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Commit | Line | Data |
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1da177e4 LT |
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 | |
1da177e4 LT |
9 | */ |
10 | ||
11 | #include <linux/sched.h> | |
12 | #include <linux/mm.h> | |
13 | #include <linux/smp.h> | |
1da177e4 | 14 | #include <linux/kernel.h> |
1da177e4 LT |
15 | #include <linux/errno.h> |
16 | #include <linux/wait.h> | |
1da177e4 LT |
17 | #include <linux/unistd.h> |
18 | #include <linux/stddef.h> | |
19 | #include <linux/personality.h> | |
20 | #include <linux/compat.h> | |
9fbbd4dd | 21 | #include <linux/binfmts.h> |
1da177e4 LT |
22 | #include <asm/ucontext.h> |
23 | #include <asm/uaccess.h> | |
1361b83a | 24 | #include <asm/fpu-internal.h> |
1da177e4 LT |
25 | #include <asm/ptrace.h> |
26 | #include <asm/ia32_unistd.h> | |
27 | #include <asm/user32.h> | |
28 | #include <asm/sigcontext32.h> | |
1da177e4 | 29 | #include <asm/proto.h> |
af65d648 | 30 | #include <asm/vdso.h> |
d98f9d84 | 31 | #include <asm/sigframe.h> |
f28f0c23 | 32 | #include <asm/sighandling.h> |
2f06de06 | 33 | #include <asm/sys_ia32.h> |
49b8c695 | 34 | #include <asm/smap.h> |
d98f9d84 | 35 | |
ce395960 | 36 | int copy_siginfo_to_user32(compat_siginfo_t __user *to, const siginfo_t *from) |
1da177e4 | 37 | { |
3b4b7570 | 38 | int err = 0; |
0b91f45b | 39 | bool ia32 = test_thread_flag(TIF_IA32); |
99b9cdf7 TG |
40 | |
41 | if (!access_ok(VERIFY_WRITE, to, sizeof(compat_siginfo_t))) | |
1da177e4 LT |
42 | return -EFAULT; |
43 | ||
3b4b7570 HS |
44 | put_user_try { |
45 | /* If you change siginfo_t structure, please make sure that | |
46 | this code is fixed accordingly. | |
47 | It should never copy any pad contained in the structure | |
48 | to avoid security leaks, but must copy the generic | |
49 | 3 ints plus the relevant union member. */ | |
50 | put_user_ex(from->si_signo, &to->si_signo); | |
51 | put_user_ex(from->si_errno, &to->si_errno); | |
52 | put_user_ex((short)from->si_code, &to->si_code); | |
53 | ||
54 | if (from->si_code < 0) { | |
55 | put_user_ex(from->si_pid, &to->si_pid); | |
56 | put_user_ex(from->si_uid, &to->si_uid); | |
57 | put_user_ex(ptr_to_compat(from->si_ptr), &to->si_ptr); | |
58 | } else { | |
59 | /* | |
60 | * First 32bits of unions are always present: | |
61 | * si_pid === si_band === si_tid === si_addr(LS half) | |
62 | */ | |
63 | put_user_ex(from->_sifields._pad[0], | |
64 | &to->_sifields._pad[0]); | |
65 | switch (from->si_code >> 16) { | |
66 | case __SI_FAULT >> 16: | |
67 | break; | |
a0727e8c WD |
68 | case __SI_SYS >> 16: |
69 | put_user_ex(from->si_syscall, &to->si_syscall); | |
70 | put_user_ex(from->si_arch, &to->si_arch); | |
71 | break; | |
3b4b7570 | 72 | case __SI_CHLD >> 16: |
e7084fd5 PA |
73 | if (ia32) { |
74 | put_user_ex(from->si_utime, &to->si_utime); | |
75 | put_user_ex(from->si_stime, &to->si_stime); | |
76 | } else { | |
77 | put_user_ex(from->si_utime, &to->_sifields._sigchld_x32._utime); | |
78 | put_user_ex(from->si_stime, &to->_sifields._sigchld_x32._stime); | |
79 | } | |
3b4b7570 HS |
80 | put_user_ex(from->si_status, &to->si_status); |
81 | /* FALL THROUGH */ | |
82 | default: | |
