arch/riscv/kernel/vdso/rt_sigreturn.S

File Facts

System

Linux kernel

Corpus path

arch/riscv/kernel/vdso/rt_sigreturn.S

Extension

.S

Size

389 bytes

Lines

21

Domain

Architecture Layer

Bucket

arch/riscv

Inferred role

Architecture Layer: arch/riscv

Status

atlas-only

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.

Dependency Surface

• linux/linkage.h
• asm/unistd.h
• asm/assembler.h

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

#include <linux/linkage.h>
#include <asm/unistd.h>
#include <asm/assembler.h>

	.text
SYM_FUNC_START(__vdso_rt_sigreturn)
	.cfi_startproc
	.cfi_signal_frame
	vdso_lpad
	li a7, __NR_rt_sigreturn
	ecall
	.cfi_endproc
SYM_FUNC_END(__vdso_rt_sigreturn)

emit_riscv_feature_1_and

Annotation

• Immediate include surface: `linux/linkage.h`, `asm/unistd.h`, `asm/assembler.h`.
• Atlas domain: Architecture Layer / arch/riscv.
• Implementation status: atlas-only.

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.