arch/loongarch/include/uapi/asm/sigcontext.h

File Facts

System

Linux kernel

Corpus path

arch/loongarch/include/uapi/asm/sigcontext.h

Extension

.h

Size

1409 bytes

Lines

72

Domain

Architecture Layer

Bucket

arch/loongarch

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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/types.h

Detected Declarations

• struct sigcontext
• struct sctx_info
• struct fpu_context
• struct lsx_context
• struct lasx_context
• struct lbt_context

Annotated Snippet

struct sigcontext {
	__u64	sc_pc;
	__u64	sc_regs[32];
	__u32	sc_flags;
	__u64	sc_extcontext[0] __attribute__((__aligned__(16)));
};

#define CONTEXT_INFO_ALIGN	16
struct sctx_info {
	__u32	magic;
	__u32	size;
	__u64	padding;	/* padding to 16 bytes */
};

/* FPU context */
#define FPU_CTX_MAGIC		0x46505501
#define FPU_CTX_ALIGN		8
struct fpu_context {
	__u64	regs[32];
	__u64	fcc;
	__u32	fcsr;
};

/* LSX context */
#define LSX_CTX_MAGIC		0x53580001
#define LSX_CTX_ALIGN		16
struct lsx_context {
	__u64	regs[2*32];
	__u64	fcc;
	__u32	fcsr;
};

/* LASX context */
#define LASX_CTX_MAGIC		0x41535801
#define LASX_CTX_ALIGN		32
struct lasx_context {
	__u64	regs[4*32];
	__u64	fcc;
	__u32	fcsr;
};

/* LBT context */
#define LBT_CTX_MAGIC		0x42540001
#define LBT_CTX_ALIGN		8
struct lbt_context {
	__u64	regs[4];
	__u32	eflags;
	__u32	ftop;
};


#endif /* _UAPI_ASM_SIGCONTEXT_H */

Annotation

• Immediate include surface: `linux/types.h`.
• Detected declarations: `struct sigcontext`, `struct sctx_info`, `struct fpu_context`, `struct lsx_context`, `struct lasx_context`, `struct lbt_context`.
• Atlas domain: Architecture Layer / arch/loongarch.
• 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.