83 | case __SI_KILL >> 16: | |
84 | put_user_ex(from->si_uid, &to->si_uid); | |
85 | break; | |
86 | case __SI_POLL >> 16: | |
87 | put_user_ex(from->si_fd, &to->si_fd); | |
88 | break; | |
89 | case __SI_TIMER >> 16: | |
90 | put_user_ex(from->si_overrun, &to->si_overrun); | |
91 | put_user_ex(ptr_to_compat(from->si_ptr), | |
92 | &to->si_ptr); | |
93 | break; | |
94 | /* This is not generated by the kernel as of now. */ | |
95 | case __SI_RT >> 16: | |
96 | case __SI_MESGQ >> 16: | |
97 | put_user_ex(from->si_uid, &to->si_uid); | |
98 | put_user_ex(from->si_int, &to->si_int); | |
99 | break; | |
100 | } | |
1da177e4 | 101 | } |
3b4b7570 HS |
102 | } put_user_catch(err); |
103 | ||
1da177e4 LT |
104 | return err; |
105 | } | |
106 | ||
107 | int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from) | |
108 | { | |
3b4b7570 | 109 | int err = 0; |
1da177e4 | 110 | u32 ptr32; |
99b9cdf7 TG |
111 | |
112 | if (!access_ok(VERIFY_READ, from, sizeof(compat_siginfo_t))) | |
1da177e4 LT |
113 | return -EFAULT; |
114 | ||
3b4b7570 HS |
115 | get_user_try { |
116 | get_user_ex(to->si_signo, &from->si_signo); | |
117 | get_user_ex(to->si_errno, &from->si_errno); | |
118 | get_user_ex(to->si_code, &from->si_code); | |
1da177e4 | 119 | |
3b4b7570 HS |
120 | get_user_ex(to->si_pid, &from->si_pid); |
121 | get_user_ex(to->si_uid, &from->si_uid); | |
122 | get_user_ex(ptr32, &from->si_ptr); | |
123 | to->si_ptr = compat_ptr(ptr32); | |
124 | } get_user_catch(err); | |
1da177e4 LT |
125 | |
126 | return err; | |
127 | } | |
128 | ||
1da177e4 LT |
129 | /* |
130 | * Do a signal return; undo the signal stack. | |
131 | */ | |
a967bb3f HS |
132 | #define loadsegment_gs(v) load_gs_index(v) |
133 | #define loadsegment_fs(v) loadsegment(fs, v) | |
134 | #define loadsegment_ds(v) loadsegment(ds, v) | |
135 | #define loadsegment_es(v) loadsegment(es, v) | |
136 | ||
137 | #define get_user_seg(seg) ({ unsigned int v; savesegment(seg, v); v; }) | |
138 | #define set_user_seg(seg, v) loadsegment_##seg(v) | |
139 | ||
b78a5b52 | 140 | #define COPY(x) { \ |
3b4b7570 | 141 | get_user_ex(regs->x, &sc->x); \ |
1da177e4 | 142 | } |
1da177e4 | 143 | |
8801ead4 HS |
144 | #define GET_SEG(seg) ({ \ |
145 | unsigned short tmp; \ | |
146 | get_user_ex(tmp, &sc->seg); \ | |
147 | tmp; \ | |
148 | }) | |
149 | ||
150 | #define COPY_SEG_CPL3(seg) do { \ | |
151 | regs->seg = GET_SEG(seg) | 3; \ | |
152 | } while (0) | |
1da177e4 | 153 | |
8c6e5ce0 | 154 | #define RELOAD_SEG(seg) { \ |
a967bb3f HS |
155 | unsigned int pre = GET_SEG(seg); \ |
156 | unsigned int cur = get_user_seg(seg); \ | |
8c6e5ce0 HS |
157 | pre |= 3; \ |
158 | if (pre != cur) \ | |
a967bb3f | 159 | set_user_seg(seg, pre); \ |
8c6e5ce0 | 160 | } |
99b9cdf7 TG |
161 | |
162 | static int ia32_restore_sigcontext(struct pt_regs *regs, | |
6a3713f0 | 163 | struct sigcontext_ia32 __user *sc) |
99b9cdf7 | 164 | { |
a967bb3f | 165 | unsigned int tmpflags, err = 0; |
ab513701 | 166 | void __user *buf; |
99b9cdf7 TG |
167 | u32 tmp; |
168 | ||
169 | /* Always make any pending restarted system calls return -EINTR */ | |
f56141e3 | 170 | current->restart_block.fn = do_no_restart_syscall; |
99b9cdf7 | 171 | |
3b4b7570 HS |
