Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Signal handling |
| 3 | * |
| 4 | * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> |
| 5 | * Copyright (C) 2008-2009 PetaLogix |
| 6 | * Copyright (C) 2003,2004 John Williams <jwilliams@itee.uq.edu.au> |
| 7 | * Copyright (C) 2001 NEC Corporation |
| 8 | * Copyright (C) 2001 Miles Bader <miles@gnu.org> |
| 9 | * Copyright (C) 1999,2000 Niibe Yutaka & Kaz Kojima |
| 10 | * Copyright (C) 1991,1992 Linus Torvalds |
| 11 | * |
| 12 | * 1997-11-28 Modified for POSIX.1b signals by Richard Henderson |
| 13 | * |
| 14 | * This file was was derived from the sh version, arch/sh/kernel/signal.c |
| 15 | * |
| 16 | * This file is subject to the terms and conditions of the GNU General |
| 17 | * Public License. See the file COPYING in the main directory of this |
| 18 | * archive for more details. |
| 19 | */ |
| 20 | |
| 21 | #include <linux/sched.h> |
| 22 | #include <linux/mm.h> |
| 23 | #include <linux/smp.h> |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 24 | #include <linux/kernel.h> |
| 25 | #include <linux/signal.h> |
| 26 | #include <linux/errno.h> |
| 27 | #include <linux/wait.h> |
| 28 | #include <linux/ptrace.h> |
| 29 | #include <linux/unistd.h> |
| 30 | #include <linux/stddef.h> |
| 31 | #include <linux/personality.h> |
| 32 | #include <linux/percpu.h> |
| 33 | #include <linux/linkage.h> |
Al Viro | 969a961 | 2012-04-24 02:03:06 -0400 | [diff] [blame] | 34 | #include <linux/tracehook.h> |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 35 | #include <asm/entry.h> |
| 36 | #include <asm/ucontext.h> |
| 37 | #include <linux/uaccess.h> |
| 38 | #include <asm/pgtable.h> |
| 39 | #include <asm/pgalloc.h> |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 40 | #include <linux/syscalls.h> |
| 41 | #include <asm/cacheflush.h> |
| 42 | #include <asm/syscalls.h> |
| 43 | |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 44 | /* |
| 45 | * Do a signal return; undo the signal stack. |
| 46 | */ |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 47 | struct sigframe { |
| 48 | struct sigcontext sc; |
| 49 | unsigned long extramask[_NSIG_WORDS-1]; |
| 50 | unsigned long tramp[2]; /* signal trampoline */ |
| 51 | }; |
| 52 | |
| 53 | struct rt_sigframe { |
| 54 | struct siginfo info; |
| 55 | struct ucontext uc; |
| 56 | unsigned long tramp[2]; /* signal trampoline */ |
| 57 | }; |
| 58 | |
Arnd Bergmann | 353b431 | 2009-05-01 13:37:46 +0000 | [diff] [blame] | 59 | static int restore_sigcontext(struct pt_regs *regs, |
| 60 | struct sigcontext __user *sc, int *rval_p) |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 61 | { |
| 62 | unsigned int err = 0; |
| 63 | |
| 64 | #define COPY(x) {err |= __get_user(regs->x, &sc->regs.x); } |
| 65 | COPY(r0); |
| 66 | COPY(r1); |
| 67 | COPY(r2); COPY(r3); COPY(r4); COPY(r5); |
| 68 | COPY(r6); COPY(r7); COPY(r8); COPY(r9); |
| 69 | COPY(r10); COPY(r11); COPY(r12); COPY(r13); |
| 70 | COPY(r14); COPY(r15); COPY(r16); COPY(r17); |
| 71 | COPY(r18); COPY(r19); COPY(r20); COPY(r21); |
| 72 | COPY(r22); COPY(r23); COPY(r24); COPY(r25); |
| 73 | COPY(r26); COPY(r27); COPY(r28); COPY(r29); |
| 74 | COPY(r30); COPY(r31); |
| 75 | COPY(pc); COPY(ear); COPY(esr); COPY(fsr); |
| 76 | #undef COPY |
| 77 | |
| 78 | *rval_p = regs->r3; |
| 79 | |
| 80 | return err; |
| 81 | } |
| 82 | |
Arnd Bergmann | 3183e06 | 2009-06-18 19:55:29 +0200 | [diff] [blame] | 83 | asmlinkage long sys_rt_sigreturn(struct pt_regs *regs) |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 84 | { |
