--- /dev/null
+// Copyright 2022 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 loong64
+
+import (
+ "cmd/internal/objabi"
+ "cmd/internal/sys"
+ "cmd/link/internal/ld"
+ "cmd/link/internal/loader"
+ "cmd/link/internal/sym"
+ "debug/elf"
+ "log"
+)
+
+func gentext(ctxt *ld.Link, ldr *loader.Loader) {}
+
+func adddynrel(target *ld.Target, ldr *loader.Loader, syms *ld.ArchSyms, s loader.Sym, r loader.Reloc, rIdx int) bool {
+ log.Fatalf("adddynrel not implemented")
+ return false
+}
+
+func elfreloc1(ctxt *ld.Link, out *ld.OutBuf, ldr *loader.Loader, s loader.Sym, r loader.ExtReloc, ri int, sectoff int64) bool {
+ // loong64 ELF relocation (endian neutral)
+ // offset uint64
+ // symreloc uint64 // The high 32-bit is the symbol, the low 32-bit is the relocation type.
+ // addend int64
+
+ elfsym := ld.ElfSymForReloc(ctxt, r.Xsym)
+ switch r.Type {
+ default:
+ return false
+ case objabi.R_ADDR, objabi.R_DWARFSECREF:
+ switch r.Size {
+ case 4:
+ out.Write64(uint64(sectoff))
+ out.Write64(uint64(elf.R_LARCH_32) | uint64(elfsym)<<32)
+ out.Write64(uint64(r.Xadd))
+ case 8:
+ out.Write64(uint64(sectoff))
+ out.Write64(uint64(elf.R_LARCH_64) | uint64(elfsym)<<32)
+ out.Write64(uint64(r.Xadd))
+ default:
+ return false
+ }
+ case objabi.R_ADDRLOONG64TLS:
+ out.Write64(uint64(sectoff))
+ out.Write64(uint64(elf.R_LARCH_SOP_PUSH_TLS_TPREL) | uint64(elfsym)<<32)
+ out.Write64(uint64(r.Xadd))
+
+ out.Write64(uint64(sectoff))
+ out.Write64(uint64(elf.R_LARCH_SOP_PUSH_ABSOLUTE))
+ out.Write64(uint64(0xfff))
+
+ out.Write64(uint64(sectoff))
+ out.Write64(uint64(elf.R_LARCH_SOP_AND))
+ out.Write64(uint64(0x0))
+
+ out.Write64(uint64(sectoff))
+ out.Write64(uint64(elf.R_LARCH_SOP_POP_32_U_10_12))
+ out.Write64(uint64(0x0))
+
+ case objabi.R_ADDRLOONG64TLSU:
+ out.Write64(uint64(sectoff))
+ out.Write64(uint64(elf.R_LARCH_SOP_PUSH_TLS_TPREL) | uint64(elfsym)<<32)
+ out.Write64(uint64(r.Xadd))
+
+ out.Write64(uint64(sectoff))
+ out.Write64(uint64(elf.R_LARCH_SOP_PUSH_ABSOLUTE))
+ out.Write64(uint64(0xc))
+
+ out.Write64(uint64(sectoff))
+ out.Write64(uint64(elf.R_LARCH_SOP_SR))
+ out.Write64(uint64(0x0))
+
+ out.Write64(uint64(sectoff))
+ out.Write64(uint64(elf.R_LARCH_SOP_POP_32_S_5_20) | uint64(0)<<32)
+ out.Write64(uint64(0x0))
+
+ case objabi.R_CALLLOONG64:
+ out.Write64(uint64(sectoff))
+ out.Write64(uint64(elf.R_LARCH_SOP_PUSH_PLT_PCREL) | uint64(elfsym)<<32)
+ out.Write64(uint64(r.Xadd))
+
+ out.Write64(uint64(sectoff))
+ out.Write64(uint64(elf.R_LARCH_SOP_POP_32_S_0_10_10_16_S2))
+ out.Write64(uint64(0x0))
+ // The pcaddu12i + addi.d instructions is used to obtain address of a symbol on Loong64.
