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<klange>
Hm, in Misaka I made the reported kernel name for utsname still be `toaru` with `misaka` as the codename, but I'm thinking I should promote `misaka` to the kernel name so I can do different release codenames...
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<klange>
toaru32's release codenames were character names, but now that the kernel itself is the name of a character I should switch to a new scheme. Maybe song titles from the anime. "Misaka 2.0.0 'only my railgun'"...
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<zid>
When you said misaka I was exactly thinking of a release name of 'railgun'
<klange>
Reasonably certain they're not looking for a DOS programmer, your job alert query matched on the body of the listing where they include DOS experience.
<kazinsal>
nor am I quite certain why any of us would have any interest in such a job if it existed
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<varad>
I am trying to debug a runaway EIP on emulated x86_64. I want the CPU to start in protected mode without paging, with the entrypoint of an ELF32 I have loaded.
<varad>
I've packed a 32bit GDT in the ELF (and set the emulator's gdtr to the paddr it is linked to load at).
<varad>
From memory dumps I see that there is valid code at the ELF entrypoint (0x40000c), but when I reset, the EIP goes to arbitrary addresses and halts. Sometimes it's a few bytes close to the entrypoint. Others it's far into the abyss.
<klange>
I don't believe that does anything with the startup process, it just puts your file in memory. You're still going to be booted by the BIOS.
<klange>
If you're attached to having an option like that, I suggest looking at Multiboot - QEMU supports the original spec directly with the `-kernel` option (assuming your ELF doesn't also happen to appear to be a Linux kernel)
<klange>
(I think the loader device is intended for other platforms, not PC)
<varad>
I'm trying to use the ELF as the starting point. The doc claims that "CPU’s PC to be set to the memory address where the raw file is loaded" - and I've patched the CPU setup path to hard-code the gdt/cs/ds locations
<varad>
ok, it might be non-PC, I'll check that
<klange>
Note it only does that if you specify the cpu-num, but again, this interface was not meant for PC emulation and without the startup code from seabios you are going to have a difficult time.
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<kazinsal>
Excellent. I think Git just ate a bunch of my work.
<vdamewood>
Yum
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<kazinsal>
Every time I have to dive through the reflog to cherry pick out disappeared commits I feel like I'm ripping a hole through spacetime and violating causality to gain a few hours of my life back
<j`ey>
oh yeah, when youre looking at reflog youre not having a good day
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<sortie>
kazinsal, ah yes the naive science fiction authors that think time travel is just undoing dictators, when in reality it's a long gruesome process of handing merge conflicts, rebase fallout, finding lost hunks in the reflog, with nuclear options like git filter-branch
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<kazinsal>
The real ramifications of FTL travel is that you'll have recovered the commit you accidentally made to a detached head and promptly overwrote with a soft reset before you realize what you've done
<sortie>
“WARNING git filter-branch has a plethora of pitfalls that can produce non-obvious manglings of the intended history rewrite”
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<geist>
well, i'm sure you know this but before going any further, look at `git reflog`
<geist>
once you get something into a commit you can pretty much always get it back
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<sortie>
Also a stash
<sortie>
Or git add
<sortie>
As long as it touched the index at one point, it's recoverable until it gets GC'd
<clever>
i wasnt aware that `git add` would put it into the object store, but i can see it being of use for perf
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<vin>
Hi, where can I study about x86 memory durability and ordering gurantees?
<kazinsal>
You might actually be able to get a hard copy of the SDMs still
<kazinsal>
But it's like, nine books now
<vin>
Yea I have seen a hard copy, it's huge!
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<vin>
I enjoy reading architecture synthesis lectures, especially the one on cache coherency. Since there are a plethora of ways to provide atomicity and durability gurantees expected someone to have done a comparitive study
<vin>
Since there are both hardware and software approaches, makes it all the more interesting.
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