func readsym(b *bufio.Reader, s *liblink.LSym) {
if !undef[s] {
panic("double-def")
}
delete(undef, s)
s.Name = rdstring(b)
s.Extname = rdstring(b)
s.Type_ = int16(rdint(b))
s.Version = int16(rdint(b))
s.Dupok = uint8(rdint(b))
s.External = uint8(rdint(b))
s.Nosplit = uint8(rdint(b))
s.Reachable = uint8(rdint(b))
s.Cgoexport = uint8(rdint(b))
s.Special = uint8(rdint(b))
s.Stkcheck = uint8(rdint(b))
s.Hide = uint8(rdint(b))
s.Leaf = uint8(rdint(b))
s.Fnptr = uint8(rdint(b))
s.Seenglobl = uint8(rdint(b))
s.Onlist = uint8(rdint(b))
s.Symid = int16(rdint(b))
s.Dynid = int32(rdint(b))
s.Sig = int32(rdint(b))
s.Plt = int32(rdint(b))
s.Got = int32(rdint(b))
s.Align = int32(rdint(b))
s.Elfsym = int32(rdint(b))
s.Args = int32(rdint(b))
s.Locals = int32(rdint(b))
s.Value = rdint(b)
s.Size = rdint(b)
hashed[rdsym(b)] = true
s.Allsym = rdsym(b)
s.Next = rdsym(b)
s.Sub = rdsym(b)
s.Outer = rdsym(b)
s.Gotype = rdsym(b)
s.Reachparent = rdsym(b)
s.Queue = rdsym(b)
s.File = rdstring(b)
s.Dynimplib = rdstring(b)
s.Dynimpvers = rdstring(b)
s.Text = rdprog(b)
s.Etext = rdprog(b)
n := int(rdint(b))
if n > 0 {
s.P = make([]byte, n)
io.ReadFull(b, s.P)
}
s.R = make([]liblink.Reloc, int(rdint(b)))
for i := range s.R {
r := &s.R[i]
r.Off = int32(rdint(b))
r.Siz = uint8(rdint(b))
r.Done = uint8(rdint(b))
r.Type_ = int32(rdint(b))
r.Add = rdint(b)
r.Xadd = rdint(b)
r.Sym = rdsym(b)
r.Xsym = rdsym(b)
}
}
func progedit(ctxt *liblink.Link, p *liblink.Prog) {
var literal string
var s *liblink.LSym
p.From.Class = 0
p.To.Class = 0
// Rewrite BR/BL to symbol as D_BRANCH.
switch p.As {
case ABR,
ABL,
ARETURN,
ADUFFZERO,
ADUFFCOPY:
if p.To.Sym != nil {
p.To.Type_ = D_BRANCH
}
break
}
// Rewrite float constants to values stored in memory.
switch p.As {
case AFMOVS:
if p.From.Type_ == D_FCONST {
var i32 uint32
var f32 float32
f32 = float32(p.From.U.Dval)
i32 = math.Float32bits(f32)
literal = fmt.Sprintf("$f32.%08x", i32)
s = liblink.Linklookup(ctxt, literal, 0)
s.Size = 4
p.From.Type_ = D_OREG
p.From.Sym = s
p.From.Name = D_EXTERN
p.From.Offset = 0
}
case AFMOVD:
if p.From.Type_ == D_FCONST {
var i64 uint64
i64 = math.Float64bits(p.From.U.Dval)
literal = fmt.Sprintf("$f64.%016x", i64)
s = liblink.Linklookup(ctxt, literal, 0)
s.Size = 8
p.From.Type_ = D_OREG
p.From.Sym = s
p.From.Name = D_EXTERN
p.From.Offset = 0
}
// Put >32-bit constants in memory and load them
case AMOVD:
if p.From.Type_ == D_CONST && p.From.Name == D_NONE && p.From.Reg == NREG && int64(int32(p.From.Offset)) != p.From.Offset {
literal = fmt.Sprintf("$i64.%016x", uint64(p.From.Offset))
s = liblink.Linklookup(ctxt, literal, 0)
s.Size = 8
p.From.Type_ = D_OREG
p.From.Sym = s
p.From.Name = D_EXTERN
p.From.Offset = 0
}
}
// Rewrite SUB constants into ADD.
switch p.As {
case ASUBC:
if p.From.Type_ == D_CONST {
p.From.Offset = -p.From.Offset
p.As = AADDC
}
case ASUBCCC:
if p.From.Type_ == D_CONST {
p.From.Offset = -p.From.Offset
p.As = AADDCCC
}
case ASUB:
if p.From.Type_ == D_CONST {
p.From.Offset = -p.From.Offset
p.As = AADD
}
break
}
}