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> |
Ralf Baechle | 431dc80 | 2007-02-13 00:05:11 +0000 | [diff] [blame] | 11 | #include <linux/compat.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include <linux/sched.h> |
| 13 | #include <linux/mm.h> |
| 14 | #include <linux/smp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include <linux/suspend.h> |
| 22 | #include <linux/compiler.h> |
Atsushi Nemoto | faea623 | 2007-04-16 23:19:44 +0900 | [diff] [blame] | 23 | #include <linux/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Ralf Baechle | 431dc80 | 2007-02-13 00:05:11 +0000 | [diff] [blame] | 27 | #include <asm/compat-signal.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <linux/bitops.h> |
| 29 | #include <asm/cacheflush.h> |
| 30 | #include <asm/sim.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <asm/ucontext.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <asm/fpu.h> |
Ralf Baechle | 02416dc | 2005-06-15 13:00:12 +0000 | [diff] [blame] | 33 | #include <asm/war.h> |
David Howells | b81947c | 2012-03-28 18:30:02 +0100 | [diff] [blame] | 34 | #include <asm/dsp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
Franck Bui-Huu | 36a1f2c2 | 2007-02-05 15:24:22 +0100 | [diff] [blame] | 36 | #include "signal-common.h" |
| 37 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | /* |
| 39 | * Including <asm/unistd.h> would give use the 64-bit syscall numbers ... |
| 40 | */ |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 41 | #define __NR_O32_restart_syscall 4253 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | /* 32-bit compatibility types */ |
| 44 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | typedef unsigned int __sighandler32_t; |
| 46 | typedef void (*vfptr_t)(void); |
| 47 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | struct ucontext32 { |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 49 | u32 uc_flags; |
| 50 | s32 uc_link; |
Al Viro | ea536ad | 2012-12-23 03:13:40 -0500 | [diff] [blame] | 51 | compat_stack_t uc_stack; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | struct sigcontext32 uc_mcontext; |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 53 | compat_sigset_t uc_sigmask; /* mask last for extensibility */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | }; |
| 55 | |
Ralf Baechle | dd02f06 | 2007-02-13 00:50:57 +0000 | [diff] [blame] | 56 | struct sigframe32 { |
| 57 | u32 sf_ass[4]; /* argument save space for o32 */ |
David Daney | d814c28 | 2010-02-18 16:13:05 -0800 | [diff] [blame] | 58 | u32 sf_pad[2]; /* Was: signal trampoline */ |
Ralf Baechle | dd02f06 | 2007-02-13 00:50:57 +0000 | [diff] [blame] | 59 | struct sigcontext32 sf_sc; |
Atsushi Nemoto | 755f21b | 2007-02-14 14:41:01 +0900 | [diff] [blame] | 60 | compat_sigset_t sf_mask; |
Ralf Baechle | dd02f06 | 2007-02-13 00:50:57 +0000 | [diff] [blame] | 61 | }; |
| 62 | |
Franck Bui-Huu | c0b9bae | 2007-02-05 15:24:21 +0100 | [diff] [blame] | 63 | struct rt_sigframe32 { |
| 64 | u32 rs_ass[4]; /* argument save space for o32 */ |
David Daney | d814c28 | 2010-02-18 16:13:05 -0800 | [diff] [blame] | 65 | u32 rs_pad[2]; /* Was: signal trampoline */ |
Franck Bui-Huu | c0b9bae | 2007-02-05 15:24:21 +0100 | [diff] [blame] | 66 | compat_siginfo_t rs_info; |
| 67 | struct ucontext32 rs_uc; |
| 68 | }; |
| 69 | |
Franck Bui-Huu | 9432a9b | 2007-02-05 15:24:25 +0100 | [diff] [blame] | 70 | static int setup_sigcontext32(struct pt_regs *regs, |
| 71 | struct sigcontext32 __user *sc) |
| 72 | { |
| 73 | int err = 0; |
| 74 | int i; |
| 75 | |
| 76 | err |= __put_user(regs->cp0_epc, &sc->sc_pc); |
Franck Bui-Huu | 9432a9b | 2007-02-05 15:24:25 +0100 | [diff] [blame] | 77 | |
| 78 | err |= __put_user(0, &sc->sc_regs[0]); |
| 79 | for (i = 1; i < 32; i++) |
| 80 | err |= __put_user(regs->regs[i], &sc->sc_regs[i]); |
| 81 | |
