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 24 typedef compat_uptr_t compat_sighandler_t; 25 26 typedef 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 35 struct 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 */ 42 struct 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 /* FIXME: Pad out to get uc_mcontext to start at an 8-byte aligned boundary */ 47 compat_uint_t pad[1]; 48 struct compat_sigcontext uc_mcontext; 49 compat_sigset_t uc_sigmask; /* mask last for extensibility */ 50 }; 51 52 /* ELF32 signal handling */ 53 54 struct k_sigaction32 { 55 struct compat_sigaction sa; 56 }; 57 58 typedef struct compat_siginfo { 59 int si_signo; 60 int si_errno; 61 int si_code; 62 63 union { 64 int _pad[((128/sizeof(int)) - 3)]; 65 66 /* kill() */ 67 struct { 68 unsigned int _pid; /* sender's pid */ 69 unsigned int _uid; /* sender's uid */ 70 } _kill; 71 72 /* POSIX.1b timers */ 73 struct { 74 compat_timer_t _tid; /* timer id */ 75 int _overrun; /* overrun count */ 76 char _pad[sizeof(unsigned int) - sizeof(int)]; 77 compat_sigval_t _sigval; /* same as below */ 78 int _sys_private; /* not to be passed to user */ 79 } _timer; 80 81 /* POSIX.1b signals */ 82 struct { 83 unsigned int _pid; /* sender's pid */ 84 unsigned int _uid; /* sender's uid */ 85 compat_sigval_t _sigval; 86 } _rt; 87 88 /* SIGCHLD */ 89 struct { 90 unsigned int _pid; /* which child */ 91 unsigned int _uid; /* sender's uid */ 92 int _status; /* exit code */ 93 compat_clock_t _utime; 94 compat_clock_t _stime; 95 } _sigchld; 96 97 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */ 98 struct { 99 unsigned int _addr; /* faulting insn/memory ref. */ 100 } _sigfault; 101 102 /* SIGPOLL */ 103 struct { 104 int _band; /* POLL_IN, POLL_OUT, POLL_MSG */ 105 int _fd; 106 } _sigpoll; 107 } _sifields; 108 } compat_siginfo_t; 109 110 int copy_siginfo_to_user32 (compat_siginfo_t __user *to, siginfo_t *from); 111 int copy_siginfo_from_user32 (siginfo_t *to, compat_siginfo_t __user *from); 112 113 /* In a deft move of uber-hackery, we decide to carry the top half of all 114 * 64-bit registers in a non-portable, non-ABI, hidden structure. 115 * Userspace can read the hidden structure if it *wants* but is never 116 * guaranteed to be in the same place. In fact the uc_sigmask from the 117 * ucontext_t structure may push the hidden register file downards 118 */ 119 struct compat_regfile { 120 /* Upper half of all the 64-bit registers that were truncated 121 on a copy to a 32-bit userspace */ 122 compat_int_t rf_gr[32]; 123 compat_int_t rf_iasq[2]; 124 compat_int_t rf_iaoq[2]; 125 compat_int_t rf_sar; 126 }; 127 128 #define COMPAT_SIGRETURN_TRAMP 4 129 #define COMPAT_SIGRESTARTBLOCK_TRAMP 5 130 #define COMPAT_TRAMP_SIZE (COMPAT_SIGRETURN_TRAMP + \ 131 COMPAT_SIGRESTARTBLOCK_TRAMP) 132 133 struct compat_rt_sigframe { 134 /* XXX: Must match trampoline size in arch/parisc/kernel/signal.c 135 Secondary to that it must protect the ERESTART_RESTARTBLOCK 136 trampoline we left on the stack (we were bad and didn't 137 change sp so we could run really fast.) */ 138 compat_uint_t tramp[COMPAT_TRAMP_SIZE]; 139 compat_siginfo_t info; 140 struct compat_ucontext uc; 141 /* Hidden location of truncated registers, *must* be last. */ 142 struct compat_regfile regs; 143 }; 144 145 /* 146 * The 32-bit ABI wants at least 48 bytes for a function call frame: 147 * 16 bytes for arg0-arg3, and 32 bytes for magic (the only part of 148 * which Linux/parisc uses is sp-20 for the saved return pointer...) 149 * Then, the stack pointer must be rounded to a cache line (64 bytes). 150 */ 151 #define SIGFRAME32 64 152 #define FUNCTIONCALLFRAME32 48 153 #define PARISC_RT_SIGFRAME_SIZE32 (((sizeof(struct compat_rt_sigframe) + FUNCTIONCALLFRAME32) + SIGFRAME32) & -SIGFRAME32) 154 155 void sigset_32to64(sigset_t *s64, compat_sigset_t *s32); 156 void sigset_64to32(compat_sigset_t *s32, sigset_t *s64); 157 int do_sigaltstack32 (const compat_stack_t __user *uss32, 158 compat_stack_t __user *uoss32, unsigned long sp); 159 long restore_sigcontext32(struct compat_sigcontext __user *sc, 160 struct compat_regfile __user *rf, 161 struct pt_regs *regs); 162 long setup_sigcontext32(struct compat_sigcontext __user *sc, 163 struct compat_regfile __user *rf, 164 struct pt_regs *regs, int in_syscall); 165 166 #endif 167