projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | #ifndef _ASMARM_UCONTEXT_H |
| 2 | #define _ASMARM_UCONTEXT_H | |
| 3 | ||
| 85fe0681 DJ |
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 | ||
| 1da177e4 LT |
16 | struct ucontext { |
| 17 | unsigned long uc_flags; | |
| 18 | struct ucontext *uc_link; | |
| 19 | stack_t uc_stack; | |
| 20 | struct sigcontext uc_mcontext; | |
| 85fe0681 DJ |
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))); | |
| 1da177e4 LT |
27 | }; |
| 28 | ||
| 85fe0681 DJ |
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 | ||
| 3bec6ded LB |
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 | ||
| 85fe0681 DJ |
49 | #ifdef CONFIG_IWMMXT |
| 50 | /* iwmmxt_area is 0x98 bytes long, preceeded 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 | #if __LINUX_ARM_ARCH__ < 6 | |
| 63 | /* For ARM pre-v6, we use fstmiax and fldmiax. This adds one extra | |
| 64 | * word after the registers, and a word of padding at the end for | |
| 65 | * alignment. */ | |
| 66 | #define VFP_MAGIC 0x56465001 | |
| 67 | #define VFP_STORAGE_SIZE 152 | |
| 68 | #else | |
| 69 | #define VFP_MAGIC 0x56465002 | |
| 70 | #define VFP_STORAGE_SIZE 144 | |
| 71 | #endif | |
| 72 | ||
| 73 | struct vfp_sigframe | |
| 74 | { | |
| 75 | unsigned long magic; | |
| 76 | unsigned long size; | |
| 77 | union vfp_state storage; | |
| 78 | }; | |
| 79 | #endif /* CONFIG_VFP */ | |
| 80 | ||
| 81 | /* | |
| 82 | * Auxiliary signal frame. This saves stuff like FP state. | |
| 83 | * The layout of this structure is not part of the user ABI, | |
| 84 | * because the config options aren't. uc_regspace is really | |
| 85 | * one of these. | |
| 86 | */ | |
| 87 | struct aux_sigframe { | |
| 3bec6ded LB |
88 | #ifdef CONFIG_CRUNCH |
| 89 | struct crunch_sigframe crunch; | |
| 90 | #endif | |
| 85fe0681 DJ |
91 | #ifdef CONFIG_IWMMXT |
| 92 | struct iwmmxt_sigframe iwmmxt; | |
| 93 | #endif | |
| 94 | #if 0 && defined CONFIG_VFP /* Not yet saved. */ | |
| 95 | struct vfp_sigframe vfp; | |
| 96 | #endif | |
| 97 | /* Something that isn't a valid magic number for any coprocessor. */ | |
| 98 | unsigned long end_magic; | |
| 99 | } __attribute__((__aligned__(8))); | |
| 100 | ||
| 101 | #endif | |
| 102 | ||
| 1da177e4 | 103 | #endif /* !_ASMARM_UCONTEXT_H */ |