Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/x86_64/ia32/ia32_signal.c |
| 3 | * |
| 4 | * Copyright (C) 1991, 1992 Linus Torvalds |
| 5 | * |
| 6 | * 1997-11-28 Modified for POSIX.1b signals by Richard Henderson |
| 7 | * 2000-06-20 Pentium III FXSR, SSE support by Gareth Hughes |
| 8 | * 2000-12-* x86-64 compatibility mode signal handling by Andi Kleen |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | */ |
| 10 | |
| 11 | #include <linux/sched.h> |
| 12 | #include <linux/mm.h> |
| 13 | #include <linux/smp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/kernel.h> |
| 15 | #include <linux/signal.h> |
| 16 | #include <linux/errno.h> |
| 17 | #include <linux/wait.h> |
| 18 | #include <linux/ptrace.h> |
| 19 | #include <linux/unistd.h> |
| 20 | #include <linux/stddef.h> |
| 21 | #include <linux/personality.h> |
| 22 | #include <linux/compat.h> |
Andi Kleen | 9fbbd4d | 2007-02-13 13:26:26 +0100 | [diff] [blame] | 23 | #include <linux/binfmts.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <asm/ucontext.h> |
| 25 | #include <asm/uaccess.h> |
| 26 | #include <asm/i387.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <asm/ptrace.h> |
| 28 | #include <asm/ia32_unistd.h> |
| 29 | #include <asm/user32.h> |
| 30 | #include <asm/sigcontext32.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <asm/proto.h> |
Roland McGrath | af65d64 | 2008-01-30 13:30:43 +0100 | [diff] [blame] | 32 | #include <asm/vdso.h> |
Hiroshi Shimamoto | d98f9d8 | 2008-12-17 18:52:45 -0800 | [diff] [blame] | 33 | #include <asm/sigframe.h> |
Jaswinder Singh Rajput | 2f06de0 | 2008-12-27 21:37:10 +0530 | [diff] [blame] | 34 | #include <asm/sys_ia32.h> |
Hiroshi Shimamoto | d98f9d8 | 2008-12-17 18:52:45 -0800 | [diff] [blame] | 35 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #define DEBUG_SIG 0 |
| 37 | |
| 38 | #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) |
| 39 | |
Hiroshi Shimamoto | fbdb7da | 2008-07-14 15:34:09 -0700 | [diff] [blame] | 40 | #define FIX_EFLAGS (X86_EFLAGS_AC | X86_EFLAGS_OF | \ |
| 41 | X86_EFLAGS_DF | X86_EFLAGS_TF | X86_EFLAGS_SF | \ |
| 42 | X86_EFLAGS_ZF | X86_EFLAGS_AF | X86_EFLAGS_PF | \ |
| 43 | X86_EFLAGS_CF) |
| 44 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | void signal_fault(struct pt_regs *regs, void __user *frame, char *where); |
| 46 | |
| 47 | int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from) |
| 48 | { |
Hiroshi Shimamoto | 3b4b757 | 2009-01-23 15:50:38 -0800 | [diff] [blame^] | 49 | int err = 0; |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 50 | |
| 51 | if (!access_ok(VERIFY_WRITE, to, sizeof(compat_siginfo_t))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | return -EFAULT; |
| 53 | |
Hiroshi Shimamoto | 3b4b757 | 2009-01-23 15:50:38 -0800 | [diff] [blame^] | 54 | put_user_try { |
| 55 | /* If you change siginfo_t structure, please make sure that |
| 56 | this code is fixed accordingly. |
| 57 | It should never copy any pad contained in the structure |
| 58 | to avoid security leaks, but must copy the generic |
| 59 | 3 ints plus the relevant union member. */ |
| 60 | put_user_ex(from->si_signo, &to->si_signo); |
| 61 | put_user_ex(from->si_errno, &to->si_errno); |
| 62 | put_user_ex((short)from->si_code, &to->si_code); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
Hiroshi Shimamoto | 3b4b757 | 2009-01-23 15:50:38 -0800 | [diff] [blame^] | 64 | if (from->si_code < 0) { |
| 65 | put_user_ex(from->si_pid, &to->si_pid); |
| 66 | put_user_ex(from->si_uid, &to->si_uid); |
| 67 | put_user_ex(ptr_to_compat(from->si_ptr), &to->si_ptr); |
| 68 | } else { |
| 69 | /* |
| 70 | * First 32bits of unions are always present: |
| 71 | * si_pid === si_band === si_tid === si_addr(LS half) |
| 72 | */ |
| 73 | put_user_ex(from->_sifields._pad[0], |
| 74 | &to->_sifields._pad[0]); |
| 75 | switch (from->si_code >> 16) { |
| 76 | case __SI_FAULT >> 16: |
| 77 | break; |
| 78 | case __SI_CHLD >> 16: |
| 79 | put_user_ex(from->si_utime, &to->si_utime); |
| 80 | put_user_ex(from->si_stime, &to->si_stime); |
