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debug/elf: add power64 support along with relocation test

Browse Source 
Backport of https://codereview.appspot.com/125910043 from the
dev.power64 branch of the master repository.

From-SVN: r216813
This commit is contained in:
Ian Lance Taylor 2014-10-28 22:57:35 +00:00
parent a56abdccae
commit 5d51c2d70c
4 changed files with 233 additions and 1 deletions
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178
libgo/go/debug/elf/elf.go
View File

@ -1162,6 +1162,184 @@ var rppcStrings = []intName{
func (i R_PPC) String() string { return stringName(uint32(i), rppcStrings, false) }
func (i R_PPC) GoString() string { return stringName(uint32(i), rppcStrings, true) }
// Relocation types for PowerPC 64.
type R_PPC64 int
const (
R_PPC64_NONE R_PPC64 = 0
R_PPC64_ADDR32 R_PPC64 = 1
R_PPC64_ADDR24 R_PPC64 = 2
R_PPC64_ADDR16 R_PPC64 = 3
R_PPC64_ADDR16_LO R_PPC64 = 4
R_PPC64_ADDR16_HI R_PPC64 = 5
R_PPC64_ADDR16_HA R_PPC64 = 6
R_PPC64_ADDR14 R_PPC64 = 7
R_PPC64_ADDR14_BRTAKEN R_PPC64 = 8
R_PPC64_ADDR14_BRNTAKEN R_PPC64 = 9
R_PPC64_REL24 R_PPC64 = 10
R_PPC64_REL14 R_PPC64 = 11
R_PPC64_REL14_BRTAKEN R_PPC64 = 12
R_PPC64_REL14_BRNTAKEN R_PPC64 = 13
R_PPC64_GOT16 R_PPC64 = 14
R_PPC64_GOT16_LO R_PPC64 = 15
R_PPC64_GOT16_HI R_PPC64 = 16
R_PPC64_GOT16_HA R_PPC64 = 17
R_PPC64_JMP_SLOT R_PPC64 = 21
R_PPC64_REL32 R_PPC64 = 26
R_PPC64_ADDR64 R_PPC64 = 38
R_PPC64_ADDR16_HIGHER R_PPC64 = 39
R_PPC64_ADDR16_HIGHERA R_PPC64 = 40
R_PPC64_ADDR16_HIGHEST R_PPC64 = 41
R_PPC64_ADDR16_HIGHESTA R_PPC64 = 42
R_PPC64_REL64 R_PPC64 = 44
R_PPC64_TOC16 R_PPC64 = 47
R_PPC64_TOC16_LO R_PPC64 = 48
R_PPC64_TOC16_HI R_PPC64 = 49
R_PPC64_TOC16_HA R_PPC64 = 50
R_PPC64_TOC R_PPC64 = 51
R_PPC64_ADDR16_DS R_PPC64 = 56
R_PPC64_ADDR16_LO_DS R_PPC64 = 57
R_PPC64_GOT16_DS R_PPC64 = 58
R_PPC64_GOT16_LO_DS R_PPC64 = 59
R_PPC64_TOC16_DS R_PPC64 = 63
R_PPC64_TOC16_LO_DS R_PPC64 = 64
R_PPC64_TLS R_PPC64 = 67
R_PPC64_DTPMOD64 R_PPC64 = 68
R_PPC64_TPREL16 R_PPC64 = 69
R_PPC64_TPREL16_LO R_PPC64 = 70
