On 12-Dec-2002 Matthew Dillon wrote: >:> function A calls function B which uses ecx as a loop index. The bad part is >function B never >:> saves/restores the value of ecx and function A starts dereferencing garbage. >:> >:> An informal sampling of my driver seems to indicate that ebx gets >:> pushed/poped at entry/exit but ecx and edx don't. Does any of this >:> sound familiar? Thanks! >: >:Yes, eax, ebx, and edx are not "call-safe" registers. If you are writing >:your own function in assembly and you call a function you need to either >:save those registers yourself or reload their values. If you are writing >:... >:John Baldwin <[EMAIL PROTECTED]> <>< http://www.FreeBSD.org/~jhb/ >:"Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ > > I think you meant ecx there. eax, ecx, and edx are not call safe. > ebx is.
Yep. -- John Baldwin <[EMAIL PROTECTED]> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