| 81 | put_user_ex(from->si_status, &to->si_status); |
| 82 | /* FALL THROUGH */ |
| 83 | default: |
| 84 | case __SI_KILL >> 16: |
| 85 | put_user_ex(from->si_uid, &to->si_uid); |
| 86 | break; |
| 87 | case __SI_POLL >> 16: |
| 88 | put_user_ex(from->si_fd, &to->si_fd); |
| 89 | break; |
| 90 | case __SI_TIMER >> 16: |
| 91 | put_user_ex(from->si_overrun, &to->si_overrun); |
| 92 | put_user_ex(ptr_to_compat(from->si_ptr), |
| 93 | &to->si_ptr); |
| 94 | break; |
| 95 | /* This is not generated by the kernel as of now. */ |
| 96 | case __SI_RT >> 16: |
| 97 | case __SI_MESGQ >> 16: |
| 98 | put_user_ex(from->si_uid, &to->si_uid); |
| 99 | put_user_ex(from->si_int, &to->si_int); |
| 100 | break; |
| 101 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | } |
Hiroshi Shimamoto | 3b4b757 | 2009-01-23 15:50:38 -0800 | [diff] [blame^] | 103 | } put_user_catch(err); |
| 104 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | return err; |
| 106 | } |
| 107 | |
| 108 | int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from) |
| 109 | { |
Hiroshi Shimamoto | 3b4b757 | 2009-01-23 15:50:38 -0800 | [diff] [blame^] | 110 | int err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | u32 ptr32; |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 112 | |
| 113 | if (!access_ok(VERIFY_READ, from, sizeof(compat_siginfo_t))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | return -EFAULT; |
| 115 | |
Hiroshi Shimamoto | 3b4b757 | 2009-01-23 15:50:38 -0800 | [diff] [blame^] | 116 | get_user_try { |
| 117 | get_user_ex(to->si_signo, &from->si_signo); |
| 118 | get_user_ex(to->si_errno, &from->si_errno); |
| 119 | get_user_ex(to->si_code, &from->si_code); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | |
Hiroshi Shimamoto | 3b4b757 | 2009-01-23 15:50:38 -0800 | [diff] [blame^] | 121 | get_user_ex(to->si_pid, &from->si_pid); |
| 122 | get_user_ex(to->si_uid, &from->si_uid); |
| 123 | get_user_ex(ptr32, &from->si_ptr); |
| 124 | to->si_ptr = compat_ptr(ptr32); |
| 125 | } get_user_catch(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | |
| 127 | return err; |
| 128 | } |
| 129 | |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 130 | asmlinkage long sys32_sigsuspend(int history0, int history1, old_sigset_t mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | mask &= _BLOCKABLE; |
| 133 | spin_lock_irq(¤t->sighand->siglock); |
Andi Kleen | 1d001df | 2006-09-26 10:52:26 +0200 | [diff] [blame] | 134 | current->saved_sigmask = current->blocked; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | siginitset(¤t->blocked, mask); |
| 136 | recalc_sigpending(); |
| 137 | spin_unlock_irq(¤t->sighand->siglock); |
| 138 | |
Andi Kleen | 1d001df | 2006-09-26 10:52:26 +0200 | [diff] [blame] | 139 | current->state = TASK_INTERRUPTIBLE; |
| 140 | schedule(); |
Roland McGrath | 5a8da0e | 2008-04-30 00:53:10 -0700 | [diff] [blame] | 141 | set_restore_sigmask(); |
Andi Kleen | 1d001df | 2006-09-26 10:52:26 +0200 | [diff] [blame] | 142 | return -ERESTARTNOHAND; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | } |
| 144 | |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 145 | asmlinkage long sys32_sigaltstack(const stack_ia32_t __user *uss_ptr, |
| 146 | stack_ia32_t __user *uoss_ptr, |
| 147 | struct pt_regs *regs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | { |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 149 | stack_t uss, uoss; |
Hiroshi Shimamoto | 3b4b757 | 2009-01-23 15:50:38 -0800 | [diff] [blame^] | 150 | int ret, err = 0; |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 151 | mm_segment_t seg; |
| 152 | |
| 153 | if (uss_ptr) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | u32 ptr; |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 155 | |
| 156 | memset(&uss, 0, sizeof(stack_t)); |
Hiroshi Shimamoto | 3b4b757 | 2009-01-23 15:50:38 -0800 | [diff] [blame^] | 157 | if (!access_ok(VERIFY_READ, uss_ptr, sizeof(stack_ia32_t))) |
| 158 | return -EFAULT; |
| 159 | |
| 160 | get_user_try { |
| 161 | get_user_ex(ptr, &uss_ptr->ss_sp); |
