Adding upstream version 1.18.10.upstream/1.18.10upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 207 insertions, 0 deletions

diff --git a/src/cmd/internal/obj/data.go b/src/cmd/internal/obj/data.go
new file mode 100644
index 0000000..bcba53c
--- /dev/null
+++ b/src/cmd/internal/obj/data.go
@@ -0,0 +1,207 @@
+// Derived from Inferno utils/6l/obj.c and utils/6l/span.c
+// https://bitbucket.org/inferno-os/inferno-os/src/master/utils/6l/obj.c
+// https://bitbucket.org/inferno-os/inferno-os/src/master/utils/6l/span.c
+//
+//	Copyright © 1994-1999 Lucent Technologies Inc.  All rights reserved.
+//	Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
+//	Portions Copyright © 1997-1999 Vita Nuova Limited
+//	Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
+//	Portions Copyright © 2004,2006 Bruce Ellis
+//	Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
+//	Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
+//	Portions Copyright © 2009 The Go Authors. All rights reserved.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+package obj
+
+import (
+	"cmd/internal/objabi"
+	"log"
+	"math"
+)
+
+// Grow increases the length of s.P to lsiz.
+func (s *LSym) Grow(lsiz int64) {
+	siz := int(lsiz)
+	if int64(siz) != lsiz {
+		log.Fatalf("LSym.Grow size %d too long", lsiz)
+	}
+	if len(s.P) >= siz {
+		return
+	}
+	s.P = append(s.P, make([]byte, siz-len(s.P))...)
+}
+
+// GrowCap increases the capacity of s.P to c.
+func (s *LSym) GrowCap(c int64) {
+	if int64(cap(s.P)) >= c {
+		return
+	}
+	if s.P == nil {
+		s.P = make([]byte, 0, c)
+		return
+	}
+	b := make([]byte, len(s.P), c)
+	copy(b, s.P)
+	s.P = b
+}
+
+// prepwrite prepares to write data of size siz into s at offset off.
+func (s *LSym) prepwrite(ctxt *Link, off int64, siz int) {
+	if off < 0 || siz < 0 || off >= 1<<30 {
+		ctxt.Diag("prepwrite: bad off=%d siz=%d s=%v", off, siz, s)
+	}
+	switch s.Type {
+	case objabi.Sxxx, objabi.SBSS:
+		s.Type = objabi.SDATA
+	case objabi.SNOPTRBSS:
+		s.Type = objabi.SNOPTRDATA
+	case objabi.STLSBSS:
+		ctxt.Diag("cannot supply data for %v var %v", s.Type, s.Name)
+	}
+	l := off + int64(siz)
+	s.Grow(l)
+	if l > s.Size {
+		s.Size = l
+	}
+}
+
+// WriteFloat32 writes f into s at offset off.
+func (s *LSym) WriteFloat32(ctxt *Link, off int64, f float32) {
+	s.prepwrite(ctxt, off, 4)
+	ctxt.Arch.ByteOrder.PutUint32(s.P[off:], math.Float32bits(f))
+}
+
+// WriteFloat64 writes f into s at offset off.
+func (s *LSym) WriteFloat64(ctxt *Link, off int64, f float64) {
+	s.prepwrite(ctxt, off, 8)
+	ctxt.Arch.ByteOrder.PutUint64(s.P[off:], math.Float64bits(f))
+}
+
+// WriteInt writes an integer i of size siz into s at offset off.
+func (s *LSym) WriteInt(ctxt *Link, off int64, siz int, i int64) {
+	s.prepwrite(ctxt, off, siz)
+	switch siz {
+	default:
+		ctxt.Diag("WriteInt: bad integer size: %d", siz)
+	case 1:
+		s.P[off] = byte(i)
+	case 2:
+		ctxt.Arch.ByteOrder.PutUint16(s.P[off:], uint16(i))
+	case 4:
+		ctxt.Arch.ByteOrder.PutUint32(s.P[off:], uint32(i))
+	case 8:
+		ctxt.Arch.ByteOrder.PutUint64(s.P[off:], uint64(i))
+	}
+}
+
+func (s *LSym) writeAddr(ctxt *Link, off int64, siz int, rsym *LSym, roff int64, rtype objabi.RelocType) {
+	// Allow 4-byte addresses for DWARF.
