diff --git a/src/cmd/internal/objfile/elf.go b/src/cmd/internal/objfile/elf.go index 8495fa753246a3bb9d54c230729648a07979b386..17755b84d2cfa78fd052cfb2f64fa263eaa71bdb 100644 --- a/src/cmd/internal/objfile/elf.go +++ b/src/cmd/internal/objfile/elf.go @@ -8,6 +8,7 @@ package objfile import ( "debug/elf" + "fmt" "os" ) @@ -77,3 +78,27 @@ func (f *elfFile) pcln() (textStart uint64, symtab, pclntab []byte, err error) { } return textStart, symtab, pclntab, nil } + +func (f *elfFile) text() (textStart uint64, text []byte, err error) { + sect := f.elf.Section(".text") + if sect == nil { + return 0, nil, fmt.Errorf("text section not found") + } + textStart = sect.Addr + text, err = sect.Data() + return +} + +func (f *elfFile) goarch() string { + switch f.elf.Machine { + case elf.EM_386: + return "386" + case elf.EM_X86_64: + return "amd64" + case elf.EM_ARM: + return "arm" + case elf.EM_PPC64: + return "power64" + } + return "" +} diff --git a/src/cmd/internal/objfile/goobj.go b/src/cmd/internal/objfile/goobj.go index a4f49ebe44db2e3f9be636be87dff4295e28b8da..a1d773023dc551bbfd4103b3b186e3b128306d34 100644 --- a/src/cmd/internal/objfile/goobj.go +++ b/src/cmd/internal/objfile/goobj.go @@ -79,3 +79,15 @@ func (f *goobjFile) symbols() ([]Sym, error) { func (f *goobjFile) pcln() (textStart uint64, symtab, pclntab []byte, err error) { return 0, nil, nil, fmt.Errorf("pcln not available in go object file") } + +// text does not make sense for Go object files, because +// each function has a separate section. +func (f *goobjFile) text() (textStart uint64, text []byte, err error) { + return 0, nil, fmt.Errorf("text not available in go object file") +} + +// goarch makes sense but is not exposed in debug/goobj's API, +// and we don't need it yet for any users of internal/objfile. +func (f *goobjFile) goarch() string { + return "GOARCH unimplemented for debug/goobj files" +} diff --git a/src/cmd/internal/objfile/macho.go b/src/cmd/internal/objfile/macho.go index f845792ffa71c782681172d2ae9a2dbcbfccffdb..7dd84a339db519a4d0ea445ff6ab9fad71c0d923 100644 --- a/src/cmd/internal/objfile/macho.go +++ b/src/cmd/internal/objfile/macho.go @@ -85,6 +85,30 @@ func (f *machoFile) pcln() (textStart uint64, symtab, pclntab []byte, err error) return textStart, symtab, pclntab, nil } +func (f *machoFile) text() (textStart uint64, text []byte, err error) { + sect := f.macho.Section("__text") + if sect == nil { + return 0, nil, fmt.Errorf("text section not found") + } + textStart = sect.Addr + text, err = sect.Data() + return +} + +func (f *machoFile) goarch() string { + switch f.macho.Cpu { + case macho.Cpu386: + return "386" + case macho.CpuAmd64: + return "amd64" + case macho.CpuArm: + return "arm" + case macho.CpuPpc64: + return "power64" + } + return "" +} + type uint64s []uint64 func (x uint64s) Len() int { return len(x) } diff --git a/src/cmd/internal/objfile/objfile.go b/src/cmd/internal/objfile/objfile.go index 09fa63e60bf234e9742d693d1bee4f2dc9f1668f..3d4a5d27cdbae8e2194b706cf9f0970fbacc9b2f 100644 --- a/src/cmd/internal/objfile/objfile.go +++ b/src/cmd/internal/objfile/objfile.go @@ -14,6 +14,8 @@ import ( type rawFile interface { symbols() (syms []Sym, err error) pcln() (textStart uint64, symtab, pclntab []byte, err error) + text() (textStart uint64, text []byte, err error) + goarch() string } // A File is an opened executable file. @@ -70,3 +72,11 @@ func (f *File) PCLineTable() (*gosym.Table, error) { } return gosym.NewTable(symtab, gosym.NewLineTable(pclntab, textStart)) } + +func (f *File) Text() (uint64, []byte, error) { + return f.raw.text() +} + +func (f *File) GOARCH() string { + return f.raw.goarch() +} diff --git a/src/cmd/internal/objfile/pe.go b/src/cmd/internal/objfile/pe.go index 868709eaf9e04a11e371e92822f0d2c78443e5cf..67e59c226b0f85dfaef20eec1183646e8c0ff6dc 100644 --- a/src/cmd/internal/objfile/pe.go +++ b/src/cmd/internal/objfile/pe.go @@ -133,6 +133,25 @@ func (f *peFile) pcln() (textStart uint64, symtab, pclntab []byte, err error) { return textStart, symtab, pclntab, nil } +func (f *peFile) text() (textStart uint64, text []byte, err error) { + var imageBase uint64 + switch oh := f.pe.OptionalHeader.(type) { + case *pe.OptionalHeader32: + imageBase = uint64(oh.ImageBase) + case *pe.OptionalHeader64: + imageBase = oh.ImageBase + default: + return 0, nil, fmt.Errorf("pe file format not recognized") + } + sect := f.pe.Section(".text") + if sect == nil { + return 0, nil, fmt.Errorf("text section not found") + } + textStart = imageBase + uint64(sect.VirtualAddress) + text, err = sect.Data() + return +} + func findPESymbol(f *pe.File, name string) (*pe.Symbol, error) { for _, s := range f.Symbols { if s.Name != name { @@ -168,3 +187,15 @@ func loadPETable(f *pe.File, sname, ename string) ([]byte, error) { } return data[ssym.Value:esym.Value], nil } + +func (f *peFile) goarch() string { + // Not sure how to get the info we want from PE header. + // Look in symbol table for telltale rt0 symbol. + if _, err := findPESymbol(f.pe, "_rt0_386_windows"); err == nil { + return "386" + } + if _, err := findPESymbol(f.pe, "_rt0_amd64_windows"); err == nil { + return "amd64" + } + return "" +} diff --git a/src/cmd/internal/objfile/plan9obj.go b/src/cmd/internal/objfile/plan9obj.go index 80744f82a8c8246d20a6647fec3963d21247da5e..eb6cba5eb1e8f281d7c7a0ba8328da292323acea 100644 --- a/src/cmd/internal/objfile/plan9obj.go +++ b/src/cmd/internal/objfile/plan9obj.go @@ -88,6 +88,16 @@ func (f *plan9File) pcln() (textStart uint64, symtab, pclntab []byte, err error) return textStart, symtab, pclntab, nil } +func (f *plan9File) text() (textStart uint64, text []byte, err error) { + sect := f.plan9.Section("text") + if sect == nil { + return 0, nil, fmt.Errorf("text section not found") + } + textStart = f.plan9.LoadAddress + f.plan9.HdrSize + text, err = sect.Data() + return +} + func findPlan9Symbol(f *plan9obj.File, name string) (*plan9obj.Sym, error) { syms, err := f.Symbols() if err != nil { @@ -122,3 +132,15 @@ func loadPlan9Table(f *plan9obj.File, sname, ename string) ([]byte, error) { textStart := f.LoadAddress + f.HdrSize return data[ssym.Value-textStart : esym.Value-textStart], nil } + +func (f *plan9File) goarch() string { + switch f.plan9.Magic { + case plan9obj.Magic386: + return "386" + case plan9obj.MagicAMD64: + return "amd64" + case plan9obj.MagicARM: + return "arm" + } + return "" +} diff --git a/src/cmd/objdump/Makefile b/src/cmd/objdump/Makefile deleted file mode 100644 index 1b66c26bab3f321fbdc3e4d029fe39709887204c..0000000000000000000000000000000000000000 --- a/src/cmd/objdump/Makefile +++ /dev/null @@ -1,10 +0,0 @@ -all: x86.go armasm.go - -x86.go: bundle - ./bundle -p main -x x86_ rsc.io/x86/x86asm | gofmt >x86.go - -armasm.go: bundle - ./bundle -p main -x arm_ rsc.io/arm/armasm | gofmt >armasm.go - -bundle: - go build -o bundle code.google.com/p/rsc/cmd/bundle diff --git a/src/cmd/objdump/elf.go b/src/cmd/objdump/elf.go deleted file mode 100644 index 