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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>
89 lines
4.3 KiB
C
89 lines
4.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
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#ifndef _ASM_POWERPC_SIGCONTEXT_H
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#define _ASM_POWERPC_SIGCONTEXT_H
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/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/compiler.h>
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#include <asm/ptrace.h>
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#ifdef __powerpc64__
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#include <asm/elf.h>
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#endif
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struct sigcontext {
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unsigned long _unused[4];
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int signal;
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#ifdef __powerpc64__
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int _pad0;
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#endif
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unsigned long handler;
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unsigned long oldmask;
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struct pt_regs __user *regs;
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#ifdef __powerpc64__
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elf_gregset_t gp_regs;
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elf_fpregset_t fp_regs;
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/*
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* To maintain compatibility with current implementations the sigcontext is
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* extended by appending a pointer (v_regs) to a quadword type (elf_vrreg_t)
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* followed by an unstructured (vmx_reserve) field of 101 doublewords. This
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* allows the array of vector registers to be quadword aligned independent of
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* the alignment of the containing sigcontext or ucontext. It is the
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* responsibility of the code setting the sigcontext to set this pointer to
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* either NULL (if this processor does not support the VMX feature) or the
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* address of the first quadword within the allocated (vmx_reserve) area.
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*
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* The pointer (v_regs) of vector type (elf_vrreg_t) is type compatible with
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* an array of 34 quadword entries (elf_vrregset_t). The entries with
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* indexes 0-31 contain the corresponding vector registers. The entry with
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* index 32 contains the vscr as the last word (offset 12) within the
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* quadword. This allows the vscr to be stored as either a quadword (since
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* it must be copied via a vector register to/from storage) or as a word.
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* The entry with index 33 contains the vrsave as the first word (offset 0)
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* within the quadword.
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*
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* Part of the VSX data is stored here also by extending vmx_restore
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* by an additional 32 double words. Architecturally the layout of
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* the VSR registers and how they overlap on top of the legacy FPR and
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* VR registers is shown below:
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*
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* VSR doubleword 0 VSR doubleword 1
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* ----------------------------------------------------------------
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* VSR[0] | FPR[0] | |
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* ----------------------------------------------------------------
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* VSR[1] | FPR[1] | |
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* ----------------------------------------------------------------
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* | ... | |
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* | ... | |
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* ----------------------------------------------------------------
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* VSR[30] | FPR[30] | |
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* ----------------------------------------------------------------
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* VSR[31] | FPR[31] | |
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* ----------------------------------------------------------------
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* VSR[32] | VR[0] |
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* ----------------------------------------------------------------
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* VSR[33] | VR[1] |
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* ----------------------------------------------------------------
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* | ... |
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* | ... |
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* ----------------------------------------------------------------
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* VSR[62] | VR[30] |
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* ----------------------------------------------------------------
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* VSR[63] | VR[31] |
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* ----------------------------------------------------------------
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*
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* FPR/VSR 0-31 doubleword 0 is stored in fp_regs, and VMX/VSR 32-63
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* is stored at the start of vmx_reserve. vmx_reserve is extended for
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* backwards compatility to store VSR 0-31 doubleword 1 after the VMX
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* registers and vscr/vrsave.
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*/
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elf_vrreg_t __user *v_regs;
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long vmx_reserve[ELF_NVRREG + ELF_NVRREG + 1 + 32];
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#endif
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};
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#endif /* _ASM_POWERPC_SIGCONTEXT_H */
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