| 162 | get_user_ex(uss.ss_flags, &uss_ptr->ss_flags); |
| 163 | get_user_ex(uss.ss_size, &uss_ptr->ss_size); |
| 164 | } get_user_catch(err); |
| 165 | |
| 166 | if (err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | return -EFAULT; |
| 168 | uss.ss_sp = compat_ptr(ptr); |
| 169 | } |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 170 | seg = get_fs(); |
| 171 | set_fs(KERNEL_DS); |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 172 | ret = do_sigaltstack(uss_ptr ? &uss : NULL, &uoss, regs->sp); |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 173 | set_fs(seg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | if (ret >= 0 && uoss_ptr) { |
Hiroshi Shimamoto | 3b4b757 | 2009-01-23 15:50:38 -0800 | [diff] [blame^] | 175 | if (!access_ok(VERIFY_WRITE, uoss_ptr, sizeof(stack_ia32_t))) |
| 176 | return -EFAULT; |
| 177 | |
| 178 | put_user_try { |
| 179 | put_user_ex(ptr_to_compat(uoss.ss_sp), &uoss_ptr->ss_sp); |
| 180 | put_user_ex(uoss.ss_flags, &uoss_ptr->ss_flags); |
| 181 | put_user_ex(uoss.ss_size, &uoss_ptr->ss_size); |
| 182 | } put_user_catch(err); |
| 183 | |
| 184 | if (err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | ret = -EFAULT; |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 186 | } |
| 187 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | } |
| 189 | |
| 190 | /* |
| 191 | * Do a signal return; undo the signal stack. |
| 192 | */ |
Hiroshi Shimamoto | b78a5b5 | 2008-11-17 15:44:50 -0800 | [diff] [blame] | 193 | #define COPY(x) { \ |
Hiroshi Shimamoto | 3b4b757 | 2009-01-23 15:50:38 -0800 | [diff] [blame^] | 194 | get_user_ex(regs->x, &sc->x); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | } |
| 196 | |
Hiroshi Shimamoto | d71a68d | 2008-11-17 15:47:06 -0800 | [diff] [blame] | 197 | #define COPY_SEG_CPL3(seg) { \ |
| 198 | unsigned short tmp; \ |
Hiroshi Shimamoto | 3b4b757 | 2009-01-23 15:50:38 -0800 | [diff] [blame^] | 199 | get_user_ex(tmp, &sc->seg); \ |
Hiroshi Shimamoto | d71a68d | 2008-11-17 15:47:06 -0800 | [diff] [blame] | 200 | regs->seg = tmp | 3; \ |
| 201 | } |
| 202 | |
Hiroshi Shimamoto | 8c6e5ce | 2008-11-17 15:47:48 -0800 | [diff] [blame] | 203 | #define RELOAD_SEG(seg) { \ |
| 204 | unsigned int cur, pre; \ |
Hiroshi Shimamoto | 3b4b757 | 2009-01-23 15:50:38 -0800 | [diff] [blame^] | 205 | get_user_ex(pre, &sc->seg); \ |
Hiroshi Shimamoto | 8c6e5ce | 2008-11-17 15:47:48 -0800 | [diff] [blame] | 206 | savesegment(seg, cur); \ |
| 207 | pre |= 3; \ |
| 208 | if (pre != cur) \ |
| 209 | loadsegment(seg, pre); \ |
| 210 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 212 | static int ia32_restore_sigcontext(struct pt_regs *regs, |
| 213 | struct sigcontext_ia32 __user *sc, |
Hiroshi Shimamoto | 047ce93 | 2008-11-17 15:48:27 -0800 | [diff] [blame] | 214 | unsigned int *pax) |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 215 | { |
| 216 | unsigned int tmpflags, gs, oldgs, err = 0; |
Suresh Siddha | ab51370 | 2008-07-29 10:29:22 -0700 | [diff] [blame] | 217 | void __user *buf; |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 218 | u32 tmp; |
| 219 | |
| 220 | /* Always make any pending restarted system calls return -EINTR */ |
| 221 | current_thread_info()->restart_block.fn = do_no_restart_syscall; |
| 222 | |
| 223 | #if DEBUG_SIG |
| 224 | printk(KERN_DEBUG "SIG restore_sigcontext: " |
| 225 | "sc=%p err(%x) eip(%x) cs(%x) flg(%x)\n", |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 226 | sc, sc->err, sc->ip, sc->cs, sc->flags); |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 227 | #endif |
| 228 | |
Hiroshi Shimamoto | 3b4b757 | 2009-01-23 15:50:38 -0800 | [diff] [blame^] | 229 | get_user_try { |
| 230 | /* |
| 231 | * Reload fs and gs if they have changed in the signal |
| 232 | * handler. This does not handle long fs/gs base changes in |
| 233 | * the handler, but does not clobber them at least in the |
| 234 | * normal case. |
| 235 | */ |
| 236 | get_user_ex(gs, &sc->gs); |
| 237 | gs |= 3; |
| 238 | savesegment(gs, oldgs); |
| 239 | if (gs != oldgs) |
