debug: define ELF relocation for loong64

Contributors to the loong64 port are:
  Weining Lu <luweining@loongson.cn>
  Lei Wang <wanglei@loongson.cn>
  Lingqin Gong <gonglingqin@loongson.cn>
  Xiaolin Zhao <zhaoxiaolin@loongson.cn>
  Meidan Li <limeidan@loongson.cn>
  Xiaojuan Zhai <zhaixiaojuan@loongson.cn>
  Qiyuan Pu <puqiyuan@loongson.cn>
  Guoqi Chen <chenguoqi@loongson.cn>

This port has been updated to Go 1.15.6:
  https://github.com/loongson/go

For #46229

Change-Id: I0c58305754c20d2a59328adbd82caa527de254ec
Reviewed-on: https://go-review.googlesource.com/c/go/+/396735
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Cherry Mui <cherryyz@google.com>

diff --git a/api/next/46229.txt b/api/next/46229.txt
new file mode 100644 (file)
index 0000000..ebaaefd
--- /dev/null
+++ b/api/next/46229.txt
@@ -0,0 +1,105 @@
+pkg debug/elf, const EM_LOONGARCH = 258 #46229
+pkg debug/elf, const EM_LOONGARCH Machine #46229
+pkg debug/elf, const R_LARCH_32 = 1 #46229
+pkg debug/elf, const R_LARCH_32 R_LARCH #46229
+pkg debug/elf, const R_LARCH_64 = 2 #46229
+pkg debug/elf, const R_LARCH_64 R_LARCH #46229
+pkg debug/elf, const R_LARCH_ADD16 = 48 #46229
+pkg debug/elf, const R_LARCH_ADD16 R_LARCH #46229
+pkg debug/elf, const R_LARCH_ADD24 = 49 #46229
+pkg debug/elf, const R_LARCH_ADD24 R_LARCH #46229
+pkg debug/elf, const R_LARCH_ADD32 = 50 #46229
+pkg debug/elf, const R_LARCH_ADD32 R_LARCH #46229
+pkg debug/elf, const R_LARCH_ADD64 = 51 #46229
+pkg debug/elf, const R_LARCH_ADD64 R_LARCH #46229
+pkg debug/elf, const R_LARCH_ADD8 = 47 #46229
+pkg debug/elf, const R_LARCH_ADD8 R_LARCH #46229
+pkg debug/elf, const R_LARCH_COPY = 4 #46229
+pkg debug/elf, const R_LARCH_COPY R_LARCH #46229
+pkg debug/elf, const R_LARCH_IRELATIVE = 12 #46229
+pkg debug/elf, const R_LARCH_IRELATIVE R_LARCH #46229
+pkg debug/elf, const R_LARCH_JUMP_SLOT = 5 #46229
+pkg debug/elf, const R_LARCH_JUMP_SLOT R_LARCH #46229
+pkg debug/elf, const R_LARCH_MARK_LA = 20 #46229
+pkg debug/elf, const R_LARCH_MARK_LA R_LARCH #46229
+pkg debug/elf, const R_LARCH_MARK_PCREL = 21 #46229
+pkg debug/elf, const R_LARCH_MARK_PCREL R_LARCH #46229
+pkg debug/elf, const R_LARCH_NONE = 0 #46229
+pkg debug/elf, const R_LARCH_NONE R_LARCH #46229
+pkg debug/elf, const R_LARCH_RELATIVE = 3 #46229
+pkg debug/elf, const R_LARCH_RELATIVE R_LARCH #46229
+pkg debug/elf, const R_LARCH_SOP_ADD = 35 #46229
+pkg debug/elf, const R_LARCH_SOP_ADD R_LARCH #46229
+pkg debug/elf, const R_LARCH_SOP_AND = 36 #46229
+pkg debug/elf, const R_LARCH_SOP_AND R_LARCH #46229
+pkg debug/elf, const R_LARCH_SOP_ASSERT = 30 #46229
+pkg debug/elf, const R_LARCH_SOP_ASSERT R_LARCH #46229
+pkg debug/elf, const R_LARCH_SOP_IF_ELSE = 37 #46229
+pkg debug/elf, const R_LARCH_SOP_IF_ELSE R_LARCH #46229
+pkg debug/elf, const R_LARCH_SOP_NOT = 31 #46229
+pkg debug/elf, const R_LARCH_SOP_NOT R_LARCH #46229
+pkg debug/elf, const R_LARCH_SOP_POP_32_S_0_10_10_16_S2 = 45 #46229
+pkg debug/elf, const R_LARCH_SOP_POP_32_S_0_10_10_16_S2 R_LARCH #46229
+pkg debug/elf, const R_LARCH_SOP_POP_32_S_0_5_10_16_S2 = 44 #46229
+pkg debug/elf, const R_LARCH_SOP_POP_32_S_0_5_10_16_S2 R_LARCH #46229
+pkg debug/elf, const R_LARCH_SOP_POP_32_S_10_12 = 40 #46229
+pkg debug/elf, const R_LARCH_SOP_POP_32_S_10_12 R_LARCH #46229