906e903532cfe8d6ed104c730d0364858a3b865e..0000000000000000000000000000000000000000 --- a/src/cmd/objdump/elf.go +++ /dev/null @@ -1,65 +0,0 @@ -// Copyright 2013 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. - -// Parsing of ELF executables (Linux, FreeBSD, and so on). - -package main - -import ( - "debug/elf" - "os" -) - -func elfSymbols(f *os.File) (syms []Sym, goarch string) { - p, err := elf.NewFile(f) - if err != nil { - errorf("parsing %s: %v", f.Name(), err) - return - } - - elfSyms, err := p.Symbols() - if err != nil { - errorf("parsing %s: %v", f.Name(), err) - return - } - - switch p.Machine { - case elf.EM_X86_64: - goarch = "amd64" - case elf.EM_386: - goarch = "386" - case elf.EM_ARM: - goarch = "arm" - } - - for _, s := range elfSyms { - sym := Sym{Addr: s.Value, Name: s.Name, Size: int64(s.Size), Code: '?'} - switch s.Section { - case elf.SHN_UNDEF: - sym.Code = 'U' - case elf.SHN_COMMON: - sym.Code = 'B' - default: - i := int(s.Section) - if i < 0 || i >= len(p.Sections) { - break - } - sect := p.Sections[i] - switch sect.Flags & (elf.SHF_WRITE | elf.SHF_ALLOC | elf.SHF_EXECINSTR) { - case elf.SHF_ALLOC | elf.SHF_EXECINSTR: - sym.Code = 'T' - case elf.SHF_ALLOC: - sym.Code = 'R' - case elf.SHF_ALLOC | elf.SHF_WRITE: - sym.Code = 'D' - } - } - if elf.ST_BIND(s.Info) == elf.STB_LOCAL { - sym.Code += 'a' - 'A' - } - syms = append(syms, sym) - } - - return -} diff --git a/src/cmd/objdump/macho.go b/src/cmd/objdump/macho.go deleted file mode 100644 index 6e0ad223d471349054c2a416f9eb78613a5a063f..0000000000000000000000000000000000000000 --- a/src/cmd/objdump/macho.go +++ /dev/null @@ -1,77 +0,0 @@ -// Copyright 2013 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. - -// Parsing of Mach-O executables (OS X). - -package main - -import ( - "debug/macho" - "os" - "sort" -) - -func machoSymbols(f *os.File) (syms []Sym, goarch string) { - p, err := macho.NewFile(f) - if err != nil { - errorf("parsing %s: %v", f.Name(), err) - return - } - - if p.Symtab == nil { - errorf("%s: no symbol table", f.Name()) - return - } - - switch p.Cpu { - case macho.Cpu386: - goarch = "386" - case macho.CpuAmd64: - goarch = "amd64" - case macho.CpuArm: - goarch = "arm" - } - - // Build sorted list of addresses of all symbols. - // We infer the size of a symbol by looking at where the next symbol begins. - var addrs []uint64 - for _, s := range p.Symtab.Syms { - addrs = append(addrs, s.Value) - } - sort.Sort(uint64s(addrs)) - - for _, s := range p.Symtab.Syms { - sym := Sym{Name: s.Name, Addr: s.Value, Code: '?'} - i := sort.Search(len(addrs), func(x int) bool { return addrs[x] > s.Value }) - if i < len(addrs) { - sym.Size = int64(addrs[i] - s.Value) - } - if s.Sect == 0 { - sym.Code = 'U' - } else if int(s.Sect) <= len(p.Sections) { - sect := p.Sections[s.Sect-1] - switch sect.Seg { - case "__TEXT": - sym.Code = 'R' - case "__DATA": - sym.Code = 'D' - } - switch sect.Seg + " " + sect.Name { - case "__TEXT __text": - sym.Code = 'T' - case "__DATA __bss", "__DATA __noptrbss": - sym.Code = 'B' - } - } - syms = append(syms, sym) - } - - return -} - -type uint64s []uint64 - -func (x uint64s) Len() int { return len(x) } -func (x uint64s) Swap(i, j int) { x[i], x[j] = x[j], x[i] } -func (x uint64s) Less(i, j int) bool { return x[i] < x[j] } diff --git a/src/cmd/objdump/main.go b/src/cmd/objdump/main.go index 0f66f20a400131cf34b63559eb3eaa300b5d1c87..0f125c98bfc00f09d8542fbf9e865449f00bbad9 100644 --- a/src/cmd/objdump/main.go +++ b/src/cmd/objdump/main.go @@ -33,12 +33,7 @@ package main import ( "bufio" - "bytes" - "debug/elf" "debug/gosym" - "debug/macho" - "debug/pe" - "debug/plan9obj" "encoding/binary" "flag" "fmt" @@ -51,6 +46,8 @@ import ( "strings" "text/tabwriter" + "cmd/internal/objfile" + "cmd/internal/rsc.io/arm/armasm" "cmd/internal/rsc.io/x86/x86asm" ) @@ -85,21 +82,33 @@ func main() { symRE = re } - f, err := os.Open(flag.Arg(0)) + f, err := objfile.Open(flag.Arg(0)) if err != nil { log.Fatal(err) } - textStart, textData, symtab, pclntab, err := loadTables(f) + syms, err := f.Symbols() if err != nil { log.Fatalf("reading %s: %v", flag.Arg(0), err) } - syms, goarch, err := loadSymbols(f) + tab, err := f.PCLineTable() if err != nil { log.Fatalf("reading %s: %v", flag.Arg(0), err) } + textStart, textBytes, err := f.Text() + if err != nil { + log.Fatalf("reading %s: %v", flag.Arg(0), err) + } + + goarch := f.GOARCH() + + disasm := disasms[goarch] + if disasm == nil { + log.Fatalf("reading %s: unknown architecture", flag.Arg(0)) + } + // Filter out section symbols, overwriting syms in place. keep := syms[:0] for _, sym := range syms { @@ -112,37 +121,27 @@ func main() { } syms = keep - disasm := disasms[goarch] - if disasm == nil { - log.Fatalf("reading %s: unknown architecture", flag.Arg(0)) - } - + sort.Sort(ByAddr(syms)) lookup := func(addr uint64) (string, uint64) { - i := sort.Search(len(syms), func(i int) bool { return syms[i].Addr > addr }) + i := sort.Search(len(syms), func(i int) bool { return addr < syms[i].Addr }) if i > 0 { s := syms[i-1] - if s.Addr <= addr && addr < s.Addr+uint64(s.Size) && s.Name != "runtime.etext" && s.Name != "etext" && s.Name != "_etext" { + if s.Addr != 0 && s.Addr <= addr && addr < s.Addr+uint64(s.Size) { return s.Name, s.Addr } } return "", 0 } - pcln := gosym.NewLineTable(pclntab, textStart) - tab, err := gosym.NewTable(symtab, pcln) - if err != nil { - log.Fatalf("reading %s: %v", flag.Arg(0), err) - } - if flag.NArg() == 1 { // disassembly of entire object - our format - dump(tab, lookup, disasm, goarch, syms, textData, textStart) - os.Exit(exitCode) + dump(tab, lookup, disasm, goarch, syms, textBytes, textStart) + os.Exit(0) } // disassembly of specific piece of object - gnu objdump format for pprof - gnuDump(tab, lookup, disasm, textData, textStart) - os.Exit(exitCode) + gnuDump(tab, lookup, disasm, textBytes, textStart) + os.Exit(0) } // base returns the final element in the path. @@ -153,13 +152,13 @@ func base(path string) string { return path } -func dump(tab *gosym.Table, lookup lookupFunc, disasm disasmFunc, goarch string, syms []Sym, textData []byte, textStart uint64) { +func dump(tab *gosym.Table, lookup lookupFunc, disasm disasmFunc, goarch string, syms []objfile.Sym, textData []byte, textStart uint64) { stdout := bufio.NewWriter(os.Stdout) defer stdout.Flush() printed := false for _, sym := range syms { - if (sym.Code != 'T' && sym.Code != 't') || sym.Size == 0 || sym.Name == "_text" || sym.Name == "text" || sym.Addr < textStart || symRE != nil && !symRE.MatchString(sym.Name) { + if (sym.Code != 'T' && sym.Code != 't') || sym.Size == 0 || sym.Addr < textStart || symRE != nil && !symRE.MatchString(sym.Name) { continue } if sym.Addr >= textStart+uint64(len(textData)) || sym.Addr+uint64(sym.Size) > textStart+uint64(len(textData)) { @@ -307,224 +306,8 @@ func gnuDump(tab *gosym.Table, lookup lookupFunc, disasm disasmFunc, textData [] flush(end) } -func loadTables(f *os.File) (textStart uint64, textData, symtab, pclntab []byte, err