172 | get_user_try { |
173 | /* | |
174 | * Reload fs and gs if they have changed in the signal | |
175 | * handler. This does not handle long fs/gs base changes in | |
176 | * the handler, but does not clobber them at least in the | |
177 | * normal case. | |
178 | */ | |
a967bb3f | 179 | RELOAD_SEG(gs); |
3b4b7570 HS |
180 | RELOAD_SEG(fs); |
181 | RELOAD_SEG(ds); | |
182 | RELOAD_SEG(es); | |
183 | ||
184 | COPY(di); COPY(si); COPY(bp); COPY(sp); COPY(bx); | |
6a3713f0 | 185 | COPY(dx); COPY(cx); COPY(ip); COPY(ax); |
3b4b7570 HS |
186 | /* Don't touch extended registers */ |
187 | ||
188 | COPY_SEG_CPL3(cs); | |
189 | COPY_SEG_CPL3(ss); | |
190 | ||
191 | get_user_ex(tmpflags, &sc->flags); | |
192 | regs->flags = (regs->flags & ~FIX_EFLAGS) | (tmpflags & FIX_EFLAGS); | |
193 | /* disable syscall checks */ | |
194 | regs->orig_ax = -1; | |
195 | ||
196 | get_user_ex(tmp, &sc->fpstate); | |
197 | buf = compat_ptr(tmp); | |
3b4b7570 HS |
198 | } get_user_catch(err); |
199 | ||
49b8c695 | 200 | err |= restore_xstate_sig(buf, 1); |
5e88353d | 201 | |
1daeaa31 BG |
202 | force_iret(); |
203 | ||
1da177e4 | 204 | return err; |
1da177e4 LT |
205 | } |
206 | ||
3fe26fa3 | 207 | asmlinkage long sys32_sigreturn(void) |
1da177e4 | 208 | { |
3fe26fa3 | 209 | struct pt_regs *regs = current_pt_regs(); |
3b0d29ee | 210 | struct sigframe_ia32 __user *frame = (struct sigframe_ia32 __user *)(regs->sp-8); |
1da177e4 | 211 | sigset_t set; |
1da177e4 LT |
212 | |
213 | if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) | |
214 | goto badframe; | |
215 | if (__get_user(set.sig[0], &frame->sc.oldmask) | |
216 | || (_COMPAT_NSIG_WORDS > 1 | |
99b9cdf7 TG |
217 | && __copy_from_user((((char *) &set.sig) + 4), |
218 | &frame->extramask, | |
1da177e4 LT |
219 | sizeof(frame->extramask)))) |
220 | goto badframe; | |
221 | ||
905f29e2 | 222 | set_current_blocked(&set); |
99b9cdf7 | 223 | |
6a3713f0 | 224 | if (ia32_restore_sigcontext(regs, &frame->sc)) |
1da177e4 | 225 | goto badframe; |
6a3713f0 | 226 | return regs->ax; |
1da177e4 LT |
227 | |
228 | badframe: | |
229 | signal_fault(regs, frame, "32bit sigreturn"); | |
230 | return 0; | |
99b9cdf7 | 231 | } |
1da177e4 | 232 | |
3fe26fa3 | 233 | asmlinkage long sys32_rt_sigreturn(void) |
1da177e4 | 234 | { |
3fe26fa3 | 235 | struct pt_regs *regs = current_pt_regs(); |
3b0d29ee | 236 | struct rt_sigframe_ia32 __user *frame; |
1da177e4 | 237 | sigset_t set; |
1da177e4 | 238 | |
3b0d29ee | 239 | frame = (struct rt_sigframe_ia32 __user *)(regs->sp - 4); |
1da177e4 LT |
240 | |
241 | if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) | |
242 | goto badframe; | |
243 | if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set))) | |
244 | goto badframe; | |
245 | ||
905f29e2 | 246 | set_current_blocked(&set); |
99b9cdf7 | 247 | |
6a3713f0 | 248 | if (ia32_restore_sigcontext(regs, &frame->uc.uc_mcontext)) |
1da177e4 LT |
249 | goto badframe; |
250 | ||
90268439 | 251 | if (compat_restore_altstack(&frame->uc.uc_stack)) |
1da177e4 LT |
252 | goto badframe; |
253 | ||
6a3713f0 | 254 | return regs->ax; |
1da177e4 LT |
255 | |
256 | badframe: | |
99b9cdf7 | 257 | signal_fault(regs, frame, "32bit rt sigreturn"); |
