Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This file is subject to the terms and conditions of the GNU General Public |
| 3 | * License. See the file "COPYING" in the main directory of this archive |
| 4 | * for more details. |
| 5 | * |
| 6 | * Copyright (C) 1991, 1992 Linus Torvalds |
Martin Michlmayr | dda73d0 | 2006-02-18 15:21:30 +0000 | [diff] [blame] | 7 | * Copyright (C) 1994 - 2000, 2006 Ralf Baechle |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * Copyright (C) 1999, 2000 Silicon Graphics, Inc. |
| 9 | */ |
Ralf Baechle | 02416dc | 2005-06-15 13:00:12 +0000 | [diff] [blame] | 10 | #include <linux/cache.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #include <linux/sched.h> |
| 12 | #include <linux/mm.h> |
| 13 | #include <linux/smp.h> |
| 14 | #include <linux/smp_lock.h> |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/signal.h> |
| 17 | #include <linux/syscalls.h> |
| 18 | #include <linux/errno.h> |
| 19 | #include <linux/wait.h> |
| 20 | #include <linux/ptrace.h> |
| 21 | #include <linux/compat.h> |
| 22 | #include <linux/suspend.h> |
| 23 | #include <linux/compiler.h> |
| 24 | |
Ralf Baechle | e50c0a8 | 2005-05-31 11:49:19 +0000 | [diff] [blame] | 25 | #include <asm/abi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <asm/asm.h> |
| 27 | #include <linux/bitops.h> |
| 28 | #include <asm/cacheflush.h> |
| 29 | #include <asm/sim.h> |
| 30 | #include <asm/uaccess.h> |
| 31 | #include <asm/ucontext.h> |
| 32 | #include <asm/system.h> |
| 33 | #include <asm/fpu.h> |
Ralf Baechle | 02416dc | 2005-06-15 13:00:12 +0000 | [diff] [blame] | 34 | #include <asm/war.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
| 36 | #define SI_PAD_SIZE32 ((SI_MAX_SIZE/sizeof(int)) - 3) |
| 37 | |
| 38 | typedef struct compat_siginfo { |
| 39 | int si_signo; |
| 40 | int si_code; |
| 41 | int si_errno; |
| 42 | |
| 43 | union { |
| 44 | int _pad[SI_PAD_SIZE32]; |
| 45 | |
| 46 | /* kill() */ |
| 47 | struct { |
| 48 | compat_pid_t _pid; /* sender's pid */ |
| 49 | compat_uid_t _uid; /* sender's uid */ |
| 50 | } _kill; |
| 51 | |
| 52 | /* SIGCHLD */ |
| 53 | struct { |
| 54 | compat_pid_t _pid; /* which child */ |
| 55 | compat_uid_t _uid; /* sender's uid */ |
| 56 | int _status; /* exit code */ |
| 57 | compat_clock_t _utime; |
| 58 | compat_clock_t _stime; |
| 59 | } _sigchld; |
| 60 | |
| 61 | /* IRIX SIGCHLD */ |
| 62 | struct { |
| 63 | compat_pid_t _pid; /* which child */ |
| 64 | compat_clock_t _utime; |
| 65 | int _status; /* exit code */ |
| 66 | compat_clock_t _stime; |
| 67 | } _irix_sigchld; |
| 68 | |
| 69 | /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */ |
| 70 | struct { |
| 71 | s32 _addr; /* faulting insn/memory ref. */ |
| 72 | } _sigfault; |
| 73 | |
| 74 | /* SIGPOLL, SIGXFSZ (To do ...) */ |
| 75 | struct { |
| 76 | int _band; /* POLL_IN, POLL_OUT, POLL_MSG */ |
| 77 | int _fd; |
| 78 | } _sigpoll; |
| 79 | |
| 80 | /* POSIX.1b timers */ |
| 81 | struct { |
Ralf Baechle | a982099 | 2005-02-16 21:24:16 +0000 | [diff] [blame] | 82 | timer_t _tid; /* timer id */ |
| 83 | int _overrun; /* overrun count */ |
Ralf Baechle | 209ac8d | 2005-03-18 17:36:42 +0000 | [diff] [blame] | 84 | compat_sigval_t _sigval;/* same as below */ |
Ralf Baechle | a982099 | 2005-02-16 21:24:16 +0000 | [diff] [blame] | 85 | int _sys_private; /* not to be passed to user */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | } _timer; |
| 87 | |
| 88 | /* POSIX.1b signals */ |
| 89 | struct { |
| 90 | compat_pid_t _pid; /* sender's pid */ |
| 91 | compat_uid_t _uid; /* sender's uid */ |
| 92 | compat_sigval_t _sigval; |
| 93 | } _rt; |
| 94 | |
| 95 | } _sifields; |
| 96 | } compat_siginfo_t; |
| 97 | |
| 98 | /* |
| 99 | * Including <asm/unistd.h> would give use the 64-bit syscall numbers ... |
| 100 | */ |
| 101 | #define __NR_O32_sigreturn 4119 |
| 102 | #define __NR_O32_rt_sigreturn 4193 |
| 103 | #define __NR_O32_restart_syscall 4253 |
| 104 | |
| 105 | #define DEBUG_SIG 0 |
| 106 | |
| 107 | #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) |
| 108 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | /* 32-bit compatibility types */ |
| 110 | |
| 111 | #define _NSIG_BPW32 32 |
| 112 | #define _NSIG_WORDS32 (_NSIG / _NSIG_BPW32) |
| 113 | |
| 114 | typedef struct { |
| 115 | unsigned int sig[_NSIG_WORDS32]; |
| 116 | } sigset_t32; |
| 117 | |
| 118 | typedef unsigned int __sighandler32_t; |
| 119 | typedef void (*vfptr_t)(void); |
| 120 | |
| 121 | struct sigaction32 { |
| 122 | unsigned int sa_flags; |
| 123 | __sighandler32_t sa_handler; |
| 124 | compat_sigset_t sa_mask; |
| 125 | }; |
| 126 | |
| 127 | /* IRIX compatible stack_t */ |
| 128 | typedef struct sigaltstack32 { |
| 129 | s32 ss_sp; |
| 130 | compat_size_t ss_size; |
| 131 | int ss_flags; |
| 132 | } stack32_t; |
| 133 | |
| 134 | struct ucontext32 { |
| 135 | u32 uc_flags; |
| 136 | s32 uc_link; |
| 137 | stack32_t uc_stack; |
| 138 | struct sigcontext32 uc_mcontext; |
| 139 | sigset_t32 uc_sigmask; /* mask last for extensibility */ |
| 140 | }; |
| 141 | |
| 142 | extern void __put_sigset_unknown_nsig(void); |
| 143 | extern void __get_sigset_unknown_nsig(void); |
| 144 | |
Atsushi Nemoto | 9bbf28a3 | 2006-02-01 01:41:09 +0900 | [diff] [blame] | 145 | static inline int put_sigset(const sigset_t *kbuf, compat_sigset_t __user *ubuf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | { |
| 147 | int err = 0; |
| 148 | |
| 149 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf))) |
| 150 | return -EFAULT; |
| 151 | |
| 152 | switch (_NSIG_WORDS) { |
| 153 | default: |
| 154 | __put_sigset_unknown_nsig(); |
| 155 | case 2: |
| 156 | err |= __put_user (kbuf->sig[1] >> 32, &ubuf->sig[3]); |
| 157 | err |= __put_user (kbuf->sig[1] & 0xffffffff, &ubuf->sig[2]); |
| 158 | case 1: |
| 159 | err |= __put_user (kbuf->sig[0] >> 32, &ubuf->sig[1]); |
| 160 | err |= __put_user (kbuf->sig[0] & 0xffffffff, &ubuf->sig[0]); |
| 161 | } |
| 162 | |
| 163 | return err; |
| 164 | } |
| 165 | |
| 166 | static inline int get_sigset(sigset_t *kbuf, const compat_sigset_t *ubuf) |
| 167 | { |
| 168 | int err = 0; |
| 169 | unsigned long sig[4]; |
| 170 | |
| 171 | if (!access_ok(VERIFY_READ, ubuf, sizeof(*ubuf))) |
| 172 | return -EFAULT; |
| 173 | |
| 174 | switch (_NSIG_WORDS) { |
| 175 | default: |
| 176 | __get_sigset_unknown_nsig(); |
| 177 | case 2: |
| 178 | err |= __get_user (sig[3], &ubuf->sig[3]); |
| 179 | err |= __get_user (sig[2], &ubuf->sig[2]); |
| 180 | kbuf->sig[1] = sig[2] | (sig[3] << 32); |
| 181 | case 1: |
| 182 | err |= __get_user (sig[1], &ubuf->sig[1]); |
| 183 | err |= __get_user (sig[0], &ubuf->sig[0]); |
| 184 | kbuf->sig[0] = sig[0] | (sig[1] << 32); |
| 185 | } |
| 186 | |
| 187 | return err; |
| 188 | } |
| 189 | |
| 190 | /* |
| 191 | * Atomically swap in the new signal mask, and wait for a signal. |
| 192 | */ |
| 193 | |
| 194 | save_static_function(sys32_sigsuspend); |
| 195 | __attribute_used__ noinline static int |
| 196 | _sys32_sigsuspend(nabi_no_regargs struct pt_regs regs) |
| 197 | { |
| 198 | compat_sigset_t *uset; |
Martin Michlmayr | 68fa383 | 2006-02-18 14:55:45 +0000 | [diff] [blame] | 199 | sigset_t newset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | |
| 201 | uset = (compat_sigset_t *) regs.regs[4]; |
| 202 | if (get_sigset(&newset, uset)) |
| 203 | return -EFAULT; |
| 204 | sigdelsetmask(&newset, ~_BLOCKABLE); |
| 205 | |
| 206 | spin_lock_irq(¤t->sighand->siglock); |
Martin Michlmayr | 68fa383 | 2006-02-18 14:55:45 +0000 | [diff] [blame] | 207 | current->saved_sigmask = current->blocked; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | current->blocked = newset; |
| 209 | recalc_sigpending(); |
| 210 | spin_unlock_irq(¤t->sighand->siglock); |
| 211 | |
Martin Michlmayr | 68fa383 | 2006-02-18 14:55:45 +0000 | [diff] [blame] | 212 | current->state = TASK_INTERRUPTIBLE; |
| 213 | schedule(); |
| 214 | set_thread_flag(TIF_RESTORE_SIGMASK); |
| 215 | return -ERESTARTNOHAND; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | } |
| 217 | |
| 218 | save_static_function(sys32_rt_sigsuspend); |
| 219 | __attribute_used__ noinline static int |
| 220 | _sys32_rt_sigsuspend(nabi_no_regargs struct pt_regs regs) |
| 221 | { |
| 222 | compat_sigset_t *uset; |
Martin Michlmayr | 68fa383 | 2006-02-18 14:55:45 +0000 | [diff] [blame] | 223 | sigset_t newset; |
Ralf Baechle | 304416d | 2006-02-18 18:20:47 +0000 | [diff] [blame] | 224 | size_t sigsetsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | |
| 226 | /* XXX Don't preclude handling different sized sigset_t's. */ |
| 227 | sigsetsize = regs.regs[5]; |
| 228 | if (sigsetsize != sizeof(compat_sigset_t)) |
| 229 | return -EINVAL; |
| 230 | |
| 231 | uset = (compat_sigset_t *) regs.regs[4]; |
| 232 | if (get_sigset(&newset, uset)) |
| 233 | return -EFAULT; |
| 234 | sigdelsetmask(&newset, ~_BLOCKABLE); |
| 235 | |
| 236 | spin_lock_irq(¤t->sighand->siglock); |
Martin Michlmayr | 68fa383 | 2006-02-18 14:55:45 +0000 | [diff] [blame] | 237 | current->saved_sigmask = current->blocked; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | current->blocked = newset; |
Martin Michlmayr | 6254944 | 2006-02-18 20:06:32 +0000 | [diff] [blame^] | 239 | recalc_sigpending(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | spin_unlock_irq(¤t->sighand->siglock); |
| 241 | |
Martin Michlmayr | 68fa383 | 2006-02-18 14:55:45 +0000 | [diff] [blame] | 242 | current->state = TASK_INTERRUPTIBLE; |
| 243 | schedule(); |
| 244 | set_thread_flag(TIF_RESTORE_SIGMASK); |
| 245 | return -ERESTARTNOHAND; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | } |
| 247 | |
| 248 | asmlinkage int sys32_sigaction(int sig, const struct sigaction32 *act, |
| 249 | struct sigaction32 *oact) |
| 250 | { |
| 251 | struct k_sigaction new_ka, old_ka; |
| 252 | int ret; |
| 253 | int err = 0; |
| 254 | |
| 255 | if (act) { |
| 256 | old_sigset_t mask; |
Ralf Baechle | 77c728c | 2005-03-04 19:36:51 +0000 | [diff] [blame] | 257 | s32 handler; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | |
| 259 | if (!access_ok(VERIFY_READ, act, sizeof(*act))) |
| 260 | return -EFAULT; |
Ralf Baechle | 77c728c | 2005-03-04 19:36:51 +0000 | [diff] [blame] | 261 | err |= __get_user(handler, &act->sa_handler); |
Atsushi Nemoto | 9bbf28a3 | 2006-02-01 01:41:09 +0900 | [diff] [blame] | 262 | new_ka.sa.sa_handler = (void __user *)(s64)handler; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | err |= __get_user(new_ka.sa.sa_flags, &act->sa_flags); |
| 264 | err |= __get_user(mask, &act->sa_mask.sig[0]); |
| 265 | if (err) |
| 266 | return -EFAULT; |
| 267 | |
| 268 | siginitset(&new_ka.sa.sa_mask, mask); |
| 269 | } |
| 270 | |
| 271 | ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); |
| 272 | |
| 273 | if (!ret && oact) { |
| 274 | if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact))) |
