| // Inferno utils/5l/asm.c |
| // http://code.google.com/p/inferno-os/source/browse/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 main |
| |
| import ( |
| "cmd/internal/ld" |
| "cmd/internal/obj" |
| "fmt" |
| "log" |
| ) |
| |
| func needlib(name string) int { |
| if name[0] == '\x00' { |
| return 0 |
| } |
| |
| /* reuse hash code in symbol table */ |
| p := fmt.Sprintf(".dynlib.%s", name) |
| |
| s := ld.Linklookup(ld.Ctxt, p, 0) |
| |
| if s.Type == 0 { |
| s.Type = 100 // avoid SDATA, etc. |
| return 1 |
| } |
| |
| return 0 |
| } |
| |
| func gentext() { |
| } |
| |
| // Preserve highest 8 bits of a, and do addition to lower 24-bit |
| // of a and b; used to adjust ARM branch intruction's target |
| func braddoff(a int32, b int32) int32 { |
| return int32((uint32(a))&0xff000000 | 0x00ffffff&uint32(a+b)) |
| } |
| |
| func adddynrela(rel *ld.LSym, s *ld.LSym, r *ld.Reloc) { |
| ld.Addaddrplus(ld.Ctxt, rel, s, int64(r.Off)) |
| ld.Adduint32(ld.Ctxt, rel, ld.R_ARM_RELATIVE) |
| } |
| |
| func adddynrel(s *ld.LSym, r *ld.Reloc) { |
| targ := r.Sym |
| ld.Ctxt.Cursym = s |
| |
| switch r.Type { |
| default: |
| if r.Type >= 256 { |
| ld.Diag("unexpected relocation type %d", r.Type) |
| return |
| } |
| |
| // Handle relocations found in ELF object files. |
| case 256 + ld.R_ARM_PLT32: |
| r.Type = ld.R_CALLARM |
| |
| if targ.Type == ld.SDYNIMPORT { |
| addpltsym(ld.Ctxt, targ) |
| r.Sym = ld.Linklookup(ld.Ctxt, ".plt", 0) |
| r.Add = int64(braddoff(int32(r.Add), targ.Plt/4)) |
| } |
| |
| return |
| |
| case 256 + ld.R_ARM_THM_PC22: // R_ARM_THM_CALL |
| ld.Diag("R_ARM_THM_CALL, are you using -marm?") |
| |
| ld.Errorexit() |
| return |
| |
| case 256 + ld.R_ARM_GOT32: // R_ARM_GOT_BREL |
| if targ.Type != ld.SDYNIMPORT { |
| addgotsyminternal(ld.Ctxt, targ) |
| } else { |
| addgotsym(ld.Ctxt, targ) |
| } |
| |
| r.Type = ld.R_CONST // write r->add during relocsym |
| r.Sym = nil |
| r.Add += int64(targ.Got) |
| return |
| |
| case 256 + ld.R_ARM_GOT_PREL: // GOT(nil) + A - nil |
| if targ.Type != ld.SDYNIMPORT { |
| addgotsyminternal(ld.Ctxt, targ) |
| } else { |
| addgotsym(ld.Ctxt, targ) |
| } |
| |
| r.Type = ld.R_PCREL |
| r.Sym = ld.Linklookup(ld.Ctxt, ".got", 0) |
| r.Add += int64(targ.Got) + 4 |
| return |
| |
| case 256 + ld.R_ARM_GOTOFF: // R_ARM_GOTOFF32 |
| r.Type = ld.R_GOTOFF |
| |
| return |
| |
| case 256 + ld.R_ARM_GOTPC: // R_ARM_BASE_PREL |
| r.Type = ld.R_PCREL |
| |
| r.Sym = ld.Linklookup(ld.Ctxt, ".got", 0) |
| r.Add += 4 |
| return |
