#rockbox 2020-11-11

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#rockbox log for 2020-11-11

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04:05:43	braewoods	ok... bootloader flash checks out for new iriver_flash on h120
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05:05:35	braewoods	... ok done
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06:07:22	braewoods	whoever feels like reviewing, i have finished my revisions to iriver_flash. only thing i plan to do later is add H300 bootloaders once those are ready.
06:07:29	braewoods	https://gerrit.rockbox.org/r/#/c/rockbox/+/2961
06:07:32	braewoods	err
06:07:34	braewoods	g#2961
06:07:36	fs-bluebot	Gerrit review #2961 at http://gerrit.rockbox.org/r/2961 : iriver_flash: refactor code to be easier to understand by James Buren
06:07:38	braewoods	still getting used to this
07:00
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08:45:06	braewoods	speachy: any advice for debugging bootloaders? i tried a test build and it doesn't boot. though it appears to be semi-functional as i was able to trigger emergency boot into the OF.
08:45:24	braewoods	all i get is a white screen
09:00
09:01:29	braewoods	hm.
09:02:33	braewoods	ok... restored the previous bootloader via OF
09:10:09	braewoods	well at least crt0.S appears to be working
09:10:23	braewoods	since it was able to boot OF
09:10:36	braewoods	nice little failsafe
09:15:31	*	braewoods ponders.
09:15:36	braewoods	i wonder if it's the toolchain
09:15:48	braewoods	one way to find out...
09:15:56	braewoods	build another h120 bootloader and see what happens
09:26:28	speachy	for low-level code like that? jtag and printf()s
09:27:42	braewoods	no access to JTAG i'm afraid...
09:28:33	braewoods	hm.
09:28:41	braewoods	one thing i'll try
09:28:55	braewoods	the H120 bootloader first i guess
09:30:17	braewoods	i guess i'll need to inspect the ASM and see what I find.
09:30:30	braewoods	but later
09:30:47	braewoods	speachy: did you review my iriver_flash commit?
09:31:29		Join massiveH [0] (~massiveH@ool-18e4e82f.dyn.optonline.net)
09:31:49	speachy	only at the most cursory level.
09:32:06	speachy	($dayjob demands most of my attention)
09:34:01	braewoods	speachy: ok. i'll wait some more.
09:45:18	braewoods	most interesting.
09:45:27	braewoods	H120 works perfectly with latest master
09:45:43	braewoods	so... something is up.
09:45:45	braewoods	but not sure what
09:48:11	braewoods	at least that gives me a giant lead
09:48:27	braewoods	probably means the toolchain is not at fault for coldfire as it produces a viable bootloader for H120
09:49:08	braewoods	it was working at one time so i'm going to dig through the common code and see what i can find
09:49:23	braewoods	but at least it seems the LCD and toolchain updates are unlikely candidates
09:50:26	speachy	so the one that fails is the H3xx?
09:51:32		Nick mendelmunkis is now known as mendel_munkis (~mendelmun@ool-435680b7.dyn.optonline.net)
09:51:56	mendel_munkis	is there any reason I'm missing that the quickscreen applies global settings?
09:53:18	braewoods	speachy: indeed.
09:53:39	braewoods	speachy: but it appears crt0 is functional as i was able to purposefully trip the emergency boot to OF
09:53:51	braewoods	it's possible the code has been non-functional for awhile
09:54:06	braewoods	i think something in the H100 code may give some ideas
09:54:12	braewoods	since it still works
10:00
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10:10:26	braewoods	hm.
10:22:06	_bilgus_	braewoods, first glance it looks very nice but so many changes I'm not sure i'll catch any real bugs without going thru several times
10:22:22	braewoods	_bilgus_: i've done so myself already.
10:22:30	braewoods	it works perfectly for H120 that i can tell
10:22:43	braewoods	i found one small bug i already fixed though
10:22:59	_bilgus_	yeah I dea is we get blind when reviewing our own stuff :p
10:23:39	braewoods	i'm trying to figure out why the H300 bootloader is a no-go
10:23:42	braewoods	though
10:23:46	braewoods	when built from master
10:23:52	braewoods	it flashes correctly that i can tell
10:24:00	braewoods	so something else is going on
10:24:27	braewoods	now that is odd
10:24:54	braewoods	is this normal?