1da177e4 | 258 | return 0; |
99b9cdf7 | 259 | } |
1da177e4 LT |
260 | |
261 | /* | |
262 | * Set up a signal frame. | |
263 | */ | |
264 | ||
99b9cdf7 | 265 | static int ia32_setup_sigcontext(struct sigcontext_ia32 __user *sc, |
ab513701 | 266 | void __user *fpstate, |
99b9cdf7 | 267 | struct pt_regs *regs, unsigned int mask) |
1da177e4 | 268 | { |
a967bb3f | 269 | int err = 0; |
1da177e4 | 270 | |
3b4b7570 | 271 | put_user_try { |
a967bb3f HS |
272 | put_user_ex(get_user_seg(gs), (unsigned int __user *)&sc->gs); |
273 | put_user_ex(get_user_seg(fs), (unsigned int __user *)&sc->fs); | |
274 | put_user_ex(get_user_seg(ds), (unsigned int __user *)&sc->ds); | |
275 | put_user_ex(get_user_seg(es), (unsigned int __user *)&sc->es); | |
3b4b7570 HS |
276 | |
277 | put_user_ex(regs->di, &sc->di); | |
278 | put_user_ex(regs->si, &sc->si); | |
279 | put_user_ex(regs->bp, &sc->bp); | |
280 | put_user_ex(regs->sp, &sc->sp); | |
281 | put_user_ex(regs->bx, &sc->bx); | |
282 | put_user_ex(regs->dx, &sc->dx); | |
283 | put_user_ex(regs->cx, &sc->cx); | |
284 | put_user_ex(regs->ax, &sc->ax); | |
51e7dc70 | 285 | put_user_ex(current->thread.trap_nr, &sc->trapno); |
3b4b7570 HS |
286 | put_user_ex(current->thread.error_code, &sc->err); |
287 | put_user_ex(regs->ip, &sc->ip); | |
288 | put_user_ex(regs->cs, (unsigned int __user *)&sc->cs); | |
289 | put_user_ex(regs->flags, &sc->flags); | |
290 | put_user_ex(regs->sp, &sc->sp_at_signal); | |
291 | put_user_ex(regs->ss, (unsigned int __user *)&sc->ss); | |
292 | ||
293 | put_user_ex(ptr_to_compat(fpstate), &sc->fpstate); | |
294 | ||
295 | /* non-iBCS2 extensions.. */ | |
296 | put_user_ex(mask, &sc->oldmask); | |
297 | put_user_ex(current->thread.cr2, &sc->cr2); | |
298 | } put_user_catch(err); | |
1da177e4 LT |
299 | |
300 | return err; | |
301 | } | |
302 | ||
303 | /* | |
304 | * Determine which stack to use.. | |
305 | */ | |
235b8022 | 306 | static void __user *get_sigframe(struct ksignal *ksig, struct pt_regs *regs, |
3c1c7f10 | 307 | size_t frame_size, |
0ff8fef4 | 308 | void __user **fpstate) |
1da177e4 | 309 | { |
c5bedc68 | 310 | struct fpu *fpu = ¤t->thread.fpu; |
65ea5b03 | 311 | unsigned long sp; |
1da177e4 LT |
312 | |
313 | /* Default to using normal stack */ | |
65ea5b03 | 314 | sp = regs->sp; |
1da177e4 LT |
315 | |
316 | /* This is the X/Open sanctioned signal stack switching. */ | |
235b8022 AV |
317 | if (ksig->ka.sa.sa_flags & SA_ONSTACK) |
318 | sp = sigsp(sp, ksig); | |
1da177e4 | 319 | /* This is the legacy signal stack switching. */ |
8bee3f0a | 320 | else if ((regs->ss & 0xffff) != __USER32_DS && |
235b8022 AV |
321 | !(ksig->ka.sa.sa_flags & SA_RESTORER) && |
322 | ksig->ka.sa.sa_restorer) | |
323 | sp = (unsigned long) ksig->ka.sa.sa_restorer; | |
1da177e4 | 324 | |
c5bedc68 | 325 | if (fpu->fpstate_active) { |
72a671ce SS |
326 | unsigned long fx_aligned, math_size; |
327 | ||
328 | sp = alloc_mathframe(sp, 1, &fx_aligned, &math_size); | |
0ff8fef4 | 329 | *fpstate = (struct _fpstate_ia32 __user *) sp; |
72a671ce SS |
330 | if (save_xstate_sig(*fpstate, (void __user *)fx_aligned, |
331 | math_size) < 0) | |
99ea1b93 | 332 | return (void __user *) -1L; |
3c1c7f10 SS |
333 | } |
334 | ||