| |
| case 256 + ld.R_ARM_CALL: |
| r.Type = ld.R_CALLARM |
| if targ.Type == ld.SDYNIMPORT { |
| addpltsym(ld.Ctxt, targ) |
| r.Sym = ld.Linklookup(ld.Ctxt, ".plt", 0) |
| r.Add = int64(braddoff(int32(r.Add), targ.Plt/4)) |
| } |
| |
| return |
| |
| case 256 + ld.R_ARM_REL32: // R_ARM_REL32 |
| r.Type = ld.R_PCREL |
| |
| r.Add += 4 |
| return |
| |
| case 256 + ld.R_ARM_ABS32: |
| if targ.Type == ld.SDYNIMPORT { |
| ld.Diag("unexpected R_ARM_ABS32 relocation for dynamic symbol %s", targ.Name) |
| } |
| r.Type = ld.R_ADDR |
| return |
| |
| // we can just ignore this, because we are targeting ARM V5+ anyway |
| case 256 + ld.R_ARM_V4BX: |
| if r.Sym != nil { |
| // R_ARM_V4BX is ABS relocation, so this symbol is a dummy symbol, ignore it |
| r.Sym.Type = 0 |
| } |
| |
| r.Sym = nil |
| return |
| |
| case 256 + ld.R_ARM_PC24, |
| 256 + ld.R_ARM_JUMP24: |
| r.Type = ld.R_CALLARM |
| if targ.Type == ld.SDYNIMPORT { |
| addpltsym(ld.Ctxt, targ) |
| r.Sym = ld.Linklookup(ld.Ctxt, ".plt", 0) |
| r.Add = int64(braddoff(int32(r.Add), targ.Plt/4)) |
| } |
| |
| return |
| } |
| |
| // Handle references to ELF symbols from our own object files. |
| if targ.Type != ld.SDYNIMPORT { |
| return |
| } |
| |
| switch r.Type { |
| case ld.R_CALLARM: |
| addpltsym(ld.Ctxt, targ) |
| r.Sym = ld.Linklookup(ld.Ctxt, ".plt", 0) |
| r.Add = int64(targ.Plt) |
| return |
| |
| case ld.R_ADDR: |
| if s.Type != ld.SDATA { |
| break |
| } |
| if ld.Iself { |
| adddynsym(ld.Ctxt, targ) |
| rel := ld.Linklookup(ld.Ctxt, ".rel", 0) |
| ld.Addaddrplus(ld.Ctxt, rel, s, int64(r.Off)) |
| ld.Adduint32(ld.Ctxt, rel, ld.ELF32_R_INFO(uint32(targ.Dynid), ld.R_ARM_GLOB_DAT)) // we need a nil + A dynmic reloc |
| r.Type = ld.R_CONST // write r->add during relocsym |
| r.Sym = nil |
| return |
| } |
| } |
| |
| ld.Ctxt.Cursym = s |
| ld.Diag("unsupported relocation for dynamic symbol %s (type=%d stype=%d)", targ.Name, r.Type, targ.Type) |
| } |
| |
| func elfreloc1(r *ld.Reloc, sectoff int64) int { |
| ld.Thearch.Lput(uint32(sectoff)) |
| |
| elfsym := r.Xsym.Elfsym |
| switch r.Type { |
| default: |
| return -1 |
| |
| case ld.R_ADDR: |
| if r.Siz == 4 { |
| ld.Thearch.Lput(ld.R_ARM_ABS32 | uint32(elfsym)<<8) |
| } else { |
| return -1 |
| } |
| |
| case ld.R_PCREL: |
| if r.Siz == 4 { |
| ld.Thearch.Lput(ld.R_ARM_REL32 | uint32(elfsym)<<8) |
| } else { |
| return -1 |
| } |
| |
| case ld.R_CALLARM: |
| if r.Siz == 4 { |
| if r.Add&0xff000000 == 0xeb000000 { // BL |
| ld.Thearch.Lput(ld.R_ARM_CALL | uint32(elfsym)<<8) |
