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authorWim <wim@42.be>2018-08-06 21:47:05 +0200
committerWim <wim@42.be>2018-08-06 21:47:05 +0200
commit51062863a5c34d81e296cf15c61140911037cf3b (patch)
tree9b5e044672486326c7a0ca8fb26430f37bf4d83c /vendor/github.com/google/gops/internal/obj/util.go
parent4fb4b7aa6c02a54db8ad8dd98e4d321396926c0d (diff)
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Use mod vendor for vendored directory (backwards compatible)
Diffstat (limited to 'vendor/github.com/google/gops/internal/obj/util.go')
-rw-r--r--vendor/github.com/google/gops/internal/obj/util.go499
1 files changed, 0 insertions, 499 deletions
diff --git a/vendor/github.com/google/gops/internal/obj/util.go b/vendor/github.com/google/gops/internal/obj/util.go
deleted file mode 100644
index 9f1c6f08..00000000
--- a/vendor/github.com/google/gops/internal/obj/util.go
+++ /dev/null
@@ -1,499 +0,0 @@
-// Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package obj
-
-import (
- "bytes"
- "fmt"
- "log"
- "os"
- "strings"
- "time"
-)
-
-const REG_NONE = 0
-
-var start time.Time
-
-func Cputime() float64 {
- if start.IsZero() {
- start = time.Now()
- }
- return time.Since(start).Seconds()
-}
-
-func envOr(key, value string) string {
- if x := os.Getenv(key); x != "" {
- return x
- }
- return value
-}
-
-var (
- GOROOT = envOr("GOROOT", defaultGOROOT)
- GOARCH = envOr("GOARCH", defaultGOARCH)
- GOOS = envOr("GOOS", defaultGOOS)
- GO386 = envOr("GO386", defaultGO386)
- GOARM = goarm()
- Version = version
-)
-
-func goarm() int {
- switch v := envOr("GOARM", defaultGOARM); v {
- case "5":
- return 5
- case "6":
- return 6
- case "7":
- return 7
- }
- // Fail here, rather than validate at multiple call sites.
- log.Fatalf("Invalid GOARM value. Must be 5, 6, or 7.")
- panic("unreachable")
-}
-
-func Getgoextlinkenabled() string {
- return envOr("GO_EXTLINK_ENABLED", defaultGO_EXTLINK_ENABLED)
-}
-
-func (p *Prog) Line() string {
- return p.Ctxt.LineHist.LineString(int(p.Lineno))
-}
-
-var armCondCode = []string{
- ".EQ",
- ".NE",
- ".CS",
- ".CC",
- ".MI",
- ".PL",
- ".VS",
- ".VC",
- ".HI",
- ".LS",
- ".GE",
- ".LT",
- ".GT",
- ".LE",
- "",
- ".NV",
-}
-
-/* ARM scond byte */
-const (
- C_SCOND = (1 << 4) - 1
- C_SBIT = 1 << 4
- C_PBIT = 1 << 5
- C_WBIT = 1 << 6
- C_FBIT = 1 << 7
- C_UBIT = 1 << 7
- C_SCOND_XOR = 14
-)
-
-// CConv formats ARM condition codes.
-func CConv(s uint8) string {
- if s == 0 {
- return ""
- }
- sc := armCondCode[(s&C_SCOND)^C_SCOND_XOR]
- if s&C_SBIT != 0 {
- sc += ".S"
- }
- if s&C_PBIT != 0 {
- sc += ".P"
- }
- if s&C_WBIT != 0 {
- sc += ".W"
- }
- if s&C_UBIT != 0 { /* ambiguous with FBIT */
- sc += ".U"
- }
- return sc
-}
-
-func (p *Prog) String() string {
- if p == nil {
- return "<nil Prog>"
- }
-
- if p.Ctxt == nil {
- return "<Prog without ctxt>"
- }
-
- sc := CConv(p.Scond)
-
- var buf bytes.Buffer
-
- fmt.Fprintf(&buf, "%.5d (%v)\t%v%s", p.Pc, p.Line(), p.As, sc)
- sep := "\t"
- quadOpAmd64 := p.RegTo2 == -1
- if quadOpAmd64 {
- fmt.Fprintf(&buf, "%s$%d", sep, p.From3.Offset)
- sep = ", "
- }
- if p.From.Type != TYPE_NONE {
- fmt.Fprintf(&buf, "%s%v", sep, Dconv(p, &p.From))
- sep = ", "
- }
- if p.Reg != REG_NONE {
- // Should not happen but might as well show it if it does.
