	}
-	off := b.Size()
-
-	src := make([]byte, loc.Size)
-	_, err := f.ReadAt(src, loc.Offset)
-	if err != nil {
-		p.errorf("%v", err)
-		return 0
-	}
-
-	filenum := make([]int, len(sym.Func.File))
-	for i, name := range sym.Func.File {
-		num := files[name]
-		if num == 0 {
-			num = len(files) + 1
-			files[name] = num
-		}
-		filenum[i] = num
-	}
-
-	var dst []byte
-	newval := int32(-1)
-	var it PCIter
-	for it.Init(p, src); !it.Done; it.Next() {
-		// value delta
-		oldval := it.Value
-		val := oldval
-		if oldval != -1 {
-			if oldval < 0 || int(oldval) >= len(filenum) {
-				p.errorf("%s: corrupt pc-file table", sym)
-				break
-			}
-			val = int32(filenum[oldval])
-		}
-		dv := val - newval
-		newval = val
-		uv := uint32(dv<<1) ^ uint32(dv>>31)
-		dst = appendVarint(dst, uv)
-
-		// pc delta
-		dst = appendVarint(dst, it.NextPC-it.PC)
-	}
-	if it.Corrupt {
-		p.errorf("%s: corrupt pc-file table", sym)
-	}
-
-	// terminating value delta
-	dst = appendVarint(dst, 0)
-
-	b.SetSize(off + len(dst))
-	copy(b.data[off:], dst)
-	return off
-}
-
-// A SymBuffer is a buffer for preparing the data image of a
-// linker-generated symbol.
-type SymBuffer struct {
-	data    []byte
-	reloc   []goobj.Reloc
-	order   binary.ByteOrder
-	ptrsize int
-}
-
-// Init initializes the buffer for writing.
-func (b *SymBuffer) Init(p *Prog) {
-	b.data = nil
-	b.reloc = nil
-	b.order = p.byteorder
-	b.ptrsize = p.ptrsize
-}
-
-// Bytes returns the buffer data.
-func (b *SymBuffer) Bytes() []byte {
-	return b.data
-}
-
-// SetSize sets the buffer's data size to n bytes.
-func (b *SymBuffer) SetSize(n int) {
-	for cap(b.data) < n {
-		b.data = append(b.data[:cap(b.data)], 0)
-	}
-	b.data = b.data[:n]
-}
-
-// Size returns the buffer's data size.
-func (b *SymBuffer) Size() int {
-	return len(b.data)
-}
-
-// Reloc returns the buffered relocations.
-func (b *SymBuffer) Reloc() []goobj.Reloc {
-	return b.reloc
-}
-
-// Uint8 sets the uint8 at offset off to v.
-// It returns the offset just beyond v.
-func (b *SymBuffer) Uint8(off int, v uint8) int {
-	b.data[off] = v
-	return off + 1
-}
-
-// Uint16 sets the uint16 at offset off to v.
-// It returns the offset just beyond v.
-func (b *SymBuffer) Uint16(off int, v uint16) int {
-	b.order.PutUint16(b.data[off:], v)
-	return off + 2
-}
-
-// Uint32 sets the uint32 at offset off to v.
-// It returns the offset just beyond v.
-func (b *SymBuffer) Uint32(off int, v uint32) int {
-	b.order.PutUint32(b.data[off:], v)
-	return off + 4
-}
-
-// Uint64 sets the uint64 at offset off to v.
-// It returns the offset just beyond v.
-func (b *SymBuffer) Uint64(off int, v uint64) int {
-	b.order.PutUint64(b.data[off:], v)
-	return off + 8
-}
-
-// Uint sets the size-byte unsigned integer at offset off to v.
-// It returns the offset just beyond v.
-func (b *SymBuffer) Uint(off int, v uint64, size int) int {
-	switch size {
-	case 1:
-		return b.Uint8(off, uint8(v))
-	case 2:
-		return b.Uint16(off, uint16(v))
-	case 4:
-		return b.Uint32(off, uint32(v))
-	case 8:
-		return b.Uint64(off, v)
-	}
-	panic("invalid use of SymBuffer.SetUint")
-}
-
-// Addr sets the pointer-sized address at offset off to refer
-// to symoff bytes past the start of sym. It returns the offset
-// just beyond the address.
-func (b *SymBuffer) Addr(off int, sym goobj.SymID, symoff int64) int {
-	b.reloc = append(b.reloc, goobj.Reloc{
-		Offset: off,
-		Size:   b.ptrsize,
-		Sym:    sym,
-		Add:    int(symoff),
-		Type:   obj.R_ADDR,
-	})
-	return off + b.ptrsize
-}
-
-// A PCIter implements iteration over PC-data tables.
-//
-//	var it PCIter
-//	for it.Init(p, data); !it.Done; it.Next() {
-//		it.Value holds from it.PC up to (but not including) it.NextPC
-//	}
-//	if it.Corrupt {
-//		data was malformed
-//	}
-//
-type PCIter struct {
-	PC        uint32
-	NextPC    uint32
-	Value     int32
-	Done      bool
-	Corrupt   bool
-	p         []byte
-	start     bool
-	pcquantum uint32
-}
-
-// Init initializes the iteration.
-// On return, if it.Done is true, the iteration is over.
-// Otherwise it.Value applies in the pc range [it.PC, it.NextPC).
-func (it *PCIter) Init(p *Prog, buf []byte) {
-	it.p = buf
-	it.PC = 0
-	it.NextPC = 0
-	it.Value = -1
-	it.start = true
-	it.pcquantum = uint32(p.pcquantum)
-	it.Done = false
-	it.Next()
-}
-
-// Next steps forward one entry in the table.
-// On return, if it.Done is true, the iteration is over.
-// Otherwise it.Value applies in the pc range [it.PC, it.NextPC).
-func (it *PCIter) Next() {
-	it.PC = it.NextPC
-	if it.Done {
-		return
-	}
-	if len(it.p) == 0 {
-		it.Done = true
-		return
-	}
-
-	// value delta
-	uv, p, ok := decodeVarint(it.p)
-	if !ok {
-		it.Done = true
-		it.Corrupt = true
-		return
-	}
-	it.p = p
-	if uv == 0 && !it.start {
-		it.Done = true
-		return
-	}
-	it.start = false
-	sv := int32(uv>>1) ^ int32(uv<<31)>>31
-	it.Value += sv
-
-	// pc delta
-	uv, it.p, ok = decodeVarint(it.p)
-	if !ok {
-		it.Done = true
-		it.Corrupt = true
-		return
-	}
-	it.NextPC = it.PC + uv*it.pcquantum
-}
-
-// decodeVarint decodes an unsigned varint from p,
-// reporting the value, the remainder of the data, and
-// whether the decoding was successful.
-func decodeVarint(p []byte) (v uint32, rest []byte, ok bool) {
-	for shift := uint(0); ; shift += 7 {
-		if len(p) == 0 {
-			return
-		}
-		c := uint32(p[0])
-		p = p[1:]
-		v |= (c & 0x7F) << shift
-		if c&0x80 == 0 {
-			break
-		}
-	}
-	return v, p, true
-}
-
-// appendVarint appends an unsigned varint encoding of v to p
-// and returns the resulting slice.
-func appendVarint(p []byte, v uint32) []byte {
-	for ; v >= 0x80; v >>= 7 {
-		p = append(p, byte(v)|0x80)
-	}
-	p = append(p, byte(v))
-	return p
-}