init does not run on 405GP system
Hi,
I'm currently porting u-boot and Linux to an IBM 405GP based board. The problem is now that init seems not to be running and does not give any output. Up to that point where init should make some noise the kernel boots smoothly (serial console), I see all output and NFS-Root is mounted via an Intel 82559 network chip. The kernel threads are also running, I see kupdated & friends being put into the run queue from time to time.
I have replaced /sbin/init by a statically linked "hello world" (which also does not give any output). My impression is that the binary code of the init ELF binary is never run. When I switch on the SHOW_SYSCALLs macro in arch/ppc/kernel/entry.S I see the system calls for open(), dup(), dup() and execve() which come from init/main.c. Opening the console works, execve() to /sbin/init as well. When I follow the path of execution up to load_elf_binary() in fs/binfmt_elf.c I can even see the correct code being load and pointed to by elf_entry in that file. But there is never any output from init, nor does something happen when I replace init by a piece of code which should immediately make a zero pointer exception.
Nevertheless, the kernel runs smoothly. I can ping the machine, I can even floodping it with 0% packet loss. Only that there is no userspace running.
Has anybody seen something like this before?
- Kernel is 2.4.21-rc2 with bitkeeper from 20030515 plus board port
- userland was tested with Debian bootdisks, Denx 4xx boot image and others
- toolchain is the Debian powerpc-linux cross toolchain.
Robert
--
Dipl.-Ing. Robert Schwebel | http://www.pengutronix.de
Pengutronix - Linux Solutions for Science and Industry
Braunschweiger Str. 79, 31134 Hildesheim, Germany
Handelsregister: Amtsgericht Hildesheim, HRA 2686
Phone: +49-5121-28619-0 | Fax: +49-5121-28619-4
Quoted 22 lines · Robert Schwebel
Hi,
I'm currently porting u-boot and Linux to an IBM 405GP based board. The problem is now that init seems not to be running and does not give any output. Up to that point where init should make some noise the kernel boots smoothly (serial console), I see all output and NFS-Root is mounted via an Intel 82559 network chip. The kernel threads are also running, I see kupdated & friends being put into the run queue from time to time.
I have replaced
/sbin/initby a statically linked "hello world" (which also does not give any output). My impression is that the binary code of the init ELF binary is never run. When I switch on theSHOW_SYSCALLsmacro inarch/ppc/kernel/entry.SI see the system calls foropen(),dup(),dup()andexecve()which come frominit/main.c. Opening the console works,execve()to/sbin/initas well. When I follow the path of execution up toload_elf_binary()infs/binfmt_elf.cI can even see the correct code being load and pointed to byelf_entryin that file. But there is never any output from init, nor does something happen when I replace init by a piece of code which should immediately make a zero pointer exception.
Quoted 5 lines
Nevertheless, the kernel runs smoothly. I can ping the machine, I can even floodping it with 0% packet loss. Only that there is no userspace running.
Has anybody seen something like this before?
Yes.
I once tried to run 686 based libc on a 486, init was rained upon by SIGILLs 'coz it had 586+ instructions. No output on the screen whatsoever.
--
vda
Quoted 3 lines · Denis Vlasenko
I once tried to run 686 based libc on a 486, init was rained upon by SIGILLs 'coz it had 586+ instructions. No output on the screen whatsoever.
I've tried it with the DENX busybox rootimage which is definitely tested extensively on PPC4xx, but it does not work.
Robert
Signature · 5 lines
Dipl.-Ing. Robert Schwebel | http://www.pengutronix.de
Pengutronix - Linux Solutions for Science and Industry
Braunschweiger Str. 79, 31134 Hildesheim, Germany
Handelsregister: Amtsgericht Hildesheim, HRA 2686
Phone: +49-5121-28619-0 | Fax: +49-5121-28619-4