10:24:56	braewoods	https://dpaste.com/DW87PDDL5
10:25:05	braewoods	3f3124: 51fa Address 0x00000000003f3126 is out of bounds.
10:25:07	braewoods	Address 0x00000000003f3126 is out of bounds.
10:25:15	braewoods	output from objdump -d
10:25:48	braewoods	i'll see what i get when building h120
10:26:34	braewoods	apparently it also occurs in the H120 bootloader elf
10:26:35	braewoods	hm.
10:26:37	braewoods	guess it is
10:38:56	fs-bluebot	Build Server message: New build round started. Revision 4aa749b, 293 builds, 8 clients.
10:41:13	braewoods	trying to disassemble this is tedious
10:41:43	braewoods	i wonder. can i make objdump output intermediates as hexadecimal?
10:41:55	braewoods	as it stands it is interpreting them as signed base 10 integers
10:42:12	braewoods	i mean, output immediate values
10:42:34	braewoods	it would help if i could do that so i wouldn't have to scratch my head when looking at some of these lines
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11:00
11:05:55	braewoods	i guess question 1 is how do I signal progression...
11:06:02	braewoods	hm
11:06:11	braewoods	from the real HW
11:06:13	braewoods	no less...
11:06:33	braewoods	if LCD isn't giving output...
11:06:44	braewoods	my only real fallback is shut down or so
11:13:12	braewoods	speachy: here's a random idea i had. is it possible the bootloader is just slow to startup?
11:13:27	braewoods	though i can't see why that would be the case
11:13:39	speachy	possible, but highly unlikely.
11:14:16	braewoods	i do know it is at least making it to line 181 of crt0.S
11:14:42	braewoods	and also setting the cookie
11:14:58	braewoods	probably makes it all the way through there
11:16:53	_bilgus_	well its already pushed but a few comments there, dereference of ** and releasing the audio buffer being the main things to look at
11:17:02	_bilgus_	@braewoods,
11:17:32	braewoods	_bilgus_: dereference of **?
11:18:05	_bilgus_	315
11:18:29	fs-bluebot	Build Server message: Build round completed after 1125 seconds.
11:18:33	fs-bluebot	Build Server message: Revision 869a8bf result: All green
11:18:56	_bilgus_	if fi == NULL then just below you deref &fi which is legal
11:19:27	_bilgus_	NULL is a valid memory address as long as thats your intention..
11:19:48	braewoods	it is. it signals that it hasn't been set yet. the called subroutine is guaranteed to set it to something valid
11:20:10	braewoods	it's a small optimization
11:20:20	braewoods	it only calls the info flash commands once per program run now
11:20:23	braewoods	the old one did it twice
11:20:39	braewoods	so it effectively is caching the result on the second use
11:21:00	_bilgus_	prefectly valid as long as you are prepared for it :)
11:21:23	braewoods	as for your question about why i removed the comments about the individual bytes...
11:21:43	braewoods	they didn't seem meaningful. the bytes have no symbolic meaning in the datasheet that i can tell.
11:22:13	_bilgus_	ok so superfluous then and therefore worse than no comment
11:22:28	braewoods	https://www.rockbox.org/wiki/pub/Main/DataSheets/SST_39VF160_Datasheet.pdf
11:22:32	braewoods	look at page...
11:22:48	braewoods	6
11:23:07	braewoods	the command sequence is just a series of writes to specific addresses
11:23:12	braewoods	special to the ROM in some way
11:23:24	braewoods	but why they were chosen isn't known to me
11:23:39	braewoods	so i couldn't see a good way to describe them
11:24:13	_bilgus_	yeah and just differenct sequences
11:24:14	braewoods	i guess it's the ROM equivalent to port knocking
11:24:28	_bilgus_	agreed
11:26:26	braewoods	i'm just stumped why the new bootloader for H300 failed to even print to the LCD
11:26:33	braewoods	hm
11:26:42	_bilgus_	last one the audiobuffer after failure if you want to be able to try again it needs to be released..
11:27:08	braewoods	indeed. but it's expected they'll just run it again.
11:27:19	braewoods	so it wouldn't matter given how it is setup
11:27:32	_bilgus_	its cleaned on plugin exit so not a big deal
11:28:29	_bilgus_	if you can't get it to display you might try a different tact like flipping the backlight on/off
11:28:59	_bilgus_	i've used that to signal when I couldn't get output
11:29:27	braewoods	how do i know it isn't hung or something?
