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

Source file repositories/reference/linux-study-clean/arch/loongarch/include/uapi/asm/ucontext.h

File Facts

System
Linux kernel
Corpus path
arch/loongarch/include/uapi/asm/ucontext.h
Extension
.h
Size
1377 bytes
Lines
36
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.

Dependency Surface

Detected Declarations

Annotated Snippet

struct ucontext {
	unsigned long		uc_flags;
	struct ucontext		*uc_link;
	stack_t			uc_stack;
	sigset_t		uc_sigmask;
	/* There's some padding here to allow sigset_t to be expanded in the
	 * future.  Though this is unlikely, other architectures put uc_sigmask
	 * at the end of this structure and explicitly state it can be
	 * expanded, so we didn't want to box ourselves in here. */
	__u8		  __unused[1024 / 8 - sizeof(sigset_t)];
	/* We can't put uc_sigmask at the end of this structure because we need
	 * to be able to expand sigcontext in the future.  For example, the
	 * vector ISA extension will almost certainly add ISA state.  We want
	 * to ensure all user-visible ISA state can be saved and restored via a
	 * ucontext, so we're putting this at the end in order to allow for
	 * infinite extensibility.  Since we know this will be extended and we
	 * assume sigset_t won't be extended an extreme amount, we're
	 * prioritizing this. */
	struct sigcontext	uc_mcontext;
};

#endif /* __LOONGARCH_UAPI_ASM_UCONTEXT_H */

Annotation

Implementation Notes