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main.go
105 lines (97 loc) · 2.41 KB
/
main.go
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package main
import "os"
import "flag"
import "fmt"
import "strings"
import "debug/elf"
import "syscall"
//import "debug/dwarf"
func dump_dynstr(file *elf.File) {
fmt.Printf("DynStrings:\n")
dynstrs, _ := file.DynString(elf.DT_NEEDED)
for _, e := range dynstrs {
fmt.Printf("\t%s\n", e)
}
dynstrs, _ = file.DynString(elf.DT_SONAME)
for _, e := range dynstrs {
fmt.Printf("\t%s\n", e)
}
dynstrs, _ = file.DynString(elf.DT_RPATH)
for _, e := range dynstrs {
fmt.Printf("\t%s\n", e)
}
dynstrs, _ = file.DynString(elf.DT_RUNPATH)
for _, e := range dynstrs {
fmt.Printf("\t%s\n", e)
}
}
func dump_symbols(file *elf.File) {
fmt.Printf("Symbols:\n")
symbols, _ := file.Symbols()
for _, e := range symbols {
if !strings.EqualFold(e.Name, "") {
fmt.Printf("\t%s\n", e.Name)
}
}
}
func dump_elf(filename string) int {
file, err := elf.Open(filename)
if err != nil {
fmt.Printf("Couldn’t open file : \"%s\" as an ELF.\n")
return 2
}
dump_dynstr(file)
dump_symbols(file)
return 0
}
func init_debug(filename string) int {
attr := &os.ProcAttr{ Sys: &syscall.SysProcAttr{ Ptrace: true } }
if proc, err := os.StartProcess(filename, []string { "/" }, attr); err == nil {
proc.Wait()
foo := syscall.PtraceAttach(proc.Pid)
fmt.Printf("Started New Process: %v.\n", proc.Pid)
fmt.Printf("PtraceAttach res: %v.\n", foo)
return 0
}
return 2;
}
func main() {
if len(os.Args) > 1 {
filename := flag.String("filename", "", "A binary ELF file.")
action := flag.String("action", "", "Action to make: {dump|debug}.")
flag.Parse()
if *filename == "" || *action == "" {
goto Usage
}
file, err := os.Stat(*filename)
if os.IsNotExist(err) {
fmt.Printf("No such file or directory: %s.\n", *filename)
goto Error
} else if mode := file.Mode(); mode.IsDir() {
fmt.Printf("Parameter must be a file, not a " +
"directory.\n")
goto Error
}
f, err := os.Open(*filename)
if err != nil {
fmt.Printf("Couldn’t open file: \"%s\".\n", *filename)
goto Error
}
f.Close()
fmt.Printf("Tracing program : \"%s\".\n", *filename)
fmt.Printf("Action : \"%s\".\n", *action)
switch *action {
case "debug": os.Exit(init_debug(*filename))
case "dump": os.Exit(dump_elf(*filename))
}
} else {
goto Usage
}
Usage:
fmt.Printf("Usage of ./main:\n" +
" -action=\"{dump|debug}\": Action to make.\n" +
" -filename=\"file\": A binary ELF file.\n")
goto Error
Error:
os.Exit(2)
}