RE: pread() and pwrite() system calls

On Tue, 2012-05-29 at 09:28 +0100, David Laight wrote:

quoted

quoted

A special pread/pwrite asm stub that just copies
r7 to r0 could be used.

Would it be enough to do:
syscall_pread_pwrite:
	mov 0,7
	sc
	blr
and handle the -ve -> errno in C?

Huh? Won't fly, r0 is used for the system call number!

I was copying that from r7!

Using the non-existant 'mov' instruction!

or 0,7,7

is much clearer :)

cheers