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// Copyright 2019 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 riscv64
import (
"cmd/internal/obj/riscv"
"cmd/internal/objabi"
"cmd/internal/sys"
"cmd/link/internal/ld"
"cmd/link/internal/sym"
"fmt"
"log"
)
func gentext(ctxt *ld.Link) {
}
func adddynrela(ctxt *ld.Link, rel *sym.Symbol, s *sym.Symbol, r *sym.Reloc) {
log.Fatalf("adddynrela not implemented")
}
func adddynrel(ctxt *ld.Link, s *sym.Symbol, r *sym.Reloc) bool {
log.Fatalf("adddynrel not implemented")
return false
}
func elfreloc1(ctxt *ld.Link, r *sym.Reloc, sectoff int64) bool {
log.Fatalf("elfreloc1")
return false
}
func elfsetupplt(ctxt *ld.Link) {
log.Fatalf("elfsetuplt")
}
func machoreloc1(arch *sys.Arch, out *ld.OutBuf, s *sym.Symbol, r *sym.Reloc, sectoff int64) bool {
log.Fatalf("machoreloc1 not implemented")
return false
}
func archreloc(ctxt *ld.Link, r *sym.Reloc, s *sym.Symbol, val int64) (int64, bool) {
switch r.Type {
case objabi.R_CALLRISCV:
// Nothing to do.
return val, true
case objabi.R_RISCV_PCREL_ITYPE, objabi.R_RISCV_PCREL_STYPE:
pc := s.Value + int64(r.Off)
off := ld.Symaddr(r.Sym) + r.Add - pc
// Generate AUIPC and second instruction immediates.
low, high, err := riscv.Split32BitImmediate(off)
if err != nil {
ld.Errorf(s, "R_RISCV_PCREL_ relocation does not fit in 32-bits: %d", off)
}
auipcImm, err := riscv.EncodeUImmediate(high)
if err != nil {
ld.Errorf(s, "cannot encode R_RISCV_PCREL_ AUIPC relocation offset for %s: %v", r.Sym.Name, err)
}
var secondImm, secondImmMask int64
switch r.Type {
case objabi.R_RISCV_PCREL_ITYPE:
secondImmMask = riscv.ITypeImmMask
secondImm, err = riscv.EncodeIImmediate(low)
if err != nil {
ld.Errorf(s, "cannot encode R_RISCV_PCREL_ITYPE I-type instruction relocation offset for %s: %v", r.Sym.Name, err)
}
case objabi.R_RISCV_PCREL_STYPE:
secondImmMask = riscv.STypeImmMask
secondImm, err = riscv.EncodeSImmediate(low)
if err != nil {
ld.Errorf(s, "cannot encode R_RISCV_PCREL_STYPE S-type instruction relocation offset for %s: %v", r.Sym.Name, err)
}
default:
panic(fmt.Sprintf("Unknown relocation type: %v", r.Type))
}
auipc := int64(uint32(val))
second := int64(uint32(val >> 32))
auipc = (auipc &^ riscv.UTypeImmMask) | int64(uint32(auipcImm))
second = (second &^ secondImmMask) | int64(uint32(secondImm))
return second<<32 | auipc, true
}
return val, false
}
func archrelocvariant(ctxt *ld.Link, r *sym.Reloc, s *sym.Symbol, t int64) int64 {
log.Fatalf("archrelocvariant")
return -1
}
func asmb(ctxt *ld.Link) {
if ctxt.IsELF {
ld.Asmbelfsetup()
}
sect := ld.Segtext.Sections[0]
ctxt.Out.SeekSet(int64(sect.Vaddr - ld.Segtext.Vaddr + ld.Segtext.Fileoff))
ld.Codeblk(ctxt, int64(sect.Vaddr), int64(sect.Length))
for _, sect = range ld.Segtext.Sections[1:] {
ctxt.Out.SeekSet(int64(sect.Vaddr - ld.Segtext.Vaddr + ld.Segtext.Fileoff))
ld.Datblk(ctxt, int64(sect.Vaddr), int64(sect.Length))
}
if ld.Segrodata.Filelen > 0 {
ctxt.Out.SeekSet(int64(ld.Segrodata.Fileoff))
ld.Datblk(ctxt, int64(ld.Segrodata.Vaddr), int64(ld.Segrodata.Filelen))
}
if ld.Segrelrodata.Filelen > 0 {
ctxt.Out.SeekSet(int64(ld.Segrelrodata.Fileoff))
ld.Datblk(ctxt, int64(ld.Segrelrodata.Vaddr), int64(ld.Segrelrodata.Filelen))
}
ctxt.Out.SeekSet(int64(ld.Segdata.Fileoff))
ld.Datblk(ctxt, int64(ld.Segdata.Vaddr), int64(ld.Segdata.Filelen))
ctxt.Out.SeekSet(int64(ld.Segdwarf.Fileoff))
ld.Dwarfblk(ctxt, int64(ld.Segdwarf.Vaddr), int64(ld.Segdwarf.Filelen))
}
func asmb2(ctxt *ld.Link) {
ld.Symsize = 0
ld.Lcsize = 0
symo := uint32(0)
if !*ld.FlagS {
if !ctxt.IsELF {
ld.Errorf(nil, "unsupported executable format")
}
symo = uint32(ld.Segdwarf.Fileoff + ld.Segdwarf.Filelen)
symo = uint32(ld.Rnd(int64(symo), int64(*ld.FlagRound)))
ctxt.Out.SeekSet(int64(symo))
ld.Asmelfsym(ctxt)
ctxt.Out.Flush()
ctxt.Out.Write(ld.Elfstrdat)
if ctxt.LinkMode == ld.LinkExternal {
ld.Elfemitreloc(ctxt)
}
}
ctxt.Out.SeekSet(0)
switch ctxt.HeadType {
case objabi.Hlinux:
ld.Asmbelf(ctxt, int64(symo))
default:
ld.Errorf(nil, "unsupported operating system")
}
ctxt.Out.Flush()
if *ld.FlagC {
fmt.Printf("textsize=%d\n", ld.Segtext.Filelen)
fmt.Printf("datsize=%d\n", ld.Segdata.Filelen)
fmt.Printf("bsssize=%d\n", ld.Segdata.Length-ld.Segdata.Filelen)
fmt.Printf("symsize=%d\n", ld.Symsize)
fmt.Printf("lcsize=%d\n", ld.Lcsize)
fmt.Printf("total=%d\n", ld.Segtext.Filelen+ld.Segdata.Length+uint64(ld.Symsize)+uint64(ld.Lcsize))
}
}
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