| 82 | err |= __put_user(regs->hi, &sc->sc_mdhi); |
| 83 | err |= __put_user(regs->lo, &sc->sc_mdlo); |
| 84 | if (cpu_has_dsp) { |
| 85 | err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp); |
| 86 | err |= __put_user(mfhi1(), &sc->sc_hi1); |
| 87 | err |= __put_user(mflo1(), &sc->sc_lo1); |
| 88 | err |= __put_user(mfhi2(), &sc->sc_hi2); |
| 89 | err |= __put_user(mflo2(), &sc->sc_lo2); |
| 90 | err |= __put_user(mfhi3(), &sc->sc_hi3); |
| 91 | err |= __put_user(mflo3(), &sc->sc_lo3); |
| 92 | } |
| 93 | |
Paul Burton | d02a40a | 2015-07-27 12:58:18 -0700 | [diff] [blame] | 94 | /* |
| 95 | * Save FPU state to signal context. Signal handler |
| 96 | * will "inherit" current FPU state. |
| 97 | */ |
| 98 | err |= protected_save_fp_context(sc); |
Franck Bui-Huu | 9432a9b | 2007-02-05 15:24:25 +0100 | [diff] [blame] | 99 | |
Franck Bui-Huu | 9432a9b | 2007-02-05 15:24:25 +0100 | [diff] [blame] | 100 | return err; |
| 101 | } |
| 102 | |
| 103 | static int restore_sigcontext32(struct pt_regs *regs, |
| 104 | struct sigcontext32 __user *sc) |
| 105 | { |
Franck Bui-Huu | 9432a9b | 2007-02-05 15:24:25 +0100 | [diff] [blame] | 106 | int err = 0; |
| 107 | s32 treg; |
| 108 | int i; |
| 109 | |
| 110 | /* Always make any pending restarted system calls return -EINTR */ |
Andy Lutomirski | f56141e | 2015-02-12 15:01:14 -0800 | [diff] [blame] | 111 | current->restart_block.fn = do_no_restart_syscall; |
Franck Bui-Huu | 9432a9b | 2007-02-05 15:24:25 +0100 | [diff] [blame] | 112 | |
| 113 | err |= __get_user(regs->cp0_epc, &sc->sc_pc); |
| 114 | err |= __get_user(regs->hi, &sc->sc_mdhi); |
| 115 | err |= __get_user(regs->lo, &sc->sc_mdlo); |
| 116 | if (cpu_has_dsp) { |
| 117 | err |= __get_user(treg, &sc->sc_hi1); mthi1(treg); |
| 118 | err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg); |
| 119 | err |= __get_user(treg, &sc->sc_hi2); mthi2(treg); |
| 120 | err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg); |
| 121 | err |= __get_user(treg, &sc->sc_hi3); mthi3(treg); |
| 122 | err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg); |
| 123 | err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK); |
| 124 | } |
| 125 | |
| 126 | for (i = 1; i < 32; i++) |
| 127 | err |= __get_user(regs->regs[i], &sc->sc_regs[i]); |
| 128 | |
Paul Burton | d02a40a | 2015-07-27 12:58:18 -0700 | [diff] [blame] | 129 | return err ?: protected_restore_fp_context(sc); |
Franck Bui-Huu | 9432a9b | 2007-02-05 15:24:25 +0100 | [diff] [blame] | 130 | } |
| 131 | |
| 132 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | * Atomically swap in the new signal mask, and wait for a signal. |
| 134 | */ |
| 135 | |
Al Viro | 1910f4a | 2012-12-25 16:25:18 -0500 | [diff] [blame] | 136 | asmlinkage int sys32_sigsuspend(compat_sigset_t __user *uset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | { |
Al Viro | 1910f4a | 2012-12-25 16:25:18 -0500 | [diff] [blame] | 138 | return compat_sys_rt_sigsuspend(uset, sizeof(compat_sigset_t)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | } |
| 140 | |
Al Viro | aa58480 | 2012-12-25 18:55:27 -0500 | [diff] [blame] | 141 | SYSCALL_DEFINE3(32_sigaction, long, sig, const struct compat_sigaction __user *, act, |
| 142 | struct compat_sigaction __user *, oact) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | { |
| 144 | struct k_sigaction new_ka, old_ka; |
| 145 | int ret; |
| 146 | int err = 0; |
| 147 | |
| 148 | if (act) { |
| 149 | old_sigset_t mask; |
Ralf Baechle | 77c728c | 2005-03-04 19:36:51 +0000 | [diff] [blame] | 150 | s32 handler; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | |
| 152 | if (!access_ok(VERIFY_READ, act, sizeof(*act))) |
| 153 | return -EFAULT; |
Ralf Baechle | 77c728c | 2005-03-04 19:36:51 +0000 | [diff] [blame] | 154 | err |= __get_user(handler, &act->sa_handler); |