65ea5b03 | 335 | sp -= frame_size; |
d347f372 MO |
336 | /* Align the stack pointer according to the i386 ABI, |
337 | * i.e. so that on function entry ((sp + 4) & 15) == 0. */ | |
65ea5b03 PA |
338 | sp = ((sp + 4) & -16ul) - 4; |
339 | return (void __user *) sp; | |
1da177e4 LT |
340 | } |
341 | ||
235b8022 | 342 | int ia32_setup_frame(int sig, struct ksignal *ksig, |
99b9cdf7 | 343 | compat_sigset_t *set, struct pt_regs *regs) |
1da177e4 | 344 | { |
3b0d29ee | 345 | struct sigframe_ia32 __user *frame; |
99b9cdf7 | 346 | void __user *restorer; |
1da177e4 | 347 | int err = 0; |
ab513701 | 348 | void __user *fpstate = NULL; |
1da177e4 | 349 | |
99b9cdf7 TG |
350 | /* copy_to_user optimizes that into a single 8 byte store */ |
351 | static const struct { | |
352 | u16 poplmovl; | |
353 | u32 val; | |
354 | u16 int80; | |
99b9cdf7 TG |
355 | } __attribute__((packed)) code = { |
356 | 0xb858, /* popl %eax ; movl $...,%eax */ | |
357 | __NR_ia32_sigreturn, | |
358 | 0x80cd, /* int $0x80 */ | |
99b9cdf7 TG |
359 | }; |
360 | ||
235b8022 | 361 | frame = get_sigframe(ksig, regs, sizeof(*frame), &fpstate); |
1da177e4 LT |
362 | |
363 | if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) | |
3d0aedd9 | 364 | return -EFAULT; |
1da177e4 | 365 | |
2ba48e16 | 366 | if (__put_user(sig, &frame->sig)) |
3d0aedd9 | 367 | return -EFAULT; |
1da177e4 | 368 | |
2ba48e16 | 369 | if (ia32_setup_sigcontext(&frame->sc, fpstate, regs, set->sig[0])) |
3d0aedd9 | 370 | return -EFAULT; |
1da177e4 LT |
371 | |
372 | if (_COMPAT_NSIG_WORDS > 1) { | |
2ba48e16 HS |
373 | if (__copy_to_user(frame->extramask, &set->sig[1], |
374 | sizeof(frame->extramask))) | |
3d0aedd9 | 375 | return -EFAULT; |
1da177e4 | 376 | } |
1da177e4 | 377 | |
235b8022 AV |
378 | if (ksig->ka.sa.sa_flags & SA_RESTORER) { |
379 | restorer = ksig->ka.sa.sa_restorer; | |
af65d648 RM |
380 | } else { |
381 | /* Return stub is in 32bit vsyscall page */ | |
1a3e4ca4 | 382 | if (current->mm->context.vdso) |
6f121e54 AL |
383 | restorer = current->mm->context.vdso + |
384 | selected_vdso32->sym___kernel_sigreturn; | |
af65d648 | 385 | else |
ade1af77 | 386 | restorer = &frame->retcode; |
af65d648 | 387 | } |
99b9cdf7 | 388 | |
3b4b7570 HS |
389 | put_user_try { |
390 | put_user_ex(ptr_to_compat(restorer), &frame->pretcode); | |
391 | ||
392 | /* | |
393 | * These are actually not used anymore, but left because some | |
394 | * gdb versions depend on them as a marker. | |
395 | */ | |
0ff8fef4 | 396 | put_user_ex(*((u64 *)&code), (u64 __user *)frame->retcode); |
3b4b7570 HS |
397 | } put_user_catch(err); |
398 | ||
1da177e4 | 399 | if (err) |
3d0aedd9 | 400 | return -EFAULT; |
1da177e4 LT |
401 | |
402 | /* Set up registers for signal handler */ | |
65ea5b03 | 403 | regs->sp = (unsigned long) frame; |
235b8022 | 404 | regs->ip = (unsigned long) ksig->ka.sa.sa_handler; |
1da177e4 | 405 | |
536e3ee4 | 406 | /* Make -mregparm=3 work */ |
65ea5b03 PA |
407 | regs->ax = sig; |
408 | regs->dx = 0; | |
409 | regs->cx = 0; | |
536e3ee4 | 410 | |
b6edbb1e JF |
411 | loadsegment(ds, __USER32_DS); |
412 | loadsegment(es, __USER32_DS); | |
1da177e4 | 413 | |
99b9cdf7 TG |
414 | regs->cs = __USER32_CS; |
415 | regs->ss = __USER32_DS; | |
