| // Inferno utils/5l/asm.c |
| // https://bitbucket.org/inferno-os/inferno-os/src/default/utils/5l/asm.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 mips64 |
| |
| import ( |
| "cmd/internal/objabi" |
| "cmd/internal/sys" |
| "cmd/link/internal/ld" |
| "cmd/link/internal/loader" |
| "cmd/link/internal/sym" |
| "debug/elf" |
| "fmt" |
| ) |
| |
| func gentext(ctxt *ld.Link, ldr *loader.Loader) {} |
| |
| func elfreloc1(ctxt *ld.Link, ldr *loader.Loader, s loader.Sym, r loader.ExtRelocView, sectoff int64) bool { |
| |
| // mips64 ELF relocation (endian neutral) |
| // offset uint64 |
| // sym uint32 |
| // ssym uint8 |
| // type3 uint8 |
| // type2 uint8 |
| // type uint8 |
| // addend int64 |
| |
| ctxt.Out.Write64(uint64(sectoff)) |
| |
| elfsym := ld.ElfSymForReloc(ctxt, r.Xsym) |
| ctxt.Out.Write32(uint32(elfsym)) |
| ctxt.Out.Write8(0) |
| ctxt.Out.Write8(0) |
| ctxt.Out.Write8(0) |
| switch r.Type() { |
| default: |
| return false |
| case objabi.R_ADDR, objabi.R_DWARFSECREF: |
| switch r.Siz() { |
| case 4: |
| ctxt.Out.Write8(uint8(elf.R_MIPS_32)) |
| case 8: |
| ctxt.Out.Write8(uint8(elf.R_MIPS_64)) |
| default: |
| return false |
| } |
| case objabi.R_ADDRMIPS: |
| ctxt.Out.Write8(uint8(elf.R_MIPS_LO16)) |
| case objabi.R_ADDRMIPSU: |
| ctxt.Out.Write8(uint8(elf.R_MIPS_HI16)) |
| case objabi.R_ADDRMIPSTLS: |
| ctxt.Out.Write8(uint8(elf.R_MIPS_TLS_TPREL_LO16)) |
| case objabi.R_CALLMIPS, |
| objabi.R_JMPMIPS: |
| ctxt.Out.Write8(uint8(elf.R_MIPS_26)) |
| } |
| ctxt.Out.Write64(uint64(r.Xadd)) |
| |
| 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.ExtRelocView, int64) bool { |
| return false |
| } |
| |
| func archreloc(target *ld.Target, ldr *loader.Loader, syms *ld.ArchSyms, r loader.Reloc2, rr *loader.ExtReloc, s loader.Sym, val int64) (o int64, needExtReloc bool, ok bool) { |
| rs := r.Sym() |
| rs = ldr.ResolveABIAlias(rs) |
| if target.IsExternal() { |
| switch r.Type() { |
| default: |
| return val, false, false |
| |
| case objabi.R_ADDRMIPS, |
| objabi.R_ADDRMIPSU: |
| // set up addend for eventual relocation via outer symbol. |
| rs, off := ld.FoldSubSymbolOffset(ldr, rs) |
| rr.Xadd = r.Add() + off |
| 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)) |
| } |
| rr.Xsym = rs |
| return val, true, true |
| |
| case objabi.R_ADDRMIPSTLS, |
| objabi.R_CALLMIPS, |
| objabi.R_JMPMIPS: |
| rr.Xsym = rs |
| rr.Xadd = r.Add() |
| return val, true, true |
| } |
| } |
| |
| const isOk = true |
| const noExtReloc = false |
| switch r.Type() { |
| case objabi.R_ADDRMIPS, |
| objabi.R_ADDRMIPSU: |
| t := ldr.SymValue(rs) + r.Add() |
| o1 := target.Arch.ByteOrder.Uint32(ldr.OutData(s)[r.Off():]) |