+pkg debug/elf, const R_LARCH_SOP_POP_32_S_10_16 = 41 #46229
+pkg debug/elf, const R_LARCH_SOP_POP_32_S_10_16 R_LARCH #46229
+pkg debug/elf, const R_LARCH_SOP_POP_32_S_10_16_S2 = 42 #46229
+pkg debug/elf, const R_LARCH_SOP_POP_32_S_10_16_S2 R_LARCH #46229
+pkg debug/elf, const R_LARCH_SOP_POP_32_S_10_5 = 38 #46229
+pkg debug/elf, const R_LARCH_SOP_POP_32_S_10_5 R_LARCH #46229
+pkg debug/elf, const R_LARCH_SOP_POP_32_S_5_20 = 43 #46229
+pkg debug/elf, const R_LARCH_SOP_POP_32_S_5_20 R_LARCH #46229
+pkg debug/elf, const R_LARCH_SOP_POP_32_U = 46 #46229
+pkg debug/elf, const R_LARCH_SOP_POP_32_U R_LARCH #46229
+pkg debug/elf, const R_LARCH_SOP_POP_32_U_10_12 = 39 #46229
+pkg debug/elf, const R_LARCH_SOP_POP_32_U_10_12 R_LARCH #46229
+pkg debug/elf, const R_LARCH_SOP_PUSH_ABSOLUTE = 23 #46229
+pkg debug/elf, const R_LARCH_SOP_PUSH_ABSOLUTE R_LARCH #46229
+pkg debug/elf, const R_LARCH_SOP_PUSH_DUP = 24 #46229
+pkg debug/elf, const R_LARCH_SOP_PUSH_DUP R_LARCH #46229
+pkg debug/elf, const R_LARCH_SOP_PUSH_GPREL = 25 #46229
+pkg debug/elf, const R_LARCH_SOP_PUSH_GPREL R_LARCH #46229
+pkg debug/elf, const R_LARCH_SOP_PUSH_PCREL = 22 #46229
+pkg debug/elf, const R_LARCH_SOP_PUSH_PCREL R_LARCH #46229
+pkg debug/elf, const R_LARCH_SOP_PUSH_PLT_PCREL = 29 #46229
+pkg debug/elf, const R_LARCH_SOP_PUSH_PLT_PCREL R_LARCH #46229
+pkg debug/elf, const R_LARCH_SOP_PUSH_TLS_GD = 28 #46229
+pkg debug/elf, const R_LARCH_SOP_PUSH_TLS_GD R_LARCH #46229
+pkg debug/elf, const R_LARCH_SOP_PUSH_TLS_GOT = 27 #46229
+pkg debug/elf, const R_LARCH_SOP_PUSH_TLS_GOT R_LARCH #46229
+pkg debug/elf, const R_LARCH_SOP_PUSH_TLS_TPREL = 26 #46229
+pkg debug/elf, const R_LARCH_SOP_PUSH_TLS_TPREL R_LARCH #46229
+pkg debug/elf, const R_LARCH_SOP_SL = 33 #46229
+pkg debug/elf, const R_LARCH_SOP_SL R_LARCH #46229
+pkg debug/elf, const R_LARCH_SOP_SR = 34 #46229
+pkg debug/elf, const R_LARCH_SOP_SR R_LARCH #46229
+pkg debug/elf, const R_LARCH_SOP_SUB = 32 #46229
+pkg debug/elf, const R_LARCH_SOP_SUB R_LARCH #46229
+pkg debug/elf, const R_LARCH_SUB16 = 53 #46229
+pkg debug/elf, const R_LARCH_SUB16 R_LARCH #46229
+pkg debug/elf, const R_LARCH_SUB24 = 54 #46229
+pkg debug/elf, const R_LARCH_SUB24 R_LARCH #46229
+pkg debug/elf, const R_LARCH_SUB32 = 55 #46229
+pkg debug/elf, const R_LARCH_SUB32 R_LARCH #46229
+pkg debug/elf, const R_LARCH_SUB64 = 56 #46229
+pkg debug/elf, const R_LARCH_SUB64 R_LARCH #46229
+pkg debug/elf, const R_LARCH_SUB8 = 52 #46229
+pkg debug/elf, const R_LARCH_SUB8 R_LARCH #46229
+pkg debug/elf, const R_LARCH_TLS_DTPMOD32 = 6 #46229
+pkg debug/elf, const R_LARCH_TLS_DTPMOD32 R_LARCH #46229
+pkg debug/elf, const R_LARCH_TLS_DTPMOD64 = 7 #46229
+pkg debug/elf, const R_LARCH_TLS_DTPMOD64 R_LARCH #46229
+pkg debug/elf, const R_LARCH_TLS_DTPREL32 = 8 #46229
+pkg debug/elf, const R_LARCH_TLS_DTPREL32 R_LARCH #46229
+pkg debug/elf, const R_LARCH_TLS_DTPREL64 = 9 #46229
+pkg debug/elf, const R_LARCH_TLS_DTPREL64 R_LARCH #46229
+pkg debug/elf, const R_LARCH_TLS_TPREL32 = 10 #46229
+pkg debug/elf, const R_LARCH_TLS_TPREL32 R_LARCH #46229
+pkg debug/elf, const R_LARCH_TLS_TPREL64 = 11 #46229
+pkg debug/elf, const R_LARCH_TLS_TPREL64 R_LARCH #46229
+pkg debug/elf, method (R_LARCH) GoString() string #46229
+pkg debug/elf, method (R_LARCH) String() string #46229
+pkg debug/elf, type R_LARCH int #46229

