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https://github.com/golang/go
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cmd/internal/objabi,cmd/link: initial linker support for riscv64
Provide initial linker support for riscv64. Based on riscv-go port. Updates #27532 Change-Id: I8a881ce41cd49efef0358bad9171d4d18aaf7ab2 Reviewed-on: https://go-review.googlesource.com/c/go/+/204624 Run-TryBot: Joel Sing <joel@sing.id.au> Reviewed-by: Cherry Zhang <cherryyz@google.com>
This commit is contained in:
Joel Sing
parent
43ec1b12f5
commit
bf5f64107a
1
src/cmd/dist/buildtool.go
vendored
1
src/cmd/dist/buildtool.go
vendored
@ -82,6 +82,7 @@ var bootstrapDirs = []string{
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"cmd/link/internal/mips64",
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"cmd/link/internal/objfile",
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"cmd/link/internal/ppc64",
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"cmd/link/internal/riscv64",
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"cmd/link/internal/s390x",
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"cmd/link/internal/sym",
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"cmd/link/internal/x86",
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@ -64,6 +64,8 @@ const (
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// R_CALLMIPS (only used on mips64) resolves to non-PC-relative target address
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// of a CALL (JAL) instruction, by encoding the address into the instruction.
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R_CALLMIPS
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// R_CALLRISCV marks RISC-V CALLs for stack checking.
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R_CALLRISCV
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R_CONST
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R_PCREL
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// R_TLS_LE, used on 386, amd64, and ARM, resolves to the offset of the
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@ -200,6 +202,16 @@ const (
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// relocated symbol rather than the symbol's address.
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R_ADDRPOWER_TOCREL_DS
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// RISC-V.
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// R_RISCV_PCREL_ITYPE resolves a 32-bit PC-relative address using an
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// AUIPC + I-type instruction pair.
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R_RISCV_PCREL_ITYPE
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// R_RISCV_PCREL_STYPE resolves a 32-bit PC-relative address using an
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// AUIPC + S-type instruction pair.
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R_RISCV_PCREL_STYPE
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// R_PCRELDBL relocates s390x 2-byte aligned PC-relative addresses.
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// TODO(mundaym): remove once variants can be serialized - see issue 14218.
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R_PCRELDBL
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@ -210,6 +222,7 @@ const (
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// R_ADDRMIPSTLS (only used on mips64) resolves to the low 16 bits of a TLS
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// address (offset from thread pointer), by encoding it into the instruction.
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R_ADDRMIPSTLS
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// R_ADDRCUOFF resolves to a pointer-sized offset from the start of the
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// symbol's DWARF compile unit.
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R_ADDRCUOFF
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@ -230,7 +243,7 @@ const (
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// the target address in register or memory.
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func (r RelocType) IsDirectCall() bool {
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switch r {
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case R_CALL, R_CALLARM, R_CALLARM64, R_CALLMIPS, R_CALLPOWER:
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case R_CALL, R_CALLARM, R_CALLARM64, R_CALLMIPS, R_CALLPOWER, R_CALLRISCV:
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return true
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}
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return false
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@ -4,9 +4,9 @@ package objabi
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import "strconv"
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const _RelocType_name = "R_ADDRR_ADDRPOWERR_ADDRARM64R_ADDRMIPSR_ADDROFFR_WEAKADDROFFR_SIZER_CALLR_CALLARMR_CALLARM64R_CALLINDR_CALLPOWERR_CALLMIPSR_CONSTR_PCRELR_TLS_LER_TLS_IER_GOTOFFR_PLT0R_PLT1R_PLT2R_USEFIELDR_USETYPER_METHODOFFR_POWER_TOCR_GOTPCRELR_JMPMIPSR_DWARFSECREFR_DWARFFILEREFR_ARM64_TLS_LER_ARM64_TLS_IER_ARM64_GOTPCRELR_ARM64_GOTR_ARM64_PCRELR_ARM64_LDST8R_ARM64_LDST32R_ARM64_LDST64R_ARM64_LDST128R_POWER_TLS_LER_POWER_TLS_IER_POWER_TLSR_ADDRPOWER_DSR_ADDRPOWER_GOTR_ADDRPOWER_PCRELR_ADDRPOWER_TOCRELR_ADDRPOWER_TOCREL_DSR_PCRELDBLR_ADDRMIPSUR_ADDRMIPSTLSR_ADDRCUOFFR_WASMIMPORTR_XCOFFREF"
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const _RelocType_name = "R_ADDRR_ADDRPOWERR_ADDRARM64R_ADDRMIPSR_ADDROFFR_WEAKADDROFFR_SIZER_CALLR_CALLARMR_CALLARM64R_CALLINDR_CALLPOWERR_CALLMIPSR_CALLRISCVR_CONSTR_PCRELR_TLS_LER_TLS_IER_GOTOFFR_PLT0R_PLT1R_PLT2R_USEFIELDR_USETYPER_METHODOFFR_POWER_TOCR_GOTPCRELR_JMPMIPSR_DWARFSECREFR_DWARFFILEREFR_ARM64_TLS_LER_ARM64_TLS_IER_ARM64_GOTPCRELR_ARM64_GOTR_ARM64_PCRELR_ARM64_LDST8R_ARM64_LDST32R_ARM64_LDST64R_ARM64_LDST128R_POWER_TLS_LER_POWER_TLS_IER_POWER_TLSR_ADDRPOWER_DSR_ADDRPOWER_GOTR_ADDRPOWER_PCRELR_ADDRPOWER_TOCRELR_ADDRPOWER_TOCREL_DSR_RISCV_PCREL_ITYPER_RISCV_PCREL_STYPER_PCRELDBLR_ADDRMIPSUR_ADDRMIPSTLSR_ADDRCUOFFR_WASMIMPORTR_XCOFFREF"
