linux/arch/x86/include/asm/ucontext.h

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#ifndef _ASM_X86_UCONTEXT_H
#define _ASM_X86_UCONTEXT_H
#define UC_FP_XSTATE 0x1 /* indicates the presence of extended state
* information in the memory layout pointed
* by the fpstate pointer in the ucontext's
* sigcontext struct (uc_mcontext).
*/
struct ucontext {
unsigned long uc_flags;
struct ucontext *uc_link;
stack_t uc_stack;
struct sigcontext uc_mcontext;
sigset_t uc_sigmask; /* mask last for extensibility */
};
#endif /* _ASM_X86_UCONTEXT_H */