Arnd Bergmann | 353b431 | 2009-05-01 13:37:46 +0000 | [diff] [blame] | 85 | struct rt_sigframe __user *frame = |
Michal Simek | 6e83557 | 2011-01-31 15:10:04 +0100 | [diff] [blame] | 86 | (struct rt_sigframe __user *)(regs->r1); |
Michal Simek | 2921e2b | 2009-04-21 14:08:47 +0200 | [diff] [blame] | 87 | |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 88 | sigset_t set; |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 89 | int rval; |
| 90 | |
Al Viro | 58e4257 | 2012-04-22 03:32:18 -0400 | [diff] [blame] | 91 | /* Always make any pending restarted system calls return -EINTR */ |
| 92 | current_thread_info()->restart_block.fn = do_no_restart_syscall; |
| 93 | |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 94 | if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) |
| 95 | goto badframe; |
| 96 | |
| 97 | if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set))) |
| 98 | goto badframe; |
| 99 | |
Matt Fleming | 60c5975 | 2012-05-11 10:58:05 +1000 | [diff] [blame] | 100 | set_current_blocked(&set); |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 101 | |
| 102 | if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &rval)) |
| 103 | goto badframe; |
| 104 | |
Al Viro | 4a9d32d | 2012-12-23 03:08:53 -0500 | [diff] [blame] | 105 | if (restore_altstack(&frame->uc.uc_stack)) |
Arnd Bergmann | 353b431 | 2009-05-01 13:37:46 +0000 | [diff] [blame] | 106 | goto badframe; |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 107 | |
| 108 | return rval; |
| 109 | |
| 110 | badframe: |
| 111 | force_sig(SIGSEGV, current); |
| 112 | return 0; |
| 113 | } |
| 114 | |
| 115 | /* |
| 116 | * Set up a signal frame. |
| 117 | */ |
| 118 | |
| 119 | static int |
Arnd Bergmann | 353b431 | 2009-05-01 13:37:46 +0000 | [diff] [blame] | 120 | setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs, |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 121 | unsigned long mask) |
| 122 | { |
| 123 | int err = 0; |
| 124 | |
| 125 | #define COPY(x) {err |= __put_user(regs->x, &sc->regs.x); } |
| 126 | COPY(r0); |
| 127 | COPY(r1); |
| 128 | COPY(r2); COPY(r3); COPY(r4); COPY(r5); |
| 129 | COPY(r6); COPY(r7); COPY(r8); COPY(r9); |
| 130 | COPY(r10); COPY(r11); COPY(r12); COPY(r13); |
| 131 | COPY(r14); COPY(r15); COPY(r16); COPY(r17); |
| 132 | COPY(r18); COPY(r19); COPY(r20); COPY(r21); |
| 133 | COPY(r22); COPY(r23); COPY(r24); COPY(r25); |
| 134 | COPY(r26); COPY(r27); COPY(r28); COPY(r29); |
| 135 | COPY(r30); COPY(r31); |
| 136 | COPY(pc); COPY(ear); COPY(esr); COPY(fsr); |
| 137 | #undef COPY |
| 138 | |
| 139 | err |= __put_user(mask, &sc->oldmask); |
| 140 | |
| 141 | return err; |
| 142 | } |
| 143 | |
| 144 | /* |
| 145 | * Determine which stack to use.. |
| 146 | */ |
Arnd Bergmann | 353b431 | 2009-05-01 13:37:46 +0000 | [diff] [blame] | 147 | static inline void __user * |
Richard Weinberger | c001cd2 | 2014-03-05 15:32:52 +0100 | [diff] [blame^] | 148 | get_sigframe(struct ksignal *ksig, struct pt_regs *regs, size_t frame_size) |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 149 | { |
| 150 | /* Default to using normal stack */ |
Richard Weinberger | c001cd2 | 2014-03-05 15:32:52 +0100 | [diff] [blame^] | 151 | unsigned long sp = sigsp(regs->r1, ksig); |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 152 | |
Arnd Bergmann | 353b431 | 2009-05-01 13:37:46 +0000 | [diff] [blame] | 153 | return (void __user *)((sp - frame_size) & -8UL); |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 154 | } |
| 155 | |
Richard Weinberger | 9c53c7e | 2013-10-07 14:14:38 +0200 | [diff] [blame] | 156 | static int setup_rt_frame(struct ksignal *ksig, sigset_t *set, |
| 157 | struct pt_regs *regs) |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 158 | { |
Arnd Bergmann | 353b431 | 2009-05-01 13:37:46 +0000 | [diff] [blame] | 159 | struct rt_sigframe __user *frame; |
Richard Weinberger | 9c53c7e | 2013-10-07 14:14:38 +0200 | [diff] [blame] | 160 | int err = 0, sig = ksig->sig; |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 161 | int signal; |
Michal Simek | 2ee2ff8 | 2009-12-10 11:43:57 +0100 | [diff] [blame] | 162 | unsigned long address = 0; |
| 163 | #ifdef CONFIG_MMU |
| 164 | pmd_t *pmdp; |
| 165 | pte_t *ptep; |
| 166 | #endif |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 167 | |
Richard Weinberger | c001cd2 | 2014-03-05 15:32:52 +0100 | [diff] [blame^] | 168 | frame = get_sigframe(ksig, regs, sizeof(*frame)); |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 169 | |
| 170 | if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) |
Richard Weinberger | 9c53c7e | 2013-10-07 14:14:38 +0200 | [diff] [blame] | 171 | return -EFAULT; |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 172 | |
| 173 | signal = current_thread_info()->exec_domain |
| 174 | && current_thread_info()->exec_domain->signal_invmap |
| 175 | && sig < 32 |
| 176 | ? current_thread_info()->exec_domain->signal_invmap[sig] |
| 177 | : sig; |
| 178 | |
Richard Weinberger | 9c53c7e | 2013-10-07 14:14:38 +0200 | [diff] [blame] | 179 | if (ksig->ka.sa.sa_flags & SA_SIGINFO) |
| 180 | err |= copy_siginfo_to_user(&frame->info, &ksig->info); |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 181 | |
| 182 | /* Create the ucontext. */ |
| 183 | err |= __put_user(0, &frame->uc.uc_flags); |
Michal Simek | 2cfedb9 | 2011-02-07 12:25:37 +0100 | [diff] [blame] | 184 | err |= __put_user(NULL, &frame->uc.uc_link); |
Al Viro | 4a9d32d | 2012-12-23 03:08:53 -0500 | [diff] [blame] | 185 | err |= __save_altstack(&frame->uc.uc_stack, regs->r1); |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 186 | err |= setup_sigcontext(&frame->uc.uc_mcontext, |
| 187 | regs, set->sig[0]); |
| 188 | err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); |
| 189 | |
| 190 | /* Set up to return from userspace. If provided, use a stub |
| 191 | already in userspace. */ |
| 192 | /* minus 8 is offset to cater for "rtsd r15,8" */ |
Arnd Bergmann | 3183e06 | 2009-06-18 19:55:29 +0200 | [diff] [blame] | 193 | /* addi r12, r0, __NR_sigreturn */ |
| 194 | err |= __put_user(0x31800000 | __NR_rt_sigreturn , |
| 195 | frame->tramp + 0); |
| 196 | /* brki r14, 0x8 */ |
| 197 | err |= __put_user(0xb9cc0008, frame->tramp + 1); |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 198 | |
Arnd Bergmann | 3183e06 | 2009-06-18 19:55:29 +0200 | [diff] [blame] | 199 | /* Return from sighandler will jump to the tramp. |
| 200 | Negative 8 offset because return is rtsd r15, 8 */ |
| 201 | regs->r15 = ((unsigned long)frame->tramp)-8; |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 202 | |
Michal Simek | 2ee2ff8 | 2009-12-10 11:43:57 +0100 | [diff] [blame] | 203 | address = ((unsigned long)frame->tramp); |
| 204 | #ifdef CONFIG_MMU |
| 205 | pmdp = pmd_offset(pud_offset( |
| 206 | pgd_offset(current->mm, address), |
| 207 | address), address); |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 208 | |
Michal Simek | 2ee2ff8 | 2009-12-10 11:43:57 +0100 | [diff] [blame] | 209 | preempt_disable(); |
| 210 | ptep = pte_offset_map(pmdp, address); |
| 211 | if (pte_present(*ptep)) { |
