Beispiel #1
0
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 := s.Extname
		ld.Adduint32(ctxt, d, uint32(ld.Addstring(ld.Linklookup(ctxt, ".dynstr", 0), name)))

		/* type */
		t := ld.STB_GLOBAL << 4

		if s.Cgoexport != 0 && s.Type&ld.SMASK == ld.STEXT {
			t |= ld.STT_FUNC
		} else {
			t |= ld.STT_OBJECT
		}
		ld.Adduint8(ctxt, d, uint8(t))

		/* reserved */
		ld.Adduint8(ctxt, d, 0)

		/* section where symbol is defined */
		if s.Type == ld.SDYNIMPORT {
			ld.Adduint16(ctxt, d, ld.SHN_UNDEF)
		} else {
			ld.Adduint16(ctxt, d, 1)
		}

		/* value */
		if s.Type == ld.SDYNIMPORT {
			ld.Adduint64(ctxt, d, 0)
		} else {
			ld.Addaddr(ctxt, d, s)
		}

		/* size of object */
		ld.Adduint64(ctxt, d, uint64(s.Size))

		if s.Cgoexport&ld.CgoExportDynamic == 0 && s.Dynimplib != "" && needlib(s.Dynimplib) != 0 {
			ld.Elfwritedynent(ld.Linklookup(ctxt, ".dynamic", 0), ld.DT_NEEDED, uint64(ld.Addstring(ld.Linklookup(ctxt, ".dynstr", 0), s.Dynimplib)))
		}
	} else if ld.HEADTYPE == ld.Hdarwin {
		ld.Diag("adddynsym: missed symbol %s (%s)", s.Name, s.Extname)
	} else if ld.HEADTYPE == ld.Hwindows {
	} else // already taken care of
	{
		ld.Diag("adddynsym: unsupported binary format")
	}
}
Beispiel #2
0
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 != 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 if ld.HEADTYPE == ld.Hdarwin {
		ld.Diag("adddynsym: missed symbol %s (%s)", s.Name, s.Extname)
	} else if ld.HEADTYPE == ld.Hwindows {
	} else // already taken care of
	{
		ld.Diag("adddynsym: unsupported binary format")
	}
}
Beispiel #3
0
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")
	}
}
Beispiel #4
0
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 := s.Extname
		ld.Adduint32(ctxt, d, uint32(ld.Addstring(ld.Linklookup(ctxt, ".dynstr", 0), name)))

		/* type */
		t := ld.STB_GLOBAL << 4

		if s.Cgoexport != 0 && s.Type&ld.SMASK == ld.STEXT {
			t |= ld.STT_FUNC
		} else {
			t |= ld.STT_OBJECT
		}
		ld.Adduint8(ctxt, d, uint8(t))

		/* reserved */
		ld.Adduint8(ctxt, d, 0)

		/* section where symbol is defined */
		if s.Type == ld.SDYNIMPORT {
			ld.Adduint16(ctxt, d, ld.SHN_UNDEF)
		} else {
			ld.Adduint16(ctxt, d, 1)
		}

		/* value */
		if s.Type == ld.SDYNIMPORT {
			ld.Adduint64(ctxt, d, 0)
		} else {
			ld.Addaddr(ctxt, d, s)
		}

		/* size of object */
		ld.Adduint64(ctxt, d, uint64(s.Size))
	} else {
		ld.Diag("adddynsym: unsupported binary format")
	}
}
Beispiel #5
0
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)
}