11:29:46	_bilgus_	you make it loop flip backlight
11:30:12	_bilgus_	builtin did something similar with the ipod piezo
11:30:17	braewoods	i see.
11:30:26	braewoods	with the H300 though
11:30:35	braewoods	check iriver_h300.c
11:30:41	_bilgus_	thats why I said the backlight
11:30:47	braewoods	any idea where i might put it?
11:31:22	braewoods	I know at least part of crt0.S, the asm for the first entry point of the bootloader works
11:36:35	_bilgus_	line 187 has the bl init
11:37:24	_bilgus_	does the backlight turn on in your current bootloader?
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11:42:49	_bilgus_	for(int i = 0;i<3;i++){ backlight_hw_off(); for(int j = 0xFFFFFFF;j > 0;j−−); backlight_hw_on(); for(int j = 0xFFFFFFF;j > 0;j−−);}
11:42:54	_bilgus_	something like that
11:43:13	_bilgus_	then you can increase I to signal where it is
11:57:22	braewoods	_bilgus_: yes. white screen or so.
11:58:01	_bilgus_	so that will work just place a few so you can narrow down where it sticks
11:58:35	_bilgus_	not sure on the delay hopefully its enough to see the flashes
11:59:00	_bilgus_	stay away from sleep though
11:59:39	__builtin	you can also have it flash a binary pattern if you need an address or something
12:00
12:00:25	braewoods	_bilgus_: should i disable optimizations while doing this?
12:00:36	braewoods	i've known those to fuck up low level code before
12:00:41	__builtin	though it's not so easy with a binary backlight
12:01:42	_bilgus_	I'd have already disabled them lol
12:02:30	_bilgus_	at this point though doesn't matter we are just trying to narrow down the issue
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12:07:14	braewoods	ok. i think i will also make it do stuff with the remote i have
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12:10:34	braewoods	thank you unzip
12:10:37	braewoods	:P
12:19:44	braewoods	huh.
12:19:53	braewoods	_bilgus_: with that code... it stayed off all the time.
12:19:58	braewoods	dark screen.
12:20:00	braewoods	weird.
12:20:07	braewoods	hm
12:20:43	braewoods	i think i see why
12:22:35	braewoods	let's modify this so it starts on
12:50:23	braewoods	going back to regular code for now
12:50:29	braewoods	let's do some more investigating
12:55:48	braewoods	bizarre
12:55:53	braewoods	no reaction from the LCD
12:55:55	braewoods	err
12:55:57	braewoods	remote
12:59:47	_bilgus_	if you've tried right at the point of init and still no result probably means you are getting stuck earlier
13:00
13:00:44	braewoods	i'm not even sure the main function is executing
13:00:51	braewoods	hm
13:01:03	braewoods	i wonder if there's a GPIO i can use temporarily...
13:01:35	_bilgus_	yeah heartbeat
13:01:56	braewoods	heartbeat?
13:02:09	_bilgus_	signs of life
13:05:38	braewoods	there's an idea.
13:05:52	braewoods	i could do low level button reads
13:06:18	braewoods	turn off once power is released or something
13:06:37	braewoods	i have a way to rescue as it stadns
13:15:09	_bilgus_	some way to narrow down the area before we start looking at assembly
13:16:18	braewoods	i already have to a degree
13:16:24	_bilgus_	compiler explorer is very handy for checking btw
13:16:27	braewoods	question is, how far does it get and how can I tell?
13:16:53	braewoods	_bilgus_: all i know is it's at least able to execute the emergency cookie code to launch the OF
13:17:06	braewoods	so far anyway
13:17:28	braewoods	i can't tamper with that lest i risk destroying my recovery
13:17:30	_bilgus_	well you have something that you can signal then start moving that around
13:17:39	_bilgus_	oh
13:17:45	braewoods	yes, exactly...
13:17:56	braewoods	the OF booting is how i've recovered from unable to boot rockbox
13:18:11	braewoods	i reflash the old bootloader
13:18:42	braewoods	so i'm trying to find another option
13:19:10	braewoods	i know the LCD printing doesn't appear to be reachable
13:19:17	braewoods	it does work when i boot the regular firmware
13:19:23	_bilgus_	so move your power off code a bit deeper till it stops powering off
13:19:24	braewoods	so i would hazard it doesn't even reach it
13:19:58	braewoods	quick question though
13:20:02	braewoods	what does printf do in the bootloaders?
