public inbox for linuxppc-dev@ozlabs.org 
 help / color / mirror / Atom feed

From: Prakash kanthi <pkanthi@yahoo•com>
To: "PPC-Linux list (E-mail)" <linuxppc-embedded@lists•linuxppc.org>
Subject: Linux Kernel hangs after execve("/bin/sh")
Date: Wed, 22 Jan 2003 01:15:32 -0800 (PST)	[thread overview]
Message-ID: <20030122091532.1705.qmail@web41202.mail.yahoo.com> (raw)
In-Reply-To: <20030122055708.ED27DC608E@atlas.denx.de>


Hi FOlks,

I finally reached the last step (hopefully) of linux
kernel booting process. Kernel gets stuck after doing
a 'execve("/bin/sh")'. I tried using different
ramdisks, still no difference.

I added few printk's in the source, following the
function call path from 'execve' call. Following is
the output. You can see that, execve goes through
without any file permission problems and subsequently
it tries to open /lib/ld.so.1 flawlessly. After that i
see nothing on the terminal.

---------
init:Trying to bring /bin/sh up.
do_execve:enter for /bin/sh
open_exec:enter for /bin/sh.
open_exec:Permission error=0.
dentry_open:enter.
dentry_open: after file->f_op->open. 0
open_exec:enter for /lib/ld.so.1.
open_exec:Permission error=0.
dentry_open:enter.
dentry_open: after file->f_op->open. 0
do_execve: after search_binary_handler. retval=0
-----------


I wrote a small standalone program hello.c to test, if
i can dynamically load it from init() instead of
loading /bin/sh. I compiled the program added it to my
ramdisk and called from init(). Following is the
output. You can see that, it did all of it that it did
for /bin/sh and also tried to open /etc/ld.so.preload
and /etc/ld.so.cache and failed. But again towards the
end, it tries to open /lib/libc.so.6 and succeds but
still no output is displayed that hello.c is trying to
print.

---------
init:Trying to bring /bin/hello up.
do_execve:enter for /bin/hello
open_exec:enter for /bin/hello.
open_exec:Permission error=0.
dentry_open:enter.
dentry_open: after file->f_op->open. 0
open_exec:enter for /lib/ld.so.1.
open_exec:Permission error=0.
dentry_open:enter.
dentry_open: after file->f_op->open. 0
do_execve: after search_binary_handler. retval=0
sys_open:enter for /etc/ld.so.preload.
sys_open:unused_fd=3.
filp_open:enter for /etc/ld.so.preload.
filp_open:open_namei error -2.
sys_open:enter for /etc/ld.so.cache.
sys_open:unused_fd=3.
filp_open:enter for /etc/ld.so.cache.
filp_open:open_namei error -2.
sys_open:enter for /lib/libc.so.6.
sys_open:unused_fd=3.
filp_open:enter for /lib/libc.so.6.
filp_open:open_namei error 0.
dentry_open:enter.
dentry_open: after file->f_op->open. 0
-----------

Can someone please throw some light on this?

Thanks,
Prakash


** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/

next prev parent reply	other threads:[~2003-01-22  9:15 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20030116083034.26873.qmail@web41206.mail.yahoo.com>
2003-01-22  0:05 ` busybox source Prakash kanthi
2003-01-22  0:29   ` HyunKook Kim
2003-01-22  5:57   ` Wolfgang Denk
2003-01-22  9:15     ` Prakash kanthi [this message]
2003-01-22  9:47       ` Linux Kernel hangs after execve("/bin/sh") Chirag Kantharia
2003-01-22 15:22       ` Linux Kernel hangs after execve('/bin/sh') Daris A Nevil
2003-01-22 19:50         ` Prakash kanthi
2003-01-22 20:14           ` Mark Pilon
2003-01-24  6:44       ` Linux Kernel hangs after execve("/bin/sh") Jan Damborsky
2003-01-24  7:03         ` Prakash kanthi
2003-01-22 20:35 Linux Kernel hangs after execve('/bin/sh') Jean-Denis Boyer

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20030122091532.1705.qmail@web41202.mail.yahoo.com \
    --to=pkanthi@yahoo$(echo .)com \
    --cc=linuxppc-embedded@lists$(echo .)linuxppc.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox