Am 22.11.2011 17:21, schrieb Denys Vlasenko:
On Tue, Nov 15, 2011 at 11:04 AM, Peter Kuennemann@itb
<[email protected]> wrote:
Hi all,
I got completely stuck with a coreoverlay problem using busybox httpd
on a uClinux coldfire system (LANTRONIX XportPro). This a NOMMU box
What is "coreoverlay problem"?
From the obvious appearences of the modified first byte of the high
order byte of
the executeable name I supposed a storage overlay (coreoverly) problem.
I am running busybox v1.19.3 but the very same problem appeared as with
1.13.3
The problem manifests in a overlay of the command name in the task list (ps)
after having executed a cgi-script the first time. The first char of the command
line get overlayed by 0xE8.
This is the result of re_exec status passed in a high-order bit of
executable name.
Here's the code in main() which checks for it:
#if !BB_MMU
/* NOMMU re-exec trick sets high-order bit in first byte of name */
if (argv[0][0]& 0x80) {
re_execed = 1;
argv[0][0]&= 0x7f;
}
#endif
I am surprised the last line, "argv[0][0]&= 0x7f", does not fix the ps output.
Hmm. Found it.
Fixed in commit d2277e262ff7dd2dd946ea16b93462f3dcdf0447.
I also get 'memory allocation failed' after executing a CGI program a number
of times.
Where allocation fails? in httpd? How much memory there is in general?
How fragmented is it? (You can find some answers in /proc/..)
I am sorry but I was unable to diagnose the memory alloaction any
further. The Lantronix
device has 8 Meg of RAM. A free command shows about 1.2 to .1.8 Meg free
but sometimes
during or after several times executing the CGI I got 0 bytes free. I
cannot preclude that the
CGI program might have caused the memory problems.
The test script beeing executed is:
--------------------------- CGI Script -----------------------------
#!/bin/sh
echo "Content-type: text/html"
echo ""
cat /usr/local/nero/www/cgi-bin/f1
cat<<EOM
Some extra Text to test cat here
----------- End of extra text --------------
EOM
env
cat /usr/local/nero/www/cgi-bin/f2
---------------------END CGI Script -----------------------------
Any help woud be very much appreciated,
Regards, Peter
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