> In my userland code, I change new system call
> our_sys_open("mytest", O_RDONLY, 0444); into
> #include <unistd.h>
> ...
> _syscall3(errno, "our_sys_open", name, "mytest", filename, O_RDONLY,
> flags, 0444);
> ...
this is how the macro will look like
_syscall3(type,name,type1,arg1,type2,arg2,type3,arg3);
type - return type(int,long etc)
name - function name (in ur case our_sys_open not "our_sys_open")
type 1 - type of 1st argument (int, struct something *,etc)
arg1 - first argument of ur system call.(in ur case mytest not "mytest")
type 2 - same like above
arg2 - "
type 3 - "
arg 3 - "
refer asm/unistd.h for the macro.
the statement should like
_syscall3(int,our_sys_open,<data type of mytest>,mytest,<data
type>,O_RDONLY,<data type>,0444);
dont use any double quotes like "our_sys_call" that is our_sys_call
and "mytest" should be simply mytest
> the compilation still gives me error: undefined reference to `_syscall3'
>
> I guess there is something I am still missing,
> -Hong
dont forget to include asm/unistd.h
if u still have trouble i will send u some code.because putting the whole
code here will waste everyone's disk space.i have done similar kinda work.
regards,
mohan.
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