error) { - if obj, err := elf.NewFile(f); err == nil { - if sect := obj.Section(".text"); sect != nil { - textStart = sect.Addr - textData, _ = sect.Data() - } - if sect := obj.Section(".gosymtab"); sect != nil { - if symtab, err = sect.Data(); err != nil { - return 0, nil, nil, nil, err - } - } - if sect := obj.Section(".gopclntab"); sect != nil { - if pclntab, err = sect.Data(); err != nil { - return 0, nil, nil, nil, err - } - } - return textStart, textData, symtab, pclntab, nil - } - - if obj, err := macho.NewFile(f); err == nil { - if sect := obj.Section("__text"); sect != nil { - textStart = sect.Addr - textData, _ = sect.Data() - } - if sect := obj.Section("__gosymtab"); sect != nil { - if symtab, err = sect.Data(); err != nil { - return 0, nil, nil, nil, err - } - } - if sect := obj.Section("__gopclntab"); sect != nil { - if pclntab, err = sect.Data(); err != nil { - return 0, nil, nil, nil, err - } - } - return textStart, textData, symtab, pclntab, nil - } - - if obj, err := pe.NewFile(f); err == nil { - var imageBase uint64 - switch oh := obj.OptionalHeader.(type) { - case *pe.OptionalHeader32: - imageBase = uint64(oh.ImageBase) - case *pe.OptionalHeader64: - imageBase = oh.ImageBase - default: - return 0, nil, nil, nil, fmt.Errorf("pe file format not recognized") - } - if sect := obj.Section(".text"); sect != nil { - textStart = imageBase + uint64(sect.VirtualAddress) - textData, _ = sect.Data() - } - if pclntab, err = loadPETable(obj, "runtime.pclntab", "runtime.epclntab"); err != nil { - // We didn't find the symbols, so look for the names used in 1.3 and earlier. - // TODO: Remove code looking for the old symbols when we no longer care about 1.3. - var err2 error - if pclntab, err2 = loadPETable(obj, "pclntab", "epclntab"); err2 != nil { - return 0, nil, nil, nil, err - } - } - if symtab, err = loadPETable(obj, "runtime.symtab", "runtime.esymtab"); err != nil { - // Same as above. - var err2 error - if symtab, err2 = loadPETable(obj, "symtab", "esymtab"); err2 != nil { - return 0, nil, nil, nil, err - } - } - return textStart, textData, symtab, pclntab, nil - } - - if obj, err := plan9obj.NewFile(f); err == nil { - textStart = obj.LoadAddress + obj.HdrSize - if sect := obj.Section("text"); sect != nil { - textData, _ = sect.Data() - } - if pclntab, err = loadPlan9Table(obj, "runtime.pclntab", "runtime.epclntab"); err != nil { - // We didn't find the symbols, so look for the names used in 1.3 and earlier. - // TODO: Remove code looking for the old symbols when we no longer care about 1.3. - var err2 error - if pclntab, err2 = loadPlan9Table(obj, "pclntab", "epclntab"); err2 != nil { - return 0, nil, nil, nil, err - } - } - if symtab, err = loadPlan9Table(obj, "runtime.symtab", "runtime.esymtab"); err != nil { - // Same as above. - var err2 error - if symtab, err2 = loadPlan9Table(obj, "symtab", "esymtab"); err2 != nil { - return 0, nil, nil, nil, err - } - } - return textStart, textData, symtab, pclntab, nil - } - - return 0, nil, nil, nil, fmt.Errorf("unrecognized binary format") -} - -func findPESymbol(f *pe.File, name string) (*pe.Symbol, error) { - for _, s := range f.Symbols { - if s.Name != name { - continue - } - if s.SectionNumber <= 0 { - return nil, fmt.Errorf("symbol %s: invalid section number %d", name, s.SectionNumber) - } - if len(f.Sections) < int(s.SectionNumber) { - return nil, fmt.Errorf("symbol %s: section number %d is larger than max %d", name, s.SectionNumber, len(f.Sections)) - } - return s, nil - } - return