Martin Michlmayr | 6254944 | 2006-02-18 20:06:32 +0000 | [diff] [blame^] | 275 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | err |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags); |
| 277 | err |= __put_user((u32)(u64)old_ka.sa.sa_handler, |
| 278 | &oact->sa_handler); |
| 279 | err |= __put_user(old_ka.sa.sa_mask.sig[0], oact->sa_mask.sig); |
Martin Michlmayr | 6254944 | 2006-02-18 20:06:32 +0000 | [diff] [blame^] | 280 | err |= __put_user(0, &oact->sa_mask.sig[1]); |
| 281 | err |= __put_user(0, &oact->sa_mask.sig[2]); |
| 282 | err |= __put_user(0, &oact->sa_mask.sig[3]); |
| 283 | if (err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | return -EFAULT; |
| 285 | } |
| 286 | |
| 287 | return ret; |
| 288 | } |
| 289 | |
| 290 | asmlinkage int sys32_sigaltstack(nabi_no_regargs struct pt_regs regs) |
| 291 | { |
Atsushi Nemoto | 9bbf28a3 | 2006-02-01 01:41:09 +0900 | [diff] [blame] | 292 | const stack32_t __user *uss = (const stack32_t __user *) regs.regs[4]; |
| 293 | stack32_t __user *uoss = (stack32_t __user *) regs.regs[5]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | unsigned long usp = regs.regs[29]; |
| 295 | stack_t kss, koss; |
| 296 | int ret, err = 0; |
| 297 | mm_segment_t old_fs = get_fs(); |
| 298 | s32 sp; |
| 299 | |
| 300 | if (uss) { |
| 301 | if (!access_ok(VERIFY_READ, uss, sizeof(*uss))) |
| 302 | return -EFAULT; |
| 303 | err |= __get_user(sp, &uss->ss_sp); |
| 304 | kss.ss_sp = (void *) (long) sp; |
| 305 | err |= __get_user(kss.ss_size, &uss->ss_size); |
| 306 | err |= __get_user(kss.ss_flags, &uss->ss_flags); |
| 307 | if (err) |
| 308 | return -EFAULT; |
| 309 | } |
| 310 | |
| 311 | set_fs (KERNEL_DS); |
Atsushi Nemoto | 9bbf28a3 | 2006-02-01 01:41:09 +0900 | [diff] [blame] | 312 | ret = do_sigaltstack(uss ? (stack_t __user *)&kss : NULL, |
| 313 | uoss ? (stack_t __user *)&koss : NULL, usp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | set_fs (old_fs); |
| 315 | |
| 316 | if (!ret && uoss) { |
| 317 | if (!access_ok(VERIFY_WRITE, uoss, sizeof(*uoss))) |
| 318 | return -EFAULT; |
| 319 | sp = (int) (long) koss.ss_sp; |
| 320 | err |= __put_user(sp, &uoss->ss_sp); |
| 321 | err |= __put_user(koss.ss_size, &uoss->ss_size); |
| 322 | err |= __put_user(koss.ss_flags, &uoss->ss_flags); |
| 323 | if (err) |
| 324 | return -EFAULT; |
| 325 | } |
| 326 | return ret; |
| 327 | } |
| 328 | |
Atsushi Nemoto | 9bbf28a3 | 2006-02-01 01:41:09 +0900 | [diff] [blame] | 329 | static int restore_sigcontext32(struct pt_regs *regs, struct sigcontext32 __user *sc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | { |
Ralf Baechle | e50c0a8 | 2005-05-31 11:49:19 +0000 | [diff] [blame] | 331 | u32 used_math; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | int err = 0; |
Ralf Baechle | e50c0a8 | 2005-05-31 11:49:19 +0000 | [diff] [blame] | 333 | s32 treg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | |
| 335 | /* Always make any pending restarted system calls return -EINTR */ |
| 336 | current_thread_info()->restart_block.fn = do_no_restart_syscall; |
| 337 | |
| 338 | err |= __get_user(regs->cp0_epc, &sc->sc_pc); |
| 339 | err |= __get_user(regs->hi, &sc->sc_mdhi); |
| 340 | err |= __get_user(regs->lo, &sc->sc_mdlo); |
Ralf Baechle | e50c0a8 | 2005-05-31 11:49:19 +0000 | [diff] [blame] | 341 | if (cpu_has_dsp) { |
| 342 | err |= __get_user(treg, &sc->sc_hi1); mthi1(treg); |
| 343 | err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg); |
| 344 | err |= __get_user(treg, &sc->sc_hi2); mthi2(treg); |
| 345 | err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg); |
| 346 | err |= __get_user(treg, &sc->sc_hi3); mthi3(treg); |
| 347 | err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg); |
| 348 | err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK); |
| 349 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | |
| 351 | #define restore_gp_reg(i) do { \ |
| 352 | err |= __get_user(regs->regs[i], &sc->sc_regs[i]); \ |
| 353 | } while(0) |
| 354 | restore_gp_reg( 1); restore_gp_reg( 2); restore_gp_reg( 3); |
| 355 | restore_gp_reg( 4); restore_gp_reg( 5); restore_gp_reg( 6); |
| 356 | restore_gp_reg( 7); restore_gp_reg( 8); restore_gp_reg( 9); |
| 357 | restore_gp_reg(10); restore_gp_reg(11); restore_gp_reg(12); |
| 358 | restore_gp_reg(13); restore_gp_reg(14); restore_gp_reg(15); |
| 359 | restore_gp_reg(16); restore_gp_reg(17); restore_gp_reg(18); |
| 360 | restore_gp_reg(19); restore_gp_reg(20); restore_gp_reg(21); |
| 361 | restore_gp_reg(22); restore_gp_reg(23); restore_gp_reg(24); |
| 362 | restore_gp_reg(25); restore_gp_reg(26); restore_gp_reg(27); |
| 363 | restore_gp_reg(28); restore_gp_reg(29); restore_gp_reg(30); |
| 364 | restore_gp_reg(31); |
| 365 | #undef restore_gp_reg |
| 366 | |
| 367 | err |= __get_user(used_math, &sc->sc_used_math); |
| 368 | conditional_used_math(used_math); |
| 369 | |
| 370 | preempt_disable(); |
| 371 | |
| 372 | if (used_math()) { |
| 373 | /* restore fpu context if we have used it before */ |
| 374 | own_fpu(); |
| 375 | err |= restore_fp_context32(sc); |
| 376 | } else { |
| 377 | /* signal handler may have used FPU. Give it up. */ |
| 378 | lose_fpu(); |
| 379 | } |
| 380 | |
| 381 | preempt_enable(); |
| 382 | |
| 383 | return err; |
| 384 | } |
| 385 | |
| 386 | struct sigframe { |
| 387 | u32 sf_ass[4]; /* argument save space for o32 */ |
Ralf Baechle | 02416dc | 2005-06-15 13:00:12 +0000 | [diff] [blame] | 388 | #if ICACHE_REFILLS_WORKAROUND_WAR |
| 389 | u32 sf_pad[2]; |
