arch/x86/crypto/aesni-intel_asm.S

Source file repositories/reference/linux-study-clean/arch/x86/crypto/aesni-intel_asm.S

File Facts

System
Linux kernel
Corpus path
arch/x86/crypto/aesni-intel_asm.S
Extension
.S
Size
26648 bytes
Lines
1339
Domain
Architecture Layer
Bucket
arch/x86
Inferred role
Architecture Layer: arch/x86
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.

Dependency Surface

Detected Declarations

Annotated Snippet

#include <linux/linkage.h>
#include <linux/objtool.h>
#include <asm/frame.h>

#define STATE1	%xmm0
#define STATE2	%xmm4
#define STATE3	%xmm5
#define STATE4	%xmm6
#define STATE	STATE1
#define IN1	%xmm1
#define IN2	%xmm7
#define IN3	%xmm8
#define IN4	%xmm9
#define IN	IN1
#define KEY	%xmm2
#define IV	%xmm3

#define BSWAP_MASK %xmm10
#define CTR	%xmm11
#define INC	%xmm12

#define GF128MUL_MASK %xmm7

#ifdef __x86_64__
#define AREG	%rax
#define KEYP	%rdi
#define OUTP	%rsi
#define UKEYP	OUTP
#define INP	%rdx
#define LEN	%rcx
#define IVP	%r8
#define KLEN	%r9d
#define T1	%r10
#define TKEYP	T1
#define T2	%r11
#define TCTR_LOW T2
#else
#define AREG	%eax
#define KEYP	%edi
#define OUTP	AREG
#define UKEYP	OUTP
#define INP	%edx
#define LEN	%esi
#define IVP	%ebp
#define KLEN	%ebx
#define T1	%ecx
#define TKEYP	T1
#endif

SYM_FUNC_START_LOCAL(_key_expansion_256a)
	pshufd $0b11111111, %xmm1, %xmm1
	shufps $0b00010000, %xmm0, %xmm4
	pxor %xmm4, %xmm0
	shufps $0b10001100, %xmm0, %xmm4
	pxor %xmm4, %xmm0
	pxor %xmm1, %xmm0
	movaps %xmm0, (TKEYP)
	add $0x10, TKEYP
	RET
SYM_FUNC_END(_key_expansion_256a)
SYM_FUNC_ALIAS_LOCAL(_key_expansion_128, _key_expansion_256a)

SYM_FUNC_START_LOCAL(_key_expansion_192a)
	pshufd $0b01010101, %xmm1, %xmm1
	shufps $0b00010000, %xmm0, %xmm4
	pxor %xmm4, %xmm0
	shufps $0b10001100, %xmm0, %xmm4
	pxor %xmm4, %xmm0
	pxor %xmm1, %xmm0

Annotation

Implementation Notes