13:20:09	braewoods	is it a fancy wrapper to lcd_printf?
13:20:12	braewoods	or putsf
13:20:14	braewoods	or w/e
13:21:00	_bilgus_	uh I think it prints to a serial port
13:21:22	_bilgus_	unless there is a macro somewhere specific to that device
13:21:34	braewoods	printf for the H120 bootloader prints to the LCD
13:22:02	braewoods	i tested a master build of it to see and it actually works
13:22:06	braewoods	the H300 one isn't for some reason
13:22:13	_bilgus_	then it has something specific to it
13:22:36	braewoods	but hm
13:22:41	_bilgus_	in all the other bootloaders they rely on whats in the lcd driver
13:25:11	_bilgus_	its in common.c int printf(const char *format, ...)
13:25:41	_bilgus_	-> lcd_puts(0, line++, ptr);
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13:33:13	braewoods	_bilgus_: well, disabling optimizations is out of the question
13:33:18	braewoods	the bootloader ends up too big :>
13:33:59	_bilgus_	if you are that close then you might look at the bin sizes
13:34:45	_bilgus_	might be an alignment issue or even just not enough stack left for what you are trying to do
13:36:49	_bilgus_	also looking at the devices that do use that printf redirect the ones where space counts do it directly so the printf can be stripped
13:37:58	_bilgus_	unused switches although I recently changed that back to the old one so probably less of an issue
13:39:48	_bilgus_	thats another thought that 'new' printf is the original code (before the printf size explosion) optimized might try trading it out for the OG printf code just in case
13:40:07	braewoods	_bilgus_: how would I know the stack size?
13:40:16	_bilgus_	the map file
13:41:32	_bilgus_	it'll have a listing like .stack or *(.stack)
13:42:12	braewoods	0x2000 is the size it appears
13:42:26	braewoods	8K
13:42:36	_bilgus_	thats set up by your crt0 file so look at the address it has it placed
13:43:04	_bilgus_	should be aligned to 0x4 or 0x8 and take note of the address vs where you load the file
13:46:25	braewoods	... does this stack count up or down?
13:46:52	braewoods	oh i see
13:47:05	braewoods	it's writing 0xdeadbeef to the whole stack region
13:47:07	_bilgus_	no clue probably down but not familar with the processor
13:47:29	_bilgus_	that was my next suggestion.. check if you blew the stack
13:47:55	_bilgus_	only problem is how you'd signal that
13:53:26	_bilgus_	https://github.com/Rockbox/rockbox/blob/master/firmware/target/coldfire/iriver/boot.lds#L54
13:54:05	braewoods	?
13:55:16	_bilgus_	also this.. https://github.com/Rockbox/rockbox/blob/master/firmware/target/coldfire/crt0.S#L197
13:56:57	_bilgus_	first one verify thats the case in the map file
13:57:21	_bilgus_	it lays out where it places them make sure it jives with the map
13:57:43	_bilgus_	second one might mess up some assumptions about the addresses
13:58:20	braewoods	yet that's active on both H120 and H320 because they both have 32MB of RAM
13:59:11	braewoods	so i dunno
13:59:55	_bilgus_	a little further down is where it loads the image (if found)
14:00
14:01:00	_bilgus_	are you sure you get past that because id start looking very closely there if not
14:01:28	braewoods	all i know is it can reach the cookie code
14:01:30	braewoods	that's it
14:01:48	braewoods	how i would detect it from the crt0.S is beyond me...
14:02:46	braewoods	anyway i'll see what i can dig up
14:03:02	_bilgus_	i can jump in a bit more this evening
14:03:22	braewoods	_bilgus_: i just need to build a functional BL before I can expand on it
14:03:45	braewoods	makes me want to try something... build from 3.15 source or so
14:03:48	_bilgus_	oh this is from head then?
14:03:51	braewoods	yes
14:03:58	_bilgus_	ick
14:03:59	braewoods	i'm building from head
14:04:07	braewoods	the H120 bootloader works when built from current head
14:04:15	braewoods	but the H320
14:04:18	braewoods	no bueno so far
14:04:24	braewoods	excuse me, H300
14:04:29	_bilgus_	yeah this is going to turn into a bisect mess
14:04:52	braewoods	yea.. i have no point of reference.
