On Wed, Jul 23, 2003 at 02:48:41PM -0700, Julian Elischer wrote: +> I'd like to have a "suptr and fuptr" to be able to save and read +> user pointers in a "machine independent" manner.. +> at the moment ia need to know the size of a pointer and select the +> appropriate 32 or 64 version.. It would jus tbe another ENTRY files in +> support.[sS] alongside teh appropriate sized entry +> for each architecture so it wouldn't 'cost' anything.. +> +> for i386 it would be an alternate name for fuword32() and suword32() +> I'm not sure what it would be on other architectures.... +> +> comments?
Yes, good idea. I'm using for now something like this:
static __inline void *
fuptr(void *uaddr)
{
void *ptr;
if (copyin(uaddr, &ptr, sizeof(void *)) != 0)
return ((void *)-1);
return (ptr);
}
For numbers is always better to use copyin(9)/copyout(9). Functions
like fubyte(9), etc. make no sens for me. -1 is returned on error or
if there is really -1, so one isn't able to find out if there is an
error or not.
--
Pawel Jakub Dawidek [EMAIL PROTECTED]
UNIX Systems Programmer/Administrator http://garage.freebsd.pl
Am I Evil? Yes, I Am! http://cerber.sourceforge.net
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