+ // The low 12-bit of the symbol address need to be added. The addi.d instruction have
+ // signed 12-bit immediate operand. The 0x800 (addr+U12 <=> addr+0x800+S12) is introduced
+ // to do sign extending from 12 bits. The 0x804 is 0x800 + 4, 4 is instruction bit
+ // width on Loong64 and is used to correct the PC of the addi.d instruction.
+ case objabi.R_ADDRLOONG64:
+ out.Write64(uint64(sectoff))
+ out.Write64(uint64(elf.R_LARCH_SOP_PUSH_PCREL) | uint64(elfsym)<<32)
+ out.Write64(uint64(r.Xadd + 0x4))
+
+ out.Write64(uint64(sectoff))
+ out.Write64(uint64(elf.R_LARCH_SOP_PUSH_PCREL) | uint64(elfsym)<<32)
+ out.Write64(uint64(r.Xadd + 0x804))
+
+ out.Write64(uint64(sectoff))
+ out.Write64(uint64(elf.R_LARCH_SOP_PUSH_ABSOLUTE))
+ out.Write64(uint64(0xc))
+
+ out.Write64(uint64(sectoff))
+ out.Write64(uint64(elf.R_LARCH_SOP_SR))
+ out.Write64(uint64(0x0))
+
+ out.Write64(uint64(sectoff))
+ out.Write64(uint64(elf.R_LARCH_SOP_PUSH_ABSOLUTE))
+ out.Write64(uint64(0xc))
+
+ out.Write64(uint64(sectoff))
+ out.Write64(uint64(elf.R_LARCH_SOP_SL))
+ out.Write64(uint64(0x0))
+
+ out.Write64(uint64(sectoff))
+ out.Write64(uint64(elf.R_LARCH_SOP_SUB))
+ out.Write64(uint64(0x0))
+
+ out.Write64(uint64(sectoff))
+ out.Write64(uint64(elf.R_LARCH_SOP_POP_32_S_10_12))
+ out.Write64(uint64(0x0))
+
+ case objabi.R_ADDRLOONG64U:
+ out.Write64(uint64(sectoff))
+ out.Write64(uint64(elf.R_LARCH_SOP_PUSH_PCREL) | uint64(elfsym)<<32)
+ out.Write64(uint64(r.Xadd + 0x800))
+
+ out.Write64(uint64(sectoff))
+ out.Write64(uint64(elf.R_LARCH_SOP_PUSH_ABSOLUTE))
+ out.Write64(uint64(0xc))
+
+ out.Write64(uint64(sectoff))
+ out.Write64(uint64(elf.R_LARCH_SOP_SR))
+ out.Write64(uint64(0x0))
+
+ out.Write64(uint64(sectoff))
+ out.Write64(uint64(elf.R_LARCH_SOP_POP_32_S_5_20) | uint64(0)<<32)
+ out.Write64(uint64(0x0))
+ }
+
+ return true
+}
+
+func elfsetupplt(ctxt *ld.Link, plt, gotplt *loader.SymbolBuilder, dynamic loader.Sym) {
+ return
+}
+
+func machoreloc1(*sys.Arch, *ld.OutBuf, *loader.Loader, loader.Sym, loader.ExtReloc, int64) bool {
+ return false
+}
+
+func archreloc(target *ld.Target, ldr *loader.Loader, syms *ld.ArchSyms, r loader.Reloc, s loader.Sym, val int64) (o int64, nExtReloc int, ok bool) {
+ rs := r.Sym()
+ if target.IsExternal() {
+ nExtReloc := 0
+ switch r.Type() {
+ default:
+ return val, 0, false
+ case objabi.R_ADDRLOONG64,
+ objabi.R_ADDRLOONG64U:
+ // set up addend for eventual relocation via outer symbol.
