Cannot load Playstation 2 ELF.

Question

Cannot load Playstation 2 ELF.

Kneesnap opened this issue 4 years ago · comments

I get this message upon loading the PS2 ELF I've uploaded below.
"The file contains no DWARF information, or it is in an unsupported format."

My understanding is that there is dwarf debug info in this elf, as other dwarf utilities work on it.

Could it be fixed to support this?
Thanks!

sles_507.zip

Kneesnap commented 4 years ago

Any luck?

Seva Alekseyev (he/him) · Answer 1 · Sun Oct 04 2020 09:10:35 GMT+0800 (China Standard Time)

Interesting case. It's an ELF file, but the section names aren't like those on Linux. I'll see if I can parse DWARF out of this...

What "other DWARF utilities", please? I've tried dwarfdump on Linux (x64), it said "No DWARF information present",

Kneesnap · Answer 2 · Mon Oct 05 2020 08:03:20 GMT+0800 (China Standard Time)

The other program I've used is dwarf2cpp https://github.com/pslehisl/dwarf2cpp
I had to modify it slightly since it didn't have handling for unions declared inside of structs, and would exit without saying anything.

However, after making it just leave a comment whenever it encountered that (lazy fix) it exported everything just fine. I was hoping for something that would let me explore the dwarf data more directly though.

Seva Alekseyev (he/him) · Answer 3 · Mon Oct 05 2020 08:33:25 GMT+0800 (China Standard Time)

Thanks, I'll poke around that tool's sources. That said, dwex was not meant for exporting DWARF data. That's what readelf and dwarfdump are for.

Kneesnap · Answer 4 · Mon Oct 05 2020 08:36:03 GMT+0800 (China Standard Time)

Right I'm not looking for exporting. I want something which will let me explore it. I want to get a better feel for various debug information formats, as well as confirm I'm utilizing all of the debug data which is contained in the elf.

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On Sun, Oct 4, 2020, 5:33 PM Seva Alekseyev ***@***.***> wrote: Thanks, I'll poke around that tool's sources. That said, dwex was not meant for *exporting* DWARF data. That's what readelf and dwarfdump are for. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#11 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABSCIYILZ72ZWIPRUVRX62LSJEH6BANCNFSM4SDKLVTQ> .

Seva Alekseyev (he/him) · Answer 5 · Mon Oct 05 2020 09:09:26 GMT+0800 (China Standard Time)

Looks like this is DWARF v1, unsupported by pyelftools :( I'm on my own, more or less, but I'll see what I can do.

Seva Alekseyev (he/him) · Answer 6 · Tue Oct 06 2020 04:47:45 GMT+0800 (China Standard Time)

I have to write a DWARF 1 parser from scratch. It's not a one day deal.

Kneesnap · Answer 7 · Tue Oct 06 2020 07:08:56 GMT+0800 (China Standard Time)

Gotcha, I misunderstood it as you were going to look for another library. Ok! Thank you for taking the time to do that.

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On Mon, Oct 5, 2020, 1:47 PM Seva Alekseyev ***@***.***> wrote: I have to write a DWARF 1 parser from scratch. It's not a one day deal. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#11 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABSCIYIQA6PP4MPLNX4IRWTSJIWH5ANCNFSM4SDKLVTQ> .

Seva Alekseyev (he/him) · Answer 8 · Thu Oct 08 2020 23:16:53 GMT+0800 (China Standard Time)

Updated, please grab the latest.

Note that in the attached file there are some vendor defined attributes that I'm not sure what to do with, and, in one case, a vendor defined operator in a location expression.

Kneesnap · Answer 9 · Fri Oct 09 2020 00:45:40 GMT+0800 (China Standard Time)

Thanks, I'll check it out. I have the compiler which was used to build this, I'll see if there's any documentation on that.

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On Thu, Oct 8, 2020, 8:17 AM Seva Alekseyev ***@***.***> wrote: Updated, please grab the latest. Note that in the attached file there are some vendor defined attributes that I'm not sure what to do with, and, in one case, a vendor defined operator in a location expression. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#11 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABSCIYKJNVMG2MXAQR3A6ELSJXJXNANCNFSM4SDKLVTQ> .

Seva Alekseyev (he/him) · Answer 10 · Thu Oct 22 2020 21:54:13 GMT+0800 (China Standard Time)

Is this still an issue?

Kneesnap · Answer 11 · Fri Oct 23 2020 01:15:55 GMT+0800 (China Standard Time)

I assume you're asking if I still need this functionality. I don't hugely need it, it's not a massive priority. If you don't want to put in the huge effort it'd take to support DWARFv1 that's totally fine with me. I just thought it might help me understand the format better if I could use this tool.

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On Thu, Oct 22, 2020, 6:54 AM Seva Alekseyev ***@***.***> wrote: Reopened #11 <#11>. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#11 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABSCIYL5QQVRC3MI7NFSIP3SMA2RVANCNFSM4SDKLVTQ> .

Seva Alekseyev (he/him) · Answer 12 · Fri Oct 23 2020 01:20:43 GMT+0800 (China Standard Time)

I thought I have provided sufficient support for your purposes in version 0.70. :) I'm really asking if dwex 0.70 opens and displays your PS2 binaries the way you'd like. It works fine (for me) with the provided binary...

Kneesnap · Answer 13 · Fri Oct 23 2020 01:26:36 GMT+0800 (China Standard Time)

Oh! I see! I checked master and didn't see any updates! This is wonderful news, I shall check it out after work. Thank you!

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On Thu, Oct 22, 2020, 10:20 AM Seva Alekseyev ***@***.***> wrote: I thought I have provided sufficient support for your purposes in version 0.70. :) I'm really asking if dwex 0.70 opens and displays your PS2 binaries the way you'd like. It works fine (for me) with the provided binary... — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#11 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABSCIYMS3DYHGASPUMA554DSMBSXXANCNFSM4SDKLVTQ> .

Seva Alekseyev (he/him) · Answer 14 · Fri Oct 23 2020 01:34:44 GMT+0800 (China Standard Time)

Weird, there was a commit, and a tag, and I've uploaded to PyPI, and Help/Check for updates notices it. What were you looking at?

Kneesnap · Answer 15 · Fri Oct 23 2020 01:36:04 GMT+0800 (China Standard Time)

I was checking on my phone, it's quite possible I messed up somehow.

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On Thu, Oct 22, 2020, 10:35 AM Seva Alekseyev ***@***.***> wrote: Weird, there was a commit, and a tag, and I've uploaded to PyPI, and Help/Check for updates notices it. What were you looking at? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#11 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABSCIYNV3FH3FYJ2FZCH5LDSMBUMHANCNFSM4SDKLVTQ> .

Kneesnap · Answer 16 · Mon Oct 26 2020 11:26:29 GMT+0800 (China Standard Time)

I've confirmed it seems to work properly now.