- fmt.Fprintf(&buf, "%s%v", sep, Rconv(int(p.Reg)))
- sep = ", "
- }
- if p.From3Type() != TYPE_NONE {
- if p.From3.Type == TYPE_CONST && p.As == ATEXT {
- // Special case - omit $.
- fmt.Fprintf(&buf, "%s%d", sep, p.From3.Offset)
- } else if quadOpAmd64 {
- fmt.Fprintf(&buf, "%s%v", sep, Rconv(int(p.From3.Reg)))
- } else {
- fmt.Fprintf(&buf, "%s%v", sep, Dconv(p, p.From3))
- }
- sep = ", "
- }
- if p.To.Type != TYPE_NONE {
- fmt.Fprintf(&buf, "%s%v", sep, Dconv(p, &p.To))
- }
- if p.RegTo2 != REG_NONE && !quadOpAmd64 {
- fmt.Fprintf(&buf, "%s%v", sep, Rconv(int(p.RegTo2)))
- }
- return buf.String()
-}
-
-func (ctxt *Link) NewProg() *Prog {
- var p *Prog
- if i := ctxt.allocIdx; i < len(ctxt.progs) {
- p = &ctxt.progs[i]
- ctxt.allocIdx = i + 1
- } else {
- p = new(Prog) // should be the only call to this; all others should use ctxt.NewProg
- }
- p.Ctxt = ctxt
- return p
-}
-func (ctxt *Link) freeProgs() {
- s := ctxt.progs[:ctxt.allocIdx]
- for i := range s {
- s[i] = Prog{}
- }
- ctxt.allocIdx = 0
-}
-
-func (ctxt *Link) Line(n int) string {
- return ctxt.LineHist.LineString(n)
-}
-
-func Getcallerpc(interface{}) uintptr {
- return 1
-}
-
-func (ctxt *Link) Dconv(a *Addr) string {
- return Dconv(nil, a)
-}
-
-func Dconv(p *Prog, a *Addr) string {
- var str string
-
- switch a.Type {
- default:
- str = fmt.Sprintf("type=%d", a.Type)
-
- case TYPE_NONE:
- str = ""
- if a.Name != NAME_NONE || a.Reg != 0 || a.Sym != nil {
- str = fmt.Sprintf("%v(%v)(NONE)", Mconv(a), Rconv(int(a.Reg)))
- }
-
- case TYPE_REG:
- // TODO(rsc): This special case is for x86 instructions like
- // PINSRQ CX,$1,X6
- // where the $1 is included in the p->to Addr.
- // Move into a new field.