1da177e4 | 416 | |
1d001df1 | 417 | return 0; |
1da177e4 LT |
418 | } |
419 | ||
235b8022 | 420 | int ia32_setup_rt_frame(int sig, struct ksignal *ksig, |
99b9cdf7 | 421 | compat_sigset_t *set, struct pt_regs *regs) |
1da177e4 | 422 | { |
3b0d29ee | 423 | struct rt_sigframe_ia32 __user *frame; |
af65d648 | 424 | void __user *restorer; |
1da177e4 | 425 | int err = 0; |
ab513701 | 426 | void __user *fpstate = NULL; |
1da177e4 | 427 | |
99b9cdf7 TG |
428 | /* __copy_to_user optimizes that into a single 8 byte store */ |
429 | static const struct { | |
430 | u8 movl; | |
431 | u32 val; | |
432 | u16 int80; | |
9cc3c49e | 433 | u8 pad; |
99b9cdf7 TG |
434 | } __attribute__((packed)) code = { |
435 | 0xb8, | |
436 | __NR_ia32_rt_sigreturn, | |
437 | 0x80cd, | |
438 | 0, | |
439 | }; | |
440 | ||
235b8022 | 441 | frame = get_sigframe(ksig, regs, sizeof(*frame), &fpstate); |
1da177e4 LT |
442 | |
443 | if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) | |
3d0aedd9 | 444 | return -EFAULT; |
1da177e4 | 445 | |
3b4b7570 HS |
446 | put_user_try { |
447 | put_user_ex(sig, &frame->sig); | |
448 | put_user_ex(ptr_to_compat(&frame->info), &frame->pinfo); | |
449 | put_user_ex(ptr_to_compat(&frame->uc), &frame->puc); | |
1da177e4 | 450 | |
3b4b7570 HS |
451 | /* Create the ucontext. */ |
452 | if (cpu_has_xsave) | |
453 | put_user_ex(UC_FP_XSTATE, &frame->uc.uc_flags); | |
454 | else | |
455 | put_user_ex(0, &frame->uc.uc_flags); | |
456 | put_user_ex(0, &frame->uc.uc_link); | |
bd1c149a | 457 | compat_save_altstack_ex(&frame->uc.uc_stack, regs->sp); |
3b4b7570 | 458 | |
235b8022 AV |
459 | if (ksig->ka.sa.sa_flags & SA_RESTORER) |
460 | restorer = ksig->ka.sa.sa_restorer; | |
3b4b7570 | 461 | else |
6f121e54 AL |
462 | restorer = current->mm->context.vdso + |
463 | selected_vdso32->sym___kernel_rt_sigreturn; | |
3b4b7570 HS |
464 | put_user_ex(ptr_to_compat(restorer), &frame->pretcode); |
465 | ||
466 | /* | |
467 | * Not actually used anymore, but left because some gdb | |
468 | * versions need it. | |
469 | */ | |
0ff8fef4 | 470 | put_user_ex(*((u64 *)&code), (u64 __user *)frame->retcode); |
3b4b7570 | 471 | } put_user_catch(err); |
1da177e4 | 472 | |
235b8022 | 473 | err |= copy_siginfo_to_user32(&frame->info, &ksig->info); |
5e88353d PA |
474 | err |= ia32_setup_sigcontext(&frame->uc.uc_mcontext, fpstate, |
475 | regs, set->sig[0]); | |
476 | err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); | |
477 | ||
1da177e4 | 478 | if (err) |
3d0aedd9 | 479 | return -EFAULT; |
1da177e4 LT |
480 | |
481 | /* Set up registers for signal handler */ | |
65ea5b03 | 482 | regs->sp = (unsigned long) frame; |
235b8022 | 483 | regs->ip = (unsigned long) ksig->ka.sa.sa_handler; |
1da177e4 | 484 | |
a7aacdf9 | 485 | /* Make -mregparm=3 work */ |
65ea5b03 PA |
486 | regs->ax = sig; |
487 | regs->dx = (unsigned long) &frame->info; | |
488 | regs->cx = (unsigned long) &frame->uc; | |
a7aacdf9 | 489 | |
b6edbb1e JF |
490 | loadsegment(ds, __USER32_DS); |
491 | loadsegment(es, __USER32_DS); | |
99b9cdf7 TG |
492 | |
493 | regs->cs = __USER32_CS; | |
494 | regs->ss = __USER32_DS; | |
1da177e4 | 495 | |
1d001df1 | 496 | return 0; |
1da177e4 | 497 | } |