/* SPDX-License-Identifier: GPL-2.0 */#ifndef _ASMARM_UCONTEXT_H#define _ASMARM_UCONTEXT_H #include <asm/fpstate.h>#include <asm/user.h> /* * struct sigcontext only has room for the basic registers, but struct * ucontext now has room for all registers which need to be saved and * restored.  Coprocessor registers are stored in uc_regspace.  Each * coprocessor's saved state should start with a documented 32-bit magic * number, followed by a 32-bit word giving the coproccesor's saved size. * uc_regspace may be expanded if necessary, although this takes some * coordination with glibc. */ struct ucontext {	unsigned long	  uc_flags;	struct ucontext  *uc_link;	stack_t		  uc_stack;	struct sigcontext uc_mcontext;	sigset_t	  uc_sigmask;	/* Allow for uc_sigmask growth.  Glibc uses a 1024-bit sigset_t.  */	int		  __unused[32 - (sizeof (sigset_t) / sizeof (int))];	/* Last for extensibility.  Eight byte aligned because some	   coprocessors require eight byte alignment.  */ 	unsigned long	  uc_regspace[128] __attribute__((__aligned__(8)));}; #ifdef __KERNEL__ /* * Coprocessor save state.  The magic values and specific * coprocessor's layouts are part of the userspace ABI.  Each one of * these should be a multiple of eight bytes and aligned to eight * bytes, to prevent unpredictable padding in the signal frame. */ /* * Dummy padding block: if this magic is encountered, the block should * be skipped using the corresponding size field. */#define DUMMY_MAGIC		0xb0d9ed01 #ifdef CONFIG_IWMMXT/* iwmmxt_area is 0x98 bytes long, preceded by 8 bytes of signature */#define IWMMXT_MAGIC		0x12ef842a#define IWMMXT_STORAGE_SIZE	(IWMMXT_SIZE + 8) struct iwmmxt_sigframe {	unsigned long	magic;	unsigned long	size;	struct iwmmxt_struct storage;} __attribute__((__aligned__(8)));#endif /* CONFIG_IWMMXT */ #ifdef CONFIG_VFP#define VFP_MAGIC		0x56465001 struct vfp_sigframe{	unsigned long		magic;	unsigned long		size;	struct user_vfp		ufp;	struct user_vfp_exc	ufp_exc;} __attribute__((__aligned__(8))); /* *  8 byte for magic and size, 264 byte for ufp, 12 bytes for ufp_exc, *  4 bytes padding. */#define VFP_STORAGE_SIZE	sizeof(struct vfp_sigframe) #endif /* CONFIG_VFP */ /* * Auxiliary signal frame.  This saves stuff like FP state. * The layout of this structure is not part of the user ABI, * because the config options aren't.  uc_regspace is really * one of these. */struct aux_sigframe {#ifdef CONFIG_IWMMXT	struct iwmmxt_sigframe	iwmmxt;#endif#ifdef CONFIG_VFP	struct vfp_sigframe	vfp;#endif	/* Something that isn't a valid magic number for any coprocessor.  */	unsigned long		end_magic;} __attribute__((__aligned__(8))); #endif #endif /* !_ASMARM_UCONTEXT_H */