14:05:04	_bilgus_	only option at this point is to find where it still works so right on
14:05:24	braewoods	i'll try building from 3.15
14:05:27	braewoods	toolchain and all
14:05:50		Quit Rower (Ping timeout: 260 seconds)
14:05:53	braewoods	H120 for whatever reason works fine
14:06:02	***	Saving seen data "./dancer.seen"
14:06:08	braewoods	i thought H300 would too since it's similar enough
14:07:02	braewoods	there is one major difference between H120 and H300 though that may play a role
14:07:13	braewoods	H300 has twice the ROM space which changes offsets
14:07:17	_bilgus_	clearly not though or there is something overlooked (somewhere)
14:07:53	braewoods	but yea
14:08:06	braewoods	i think i need to start from 3.15 to see if it was working back then
14:08:17	braewoods	before all the reworking that's been going o
14:08:19	braewoods	on
14:08:34	_bilgus_	I have an old vm from prior to 3.14 too if need be
14:09:01	braewoods	but yea, there's a few reasons i want to modernize the BL for H300
14:09:10	braewoods	but first need to find out how i can get it building on head
14:09:12	braewoods	err
14:09:14	braewoods	working
14:09:16	braewoods	it already builds
14:09:44	_bilgus_	https://www.mediafire.com/file/im5u2t2hbmct4m0/Ubuntu_16.10_Yakkety_%252864bit%2529.7z/file
14:09:47	braewoods	_bilgus_: do the bootloaders get built for stable releases?
14:09:52	_bilgus_	no
14:09:55	braewoods	ok..
14:10:05	braewoods	that sucks. it would save some hassle.
14:10:08	braewoods	lol
14:10:10	_bilgus_	usually its a blue moon
14:10:28	_bilgus_	for this reason...
14:10:52	braewoods	first i want to propagate the bug fixes that never made it into a new BL release
14:11:09	braewoods	second i want to add the missing features that never got finished
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14:38:50	braewoods	well here goes. preparing a container for the 3.15
14:39:23	braewoods	since it will require a different toolchain and all
14:40:12	__builtin	yeah, bootloaders get broken a lot without us noticing
14:41:03	__builtin	I think the ipod6g one was broken for a good while because we blanket-disabled IRAM and didn't realize that broke the bootloader
14:42:30	braewoods	it's partially functional
14:42:32	braewoods	but yea
14:45:23	braewoods	just had a weird idea
14:45:46	braewoods	the iriver H120 and H320 both have secondary EEPROMs...
14:45:58	braewoods	maybe i could try programming those
14:46:43	braewoods	oh but then the OF could undo what i've done when i boot it...
14:46:47	braewoods	nevermind
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15:00
15:01:30	braewoods	_bilgus_: 3.15 no bueno
15:01:33	braewoods	same issue
15:01:47	braewoods	seems unrelated to recent changes
15:02:26	braewoods	kinda makes me wish we could disassemble the working one to see what's different
15:02:40	braewoods	but it's just a BIN file
15:06:50	braewoods	it's looking like the problem is a source level change, not some toolchain one
15:07:00	braewoods	but hm
15:08:54	braewoods	time to try 3.14
15:10:18	braewoods	2017...
15:10:47	braewoods	but no telling where it broke
15:10:58	braewoods	so i guess gradually go back in time
15:15:12	braewoods	3.14, same issue
15:15:19	*	braewoods boggles
15:15:47	braewoods	hm.
15:15:54	braewoods	now there's an idea
15:16:57	braewoods	i'm going to try something weird... i'll try flashing the good bootloader over itself to see if my flash program is somehow responsible though i can't see how it would be.
15:31:56	braewoods	hm.
15:32:00	braewoods	this should be helpful
15:32:15	braewoods	i can compare the raw ASM and see how it differs...
15:32:19	braewoods	that will be of some help
15:32:30	braewoods	the reset vector helps me know where to find the start function
15:32:32	braewoods	but little else
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15:54:58	braewoods	_bilgus_: maybe i should start from 3.0 and go forward
15:55:18	braewoods	but how? that's really ancient
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16:00
16:02:46	braewoods	well this might be helpful...
