Date: Mon, 23 Jun 2014 11:14:23 +0400 From: Stepan Dyatkovskiy <stpworld@ya.ru> To: Ian Lepore <ian@freebsd.org>, Aleksandr Rybalko <ray@ddteam.net> Cc: "freebsd-arm@FreeBSD.org" <freebsd-arm@freebsd.org> Subject: Re: locore.S and debugging initial stages of kernel Message-ID: <188111403507663@web5j.yandex.ru> In-Reply-To: <1403308620.20883.288.camel@revolution.hippie.lan> References: <53A3619C.3020505@narod.ru> <776BC360-5D2F-435C-B2B0-38449D4AB56D@bsdimp.com> <1403230772.20883.281.camel@revolution.hippie.lan> <BFE35132-0A10-40E4-835A-0F35D3084F09@FreeBSD.org> <0eac2533-d4bb-4bc6-9ba1-3dae40aa4360@email.android.com> <1403308620.20883.288.camel@revolution.hippie.lan>
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Thank you guys! Currently I have to stop my kernel survey. Though I've managed to updated cross-binutils and compile (and then launch) kernel with -mcpu=cortex-a9 option. Where I can read rules about, how to prepare and send patch to freebsd-arm community, so could share my experience? Thanks! -Stepan 21.06.2014, 03:57, "Ian Lepore" <ian@FreeBSD.org>: > On Sat, 2014-06-21 at 01:18 +0300, Aleksandr Rybalko wrote: >> šOn 20 ÞÅÒ×ÎÑ 2014 Ò. 08:23:01 GMT+03:00, Rui Paulo <rpaulo@FreeBSD.org> wrote: >>> On Jun 19, 2014, at 19:19, Ian Lepore <ian@FreeBSD.org> wrote: >>>> šI usually emit single chars by writing directly the console uart >>>> šregister. >>> I use exactly the same method, but your code looks much better. :-) >>> >>> -- >>> Rui Paulo >>> >>> _______________________________________________ >>> freebsd-arm@freebsd.org mailing list >>> http://lists.freebsd.org/mailman/listinfo/freebsd-arm >>> To unsubscribe, send any mail to "freebsd-arm-unsubscribe@freebsd.org" >> šIs not it would be better to just load txd address, instead of ORing 2-4 times? :-D >> šWBW >> š------ >> šAleksandr Rybalko <ray@ddteam.net> > > You mean store the value in memory somewhere, and then at runtime load a > pointer to where it's stored using only pc-relative instructions and > then loading the actual value using the pointer? šHarder to write, the > code added for "quick debugging" would be more scattered, and it's > actually slower (not that performance really matters here). šIt could be > done as a 1-liner using "=VALUE" syntax, but chances are that turns into > mov,orr,orr. :) > > -- Ian > > _______________________________________________ > freebsd-arm@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-arm > To unsubscribe, send any mail to "freebsd-arm-unsubscribe@freebsd.org"
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