| } else { |
| ld.Thearch.Lput(ld.R_ARM_JUMP24 | uint32(elfsym)<<8) |
| } |
| } else { |
| return -1 |
| } |
| |
| case ld.R_TLS: |
| if r.Siz == 4 { |
| if ld.Flag_shared != 0 { |
| ld.Thearch.Lput(ld.R_ARM_TLS_IE32 | uint32(elfsym)<<8) |
| } else { |
| ld.Thearch.Lput(ld.R_ARM_TLS_LE32 | uint32(elfsym)<<8) |
| } |
| } else { |
| return -1 |
| } |
| } |
| |
| return 0 |
| } |
| |
| func elfsetupplt() { |
| plt := ld.Linklookup(ld.Ctxt, ".plt", 0) |
| got := ld.Linklookup(ld.Ctxt, ".got.plt", 0) |
| if plt.Size == 0 { |
| // str lr, [sp, #-4]! |
| ld.Adduint32(ld.Ctxt, plt, 0xe52de004) |
| |
| // ldr lr, [pc, #4] |
| ld.Adduint32(ld.Ctxt, plt, 0xe59fe004) |
| |
| // add lr, pc, lr |
| ld.Adduint32(ld.Ctxt, plt, 0xe08fe00e) |
| |
| // ldr pc, [lr, #8]! |
| ld.Adduint32(ld.Ctxt, plt, 0xe5bef008) |
| |
| // .word &GLOBAL_OFFSET_TABLE[0] - . |
| ld.Addpcrelplus(ld.Ctxt, plt, got, 4) |
| |
| // the first .plt entry requires 3 .plt.got entries |
| ld.Adduint32(ld.Ctxt, got, 0) |
| |
| ld.Adduint32(ld.Ctxt, got, 0) |
| ld.Adduint32(ld.Ctxt, got, 0) |
| } |
| } |
| |
| func machoreloc1(r *ld.Reloc, sectoff int64) int { |
| var v uint32 |
| |
| rs := r.Xsym |
| |
| if rs.Type == ld.SHOSTOBJ || r.Type == ld.R_CALLARM { |
| if rs.Dynid < 0 { |
| ld.Diag("reloc %d to non-macho symbol %s type=%d", r.Type, rs.Name, rs.Type) |
| return -1 |
| } |
| |
| v = uint32(rs.Dynid) |
| v |= 1 << 27 // external relocation |
| } else { |
| v = uint32((rs.Sect.(*ld.Section)).Extnum) |
| if v == 0 { |
| ld.Diag("reloc %d to symbol %s in non-macho section %s type=%d", r.Type, rs.Name, (rs.Sect.(*ld.Section)).Name, rs.Type) |
| return -1 |
| } |
| } |
| |
| switch r.Type { |
| default: |
| return -1 |
| |
| case ld.R_ADDR: |
| v |= ld.MACHO_GENERIC_RELOC_VANILLA << 28 |
| |
| case ld.R_CALLARM: |
| v |= 1 << 24 // pc-relative bit |
| v |= ld.MACHO_ARM_RELOC_BR24 << 28 |
| } |
| |
| switch r.Siz { |
| default: |
| return -1 |
| |
| case 1: |
| v |= 0 << 25 |
| |
| case 2: |
| v |= 1 << 25 |
| |
| case 4: |
| v |= 2 << 25 |
| |
| case 8: |
| v |= 3 << 25 |
| } |
| |
| ld.Thearch.Lput(uint32(sectoff)) |
| ld.Thearch.Lput(v) |
| return 0 |
| } |
| |
| func archreloc(r *ld.Reloc, s *ld.LSym, val *int64) int { |
| if ld.Linkmode == ld.LinkExternal { |
| switch r.Type { |
| case ld.R_CALLARM: |
| r.Done = 0 |
| |
| // set up addend for eventual relocation via outer symbol. |
| rs := r.Sym |
| |
| r.Xadd = r.Add |
| if r.Xadd&0x800000 != 0 { |
| r.Xadd |= ^0xffffff |
| } |
| r.Xadd *= 4 |
