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cmd/link/internal/ld: add s390x support
Introduces the new relocation variant RV_390_DBL which indicates that the relocation value should be shifted right by 1 (to make it 2-byte aligned). Change-Id: I03fa96b4759ee19330c5298c3720746622fb1a03 Reviewed-on: https://go-review.googlesource.com/20878 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Michael Munday
Brad Fitzpatrick
parent
29267c2131
commit
163ff700b8
8 changed files with 170 additions and 28 deletions
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@ -647,6 +647,68 @@ const (
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R_SPARC_UA64 = 54
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R_SPARC_UA16 = 55
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R_390_NONE = 0
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R_390_8 = 1
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R_390_12 = 2
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R_390_16 = 3
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R_390_32 = 4
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R_390_PC32 = 5
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R_390_GOT12 = 6
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R_390_GOT32 = 7
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R_390_PLT32 = 8
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R_390_COPY = 9
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R_390_GLOB_DAT = 10
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R_390_JMP_SLOT = 11
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R_390_RELATIVE = 12
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R_390_GOTOFF = 13
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R_390_GOTPC = 14
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R_390_GOT16 = 15
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R_390_PC16 = 16
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R_390_PC16DBL = 17
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R_390_PLT16DBL = 18
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R_390_PC32DBL = 19
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R_390_PLT32DBL = 20
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R_390_GOTPCDBL = 21
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R_390_64 = 22
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R_390_PC64 = 23
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R_390_GOT64 = 24
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R_390_PLT64 = 25
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R_390_GOTENT = 26
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R_390_GOTOFF16 = 27
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R_390_GOTOFF64 = 28
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R_390_GOTPLT12 = 29
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R_390_GOTPLT16 = 30
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R_390_GOTPLT32 = 31
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R_390_GOTPLT64 = 32
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R_390_GOTPLTENT = 33
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R_390_GOTPLTOFF16 = 34
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R_390_GOTPLTOFF32 = 35
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R_390_GOTPLTOFF64 = 36
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R_390_TLS_LOAD = 37
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R_390_TLS_GDCALL = 38
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R_390_TLS_LDCALL = 39
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R_390_TLS_GD32 = 40
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R_390_TLS_GD64 = 41
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R_390_TLS_GOTIE12 = 42
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R_390_TLS_GOTIE32 = 43
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R_390_TLS_GOTIE64 = 44
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R_390_TLS_LDM32 = 45
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R_390_TLS_LDM64 = 46
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R_390_TLS_IE32 = 47
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R_390_TLS_IE64 = 48
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R_390_TLS_IEENT = 49
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R_390_TLS_LE32 = 50
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R_390_TLS_LE64 = 51
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R_390_TLS_LDO32 = 52
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R_390_TLS_LDO64 = 53
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R_390_TLS_DTPMOD = 54
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R_390_TLS_DTPOFF = 55
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R_390_TLS_TPOFF = 56
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R_390_20 = 57
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R_390_GOT20 = 58
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R_390_GOTPLT20 = 59
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R_390_TLS_GOTIE20 = 60
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ARM_MAGIC_TRAMP_NUMBER = 0x5c000003
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)
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@ -804,7 +866,7 @@ func Elfinit() {
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switch Thearch.Thechar {
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// 64-bit architectures
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case '9':
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case '9', 'z':
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if Ctxt.Arch.ByteOrder == binary.BigEndian {
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ehdr.flags = 1 /* Version 1 ABI */
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} else {
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@ -1360,13 +1422,25 @@ func elfdynhash() {
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buckets[b] = uint32(sy.Dynid)
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}
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Adduint32(Ctxt, s, uint32(nbucket))
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Adduint32(Ctxt, s, uint32(nsym))
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for i := 0; i < nbucket; i++ {
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Adduint32(Ctxt, s, buckets[i])
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}
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for i := 0; i < nsym; i++ {
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Adduint32(Ctxt, s, chain[i])
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// s390x (ELF64) hash table entries are 8 bytes
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if Thearch.Thechar == 'z' {
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Adduint64(Ctxt, s, uint64(nbucket))
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Adduint64(Ctxt, s, uint64(nsym))
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for i := 0; i < nbucket; i++ {
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Adduint64(Ctxt, s, uint64(buckets[i]))
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}
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for i := 0; i < nsym; i++ {
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Adduint64(Ctxt, s, uint64(chain[i]))
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}
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} else {
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Adduint32(Ctxt, s, uint32(nbucket))
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Adduint32(Ctxt, s, uint32(nsym))
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for i := 0; i < nbucket; i++ {
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Adduint32(Ctxt, s, buckets[i])
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}
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for i := 0; i < nsym; i++ {
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Adduint32(Ctxt, s, chain[i])
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}
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}
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// version symbols
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@ -1434,7 +1508,7 @@ func elfdynhash() {
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}
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switch Thearch.Thechar {
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case '0', '6', '7', '9':
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case '0', '6', '7', '9', 'z':
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sy := Linklookup(Ctxt, ".rela.plt", 0)
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if sy.Size > 0 {
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Elfwritedynent(s, DT_PLTREL, DT_RELA)
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@ -1574,7 +1648,7 @@ func elfshreloc(sect *Section) *ElfShdr {