| 390 | #else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | u32 sf_code[2]; /* signal trampoline */ |
Ralf Baechle | 02416dc | 2005-06-15 13:00:12 +0000 | [diff] [blame] | 392 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | struct sigcontext32 sf_sc; |
| 394 | sigset_t sf_mask; |
Ralf Baechle | 02416dc | 2005-06-15 13:00:12 +0000 | [diff] [blame] | 395 | #if ICACHE_REFILLS_WORKAROUND_WAR |
| 396 | u32 sf_code[8] ____cacheline_aligned; /* signal trampoline */ |
| 397 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | }; |
| 399 | |
| 400 | struct rt_sigframe32 { |
| 401 | u32 rs_ass[4]; /* argument save space for o32 */ |
Ralf Baechle | 02416dc | 2005-06-15 13:00:12 +0000 | [diff] [blame] | 402 | #if ICACHE_REFILLS_WORKAROUND_WAR |
| 403 | u32 rs_pad[2]; |
| 404 | #else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | u32 rs_code[2]; /* signal trampoline */ |
Ralf Baechle | 02416dc | 2005-06-15 13:00:12 +0000 | [diff] [blame] | 406 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | compat_siginfo_t rs_info; |
| 408 | struct ucontext32 rs_uc; |
Ralf Baechle | 02416dc | 2005-06-15 13:00:12 +0000 | [diff] [blame] | 409 | #if ICACHE_REFILLS_WORKAROUND_WAR |
| 410 | u32 rs_code[8] __attribute__((aligned(32))); /* signal trampoline */ |
| 411 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | }; |
| 413 | |
Atsushi Nemoto | 9bbf28a3 | 2006-02-01 01:41:09 +0900 | [diff] [blame] | 414 | int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | { |
| 416 | int err; |
| 417 | |
| 418 | if (!access_ok (VERIFY_WRITE, to, sizeof(compat_siginfo_t))) |
| 419 | return -EFAULT; |
| 420 | |
| 421 | /* If you change siginfo_t structure, please be sure |
| 422 | this code is fixed accordingly. |
| 423 | It should never copy any pad contained in the structure |
| 424 | to avoid security leaks, but must copy the generic |
| 425 | 3 ints plus the relevant union member. |
| 426 | This routine must convert siginfo from 64bit to 32bit as well |
| 427 | at the same time. */ |
| 428 | err = __put_user(from->si_signo, &to->si_signo); |
| 429 | err |= __put_user(from->si_errno, &to->si_errno); |
| 430 | err |= __put_user((short)from->si_code, &to->si_code); |
| 431 | if (from->si_code < 0) |
| 432 | err |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE); |
| 433 | else { |
| 434 | switch (from->si_code >> 16) { |
Ralf Baechle | a982099 | 2005-02-16 21:24:16 +0000 | [diff] [blame] | 435 | case __SI_TIMER >> 16: |
| 436 | err |= __put_user(from->si_tid, &to->si_tid); |
| 437 | err |= __put_user(from->si_overrun, &to->si_overrun); |
| 438 | err |= __put_user(from->si_int, &to->si_int); |
| 439 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | case __SI_CHLD >> 16: |
| 441 | err |= __put_user(from->si_utime, &to->si_utime); |
| 442 | err |= __put_user(from->si_stime, &to->si_stime); |
| 443 | err |= __put_user(from->si_status, &to->si_status); |
| 444 | default: |
| 445 | err |= __put_user(from->si_pid, &to->si_pid); |
| 446 | err |= __put_user(from->si_uid, &to->si_uid); |
| 447 | break; |
| 448 | case __SI_FAULT >> 16: |
Atsushi Nemoto | 5665a0a | 2006-02-02 01:26:34 +0900 | [diff] [blame] | 449 | err |= __put_user((unsigned long)from->si_addr, &to->si_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | break; |
| 451 | case __SI_POLL >> 16: |
| 452 | err |= __put_user(from->si_band, &to->si_band); |
| 453 | err |= __put_user(from->si_fd, &to->si_fd); |
| 454 | break; |
| 455 | case __SI_RT >> 16: /* This is not generated by the kernel as of now. */ |
| 456 | case __SI_MESGQ >> 16: |
| 457 | err |= __put_user(from->si_pid, &to->si_pid); |
| 458 | err |= __put_user(from->si_uid, &to->si_uid); |
| 459 | err |= __put_user(from->si_int, &to->si_int); |
| 460 | break; |
| 461 | } |
| 462 | } |
| 463 | return err; |
| 464 | } |
| 465 | |
| 466 | save_static_function(sys32_sigreturn); |
| 467 | __attribute_used__ noinline static void |
| 468 | _sys32_sigreturn(nabi_no_regargs struct pt_regs regs) |
| 469 | { |
Atsushi Nemoto | 9bbf28a3 | 2006-02-01 01:41:09 +0900 | [diff] [blame] | 470 | struct sigframe __user *frame; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | sigset_t blocked; |
| 472 | |
Atsushi Nemoto | 9bbf28a3 | 2006-02-01 01:41:09 +0900 | [diff] [blame] | 473 | frame = (struct sigframe __user *) regs.regs[29]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) |
| 475 | goto badframe; |
| 476 | if (__copy_from_user(&blocked, &frame->sf_mask, sizeof(blocked))) |
| 477 | goto badframe; |
| 478 | |
| 479 | sigdelsetmask(&blocked, ~_BLOCKABLE); |
| 480 | spin_lock_irq(¤t->sighand->siglock); |
| 481 | current->blocked = blocked; |
| 482 | recalc_sigpending(); |
| 483 | spin_unlock_irq(¤t->sighand->siglock); |
| 484 | |
| 485 | if (restore_sigcontext32(®s, &frame->sf_sc)) |
| 486 | goto badframe; |
| 487 | |
| 488 | /* |
| 489 | * Don't let your children do this ... |
| 490 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | __asm__ __volatile__( |
| 492 | "move\t$29, %0\n\t" |
| 493 | "j\tsyscall_exit" |
| 494 | :/* no outputs */ |
| 495 | :"r" (®s)); |
| 496 | /* Unreached */ |
| 497 | |
| 498 | badframe: |
| 499 | force_sig(SIGSEGV, current); |
| 500 | } |
| 501 | |
| 502 | save_static_function(sys32_rt_sigreturn); |
| 503 | __attribute_used__ noinline static void |
| 504 | _sys32_rt_sigreturn(nabi_no_regargs struct pt_regs regs) |
| 505 | { |
Atsushi Nemoto | 9bbf28a3 | 2006-02-01 01:41:09 +0900 | [diff] [blame] | 506 | struct rt_sigframe32 __user *frame; |
