lib/crypto/arm64/sha1-ce-core.S
Source file repositories/reference/linux-study-clean/lib/crypto/arm64/sha1-ce-core.S
File Facts
- System
- Linux kernel
- Corpus path
lib/crypto/arm64/sha1-ce-core.S- Extension
.S- Size
- 2605 bytes
- Lines
- 127
- 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.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/linkage.hasm/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/assembler.h>
.text
.arch armv8-a+crypto
k0 .req v0
k1 .req v1
k2 .req v2
k3 .req v3
t0 .req v4
t1 .req v5
dga .req q6
dgav .req v6
dgb .req s7
dgbv .req v7
dg0q .req q12
dg0s .req s12
dg0v .req v12
dg1s .req s13
dg1v .req v13
dg2s .req s14
.macro add_only, op, ev, rc, s0, dg1
.ifc \ev, ev
add t1.4s, v\s0\().4s, \rc\().4s
sha1h dg2s, dg0s
.ifnb \dg1
sha1\op dg0q, \dg1, t0.4s
.else
sha1\op dg0q, dg1s, t0.4s
.endif
.else
.ifnb \s0
add t0.4s, v\s0\().4s, \rc\().4s
.endif
sha1h dg1s, dg0s
sha1\op dg0q, dg2s, t1.4s
.endif
.endm
.macro add_update, op, ev, rc, s0, s1, s2, s3, dg1
sha1su0 v\s0\().4s, v\s1\().4s, v\s2\().4s
add_only \op, \ev, \rc, \s1, \dg1
sha1su1 v\s0\().4s, v\s3\().4s
.endm
.macro loadrc, k, val, tmp
movz \tmp, :abs_g0_nc:\val
movk \tmp, :abs_g1:\val
dup \k, \tmp
.endm
/*
* void sha1_ce_transform(struct sha1_block_state *state,
* const u8 *data, size_t nblocks);
*/
SYM_FUNC_START(sha1_ce_transform)
/* load round constants */
loadrc k0.4s, 0x5a827999, w6
loadrc k1.4s, 0x6ed9eba1, w6
loadrc k2.4s, 0x8f1bbcdc, w6
loadrc k3.4s, 0xca62c1d6, w6
/* load state */
ld1 {dgav.4s}, [x0]
ldr dgb, [x0, #16]
Annotation
- Immediate include surface: `linux/linkage.h`, `asm/assembler.h`.
- 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.