Atsushi Nemoto | 9bbf28a3 | 2006-02-01 01:41:09 +0900 | [diff] [blame] | 155 | new_ka.sa.sa_handler = (void __user *)(s64)handler; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | err |= __get_user(new_ka.sa.sa_flags, &act->sa_flags); |
| 157 | err |= __get_user(mask, &act->sa_mask.sig[0]); |
| 158 | if (err) |
| 159 | return -EFAULT; |
| 160 | |
| 161 | siginitset(&new_ka.sa.sa_mask, mask); |
| 162 | } |
| 163 | |
| 164 | ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); |
| 165 | |
| 166 | if (!ret && oact) { |
| 167 | if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact))) |
Martin Michlmayr | 6254944 | 2006-02-18 20:06:32 +0000 | [diff] [blame] | 168 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | err |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags); |
| 170 | err |= __put_user((u32)(u64)old_ka.sa.sa_handler, |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 171 | &oact->sa_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | 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] | 173 | err |= __put_user(0, &oact->sa_mask.sig[1]); |
| 174 | err |= __put_user(0, &oact->sa_mask.sig[2]); |
| 175 | err |= __put_user(0, &oact->sa_mask.sig[3]); |
| 176 | if (err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | return -EFAULT; |
| 178 | } |
| 179 | |
| 180 | return ret; |
| 181 | } |
| 182 | |
Al Viro | ce39596 | 2013-10-13 17:23:53 -0400 | [diff] [blame] | 183 | int copy_siginfo_to_user32(compat_siginfo_t __user *to, const siginfo_t *from) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | { |
| 185 | int err; |
| 186 | |
| 187 | if (!access_ok (VERIFY_WRITE, to, sizeof(compat_siginfo_t))) |
| 188 | return -EFAULT; |
| 189 | |
| 190 | /* If you change siginfo_t structure, please be sure |
| 191 | this code is fixed accordingly. |
| 192 | It should never copy any pad contained in the structure |
| 193 | to avoid security leaks, but must copy the generic |
| 194 | 3 ints plus the relevant union member. |
| 195 | This routine must convert siginfo from 64bit to 32bit as well |
| 196 | at the same time. */ |
| 197 | err = __put_user(from->si_signo, &to->si_signo); |
| 198 | err |= __put_user(from->si_errno, &to->si_errno); |
| 199 | err |= __put_user((short)from->si_code, &to->si_code); |
| 200 | if (from->si_code < 0) |
| 201 | err |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE); |
| 202 | else { |
| 203 | switch (from->si_code >> 16) { |
Ralf Baechle | a982099 | 2005-02-16 21:24:16 +0000 | [diff] [blame] | 204 | case __SI_TIMER >> 16: |
| 205 | err |= __put_user(from->si_tid, &to->si_tid); |
| 206 | err |= __put_user(from->si_overrun, &to->si_overrun); |
| 207 | err |= __put_user(from->si_int, &to->si_int); |
| 208 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | case __SI_CHLD >> 16: |
| 210 | err |= __put_user(from->si_utime, &to->si_utime); |
| 211 | err |= __put_user(from->si_stime, &to->si_stime); |
| 212 | err |= __put_user(from->si_status, &to->si_status); |
| 213 | default: |
| 214 | err |= __put_user(from->si_pid, &to->si_pid); |
| 215 | err |= __put_user(from->si_uid, &to->si_uid); |
| 216 | break; |
| 217 | case __SI_FAULT >> 16: |
Atsushi Nemoto | 5665a0a | 2006-02-02 01:26:34 +0900 | [diff] [blame] | 218 | err |= __put_user((unsigned long)from->si_addr, &to->si_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | break; |
| 220 | case __SI_POLL >> 16: |
| 221 | err |= __put_user(from->si_band, &to->si_band); |
| 222 | err |= __put_user(from->si_fd, &to->si_fd); |
| 223 | break; |
| 224 | case __SI_RT >> 16: /* This is not generated by the kernel as of now. */ |
| 225 | case __SI_MESGQ >> 16: |
| 226 | err |= __put_user(from->si_pid, &to->si_pid); |
| 227 | err |= __put_user(from->si_uid, &to->si_uid); |
| 228 | err |= __put_user(from->si_int, &to->si_int); |
| 229 | break; |
Matt Redfearn | 5050e91 | 2016-03-29 09:35:30 +0100 | [diff] [blame^] | 230 | case __SI_SYS >> 16: |