- if a.Offset != 0 {
- str = fmt.Sprintf("$%d,%v", a.Offset, Rconv(int(a.Reg)))
- break
- }
-
- str = Rconv(int(a.Reg))
- if a.Name != NAME_NONE || a.Sym != nil {
- str = fmt.Sprintf("%v(%v)(REG)", Mconv(a), Rconv(int(a.Reg)))
- }
-
- case TYPE_BRANCH:
- if a.Sym != nil {
- str = fmt.Sprintf("%s(SB)", a.Sym.Name)
- } else if p != nil && p.Pcond != nil {
- str = fmt.Sprint(p.Pcond.Pc)
- } else if a.Val != nil {
- str = fmt.Sprint(a.Val.(*Prog).Pc)
- } else {
- str = fmt.Sprintf("%d(PC)", a.Offset)
- }
-
- case TYPE_INDIR:
- str = fmt.Sprintf("*%s", Mconv(a))
-
- case TYPE_MEM:
- str = Mconv(a)
- if a.Index != REG_NONE {
- str += fmt.Sprintf("(%v*%d)", Rconv(int(a.Index)), int(a.Scale))
- }
-
- case TYPE_CONST:
- if a.Reg != 0 {
- str = fmt.Sprintf("$%v(%v)", Mconv(a), Rconv(int(a.Reg)))
- } else {
- str = fmt.Sprintf("$%v", Mconv(a))
- }
-
- case TYPE_TEXTSIZE:
- if a.Val.(int32) == ArgsSizeUnknown {
- str = fmt.Sprintf("$%d", a.Offset)
- } else {
- str = fmt.Sprintf("$%d-%d", a.Offset, a.Val.(int32))
- }
-
- case TYPE_FCONST:
- str = fmt.Sprintf("%.17g", a.Val.(float64))
- // Make sure 1 prints as 1.0
- if !strings.ContainsAny(str, ".e") {
- str += ".0"
- }
- str = fmt.Sprintf("$(%s)", str)
-
- case TYPE_SCONST:
- str = fmt.Sprintf("$%q", a.Val.(string))
-
- case TYPE_ADDR:
- str = fmt.Sprintf("$%s", Mconv(a))
-
- case TYPE_SHIFT:
- v := int(a.Offset)
- ops := "<<>>->@>"
- switch GOARCH {
- case "arm":
- op := ops[((v>>5)&3)<<1:]
- if v&(1<<4) != 0 {
- str = fmt.Sprintf("R%d%c%cR%d", v&15, op[0], op[1], (v>>8)&15)
- } else {
- str = fmt.Sprintf("R%d%c%c%d", v&15, op[0], op[1], (v>>7)&31)
- }
- if a.Reg != 0 {
- str += fmt.Sprintf("(%v)", Rconv(int(a.Reg)))
- }
- case "arm64":
- op := ops[((v>>22)&3)<<1:]
- str = fmt.Sprintf("R%d%c%c%d", (v>>16)&31, op[0], op[1], (v>>10)&63)
- default:
- panic("TYPE_SHIFT is not supported on " + GOARCH)
- }
-
- case TYPE_REGREG:
- str = fmt.Sprintf("(%v, %v)", Rconv(int(a.Reg)), Rconv(int(a.Offset)))
-
- case TYPE_REGREG2:
- str = fmt.Sprintf("%v, %v", Rconv(int(a.Reg)), Rconv(int(a.Offset)))
-
- case TYPE_REGLIST:
- str = regListConv(int(a.Offset))
- }
-
- return str
-}
-
-func Mconv(a *Addr) string {
- var str string
-
- switch a.Name {
- default:
- str = fmt.Sprintf("name=%d", a.Name)
-
- case NAME_NONE:
- switch {
- case a.Reg == REG_NONE:
- str = fmt.Sprint(a.Offset)
- case a.Offset == 0:
- str = fmt.Sprintf("(%v)", Rconv(int(a.Reg)))
- case a.Offset != 0:
- str = fmt.Sprintf("%d(%v)", a.Offset, Rconv(int(a.Reg)))
- }
-
- case NAME_EXTERN:
- if a.Sym != nil {
- str = fmt.Sprintf("%s%s(SB)", a.Sym.Name, offConv(a.Offset))
- } else {
- str = fmt.Sprintf("%s(SB)", offConv(a.Offset))
- }
-
- case NAME_GOTREF:
- if a.Sym != nil {
- str = fmt.Sprintf("%s%s@GOT(SB)", a.Sym.Name, offConv(a.Offset))
- } else {
- str = fmt.Sprintf("%s@GOT(SB)", offConv(a.Offset))
- }
-
- case NAME_STATIC:
- if a.Sym != nil {
- str = fmt.Sprintf("%s<>%s(SB)", a.Sym.Name, offConv(a.Offset))
- } else {
- str = fmt.Sprintf("<>%s(SB)", offConv(a.Offset))
- }
-
- case NAME_AUTO:
- if a.Sym != nil {
- str = fmt.Sprintf("%s%s(SP)", a.Sym.Name, offConv(a.Offset))
- } else {
- str = fmt.Sprintf("%s(SP)", offConv(a.Offset))
- }
-
- case NAME_PARAM:
- if a.Sym != nil {
- str = fmt.Sprintf("%s%s(FP)", a.Sym.Name, offConv(a.Offset))
- } else {
- str = fmt.Sprintf("%s(FP)", offConv(a.Offset))
- }
- }
- return str
-}
-
-func offConv(off int64) string {
- if off == 0 {
- return ""
- }
- return fmt.Sprintf("%+d", off)
-}
-
-type regSet struct {
- lo int
- hi int
- Rconv func(int) string
-}
-
-// Few enough architectures that a linear scan is fastest.
