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#rockbox log for 2012-09-21

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10:45:19wodzkugel: http://sourceware.org/bugzilla/show_bug.cgi?id=14603
10:53:16kugellet's see what happens
10:53:37kugelwodz: did you see my last question shortly after you left=
10:54:48wodzyou mean how ld manages to judge to insert veneer?
10:55:37kugelyou said it deduces that from the linker script, which make sense if the binary is fully resolved
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10:56:20wodzIn our case it is fully resolved. I don't know what it does in case of libs etc.
10:57:07kugelmaybe I'm confusing the term "fully resolved", it's not exactly known how far iram and dram are away
10:57:10kugel+but
10:58:30wodzwhy? You provide base addresses in linker script. ld knows the offsets of the symbols so it can calculate final distance, or I miss something
10:58:33kugelI mean we know the start of the secions for a given target so we can make assumptions but the actual addresses where the code ends up is determined at runtime isnt it?
10:59:24wodzbut the offset usually stays the same
11:00
11:00:06wodznormally you move whole blob in address space and not dismantle this and reloc separately
11:00:12kugelwe provide the base address in the script? I thought we want to do that at runtime (or is that a later step)?
11:01:24wodzlets make one step back and set the common terms. Do we discuss bFLT scheme?
11:01:44kugeli think so
11:03:18wodzok. So in regular bFLT scheme you link binary at 0. This gives fully resolved binary (unless you use libs but we don't). −−emit-reloc includes relocs in final elf even if it is resolved.
11:04:03kugelright
11:04:12wodzThen elf2flt process this elf and output flat file which basically is header + binary + relocs
11:04:45kugelyep
11:04:50wodzThen loader evaluate the relocs based on provided running address at load time.
11:05:34wodzThis is all simple. The complication comes from address space split.
11:06:18kugelright
11:06:32wodzIn theory you could treat it exactly the same with the difference that you have two such images - one of dram and one for iram
11:07:12wodzyou could link dram at 0 and iram at say 0x80000000 and treat 31bit of vma as a marker
11:08:25wodzthis would work if ld inserted veneers with this 0x80xxxxxx addresses had associated relocs so elf2flt could take it into account
11:08:56kugelah so the veneers are inserted because of the marker?
11:09:22wodzpartly yes
11:09:43wodzbut veneers are needed anyway to reach iram on PP
11:09:53kugeli know
11:10:01kugelbut not e.g. on sansa ams
11:10:36wodzthats another problem
11:10:42kugelthat's why I wondered how the script determines whether it needs veneers
11:11:02kugelbut I hadnt thought of the marker
11:11:52wodzWe could use different markers on different targets
11:12:16wodzif the marker stays within 32MB range it will not trigger veneer insertion
11:12:54kugelsounds workable
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11:14:55wodzheh - bugreport rejected as invalid
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11:18:44kugelI think he misunderstood the problem
11:19:47wodzme to
11:19:53wodz*too
11:20:15kugelhe seems to think the problem is that no veneer is inserted
11:21:42wodzI added the comment
11:21:55wodzapparently he didn't run the testcase :-)
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11:51:43wodzkugel: New answer to my comment in bintutils bugzilla is as I expected
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15:23:15amayer_i have 1 valid post in my "new topics" on the forums
15:23:24amayer_is spam really that bad?
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15:57:05gevaertsyes
15:57:22*gevaerts heads over to the admin section to delete some
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19:24:29n1sinitial benchmark of opus on h300, only the 16kbps file is realtime, the other samples are below 50%
19:31:17bertrikouch
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19:35:34n1sbertrik: not too bad actually, using iram will probably help a lot
19:36:50n1si'm going to try a profile to see how it looks, do you have any idea about what buffers or tables are the hottest?
19:37:42bertrikno
19:43:55n1sumounting the h300 after unzipping a new build keeps telling me the fs is busy :/
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19:45:02bertrik"porting" so far basically amounting to making the minimum required set of files to compile inside the rockbox framework
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20:08:04n1shmm, profiling run seems to have "worked" but no output was written
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20:15:30super96X\whois advcomp2019
20:16:34n1sah screwed up the placement of the profsop call
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20:30:09super96Xi would like to contribute to the wiki, can someone add me to the wiki users group? thanks
20:30:40gevaertsWhat's your wiki username?
20:37:37super96XDJMarcolesco
20:37:57super96Xer, DjMarcolesco
20:39:35gevaertsIs that your actual name?
20:39:41super96Xyup
20:40:06gevaertsDj is a bit of an unusual first name :)
20:40:18super96Xtell me about it
20:40:19super96XXD
20:40:43super96Xwell, technically its my initials if that's what you mean
20:40:50super96Xwhich is probably what you mean
20:40:50super96X:D
20:42:00gevaertsOK, added
20:42:04gevaertsWelcome!
20:42:15super96Xthnx!
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21:46:57lorenzo92can a concurrent multiple call to a function lead to Segmentation Fault?
21:47:49lorenzo92i.e. threading / irq context
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21:50:58*bluebrother wonders when initials started becoming a real name
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23:28:59lorenzo92kugel: rds works fine, but crashes from time to time, not fixed time...seems "casual" and I cannot understand really why
23:29:41lorenzo92so, it's time to gdb! I know you already used it, could you please help me in case? :)
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