Getting `Exec format error` when trying to patch MuJoCo binaries with patchelf-CodePudding

I'm trying to patch the MuJoCo binaries using patchelf.

I've ran patchelf --set-interpreter $(cat $NIX_CC/nix-support/dynamic-linker) ./bin/basic. And running patchelf --print-interpreter bin/basic gives me /nix/store/33idnvrkvfgd5lsx2pwgwwi955adl6sk-glibc-2.31/lib/ld-linux-x86-64.so.2.

Now, if I run ./bin/basic I get the output: bash: ./bin/basic: cannot execute binary file: Exec format error

Running ldd ./bin/basic gives me: not a dynamic executable, which I thought was strange.

Running file ./bin/basic yields:

./bin/basic: ELF 64-bit LSB executable, ARM aarch64, version 1 (SYSV), dynamically linked, interpreter /nix/store/33idnvrkvfgd5lsx2pwgwwi955adl6sk-glibc-2.31/lib/ld-linux-x86-64.so.2, for GNU/Linux 3.7.0, not stripped

This looks alright to me. I thought there might be something wrong with the header so I tried readelf -h bin/basic, this gives me:

ELF Header:
  Magic:   7f 45 4c 46 02 01 01 00 00 00 00 00 00 00 00 00 
  Class:                             ELF64
  Data:                              2's complement, little endian
  Version:                           1 (current)
  OS/ABI:                            UNIX - System V
  ABI Version:                       0
  Type:                              EXEC (Executable file)
  Machine:                           AArch64
  Version:                           0x1
  Entry point address:               0x232f70
  Start of program headers:          64 (bytes into file)
  Start of section headers:          293584 (bytes into file)
  Flags:                             0x0
  Size of this header:               64 (bytes)
  Size of program headers:           56 (bytes)
  Number of program headers:         12
  Size of section headers:           64 (bytes)
  Number of section headers:         28
  Section header string table index: 26

So this is what I've got so far:

file and readelf -h both think it's a dynamically linked executable
Trying to run it fails
ldd Thinks it's not a dynamically linked executable

Does anyone have an idea what could be the issue here?

I suspect that there is something invalid about the elf file which file and readelf is not picking up on.

Is there a tool I can use to search for such issues with an elf file?

CodePudding user response：

Looks like you're trying to use an AArch64 binary on an x86_64 system.