Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Kyle McMartin | f671c45 | 2006-01-15 14:10:29 -0500 | [diff] [blame] | 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 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
| 52 | /* ELF32 signal handling */ |
| 53 | |
| 54 | struct k_sigaction32 { |
| 55 | struct compat_sigaction sa; |
| 56 | }; |
| 57 | |
Kyle McMartin | f671c45 | 2006-01-15 14:10:29 -0500 | [diff] [blame] | 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 |
Simon Arlott | 7022672 | 2007-05-11 20:42:34 +0100 | [diff] [blame] | 116 | * guaranteed to be in the same place. In fact the uc_sigmask from the |
Kyle McMartin | f671c45 | 2006-01-15 14:10:29 -0500 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |