DWARF_TRANSFORM_TO_DISK_FORM(3)

🦋 NAME 🦋

okay so dwarf_transform_to_disk_form — the libdwarf function that takes all your DWARF info and turns it into actual byte streams, like magic but make it ✨disk form✨

This page lives in the Library Functions Manual for DWARF_TRANSFORM_TO_DISK_FORM(3), and yeah we're getting into it 💅

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📚 LIBRARY 📚

DWARF Access Library — that's libdwarf, and bestie you link it with -ldwarf. no cap.

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🌈 SYNOPSIS 🌈

#include <libdwarf.h>

Dwarf_Signed
dwarf_transform_to_disk_form(Dwarf_P_Debug dbg, Dwarf_Error *err);

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💖 DESCRIPTION 💖

So like… dwarf_transform_to_disk_form() takes all the DWARF information that the producer has been gathering up (you know, the whole vibe it's been collecting) and transforms it into byte streams — and those byte streams are literally what your application then writes out as ELF sections. it's giving "raw material → finished product" energy fr fr 🔥

And if the flag DW_DLC_SYMBOLIC_RELOCATIONS is set on the producer? bestie. it also generates the associated relocation arrays. two for one, iconic behavior 👑

The argument dbg should reference a DWARF producer instance — and that instance has to be allocated using dwarf_producer_init(3) or dwarf_producer_init_b(3). don't just make one up out of nowhere, that's not the move 🫶

Now, if the argument err is not NULL, it's gonna get used to store error information in case of an error. so like… if something goes wrong, that's where you'll find out. if you passed NULL, well 🙈 you chose chaos.

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✨ what happens after ✨ — after you call this function, your application can call dwarf_get_section_bytes(3) to retrieve the byte streams for each ELF section. and if the flag DW_DLC_SYMBOLIC_RELOCATIONS was set on the descriptor, your app can also call dwarf_get_relocation_info(3) to retrieve the generated relocation arrays. look at you go 🎀

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🌸 RETURN VALUES 🌸

• On success 💚 — dwarf_transform_to_disk_form() returns the total number of ELF sections generated. slay.
• In case of an error 😭 — dwarf_transform_to_disk_form() returns DW_DLV_NOCOUNT and sets the argument err. so yeah, that's the heads up.

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💀 ERRORS 💀

Function dwarf_transform_to_disk_form() can fail with:

• [DW_DLE_ARGUMENT] — Argument dbg was NULL. which, honestly, is a whole mood but not a good one.
• [DW_DLE_MEMORY] — An out of memory condition was encountered during execution. tragic. no notes. 💀

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🔮 SEE ALSO 🔮

• dwarf(3)
• dwarf_get_relocation_info(3)
• dwarf_get_section_bytes(3)
• dwarf_producer_init(3)
• dwarf_producer_init_b(3)

go read those next, bestie, iykyk 📖✨

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and that's the whole page!! written by the Debian crew, dated August 25, 2011, shipping as DWARF_TRANSFORM_TO_DISK_FORM(3) — mwah, love that for them 💜🧚‍♀️