| 240 | load_gs_index(gs); |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 241 | |
Hiroshi Shimamoto | 3b4b757 | 2009-01-23 15:50:38 -0800 | [diff] [blame^] | 242 | RELOAD_SEG(fs); |
| 243 | RELOAD_SEG(ds); |
| 244 | RELOAD_SEG(es); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | |
Hiroshi Shimamoto | 3b4b757 | 2009-01-23 15:50:38 -0800 | [diff] [blame^] | 246 | COPY(di); COPY(si); COPY(bp); COPY(sp); COPY(bx); |
| 247 | COPY(dx); COPY(cx); COPY(ip); |
| 248 | /* Don't touch extended registers */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | |
Hiroshi Shimamoto | 3b4b757 | 2009-01-23 15:50:38 -0800 | [diff] [blame^] | 250 | COPY_SEG_CPL3(cs); |
| 251 | COPY_SEG_CPL3(ss); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | |
Hiroshi Shimamoto | 3b4b757 | 2009-01-23 15:50:38 -0800 | [diff] [blame^] | 253 | get_user_ex(tmpflags, &sc->flags); |
| 254 | regs->flags = (regs->flags & ~FIX_EFLAGS) | (tmpflags & FIX_EFLAGS); |
| 255 | /* disable syscall checks */ |
| 256 | regs->orig_ax = -1; |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 257 | |
Hiroshi Shimamoto | 3b4b757 | 2009-01-23 15:50:38 -0800 | [diff] [blame^] | 258 | get_user_ex(tmp, &sc->fpstate); |
| 259 | buf = compat_ptr(tmp); |
| 260 | err |= restore_i387_xstate_ia32(buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | |
Hiroshi Shimamoto | 3b4b757 | 2009-01-23 15:50:38 -0800 | [diff] [blame^] | 262 | get_user_ex(*pax, &sc->ax); |
| 263 | } get_user_catch(err); |
| 264 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | } |
| 267 | |
| 268 | asmlinkage long sys32_sigreturn(struct pt_regs *regs) |
| 269 | { |
Hiroshi Shimamoto | 3b0d29e | 2008-12-17 18:51:46 -0800 | [diff] [blame] | 270 | struct sigframe_ia32 __user *frame = (struct sigframe_ia32 __user *)(regs->sp-8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | sigset_t set; |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 272 | unsigned int ax; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | |
| 274 | if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) |
| 275 | goto badframe; |
| 276 | if (__get_user(set.sig[0], &frame->sc.oldmask) |
| 277 | || (_COMPAT_NSIG_WORDS > 1 |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 278 | && __copy_from_user((((char *) &set.sig) + 4), |
| 279 | &frame->extramask, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | sizeof(frame->extramask)))) |
| 281 | goto badframe; |
| 282 | |
| 283 | sigdelsetmask(&set, ~_BLOCKABLE); |
| 284 | spin_lock_irq(¤t->sighand->siglock); |
| 285 | current->blocked = set; |
| 286 | recalc_sigpending(); |
| 287 | spin_unlock_irq(¤t->sighand->siglock); |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 288 | |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 289 | if (ia32_restore_sigcontext(regs, &frame->sc, &ax)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | goto badframe; |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 291 | return ax; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | |
| 293 | badframe: |
| 294 | signal_fault(regs, frame, "32bit sigreturn"); |
| 295 | return 0; |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 296 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | |
| 298 | asmlinkage long sys32_rt_sigreturn(struct pt_regs *regs) |
| 299 | { |
Hiroshi Shimamoto | 3b0d29e | 2008-12-17 18:51:46 -0800 | [diff] [blame] | 300 | struct rt_sigframe_ia32 __user *frame; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | sigset_t set; |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 302 | unsigned int ax; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | struct pt_regs tregs; |
| 304 | |
Hiroshi Shimamoto | 3b0d29e | 2008-12-17 18:51:46 -0800 | [diff] [blame] | 305 | frame = (struct rt_sigframe_ia32 __user *)(regs->sp - 4); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | |
| 307 | if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) |
| 308 | goto badframe; |
| 309 | if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set))) |
| 310 | goto badframe; |
| 311 | |
| 312 | sigdelsetmask(&set, ~_BLOCKABLE); |