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var prefix string
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var typ int
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switch Thearch.Thechar {
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case '0', '6', '7', '9':
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case '0', '6', '7', '9', 'z':
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prefix = ".rela"
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typ = SHT_RELA
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default:
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@ -1748,7 +1822,7 @@ func doelf() {
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Debug['d'] = 1
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switch Thearch.Thechar {
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case '0', '6', '7', '9':
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case '0', '6', '7', '9', 'z':
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Addstring(shstrtab, ".rela.text")
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Addstring(shstrtab, ".rela.rodata")
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Addstring(shstrtab, ".rela"+relro_prefix+".typelink")
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@ -1796,7 +1870,7 @@ func doelf() {
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if hasinitarr {
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Addstring(shstrtab, ".init_array")
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switch Thearch.Thechar {
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case '0', '6', '7', '9':
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case '0', '6', '7', '9', 'z':
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Addstring(shstrtab, ".rela.init_array")
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default:
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Addstring(shstrtab, ".rel.init_array")
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@ -1823,7 +1897,7 @@ func doelf() {
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Addstring(shstrtab, ".dynsym")
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Addstring(shstrtab, ".dynstr")
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switch Thearch.Thechar {
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case '0', '6', '7', '9':
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case '0', '6', '7', '9', 'z':
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Addstring(shstrtab, ".rela")
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Addstring(shstrtab, ".rela.plt")
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default:
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@ -1841,7 +1915,7 @@ func doelf() {
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s.Type = obj.SELFROSECT
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s.Attr |= AttrReachable
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switch Thearch.Thechar {
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case '0', '6', '7', '9':
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case '0', '6', '7', '9', 'z':
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s.Size += ELF64SYMSIZE
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default:
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s.Size += ELF32SYMSIZE
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@ -1859,7 +1933,7 @@ func doelf() {
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/* relocation table */
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switch Thearch.Thechar {
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case '0', '6', '7', '9':
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case '0', '6', '7', '9', 'z':
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s = Linklookup(Ctxt, ".rela", 0)
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default:
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s = Linklookup(Ctxt, ".rel", 0)
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@ -1904,7 +1978,7 @@ func doelf() {
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Thearch.Elfsetupplt()
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switch Thearch.Thechar {
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case '0', '6', '7', '9':
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case '0', '6', '7', '9', 'z':
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s = Linklookup(Ctxt, ".rela.plt", 0)
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default:
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s = Linklookup(Ctxt, ".rel.plt", 0)
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@ -1933,7 +2007,7 @@ func doelf() {
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elfwritedynentsym(s, DT_SYMTAB, Linklookup(Ctxt, ".dynsym", 0))
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switch Thearch.Thechar {
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case '0', '6', '7', '9':
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case '0', '6', '7', '9', 'z':
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Elfwritedynent(s, DT_SYMENT, ELF64SYMSIZE)
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default:
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Elfwritedynent(s, DT_SYMENT, ELF32SYMSIZE)
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@ -1941,7 +2015,7 @@ func doelf() {
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elfwritedynentsym(s, DT_STRTAB, Linklookup(Ctxt, ".dynstr", 0))
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elfwritedynentsymsize(s, DT_STRSZ, Linklookup(Ctxt, ".dynstr", 0))
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switch Thearch.Thechar {
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case '0', '6', '7', '9':
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case '0', '6', '7', '9', 'z':
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elfwritedynentsym(s, DT_RELA, Linklookup(Ctxt, ".rela", 0))
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elfwritedynentsymsize(s, DT_RELASZ, Linklookup(Ctxt, ".rela", 0))
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Elfwritedynent(s, DT_RELAENT, ELF64RELASIZE)
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@ -1957,6 +2031,8 @@ func doelf() {
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if Thearch.Thechar == '9' {
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elfwritedynentsym(s, DT_PLTGOT, Linklookup(Ctxt, ".plt", 0))
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} else if Thearch.Thechar == 'z' {
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elfwritedynentsym(s, DT_PLTGOT, Linklookup(Ctxt, ".got", 0))
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} else {
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elfwritedynentsym(s, DT_PLTGOT, Linklookup(Ctxt, ".got.plt", 0))
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}
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@ -2052,6 +2128,8 @@ func Asmbelf(symo int64) {
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eh.machine = EM_386
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case '9':
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eh.machine = EM_PPC64
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case 'z':
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eh.machine = EM_S390
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}
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elfreserve := int64(ELFRESERVE)
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@ -2237,7 +2315,7 @@ func Asmbelf(symo int64) {
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}
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switch eh.machine {
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case EM_X86_64, EM_PPC64, EM_AARCH64:
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case EM_X86_64, EM_PPC64, EM_AARCH64, EM_S390:
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sh := elfshname(".rela.plt")
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sh.type_ = SHT_RELA
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sh.flags = SHF_ALLOC
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@ -2286,6 +2364,8 @@ func Asmbelf(symo int64) {
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sh.flags = SHF_ALLOC + SHF_EXECINSTR
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if eh.machine == EM_X86_64 {
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sh.entsize = 16
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} else if eh.machine == EM_S390 {
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sh.entsize = 32
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} else if eh.machine == EM_PPC64 {
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// On ppc64, this is just a table of addresses
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// filled by the dynamic linker
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