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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 | 49 | #ifdef CONFIG_IWMMXT |
25985edc | 50 | /* iwmmxt_area is 0x98 bytes long, preceded by 8 bytes of signature */ |
85fe0681 DJ |
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 | |
85fe0681 | 62 | #define VFP_MAGIC 0x56465001 |
85fe0681 DJ |
63 | |
64 | struct vfp_sigframe | |
65 | { | |
66 | unsigned long magic; | |
67 | unsigned long size; | |
82c6f5a5 ID |
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 | ||
85fe0681 DJ |
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 { | |
3bec6ded LB |
87 | #ifdef CONFIG_CRUNCH |
88 | struct crunch_sigframe crunch; | |
89 | #endif | |
85fe0681 DJ |
90 | #ifdef CONFIG_IWMMXT |
91 | struct iwmmxt_sigframe iwmmxt; | |
92 | #endif | |
82c6f5a5 | 93 | #ifdef CONFIG_VFP |
85fe0681 DJ |
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 | ||
1da177e4 | 102 | #endif /* !_ASMARM_UCONTEXT_H */ |