DWARF_FORMSIG8(3)

💅 DWARF_FORMSIG8(3) 💅

okay bestie, welcome to the libdwarf corner of the manual pages — yes, that's the DWARF Access Library, and yes you link it with -ldwarf. this one is lowkey tiny but it's iconic, let's get into it 🫶

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✨ NAME ✨

dwarf_formsig8 — returns the 64-bit type signature for a DWARF type. that's the whole mission. slay.

🎀 LIBRARY 🎀

DWARF Access Library (libdwarf, -ldwarf). your fave, fr fr.

🦋 SYNOPSIS 🦋

#include <libdwarf.h>

int
dwarf_formsig8(Dwarf_Attribute attr, Dwarf_Sig8 *ret, Dwarf_Error *err);

🌸 DESCRIPTION 🌸

okay so here's the vibe: dwarf_formsig8() takes the attribute that attr points at, grabs its value, and writes the 64-bit type signature into the place that ret points to. literally just drops it right there for you 💖

and like, there's a catch — the form of attr must be DW_FORM_ref_sig8. that's the form check, periodt. anything else and it's not giving what it needs to give.

oh and if err is not NULL, it gets used to return an error descriptor in case something goes wrong. so if you want the tea on what happened, pass that in 🍓

⭐ RETURN VALUES ⭐

• DW_DLV_OK on success — ate, no notes 👑
• DW_DLV_ERROR if there's an error, and it sets err for you

💀 ERRORS 💀

dwarf_formsig8() may fail with these, so know them:

• [DW_DLE_ARGUMENT] — either attr or ret was NULL. yeah, one of them was just... not there 😭
• [DW_DLE_ATTR_FORM_BAD] — the attribute that attr references was not of a permitted kind. wrong form, wrong vibe, blocked.

🔥 SEE ALSO 🔥

dwarf(3), dwarf_attr(3), dwarf_formflag(3), dwarf_formref(3), dwarf_formsdata(3), dwarf_formstring(3), dwarf_formudata(3), dwarf_hasattr(3) — go read the whole friend group, iykyk 🌈

🧚 HISTORY 🧚

type signatures were added in version 4 of the DWARF specification. so this whole thing is a DWARF 4+ moment 💜

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and that's the page bestie!! this gem is from the Debian edition, dated July 24, 2010 — DWARF_FORMSIG8(3), main character energy, no cap 🎀✨