Re:return values
Re:return values
Problem creating a new system call
system call returns "Bad Address". Why?
I created the following call it is working fine, but i don't know about that bad address.
sys call function looks like this.
int sys_print_data(char *s1,char *s2,int flag,int size1,int size2)
{
/* size1 and size2 are strlen of s1 and s2 respectively */
if (flag) {
sys_write(1,s1,size1);
return 1;
else {
sys_write(1,s2,size2);
return 2;
}
}
This is working fine. But i have another problem. I wrote a function int string_len(char *s), which will return the
length of the string as follows.
int string_length(char *s)
{
int len=0;
while(*(s+len))
len++;
return len;
}
i am calling this in the sys_print_data instead of passing size1 and size2. Exactly at this call it is saying
segmentation fault and dumping all the registers.
i also used the standard strlen call(linux/string.h).
It is also doing the same.
Can any body please clarify this.
Thanx in advance,
Gopinath
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