| 313 | spin_lock_irq(¤t->sighand->siglock); |
| 314 | current->blocked = set; |
| 315 | recalc_sigpending(); |
| 316 | spin_unlock_irq(¤t->sighand->siglock); |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 317 | |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 318 | if (ia32_restore_sigcontext(regs, &frame->uc.uc_mcontext, &ax)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | goto badframe; |
| 320 | |
| 321 | tregs = *regs; |
| 322 | if (sys32_sigaltstack(&frame->uc.uc_stack, NULL, &tregs) == -EFAULT) |
| 323 | goto badframe; |
| 324 | |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 325 | return ax; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | |
| 327 | badframe: |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 328 | signal_fault(regs, frame, "32bit rt sigreturn"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | return 0; |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 330 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | |
| 332 | /* |
| 333 | * Set up a signal frame. |
| 334 | */ |
| 335 | |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 336 | static int ia32_setup_sigcontext(struct sigcontext_ia32 __user *sc, |
Suresh Siddha | ab51370 | 2008-07-29 10:29:22 -0700 | [diff] [blame] | 337 | void __user *fpstate, |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 338 | struct pt_regs *regs, unsigned int mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | { |
| 340 | int tmp, err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | |
Hiroshi Shimamoto | 3b4b757 | 2009-01-23 15:50:38 -0800 | [diff] [blame^] | 342 | put_user_try { |
| 343 | savesegment(gs, tmp); |
| 344 | put_user_ex(tmp, (unsigned int __user *)&sc->gs); |
| 345 | savesegment(fs, tmp); |
| 346 | put_user_ex(tmp, (unsigned int __user *)&sc->fs); |
| 347 | savesegment(ds, tmp); |
| 348 | put_user_ex(tmp, (unsigned int __user *)&sc->ds); |
| 349 | savesegment(es, tmp); |
| 350 | put_user_ex(tmp, (unsigned int __user *)&sc->es); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | |
Hiroshi Shimamoto | 3b4b757 | 2009-01-23 15:50:38 -0800 | [diff] [blame^] | 352 | put_user_ex(regs->di, &sc->di); |
| 353 | put_user_ex(regs->si, &sc->si); |
| 354 | put_user_ex(regs->bp, &sc->bp); |
| 355 | put_user_ex(regs->sp, &sc->sp); |
| 356 | put_user_ex(regs->bx, &sc->bx); |
| 357 | put_user_ex(regs->dx, &sc->dx); |
| 358 | put_user_ex(regs->cx, &sc->cx); |
| 359 | put_user_ex(regs->ax, &sc->ax); |
| 360 | put_user_ex(current->thread.trap_no, &sc->trapno); |
| 361 | put_user_ex(current->thread.error_code, &sc->err); |
| 362 | put_user_ex(regs->ip, &sc->ip); |
| 363 | put_user_ex(regs->cs, (unsigned int __user *)&sc->cs); |
| 364 | put_user_ex(regs->flags, &sc->flags); |
| 365 | put_user_ex(regs->sp, &sc->sp_at_signal); |
| 366 | put_user_ex(regs->ss, (unsigned int __user *)&sc->ss); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | |
Hiroshi Shimamoto | 3b4b757 | 2009-01-23 15:50:38 -0800 | [diff] [blame^] | 368 | put_user_ex(ptr_to_compat(fpstate), &sc->fpstate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | |
Hiroshi Shimamoto | 3b4b757 | 2009-01-23 15:50:38 -0800 | [diff] [blame^] | 370 | /* non-iBCS2 extensions.. */ |
| 371 | put_user_ex(mask, &sc->oldmask); |
| 372 | put_user_ex(current->thread.cr2, &sc->cr2); |
| 373 | } put_user_catch(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | |
| 375 | return err; |
| 376 | } |
| 377 | |
| 378 | /* |
| 379 | * Determine which stack to use.. |
| 380 | */ |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 381 | static void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, |
Suresh Siddha | 3c1c7f1 | 2008-07-29 10:29:21 -0700 | [diff] [blame] | 382 | size_t frame_size, |
Suresh Siddha | ab51370 | 2008-07-29 10:29:22 -0700 | [diff] [blame] | 383 | void **fpstate) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | { |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 385 | unsigned long sp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | |
| 387 | /* Default to using normal stack */ |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 388 | sp = regs->sp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | |
| 390 | /* This is the X/Open sanctioned signal stack switching. */ |
| 391 | if (ka->sa.sa_flags & SA_ONSTACK) { |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 392 | if (sas_ss_flags(sp) == 0) |
| 393 | sp = current->sas_ss_sp + current->sas_ss_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | } |
| 395 | |
| 396 | /* This is the legacy signal stack switching. */ |
Hiroshi Shimamoto | 8bee3f0 | 2008-12-16 14:04:43 -0800 | [diff] [blame] | 397 | else if ((regs->ss & 0xffff) != __USER32_DS && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | !(ka->sa.sa_flags & SA_RESTORER) && |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 399 | ka->sa.sa_restorer) |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 400 | sp = (unsigned long) ka->sa.sa_restorer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | |
Suresh Siddha | 3c1c7f1 | 2008-07-29 10:29:21 -0700 | [diff] [blame] | 402 | if (used_math()) { |
| 403 | sp = sp - sig_xstate_ia32_size; |
| 404 | *fpstate = (struct _fpstate_ia32 *) sp; |
Hiroshi Shimamoto | 99ea1b93 | 2008-11-05 18:32:54 -0800 | [diff] [blame] | 405 | if (save_i387_xstate_ia32(*fpstate) < 0) |
| 406 | return (void __user *) -1L; |
Suresh Siddha | 3c1c7f1 | 2008-07-29 10:29:21 -0700 | [diff] [blame] | 407 | } |
| 408 | |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 409 | sp -= frame_size; |
Markus F.X.J. Oberhumer | d347f37 | 2005-10-09 18:54:23 +0200 | [diff] [blame] | 410 | /* Align the stack pointer according to the i386 ABI, |
| 411 | * i.e. so that on function entry ((sp + 4) & 15) == 0. */ |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 412 | sp = ((sp + 4) & -16ul) - 4; |
| 413 | return (void __user *) sp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | } |
| 415 | |
Roland McGrath | 0928d6e | 2005-06-23 00:08:37 -0700 | [diff] [blame] | 416 | int ia32_setup_frame(int sig, struct k_sigaction *ka, |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 417 | compat_sigset_t *set, struct pt_regs *regs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | { |
Hiroshi Shimamoto | 3b0d29e | 2008-12-17 18:51:46 -0800 | [diff] [blame] | 419 | struct sigframe_ia32 __user *frame; |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 420 | void __user *restorer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | int err = 0; |
Suresh Siddha | ab51370 | 2008-07-29 10:29:22 -0700 | [diff] [blame] | 422 | void __user *fpstate = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 424 | /* copy_to_user optimizes that into a single 8 byte store */ |
| 425 | static const struct { |
| 426 | u16 poplmovl; |
| 427 | u32 val; |
| 428 | u16 int80; |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 429 | } __attribute__((packed)) code = { |
| 430 | 0xb858, /* popl %eax ; movl $...,%eax */ |
| 431 | __NR_ia32_sigreturn, |
| 432 | 0x80cd, /* int $0x80 */ |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 433 | }; |
| 434 | |
Suresh Siddha | 3c1c7f1 | 2008-07-29 10:29:21 -0700 | [diff] [blame] | 435 | frame = get_sigframe(ka, regs, sizeof(*frame), &fpstate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | |
| 437 | if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) |
Hiroshi Shimamoto | 3d0aedd | 2008-09-12 17:01:09 -0700 | [diff] [blame] | 438 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | |
Hiroshi Shimamoto | 2ba48e1 | 2008-09-12 17:02:53 -0700 | [diff] [blame] | 440 | if (__put_user(sig, &frame->sig)) |
Hiroshi Shimamoto | 3d0aedd | 2008-09-12 17:01:09 -0700 | [diff] [blame] | 441 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | |
Hiroshi Shimamoto | 2ba48e1 | 2008-09-12 17:02:53 -0700 | [diff] [blame] | 443 | if (ia32_setup_sigcontext(&frame->sc, fpstate, regs, set->sig[0])) |
Hiroshi Shimamoto | 3d0aedd | 2008-09-12 17:01:09 -0700 | [diff] [blame] | 444 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | |
| 446 | if (_COMPAT_NSIG_WORDS > 1) { |