| 231 | err |= __copy_to_user(&to->si_call_addr, &from->si_call_addr, |
| 232 | sizeof(compat_uptr_t)); |
| 233 | err |= __put_user(from->si_syscall, &to->si_syscall); |
| 234 | err |= __put_user(from->si_arch, &to->si_arch); |
| 235 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | } |
| 237 | } |
| 238 | return err; |
| 239 | } |
| 240 | |
Thomas Bogendoerfer | 5d9a76c | 2008-08-17 16:49:25 +0200 | [diff] [blame] | 241 | int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from) |
| 242 | { |
Thomas Bogendoerfer | 5d9a76c | 2008-08-17 16:49:25 +0200 | [diff] [blame] | 243 | if (copy_from_user(to, from, 3*sizeof(int)) || |
| 244 | copy_from_user(to->_sifields._pad, |
| 245 | from->_sifields._pad, SI_PAD_SIZE32)) |
| 246 | return -EFAULT; |
| 247 | |
| 248 | return 0; |
| 249 | } |
| 250 | |
Franck Bui-Huu | f90080a | 2007-02-05 15:24:27 +0100 | [diff] [blame] | 251 | asmlinkage void sys32_sigreturn(nabi_no_regargs struct pt_regs regs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | { |
Ralf Baechle | dd02f06 | 2007-02-13 00:50:57 +0000 | [diff] [blame] | 253 | struct sigframe32 __user *frame; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | sigset_t blocked; |
Atsushi Nemoto | c6a2f46 | 2007-03-10 01:03:48 +0900 | [diff] [blame] | 255 | int sig; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | |
Ralf Baechle | dd02f06 | 2007-02-13 00:50:57 +0000 | [diff] [blame] | 257 | frame = (struct sigframe32 __user *) regs.regs[29]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) |
| 259 | goto badframe; |
Ralf Baechle | 431dc80 | 2007-02-13 00:05:11 +0000 | [diff] [blame] | 260 | if (__copy_conv_sigset_from_user(&blocked, &frame->sf_mask)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | goto badframe; |
| 262 | |
Matt Fleming | 8598f3c | 2012-02-14 11:40:52 +0000 | [diff] [blame] | 263 | set_current_blocked(&blocked); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | |
Atsushi Nemoto | c6a2f46 | 2007-03-10 01:03:48 +0900 | [diff] [blame] | 265 | sig = restore_sigcontext32(®s, &frame->sf_sc); |
| 266 | if (sig < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | goto badframe; |
Atsushi Nemoto | c6a2f46 | 2007-03-10 01:03:48 +0900 | [diff] [blame] | 268 | else if (sig) |
| 269 | force_sig(sig, current); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | |
| 271 | /* |
| 272 | * Don't let your children do this ... |
| 273 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | __asm__ __volatile__( |
| 275 | "move\t$29, %0\n\t" |
| 276 | "j\tsyscall_exit" |
| 277 | :/* no outputs */ |
| 278 | :"r" (®s)); |
| 279 | /* Unreached */ |
| 280 | |
| 281 | badframe: |
| 282 | force_sig(SIGSEGV, current); |
| 283 | } |
| 284 | |
Franck Bui-Huu | f90080a | 2007-02-05 15:24:27 +0100 | [diff] [blame] | 285 | asmlinkage void sys32_rt_sigreturn(nabi_no_regargs struct pt_regs regs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | { |
Atsushi Nemoto | 9bbf28a3 | 2006-02-01 01:41:09 +0900 | [diff] [blame] | 287 | struct rt_sigframe32 __user *frame; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | sigset_t set; |
Atsushi Nemoto | c6a2f46 | 2007-03-10 01:03:48 +0900 | [diff] [blame] | 289 | int sig; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | |
Atsushi Nemoto | 9bbf28a3 | 2006-02-01 01:41:09 +0900 | [diff] [blame] | 291 | frame = (struct rt_sigframe32 __user *) regs.regs[29]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) |
| 293 | goto badframe; |
Ralf Baechle | 431dc80 | 2007-02-13 00:05:11 +0000 | [diff] [blame] | 294 | if (__copy_conv_sigset_from_user(&set, &frame->rs_uc.uc_sigmask)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | goto badframe; |
| 296 | |
Matt Fleming | 8598f3c | 2012-02-14 11:40:52 +0000 | [diff] [blame] | 297 | set_current_blocked(&set); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | |
Atsushi Nemoto | c6a2f46 | 2007-03-10 01:03:48 +0900 | [diff] [blame] | 299 | sig = restore_sigcontext32(®s, &frame->rs_uc.uc_mcontext); |
| 300 | if (sig < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | goto badframe; |
Atsushi Nemoto | c6a2f46 | 2007-03-10 01:03:48 +0900 | [diff] [blame] | 302 | else if (sig) |
| 303 | force_sig(sig, current); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | |
Al Viro | ea536ad | 2012-12-23 03:13:40 -0500 | [diff] [blame] | 305 | if (compat_restore_altstack(&frame->rs_uc.uc_stack)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | goto badframe; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | |
| 308 | /* |
| 309 | * Don't let your children do this ... |
| 310 | */ |
| 311 | __asm__ __volatile__( |
| 312 | "move\t$29, %0\n\t" |
| 313 | "j\tsyscall_exit" |
| 314 | :/* no outputs */ |
| 315 | :"r" (®s)); |
| 316 | /* Unreached */ |
| 317 | |
| 318 | badframe: |
| 319 | force_sig(SIGSEGV, current); |
| 320 | } |
| 321 | |
Richard Weinberger | 81d103b | 2013-10-06 22:25:42 +0200 | [diff] [blame] | 322 | static int setup_frame_32(void *sig_return, struct ksignal *ksig, |
| 323 | struct pt_regs *regs, sigset_t *set) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | { |
Ralf Baechle | dd02f06 | 2007-02-13 00:50:57 +0000 | [diff] [blame] | 325 | struct sigframe32 __user *frame; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | int err = 0; |
| 327 | |
Richard Weinberger | 7c4f563 | 2014-03-05 15:35:41 +0100 | [diff] [blame] | 328 | frame = get_sigframe(ksig, regs, sizeof(*frame)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame))) |
Richard Weinberger | 81d103b | 2013-10-06 22:25:42 +0200 | [diff] [blame] | 330 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | err |= setup_sigcontext32(regs, &frame->sf_sc); |
Ralf Baechle | 431dc80 | 2007-02-13 00:05:11 +0000 | [diff] [blame] | 333 | err |= __copy_conv_sigset_to_user(&frame->sf_mask, set); |
| 334 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | if (err) |
Richard Weinberger | 81d103b | 2013-10-06 22:25:42 +0200 | [diff] [blame] | 336 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | |
| 338 | /* |
| 339 | * Arguments to signal handler: |
| 340 | * |
| 341 | * a0 = signal number |
| 342 | * a1 = 0 (should be cause) |
| 343 | * a2 = pointer to struct sigcontext |
| 344 | * |
| 345 | * $25 and c0_epc point to the signal handler, $29 points to the |
| 346 | * struct sigframe. |
| 347 | */ |
Richard Weinberger | 81d103b | 2013-10-06 22:25:42 +0200 | [diff] [blame] | 348 | regs->regs[ 4] = ksig->sig; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | regs->regs[ 5] = 0; |
| 350 | regs->regs[ 6] = (unsigned long) &frame->sf_sc; |
| 351 | regs->regs[29] = (unsigned long) frame; |
David Daney | d814c28 | 2010-02-18 16:13:05 -0800 | [diff] [blame] | 352 | regs->regs[31] = (unsigned long) sig_return; |
Richard Weinberger | 81d103b | 2013-10-06 22:25:42 +0200 | [diff] [blame] | 353 | regs->cp0_epc = regs->regs[25] = (unsigned long) ksig->ka.sa.sa_handler; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | |
Franck Bui-Huu | 722bb63 | 2007-02-05 15:24:24 +0100 | [diff] [blame] | 355 | DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | current->comm, current->pid, |
Franck Bui-Huu | 722bb63 | 2007-02-05 15:24:24 +0100 | [diff] [blame] | 357 | frame, regs->cp0_epc, regs->regs[31]); |
| 358 | |
Ralf Baechle | 7b3e2fc | 2006-02-08 12:58:41 +0000 | [diff] [blame] | 359 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | } |
| 361 | |
Richard Weinberger | 81d103b | 2013-10-06 22:25:42 +0200 | [diff] [blame] | 362 | static int setup_rt_frame_32(void *sig_return, struct ksignal *ksig, |
| 363 | struct pt_regs *regs, sigset_t *set) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | { |
Atsushi Nemoto | 9bbf28a3 | 2006-02-01 01:41:09 +0900 | [diff] [blame] | 365 | struct rt_sigframe32 __user *frame; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | int err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | |
Richard Weinberger | 7c4f563 | 2014-03-05 15:35:41 +0100 | [diff] [blame] | 368 | frame = get_sigframe(ksig, regs, sizeof(*frame)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame))) |
Richard Weinberger | 81d103b | 2013-10-06 22:25:42 +0200 | [diff] [blame] | 370 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | /* Convert (siginfo_t -> compat_siginfo_t) and copy to user. */ |
Richard Weinberger | 81d103b | 2013-10-06 22:25:42 +0200 | [diff] [blame] | 373 | err |= copy_siginfo_to_user32(&frame->rs_info, &ksig->info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 375 | /* Create the ucontext. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | err |= __put_user(0, &frame->rs_uc.uc_flags); |
| 377 | err |= __put_user(0, &frame->rs_uc.uc_link); |
Al Viro | ea536ad | 2012-12-23 03:13:40 -0500 | [diff] [blame] | 378 | err |= __compat_save_altstack(&frame->rs_uc.uc_stack, regs->regs[29]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | err |= setup_sigcontext32(regs, &frame->rs_uc.uc_mcontext); |
Ralf Baechle | 431dc80 | 2007-02-13 00:05:11 +0000 | [diff] [blame] | 380 | err |= __copy_conv_sigset_to_user(&frame->rs_uc.uc_sigmask, set); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | |
| 382 | if (err) |
Richard Weinberger | 81d103b | 2013-10-06 22:25:42 +0200 | [diff] [blame] | 383 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | |
| 385 | /* |
| 386 | * Arguments to signal handler: |
| 387 | * |
| 388 | * a0 = signal number |
| 389 | * a1 = 0 (should be cause) |
| 390 | * a2 = pointer to ucontext |
| 391 | * |
| 392 | * $25 and c0_epc point to the signal handler, $29 points to |
| 393 | * the struct rt_sigframe32. |
| 394 | */ |
Richard Weinberger | 81d103b | 2013-10-06 22:25:42 +0200 | [diff] [blame] | 395 | regs->regs[ 4] = ksig->sig; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | regs->regs[ 5] = (unsigned long) &frame->rs_info; |
| 397 | regs->regs[ 6] = (unsigned long) &frame->rs_uc; |
| 398 | regs->regs[29] = (unsigned long) frame; |
David Daney | d814c28 | 2010-02-18 16:13:05 -0800 | [diff] [blame] | 399 | regs->regs[31] = (unsigned long) sig_return; |
Richard Weinberger | 81d103b | 2013-10-06 22:25:42 +0200 | [diff] [blame] | 400 | regs->cp0_epc = regs->regs[25] = (unsigned long) ksig->ka.sa.sa_handler; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | |
Franck Bui-Huu | 722bb63 | 2007-02-05 15:24:24 +0100 | [diff] [blame] | 402 | DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | current->comm, current->pid, |
Franck Bui-Huu | 722bb63 | 2007-02-05 15:24:24 +0100 | [diff] [blame] | 404 | frame, regs->cp0_epc, regs->regs[31]); |
| 405 | |
Ralf Baechle | 7b3e2fc | 2006-02-08 12:58:41 +0000 | [diff] [blame] | 406 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | } |
| 408 | |
Ralf Baechle | 151fd6a | 2007-02-15 11:40:37 +0000 | [diff] [blame] | 409 | /* |
| 410 | * o32 compatibility on 64-bit kernels, without DSP ASE |
| 411 | */ |
| 412 | struct mips_abi mips_abi_32 = { |
| 413 | .setup_frame = setup_frame_32, |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 414 | .setup_rt_frame = setup_rt_frame_32, |
Paul Burton | 7785610 | 2015-07-27 12:58:14 -0700 | [diff] [blame] | 415 | .restart = __NR_O32_restart_syscall, |
| 416 | |
| 417 | .off_sc_fpregs = offsetof(struct sigcontext32, sc_fpregs), |
| 418 | .off_sc_fpc_csr = offsetof(struct sigcontext32, sc_fpc_csr), |
| 419 | .off_sc_used_math = offsetof(struct sigcontext32, sc_used_math), |
Alex Smith | ebb5e78 | 2015-10-21 09:54:38 +0100 | [diff] [blame] | 420 | |
| 421 | .vdso = &vdso_image_o32, |
Ralf Baechle | 151fd6a | 2007-02-15 11:40:37 +0000 | [diff] [blame] | 422 | }; |