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<
kristianpaul>
gcc 4.7.1 freezed my machine when trying to compile lm32...
<
wpwrak>
out of memory ?
<
wpwrak>
or maybe a file system corruption
<
kristianpaul>
hard disk got too much active..
<
kristianpaul>
perhaps because out of memory
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<
kristianpaul>
wpwrak: how i can now the cause if the system got freeze?
<
mischief6>
maybe try storing the source/objects in ramfs
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<
sh4rm4>
kristianpaul, running it with ulimit on should give you a clue
<
sh4rm4>
LDFLAGS="-Wl,--no-keep-memory" might help to keep memory usage
*a lot* smaller
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<
lekernel>
kristianpaul: use clang :)
<
lekernel>
chances are the gcc bugs didn't get fixed, and in fact probably got worse
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<
kristianpaul>
clang filled my home dir with 10Gb of garbage...
<
kristianpaul>
or whatever
<
kristianpaul>
if got worse i'll last best working
<
lekernel>
worksforme... and it's ~300MB
<
kristianpaul>
bad experience :)
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<
lekernel>
what "garbage" did it produce?
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<
kristianpaul>
when running configure ;)
<
kristianpaul>
havent able to get it with cmake
<
lekernel>
ah, autocrap. haven't tried it - only cmake...
<
lekernel>
I think it's better to fix this cmake problem rather than gcc bugs... most probably easier too
<
wpwrak>
kristianpaul: if the disk gets very busy, this sounds like a lack of memory
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<
lekernel>
either way gcc will segfault during bootstrap (or fail sooner)
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<
GitHub36>
[milkymist-mmu/mmu-bios] Fix incorrect return to physical address upon ITLB page fault exception - Yann Sionneau
<
wpwrak>
important detail :)
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<
Fallenou>
it's not correct yet, I just noticed I modify ea
*after* calling save_all , it will be overwritten by the call to restore_all_and_eret
<
wpwrak>
on a dtlb fault, is the itlb deactivated ? or does it keep its mode ?
<
Fallenou>
upon any exception, both dtlb and itlb are desactivated
<
Fallenou>
upon eret (return from exception) both itlb and dtlb are activated back
<
wpwrak>
good. a dtlb miss then pushes the virtual address ?
<
Fallenou>
I hope :)
<
Fallenou>
I have not checked, but it should
<
Fallenou>
I hope it's not pushing the physical address
<
Fallenou>
will check tomorrow, I am running out of battery right now =)
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<
Fallenou>
the thing is upon dtlb_miss you have access to the virtual address which caused the exeption
<
Fallenou>
but it's the loaded or stored address
<
Fallenou>
not the address of the instruction itself
<
Fallenou>
not sure if I will have easy access to the virtual address of the instruction causing the dtlb miss
<
wpwrak>
you'll need it for stack traces ... and also to return after resolving the fault
<
Fallenou>
in theory PC should contain virtual address
<
Fallenou>
so EA should be correctly set by the pipeline :o
<
wpwrak>
good. that's what i would have expected :) now, why is the PC physical (and not virtual) in the case of an itlb miss ?
<
Fallenou>
well it's a good point
<
Fallenou>
I'm now feeling that my previous commit is total bullshit
<
Fallenou>
I was completely sure about it this morning in the subway :)
<
Fallenou>
let think about it again tomorrow with hopefully a more clear/healthy brain
<
Fallenou>
enough scary commits for tonight, gn8 :)
<
wpwrak>
faultless dreams ! :)
<
Fallenou>
ahah thanks, you too :p
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