R_PPC64_TPREL16_HI R_PPC64 = 71
R_PPC64_TPREL16_HA R_PPC64 = 72
R_PPC64_TPREL64 R_PPC64 = 73
R_PPC64_DTPREL16 R_PPC64 = 74
R_PPC64_DTPREL16_LO R_PPC64 = 75
R_PPC64_DTPREL16_HI R_PPC64 = 76
R_PPC64_DTPREL16_HA R_PPC64 = 77
R_PPC64_DTPREL64 R_PPC64 = 78
R_PPC64_GOT_TLSGD16 R_PPC64 = 79
R_PPC64_GOT_TLSGD16_LO R_PPC64 = 80
R_PPC64_GOT_TLSGD16_HI R_PPC64 = 81
R_PPC64_GOT_TLSGD16_HA R_PPC64 = 82
R_PPC64_GOT_TLSLD16 R_PPC64 = 83
R_PPC64_GOT_TLSLD16_LO R_PPC64 = 84
R_PPC64_GOT_TLSLD16_HI R_PPC64 = 85
R_PPC64_GOT_TLSLD16_HA R_PPC64 = 86
R_PPC64_GOT_TPREL16_DS R_PPC64 = 87
R_PPC64_GOT_TPREL16_LO_DS R_PPC64 = 88
R_PPC64_GOT_TPREL16_HI R_PPC64 = 89
R_PPC64_GOT_TPREL16_HA R_PPC64 = 90
R_PPC64_GOT_DTPREL16_DS R_PPC64 = 91
R_PPC64_GOT_DTPREL16_LO_DS R_PPC64 = 92
R_PPC64_GOT_DTPREL16_HI R_PPC64 = 93
R_PPC64_GOT_DTPREL16_HA R_PPC64 = 94
R_PPC64_TPREL16_DS R_PPC64 = 95
R_PPC64_TPREL16_LO_DS R_PPC64 = 96
R_PPC64_TPREL16_HIGHER R_PPC64 = 97
R_PPC64_TPREL16_HIGHERA R_PPC64 = 98
R_PPC64_TPREL16_HIGHEST R_PPC64 = 99
R_PPC64_TPREL16_HIGHESTA R_PPC64 = 100
R_PPC64_DTPREL16_DS R_PPC64 = 101
R_PPC64_DTPREL16_LO_DS R_PPC64 = 102
R_PPC64_DTPREL16_HIGHER R_PPC64 = 103
R_PPC64_DTPREL16_HIGHERA R_PPC64 = 104
R_PPC64_DTPREL16_HIGHEST R_PPC64 = 105
R_PPC64_DTPREL16_HIGHESTA R_PPC64 = 106
R_PPC64_TLSGD R_PPC64 = 107
R_PPC64_TLSLD R_PPC64 = 108
R_PPC64_REL16 R_PPC64 = 249
R_PPC64_REL16_LO R_PPC64 = 250
R_PPC64_REL16_HI R_PPC64 = 251
R_PPC64_REL16_HA R_PPC64 = 252
)
var rppc64Strings = []intName{
{0, "R_PPC64_NONE"},
{1, "R_PPC64_ADDR32"},
{2, "R_PPC64_ADDR24"},
{3, "R_PPC64_ADDR16"},
{4, "R_PPC64_ADDR16_LO"},
{5, "R_PPC64_ADDR16_HI"},
{6, "R_PPC64_ADDR16_HA"},
{7, "R_PPC64_ADDR14"},
{8, "R_PPC64_ADDR14_BRTAKEN"},
{9, "R_PPC64_ADDR14_BRNTAKEN"},
{10, "R_PPC64_REL24"},
{11, "R_PPC64_REL14"},
{12, "R_PPC64_REL14_BRTAKEN"},
{13, "R_PPC64_REL14_BRNTAKEN"},
{14, "R_PPC64_GOT16"},
{15, "R_PPC64_GOT16_LO"},
{16, "R_PPC64_GOT16_HI"},
{17, "R_PPC64_GOT16_HA"},
{21, "R_PPC64_JMP_SLOT"},
{26, "R_PPC64_REL32"},
{38, "R_PPC64_ADDR64"},
{39, "R_PPC64_ADDR16_HIGHER"},