+	if siz != ctxt.Arch.PtrSize && siz != 4 {
+		ctxt.Diag("WriteAddr: bad address size %d in %s", siz, s.Name)
+	}
+	s.prepwrite(ctxt, off, siz)
+	r := Addrel(s)
+	r.Off = int32(off)
+	if int64(r.Off) != off {
+		ctxt.Diag("WriteAddr: off overflow %d in %s", off, s.Name)
+	}
+	r.Siz = uint8(siz)
+	r.Sym = rsym
+	r.Type = rtype
+	r.Add = roff
+}
+
+// WriteAddr writes an address of size siz into s at offset off.
+// rsym and roff specify the relocation for the address.
+func (s *LSym) WriteAddr(ctxt *Link, off int64, siz int, rsym *LSym, roff int64) {
+	s.writeAddr(ctxt, off, siz, rsym, roff, objabi.R_ADDR)
+}
+
+// WriteWeakAddr writes an address of size siz into s at offset off.
+// rsym and roff specify the relocation for the address.
+// This is a weak reference.
+func (s *LSym) WriteWeakAddr(ctxt *Link, off int64, siz int, rsym *LSym, roff int64) {
+	s.writeAddr(ctxt, off, siz, rsym, roff, objabi.R_WEAKADDR)
+}
+
+// WriteCURelativeAddr writes a pointer-sized address into s at offset off.
+// rsym and roff specify the relocation for the address which will be
+// resolved by the linker to an offset from the DW_AT_low_pc attribute of
+// the DWARF Compile Unit of rsym.
+func (s *LSym) WriteCURelativeAddr(ctxt *Link, off int64, rsym *LSym, roff int64) {
+	s.writeAddr(ctxt, off, ctxt.Arch.PtrSize, rsym, roff, objabi.R_ADDRCUOFF)
+}
+
+// WriteOff writes a 4 byte offset to rsym+roff into s at offset off.
+// After linking the 4 bytes stored at s+off will be
+// rsym+roff-(start of section that s is in).
+func (s *LSym) WriteOff(ctxt *Link, off int64, rsym *LSym, roff int64) {
+	s.prepwrite(ctxt, off, 4)
+	r := Addrel(s)
+	r.Off = int32(off)
+	if int64(r.Off) != off {
+		ctxt.Diag("WriteOff: off overflow %d in %s", off, s.Name)
+	}
+	r.Siz = 4
+	r.Sym = rsym
+	r.Type = objabi.R_ADDROFF
+	r.Add = roff
+}
+
+// WriteWeakOff writes a weak 4 byte offset to rsym+roff into s at offset off.
+// After linking the 4 bytes stored at s+off will be
+// rsym+roff-(start of section that s is in).
+func (s *LSym) WriteWeakOff(ctxt *Link, off int64, rsym *LSym, roff int64) {
+	s.prepwrite(ctxt, off, 4)
+	r := Addrel(s)
+	r.Off = int32(off)
+	if int64(r.Off) != off {
+		ctxt.Diag("WriteOff: off overflow %d in %s", off, s.Name)
+	}
+	r.Siz = 4
+	r.Sym = rsym
+	r.Type = objabi.R_WEAKADDROFF
+	r.Add = roff
+}
+
+// WriteString writes a string of size siz into s at offset off.
+func (s *LSym) WriteString(ctxt *Link, off int64, siz int, str string) {
+	if siz < len(str) {
+		ctxt.Diag("WriteString: bad string size: %d < %d", siz, len(str))
+	}
+	s.prepwrite(ctxt, off, siz)
+	copy(s.P[off:off+int64(siz)], str)
+}
+
+// WriteBytes writes a slice of bytes into s at offset off.
+func (s *LSym) WriteBytes(ctxt *Link, off int64, b []byte) int64 {
+	s.prepwrite(ctxt, off, len(b))
+	copy(s.P[off:], b)
+	return off + int64(len(b))
+}
+
+func Addrel(s *LSym) *Reloc {
+	if s.R == nil {
+		s.R = make([]Reloc, 0, 4)
+	}
+	s.R = append(s.R, Reloc{})
+	return &s.R[len(s.R)-1]
+}