| for rs.Outer != nil { |
| r.Xadd += ld.Symaddr(rs) - ld.Symaddr(rs.Outer) |
| rs = rs.Outer |
| } |
| |
| if rs.Type != ld.SHOSTOBJ && rs.Sect == nil { |
| ld.Diag("missing section for %s", rs.Name) |
| } |
| r.Xsym = rs |
| |
| // ld64 for arm seems to want the symbol table to contain offset |
| // into the section rather than pseudo virtual address that contains |
| // the section load address. |
| // we need to compensate that by removing the instruction's address |
| // from addend. |
| if ld.HEADTYPE == ld.Hdarwin { |
| r.Xadd -= ld.Symaddr(s) + int64(r.Off) |
| } |
| |
| *val = int64(braddoff(int32(0xff000000&uint32(r.Add)), int32(0xffffff&uint32(r.Xadd/4)))) |
| return 0 |
| } |
| |
| return -1 |
| } |
| |
| switch r.Type { |
| case ld.R_CONST: |
| *val = r.Add |
| return 0 |
| |
| case ld.R_GOTOFF: |
| *val = ld.Symaddr(r.Sym) + r.Add - ld.Symaddr(ld.Linklookup(ld.Ctxt, ".got", 0)) |
| return 0 |
| |
| // The following three arch specific relocations are only for generation of |
| // Linux/ARM ELF's PLT entry (3 assembler instruction) |
| case ld.R_PLT0: // add ip, pc, #0xXX00000 |
| if ld.Symaddr(ld.Linklookup(ld.Ctxt, ".got.plt", 0)) < ld.Symaddr(ld.Linklookup(ld.Ctxt, ".plt", 0)) { |
| ld.Diag(".got.plt should be placed after .plt section.") |
| } |
| *val = 0xe28fc600 + (0xff & (int64(uint32(ld.Symaddr(r.Sym)-(ld.Symaddr(ld.Linklookup(ld.Ctxt, ".plt", 0))+int64(r.Off))+r.Add)) >> 20)) |
| return 0 |
| |
| case ld.R_PLT1: // add ip, ip, #0xYY000 |
| *val = 0xe28cca00 + (0xff & (int64(uint32(ld.Symaddr(r.Sym)-(ld.Symaddr(ld.Linklookup(ld.Ctxt, ".plt", 0))+int64(r.Off))+r.Add+4)) >> 12)) |
| |
| return 0 |
| |
| case ld.R_PLT2: // ldr pc, [ip, #0xZZZ]! |
| *val = 0xe5bcf000 + (0xfff & int64(uint32(ld.Symaddr(r.Sym)-(ld.Symaddr(ld.Linklookup(ld.Ctxt, ".plt", 0))+int64(r.Off))+r.Add+8))) |
| |
| return 0 |
| |
| case ld.R_CALLARM: // bl XXXXXX or b YYYYYY |
| *val = int64(braddoff(int32(0xff000000&uint32(r.Add)), int32(0xffffff&uint32((ld.Symaddr(r.Sym)+int64((uint32(r.Add))*4)-(s.Value+int64(r.Off)))/4)))) |
| |
| return 0 |
| } |
| |
| return -1 |
| } |
| |
| func archrelocvariant(r *ld.Reloc, s *ld.LSym, t int64) int64 { |
| log.Fatalf("unexpected relocation variant") |
| return t |
| } |
| |
| func addpltreloc(ctxt *ld.Link, plt *ld.LSym, got *ld.LSym, sym *ld.LSym, typ int) *ld.Reloc { |
| r := ld.Addrel(plt) |
| r.Sym = got |
| r.Off = int32(plt.Size) |
| r.Siz = 4 |
| r.Type = int32(typ) |
| r.Add = int64(sym.Got) - 8 |
| |
| plt.Reachable = true |
| plt.Size += 4 |