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var _RelocType_index = [...]uint16{0, 6, 17, 28, 38, 47, 60, 66, 72, 81, 92, 101, 112, 122, 129, 136, 144, 152, 160, 166, 172, 178, 188, 197, 208, 219, 229, 238, 251, 265, 279, 293, 309, 320, 333, 346, 360, 374, 389, 403, 417, 428, 442, 457, 474, 492, 513, 523, 534, 547, 558, 570, 580}
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var _RelocType_index = [...]uint16{0, 6, 17, 28, 38, 47, 60, 66, 72, 81, 92, 101, 112, 122, 133, 140, 147, 155, 163, 171, 177, 183, 189, 199, 208, 219, 230, 240, 249, 262, 276, 290, 304, 320, 331, 344, 357, 371, 385, 400, 414, 428, 439, 453, 468, 485, 503, 524, 543, 562, 572, 583, 596, 607, 619, 629}
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func (i RelocType) String() string {
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i -= 1
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@ -258,7 +258,10 @@ func determineLinkMode(ctxt *Link) {
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Exitf("internal linking requested %sbut external linking required: %s", via, extReason)
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}
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case LinkExternal:
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if objabi.GOARCH == "ppc64" && objabi.GOOS != "aix" {
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switch {
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case objabi.GOARCH == "riscv64":
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Exitf("external linking not supported for %s/riscv64", objabi.GOOS)
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case objabi.GOARCH == "ppc64" && objabi.GOOS != "aix":
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Exitf("external linking not supported for %s/ppc64", objabi.GOOS)
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}
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}
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@ -176,6 +176,7 @@ const (
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EM_MIPS_RS4_BE = 10
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EM_ALPHA_STD = 41
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EM_ALPHA = 0x9026
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EM_RISCV = 243
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SHN_UNDEF = 0
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SHN_LORESERVE = 0xff00
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SHN_LOPROC = 0xff00
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@ -485,7 +486,7 @@ var buildinfo []byte
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func Elfinit(ctxt *Link) {
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ctxt.IsELF = true
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if ctxt.Arch.InFamily(sys.AMD64, sys.ARM64, sys.MIPS64, sys.PPC64, sys.S390X) {
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if ctxt.Arch.InFamily(sys.AMD64, sys.ARM64, sys.MIPS64, sys.PPC64, sys.RISCV64, sys.S390X) {
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elfRelType = ".rela"
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} else {
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elfRelType = ".rel"
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@ -500,7 +501,7 @@ func Elfinit(ctxt *Link) {
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ehdr.flags = 2 /* Version 2 ABI */
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}
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fallthrough
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case sys.AMD64, sys.ARM64, sys.MIPS64:
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case sys.AMD64, sys.ARM64, sys.MIPS64, sys.RISCV64:
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if ctxt.Arch.Family == sys.MIPS64 {
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ehdr.flags = 0x20000004 /* MIPS 3 CPIC */
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}
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@ -1758,6 +1759,8 @@ func Asmbelf(ctxt *Link, symo int64) {
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eh.machine = EM_386
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case sys.PPC64:
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eh.machine = EM_PPC64
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case sys.RISCV64:
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eh.machine = EM_RISCV
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case sys.S390X:
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eh.machine = EM_S390
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}
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122
src/cmd/link/internal/riscv64/asm.go
Normal file
122
src/cmd/link/internal/riscv64/asm.go
Normal file
@ -0,0 +1,122 @@
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// Copyright 2019 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package riscv64
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import (
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"cmd/internal/objabi"
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"cmd/internal/sys"
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"cmd/link/internal/ld"
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"cmd/link/internal/sym"
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"fmt"
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"log"
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)
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func gentext(ctxt *ld.Link) {
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}
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func adddynrela(ctxt *ld.Link, rel *sym.Symbol, s *sym.Symbol, r *sym.Reloc) {
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log.Fatalf("adddynrela not implemented")
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}
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func adddynrel(ctxt *ld.Link, s *sym.Symbol, r *sym.Reloc) bool {
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log.Fatalf("adddynrel not implemented")
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return false
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}
