lib/crypto/arm64/aes-modes.S

File Facts

System

Linux kernel

Corpus path

lib/crypto/arm64/aes-modes.S

Extension

.S

Size

21549 bytes

Lines

868

Domain

Kernel Services

Bucket

lib

Inferred role

Kernel Services: lib

Status

atlas-only

Why This File Exists

Shared kernel service surface used by multiple subsystems, including helpers, cryptography, virtualization support, and async I/O infrastructure.

• Shared kernel service surface used by multiple subsystems, including helpers, cryptography, virtualization support, and async I/O infrastructure.

Dependency Surface

• No C-style include directives detected by the generator.

Detected Declarations

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

Annotated Snippet

.text
	.align		4

#ifndef MAX_STRIDE
#define MAX_STRIDE	4
#endif

#if MAX_STRIDE == 4
#define ST4(x...) x
#define ST5(x...)
#else
#define ST4(x...)
#define ST5(x...) x
#endif

SYM_FUNC_START_LOCAL(aes_encrypt_block4x)
	encrypt_block4x	v0, v1, v2, v3, w3, x2, x8, w7
	ret
SYM_FUNC_END(aes_encrypt_block4x)

SYM_FUNC_START_LOCAL(aes_decrypt_block4x)
	decrypt_block4x	v0, v1, v2, v3, w3, x2, x8, w7
	ret
SYM_FUNC_END(aes_decrypt_block4x)

#if MAX_STRIDE == 5
SYM_FUNC_START_LOCAL(aes_encrypt_block5x)
	encrypt_block5x	v0, v1, v2, v3, v4, w3, x2, x8, w7
	ret
SYM_FUNC_END(aes_encrypt_block5x)

SYM_FUNC_START_LOCAL(aes_decrypt_block5x)
	decrypt_block5x	v0, v1, v2, v3, v4, w3, x2, x8, w7
	ret
SYM_FUNC_END(aes_decrypt_block5x)
#endif

	/*
	 * aes_ecb_encrypt(u8 out[], u8 const in[], u8 const rk[], int rounds,
	 *		   int blocks)
	 * aes_ecb_decrypt(u8 out[], u8 const in[], u8 const rk[], int rounds,
	 *		   int blocks)
	 */

AES_FUNC_START(aes_ecb_encrypt)
	frame_push	0

	enc_prepare	w3, x2, x5

.LecbencloopNx:
	subs		w4, w4, #MAX_STRIDE
	bmi		.Lecbenc1x
	ld1		{v0.16b-v3.16b}, [x1], #64	/* get 4 pt blocks */
ST4(	bl		aes_encrypt_block4x		)
ST5(	ld1		{v4.16b}, [x1], #16		)
ST5(	bl		aes_encrypt_block5x		)
	st1		{v0.16b-v3.16b}, [x0], #64
ST5(	st1		{v4.16b}, [x0], #16		)
	b		.LecbencloopNx
.Lecbenc1x:
	adds		w4, w4, #MAX_STRIDE
	beq		.Lecbencout
.Lecbencloop:
	ld1		{v0.16b}, [x1], #16		/* get next pt block */
	encrypt_block	v0, w3, x2, x5, w6
	st1		{v0.16b}, [x0], #16
	subs		w4, w4, #1
	bne		.Lecbencloop
.Lecbencout:
	frame_pop

Annotation

• Atlas domain: Kernel Services / lib.
• 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.