How to use elfReadTextData method of backend Package

Best Syzkaller code snippet using backend.elfReadTextData

elf.go

Source:elf.go

...15	moduleObj []string, hostModules []host.KernelModule) (*Impl, error) {16	return makeDWARF(target, objDir, srcDir, buildDir, moduleObj, hostModules,17		&containerFns{18			readSymbols:           elfReadSymbols,19			readTextData:          elfReadTextData,20			readModuleCoverPoints: elfReadModuleCoverPoints,21			readTextRanges:        elfReadTextRanges,22		},23	)24}25func elfReadSymbols(module *Module, info *symbolInfo) ([]*Symbol, error) {26	file, err := elf.Open(module.Path)27	if err != nil {28		return nil, err29	}30	text := file.Section(".text")31	if text == nil {32		return nil, fmt.Errorf("no .text section in the object file")33	}34	allSymbols, err := file.Symbols()35	if err != nil {36		return nil, fmt.Errorf("failed to read ELF symbols: %v", err)37	}38	if module.Name == "" {39		info.textAddr = text.Addr40	}41	var symbols []*Symbol42	for i, symb := range allSymbols {43		if symb.Info&0xf != uint8(elf.STT_FUNC) && symb.Info&0xf != uint8(elf.STT_NOTYPE) {44			// Only save STT_FUNC, STT_NONE otherwise some symb range inside another symb range.45			continue46		}47		text := symb.Value >= text.Addr && symb.Value+symb.Size <= text.Addr+text.Size48		if text {49			start := symb.Value + module.Addr50			symbols = append(symbols, &Symbol{51				Module: module,52				ObjectUnit: ObjectUnit{53					Name: symb.Name,54				},55				Start: start,56				End:   start + symb.Size,57			})58		}59		if strings.HasPrefix(symb.Name, "__sanitizer_cov_trace_") {60			if symb.Name == "__sanitizer_cov_trace_pc" {61				info.tracePCIdx[i] = true62				if text {63					info.tracePC = symb.Value64				}65			} else {66				info.traceCmpIdx[i] = true67				if text {68					info.traceCmp[symb.Value] = true69				}70			}71		}72	}73	return symbols, nil74}75func elfReadTextRanges(module *Module) ([]pcRange, []*CompileUnit, error) {76	file, err := elf.Open(module.Path)77	if err != nil {78		return nil, nil, err79	}80	text := file.Section(".text")81	if text == nil {82		return nil, nil, fmt.Errorf("no .text section in the object file")83	}84	kaslr := file.Section(".rela.text") != nil85	debugInfo, err := file.DWARF()86	if err != nil {87		if module.Name != "" {88			log.Logf(0, "ignoring module %v without DEBUG_INFO", module.Name)89			return nil, nil, nil90		}91		return nil, nil, fmt.Errorf("failed to parse DWARF: %v (set CONFIG_DEBUG_INFO=y on linux)", err)92	}93	var pcFix pcFixFn94	if kaslr {95		pcFix = func(r [2]uint64) ([2]uint64, bool) {96			if r[0] >= r[1] || r[0] < text.Addr || r[1] > text.Addr+text.Size {97				// Linux kernel binaries with CONFIG_RANDOMIZE_BASE=y are strange.98				// .text starts at 0xffffffff81000000 and symbols point there as99				// well, but PC ranges point to addresses around 0.100				// So try to add text offset and retry the check.101				// It's unclear if we also need some offset on top of text.Addr,102				// it gives approximately correct addresses, but not necessary103				// precisely correct addresses.104				r[0] += text.Addr105				r[1] += text.Addr106				if r[0] >= r[1] || r[0] < text.Addr || r[1] > text.Addr+text.Size {107					return r, true108				}109			}110			return r, false111		}112	}113	return readTextRanges(debugInfo, module, pcFix)114}115func elfReadTextData(module *Module) ([]byte, error) {116	file, err := elf.Open(module.Path)117	if err != nil {118		return nil, err119	}120	text := file.Section(".text")121	if text == nil {122		return nil, fmt.Errorf("no .text section in the object file")123	}124	return text.Data()125}126func elfReadModuleCoverPoints(target *targets.Target, module *Module, info *symbolInfo) ([2][]uint64, error) {127	var pcs [2][]uint64128	file, err := elf.Open(module.Path)129	if err != nil {...

elfReadTextData

Using AI Code Generation

1import (2func main() {3    fmt.Println("Hello, playground")4}5import (6func main() {7    fmt.Println("Hello, playground")8}9import (10func main() {11    fmt.Println("Hello, playground")12}13import (14func main() {15    fmt.Println("Hello, playground")16}17import (18func main() {19    fmt.Println("Hello, playground")20}21import (22func main() {23    fmt.Println("Hello, playground")24}25import (26func main() {27    fmt.Println("Hello, playground")28}29import (30func main() {31    fmt.Println("Hello, playground")32}33import (34func main() {35    fmt.Println("Hello, playground")36}37import (38func main() {39    fmt.Println("Hello, playground")40}41import (42func main() {43    fmt.Println("Hello, playground")44}45import (46func main() {47    fmt.Println("Hello, playground")48}

elfReadTextData

Using AI Code Generation

1import (2func main() {3    elfReadTextData()4    fmt.Println("Hello, playground")5}6import (7func main() {8    elfReadTextData()9    fmt.Println("Hello, playground")10}11import (12func main() {13    elfReadTextData()14    fmt.Println("Hello, playground")15}16import (17func main() {18    elfReadTextData()19    fmt.Println("Hello, playground")20}21import (22func main() {23    elfReadTextData()24    fmt.Println("Hello, playground")25}26import (27func main() {28    elfReadTextData()29    fmt.Println("Hello, playground")30}31import (32func main() {33    elfReadTextData()34    fmt.Println("Hello, playground")35}36import (37func main() {38    elfReadTextData()39    fmt.Println("Hello, playground")40}41import (42func main() {43    elfReadTextData()44    fmt.Println("Hello, playground")45}46import (47func main() {48    elfReadTextData()49    fmt.Println("Hello, playground")50}51import (

elfReadTextData

Using AI Code Generation

1import (2func main() {3    fmt.Println("Hello, playground")4    backend.ElfReadTextData("/bin/ls")5}6import (7func main() {8    fmt.Println("Hello, playground")9    backend.ElfReadTextData("/bin/ls")10}11import (12func main() {13    fmt.Println("Hello, playground")14    backend.ElfReadTextData("/bin/ls")15}16import (17func main() {18    fmt.Println("Hello, playground")19    backend.ElfReadTextData("/bin/ls")20}21import (22func main() {23    fmt.Println("Hello, playground")24    backend.ElfReadTextData("/bin/ls")25}26import (27func main() {28    fmt.Println("Hello, playground")29    backend.ElfReadTextData("/bin/ls")30}31import (

elfReadTextData

Using AI Code Generation

1import (2func main() {3    if len(os.Args) < 2 {4        fmt.Fprintf(os.Stderr, "usage: %s elf-file5        os.Exit(1)6    }7    backend := elfBackend{}8    textData, err := backend.elfReadTextData(os.Args[1])9    if err != nil {10        fmt.Fprintf(os.Stderr, "%s: %s11        os.Exit(1)12    }13    fmt.Printf("%s14", strings.Join(textData, "15}16import (17func main() {18    if len(os.Args) < 2 {19        fmt.Fprintf(os.Stderr, "usage: %s elf-file20        os.Exit(1)21    }22    backend := elfBackend{}23    data, err := backend.elfReadData(os.Args[1])24    if err != nil {25        fmt.Fprintf(os.Stderr, "%s: %s26        os.Exit(1)27    }28    fmt.Printf("%s29", strings.Join(data, "30}31import (32func main() {33    if len(os.Args) < 2 {34        fmt.Fprintf(os.Stderr, "usage: %s elf-file35        os.Exit(1)36    }37    backend := elfBackend{}

elfReadTextData

Using AI Code Generation

1func main() {2    backend := new(Backend)3    backend.elfReadTextData("test.elf")4}5type Backend struct {6}7func (b *Backend) elfReadTextData(filename string) {8}9func TestElfReadTextData(t *testing.T) {10    backend := new(Backend)11    backend.elfReadTextData("test.elf")12}13--- PASS: TestElfReadTextData (0.00s)

elfReadTextData

Using AI Code Generation

1import (2func main() {3    if len(os.Args) < 2 {4        fmt.Println("Usage: go run 2.go <file>")5        os.Exit(1)6    }7    if _, err := os.Stat(file); os.IsNotExist(err) {8        fmt.Println("file doesn't exist")9        os.Exit(1)10    }11    text, err := elf.ElfReadTextData(file)12    if err != nil {13        fmt.Println(err)14        os.Exit(1)15    }16    tmpfile, err := os.Create("temp")17    if err != nil {18        fmt.Println(err)19        os.Exit(1)20    }21    tmpfile.Write(text)22    tmpfile.Close()23    cmd := exec.Command("go", "build", "temp")24    err = cmd.Run()25    if err != nil {26        fmt.Println(err)27        os.Exit(1)28    }29    os.Remove("temp")30    os.Remove("temp.exe")31}32import (33func ElfReadTextData(fileName string) ([]byte, error) {34    file, err := os.Open(fileName)35    if err != nil {36    }37    defer file.Close()38    elfFile, err := elf.NewFile(file)39    if err != nil {40    }41    textSection := elfFile.Section(".text")42    if textSection == nil {43        return nil, fmt.Errorf("file does not contain a .text section")44    }45    text := make([]byte, textSection.Size)46    _, err = textSection.Read(text)47    if err != nil {48    }

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