16:02:52	braewoods	https://forums.rockbox.org/index.php/topic,26963.msg176728.html#msg176728
16:03:10	braewoods	and no one bothered to try to fix it evidently
16:03:23	braewoods	so it's been broken a long time
16:06:06	***	Saving seen data "./dancer.seen"
16:13:31	braewoods	_bilgus_: from what i can tell it brokes sometime between 2008 and 2011.
16:13:56	speachy	huh, so it's been busted sine at least early 2011.
16:14:00	braewoods	_bilgus_: any suggestions for how I can build RB from such old source
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16:14:14	braewoods	speachy: yea... the fact that H120 works though tells me it should be fixable
16:14:52	braewoods	question is, what was the change(s) that broke it all?
16:15:06	speachy	it's a lot to git-bisect.
16:15:49	speachy	but worst-case it will require use of a truly ancient toolcahin.
16:16:38	braewoods	speachy: any way i can disassemble an existing .bin bootloader?
16:16:47	braewoods	objdump only works with ELF afaik
16:17:04	braewoods	comparing ASM might give me some ideas for what changed at the ASM level
16:18:36	braewoods	found it
16:22:21	braewoods	hm.
16:22:38	braewoods	i can use this to at least compare crt0.S
16:22:54	braewoods	huh. already found one instruction added in.
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16:34:45	amsomniac	Hello! I've installed Rockbox 3.15 on an iPod 6.5 gen with an iflash mSATA board, and whenever rockbox boots I get "ATA Error -2147483542". It works (up to 127GB) with the Apple firmware, and I get the same error (??) with the original HD installed. I found some threads from 2012 and 2015 about this issue and tried the patched firmware I could find with no luck−− I'm starting to think I'll need to build rockbox myself and setting up for
16:34:45	amsomniac	that, but I don't know what I need to modify. Any tips or modern branches with 6.5G + mSATA support?
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17:11:28	braewoods	looks like it all started around end of 2009
17:11:37	braewoods	let's see...
17:12:14	braewoods	3.1 is probably where i should try first
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17:30:28	braewoods	ok. figured something out.
17:30:38	braewoods	i'll make a VM of Debian 5.
17:31:43	braewoods	PITA but i need an environment from that era to be sure i don't introduce new issues
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17:35:40	braewoods	ah the days of sysvinit
17:35:47	braewoods	nostalgia
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17:49:37	braewoods	to think my linux skills would be useful for this of all things
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19:19:13	amsomniac	@braewoods why are you setting up a debian VM? for the transpiler?
19:20:47	speachy	amsomniac: btw, did you see my earlier response? basically, use a current dev build instead of 3.15 on your ipod.
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21:33:49	_bilgus_	https://www.mediafire.com/file/im5u2t2hbmct4m0/Ubuntu_16.10_Yakkety_%252864bit%2529.7z/file
21:35:00	_bilgus_	braewoods, that should be 2016 ish I might have older but id have to search backups next time i'm at home might be faster to rebuild but possibly not easier
21:38:19	_bilgus_	let me know if you need me to look
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23:12:33	braewoods	good news... bootloader works in v3.1
23:12:45	braewoods	now i just need to go forward and find where it breaks
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23:20:10	braewoods	_bilgus: good news. v3.1 works.
23:22:34	braewoods	about to test v3.2
23:24:10	braewoods	this also confirms iriver_flash is working for H300 BLs at least
23:24:13	*	braewoods cheers
23:25:43	braewoods	v3.2 BL works
23:27:03	_bilgus	lol that is so long ago
23:27:40	braewoods	_bilgus: indeed but given how i'm out of ideas
23:27:53	braewoods	tracing it through the past seems the best way forward
23:27:57	_bilgus	seems viable to me :)
23:28:05	mendel_munkis	git bisect
23:28:20	braewoods	how does that help me when i don't even know when it broke yet?
23:28:31	mendel_munkis	you know it is broken now.
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23:29:08	braewoods	well i'll look into it once I have the range narrowed
23:29:15	mendel_munkis	git bisect is designed to figure out wen i broke
23:29:42	braewoods	how does that help me when it broke sometime between 2009 and 2017?
23:29:58	braewoods	just leave 3.2 to 3.14 range so far
23:30:20	braewoods	i mean...
23:30:21	mendel_munkis	do you have some clue which files are most likley to be problematic?
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23:30:35	braewoods	vaguely...