diff --git a/src/debug/elf/elf.go b/src/debug/elf/elf.go
index 4c51bc4de2a16a0c7b061b864711390196d3a377..5b2e6d9d3fda36624be6c3dd49125926220b76c5 100644 (file)
--- a/src/debug/elf/elf.go
+++ b/src/debug/elf/elf.go
@@ -384,6 +384,7 @@ const (
        EM_RISCV         Machine = 243 /* RISC-V */
        EM_LANAI         Machine = 244 /* Lanai 32-bit processor */
        EM_BPF           Machine = 247 /* Linux BPF – in-kernel virtual machine */
+       EM_LOONGARCH     Machine = 258 /* LoongArch */
 
        /* Non-standard or deprecated. */
        EM_486         Machine = 6      /* Intel i486. */
@@ -575,6 +576,7 @@ var machineStrings = []intName{
        {243, "EM_RISCV"},
        {244, "EM_LANAI"},
        {247, "EM_BPF"},
+       {258, "EM_LOONGARCH"},
 
        /* Non-standard or deprecated. */
        {6, "EM_486"},
@@ -2150,6 +2152,118 @@ var rmipsStrings = []intName{
 func (i R_MIPS) String() string   { return stringName(uint32(i), rmipsStrings, false) }
 func (i R_MIPS) GoString() string { return stringName(uint32(i), rmipsStrings, true) }
 