nil, fmt.Errorf("no %s symbol found", name) -} - -func loadPETable(f *pe.File, sname, ename string) ([]byte, error) { - ssym, err := findPESymbol(f, sname) - if err != nil { - return nil, err - } - esym, err := findPESymbol(f, ename) - if err != nil { - return nil, err - } - if ssym.SectionNumber != esym.SectionNumber { - return nil, fmt.Errorf("%s and %s symbols must be in the same section", sname, ename) - } - sect := f.Sections[ssym.SectionNumber-1] - data, err := sect.Data() - if err != nil { - return nil, err - } - return data[ssym.Value:esym.Value], nil -} - -func findPlan9Symbol(f *plan9obj.File, name string) (*plan9obj.Sym, error) { - syms, err := f.Symbols() - if err != nil { - return nil, err - } - for _, s := range syms { - if s.Name != name { - continue - } - return &s, nil - } - return nil, fmt.Errorf("no %s symbol found", name) -} - -func loadPlan9Table(f *plan9obj.File, sname, ename string) ([]byte, error) { - ssym, err := findPlan9Symbol(f, sname) - if err != nil { - return nil, err - } - esym, err := findPlan9Symbol(f, ename) - if err != nil { - return nil, err - } - sect := f.Section("text") - if sect == nil { - return nil, err - } - data, err := sect.Data() - if err != nil { - return nil, err - } - textStart := f.LoadAddress + f.HdrSize - return data[ssym.Value-textStart : esym.Value-textStart], nil -} - -// TODO(rsc): This code is taken from cmd/nm. Arrange some way to share the code. - -var exitCode = 0 - -func errorf(format string, args ...interface{}) { - log.Printf(format, args...) - exitCode = 1 -} - -func loadSymbols(f *os.File) (syms []Sym, goarch string, err error) { - f.Seek(0, 0) - buf := make([]byte, 16) - io.ReadFull(f, buf) - f.Seek(0, 0) - - for _, p := range parsers { - if bytes.HasPrefix(buf, p.prefix) { - syms, goarch = p.parse(f) - sort.Sort(byAddr(syms)) - return - } - } - err = fmt.Errorf("unknown file format") - return -} - -type Sym struct { - Addr uint64 - Size int64 - Code rune - Name string - Type string -} - -var parsers = []struct { - prefix []byte - parse func(*os.File) ([]Sym, string) -}{ - {[]byte("\x7FELF"), elfSymbols}, - {[]byte("\xFE\xED\xFA\xCE"), machoSymbols}, - {[]byte("\xFE\xED\xFA\xCF"), machoSymbols}, - {[]byte("\xCE\xFA\xED\xFE"), machoSymbols}, - {[]byte("\xCF\xFA\xED\xFE"), machoSymbols}, - {[]byte("MZ"), peSymbols}, - {[]byte("\x00\x00\x01\xEB"), plan9Symbols}, // 386 - {[]byte("\x00\x00\x04\x07"), plan9Symbols}, // mips - {[]byte("\x00\x00\x06\x47"), plan9Symbols}, // arm - {[]byte("\x00\x00\x8A\x97"), plan9Symbols}, // amd64 -} - -type byAddr []Sym +type ByAddr []objfile.Sym -func (x byAddr) Len() int { return len(x) } -func (x byAddr) Swap(i, j int) { x[i], x[j] = x[j], x[i] } -func (x byAddr) Less(i, j int) bool { return x[i].Addr < x[j].Addr } +func (x ByAddr) Less(i, j int) bool { return x[i].Addr < x[j].Addr } +func (x ByAddr) Len() int { return len(x) } +func (x ByAddr) Swap(i, j int) { x[i], x[j] = x[j], x[i] } diff --git a/src/cmd/objdump/pe.go b/src/cmd/objdump/pe.go deleted file mode 100644 index 38190095a3d510eb848d57b69a8347833d7dca91..0000000000000000000000000000000000000000 --- a/src/cmd/objdump/pe.go +++ /dev/null @@ -1,99 +0,0 @@ -// Copyright 2013 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. - -// Parsing of PE executables (Microsoft Windows). - -package main - -import ( - "debug/pe" - "os" - "sort" -) - -func peSymbols(f *os.File) (syms []Sym, goarch string) { - p, err := pe.NewFile(f) - if err != nil { - errorf("parsing %s: %v", f.Name(), err) - return - } - - // Build sorted list of addresses of all symbols. - // We infer the size of a symbol by looking at where the next symbol begins. - var addrs []uint64 - - var imageBase uint64 - switch oh := p.OptionalHeader.