| ld.Symgrow(ctxt, plt, plt.Size) |
| |
| return r |
| } |
| |
| func addpltsym(ctxt *ld.Link, s *ld.LSym) { |
| if s.Plt >= 0 { |
| return |
| } |
| |
| adddynsym(ctxt, s) |
| |
| if ld.Iself { |
| plt := ld.Linklookup(ctxt, ".plt", 0) |
| got := ld.Linklookup(ctxt, ".got.plt", 0) |
| rel := ld.Linklookup(ctxt, ".rel.plt", 0) |
| if plt.Size == 0 { |
| elfsetupplt() |
| } |
| |
| // .got entry |
| s.Got = int32(got.Size) |
| |
| // In theory, all GOT should point to the first PLT entry, |
| // Linux/ARM's dynamic linker will do that for us, but FreeBSD/ARM's |
| // dynamic linker won't, so we'd better do it ourselves. |
| ld.Addaddrplus(ctxt, got, plt, 0) |
| |
| // .plt entry, this depends on the .got entry |
| s.Plt = int32(plt.Size) |
| |
| addpltreloc(ctxt, plt, got, s, ld.R_PLT0) // add lr, pc, #0xXX00000 |
| addpltreloc(ctxt, plt, got, s, ld.R_PLT1) // add lr, lr, #0xYY000 |
| addpltreloc(ctxt, plt, got, s, ld.R_PLT2) // ldr pc, [lr, #0xZZZ]! |
| |
| // rel |
| ld.Addaddrplus(ctxt, rel, got, int64(s.Got)) |
| |
| ld.Adduint32(ctxt, rel, ld.ELF32_R_INFO(uint32(s.Dynid), ld.R_ARM_JUMP_SLOT)) |
| } else { |
| ld.Diag("addpltsym: unsupported binary format") |
| } |
| } |
| |
| func addgotsyminternal(ctxt *ld.Link, s *ld.LSym) { |
| if s.Got >= 0 { |
| return |
| } |
| |
| got := ld.Linklookup(ctxt, ".got", 0) |
| s.Got = int32(got.Size) |
| |
| ld.Addaddrplus(ctxt, got, s, 0) |
| |
| if ld.Iself { |
| } else { |
| ld.Diag("addgotsyminternal: unsupported binary format") |
| } |
| } |
| |
| func addgotsym(ctxt *ld.Link, s *ld.LSym) { |
| if s.Got >= 0 { |
| return |
| } |
| |
| adddynsym(ctxt, s) |
| got := ld.Linklookup(ctxt, ".got", 0) |
| s.Got = int32(got.Size) |
| ld.Adduint32(ctxt, got, 0) |
| |
| if ld.Iself { |
| rel := ld.Linklookup(ctxt, ".rel", 0) |
| ld.Addaddrplus(ctxt, rel, got, int64(s.Got)) |
| ld.Adduint32(ctxt, rel, ld.ELF32_R_INFO(uint32(s.Dynid), ld.R_ARM_GLOB_DAT)) |
| } else { |
| ld.Diag("addgotsym: unsupported binary format") |
| } |
| } |
| |
| func adddynsym(ctxt *ld.Link, s *ld.LSym) { |
| if s.Dynid >= 0 { |
| return |
| } |
| |
| if ld.Iself { |
| s.Dynid = int32(ld.Nelfsym) |
| ld.Nelfsym++ |
| |
| d := ld.Linklookup(ctxt, ".dynsym", 0) |
| |
| /* name */ |
| name := s.Extname |
| |
| ld.Adduint32(ctxt, d, uint32(ld.Addstring(ld.Linklookup(ctxt, ".dynstr", 0), name))) |
| |
| /* value */ |
| if s.Type == ld.SDYNIMPORT { |
| ld.Adduint32(ctxt, d, 0) |
| } else { |
| ld.Addaddr(ctxt, d, s) |
| } |
| |
| /* size */ |
| ld.Adduint32(ctxt, d, 0) |
