2 * Copyright (C) 2012 ARM Ltd.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
16 #ifndef _UAPI__ASM_SIGCONTEXT_H
17 #define _UAPI__ASM_SIGCONTEXT_H
19 #include <linux/types.h>
22 * Signal context structure - contains all info to do with the state
23 * before the signal handler was invoked.
27 /* AArch64 registers */
32 /* 4K reserved for FP/SIMD state and future expansion */
33 __u8 __reserved[4096] __attribute__((__aligned__(16)));
37 * Allocation of __reserved[]:
38 * (Note: records do not necessarily occur in the order shown here.)
42 * 0x210 fpsimd_context
44 * 0x10 terminator (null _aarch64_ctx)
46 * 0xdd0 (reserved for future allocation)
48 * New records that can exceed this space need to be opt-in for userspace, so
49 * that an expanded signal frame is not generated unexpectedly. The mechanism
50 * for opting in will depend on the extension that generates each new record.
51 * The above table documents the maximum set and sizes of records than can be
52 * generated when userspace does not opt in for any such extension.
56 * Header to be used at the beginning of structures extending the user
57 * context. Such structures must be placed after the rt_sigframe on the stack
58 * and be 16-byte aligned. The last structure must be a dummy one with the
59 * magic and size set to 0.
66 #define FPSIMD_MAGIC 0x46508001
68 struct fpsimd_context {
69 struct _aarch64_ctx head;
72 __uint128_t vregs[32];
76 #define ESR_MAGIC 0x45535201
79 struct _aarch64_ctx head;
83 #endif /* _UAPI__ASM_SIGCONTEXT_H */