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func elfreloc1(ctxt *ld.Link, r *sym.Reloc, sectoff int64) bool {
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log.Fatalf("elfreloc1")
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return false
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}
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func elfsetupplt(ctxt *ld.Link) {
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log.Fatalf("elfsetuplt")
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}
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func machoreloc1(arch *sys.Arch, out *ld.OutBuf, s *sym.Symbol, r *sym.Reloc, sectoff int64) bool {
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log.Fatalf("machoreloc1 not implemented")
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return false
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}
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func archreloc(ctxt *ld.Link, r *sym.Reloc, s *sym.Symbol, val int64) (int64, bool) {
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// TODO(jsing): Implement.
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log.Fatalf("archreloc not implemented")
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return val, false
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}
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func archrelocvariant(ctxt *ld.Link, r *sym.Reloc, s *sym.Symbol, t int64) int64 {
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log.Fatalf("archrelocvariant")
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return -1
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}
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func asmb(ctxt *ld.Link) {
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if ctxt.IsELF {
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ld.Asmbelfsetup()
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}
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sect := ld.Segtext.Sections[0]
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ctxt.Out.SeekSet(int64(sect.Vaddr - ld.Segtext.Vaddr + ld.Segtext.Fileoff))
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ld.Codeblk(ctxt, int64(sect.Vaddr), int64(sect.Length))
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for _, sect = range ld.Segtext.Sections[1:] {
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ctxt.Out.SeekSet(int64(sect.Vaddr - ld.Segtext.Vaddr + ld.Segtext.Fileoff))
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ld.Datblk(ctxt, int64(sect.Vaddr), int64(sect.Length))
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}
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if ld.Segrodata.Filelen > 0 {
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ctxt.Out.SeekSet(int64(ld.Segrodata.Fileoff))
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ld.Datblk(ctxt, int64(ld.Segrodata.Vaddr), int64(ld.Segrodata.Filelen))
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}
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if ld.Segrelrodata.Filelen > 0 {
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ctxt.Out.SeekSet(int64(ld.Segrelrodata.Fileoff))
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ld.Datblk(ctxt, int64(ld.Segrelrodata.Vaddr), int64(ld.Segrelrodata.Filelen))
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}
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ctxt.Out.SeekSet(int64(ld.Segdata.Fileoff))
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ld.Datblk(ctxt, int64(ld.Segdata.Vaddr), int64(ld.Segdata.Filelen))
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ctxt.Out.SeekSet(int64(ld.Segdwarf.Fileoff))
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ld.Dwarfblk(ctxt, int64(ld.Segdwarf.Vaddr), int64(ld.Segdwarf.Filelen))
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}
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func asmb2(ctxt *ld.Link) {
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ld.Symsize = 0
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ld.Lcsize = 0
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symo := uint32(0)
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if !*ld.FlagS {
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if !ctxt.IsELF {
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ld.Errorf(nil, "unsupported executable format")
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}
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symo = uint32(ld.Segdwarf.Fileoff + ld.Segdwarf.Filelen)
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symo = uint32(ld.Rnd(int64(symo), int64(*ld.FlagRound)))
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ctxt.Out.SeekSet(int64(symo))
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ld.Asmelfsym(ctxt)
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ctxt.Out.Flush()
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ctxt.Out.Write(ld.Elfstrdat)
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if ctxt.LinkMode == ld.LinkExternal {
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ld.Elfemitreloc(ctxt)
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}
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}
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ctxt.Out.SeekSet(0)
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switch ctxt.HeadType {
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case objabi.Hlinux:
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ld.Asmbelf(ctxt, int64(symo))
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default:
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ld.Errorf(nil, "unsupported operating system")
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}
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ctxt.Out.Flush()
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if *ld.FlagC {
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fmt.Printf("textsize=%d\n", ld.Segtext.Filelen)
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fmt.Printf("datsize=%d\n", ld.Segdata.Filelen)
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fmt.Printf("bsssize=%d\n", ld.Segdata.Length-ld.Segdata.Filelen)
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fmt.Printf("symsize=%d\n", ld.Symsize)