Hiroshi Shimamoto | 2ba48e1 | 2008-09-12 17:02:53 -0700 | [diff] [blame] | 447 | if (__copy_to_user(frame->extramask, &set->sig[1], |
| 448 | sizeof(frame->extramask))) |
Hiroshi Shimamoto | 3d0aedd | 2008-09-12 17:01:09 -0700 | [diff] [blame] | 449 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | |
Roland McGrath | af65d64 | 2008-01-30 13:30:43 +0100 | [diff] [blame] | 452 | if (ka->sa.sa_flags & SA_RESTORER) { |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 453 | restorer = ka->sa.sa_restorer; |
Roland McGrath | af65d64 | 2008-01-30 13:30:43 +0100 | [diff] [blame] | 454 | } else { |
| 455 | /* Return stub is in 32bit vsyscall page */ |
Roland McGrath | 1a3e4ca | 2008-04-09 01:29:27 -0700 | [diff] [blame] | 456 | if (current->mm->context.vdso) |
Roland McGrath | af65d64 | 2008-01-30 13:30:43 +0100 | [diff] [blame] | 457 | restorer = VDSO32_SYMBOL(current->mm->context.vdso, |
| 458 | sigreturn); |
| 459 | else |
Jan Engelhardt | ade1af7 | 2008-01-30 13:33:23 +0100 | [diff] [blame] | 460 | restorer = &frame->retcode; |
Roland McGrath | af65d64 | 2008-01-30 13:30:43 +0100 | [diff] [blame] | 461 | } |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 462 | |
Hiroshi Shimamoto | 3b4b757 | 2009-01-23 15:50:38 -0800 | [diff] [blame^] | 463 | put_user_try { |
| 464 | put_user_ex(ptr_to_compat(restorer), &frame->pretcode); |
| 465 | |
| 466 | /* |
| 467 | * These are actually not used anymore, but left because some |
| 468 | * gdb versions depend on them as a marker. |
| 469 | */ |
| 470 | put_user_ex(*((u64 *)&code), (u64 *)frame->retcode); |
| 471 | } put_user_catch(err); |
| 472 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | if (err) |
Hiroshi Shimamoto | 3d0aedd | 2008-09-12 17:01:09 -0700 | [diff] [blame] | 474 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | |
| 476 | /* Set up registers for signal handler */ |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 477 | regs->sp = (unsigned long) frame; |
| 478 | regs->ip = (unsigned long) ka->sa.sa_handler; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | |
Andi Kleen | 536e3ee | 2006-09-26 10:52:41 +0200 | [diff] [blame] | 480 | /* Make -mregparm=3 work */ |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 481 | regs->ax = sig; |
| 482 | regs->dx = 0; |
| 483 | regs->cx = 0; |
Andi Kleen | 536e3ee | 2006-09-26 10:52:41 +0200 | [diff] [blame] | 484 | |
Jeremy Fitzhardinge | b6edbb1 | 2008-08-19 13:04:19 -0700 | [diff] [blame] | 485 | loadsegment(ds, __USER32_DS); |
| 486 | loadsegment(es, __USER32_DS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 488 | regs->cs = __USER32_CS; |
| 489 | regs->ss = __USER32_DS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | #if DEBUG_SIG |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 492 | printk(KERN_DEBUG "SIG deliver (%s:%d): sp=%p pc=%lx ra=%u\n", |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 493 | current->comm, current->pid, frame, regs->ip, frame->pretcode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | #endif |
| 495 | |
Andi Kleen | 1d001df | 2006-09-26 10:52:26 +0200 | [diff] [blame] | 496 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | } |
| 498 | |
Roland McGrath | 0928d6e | 2005-06-23 00:08:37 -0700 | [diff] [blame] | 499 | int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 500 | compat_sigset_t *set, struct pt_regs *regs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | { |
Hiroshi Shimamoto | 3b0d29e | 2008-12-17 18:51:46 -0800 | [diff] [blame] | 502 | struct rt_sigframe_ia32 __user *frame; |
Roland McGrath | af65d64 | 2008-01-30 13:30:43 +0100 | [diff] [blame] | 503 | void __user *restorer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | int err = 0; |
Suresh Siddha | ab51370 | 2008-07-29 10:29:22 -0700 | [diff] [blame] | 505 | void __user *fpstate = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 507 | /* __copy_to_user optimizes that into a single 8 byte store */ |
| 508 | static const struct { |
| 509 | u8 movl; |
| 510 | u32 val; |
| 511 | u16 int80; |