+// Relocation types for LARCH.
+type R_LARCH int
+
+const (
+       R_LARCH_NONE                       R_LARCH = 0
+       R_LARCH_32                         R_LARCH = 1
+       R_LARCH_64                         R_LARCH = 2
+       R_LARCH_RELATIVE                   R_LARCH = 3
+       R_LARCH_COPY                       R_LARCH = 4
+       R_LARCH_JUMP_SLOT                  R_LARCH = 5
+       R_LARCH_TLS_DTPMOD32               R_LARCH = 6
+       R_LARCH_TLS_DTPMOD64               R_LARCH = 7
+       R_LARCH_TLS_DTPREL32               R_LARCH = 8
+       R_LARCH_TLS_DTPREL64               R_LARCH = 9
+       R_LARCH_TLS_TPREL32                R_LARCH = 10
+       R_LARCH_TLS_TPREL64                R_LARCH = 11
+       R_LARCH_IRELATIVE                  R_LARCH = 12
+       R_LARCH_MARK_LA                    R_LARCH = 20
+       R_LARCH_MARK_PCREL                 R_LARCH = 21
+       R_LARCH_SOP_PUSH_PCREL             R_LARCH = 22
+       R_LARCH_SOP_PUSH_ABSOLUTE          R_LARCH = 23
+       R_LARCH_SOP_PUSH_DUP               R_LARCH = 24
+       R_LARCH_SOP_PUSH_GPREL             R_LARCH = 25
+       R_LARCH_SOP_PUSH_TLS_TPREL         R_LARCH = 26
+       R_LARCH_SOP_PUSH_TLS_GOT           R_LARCH = 27
+       R_LARCH_SOP_PUSH_TLS_GD            R_LARCH = 28
+       R_LARCH_SOP_PUSH_PLT_PCREL         R_LARCH = 29
+       R_LARCH_SOP_ASSERT                 R_LARCH = 30
+       R_LARCH_SOP_NOT                    R_LARCH = 31
+       R_LARCH_SOP_SUB                    R_LARCH = 32
+       R_LARCH_SOP_SL                     R_LARCH = 33
+       R_LARCH_SOP_SR                     R_LARCH = 34
+       R_LARCH_SOP_ADD                    R_LARCH = 35
+       R_LARCH_SOP_AND                    R_LARCH = 36
+       R_LARCH_SOP_IF_ELSE                R_LARCH = 37
+       R_LARCH_SOP_POP_32_S_10_5          R_LARCH = 38
+       R_LARCH_SOP_POP_32_U_10_12         R_LARCH = 39
+       R_LARCH_SOP_POP_32_S_10_12         R_LARCH = 40
+       R_LARCH_SOP_POP_32_S_10_16         R_LARCH = 41
+       R_LARCH_SOP_POP_32_S_10_16_S2      R_LARCH = 42
+       R_LARCH_SOP_POP_32_S_5_20          R_LARCH = 43
+       R_LARCH_SOP_POP_32_S_0_5_10_16_S2  R_LARCH = 44
+       R_LARCH_SOP_POP_32_S_0_10_10_16_S2 R_LARCH = 45
+       R_LARCH_SOP_POP_32_U               R_LARCH = 46
+       R_LARCH_ADD8                       R_LARCH = 47
+       R_LARCH_ADD16                      R_LARCH = 48
+       R_LARCH_ADD24                      R_LARCH = 49
+       R_LARCH_ADD32                      R_LARCH = 50
+       R_LARCH_ADD64                      R_LARCH = 51
+       R_LARCH_SUB8                       R_LARCH = 52
+       R_LARCH_SUB16                      R_LARCH = 53
+       R_LARCH_SUB24                      R_LARCH = 54
+       R_LARCH_SUB32                      R_LARCH = 55
+       R_LARCH_SUB64                      R_LARCH = 56
+)
+
+var rlarchStrings = []intName{
+       {0, "R_LARCH_NONE"},
+       {1, "R_LARCH_32"},
+       {2, "R_LARCH_64"},
+       {3, "R_LARCH_RELATIVE"},
+       {4, "R_LARCH_COPY"},
+       {5, "R_LARCH_JUMP_SLOT"},
+       {6, "R_LARCH_TLS_DTPMOD32"},
+       {7, "R_LARCH_TLS_DTPMOD64"},
+       {8, "R_LARCH_TLS_DTPREL32"},
+       {9, "R_LARCH_TLS_DTPREL64"},
+       {10, "R_LARCH_TLS_TPREL32"},
+       {11, "R_LARCH_TLS_TPREL64"},
+       {12, "R_LARCH_IRELATIVE"},
+       {20, "R_LARCH_MARK_LA"},
+       {21, "R_LARCH_MARK_PCREL"},
+       {22, "R_LARCH_SOP_PUSH_PCREL"},
+       {23, "R_LARCH_SOP_PUSH_ABSOLUTE"},
+       {24, "R_LARCH_SOP_PUSH_DUP"},
+       {25, "R_LARCH_SOP_PUSH_GPREL"},
+       {26, "R_LARCH_SOP_PUSH_TLS_TPREL"},
+       {27, "R_LARCH_SOP_PUSH_TLS_GOT"},
+       {28, "R_LARCH_SOP_PUSH_TLS_GD"},
+       {29, "R_LARCH_SOP_PUSH_PLT_PCREL"},
+       {30, "R_LARCH_SOP_ASSERT"},
+       {31, "R_LARCH_SOP_NOT"},
+       {32, "R_LARCH_SOP_SUB"},
+       {33, "R_LARCH_SOP_SL"},
+       {34, "R_LARCH_SOP_SR"},
+       {35, "R_LARCH_SOP_ADD"},
+       {36, "R_LARCH_SOP_AND"},
+       {37, "R_LARCH_SOP_IF_ELSE"},
+       {38, "R_LARCH_SOP_POP_32_S_10_5"},
+       {39, "R_LARCH_SOP_POP_32_U_10_12"},
+       {40, "R_LARCH_SOP_POP_32_S_10_12"},
+       {41, "R_LARCH_SOP_POP_32_S_10_16"},
+       {42, "R_LARCH_SOP_POP_32_S_10_16_S2"},
+       {43, "R_LARCH_SOP_POP_32_S_5_20"},
+       {44, "R_LARCH_SOP_POP_32_S_0_5_10_16_S2"},
+       {45, "R_LARCH_SOP_POP_32_S_0_10_10_16_S2"},
+       {46, "R_LARCH_SOP_POP_32_U"},
+       {47, "R_LARCH_ADD8"},
+       {48, "R_LARCH_ADD16"},
+       {49, "R_LARCH_ADD24"},
+       {50, "R_LARCH_ADD32"},
+       {51, "R_LARCH_ADD64"},
+       {52, "R_LARCH_SUB8"},
+       {53, "R_LARCH_SUB16"},
+       {54, "R_LARCH_SUB24"},
+       {55, "R_LARCH_SUB32"},
+       {56, "R_LARCH_SUB64"},
+}
+
+func (i R_LARCH) String() string   { return stringName(uint32(i), rlarchStrings, false) }
+func (i R_LARCH) GoString() string { return stringName(uint32(i), rlarchStrings, true) }
+
 // Relocation types for PowerPC.
 //
 // Values that are shared by both R_PPC and R_PPC64 are prefixed with

