1 #ifndef _ASMARM_UCONTEXT_H 2 #define _ASMARM_UCONTEXT_H 3 4 #include <asm/fpstate.h> 5 6 /* 7 * struct sigcontext only has room for the basic registers, but struct 8 * ucontext now has room for all registers which need to be saved and 9 * restored. Coprocessor registers are stored in uc_regspace. Each 10 * coprocessor's saved state should start with a documented 32-bit magic 11 * number, followed by a 32-bit word giving the coproccesor's saved size. 12 * uc_regspace may be expanded if necessary, although this takes some 13 * coordination with glibc. 14 */ 15 16 struct ucontext { 17 unsigned long uc_flags; 18 struct ucontext *uc_link; 19 stack_t uc_stack; 20 struct sigcontext uc_mcontext; 21 sigset_t uc_sigmask; 22 /* Allow for uc_sigmask growth. Glibc uses a 1024-bit sigset_t. */ 23 int __unused[32 - (sizeof (sigset_t) / sizeof (int))]; 24 /* Last for extensibility. Eight byte aligned because some 25 coprocessors require eight byte alignment. */ 26 unsigned long uc_regspace[128] __attribute__((__aligned__(8))); 27 }; 28 29 #ifdef __KERNEL__ 30 31 /* 32 * Coprocessor save state. The magic values and specific 33 * coprocessor's layouts are part of the userspace ABI. Each one of 34 * these should be a multiple of eight bytes and aligned to eight 35 * bytes, to prevent unpredictable padding in the signal frame. 36 */ 37 38 #ifdef CONFIG_CRUNCH 39 #define CRUNCH_MAGIC 0x5065cf03 40 #define CRUNCH_STORAGE_SIZE (CRUNCH_SIZE + 8) 41 42 struct crunch_sigframe { 43 unsigned long magic; 44 unsigned long size; 45 struct crunch_state storage; 46 } __attribute__((__aligned__(8))); 47 #endif 48 49 #ifdef CONFIG_IWMMXT 50 /* iwmmxt_area is 0x98 bytes long, preceded by 8 bytes of signature */ 51 #define IWMMXT_MAGIC 0x12ef842a 52 #define IWMMXT_STORAGE_SIZE (IWMMXT_SIZE + 8) 53 54 struct iwmmxt_sigframe { 55 unsigned long magic; 56 unsigned long size; 57 struct iwmmxt_struct storage; 58 } __attribute__((__aligned__(8))); 59 #endif /* CONFIG_IWMMXT */ 60 61 #ifdef CONFIG_VFP 62 #define VFP_MAGIC 0x56465001 63 64 struct vfp_sigframe 65 { 66 unsigned long magic; 67 unsigned long size; 68 struct user_vfp ufp; 69 struct user_vfp_exc ufp_exc; 70 } __attribute__((__aligned__(8))); 71 72 /* 73 * 8 byte for magic and size, 264 byte for ufp, 12 bytes for ufp_exc, 74 * 4 bytes padding. 75 */ 76 #define VFP_STORAGE_SIZE sizeof(struct vfp_sigframe) 77 78 #endif /* CONFIG_VFP */ 79 80 /* 81 * Auxiliary signal frame. This saves stuff like FP state. 82 * The layout of this structure is not part of the user ABI, 83 * because the config options aren't. uc_regspace is really 84 * one of these. 85 */ 86 struct aux_sigframe { 87 #ifdef CONFIG_CRUNCH 88 struct crunch_sigframe crunch; 89 #endif 90 #ifdef CONFIG_IWMMXT 91 struct iwmmxt_sigframe iwmmxt; 92 #endif 93 #ifdef CONFIG_VFP 94 struct vfp_sigframe vfp; 95 #endif 96 /* Something that isn't a valid magic number for any coprocessor. */ 97 unsigned long end_magic; 98 } __attribute__((__aligned__(8))); 99 100 #endif 101 102 #endif /* !_ASMARM_UCONTEXT_H */ 103