| |
| /* type */ |
| t := ld.STB_GLOBAL << 4 |
| |
| if (s.Cgoexport&ld.CgoExportDynamic != 0) && s.Type&ld.SMASK == ld.STEXT { |
| t |= ld.STT_FUNC |
| } else { |
| t |= ld.STT_OBJECT |
| } |
| ld.Adduint8(ctxt, d, uint8(t)) |
| ld.Adduint8(ctxt, d, 0) |
| |
| /* shndx */ |
| if s.Type == ld.SDYNIMPORT { |
| ld.Adduint16(ctxt, d, ld.SHN_UNDEF) |
| } else { |
| ld.Adduint16(ctxt, d, 1) |
| } |
| } else { |
| ld.Diag("adddynsym: unsupported binary format") |
| } |
| } |
| |
| func adddynlib(lib string) { |
| if needlib(lib) == 0 { |
| return |
| } |
| |
| if ld.Iself { |
| s := ld.Linklookup(ld.Ctxt, ".dynstr", 0) |
| if s.Size == 0 { |
| ld.Addstring(s, "") |
| } |
| ld.Elfwritedynent(ld.Linklookup(ld.Ctxt, ".dynamic", 0), ld.DT_NEEDED, uint64(ld.Addstring(s, lib))) |
| } else if ld.HEADTYPE == ld.Hdarwin { |
| ld.Machoadddynlib(lib) |
| } else { |
| ld.Diag("adddynlib: unsupported binary format") |
| } |
| } |
| |
| func asmb() { |
| if ld.Debug['v'] != 0 { |
| fmt.Fprintf(&ld.Bso, "%5.2f asmb\n", obj.Cputime()) |
| } |
| ld.Bflush(&ld.Bso) |
| |
| if ld.Iself { |
| ld.Asmbelfsetup() |
| } |
| |
| sect := ld.Segtext.Sect |
| ld.Cseek(int64(sect.Vaddr - ld.Segtext.Vaddr + ld.Segtext.Fileoff)) |
| ld.Codeblk(int64(sect.Vaddr), int64(sect.Length)) |
| for sect = sect.Next; sect != nil; sect = sect.Next { |
| ld.Cseek(int64(sect.Vaddr - ld.Segtext.Vaddr + ld.Segtext.Fileoff)) |
| ld.Datblk(int64(sect.Vaddr), int64(sect.Length)) |
| } |
| |
| if ld.Segrodata.Filelen > 0 { |
| if ld.Debug['v'] != 0 { |
| fmt.Fprintf(&ld.Bso, "%5.2f rodatblk\n", obj.Cputime()) |
| } |
| ld.Bflush(&ld.Bso) |
| |
| ld.Cseek(int64(ld.Segrodata.Fileoff)) |
| ld.Datblk(int64(ld.Segrodata.Vaddr), int64(ld.Segrodata.Filelen)) |
| } |
| |
| if ld.Debug['v'] != 0 { |
| fmt.Fprintf(&ld.Bso, "%5.2f datblk\n", obj.Cputime()) |
| } |
| ld.Bflush(&ld.Bso) |
| |
| ld.Cseek(int64(ld.Segdata.Fileoff)) |
| ld.Datblk(int64(ld.Segdata.Vaddr), int64(ld.Segdata.Filelen)) |
| |
| machlink := uint32(0) |
| if ld.HEADTYPE == ld.Hdarwin { |
| if ld.Debug['v'] != 0 { |
| fmt.Fprintf(&ld.Bso, "%5.2f dwarf\n", obj.Cputime()) |
| } |
| |
| if ld.Debug['w'] == 0 { // TODO(minux): enable DWARF Support |
| dwarfoff := uint32(ld.Rnd(int64(uint64(ld.HEADR)+ld.Segtext.Length), int64(ld.INITRND)) + ld.Rnd(int64(ld.Segdata.Filelen), int64(ld.INITRND))) |
| ld.Cseek(int64(dwarfoff)) |
| |
| ld.Segdwarf.Fileoff = uint64(ld.Cpos()) |
| ld.Dwarfemitdebugsections() |
| ld.Segdwarf.Filelen = uint64(ld.Cpos()) - ld.Segdwarf.Fileoff |