{40, "R_PPC64_ADDR16_HIGHERA"},
{41, "R_PPC64_ADDR16_HIGHEST"},
{42, "R_PPC64_ADDR16_HIGHESTA"},
{44, "R_PPC64_REL64"},
{47, "R_PPC64_TOC16"},
{48, "R_PPC64_TOC16_LO"},
{49, "R_PPC64_TOC16_HI"},
{50, "R_PPC64_TOC16_HA"},
{51, "R_PPC64_TOC"},
{56, "R_PPC64_ADDR16_DS"},
{57, "R_PPC64_ADDR16_LO_DS"},
{58, "R_PPC64_GOT16_DS"},
{59, "R_PPC64_GOT16_LO_DS"},
{63, "R_PPC64_TOC16_DS"},
{64, "R_PPC64_TOC16_LO_DS"},
{67, "R_PPC64_TLS"},
{68, "R_PPC64_DTPMOD64"},
{69, "R_PPC64_TPREL16"},
{70, "R_PPC64_TPREL16_LO"},
{71, "R_PPC64_TPREL16_HI"},
{72, "R_PPC64_TPREL16_HA"},
{73, "R_PPC64_TPREL64"},
{74, "R_PPC64_DTPREL16"},
{75, "R_PPC64_DTPREL16_LO"},
{76, "R_PPC64_DTPREL16_HI"},
{77, "R_PPC64_DTPREL16_HA"},
{78, "R_PPC64_DTPREL64"},
{79, "R_PPC64_GOT_TLSGD16"},
{80, "R_PPC64_GOT_TLSGD16_LO"},
{81, "R_PPC64_GOT_TLSGD16_HI"},
{82, "R_PPC64_GOT_TLSGD16_HA"},
{83, "R_PPC64_GOT_TLSLD16"},
{84, "R_PPC64_GOT_TLSLD16_LO"},
{85, "R_PPC64_GOT_TLSLD16_HI"},
{86, "R_PPC64_GOT_TLSLD16_HA"},
{87, "R_PPC64_GOT_TPREL16_DS"},
{88, "R_PPC64_GOT_TPREL16_LO_DS"},
{89, "R_PPC64_GOT_TPREL16_HI"},
{90, "R_PPC64_GOT_TPREL16_HA"},
{91, "R_PPC64_GOT_DTPREL16_DS"},
{92, "R_PPC64_GOT_DTPREL16_LO_DS"},
{93, "R_PPC64_GOT_DTPREL16_HI"},
{94, "R_PPC64_GOT_DTPREL16_HA"},
{95, "R_PPC64_TPREL16_DS"},
{96, "R_PPC64_TPREL16_LO_DS"},
{97, "R_PPC64_TPREL16_HIGHER"},
{98, "R_PPC64_TPREL16_HIGHERA"},
{99, "R_PPC64_TPREL16_HIGHEST"},
{100, "R_PPC64_TPREL16_HIGHESTA"},
{101, "R_PPC64_DTPREL16_DS"},
{102, "R_PPC64_DTPREL16_LO_DS"},
{103, "R_PPC64_DTPREL16_HIGHER"},
{104, "R_PPC64_DTPREL16_HIGHERA"},
{105, "R_PPC64_DTPREL16_HIGHEST"},
{106, "R_PPC64_DTPREL16_HIGHESTA"},
{107, "R_PPC64_TLSGD"},
{108, "R_PPC64_TLSLD"},
{249, "R_PPC64_REL16"},
{250, "R_PPC64_REL16_LO"},
{251, "R_PPC64_REL16_HI"},
{252, "R_PPC64_REL16_HA"},
}
func (i R_PPC64) String() string { return stringName(uint32(i), rppc64Strings, false) }
func (i R_PPC64) GoString() string { return stringName(uint32(i), rppc64Strings, true) }
// Relocation types for SPARC.
type R_SPARC int