| 212 | address = (unsigned long) page_address(pte_page(*ptep)); |
| 213 | /* MS: I need add offset in page */ |
| 214 | address += ((unsigned long)frame->tramp) & ~PAGE_MASK; |
| 215 | /* MS address is virtual */ |
Michal Simek | a66a626 | 2013-02-07 15:12:24 +0100 | [diff] [blame] | 216 | address = __virt_to_phys(address); |
Michal Simek | 2ee2ff8 | 2009-12-10 11:43:57 +0100 | [diff] [blame] | 217 | invalidate_icache_range(address, address + 8); |
| 218 | flush_dcache_range(address, address + 8); |
| 219 | } |
| 220 | pte_unmap(ptep); |
| 221 | preempt_enable(); |
| 222 | #else |
| 223 | flush_icache_range(address, address + 8); |
| 224 | flush_dcache_range(address, address + 8); |
| 225 | #endif |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 226 | if (err) |
Richard Weinberger | 9c53c7e | 2013-10-07 14:14:38 +0200 | [diff] [blame] | 227 | return -EFAULT; |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 228 | |
| 229 | /* Set up registers for signal handler */ |
Michal Simek | 6e83557 | 2011-01-31 15:10:04 +0100 | [diff] [blame] | 230 | regs->r1 = (unsigned long) frame; |
Michal Simek | 2921e2b | 2009-04-21 14:08:47 +0200 | [diff] [blame] | 231 | |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 232 | /* Signal handler args: */ |
| 233 | regs->r5 = signal; /* arg 0: signum */ |
| 234 | regs->r6 = (unsigned long) &frame->info; /* arg 1: siginfo */ |
| 235 | regs->r7 = (unsigned long) &frame->uc; /* arg2: ucontext */ |
| 236 | /* Offset to handle microblaze rtid r14, 0 */ |
Richard Weinberger | 9c53c7e | 2013-10-07 14:14:38 +0200 | [diff] [blame] | 237 | regs->pc = (unsigned long)ksig->ka.sa.sa_handler; |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 238 | |
| 239 | set_fs(USER_DS); |
| 240 | |
| 241 | #ifdef DEBUG_SIG |
Michal Simek | 6bd55f0 | 2012-12-27 10:40:38 +0100 | [diff] [blame] | 242 | pr_info("SIG deliver (%s:%d): sp=%p pc=%08lx\n", |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 243 | current->comm, current->pid, frame, regs->pc); |
| 244 | #endif |
| 245 | |
Matt Fleming | bcb8c8d | 2012-05-11 10:58:04 +1000 | [diff] [blame] | 246 | return 0; |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 247 | } |
| 248 | |
| 249 | /* Handle restarting system calls */ |
| 250 | static inline void |
| 251 | handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler) |
| 252 | { |
| 253 | switch (regs->r3) { |
| 254 | case -ERESTART_RESTARTBLOCK: |
| 255 | case -ERESTARTNOHAND: |
| 256 | if (!has_handler) |
| 257 | goto do_restart; |
| 258 | regs->r3 = -EINTR; |
| 259 | break; |
| 260 | case -ERESTARTSYS: |
| 261 | if (has_handler && !(ka->sa.sa_flags & SA_RESTART)) { |
| 262 | regs->r3 = -EINTR; |
| 263 | break; |
| 264 | } |
| 265 | /* fallthrough */ |
| 266 | case -ERESTARTNOINTR: |
| 267 | do_restart: |
| 268 | /* offset of 4 bytes to re-execute trap (brki) instruction */ |
| 269 | regs->pc -= 4; |
| 270 | break; |
| 271 | } |
| 272 | } |
| 273 | |
| 274 | /* |
| 275 | * OK, we're invoking a handler |
| 276 | */ |
| 277 | |
Al Viro | a610d6e | 2012-05-21 23:42:15 -0400 | [diff] [blame] | 278 | static void |
Richard Weinberger | 9c53c7e | 2013-10-07 14:14:38 +0200 | [diff] [blame] | 279 | handle_signal(struct ksignal *ksig, struct pt_regs *regs) |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 280 | { |
Al Viro | b7f9a11 | 2012-05-02 09:59:21 -0400 | [diff] [blame] | 281 | sigset_t *oldset = sigmask_to_save(); |
Matt Fleming | bcb8c8d | 2012-05-11 10:58:04 +1000 | [diff] [blame] | 282 | int ret; |
| 283 | |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 284 | /* Set up the stack frame */ |
