/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ /* * Copyright (C) 2012 ARM Ltd. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #ifndef _UAPI__ASM_SIGCONTEXT_H #define _UAPI__ASM_SIGCONTEXT_H #include <linux/types.h> /* * Signal context structure - contains all info to do with the state * before the signal handler was invoked. */ struct sigcontext { __u64 fault_address; /* AArch64 registers */ __u64 regs[31]; __u64 sp; __u64 pc; __u64 pstate; /* 4K reserved for FP/SIMD state and future expansion */ __u8 __reserved[4096] __attribute__((__aligned__(16))); }; /* * Allocation of __reserved[]: * (Note: records do not necessarily occur in the order shown here.) * * size description * * 0x210 fpsimd_context * 0x10 esr_context * 0x20 extra_context (optional) * 0x10 terminator (null _aarch64_ctx) * * 0xdb0 (reserved for future allocation) * * New records that can exceed this space need to be opt-in for userspace, so * that an expanded signal frame is not generated unexpectedly. The mechanism * for opting in will depend on the extension that generates each new record. * The above table documents the maximum set and sizes of records than can be * generated when userspace does not opt in for any such extension. */ /* * Header to be used at the beginning of structures extending the user * context. Such structures must be placed after the rt_sigframe on the stack * and be 16-byte aligned. The last structure must be a dummy one with the * magic and size set to 0. */ struct _aarch64_ctx { __u32 magic; __u32 size; }; #define FPSIMD_MAGIC 0x46508001 struct fpsimd_context { struct _aarch64_ctx head; __u32 fpsr; __u32 fpcr; __uint128_t vregs[32]; }; /* ESR_EL1 context */ #define ESR_MAGIC 0x45535201 struct esr_context { struct _aarch64_ctx head; __u64 esr; }; /* * extra_context: describes extra space in the signal frame for * additional structures that don't fit in sigcontext.__reserved[]. * * Note: * * 1) fpsimd_context, esr_context and extra_context must be placed in * sigcontext.__reserved[] if present. They cannot be placed in the * extra space. Any other record can be placed either in the extra * space or in sigcontext.__reserved[], unless otherwise specified in * this file. * * 2) There must not be more than one extra_context. * * 3) If extra_context is present, it must be followed immediately in * sigcontext.__reserved[] by the terminating null _aarch64_ctx. * * 4) The extra space to which datap points must start at the first * 16-byte aligned address immediately after the terminating null * _aarch64_ctx that follows the extra_context structure in * __reserved[]. The extra space may overrun the end of __reserved[], * as indicated by a sufficiently large value for the size field. * * 5) The extra space must itself be terminated with a null * _aarch64_ctx. */ #define EXTRA_MAGIC 0x45585401 struct extra_context { struct _aarch64_ctx head; __u64 datap; /* 16-byte aligned pointer to extra space cast to __u64 */ __u32 size; /* size in bytes of the extra space */ __u32 __reserved[3]; }; #endif /* _UAPI__ASM_SIGCONTEXT_H */Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 91 | 65.94% | 1 | 20.00% |
| Dave P Martin | 29 | 21.01% | 1 | 20.00% |
| Catalin Marinas | 16 | 11.59% | 1 | 20.00% |
| Mark Salter | 1 | 0.72% | 1 | 20.00% |
| Greg Kroah-Hartman | 1 | 0.72% | 1 | 20.00% |
| Total | 138 | 100.00% | 5 | 100.00% |