diff --git a/src/debug/elf/file.go b/src/debug/elf/file.go
index 5f339596a7b80285dcee1227eee77413597079ba..6bfcd2a3f8490a1749bde34dc87e2bc3c752272f 100644 (file)
--- a/src/debug/elf/file.go
+++ b/src/debug/elf/file.go
@@ -633,6 +633,8 @@ func (f *File) applyRelocations(dst []byte, rels []byte) error {
                return f.applyRelocationsMIPS(dst, rels)
        case f.Class == ELFCLASS64 && f.Machine == EM_MIPS:
                return f.applyRelocationsMIPS64(dst, rels)
+       case f.Class == ELFCLASS64 && f.Machine == EM_LOONGARCH:
+               return f.applyRelocationsLOONG64(dst, rels)
        case f.Class == ELFCLASS64 && f.Machine == EM_RISCV:
                return f.applyRelocationsRISCV64(dst, rels)
        case f.Class == ELFCLASS64 && f.Machine == EM_S390:
@@ -1006,6 +1008,54 @@ func (f *File) applyRelocationsMIPS64(dst []byte, rels []byte) error {
        return nil
 }
 
+func (f *File) applyRelocationsLOONG64(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)
+               var symNo uint64
+               var t R_LARCH
+               symNo = rela.Info >> 32
+               t = R_LARCH(rela.Info & 0xffff)
+
+               if symNo == 0 || symNo > uint64(len(symbols)) {
+                       continue
+               }
+               sym := &symbols[symNo-1]
+               if !canApplyRelocation(sym) {
+                       continue
+               }
+
+               switch t {
+               case R_LARCH_64:
+                       if rela.Off+8 >= uint64(len(dst)) || rela.Addend < 0 {
+                               continue
+                       }
+                       val64 := sym.Value + uint64(rela.Addend)
+                       f.ByteOrder.PutUint64(dst[rela.Off:rela.Off+8], val64)
+               case R_LARCH_32:
+                       if rela.Off+4 >= uint64(len(dst)) || rela.Addend < 0 {
+                               continue
+                       }
+                       val32 := uint32(sym.Value) + uint32(rela.Addend)
+                       f.ByteOrder.PutUint32(dst[rela.Off:rela.Off+4], val32)
+               }
+       }
+
+       return nil
+}
+
 func (f *File) applyRelocationsRISCV64(dst []byte, rels []byte) error {
        // 24 is the size of Rela64.
        if len(rels)%24 != 0 {