When I run one of my user's applications named "myfile".
$ ./myfile
I receive the following output
bash: ./myfile: cannot execute binary file
My user expects the binary file to run. I assume this is a compilation error but am unable to confirm it. I ran the file command
$ file myfile
myfile: ELF 64-bit LSB relocatable, x86-64, version 1 (SYSV), not stripped
My RHEL6 OS is 64-bit
$ uname -p -o
x86_64 GNU/Linux
So it looks to me like it was complied for the right architecture. I don't understand what "relocatable" means in the file command's output and was not able to get an explanation form the man pages.
For good measure I checked for Shared Library Dependencies
$ ldd myfile
not a dynamic executable
Is there any way I can get this file to run or give my user some constructive information about why it won't run (such as he needs to recompile using x)?
Strace
$ strace ./myfile
execve("./myfile", ["./myfile"], [/* 22 vars */]) = -1 ENOEXEC (Exec format error)
dup(2) = 3
fcntl(3, F_GETFL) = 0x8002 (flags O_RDWR|O_LARGEFILE)
fstat(3, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0), ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7a9fc93000
lseek(3, 0, SEEK_CUR) = -1 ESPIPE (Illegal seek)
write(3, "strace: exec: Exec format error\n", 32strace: exec: Exec format error
) = 32
close(3) = 0
munmap(0x7f7a9fc93000, 4096) = 0
exit_group(1) = ?
readelf output
readelf -S ./myfile There are 13 section headers, starting at offset 0x1e8:
Section Headers:
[Nr] Name Type Address Offset
Size EntSize Flags Link Info Align
[ 0] NULL 0000000000000000 00000000
0000000000000000 0000000000000000 0 0 0
[ 1] .text PROGBITS 0000000000000000 00000040
0000000000000098 0000000000000000 AX 0 0 4
[ 2] .rela.text RELA 0000000000000000 000006e0
0000000000000120 0000000000000018 11 1 8
[ 3] .data PROGBITS 0000000000000000 000000d8
0000000000000010 0000000000000000 WA 0 0 4
[ 4] .bss NOBITS 0000000000000000 000000e8
0000000000000000 0000000000000000 WA 0 0 4
[ 5] .rodata PROGBITS 0000000000000000 000000e8
0000000000000033 0000000000000000 A 0 0 1
[ 6] .comment PROGBITS 0000000000000000 0000011b
000000000000002d 0000000000000001 MS 0 0 1
[ 7] .note.GNU-stack PROGBITS 0000000000000000 00000148
0000000000000000 0000000000000000 0 0 1
[ 8] .eh_frame PROGBITS 0000000000000000 00000148
0000000000000038 0000000000000000 A 0 0 8
[ 9] .rela.eh_frame RELA 0000000000000000 00000800
0000000000000018 0000000000000018 11 8 8
[10] .shstrtab STRTAB 0000000000000000 00000180
0000000000000061 0000000000000000 0 0 1
[11] .symtab SYMTAB 0000000000000000 00000528
0000000000000180 0000000000000018 12 9 8
[12] .strtab STRTAB 0000000000000000 000006a8
0000000000000037 0000000000000000 0 0 1
Key to Flags:
W (write), A (alloc), X (execute), M (merge), S (strings)
I (info), L (link order), G (group), x (unknown)
O (extra OS processing required) o (OS specific), p (processor specific)