func gentext() {
if !ld.DynlinkingGo() {
return
}
addmoduledata := ld.Linklookup(ld.Ctxt, "runtime.addmoduledata", 0)
if addmoduledata.Type == ld.STEXT {
// we're linking a module containing the runtime -> no need for
// an init function
return
}
addmoduledata.Reachable = true
initfunc := ld.Linklookup(ld.Ctxt, "go.link.addmoduledata", 0)
initfunc.Type = ld.STEXT
initfunc.Local = true
initfunc.Reachable = true
o := func(op ...uint8) {
for _, op1 := range op {
ld.Adduint8(ld.Ctxt, initfunc, op1)
}
}
// 0000000000000000 <local.dso_init>:
// 0: 48 8d 3d 00 00 00 00 lea 0x0(%rip),%rdi # 7 <local.dso_init+0x7>
// 3: R_X86_64_PC32 runtime.firstmoduledata-0x4
o(0x48, 0x8d, 0x3d)
ld.Addpcrelplus(ld.Ctxt, initfunc, ld.Linklookup(ld.Ctxt, "runtime.firstmoduledata", 0), 0)
// 7: e8 00 00 00 00 callq c <local.dso_init+0xc>
// 8: R_X86_64_PLT32 runtime.addmoduledata-0x4
o(0xe8)
Addcall(ld.Ctxt, initfunc, addmoduledata)
// c: c3 retq
o(0xc3)
if ld.Ctxt.Etextp != nil {
ld.Ctxt.Etextp.Next = initfunc
} else {
ld.Ctxt.Textp = initfunc
}
ld.Ctxt.Etextp = initfunc
initarray_entry := ld.Linklookup(ld.Ctxt, "go.link.addmoduledatainit", 0)
initarray_entry.Reachable = true
initarray_entry.Local = true
initarray_entry.Type = ld.SINITARR
ld.Addaddr(ld.Ctxt, initarray_entry, initfunc)
}
func elfreloc1(r *ld.Reloc, sectoff int64) int {
ld.Thearch.Vput(uint64(sectoff))
elfsym := r.Xsym.Elfsym
switch r.Type {
default:
return -1
case ld.R_ADDR:
if r.Siz == 4 {
ld.Thearch.Vput(ld.R_X86_64_32 | uint64(elfsym)<<32)
} else if r.Siz == 8 {
ld.Thearch.Vput(ld.R_X86_64_64 | uint64(elfsym)<<32)
} else {
return -1
}
case ld.R_TLS_LE:
if r.Siz == 4 {
ld.Thearch.Vput(ld.R_X86_64_TPOFF32 | uint64(elfsym)<<32)
} else {
return -1
}
case ld.R_TLS_IE:
if r.Siz == 4 {
ld.Thearch.Vput(ld.R_X86_64_GOTTPOFF | uint64(elfsym)<<32)
} else {
return -1
}
case ld.R_CALL:
if r.Siz == 4 {
if r.Xsym.Type == ld.SDYNIMPORT {
if ld.DynlinkingGo() {
ld.Thearch.Vput(ld.R_X86_64_PLT32 | uint64(elfsym)<<32)
} else {
ld.Thearch.Vput(ld.R_X86_64_GOTPCREL | uint64(elfsym)<<32)
}
} else {
ld.Thearch.Vput(ld.R_X86_64_PC32 | uint64(elfsym)<<32)
}
} else {
return -1
}
case ld.R_PCREL:
if r.Siz == 4 {
ld.Thearch.Vput(ld.R_X86_64_PC32 | uint64(elfsym)<<32)
} else {
return -1
}
case ld.R_GOTPCREL:
if r.Siz == 4 {
ld.Thearch.Vput(ld.R_X86_64_GOTPCREL | uint64(elfsym)<<32)
} else {
return -1
}
case ld.R_TLS:
if r.Siz == 4 {
if ld.Buildmode == ld.BuildmodeCShared {
ld.Thearch.Vput(ld.R_X86_64_GOTTPOFF | uint64(elfsym)<<32)
} else {
ld.Thearch.Vput(ld.R_X86_64_TPOFF32 | uint64(elfsym)<<32)
}
} else {
return -1
}
}
ld.Thearch.Vput(uint64(r.Xadd))
return 0
}
func archinit() {
// getgoextlinkenabled is based on GO_EXTLINK_ENABLED when
// Go was built; see ../../make.bash.