| } |
| |
| machlink = uint32(ld.Domacholink()) |
| } |
| |
| /* output symbol table */ |
| ld.Symsize = 0 |
| |
| ld.Lcsize = 0 |
| symo := uint32(0) |
| if ld.Debug['s'] == 0 { |
| // TODO: rationalize |
| if ld.Debug['v'] != 0 { |
| fmt.Fprintf(&ld.Bso, "%5.2f sym\n", obj.Cputime()) |
| } |
| ld.Bflush(&ld.Bso) |
| switch ld.HEADTYPE { |
| default: |
| if ld.Iself { |
| symo = uint32(ld.Segdata.Fileoff + ld.Segdata.Filelen) |
| symo = uint32(ld.Rnd(int64(symo), int64(ld.INITRND))) |
| } |
| |
| case ld.Hplan9: |
| symo = uint32(ld.Segdata.Fileoff + ld.Segdata.Filelen) |
| |
| case ld.Hdarwin: |
| symo = uint32(ld.Rnd(int64(uint64(ld.HEADR)+ld.Segtext.Filelen), int64(ld.INITRND)) + ld.Rnd(int64(ld.Segdata.Filelen), int64(ld.INITRND)) + int64(machlink)) |
| } |
| |
| ld.Cseek(int64(symo)) |
| switch ld.HEADTYPE { |
| default: |
| if ld.Iself { |
| if ld.Debug['v'] != 0 { |
| fmt.Fprintf(&ld.Bso, "%5.2f elfsym\n", obj.Cputime()) |
| } |
| ld.Asmelfsym() |
| ld.Cflush() |
| ld.Cwrite(ld.Elfstrdat) |
| |
| if ld.Debug['v'] != 0 { |
| fmt.Fprintf(&ld.Bso, "%5.2f dwarf\n", obj.Cputime()) |
| } |
| ld.Dwarfemitdebugsections() |
| |
| if ld.Linkmode == ld.LinkExternal { |
| ld.Elfemitreloc() |
| } |
| } |
| |
| case ld.Hplan9: |
| ld.Asmplan9sym() |
| ld.Cflush() |
| |
| sym := ld.Linklookup(ld.Ctxt, "pclntab", 0) |
| if sym != nil { |
| ld.Lcsize = int32(len(sym.P)) |
| for i := 0; int32(i) < ld.Lcsize; i++ { |
| ld.Cput(uint8(sym.P[i])) |
| } |
| |
| ld.Cflush() |
| } |
| |
| case ld.Hdarwin: |
| if ld.Linkmode == ld.LinkExternal { |
| ld.Machoemitreloc() |
| } |
| } |
| } |
| |
| ld.Ctxt.Cursym = nil |
| if ld.Debug['v'] != 0 { |
| fmt.Fprintf(&ld.Bso, "%5.2f header\n", obj.Cputime()) |
| } |
| ld.Bflush(&ld.Bso) |
| ld.Cseek(0) |
| switch ld.HEADTYPE { |
| default: |
| case ld.Hplan9: /* plan 9 */ |
| ld.Thearch.Lput(0x647) /* magic */ |
| ld.Thearch.Lput(uint32(ld.Segtext.Filelen)) /* sizes */ |
| ld.Thearch.Lput(uint32(ld.Segdata.Filelen)) |
| ld.Thearch.Lput(uint32(ld.Segdata.Length - ld.Segdata.Filelen)) |
| ld.Thearch.Lput(uint32(ld.Symsize)) /* nsyms */ |
| ld.Thearch.Lput(uint32(ld.Entryvalue())) /* va of entry */ |
| ld.Thearch.Lput(0) |
| ld.Thearch.Lput(uint32(ld.Lcsize)) |
| |
| case ld.Hlinux, |
| ld.Hfreebsd, |
| ld.Hnetbsd, |
| ld.Hopenbsd, |
| ld.Hnacl: |
| ld.Asmbelf(int64(symo)) |
| |
| case ld.Hdarwin: |
| ld.Asmbmacho() |
| } |
| |
| ld.Cflush() |
| if ld.Debug['c'] != 0 { |
| 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)) |
| } |
| } |
