CPU_COREDUMP(9)

✨ NAME ✨

okay so bestie, welcome to CPU_COREDUMP(9) from the Kernel Developer's Manual — this page is literally all about cpu_coredump, the machine-dependent process core dump interface. no cap, that's the whole vibe. 💅

🎀 SYNOPSIS 🎀

#include <sys/signalvar.h>

int
cpu_coredump(struct lwp *l, void *iocookie, struct core *chdr);

int
cpu_coredump32(struct lwp *l, void *iocookie, struct core32 *chdr);

yep, both cpu_coredump() and cpu_coredump32() are up there — keep those signatures exactly as they are, bestie. 🫶

🦋 DESCRIPTION 🦋

so cpu_coredump() is the machine-dependent interface that machine-independent code invokes to dump the machine-dependent header information at the very start of a process core dump. it's giving backstage-pass energy for the CPU-specific bits. ✨

the header information primarily consists of the CPU and floating-point registers. iconic.

here's the cast:

• l — the lwp structure of the thread being dumped. main character energy. 👑
• iocookie — an opaque pointer to be passed to coredump_write(). don't peek inside, it's opaque for a reason. 🙈
• chdr — information about the machine-dependent header sections is returned in here. 🫶

cpu_coredump() returns 0 on success and an appropriate error code on failure. periodt. 💅

🔥 CODE REFERENCES 🔥

process core dumps are initiated within the file sys/kern/kern_sig.c. 🫡

process core dumps for ELF NetBSD binaries are performed within the files sys/kern/core_elf32.c or sys/kern/core_elf64.c. ✨

process core dumps for other NetBSD binaries are performed within the file sys/kern/core_netbsd.c. 💖

💜 SEE ALSO 💜

• coredump_write(9)

---

mwah 💋 — this page is from Debian, dated December 24, 2005. now go dump those cores responsibly, bestie! 🎀