1/* 2 * Copyright (C) 2001 Matthew Wilcox <willy at parisc-linux.org> 3 * Copyright (C) 2003 Carlos O'Donell <carlos at parisc-linux.org> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 18 */ 19#ifndef _PARISC64_KERNEL_SIGNAL32_H 20#define _PARISC64_KERNEL_SIGNAL32_H 21 22#include <linux/compat.h> 23 24typedef compat_uptr_t compat_sighandler_t; 25 26typedef struct compat_sigaltstack { 27 compat_uptr_t ss_sp; 28 compat_int_t ss_flags; 29 compat_size_t ss_size; 30} compat_stack_t; 31 32/* Most things should be clean enough to redefine this at will, if care 33 is taken to make libc match. */ 34 35struct compat_sigaction { 36 compat_sighandler_t sa_handler; 37 compat_uint_t sa_flags; 38 compat_sigset_t sa_mask; /* mask last for extensibility */ 39}; 40 41/* 32-bit ucontext as seen from an 64-bit kernel */ 42struct compat_ucontext { 43 compat_uint_t uc_flags; 44 compat_uptr_t uc_link; 45 compat_stack_t uc_stack; /* struct compat_sigaltstack (12 bytes)*/ 46 compat_uint_t pad[1]; 47 struct compat_sigcontext uc_mcontext; 48 compat_sigset_t uc_sigmask; /* mask last for extensibility */ 49}; 50 51/* ELF32 signal handling */ 52 53struct k_sigaction32 { 54 struct compat_sigaction sa; 55}; 56 57typedef struct compat_siginfo { 58 int si_signo; 59 int si_errno; 60 int si_code; 61 62 union { 63 int _pad[((128/sizeof(int)) - 3)]; 64 65 /* kill() */ 66 struct { 67 unsigned int _pid; /* sender's pid */ 68 unsigned int _uid; /* sender's uid */ 69 } _kill; 70 71 /* POSIX.1b timers */ 72 struct { 73 compat_timer_t _tid; /* timer id */ 74 int _overrun; /* overrun count */ 75 char _pad[sizeof(unsigned int) - sizeof(int)]; 76 compat_sigval_t _sigval; /* same as below */ 77 int _sys_private; /* not to be passed to user */ 78 } _timer; 79 80 /* POSIX.1b signals */ 81 struct { 82 unsigned int _pid; /* sender's pid */ 83 unsigned int _uid; /* sender's uid */ 84 compat_sigval_t _sigval; 85 } _rt; 86 87 /* SIGCHLD */ 88 struct { 89 unsigned int _pid; /* which child */ 90 unsigned int _uid; /* sender's uid */ 91 int _status; /* exit code */ 92 compat_clock_t _utime; 93 compat_clock_t _stime; 94 } _sigchld; 95 96 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */ 97 struct { 98 unsigned int _addr; /* faulting insn/memory ref. */ 99 } _sigfault; 100 101 /* SIGPOLL */ 102 struct { 103 int _band; /* POLL_IN, POLL_OUT, POLL_MSG */ 104 int _fd; 105 } _sigpoll; 106 } _sifields; 107} compat_siginfo_t; 108 109int copy_siginfo_to_user32 (compat_siginfo_t __user *to, siginfo_t *from); 110int copy_siginfo_from_user32 (siginfo_t *to, compat_siginfo_t __user *from); 111 112/* In a deft move of uber-hackery, we decide to carry the top half of all 113 * 64-bit registers in a non-portable, non-ABI, hidden structure. 114 * Userspace can read the hidden structure if it *wants* but is never 115 * guaranteed to be in the same place. In fact the uc_sigmask from the 116 * ucontext_t structure may push the hidden register file downards 117 */ 118struct compat_regfile { 119 /* Upper half of all the 64-bit registers that were truncated 120 on a copy to a 32-bit userspace */ 121 compat_int_t rf_gr[32]; 122 compat_int_t rf_iasq[2]; 123 compat_int_t rf_iaoq[2]; 124 compat_int_t rf_sar; 125}; 126 127#define COMPAT_SIGRETURN_TRAMP 4 128#define COMPAT_SIGRESTARTBLOCK_TRAMP 5 129#define COMPAT_TRAMP_SIZE (COMPAT_SIGRETURN_TRAMP + \ 130 COMPAT_SIGRESTARTBLOCK_TRAMP) 131 132struct compat_rt_sigframe { 133 compat_uint_t tramp[COMPAT_TRAMP_SIZE]; 134 compat_siginfo_t info; 135 struct compat_ucontext uc; 136 /* Hidden location of truncated registers, *must* be last. */ 137 struct compat_regfile regs; 138}; 139 140/* 141 * The 32-bit ABI wants at least 48 bytes for a function call frame: 142 * 16 bytes for arg0-arg3, and 32 bytes for magic (the only part of 143 * which Linux/parisc uses is sp-20 for the saved return pointer...) 144 * Then, the stack pointer must be rounded to a cache line (64 bytes). 145 */ 146#define SIGFRAME32 64 147#define FUNCTIONCALLFRAME32 48 148#define PARISC_RT_SIGFRAME_SIZE32 (((sizeof(struct compat_rt_sigframe) + FUNCTIONCALLFRAME32) + SIGFRAME32) & -SIGFRAME32) 149 150void sigset_32to64(sigset_t *s64, compat_sigset_t *s32); 151void sigset_64to32(compat_sigset_t *s32, sigset_t *s64); 152int do_sigaltstack32 (const compat_stack_t __user *uss32, 153 compat_stack_t __user *uoss32, unsigned long sp); 154long restore_sigcontext32(struct compat_sigcontext __user *sc, 155 struct compat_regfile __user *rf, 156 struct pt_regs *regs); 157long setup_sigcontext32(struct compat_sigcontext __user *sc, 158 struct compat_regfile __user *rf, 159 struct pt_regs *regs, int in_syscall); 160 161#endif 162