[Clfs-support] Binaries from CLFS toolchain do not execute in Linux.

[Brian Szmyd]

Hey all,

I just finished building a toolchain from the PowerPC 32 book. I followed it almost exactly, except I substituted Binutils 2.19 so I wouldn't need the branch update patch.

Anyways, everything came out nice and clean and I was able to compile u-boot, Linux and all my userspace applications with it. Both u-boot and the kernel are running fine, but nothing within userspace is working at all, it's really strange. I loaded a root filesystem with busybox and glibc 2.3.6 which I had built from a previous cross compiler and it is working with the kernel built from the clfs toolchain. when I try and drop a binary built from clfs (like libc-2.7.so or just a simple 'hello world') on this filesystem i get "not found" as an error from the shell:

root: # ls -l
-rwxr-xr-x    1 root     root        10406 Nov 24 02:20 hello
root: # ./hello 
-ash: ./hello: not found
root: # strace ./hello 
execve("./hello", ["./hello"], [/* 16 vars */]) = -1 ENOENT (No such file or directory)
dup(2)                                  = 3
fcntl64(3, F_GETFL)                     = 0x2 (flags O_RDWR)
fstat64(3, {st_mode=S_IFCHR|0600, st_rdev=makedev(4, 71), ...}) = 0
ioctl(3, TCGETS, {B115200 opost isig icanon echo ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x48017000
_llseek(3, 0, 0xbfa2ca38, SEEK_CUR)     = -1 ESPIPE (Illegal seek)
write(3, "strace: exec: No such file or dir"..., 40strace: exec: No such file or directory
) = 40
close(3)                                = 0
munmap(0x48017000, 4096)                = 0
exit_group(1)                           = ?

I'm completely lost...I don't get the ENOENT error from execve at all. If I try to load an executable built for the wrong architecture (like x86) I at least get a meaningful ENOEXEC return value. Anyone seen anything like this?

Also, on a second note, is there any need for pulling and building the ports addon to glibc if I'm on a PPC405 or PPC440 without an fpu? The guide makes no mention of this or any other flags that might be used for gcc.

-thanks!

Brian Szmyd | Software Engineer | Quantum Corporation | Office: 720.249.5827 | Mobile: 303.601.0300 | brian.szmyd at quantum.com


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