arch/um/include/asm/stacktrace.h

File Facts

System

Linux kernel

Corpus path

arch/um/include/asm/stacktrace.h

Extension

.h

Size

1088 bytes

Lines

44

Domain

Architecture Layer

Bucket

arch/um

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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/uaccess.h
• linux/ptrace.h

Detected Declarations

• struct stack_frame
• struct stacktrace_ops
• function get_frame_pointer
• function get_frame_pointer

Annotated Snippet

struct stack_frame {
	struct stack_frame *next_frame;
	unsigned long return_address;
};

struct stacktrace_ops {
	void (*address)(void *data, unsigned long address, int reliable);
};

#ifdef CONFIG_FRAME_POINTER
static inline unsigned long
get_frame_pointer(struct task_struct *task, struct pt_regs *segv_regs)
{
	if (!task || task == current)
		return segv_regs ? PT_REGS_BP(segv_regs) : current_bp();
	return KSTK_EBP(task);
}
#else
static inline unsigned long
get_frame_pointer(struct task_struct *task, struct pt_regs *segv_regs)
{
	return 0;
}
#endif

static inline unsigned long
*get_stack_pointer(struct task_struct *task, struct pt_regs *segv_regs)
{
	if (!task || task == current)
		return segv_regs ? (unsigned long *)PT_REGS_SP(segv_regs) : current_sp();
	return (unsigned long *)KSTK_ESP(task);
}

void dump_trace(struct task_struct *tsk, const struct stacktrace_ops *ops, void *data);

#endif /* _ASM_UML_STACKTRACE_H */

Annotation

• Immediate include surface: `linux/uaccess.h`, `linux/ptrace.h`.
• Detected declarations: `struct stack_frame`, `struct stacktrace_ops`, `function get_frame_pointer`, `function get_frame_pointer`.
• Atlas domain: Architecture Layer / arch/um.
• Implementation status: source implementation candidate.

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.