Ralf Baechle | 1fcf1cc | 2005-04-13 18:18:04 +0000 | [diff] [blame] | 507 | mm_segment_t old_fs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | sigset_t set; |
| 509 | stack_t st; |
| 510 | s32 sp; |
| 511 | |
Atsushi Nemoto | 9bbf28a3 | 2006-02-01 01:41:09 +0900 | [diff] [blame] | 512 | frame = (struct rt_sigframe32 __user *) regs.regs[29]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) |
| 514 | goto badframe; |
| 515 | if (__copy_from_user(&set, &frame->rs_uc.uc_sigmask, sizeof(set))) |
| 516 | goto badframe; |
| 517 | |
| 518 | sigdelsetmask(&set, ~_BLOCKABLE); |
| 519 | spin_lock_irq(¤t->sighand->siglock); |
| 520 | current->blocked = set; |
| 521 | recalc_sigpending(); |
| 522 | spin_unlock_irq(¤t->sighand->siglock); |
| 523 | |
| 524 | if (restore_sigcontext32(®s, &frame->rs_uc.uc_mcontext)) |
| 525 | goto badframe; |
| 526 | |
| 527 | /* The ucontext contains a stack32_t, so we must convert! */ |
| 528 | if (__get_user(sp, &frame->rs_uc.uc_stack.ss_sp)) |
| 529 | goto badframe; |
Atsushi Nemoto | 4cbf876 | 2006-02-14 22:40:45 +0900 | [diff] [blame] | 530 | st.ss_sp = (void *)(long) sp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | if (__get_user(st.ss_size, &frame->rs_uc.uc_stack.ss_size)) |
| 532 | goto badframe; |
| 533 | if (__get_user(st.ss_flags, &frame->rs_uc.uc_stack.ss_flags)) |
| 534 | goto badframe; |
| 535 | |
| 536 | /* It is more difficult to avoid calling this function than to |
| 537 | call it and ignore errors. */ |
Ralf Baechle | 1fcf1cc | 2005-04-13 18:18:04 +0000 | [diff] [blame] | 538 | old_fs = get_fs(); |
| 539 | set_fs (KERNEL_DS); |
Atsushi Nemoto | 9bbf28a3 | 2006-02-01 01:41:09 +0900 | [diff] [blame] | 540 | do_sigaltstack((stack_t __user *)&st, NULL, regs.regs[29]); |
Ralf Baechle | 1fcf1cc | 2005-04-13 18:18:04 +0000 | [diff] [blame] | 541 | set_fs (old_fs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | |
| 543 | /* |
| 544 | * Don't let your children do this ... |
| 545 | */ |
| 546 | __asm__ __volatile__( |
| 547 | "move\t$29, %0\n\t" |
| 548 | "j\tsyscall_exit" |
| 549 | :/* no outputs */ |
| 550 | :"r" (®s)); |
| 551 | /* Unreached */ |
| 552 | |
| 553 | badframe: |
| 554 | force_sig(SIGSEGV, current); |
| 555 | } |
| 556 | |
| 557 | static inline int setup_sigcontext32(struct pt_regs *regs, |
Atsushi Nemoto | 9bbf28a3 | 2006-02-01 01:41:09 +0900 | [diff] [blame] | 558 | struct sigcontext32 __user *sc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | { |
| 560 | int err = 0; |
| 561 | |
| 562 | err |= __put_user(regs->cp0_epc, &sc->sc_pc); |
| 563 | err |= __put_user(regs->cp0_status, &sc->sc_status); |
| 564 | |
| 565 | #define save_gp_reg(i) { \ |
| 566 | err |= __put_user(regs->regs[i], &sc->sc_regs[i]); \ |
| 567 | } while(0) |
| 568 | __put_user(0, &sc->sc_regs[0]); save_gp_reg(1); save_gp_reg(2); |
| 569 | save_gp_reg(3); save_gp_reg(4); save_gp_reg(5); save_gp_reg(6); |
| 570 | save_gp_reg(7); save_gp_reg(8); save_gp_reg(9); save_gp_reg(10); |
| 571 | save_gp_reg(11); save_gp_reg(12); save_gp_reg(13); save_gp_reg(14); |
| 572 | save_gp_reg(15); save_gp_reg(16); save_gp_reg(17); save_gp_reg(18); |
| 573 | save_gp_reg(19); save_gp_reg(20); save_gp_reg(21); save_gp_reg(22); |
| 574 | save_gp_reg(23); save_gp_reg(24); save_gp_reg(25); save_gp_reg(26); |
| 575 | save_gp_reg(27); save_gp_reg(28); save_gp_reg(29); save_gp_reg(30); |
| 576 | save_gp_reg(31); |
| 577 | #undef save_gp_reg |
| 578 | |
| 579 | err |= __put_user(regs->hi, &sc->sc_mdhi); |
| 580 | err |= __put_user(regs->lo, &sc->sc_mdlo); |
Ralf Baechle | e50c0a8 | 2005-05-31 11:49:19 +0000 | [diff] [blame] | 581 | if (cpu_has_dsp) { |
Ralf Baechle | c4fa634 | 2005-12-07 17:50:48 +0000 | [diff] [blame] | 582 | err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp); |
Ralf Baechle | e50c0a8 | 2005-05-31 11:49:19 +0000 | [diff] [blame] | 583 | err |= __put_user(mfhi1(), &sc->sc_hi1); |
| 584 | err |= __put_user(mflo1(), &sc->sc_lo1); |
| 585 | err |= __put_user(mfhi2(), &sc->sc_hi2); |
| 586 | err |= __put_user(mflo2(), &sc->sc_lo2); |
| 587 | err |= __put_user(mfhi3(), &sc->sc_hi3); |
| 588 | err |= __put_user(mflo3(), &sc->sc_lo3); |
| 589 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | |
| 591 | err |= __put_user(!!used_math(), &sc->sc_used_math); |
| 592 | |
| 593 | if (!used_math()) |
| 594 | goto out; |
| 595 | |
Ralf Baechle | 42a3b4f | 2005-09-03 15:56:17 -0700 | [diff] [blame] | 596 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | * Save FPU state to signal context. Signal handler will "inherit" |
| 598 | * current FPU state. |
| 599 | */ |
| 600 | preempt_disable(); |
| 601 | |
| 602 | if (!is_fpu_owner()) { |
| 603 | own_fpu(); |
| 604 | restore_fp(current); |
| 605 | } |
| 606 | err |= save_fp_context32(sc); |
| 607 | |
| 608 | preempt_enable(); |
| 609 | |
| 610 | out: |
| 611 | return err; |
| 612 | } |
| 613 | |
| 614 | /* |
| 615 | * Determine which stack to use.. |
| 616 | */ |
Atsushi Nemoto | 9bbf28a3 | 2006-02-01 01:41:09 +0900 | [diff] [blame] | 617 | static inline void __user *get_sigframe(struct k_sigaction *ka, |
| 618 | struct pt_regs *regs, |
| 619 | size_t frame_size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | { |
| 621 | unsigned long sp; |
| 622 | |
| 623 | /* Default to using normal stack */ |
| 624 | sp = regs->regs[29]; |
| 625 | |
| 626 | /* |
| 627 | * FPU emulator may have it's own trampoline active just |
| 628 | * above the user stack, 16-bytes before the next lowest |
