arch/parisc/kernel/ftrace.c

File Facts

System

Linux kernel

Corpus path

arch/parisc/kernel/ftrace.c

Extension

.c

Size

5747 bytes

Lines

255

Domain

Architecture Layer

Bucket

arch/parisc

Inferred role

Architecture Layer: implementation source

Status

source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

• CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/init.h
• linux/ftrace.h
• linux/uaccess.h
• linux/kprobes.h
• linux/ptrace.h
• linux/jump_label.h
• asm/assembly.h
• asm/sections.h
• asm/ftrace.h
• asm/text-patching.h

Detected Declarations

• function prepare_ftrace_return
• function ftrace_function_trampoline
• function ftrace_enable_ftrace_graph_caller
• function ftrace_disable_ftrace_graph_caller
• function ftrace_update_ftrace_func
• function ftrace_modify_call
• function ftrace_call_adjust
• function ftrace_make_call
• function ftrace_make_nop
• function kprobe_ftrace_handler
• function arch_prepare_kprobe_ftrace

Annotated Snippet

if (unlikely(p->post_handler)) {
			kcb->kprobe_status = KPROBE_HIT_SSDONE;
			p->post_handler(p, regs, 0);
		}
	}
	__this_cpu_write(current_kprobe, NULL);
out:
	ftrace_test_recursion_unlock(bit);
}
NOKPROBE_SYMBOL(kprobe_ftrace_handler);

int arch_prepare_kprobe_ftrace(struct kprobe *p)
{
	p->ainsn.insn = NULL;
	return 0;
}
#endif

Annotation

• Immediate include surface: `linux/init.h`, `linux/ftrace.h`, `linux/uaccess.h`, `linux/kprobes.h`, `linux/ptrace.h`, `linux/jump_label.h`, `asm/assembly.h`, `asm/sections.h`.
• Detected declarations: `function prepare_ftrace_return`, `function ftrace_function_trampoline`, `function ftrace_enable_ftrace_graph_caller`, `function ftrace_disable_ftrace_graph_caller`, `function ftrace_update_ftrace_func`, `function ftrace_modify_call`, `function ftrace_call_adjust`, `function ftrace_make_call`, `function ftrace_make_nop`, `function kprobe_ftrace_handler`.
• Atlas domain: Architecture Layer / arch/parisc.
• Implementation status: source implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.