if ld.Linkmode == ld.LinkAuto && obj.Getgoextlinkenabled() == "0" {
ld.Linkmode = ld.LinkInternal
}
if ld.Buildmode == ld.BuildmodeCShared || ld.DynlinkingGo() {
ld.Linkmode = ld.LinkExternal
}
switch ld.HEADTYPE {
default:
if ld.Linkmode == ld.LinkAuto {
ld.Linkmode = ld.LinkInternal
}
if ld.Linkmode == ld.LinkExternal && obj.Getgoextlinkenabled() != "1" {
log.Fatalf("cannot use -linkmode=external with -H %s", ld.Headstr(int(ld.HEADTYPE)))
}
case ld.Hdarwin,
ld.Hdragonfly,
ld.Hfreebsd,
ld.Hlinux,
ld.Hnacl,
ld.Hnetbsd,
ld.Hopenbsd,
ld.Hsolaris,
ld.Hwindows:
break
}
switch ld.HEADTYPE {
default:
ld.Diag("unknown -H option")
ld.Errorexit()
fallthrough
case ld.Hplan9: /* plan 9 */
ld.HEADR = 32 + 8
if ld.INITTEXT == -1 {
ld.INITTEXT = 0x200000 + int64(ld.HEADR)
}
if ld.INITDAT == -1 {
ld.INITDAT = 0
}
if ld.INITRND == -1 {
ld.INITRND = 0x200000
}
case ld.Helf: /* elf32 executable */
ld.HEADR = int32(ld.Rnd(52+3*32, 16))
if ld.INITTEXT == -1 {
ld.INITTEXT = 0x80110000
}
if ld.INITDAT == -1 {
ld.INITDAT = 0
}
if ld.INITRND == -1 {
ld.INITRND = 4096
}
case ld.Hdarwin: /* apple MACH */
ld.Machoinit()
ld.HEADR = ld.INITIAL_MACHO_HEADR
if ld.INITRND == -1 {
ld.INITRND = 4096
}
if ld.INITTEXT == -1 {
ld.INITTEXT = 4096 + int64(ld.HEADR)
}
if ld.INITDAT == -1 {
ld.INITDAT = 0
}
case ld.Hlinux, /* elf64 executable */
ld.Hfreebsd, /* freebsd */
ld.Hnetbsd, /* netbsd */
ld.Hopenbsd, /* openbsd */
ld.Hdragonfly, /* dragonfly */
ld.Hsolaris: /* solaris */
ld.Elfinit()
ld.HEADR = ld.ELFRESERVE
if ld.INITTEXT == -1 {
ld.INITTEXT = (1 << 22) + int64(ld.HEADR)
}
if ld.INITDAT == -1 {
ld.INITDAT = 0
}
if ld.INITRND == -1 {
ld.INITRND = 4096
}
case ld.Hnacl:
ld.Elfinit()
ld.Debug['w']++ // disable dwarf, which gets confused and is useless anyway
ld.HEADR = 0x10000
ld.Funcalign = 32
if ld.INITTEXT == -1 {
ld.INITTEXT = 0x20000
}
if ld.INITDAT == -1 {
ld.INITDAT = 0
}
if ld.INITRND == -1 {
ld.INITRND = 0x10000
}
case ld.Hwindows: /* PE executable */
ld.Peinit()
ld.HEADR = ld.PEFILEHEADR
if ld.INITTEXT == -1 {
ld.INITTEXT = ld.PEBASE + int64(ld.PESECTHEADR)
}
if ld.INITDAT == -1 {
ld.INITDAT = 0
}
if ld.INITRND == -1 {
ld.INITRND = ld.PESECTALIGN
}
}
if ld.INITDAT != 0 && ld.INITRND != 0 {
fmt.Printf("warning: -D0x%x is ignored because of -R0x%x\n", uint64(ld.INITDAT), uint32(ld.INITRND))
}
}