arch_has_block_step(9)

✨ NAME ✨

okay so bestie, this is the arch_has_block_step(9) page from the Kernel API Manual, and it's basically a CPU vibe check 👑

arch_has_block_step — does this CPU support user-mode block-step? periodt 💅

🌸 SYNOPSIS 🌸

arch_has_block_step

🦋 DESCRIPTION 🦋

If this is defined, then there must be a function declaration or inline for user_enable_block_step, and arch_has_single_step must be defined too. fr fr, those are the rules 🫶

arch_has_block_step should evaluate to nonzero iff the machine supports step-until-branch for user mode. It can be a constant or it can test a CPU feature bit. so it's giving “yes/no energy,” but make it make sense 😌✨

💖 SEE ALSO 💖

Kernel file ./include/linux/ptrace.h — the whole friend group 💫

• ptrace_may_access(9)
• ptrace_parent(9)
• ptrace_event_enabled(9)
• ptrace_event(9)
• ptrace_event_pid(9)
• ptrace_init_task(9)
• ptrace_release_task(9)
• arch_has_single_step(9)
• user_enable_single_step(9)
• user_disable_single_step(9)
• user_enable_block_step(9)
• arch_ptrace_stop_needed(9)
• arch_ptrace_stop(9)
• ptrace_report_syscall_permit_entry(9)
• ptrace_report_syscall_exit(9)

source/version: ./include/linux • date: October 2026 — mwah, go touch some ptrace 💋🫶