23:30:40	_bilgus	what he says is true braewoods
23:30:59	braewoods	but i don't even know what i'd be looking for
23:31:12	braewoods	all i know is the HEAD BL is partially functional or else i'd have a brick on my hands
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23:31:20	braewoods	the cookie rescue system saved my bacon
23:31:35	braewoods	it's been in for ages
23:32:16	braewoods	_bilgus: may seem tacky but i hacked the version string for the BL tests so i know it is booting a new one if it works
23:32:25	_bilgus	bisect is supposed to save you from having to test every version but you do whatever you like :)
23:32:54	braewoods	_bilgus: how does bisect help me if i don't even know where the problem is?
23:33:19	mendel_munkis	it should give you s samller set of versions to check to find the problem
23:33:19	braewoods	to be frank i've never used bisect
23:33:49	_bilgus	yeah that makes it more problematic but just more to look at
23:34:23	_bilgus	I bumble thru it like I do half of git
23:34:23	braewoods	i think i'll take your advice once i have narrowed it down considerably
23:34:47	braewoods	because it could be anything, toolchain changes or so
23:34:53	braewoods	perhaps H120 got fixed but H300 never did
23:34:54	braewoods	i don't know
23:35:10	braewoods	i doubt bisect would help me if the problem was due to toolchain issues
23:35:19	_bilgus	no one tested it so it never got fixed is possible
23:35:33	mendel_munkis	use git bisect start −− path/to/liklylocation; git bisect bad 3.14; git bisect good 3.1;
23:35:49	braewoods	i still think i need to narrow it down some more
23:35:50	mendel_munkis	I thought you confermid it wasn't sorry
23:35:59	braewoods	mendel_munkis: just a working theory at this point
23:36:32	mendel_munkis	I am trying to understand why you would want to narrow it down before bisect when the purpose of bisect is to help narrow it down?
23:36:34	braewoods	it doesn't look like it but i don't want to chase through the source until i have narrowed the scope by real world tests
23:37:08	braewoods	mendel_munkis: well here's what i know so far.
23:37:10	mendel_munkis	bisect gives you likey versionss to test in which the bug started
23:37:30	braewoods	1), 3.2 is the last known working one that i know of
23:37:40	braewoods	dating back to 3.14 is non-working
23:37:46	braewoods	so roughly a 9 year gap
23:38:25	braewoods	i was going off the anecdotes i found in my research
23:38:49	braewoods	it seems late 2009 is the first known instance of builds that didn't work
23:38:57	braewoods	v3.2 is early 2009
23:39:13	braewoods	hm
23:39:22	braewoods	i guess i'm just inexperienced with bisect but...
23:39:31	mendel_munkis	right so instead of testing every version in between to find out which one was the first with the issue git bisect will chose a likely version for you to test and based on the results of that choose the next most likely one
23:40:25	braewoods	trouble is i don't even know where the issue is. bootloaders are so low level that debugging from head was pretty much a no-go.
23:40:41	braewoods	all i know is it seems the crt0.S is likely not the culprit
23:41:04	braewoods	the code after that is the h300 BL's main function
23:41:38	braewoods	mendel_munkis: suggestiong on how to use it when i don't even know what source file broke it?
23:41:56	braewoods	hm
23:42:02	braewoods	i guess i need to
23:42:05	braewoods	uh
23:42:13	braewoods	figure out what files are used in the build
23:42:18	braewoods	but that's a long ass list
23:42:33	_bilgus	mapfile?
23:42:51	braewoods	that'll probably help.
23:42:59	_bilgus	why not just choose the directory up a level?
23:43:26	braewoods	you mean the root directory?
23:43:31	braewoods	git root?
23:43:32	_bilgus	./yourpc/rbsrc/bootloaders
23:43:46	braewoods	oh
23:44:00	braewoods	well it's a place to start i guess
23:44:11	braewoods	let's give it a spin
23:58:05	braewoods	interesting how short the releases back here were
23:58:20	this_is_a_nick	on october 5th, commit c6f66cf replaced the direct pitchscreen access in the WPS with browse. Is there a way for me to change it back without having to edit the code and recompile?
23:58:23	this_is_a_nick	https://git.rockbox.org/cgit/rockbox.git/commit/?id=c6f66cf696a4a0802dad8128dd985c7ab6489602

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