+ rs, _ := ld.FoldSubSymbolOffset(ldr, rs)
+ rst := ldr.SymType(rs)
+ if rst != sym.SHOSTOBJ && rst != sym.SDYNIMPORT && ldr.SymSect(rs) == nil {
+ ldr.Errorf(s, "missing section for %s", ldr.SymName(rs))
+ }
+ nExtReloc = 8 // need 8 ELF relocations. see elfreloc1
+ if r.Type() == objabi.R_ADDRLOONG64U {
+ nExtReloc = 4
+ }
+ return val, nExtReloc, true
+ case objabi.R_ADDRLOONG64TLS,
+ objabi.R_ADDRLOONG64TLSU,
+ objabi.R_CALLLOONG64,
+ objabi.R_JMPLOONG64:
+ nExtReloc = 4
+ if r.Type() == objabi.R_CALLLOONG64 || r.Type() == objabi.R_JMPLOONG64 {
+ nExtReloc = 2
+ }
+ return val, nExtReloc, true
+ }
+ }
+
+ const isOk = true
+ const noExtReloc = 0
+
+ switch r.Type() {
+ case objabi.R_CONST:
+ return r.Add(), noExtReloc, isOk
+ case objabi.R_GOTOFF:
+ return ldr.SymValue(r.Sym()) + r.Add() - ldr.SymValue(syms.GOT), noExtReloc, isOk
+ case objabi.R_ADDRLOONG64,
+ objabi.R_ADDRLOONG64U:
+ pc := ldr.SymValue(s) + int64(r.Off())
+ t := ldr.SymAddr(rs) + r.Add() - pc
+ if r.Type() == objabi.R_ADDRLOONG64 {
+ return int64(val&0xffc003ff | (((t + 4 - ((t + 4 + 1<<11) >> 12 << 12)) << 10) & 0x3ffc00)), noExtReloc, isOk
+ }
+ return int64(val&0xfe00001f | (((t + 1<<11) >> 12 << 5) & 0x1ffffe0)), noExtReloc, isOk
+ case objabi.R_ADDRLOONG64TLS,
+ objabi.R_ADDRLOONG64TLSU:
+ t := ldr.SymAddr(rs) + r.Add()
+ if r.Type() == objabi.R_ADDRLOONG64TLS {
+ return int64(val&0xffc003ff | ((t & 0xfff) << 10)), noExtReloc, isOk
+ }
+ return int64(val&0xfe00001f | (((t) >> 12 << 5) & 0x1ffffe0)), noExtReloc, isOk
+ case objabi.R_CALLLOONG64,
+ objabi.R_JMPLOONG64:
+ pc := ldr.SymValue(s) + int64(r.Off())
+ t := ldr.SymAddr(rs) + r.Add() - pc
+ return int64(val&0xfc000000 | (((t >> 2) & 0xffff) << 10) | (((t >> 2) & 0x3ff0000) >> 16)), noExtReloc, isOk
+ }
+
+ return val, 0, false
+}
+
+func archrelocvariant(*ld.Target, *loader.Loader, loader.Reloc, sym.RelocVariant, loader.Sym, int64, []byte) int64 {
+ return -1
+}
+
+func extreloc(target *ld.Target, ldr *loader.Loader, r loader.Reloc, s loader.Sym) (loader.ExtReloc, bool) {
+ switch r.Type() {
+ case objabi.R_ADDRLOONG64,
+ objabi.R_ADDRLOONG64U:
+ return ld.ExtrelocViaOuterSym(ldr, r, s), true
+
+ case objabi.R_ADDRLOONG64TLS,
+ objabi.R_ADDRLOONG64TLSU,
+ objabi.R_CONST,
+ objabi.R_GOTOFF,
+ objabi.R_CALLLOONG64,
+ objabi.R_JMPLOONG64:
+ return ld.ExtrelocSimple(ldr, r), true
+ }
+ return loader.ExtReloc{}, false
+}