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<damo22>\o/ it works

<youpi>> it crashes if you do return NULL

<youpi>That's really odd and worth investigating, by at least checking what asm instruction exactly produces the crash

<solid_black>hi

<damo22>how do i step by asm?

<solid_black>si

<solid_black>and ni

<solid_black>I've got exciting news :)

<damo22>what is it

<solid_black>ext2fs.static starts and works, and ld.so loads the exec server and all the shared libraries and does all the relocations and whatnot, and the exec server handshakes with ext2fs

<damo22>cool, but no disk?

<solid_black>it currently fails on ext2fs failing to find /servers/exec to put the exec server on, simply because haven't put that node onto the ramdisk

<solid_black>it's ramdisk for now

<damo22>ok

<damo22>im not sure how to write SD card driver

<solid_black>also check this out https://imgur.com/a/W2f329S

<solid_black>I played with DWARF to make exceptions / interrupts look like signals to GDB

<solid_black>and GDB is now totally able to backtrace through interrupt handlers

<solid_black>with full registers, locals, etc

<solid_black>DWARF is really flexible, it lets you encode, in bytecode, where to find saved register values

<solid_black>so I made GDB read our (Mach's) aarch64_thread_state / aarch64_kernel_exception_state that we store

<solid_black>in the same way that the kernel itself does

<solid_black>and reconstruct backtraces / saved variables based on that

<solid_black>there are three different stacks there actually, the userland stack, the PCB stack, and the kernel stack

<solid_black>but GDB is now able to see through them all

<solid_black>how cool is that?

<biblio>solid_black: nice :)

<solid_black>hi biblio

<biblio>solid_black: hi

<solid_black>what's up the risc-v port? :)

<biblio>solid_black: still working with it. No update yet.

<damo22>solid_black: that is cool, but you should write docs on how

<damo22>0x081a8b4b in mach_msg ()

<damo22>(gdb)

<damo22>crash

<solid_black>damo22: so you mean the call instruction is crashing? what kind of crash is that?

<damo22>solid_black: not sure

<youpi>the backtrace would give a better idea

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2024-03-17.log