I have read it , but aslo couldn't understand. I didn't found where the trap return path use the l0/l1 register, in which file? I am just a newbie. SOrry for troubling you! Thanks! --- Best regards Bo Liu > Date: Tue, 9 Dec 2008 19:06:22 -0800 > To: bo-liu@xxxxxxxxxxx > CC: sparclinux@xxxxxxxxxxxxxxx > Subject: Re: Why need to load %%l0 register during switch_to macro > From: davem@xxxxxxxxxxxxx > > From: Bob > Date: Wed, 10 Dec 2008 10:37:36 +0800 > >> I have another question about switch_to macro. >> >> Why need to load %%l0 register during switch_to macro? >> >> "ldd [%%sp+0x00], %%l0" >> >> I think load %%i6 is enough. > > Read the comment about the switch_to() macro, it explains > this. I don't see how you could miss it. > > The trap return path for newly forked child tasks depend upon these > specific registers being setup a certain way. _________________________________________________________________ Invite your mail contacts to join your friends list with Windows Live Spaces. It's easy! http://spaces.live.com/spacesapi.aspx?wx_action=create&wx_url=/friends.aspx&mkt=en-us -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
