| // 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 |
| } |