11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (C) 2001 Matthew Wilcox <willy at parisc-linux.org> 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (C) 2003 Carlos O'Donell <carlos at parisc-linux.org> 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is free software; you can redistribute it and/or modify 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it under the terms of the GNU General Public License as published by 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the Free Software Foundation; either version 2 of the License, or 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (at your option) any later version. 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is distributed in the hope that it will be useful, 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * but WITHOUT ANY WARRANTY; without even the implied warranty of 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * GNU General Public License for more details. 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * You should have received a copy of the GNU General Public License 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * along with this program; if not, write to the Free Software 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifndef _PARISC64_KERNEL_SIGNAL32_H 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define _PARISC64_KERNEL_SIGNAL32_H 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/compat.h> 23f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin 24f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin/* 32-bit ucontext as seen from an 64-bit kernel */ 25f671c45df23005692daa200aba768c642fb14ef2Kyle McMartinstruct compat_ucontext { 26f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin compat_uint_t uc_flags; 27f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin compat_uptr_t uc_link; 28f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin compat_stack_t uc_stack; /* struct compat_sigaltstack (12 bytes)*/ 29f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin /* FIXME: Pad out to get uc_mcontext to start at an 8-byte aligned boundary */ 30f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin compat_uint_t pad[1]; 31f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin struct compat_sigcontext uc_mcontext; 32f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin compat_sigset_t uc_sigmask; /* mask last for extensibility */ 33f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin}; 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* ELF32 signal handling */ 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37ce3959604878c1c693979ec552069dc8bdb5ccdeAl Viroint copy_siginfo_to_user32 (compat_siginfo_t __user *to, const siginfo_t *from); 38f671c45df23005692daa200aba768c642fb14ef2Kyle McMartinint copy_siginfo_from_user32 (siginfo_t *to, compat_siginfo_t __user *from); 39f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin 40f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin/* In a deft move of uber-hackery, we decide to carry the top half of all 41f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin * 64-bit registers in a non-portable, non-ABI, hidden structure. 42f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin * Userspace can read the hidden structure if it *wants* but is never 437022672e4046fac4699aa5f8ff2a5213b7ec4ff9Simon Arlott * guaranteed to be in the same place. In fact the uc_sigmask from the 44f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin * ucontext_t structure may push the hidden register file downards 45f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin */ 46f671c45df23005692daa200aba768c642fb14ef2Kyle McMartinstruct compat_regfile { 47f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin /* Upper half of all the 64-bit registers that were truncated 48f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin on a copy to a 32-bit userspace */ 49f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin compat_int_t rf_gr[32]; 50f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin compat_int_t rf_iasq[2]; 51f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin compat_int_t rf_iaoq[2]; 52f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin compat_int_t rf_sar; 53f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin}; 54f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin 55f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin#define COMPAT_SIGRETURN_TRAMP 4 56f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin#define COMPAT_SIGRESTARTBLOCK_TRAMP 5 57f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin#define COMPAT_TRAMP_SIZE (COMPAT_SIGRETURN_TRAMP + \ 58f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin COMPAT_SIGRESTARTBLOCK_TRAMP) 59f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin 60f671c45df23005692daa200aba768c642fb14ef2Kyle McMartinstruct compat_rt_sigframe { 61f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin /* XXX: Must match trampoline size in arch/parisc/kernel/signal.c 62f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin Secondary to that it must protect the ERESTART_RESTARTBLOCK 63f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin trampoline we left on the stack (we were bad and didn't 64f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin change sp so we could run really fast.) */ 65f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin compat_uint_t tramp[COMPAT_TRAMP_SIZE]; 66f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin compat_siginfo_t info; 67f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin struct compat_ucontext uc; 68f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin /* Hidden location of truncated registers, *must* be last. */ 69f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin struct compat_regfile regs; 70f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin}; 71f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin 72f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin/* 73f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin * The 32-bit ABI wants at least 48 bytes for a function call frame: 74f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin * 16 bytes for arg0-arg3, and 32 bytes for magic (the only part of 75f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin * which Linux/parisc uses is sp-20 for the saved return pointer...) 76f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin * Then, the stack pointer must be rounded to a cache line (64 bytes). 77f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin */ 78f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin#define SIGFRAME32 64 79f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin#define FUNCTIONCALLFRAME32 48 80f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin#define PARISC_RT_SIGFRAME_SIZE32 (((sizeof(struct compat_rt_sigframe) + FUNCTIONCALLFRAME32) + SIGFRAME32) & -SIGFRAME32) 81f671c45df23005692daa200aba768c642fb14ef2Kyle McMartin 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid sigset_32to64(sigset_t *s64, compat_sigset_t *s32); 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid sigset_64to32(compat_sigset_t *s32, sigset_t *s64); 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldslong restore_sigcontext32(struct compat_sigcontext __user *sc, 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct compat_regfile __user *rf, 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pt_regs *regs); 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldslong setup_sigcontext32(struct compat_sigcontext __user *sc, 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct compat_regfile __user *rf, 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pt_regs *regs, int in_syscall); 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 92