Hiroshi Shimamoto | 9cc3c49 | 2008-11-11 19:11:39 -0800 | [diff] [blame] | 512 | u8 pad; |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 513 | } __attribute__((packed)) code = { |
| 514 | 0xb8, |
| 515 | __NR_ia32_rt_sigreturn, |
| 516 | 0x80cd, |
| 517 | 0, |
| 518 | }; |
| 519 | |
Suresh Siddha | 3c1c7f1 | 2008-07-29 10:29:21 -0700 | [diff] [blame] | 520 | frame = get_sigframe(ka, regs, sizeof(*frame), &fpstate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | |
| 522 | if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) |
Hiroshi Shimamoto | 3d0aedd | 2008-09-12 17:01:09 -0700 | [diff] [blame] | 523 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | |
Hiroshi Shimamoto | 3b4b757 | 2009-01-23 15:50:38 -0800 | [diff] [blame^] | 525 | put_user_try { |
| 526 | put_user_ex(sig, &frame->sig); |
| 527 | put_user_ex(ptr_to_compat(&frame->info), &frame->pinfo); |
| 528 | put_user_ex(ptr_to_compat(&frame->uc), &frame->puc); |
| 529 | err |= copy_siginfo_to_user32(&frame->info, info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | |
Hiroshi Shimamoto | 3b4b757 | 2009-01-23 15:50:38 -0800 | [diff] [blame^] | 531 | /* Create the ucontext. */ |
| 532 | if (cpu_has_xsave) |
| 533 | put_user_ex(UC_FP_XSTATE, &frame->uc.uc_flags); |
| 534 | else |
| 535 | put_user_ex(0, &frame->uc.uc_flags); |
| 536 | put_user_ex(0, &frame->uc.uc_link); |
| 537 | put_user_ex(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp); |
| 538 | put_user_ex(sas_ss_flags(regs->sp), |
| 539 | &frame->uc.uc_stack.ss_flags); |
| 540 | put_user_ex(current->sas_ss_size, &frame->uc.uc_stack.ss_size); |
| 541 | err |= ia32_setup_sigcontext(&frame->uc.uc_mcontext, fpstate, |
| 542 | regs, set->sig[0]); |
| 543 | err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | |
Hiroshi Shimamoto | 3b4b757 | 2009-01-23 15:50:38 -0800 | [diff] [blame^] | 545 | if (ka->sa.sa_flags & SA_RESTORER) |
| 546 | restorer = ka->sa.sa_restorer; |
| 547 | else |
| 548 | restorer = VDSO32_SYMBOL(current->mm->context.vdso, |
| 549 | rt_sigreturn); |
| 550 | put_user_ex(ptr_to_compat(restorer), &frame->pretcode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | |
Hiroshi Shimamoto | 3b4b757 | 2009-01-23 15:50:38 -0800 | [diff] [blame^] | 552 | /* |
| 553 | * Not actually used anymore, but left because some gdb |
| 554 | * versions need it. |
| 555 | */ |
| 556 | put_user_ex(*((u64 *)&code), (u64 *)frame->retcode); |
| 557 | } put_user_catch(err); |
| 558 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | if (err) |
Hiroshi Shimamoto | 3d0aedd | 2008-09-12 17:01:09 -0700 | [diff] [blame] | 560 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | |
| 562 | /* Set up registers for signal handler */ |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 563 | regs->sp = (unsigned long) frame; |
| 564 | regs->ip = (unsigned long) ka->sa.sa_handler; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | |
Albert Cahalan | a7aacdf | 2006-10-29 22:26:17 -0500 | [diff] [blame] | 566 | /* Make -mregparm=3 work */ |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 567 | regs->ax = sig; |
| 568 | regs->dx = (unsigned long) &frame->info; |
| 569 | regs->cx = (unsigned long) &frame->uc; |
Albert Cahalan | a7aacdf | 2006-10-29 22:26:17 -0500 | [diff] [blame] | 570 | |
Jeremy Fitzhardinge | b6edbb1 | 2008-08-19 13:04:19 -0700 | [diff] [blame] | 571 | loadsegment(ds, __USER32_DS); |
| 572 | loadsegment(es, __USER32_DS); |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 573 | |
| 574 | regs->cs = __USER32_CS; |
| 575 | regs->ss = __USER32_DS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | #if DEBUG_SIG |
Thomas Gleixner | 99b9cdf | 2008-01-30 13:30:07 +0100 | [diff] [blame] | 578 | printk(KERN_DEBUG "SIG deliver (%s:%d): sp=%p pc=%lx ra=%u\n", |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 579 | current->comm, current->pid, frame, regs->ip, frame->pretcode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | #endif |
| 581 | |
Andi Kleen | 1d001df | 2006-09-26 10:52:26 +0200 | [diff] [blame] | 582 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | } |