Loading ELF file failed

[Rlyown]

Description of the problem

I'm trying to run apache httpd with gramine-sgx, which is compiled from source. The compiled components include apr, apr-util, httpd, php. But apachectl doesn't execute successfully, and the debug info shows debug: loading ELF file failed: ELF file with invalid header.

Steps to reproduce

1. change configure prefix to same subdirectory, and compile apr, apr-util, httpd, php
2. update apachectl path and library path in manifest.template
3. Run gramine-sgx apachectl -k start

Expected results

Php web page can be accessed normally.

Actual results

warning: DkVirtualMemoryProtect is unimplemented in Linux-SGX PAL
[ :: ] debug: Gramine was built from commit: 1.2
[ :: ]debug: Host: Linux-SGX
[ :: ]debug: Lib0S save_enabled 1, xsave_size 0x340 (832), xsave_features 0x7
[ :: ]debug: Initial VMA region 0xfcee0000-0xfcf7f000 (LibS) bookkeeped
[ :: ]debug: Initial VMA region 0xff85e000-0x100000000 (manifest) bookkeeped
[ :: ]debug: ASLR top address adjusted to 0x775bf000
[ :: ]debug: host is Linux-SGX, adding SGX-specific /dev/attestation files: report, quote, etc.
[ :: ]debug: Shim loaded at 0xfcee0000, ready to initialize
[ :: ]debug: mounting "file:." (chroot) under /
[ :: ]debug: mounting"proc" (pseudo) under /proc
[ :: ]debug: mounting "dev" (pseudo) under /dev
[ :: ]debug: mounting "dev:tty" (chroot) under /dev/tty
[ :: ]debug: mounting "sys" (pseudo) under /sys 
[ :: ]debug: Creating pipe: pipe.srv:88651f24a205bfa773d582818563a723a125120031861b7d483d404a4b0c7ae5
[P1: T1:] debug: mounting "file:/usr/lib/x86_64-Linux-gnu/gramine/runtime/glibc"(chroot)under/lib
[P1: T1:] debug: mounting "file: /Lib/x86_64-Linux-gnu" (chroot) under /lib/x86_64-Linux-gnu
[P1: T1:] debug: mounting "file: /usr" (chroot) under /usr
[P1:T1:] debug: mounting "file: /home/sspku/Desktop/some_test/TEST/packages/httpd-2.4.54" (chroot) under /home/sspku/Desktop/some test/TEST/packages/httod-2.4.54
[P1: T1: apachectl] debug: Creating pipe: pipe.srv:c1f09e209d4654d05da69d31699d5f8dd0ede7c8dd31197fef09613de427d518
[P1: T1: apachectl] debug: Allocating stack at O (size = 262144)
[P1:T1: apachect] debug: loading "file:/home/sspku/Desktop/some_test/TEST/packages/httpd-2.4.54/install/bin/apachectl"
[P1: T1: apachectl] debug: loading ELF file failed: ELF file with invalid header
[P1:T1: apachectl] error: Error during shim_init() in init_elf_objects (-8)
debug: DkProcessExit: Returning exit code 8

Gramine commit hash

fd2e302

[mkow]

Quoting our issue template: @@@ PLEASE ENSURE THAT THE ISSUE REPRODUCES ON THE CURRENT MASTER BRANCH @@@. The commit you tested is quite old.
You may also want to try #722.

[boryspoplawski]

apachectl seems to be a shell script. #722 add support for running these directly as entrypoint. For now as a workaround you can change your entrypoint to be /bin/sh and pass the script as an argument.

[Rlyown]

Thanks, I didn't realize that apachectl is a shell script, not a binary program. After setting /bin/sh as the entrypoint httpd successfully executed.