| 629 | * 16 byte boundary. Try to avoid trashing it. |
| 630 | */ |
| 631 | sp -= 32; |
| 632 | |
| 633 | /* This is the X/Open sanctioned signal stack switching. */ |
| 634 | if ((ka->sa.sa_flags & SA_ONSTACK) && (sas_ss_flags (sp) == 0)) |
| 635 | sp = current->sas_ss_sp + current->sas_ss_size; |
| 636 | |
Atsushi Nemoto | 9bbf28a3 | 2006-02-01 01:41:09 +0900 | [diff] [blame] | 637 | return (void __user *)((sp - frame_size) & ALMASK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | } |
| 639 | |
Atsushi Nemoto | 16cd395 | 2005-11-05 23:00:58 +0900 | [diff] [blame] | 640 | int setup_frame_32(struct k_sigaction * ka, struct pt_regs *regs, |
| 641 | int signr, sigset_t *set) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | { |
Atsushi Nemoto | 9bbf28a3 | 2006-02-01 01:41:09 +0900 | [diff] [blame] | 643 | struct sigframe __user *frame; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | int err = 0; |
| 645 | |
| 646 | frame = get_sigframe(ka, regs, sizeof(*frame)); |
| 647 | if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame))) |
| 648 | goto give_sigsegv; |
| 649 | |
| 650 | /* |
| 651 | * Set up the return code ... |
| 652 | * |
| 653 | * li v0, __NR_O32_sigreturn |
| 654 | * syscall |
| 655 | */ |
| 656 | err |= __put_user(0x24020000 + __NR_O32_sigreturn, frame->sf_code + 0); |
| 657 | err |= __put_user(0x0000000c , frame->sf_code + 1); |
| 658 | flush_cache_sigtramp((unsigned long) frame->sf_code); |
| 659 | |
| 660 | err |= setup_sigcontext32(regs, &frame->sf_sc); |
| 661 | err |= __copy_to_user(&frame->sf_mask, set, sizeof(*set)); |
| 662 | if (err) |
| 663 | goto give_sigsegv; |
| 664 | |
| 665 | /* |
| 666 | * Arguments to signal handler: |
| 667 | * |
| 668 | * a0 = signal number |
| 669 | * a1 = 0 (should be cause) |
| 670 | * a2 = pointer to struct sigcontext |
| 671 | * |
| 672 | * $25 and c0_epc point to the signal handler, $29 points to the |
| 673 | * struct sigframe. |
| 674 | */ |
| 675 | regs->regs[ 4] = signr; |
| 676 | regs->regs[ 5] = 0; |
| 677 | regs->regs[ 6] = (unsigned long) &frame->sf_sc; |
| 678 | regs->regs[29] = (unsigned long) frame; |
| 679 | regs->regs[31] = (unsigned long) frame->sf_code; |
| 680 | regs->cp0_epc = regs->regs[25] = (unsigned long) ka->sa.sa_handler; |
| 681 | |
| 682 | #if DEBUG_SIG |
| 683 | printk("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%p\n", |
| 684 | current->comm, current->pid, |
| 685 | frame, regs->cp0_epc, frame->sf_code); |
| 686 | #endif |
Ralf Baechle | 7b3e2fc | 2006-02-08 12:58:41 +0000 | [diff] [blame] | 687 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | |
| 689 | give_sigsegv: |
| 690 | force_sigsegv(signr, current); |
Ralf Baechle | 7b3e2fc | 2006-02-08 12:58:41 +0000 | [diff] [blame] | 691 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | } |
| 693 | |
Atsushi Nemoto | 16cd395 | 2005-11-05 23:00:58 +0900 | [diff] [blame] | 694 | int setup_rt_frame_32(struct k_sigaction * ka, struct pt_regs *regs, |
| 695 | int signr, sigset_t *set, siginfo_t *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | { |
Atsushi Nemoto | 9bbf28a3 | 2006-02-01 01:41:09 +0900 | [diff] [blame] | 697 | struct rt_sigframe32 __user *frame; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | int err = 0; |
| 699 | s32 sp; |
| 700 | |
| 701 | frame = get_sigframe(ka, regs, sizeof(*frame)); |
| 702 | if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame))) |
| 703 | goto give_sigsegv; |
| 704 | |
| 705 | /* Set up to return from userspace. If provided, use a stub already |
| 706 | in userspace. */ |
| 707 | /* |
| 708 | * Set up the return code ... |
| 709 | * |
| 710 | * li v0, __NR_O32_rt_sigreturn |
| 711 | * syscall |
| 712 | */ |
| 713 | err |= __put_user(0x24020000 + __NR_O32_rt_sigreturn, frame->rs_code + 0); |
| 714 | err |= __put_user(0x0000000c , frame->rs_code + 1); |
| 715 | flush_cache_sigtramp((unsigned long) frame->rs_code); |
| 716 | |
| 717 | /* Convert (siginfo_t -> compat_siginfo_t) and copy to user. */ |
| 718 | err |= copy_siginfo_to_user32(&frame->rs_info, info); |
| 719 | |
| 720 | /* Create the ucontext. */ |
| 721 | err |= __put_user(0, &frame->rs_uc.uc_flags); |
| 722 | err |= __put_user(0, &frame->rs_uc.uc_link); |
| 723 | sp = (int) (long) current->sas_ss_sp; |
| 724 | err |= __put_user(sp, |
| 725 | &frame->rs_uc.uc_stack.ss_sp); |
| 726 | err |= __put_user(sas_ss_flags(regs->regs[29]), |
| 727 | &frame->rs_uc.uc_stack.ss_flags); |
| 728 | err |= __put_user(current->sas_ss_size, |
| 729 | &frame->rs_uc.uc_stack.ss_size); |
| 730 | err |= setup_sigcontext32(regs, &frame->rs_uc.uc_mcontext); |
| 731 | err |= __copy_to_user(&frame->rs_uc.uc_sigmask, set, sizeof(*set)); |
| 732 | |
| 733 | if (err) |
| 734 | goto give_sigsegv; |
| 735 | |
| 736 | /* |
| 737 | * Arguments to signal handler: |
| 738 | * |
| 739 | * a0 = signal number |
| 740 | * a1 = 0 (should be cause) |
| 741 | * a2 = pointer to ucontext |
| 742 | * |
| 743 | * $25 and c0_epc point to the signal handler, $29 points to |
| 744 | * the struct rt_sigframe32. |
| 745 | */ |
| 746 | regs->regs[ 4] = signr; |
| 747 | regs->regs[ 5] = (unsigned long) &frame->rs_info; |
| 748 | regs->regs[ 6] = (unsigned long) &frame->rs_uc; |
| 749 | regs->regs[29] = (unsigned long) frame; |
| 750 | regs->regs[31] = (unsigned long) frame->rs_code; |
| 751 | regs->cp0_epc = regs->regs[25] = (unsigned long) ka->sa.sa_handler; |
| 752 | |
| 753 | #if DEBUG_SIG |
| 754 | printk("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%p\n", |
