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I'm doing some work in head.S and entry.S, and I just wanted to make sure that I had the conventions down. According to the docs I read, r0 and r3-12 are caller-saves. They seem to be saved in EXCEPTION_PROLOG_2 (head.S) and restored in ret_from_except() (entry.S). Thus, if I add code in entry.S I should be able to use any of those registers, without having to worry about restoring them myself--correct? Also, I'm a bit confused about the three instances of the following line in entry.S: stwcx. r0,0,r1 /* to clear the reservation */ I don't see the corresponding lwarx instruction. What reservation is it referring to? Thanks, Chris - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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