| if r.Type() == objabi.R_ADDRMIPS { |
| return int64(o1&0xffff0000 | uint32(t)&0xffff), noExtReloc, isOk |
| } |
| return int64(o1&0xffff0000 | uint32((t+1<<15)>>16)&0xffff), noExtReloc, isOk |
| case objabi.R_ADDRMIPSTLS: |
| // thread pointer is at 0x7000 offset from the start of TLS data area |
| t := ldr.SymValue(rs) + r.Add() - 0x7000 |
| if t < -32768 || t >= 32678 { |
| ldr.Errorf(s, "TLS offset out of range %d", t) |
| } |
| o1 := target.Arch.ByteOrder.Uint32(ldr.OutData(s)[r.Off():]) |
| return int64(o1&0xffff0000 | uint32(t)&0xffff), noExtReloc, isOk |
| case objabi.R_CALLMIPS, |
| objabi.R_JMPMIPS: |
| // Low 26 bits = (S + A) >> 2 |
| t := ldr.SymValue(rs) + r.Add() |
| o1 := target.Arch.ByteOrder.Uint32(ldr.OutData(s)[r.Off():]) |
| return int64(o1&0xfc000000 | uint32(t>>2)&^0xfc000000), noExtReloc, isOk |
| } |
| |
| return val, false, false |
| } |
| |
| func archrelocvariant(*ld.Target, *loader.Loader, loader.Reloc2, sym.RelocVariant, loader.Sym, int64) int64 { |
| return -1 |
| } |
| |
| func asmb2(ctxt *ld.Link, _ *loader.Loader) { |
| /* output symbol table */ |
| ld.Symsize = 0 |
| |
| ld.Lcsize = 0 |
| symo := uint32(0) |
| if !*ld.FlagS { |
| // TODO: rationalize |
| switch ctxt.HeadType { |
| default: |
| if ctxt.IsELF { |
| symo = uint32(ld.Segdwarf.Fileoff + ld.Segdwarf.Filelen) |
| symo = uint32(ld.Rnd(int64(symo), int64(*ld.FlagRound))) |
| } |
| |
| case objabi.Hplan9: |
| symo = uint32(ld.Segdata.Fileoff + ld.Segdata.Filelen) |
| } |
| |
| ctxt.Out.SeekSet(int64(symo)) |
| switch ctxt.HeadType { |
| default: |
| if ctxt.IsELF { |
| ld.Asmelfsym(ctxt) |
| ctxt.Out.Write(ld.Elfstrdat) |
| |
| if ctxt.LinkMode == ld.LinkExternal { |
| ld.Elfemitreloc(ctxt) |
| } |
| } |
| |
| case objabi.Hplan9: |
| ld.Asmplan9sym(ctxt) |
| } |
| } |
| |
| ctxt.Out.SeekSet(0) |
| switch ctxt.HeadType { |
| default: |
| case objabi.Hplan9: /* plan 9 */ |
| magic := uint32(4*18*18 + 7) |
| if ctxt.Arch == sys.ArchMIPS64LE { |
| magic = uint32(4*26*26 + 7) |
| } |
| ctxt.Out.Write32(magic) /* magic */ |
| ctxt.Out.Write32(uint32(ld.Segtext.Filelen)) /* sizes */ |
| ctxt.Out.Write32(uint32(ld.Segdata.Filelen)) |
| ctxt.Out.Write32(uint32(ld.Segdata.Length - ld.Segdata.Filelen)) |
| ctxt.Out.Write32(uint32(ld.Symsize)) /* nsyms */ |
| ctxt.Out.Write32(uint32(ld.Entryvalue(ctxt))) /* va of entry */ |
| ctxt.Out.Write32(0) |
| ctxt.Out.Write32(uint32(ld.Lcsize)) |
| |
| case objabi.Hlinux, |
| objabi.Hfreebsd, |
| objabi.Hnetbsd, |
| objabi.Hopenbsd: |
| ld.Asmbelf(ctxt, int64(symo)) |
| } |
| |
| 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)) |
| } |
| } |