50
libgo/go/debug/elf/file.go
View File

@ -525,6 +525,9 @@ func (f *File) applyRelocations(dst []byte, rels []byte) error {
if f.Class == ELFCLASS32 && f.Machine == EM_386 {
return f.applyRelocations386(dst, rels)
}
if f.Class == ELFCLASS64 && f.Machine == EM_PPC64 {
return f.applyRelocationsPPC64(dst, rels)
}
return errors.New("not implemented")
}
@ -611,6 +614,51 @@ func (f *File) applyRelocations386(dst []byte, rels []byte) error {
return nil
}
func (f *File) applyRelocationsPPC64(dst []byte, rels []byte) error {
// 24 is the size of Rela64.
if len(rels)%24 != 0 {
return errors.New("length of relocation section is not a multiple of 24")
}
symbols, _, err := f.getSymbols(SHT_SYMTAB)
if err != nil {
return err
}
b := bytes.NewReader(rels)
var rela Rela64
for b.Len() > 0 {
binary.Read(b, f.ByteOrder, &rela)
symNo := rela.Info >> 32
t := R_PPC64(rela.Info & 0xffff)
if symNo == 0 || symNo > uint64(len(symbols)) {
continue
}
sym := &symbols[symNo-1]
if SymType(sym.Info&0xf) != STT_SECTION {
// We don't handle non-section relocations for now.
continue
}
switch t {
case R_PPC64_ADDR64:
if rela.Off+8 >= uint64(len(dst)) || rela.Addend < 0 {
continue
}
f.ByteOrder.PutUint64(dst[rela.Off:rela.Off+8], uint64(rela.Addend))
case R_PPC64_ADDR32:
if rela.Off+4 >= uint64(len(dst)) || rela.Addend < 0 {
continue
}
f.ByteOrder.PutUint32(dst[rela.Off:rela.Off+4], uint32(rela.Addend))
}
}
return nil
}
func (f *File) DWARF() (*dwarf.Data, error) {
// There are many other DWARF sections, but these
// are the required ones, and the debug/dwarf package
@ -633,7 +681,7 @@ func (f *File) DWARF() (*dwarf.Data, error) {
// If there's a relocation table for .debug_info, we have to process it
// now otherwise the data in .debug_info is invalid for x86-64 objects.
rela := f.Section(".rela.debug_info")
if rela != nil && rela.Type == SHT_RELA && f.Machine == EM_X86_64 {
if rela != nil && rela.Type == SHT_RELA && (f.Machine == EM_X86_64 || f.Machine == EM_PPC64) {
data, err := rela.Data()
if err != nil {
return nil, err

6
libgo/go/debug/elf/file_test.go
View File

@ -260,6 +260,12 @@ var relocationTests = []relocationTest{
{0, &dwarf.Entry{Offset: 0xb, Tag: dwarf.TagCompileUnit, Children: true, Field: []dwarf.Field{{Attr: dwarf.AttrProducer, Val: "GNU C 4.2.4 (Ubuntu 4.2.4-1ubuntu4)"}, {Attr: dwarf.AttrLanguage, Val: int64(1)}, {Attr: dwarf.AttrName, Val: "go-relocation-test-gcc424.c"}, {Attr: dwarf.AttrCompDir, Val: "/tmp"}, {Attr: dwarf.AttrLowpc, Val: uint64(0x0)}, {Attr: dwarf.AttrHighpc, Val: uint64(0x6)}, {Attr: dwarf.AttrStmtList, Val: int64(0)}}}},
},
},
{
"testdata/go-relocation-test-gcc482-ppc64le.obj",
[]relocationTestEntry{
{0, &dwarf.Entry{Offset: 0xb, Tag: dwarf.TagCompileUnit, Children: true, Field: []dwarf.Field{dwarf.Field{Attr: dwarf.AttrProducer, Val: "GNU C 4.8.2 -Asystem=linux -Asystem=unix -Asystem=posix -msecure-plt -mtune=power8 -mcpu=power7 -gdwarf-2 -fstack-protector"}, dwarf.Field{Attr: dwarf.AttrLanguage, Val: int64(1)}, dwarf.Field{Attr: dwarf.AttrName, Val: "go-relocation-test-gcc482-ppc64le.c"}, dwarf.Field{Attr: dwarf.AttrCompDir, Val: "/tmp"}, dwarf.Field{Attr: dwarf.AttrLowpc, Val: uint64(0x0)}, dwarf.Field{Attr: dwarf.AttrHighpc, Val: uint64(0x24)}, dwarf.Field{Attr: dwarf.AttrStmtList, Val: int64(0)}}}},
},
},
{
"testdata/go-relocation-test-clang-x86.obj",
[]relocationTestEntry{

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libgo/go/debug/elf/testdata/go-relocation-test-gcc482-ppc64le.obj vendored Normal file
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