Greg Kroah-Hartman | e2be04c | 2017-11-01 15:09:13 +0100 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
David Howells | 4262a72 | 2012-10-11 11:05:13 +0100 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (C) 2012 ARM Ltd. |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License version 2 as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 16 | */ |
| 17 | #ifndef _UAPI__ASM_SIGCONTEXT_H |
| 18 | #define _UAPI__ASM_SIGCONTEXT_H |
| 19 | |
| 20 | #include <linux/types.h> |
| 21 | |
| 22 | /* |
| 23 | * Signal context structure - contains all info to do with the state |
| 24 | * before the signal handler was invoked. |
| 25 | */ |
| 26 | struct sigcontext { |
| 27 | __u64 fault_address; |
| 28 | /* AArch64 registers */ |
| 29 | __u64 regs[31]; |
| 30 | __u64 sp; |
| 31 | __u64 pc; |
| 32 | __u64 pstate; |
| 33 | /* 4K reserved for FP/SIMD state and future expansion */ |
| 34 | __u8 __reserved[4096] __attribute__((__aligned__(16))); |
| 35 | }; |
| 36 | |
| 37 | /* |
Dave Martin | bb4322f | 2017-06-15 15:03:41 +0100 | [diff] [blame] | 38 | * Allocation of __reserved[]: |
| 39 | * (Note: records do not necessarily occur in the order shown here.) |
| 40 | * |
| 41 | * size description |
| 42 | * |
| 43 | * 0x210 fpsimd_context |
| 44 | * 0x10 esr_context |
Dave Martin | 33f0826 | 2017-06-20 18:23:39 +0100 | [diff] [blame] | 45 | * 0x20 extra_context (optional) |
Dave Martin | bb4322f | 2017-06-15 15:03:41 +0100 | [diff] [blame] | 46 | * 0x10 terminator (null _aarch64_ctx) |
| 47 | * |
Dave Martin | 33f0826 | 2017-06-20 18:23:39 +0100 | [diff] [blame] | 48 | * 0xdb0 (reserved for future allocation) |
Dave Martin | bb4322f | 2017-06-15 15:03:41 +0100 | [diff] [blame] | 49 | * |
| 50 | * New records that can exceed this space need to be opt-in for userspace, so |
| 51 | * that an expanded signal frame is not generated unexpectedly. The mechanism |
| 52 | * for opting in will depend on the extension that generates each new record. |
| 53 | * The above table documents the maximum set and sizes of records than can be |
| 54 | * generated when userspace does not opt in for any such extension. |
| 55 | */ |
| 56 | |
| 57 | /* |
David Howells | 4262a72 | 2012-10-11 11:05:13 +0100 | [diff] [blame] | 58 | * Header to be used at the beginning of structures extending the user |
| 59 | * context. Such structures must be placed after the rt_sigframe on the stack |
| 60 | * and be 16-byte aligned. The last structure must be a dummy one with the |
| 61 | * magic and size set to 0. |
| 62 | */ |
| 63 | struct _aarch64_ctx { |
| 64 | __u32 magic; |
| 65 | __u32 size; |
| 66 | }; |
| 67 | |
| 68 | #define FPSIMD_MAGIC 0x46508001 |
| 69 | |
| 70 | struct fpsimd_context { |
| 71 | struct _aarch64_ctx head; |
| 72 | __u32 fpsr; |
| 73 | __u32 fpcr; |
| 74 | __uint128_t vregs[32]; |
| 75 | }; |
| 76 | |
Catalin Marinas | 15af194 | 2013-09-16 15:19:27 +0100 | [diff] [blame] | 77 | /* ESR_EL1 context */ |
| 78 | #define ESR_MAGIC 0x45535201 |
| 79 | |
| 80 | struct esr_context { |
| 81 | struct _aarch64_ctx head; |
Mark Salter | 5e40645 | 2014-06-11 21:14:42 +0100 | [diff] [blame] | 82 | __u64 esr; |
Catalin Marinas | 15af194 | 2013-09-16 15:19:27 +0100 | [diff] [blame] | 83 | }; |
David Howells | 4262a72 | 2012-10-11 11:05:13 +0100 | [diff] [blame] | 84 | |
Dave Martin | 33f0826 | 2017-06-20 18:23:39 +0100 | [diff] [blame] | 85 | /* |
| 86 | * extra_context: describes extra space in the signal frame for |
| 87 | * additional structures that don't fit in sigcontext.__reserved[]. |
| 88 | * |
| 89 | * Note: |
| 90 | * |
| 91 | * 1) fpsimd_context, esr_context and extra_context must be placed in |
| 92 | * sigcontext.__reserved[] if present. They cannot be placed in the |
| 93 | * extra space. Any other record can be placed either in the extra |
| 94 | * space or in sigcontext.__reserved[], unless otherwise specified in |
| 95 | * this file. |
| 96 | * |
| 97 | * 2) There must not be more than one extra_context. |
| 98 | * |
| 99 | * 3) If extra_context is present, it must be followed immediately in |
| 100 | * sigcontext.__reserved[] by the terminating null _aarch64_ctx. |
| 101 | * |
| 102 | * 4) The extra space to which datap points must start at the first |
| 103 | * 16-byte aligned address immediately after the terminating null |
| 104 | * _aarch64_ctx that follows the extra_context structure in |
| 105 | * __reserved[]. The extra space may overrun the end of __reserved[], |
| 106 | * as indicated by a sufficiently large value for the size field. |
| 107 | * |
| 108 | * 5) The extra space must itself be terminated with a null |
| 109 | * _aarch64_ctx. |
| 110 | */ |
| 111 | #define EXTRA_MAGIC 0x45585401 |
| 112 | |
| 113 | struct extra_context { |
| 114 | struct _aarch64_ctx head; |
| 115 | __u64 datap; /* 16-byte aligned pointer to extra space cast to __u64 */ |
| 116 | __u32 size; /* size in bytes of the extra space */ |
| 117 | __u32 __reserved[3]; |
| 118 | }; |
| 119 | |
David Howells | 4262a72 | 2012-10-11 11:05:13 +0100 | [diff] [blame] | 120 | #endif /* _UAPI__ASM_SIGCONTEXT_H */ |