Re: linux plaform programming question
- Posted by jacques_desch May 24, 2009
- 943 views
sorry for the bad formatting, here again
constant errno=define_c_var(libc,"errno")
? errno
3086640776
This seem a valid value but safe.e report an error each time I use peek4s(errno)
How should I access errno ?
Jacques
Does it work if you use machine.e instead of safe.e? If so, you probably can just do a register_block(errno, 4).
I do feel that it is important to point out that some versions of glibc do not define errno at all, instead to be thread-safe errno is a C preprocessor macro that ends up calling an internal function that gets a per-thread address that is used to store the errno value.
However, if the define_c_var() call gives you a valid address for the "errno" variable, then you probably do not have to worry about this.
Yes register_blok(errno,4) solved the issue.
Thanks Jim