| 755 | current->comm, current->pid, |
| 756 | frame, regs->cp0_epc, frame->rs_code); |
| 757 | #endif |
Ralf Baechle | 7b3e2fc | 2006-02-08 12:58:41 +0000 | [diff] [blame] | 758 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | |
| 760 | give_sigsegv: |
| 761 | force_sigsegv(signr, current); |
Ralf Baechle | 7b3e2fc | 2006-02-08 12:58:41 +0000 | [diff] [blame] | 762 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | } |
| 764 | |
Ralf Baechle | 129bc8f | 2005-07-11 20:45:51 +0000 | [diff] [blame] | 765 | static inline int handle_signal(unsigned long sig, siginfo_t *info, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | struct k_sigaction *ka, sigset_t *oldset, struct pt_regs * regs) |
| 767 | { |
Ralf Baechle | 129bc8f | 2005-07-11 20:45:51 +0000 | [diff] [blame] | 768 | int ret; |
| 769 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | switch (regs->regs[0]) { |
| 771 | case ERESTART_RESTARTBLOCK: |
| 772 | case ERESTARTNOHAND: |
| 773 | regs->regs[2] = EINTR; |
| 774 | break; |
| 775 | case ERESTARTSYS: |
Martin Michlmayr | 68fa383 | 2006-02-18 14:55:45 +0000 | [diff] [blame] | 776 | if (!(ka->sa.sa_flags & SA_RESTART)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | regs->regs[2] = EINTR; |
| 778 | break; |
| 779 | } |
| 780 | /* fallthrough */ |
| 781 | case ERESTARTNOINTR: /* Userland will reload $v0. */ |
| 782 | regs->regs[7] = regs->regs[26]; |
| 783 | regs->cp0_epc -= 8; |
| 784 | } |
| 785 | |
| 786 | regs->regs[0] = 0; /* Don't deal with this again. */ |
| 787 | |
| 788 | if (ka->sa.sa_flags & SA_SIGINFO) |
Ralf Baechle | 129bc8f | 2005-07-11 20:45:51 +0000 | [diff] [blame] | 789 | ret = current->thread.abi->setup_rt_frame(ka, regs, sig, oldset, info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | else |
Ralf Baechle | 129bc8f | 2005-07-11 20:45:51 +0000 | [diff] [blame] | 791 | ret = current->thread.abi->setup_frame(ka, regs, sig, oldset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | |
Steven Rostedt | 69be8f1 | 2005-08-29 11:44:09 -0400 | [diff] [blame] | 793 | spin_lock_irq(¤t->sighand->siglock); |
| 794 | sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask); |
| 795 | if (!(ka->sa.sa_flags & SA_NODEFER)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | sigaddset(¤t->blocked,sig); |
Steven Rostedt | 69be8f1 | 2005-08-29 11:44:09 -0400 | [diff] [blame] | 797 | recalc_sigpending(); |
| 798 | spin_unlock_irq(¤t->sighand->siglock); |
Ralf Baechle | 129bc8f | 2005-07-11 20:45:51 +0000 | [diff] [blame] | 799 | |
| 800 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | } |
| 802 | |
Martin Michlmayr | dda73d0 | 2006-02-18 15:21:30 +0000 | [diff] [blame] | 803 | void do_signal32(struct pt_regs *regs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | { |
| 805 | struct k_sigaction ka; |
Martin Michlmayr | 68fa383 | 2006-02-18 14:55:45 +0000 | [diff] [blame] | 806 | sigset_t *oldset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | siginfo_t info; |
| 808 | int signr; |
| 809 | |
| 810 | /* |
| 811 | * We want the common case to go fast, which is why we may in certain |
| 812 | * cases get here from kernel mode. Just return without doing anything |
| 813 | * if so. |
| 814 | */ |
| 815 | if (!user_mode(regs)) |
Martin Michlmayr | dda73d0 | 2006-02-18 15:21:30 +0000 | [diff] [blame] | 816 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | |
Nigel Cunningham | 0e6c1f5 | 2005-07-27 11:43:34 -0700 | [diff] [blame] | 818 | if (try_to_freeze()) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | goto no_signal; |
| 820 | |
Martin Michlmayr | 68fa383 | 2006-02-18 14:55:45 +0000 | [diff] [blame] | 821 | if (test_thread_flag(TIF_RESTORE_SIGMASK)) |
| 822 | oldset = ¤t->saved_sigmask; |
| 823 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | oldset = ¤t->blocked; |
| 825 | |
| 826 | signr = get_signal_to_deliver(&info, &ka, regs, NULL); |
Martin Michlmayr | 68fa383 | 2006-02-18 14:55:45 +0000 | [diff] [blame] | 827 | if (signr > 0) { |
| 828 | /* Whee! Actually deliver the signal. */ |
| 829 | if (handle_signal(signr, &info, &ka, oldset, regs) == 0) { |
| 830 | /* |
| 831 | * A signal was successfully delivered; the saved |
| 832 | * sigmask will have been stored in the signal frame, |
| 833 | * and will be restored by sigreturn, so we can simply |
| 834 | * clear the TIF_RESTORE_SIGMASK flag. |
| 835 | */ |
| 836 | if (test_thread_flag(TIF_RESTORE_SIGMASK)) |
| 837 | clear_thread_flag(TIF_RESTORE_SIGMASK); |
| 838 | } |
| 839 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | |
| 841 | no_signal: |
| 842 | /* |
| 843 | * Who's code doesn't conform to the restartable syscall convention |
| 844 | * dies here!!! The li instruction, a single machine instruction, |
| 845 | * must directly be followed by the syscall instruction. |
| 846 | */ |
| 847 | if (regs->regs[0]) { |
| 848 | if (regs->regs[2] == ERESTARTNOHAND || |
| 849 | regs->regs[2] == ERESTARTSYS || |
| 850 | regs->regs[2] == ERESTARTNOINTR) { |
| 851 | regs->regs[7] = regs->regs[26]; |
| 852 | regs->cp0_epc -= 8; |
| 853 | } |
| 854 | if (regs->regs[2] == ERESTART_RESTARTBLOCK) { |
| 855 | regs->regs[2] = __NR_O32_restart_syscall; |
| 856 | regs->regs[7] = regs->regs[26]; |
| 857 | regs->cp0_epc -= 4; |
| 858 | } |
| 859 | } |
Martin Michlmayr | 68fa383 | 2006-02-18 14:55:45 +0000 | [diff] [blame] | 860 | |
| 861 | /* |
| 862 | * If there's no signal to deliver, we just put the saved sigmask |