-// Not even worth sorting.
-var regSpace []regSet
-
-/*
- Each architecture defines a register space as a unique
- integer range.
- Here is the list of architectures and the base of their register spaces.
-*/
-
-const (
- // Because of masking operations in the encodings, each register
- // space should start at 0 modulo some power of 2.
- RBase386 = 1 * 1024
- RBaseAMD64 = 2 * 1024
- RBaseARM = 3 * 1024
- RBasePPC64 = 4 * 1024 // range [4k, 8k)
- RBaseARM64 = 8 * 1024 // range [8k, 13k)
- RBaseMIPS64 = 13 * 1024 // range [13k, 14k)
- RBaseS390X = 14 * 1024 // range [14k, 15k)
-)
-
-// RegisterRegister binds a pretty-printer (Rconv) for register
-// numbers to a given register number range. Lo is inclusive,
-// hi exclusive (valid registers are lo through hi-1).
-func RegisterRegister(lo, hi int, Rconv func(int) string) {
- regSpace = append(regSpace, regSet{lo, hi, Rconv})
-}
-
-func Rconv(reg int) string {
- if reg == REG_NONE {
- return "NONE"
- }
- for i := range regSpace {
- rs := &regSpace[i]
- if rs.lo <= reg && reg < rs.hi {
- return rs.Rconv(reg)
- }
- }
- return fmt.Sprintf("R???%d", reg)
-}
-
-func regListConv(list int) string {
- str := ""
-
- for i := 0; i < 16; i++ { // TODO: 16 is ARM-specific.
- if list&(1<<uint(i)) != 0 {
- if str == "" {
- str += "["
- } else {
- str += ","
- }
- // This is ARM-specific; R10 is g.
- if i == 10 {
- str += "g"
- } else {
- str += fmt.Sprintf("R%d", i)
- }
- }
- }
-
- str += "]"
- return str
-}
-
-type opSet struct {
- lo As
- names []string
-}
-
-// Not even worth sorting
-var aSpace []opSet
-
-// RegisterOpcode binds a list of instruction names
-// to a given instruction number range.
-func RegisterOpcode(lo As, Anames []string) {
- if len(Anames) > AllowedOpCodes {
- panic(fmt.Sprintf("too many instructions, have %d max %d", len(Anames), AllowedOpCodes))
- }
- aSpace = append(aSpace, opSet{lo, Anames})
-}
-
-func (a As) String() string {
- if 0 <= a && int(a) < len(Anames) {
- return Anames[a]
- }
- for i := range aSpace {
- as := &aSpace[i]
- if as.lo <= a && int(a-as.lo) < len(as.names) {
- return as.names[a-as.lo]
- }
- }
- return fmt.Sprintf("A???%d", a)
-}
-
-var Anames = []string{
- "XXX",
- "CALL",
- "DUFFCOPY",
- "DUFFZERO",
- "END",
- "FUNCDATA",
- "JMP",
- "NOP",
- "PCDATA",
- "RET",
- "TEXT",
- "TYPE",
- "UNDEF",
- "USEFIELD",
- "VARDEF",
- "VARKILL",
- "VARLIVE",
-}
-
-func Bool2int(b bool) int {
- // The compiler currently only optimizes this form.
- // See issue 6011.
- var i int
- if b {
- i = 1
- } else {
- i = 0
- }
- return i
-}