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fmt.Printf("lcsize=%d\n", ld.Lcsize)
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fmt.Printf("total=%d\n", ld.Segtext.Filelen+ld.Segdata.Length+uint64(ld.Symsize)+uint64(ld.Lcsize))
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}
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}
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14
src/cmd/link/internal/riscv64/l.go
Normal file
14
src/cmd/link/internal/riscv64/l.go
Normal file
@ -0,0 +1,14 @@
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// Copyright 2019 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package riscv64
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const (
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maxAlign = 32 // max data alignment
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minAlign = 1
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funcAlign = 8
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dwarfRegLR = 1
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dwarfRegSP = 2
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)
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60
src/cmd/link/internal/riscv64/obj.go
Normal file
60
src/cmd/link/internal/riscv64/obj.go
Normal file
@ -0,0 +1,60 @@
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// Copyright 2019 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package riscv64
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import (
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"cmd/internal/objabi"
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"cmd/internal/sys"
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"cmd/link/internal/ld"
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)
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func Init() (*sys.Arch, ld.Arch) {
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arch := sys.ArchRISCV64
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theArch := ld.Arch{
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Funcalign: funcAlign,
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Maxalign: maxAlign,
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Minalign: minAlign,
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Dwarfregsp: dwarfRegSP,
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Dwarfreglr: dwarfRegLR,
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Adddynrel: adddynrel,
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Archinit: archinit,
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Archreloc: archreloc,
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Archrelocvariant: archrelocvariant,
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Asmb: asmb,
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Asmb2: asmb2,
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Elfreloc1: elfreloc1,
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Elfsetupplt: elfsetupplt,
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Gentext: gentext,
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Machoreloc1: machoreloc1,
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Linuxdynld: "/lib/ld.so.1",
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Freebsddynld: "XXX",
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Netbsddynld: "XXX",
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Openbsddynld: "XXX",
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Dragonflydynld: "XXX",
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Solarisdynld: "XXX",
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}
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return arch, theArch
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}
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func archinit(ctxt *ld.Link) {
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switch ctxt.HeadType {
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case objabi.Hlinux:
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ld.Elfinit(ctxt)
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ld.HEADR = ld.ELFRESERVE
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if *ld.FlagTextAddr == -1 {
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*ld.FlagTextAddr = 0x10000 + int64(ld.HEADR)
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}
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if *ld.FlagRound == -1 {
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*ld.FlagRound = 0x10000
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}
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default:
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ld.Exitf("unknown -H option: %v", ctxt.HeadType)
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}
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}
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@ -14,6 +14,7 @@ import (
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"cmd/link/internal/mips"
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"cmd/link/internal/mips64"
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"cmd/link/internal/ppc64"
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"cmd/link/internal/riscv64"
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"cmd/link/internal/s390x"
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"cmd/link/internal/wasm"
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"cmd/link/internal/x86"
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@ -57,6 +58,8 @@ func main() {
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arch, theArch = mips64.Init()
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case "ppc64", "ppc64le":
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arch, theArch = ppc64.Init()
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case "riscv64":
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arch, theArch = riscv64.Init()
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case "s390x":
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arch, theArch = s390x.Init()
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case "wasm":
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