(type) { - case *pe.OptionalHeader32: - imageBase = uint64(oh.ImageBase) - goarch = "386" - case *pe.OptionalHeader64: - imageBase = oh.ImageBase - goarch = "amd64" - default: - errorf("parsing %s: file format not recognized", f.Name()) - return - } - - for _, s := range p.Symbols { - const ( - N_UNDEF = 0 // An undefined (extern) symbol - N_ABS = -1 // An absolute symbol (e_value is a constant, not an address) - N_DEBUG = -2 // A debugging symbol - ) - sym := Sym{Name: s.Name, Addr: uint64(s.Value), Code: '?'} - switch s.SectionNumber { - case N_UNDEF: - sym.Code = 'U' - case N_ABS: - sym.Code = 'C' - case N_DEBUG: - sym.Code = '?' - default: - if s.SectionNumber < 0 { - errorf("parsing %s: invalid section number %d", f.Name(), s.SectionNumber) - return - } - if len(p.Sections) < int(s.SectionNumber) { - errorf("parsing %s: section number %d is large then max %d", f.Name(), s.SectionNumber, len(p.Sections)) - return - } - sect := p.Sections[s.SectionNumber-1] - const ( - text = 0x20 - data = 0x40 - bss = 0x80 - permX = 0x20000000 - permR = 0x40000000 - permW = 0x80000000 - ) - ch := sect.Characteristics - switch { - case ch&text != 0: - sym.Code = 'T' - case ch&data != 0: - if ch&permW == 0 { - sym.Code = 'R' - } else { - sym.Code = 'D' - } - case ch&bss != 0: - sym.Code = 'B' - } - sym.Addr += imageBase + uint64(sect.VirtualAddress) - } - syms = append(syms, sym) - addrs = append(addrs, sym.Addr) - } - - sort.Sort(uint64s(addrs)) - for i := range syms { - j := sort.Search(len(addrs), func(x int) bool { return addrs[x] > syms[i].Addr }) - if j < len(addrs) { - syms[i].Size = int64(addrs[j] - syms[i].Addr) - } - } - - return -} diff --git a/src/cmd/objdump/plan9obj.go b/src/cmd/objdump/plan9obj.go deleted file mode 100644 index f851d4158c2e61a81ff0a9203d583ea074cf0150..0000000000000000000000000000000000000000 --- a/src/cmd/objdump/plan9obj.go +++ /dev/null @@ -1,70 +0,0 @@ -// Copyright 2014 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. - -// Parsing of Plan 9 a.out executables. - -package main - -import ( - "debug/plan9obj" - "os" - "sort" -) - -var validSymType = map[rune]bool{ - 'T': true, - 't': true, - 'D': true, - 'd': true, - 'B': true, - 'b': true, -} - -func plan9Symbols(f *os.File) (syms []Sym, goarch string) { - p, err := plan9obj.NewFile(f) - if err != nil { - errorf("parsing %s: %v", f.Name(), err) - return - } - - plan9Syms, err := p.Symbols() - if err != nil { - errorf("parsing %s: %v", f.Name(), err) - return - } - - switch p.Magic { - case plan9obj.MagicAMD64: - goarch = "amd64" - case plan9obj.Magic386: - goarch = "386" - case plan9obj.MagicARM: - goarch = "arm" - } - - // Build sorted list of addresses of all symbols. - // We infer the size of a symbol by looking at where the next symbol begins. - var addrs []uint64 - for _, s := range plan9Syms { - if !validSymType[s.Type] { - continue - } - addrs = append(addrs, s.Value) - } - sort.Sort(uint64s(addrs)) - - for _, s := range plan9Syms { - if !validSymType[s.Type] { - continue - } - sym := Sym{Addr: s.Value, Name: s.Name, Code: rune(s.Type)} - i := sort.Search(len(addrs), func(x int) bool { return addrs[x] > s.Value }) - if i < len(addrs) { - sym.Size = int64(addrs[i] - s.Value) - } - syms = append(syms, sym) - } - - return -}