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flat assembler > Linux > segmentation fault when calling mysql (in both fasm and c)

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skingston



Joined: 11 Dec 2004
Posts: 19
Hi,
Has anyone here tried using mysql with either mysql or c in linux?

I created a simple program that prints out a couple of messages and tries to call the function mysql_init(). I eventually worked out how to compile and link them, but when I run the program, the mysql_init function causes a segmentation fault. Does any one know what mite be causing this?

This is the asm code with the problem:
mov eax,4
mov ebx,1
mov ecx,msg
mov edx,msg_size
int 0x80

mycall mysql_init ; (this is the same as call mysql_init)

mov eax,4
mov ebx,1
mov ecx,msg
mov edx,msg_size
int 0x80
....

I compiled the program like this:
fasm mysql.asm mysql.o
CFG=/usr/lib/mysql/mysql_config
sh -c "gcc -o mysql mysql.o `$CFG --libs`"

I get this output:
Hello World!
Segmentation fault

The c program does the same thing. Can anyone help?
Post 30 Mar 2005, 04:30
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Endre



Joined: 29 Dec 2003
Posts: 212
Location: Budapest, Hungary
Could we see the entire source if it's not confidental? Or check out the examples delivered with fasm (I mean elfexe, elfobj, libcdemo) - they may help.
Post 30 Mar 2005, 09:56
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skingston



Joined: 11 Dec 2004
Posts: 19
I can show you the entire source if you wish.

However, I have discovered the problem. The mysql_init function takes a null parameter.

It is now working without any problems.
Post 30 Mar 2005, 22:47
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Endre



Joined: 29 Dec 2003
Posts: 212
Location: Budapest, Hungary
skingston wrote:
I have discovered the problem. The mysql_init function takes a null parameter.

It is now working without any problems.

Excellent. Next if you had any problem just throw a post on the forum, you see how it solved your problem. We all already know that this is a magic forum. You've now experienced it, too Smile.
Post 31 Mar 2005, 08:41
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skingston



Joined: 11 Dec 2004
Posts: 19
Yes it is.
I think i'll have to write all of my programs into the forum from now on so I don't make any more stupid mistakes Smile
Post 31 Mar 2005, 10:00
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