arch/arm64/kernel/vdso/vgetrandom.c
Source file repositories/reference/linux-study-clean/arch/arm64/kernel/vdso/vgetrandom.c
File Facts
- System
- Linux kernel
- Corpus path
arch/arm64/kernel/vdso/vgetrandom.c- Extension
.c- Size
- 492 bytes
- Lines
- 16
- Domain
- Architecture Layer
- Bucket
- arch/arm64
- 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.
Dependency Surface
uapi/asm-generic/errno.h
Detected Declarations
function __kernel_getrandom
Annotated Snippet
// SPDX-License-Identifier: GPL-2.0
#include <uapi/asm-generic/errno.h>
typeof(__cvdso_getrandom) __kernel_getrandom;
ssize_t __kernel_getrandom(void *buffer, size_t len, unsigned int flags, void *opaque_state, size_t opaque_len)
{
if (alternative_has_cap_likely(ARM64_HAS_FPSIMD))
return __cvdso_getrandom(buffer, len, flags, opaque_state, opaque_len);
if (unlikely(opaque_len == ~0UL && !buffer && !len && !flags))
return -ENOSYS;
return getrandom_syscall(buffer, len, flags);
}
Annotation
- Immediate include surface: `uapi/asm-generic/errno.h`.
- Detected declarations: `function __kernel_getrandom`.
- Atlas domain: Architecture Layer / arch/arm64.
- 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.