| 863 | * back |
| 864 | */ |
| 865 | if (test_thread_flag(TIF_RESTORE_SIGMASK)) { |
| 866 | clear_thread_flag(TIF_RESTORE_SIGMASK); |
| 867 | sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL); |
| 868 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | } |
| 870 | |
| 871 | asmlinkage int sys32_rt_sigaction(int sig, const struct sigaction32 *act, |
Atsushi Nemoto | 9bbf28a3 | 2006-02-01 01:41:09 +0900 | [diff] [blame] | 872 | struct sigaction32 __user *oact, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | unsigned int sigsetsize) |
| 874 | { |
| 875 | struct k_sigaction new_sa, old_sa; |
| 876 | int ret = -EINVAL; |
| 877 | |
| 878 | /* XXX: Don't preclude handling different sized sigset_t's. */ |
| 879 | if (sigsetsize != sizeof(sigset_t)) |
| 880 | goto out; |
| 881 | |
| 882 | if (act) { |
Ralf Baechle | 77c728c | 2005-03-04 19:36:51 +0000 | [diff] [blame] | 883 | s32 handler; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | int err = 0; |
| 885 | |
| 886 | if (!access_ok(VERIFY_READ, act, sizeof(*act))) |
| 887 | return -EFAULT; |
Ralf Baechle | 77c728c | 2005-03-04 19:36:51 +0000 | [diff] [blame] | 888 | err |= __get_user(handler, &act->sa_handler); |
Atsushi Nemoto | 9bbf28a3 | 2006-02-01 01:41:09 +0900 | [diff] [blame] | 889 | new_sa.sa.sa_handler = (void __user *)(s64)handler; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | err |= __get_user(new_sa.sa.sa_flags, &act->sa_flags); |
| 891 | err |= get_sigset(&new_sa.sa.sa_mask, &act->sa_mask); |
| 892 | if (err) |
| 893 | return -EFAULT; |
| 894 | } |
| 895 | |
| 896 | ret = do_sigaction(sig, act ? &new_sa : NULL, oact ? &old_sa : NULL); |
| 897 | |
| 898 | if (!ret && oact) { |
| 899 | int err = 0; |
| 900 | |
| 901 | if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact))) |
| 902 | return -EFAULT; |
| 903 | |
| 904 | err |= __put_user((u32)(u64)old_sa.sa.sa_handler, |
| 905 | &oact->sa_handler); |
| 906 | err |= __put_user(old_sa.sa.sa_flags, &oact->sa_flags); |
| 907 | err |= put_sigset(&old_sa.sa.sa_mask, &oact->sa_mask); |
| 908 | if (err) |
| 909 | return -EFAULT; |
| 910 | } |
| 911 | out: |
| 912 | return ret; |
| 913 | } |
| 914 | |
| 915 | asmlinkage int sys32_rt_sigprocmask(int how, compat_sigset_t *set, |
Atsushi Nemoto | 9bbf28a3 | 2006-02-01 01:41:09 +0900 | [diff] [blame] | 916 | compat_sigset_t __user *oset, unsigned int sigsetsize) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | { |
| 918 | sigset_t old_set, new_set; |
| 919 | int ret; |
| 920 | mm_segment_t old_fs = get_fs(); |
| 921 | |
| 922 | if (set && get_sigset(&new_set, set)) |
| 923 | return -EFAULT; |
| 924 | |
| 925 | set_fs (KERNEL_DS); |
Atsushi Nemoto | 9bbf28a3 | 2006-02-01 01:41:09 +0900 | [diff] [blame] | 926 | ret = sys_rt_sigprocmask(how, set ? (sigset_t __user *)&new_set : NULL, |
| 927 | oset ? (sigset_t __user *)&old_set : NULL, |
| 928 | sigsetsize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | set_fs (old_fs); |
| 930 | |
| 931 | if (!ret && oset && put_sigset(&old_set, oset)) |
| 932 | return -EFAULT; |
| 933 | |
| 934 | return ret; |
| 935 | } |
| 936 | |
Atsushi Nemoto | 9bbf28a3 | 2006-02-01 01:41:09 +0900 | [diff] [blame] | 937 | asmlinkage int sys32_rt_sigpending(compat_sigset_t __user *uset, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | unsigned int sigsetsize) |
| 939 | { |
| 940 | int ret; |
| 941 | sigset_t set; |
| 942 | mm_segment_t old_fs = get_fs(); |
| 943 | |
| 944 | set_fs (KERNEL_DS); |
Atsushi Nemoto | 9bbf28a3 | 2006-02-01 01:41:09 +0900 | [diff] [blame] | 945 | ret = sys_rt_sigpending((sigset_t __user *)&set, sigsetsize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | set_fs (old_fs); |
| 947 | |
| 948 | if (!ret && put_sigset(&set, uset)) |
| 949 | return -EFAULT; |
| 950 | |
| 951 | return ret; |
| 952 | } |
| 953 | |
Atsushi Nemoto | 9bbf28a3 | 2006-02-01 01:41:09 +0900 | [diff] [blame] | 954 | asmlinkage int sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 955 | { |
| 956 | siginfo_t info; |
| 957 | int ret; |
| 958 | mm_segment_t old_fs = get_fs(); |
| 959 | |
| 960 | if (copy_from_user (&info, uinfo, 3*sizeof(int)) || |
| 961 | copy_from_user (info._sifields._pad, uinfo->_sifields._pad, SI_PAD_SIZE)) |
| 962 | return -EFAULT; |
| 963 | set_fs (KERNEL_DS); |
Atsushi Nemoto | 9bbf28a3 | 2006-02-01 01:41:09 +0900 | [diff] [blame] | 964 | ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *)&info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 965 | set_fs (old_fs); |
| 966 | return ret; |
| 967 | } |
Ralf Baechle | 54f2da7 | 2005-02-16 21:21:29 +0000 | [diff] [blame] | 968 | |
| 969 | asmlinkage long |
| 970 | sys32_waitid(int which, compat_pid_t pid, |
| 971 | compat_siginfo_t __user *uinfo, int options, |
| 972 | struct compat_rusage __user *uru) |
| 973 | { |
| 974 | siginfo_t info; |
| 975 | struct rusage ru; |
| 976 | long ret; |
| 977 | mm_segment_t old_fs = get_fs(); |
| 978 | |
| 979 | info.si_signo = 0; |
| 980 | set_fs (KERNEL_DS); |
| 981 | ret = sys_waitid(which, pid, (siginfo_t __user *) &info, options, |
| 982 | uru ? (struct rusage __user *) &ru : NULL); |
| 983 | set_fs (old_fs); |
| 984 | |
| 985 | if (ret < 0 || info.si_signo == 0) |
| 986 | return ret; |
| 987 | |
| 988 | if (uru && (ret = put_compat_rusage(&ru, uru))) |
| 989 | return ret; |
| 990 | |
| 991 | BUG_ON(info.si_code & __SI_MASK); |
| 992 | info.si_code |= __SI_CHLD; |
| 993 | return copy_siginfo_to_user32(uinfo, &info); |
| 994 | } |