Richard Weinberger | 9c53c7e | 2013-10-07 14:14:38 +0200 | [diff] [blame] | 285 | ret = setup_rt_frame(ksig, oldset, regs); |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 286 | |
Richard Weinberger | 9c53c7e | 2013-10-07 14:14:38 +0200 | [diff] [blame] | 287 | signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLESTEP)); |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 288 | } |
| 289 | |
| 290 | /* |
| 291 | * Note that 'init' is a special process: it doesn't get signals it doesn't |
| 292 | * want to handle. Thus you cannot kill init even with a SIGKILL even by |
| 293 | * mistake. |
| 294 | * |
| 295 | * Note that we go through the signals twice: once to check the signals that |
| 296 | * the kernel can handle, and then we build all the user-level signal handling |
| 297 | * stack-frames in one go after that. |
| 298 | */ |
Al Viro | 8314019 | 2012-04-24 02:21:18 -0400 | [diff] [blame] | 299 | static void do_signal(struct pt_regs *regs, int in_syscall) |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 300 | { |
Richard Weinberger | 9c53c7e | 2013-10-07 14:14:38 +0200 | [diff] [blame] | 301 | struct ksignal ksig; |
| 302 | |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 303 | #ifdef DEBUG_SIG |
Michal Simek | 6bd55f0 | 2012-12-27 10:40:38 +0100 | [diff] [blame] | 304 | pr_info("do signal: %p %d\n", regs, in_syscall); |
| 305 | pr_info("do signal2: %lx %lx %ld [%lx]\n", regs->pc, regs->r1, |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 306 | regs->r12, current_thread_info()->flags); |
| 307 | #endif |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 308 | |
Richard Weinberger | 9c53c7e | 2013-10-07 14:14:38 +0200 | [diff] [blame] | 309 | if (get_signal(&ksig)) { |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 310 | /* Whee! Actually deliver the signal. */ |
| 311 | if (in_syscall) |
Richard Weinberger | 9c53c7e | 2013-10-07 14:14:38 +0200 | [diff] [blame] | 312 | handle_restart(regs, &ksig.ka, 1); |
| 313 | handle_signal(&ksig, regs); |
Al Viro | 8314019 | 2012-04-24 02:21:18 -0400 | [diff] [blame] | 314 | return; |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 315 | } |
| 316 | |
| 317 | if (in_syscall) |
| 318 | handle_restart(regs, NULL, 0); |
| 319 | |
Arnd Bergmann | 3183e06 | 2009-06-18 19:55:29 +0200 | [diff] [blame] | 320 | /* |
| 321 | * If there's no signal to deliver, we just put the saved sigmask |
| 322 | * back. |
| 323 | */ |
Al Viro | 51a7b44 | 2012-05-21 23:33:55 -0400 | [diff] [blame] | 324 | restore_saved_sigmask(); |
Michal Simek | 2148daa9 | 2009-03-27 14:25:14 +0100 | [diff] [blame] | 325 | } |
Al Viro | 969a961 | 2012-04-24 02:03:06 -0400 | [diff] [blame] | 326 | |
Michal Simek | 4378bb6 | 2012-12-13 18:03:50 +0100 | [diff] [blame] | 327 | asmlinkage void do_notify_resume(struct pt_regs *regs, int in_syscall) |
Al Viro | 969a961 | 2012-04-24 02:03:06 -0400 | [diff] [blame] | 328 | { |
Al Viro | 969a961 | 2012-04-24 02:03:06 -0400 | [diff] [blame] | 329 | if (test_thread_flag(TIF_SIGPENDING)) |
Al Viro | 8314019 | 2012-04-24 02:21:18 -0400 | [diff] [blame] | 330 | do_signal(regs, in_syscall); |
Al Viro | 969a961 | 2012-04-24 02:03:06 -0400 | [diff] [blame] | 331 | |
Al Viro | a42c6de | 2012-05-23 14:44:37 -0400 | [diff] [blame] | 332 | if (test_and_clear_thread_flag(TIF_NOTIFY_RESUME)) |
Al Viro | 969a961 | 2012-04-24 02:03:06 -0400 | [diff] [blame] | 333 | tracehook_notify_resume(regs); |
Al Viro | 969a961 | 2012-04-24 02:03:06 -0400 | [diff] [blame] | 334 | } |