forked from Minki/linux
e2be04c7f9
Many user space API headers have licensing information, which is either
incomplete, badly formatted or just a shorthand for referring to the
license under which the file is supposed to be. This makes it hard for
compliance tools to determine the correct license.
Update these files with an SPDX license identifier. The identifier was
chosen based on the license information in the file.
GPL/LGPL licensed headers get the matching GPL/LGPL SPDX license
identifier with the added 'WITH Linux-syscall-note' exception, which is
the officially assigned exception identifier for the kernel syscall
exception:
NOTE! This copyright does *not* cover user programs that use kernel
services by normal system calls - this is merely considered normal use
of the kernel, and does *not* fall under the heading of "derived work".
This exception makes it possible to include GPL headers into non GPL
code, without confusing license compliance tools.
Headers which have either explicit dual licensing or are just licensed
under a non GPL license are updated with the corresponding SPDX
identifier and the GPLv2 with syscall exception identifier. The format
is:
((GPL-2.0 WITH Linux-syscall-note) OR SPDX-ID-OF-OTHER-LICENSE)
SPDX license identifiers are a legally binding shorthand, which can be
used instead of the full boiler plate text. The update does not remove
existing license information as this has to be done on a case by case
basis and the copyright holders might have to be consulted. This will
happen in a separate step.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne. See the previous patch in this series for the
methodology of how this patch was researched.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
121 lines
3.6 KiB
C
121 lines
3.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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* Copyright (C) 2012 ARM Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _UAPI__ASM_SIGCONTEXT_H
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#define _UAPI__ASM_SIGCONTEXT_H
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#include <linux/types.h>
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/*
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* Signal context structure - contains all info to do with the state
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* before the signal handler was invoked.
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*/
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struct sigcontext {
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__u64 fault_address;
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/* AArch64 registers */
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__u64 regs[31];
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__u64 sp;
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__u64 pc;
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__u64 pstate;
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/* 4K reserved for FP/SIMD state and future expansion */
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__u8 __reserved[4096] __attribute__((__aligned__(16)));
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};
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/*
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* Allocation of __reserved[]:
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* (Note: records do not necessarily occur in the order shown here.)
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*
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* size description
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*
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* 0x210 fpsimd_context
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* 0x10 esr_context
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* 0x20 extra_context (optional)
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* 0x10 terminator (null _aarch64_ctx)
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*
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* 0xdb0 (reserved for future allocation)
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*
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* New records that can exceed this space need to be opt-in for userspace, so
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* that an expanded signal frame is not generated unexpectedly. The mechanism
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* for opting in will depend on the extension that generates each new record.
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* The above table documents the maximum set and sizes of records than can be
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* generated when userspace does not opt in for any such extension.
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*/
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/*
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* Header to be used at the beginning of structures extending the user
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* context. Such structures must be placed after the rt_sigframe on the stack
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* and be 16-byte aligned. The last structure must be a dummy one with the
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* magic and size set to 0.
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*/
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struct _aarch64_ctx {
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__u32 magic;
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__u32 size;
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};
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#define FPSIMD_MAGIC 0x46508001
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struct fpsimd_context {
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struct _aarch64_ctx head;
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__u32 fpsr;
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__u32 fpcr;
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__uint128_t vregs[32];
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};
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/* ESR_EL1 context */
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#define ESR_MAGIC 0x45535201
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struct esr_context {
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struct _aarch64_ctx head;
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__u64 esr;
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};
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/*
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* extra_context: describes extra space in the signal frame for
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* additional structures that don't fit in sigcontext.__reserved[].
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*
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* Note:
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*
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* 1) fpsimd_context, esr_context and extra_context must be placed in
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* sigcontext.__reserved[] if present. They cannot be placed in the
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* extra space. Any other record can be placed either in the extra
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* space or in sigcontext.__reserved[], unless otherwise specified in
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* this file.
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*
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* 2) There must not be more than one extra_context.
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*
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* 3) If extra_context is present, it must be followed immediately in
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* sigcontext.__reserved[] by the terminating null _aarch64_ctx.
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*
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* 4) The extra space to which datap points must start at the first
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* 16-byte aligned address immediately after the terminating null
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* _aarch64_ctx that follows the extra_context structure in
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* __reserved[]. The extra space may overrun the end of __reserved[],
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* as indicated by a sufficiently large value for the size field.
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*
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* 5) The extra space must itself be terminated with a null
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* _aarch64_ctx.
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*/
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#define EXTRA_MAGIC 0x45585401
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struct extra_context {
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struct _aarch64_ctx head;
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__u64 datap; /* 16-byte aligned pointer to extra space cast to __u64 */
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__u32 size; /* size in bytes of the extra space */
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__u32 __reserved[3];
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};
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#endif /* _UAPI__ASM_SIGCONTEXT_H */
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