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