execmem_fill_trapping_insns(9)

🌸 NAME 🌸

okay so this is execmem_fill_trapping_insns(9) from the Kernel API Manual, and it's literally the function that sets memory to contain instructions that will trap. Iconic behavior, honestly. 💅

✨ SYNOPSIS ✨

void execmem_fill_trapping_insns (void *ptr , size_t size );

🦋 ARGUMENTS 🦋

• ptr — pointer to memory to fill. Like, the starting spot, bestie. 🫶
• size — size of the range to fill. The amount of memory getting the treatment. ✨

🎀 DESCRIPTION 🎀

Okay so real talk: this is a hook for architectures to fill execmem ranges with invalid instructions. That's the assignment. No cap. 💀

Architectures that use EXECMEM_ROX_CACHE must implement this. Not optional, not a suggestion — must. Periodt. 👑

💖 SEE ALSO 💖

Kernel file ./include/linux/execmem.h, plus the whole friend group:

• enum execmem_type(9)
• enum execmem_range_flags(9)
• execmem_restore_rox(9)
• struct execmem_range(9)
• struct execmem_info(9)
• execmem_arch_setup(9)
• execmem_alloc(9)
• execmem_alloc_rw(9)
• execmem_free(9)
• execmem_vmap(9)
• execmem_is_rox(9)

Shoutout to the source/version line: ./include/linux, dated October 2026, page execmem_fill_trapping_insns(9). bye bestie, stay trapping ✨💅🫶