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1da177e4 LT |
1 | /* Signal support for 32-bit kernel builds |
2 | * | |
3 | * Copyright (C) 2001 Matthew Wilcox <willy at parisc-linux.org> | |
4 | * Code was mostly borrowed from kernel/signal.c. | |
5 | * See kernel/signal.c for additional Copyrights. | |
6 | * | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | */ | |
22 | ||
23 | #include <linux/compat.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/module.h> | |
26 | #include <linux/unistd.h> | |
27 | #include <linux/smp_lock.h> | |
28 | #include <linux/init.h> | |
29 | #include <linux/sched.h> | |
30 | #include <linux/syscalls.h> | |
31 | #include <linux/types.h> | |
32 | #include <linux/errno.h> | |
33 | ||
1da177e4 LT |
34 | #include <asm/uaccess.h> |
35 | ||
36 | #include "signal32.h" | |
37 | #include "sys32.h" | |
38 | ||
39 | #define DEBUG_COMPAT_SIG 0 | |
40 | #define DEBUG_COMPAT_SIG_LEVEL 2 | |
41 | ||
42 | #if DEBUG_COMPAT_SIG | |
43 | #define DBG(LEVEL, ...) \ | |
44 | ((DEBUG_COMPAT_SIG_LEVEL >= LEVEL) \ | |
45 | ? printk(__VA_ARGS__) : (void) 0) | |
46 | #else | |
47 | #define DBG(LEVEL, ...) | |
48 | #endif | |
49 | ||
50 | #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) | |
51 | ||
52 | inline void | |
53 | sigset_32to64(sigset_t *s64, compat_sigset_t *s32) | |
54 | { | |
55 | s64->sig[0] = s32->sig[0] | ((unsigned long)s32->sig[1] << 32); | |
56 | } | |
57 | ||
58 | inline void | |
59 | sigset_64to32(compat_sigset_t *s32, sigset_t *s64) | |
60 | { | |
61 | s32->sig[0] = s64->sig[0] & 0xffffffffUL; | |
62 | s32->sig[1] = (s64->sig[0] >> 32) & 0xffffffffUL; | |
63 | } | |
64 | ||
65 | static int | |
66 | put_sigset32(compat_sigset_t __user *up, sigset_t *set, size_t sz) | |
67 | { | |
68 | compat_sigset_t s; | |
69 | ||
70 | if (sz != sizeof *set) panic("put_sigset32()"); | |
71 | sigset_64to32(&s, set); | |
72 | ||
73 | return copy_to_user(up, &s, sizeof s); | |
74 | } | |
75 | ||
76 | static int | |
77 | get_sigset32(compat_sigset_t __user *up, sigset_t *set, size_t sz) | |
78 | { | |
79 | compat_sigset_t s; | |
80 | int r; | |
81 | ||
82 | if (sz != sizeof *set) panic("put_sigset32()"); | |
83 | ||
84 | if ((r = copy_from_user(&s, up, sz)) == 0) { | |
85 | sigset_32to64(set, &s); | |
86 | } | |
87 | ||
88 | return r; | |
89 | } | |
90 | ||
91 | int sys32_rt_sigprocmask(int how, compat_sigset_t __user *set, compat_sigset_t __user *oset, | |
92 | unsigned int sigsetsize) | |
93 | { | |
94 | sigset_t old_set, new_set; | |
95 | int ret; | |
96 | ||
97 | if (set && get_sigset32(set, &new_set, sigsetsize)) | |
98 | return -EFAULT; | |
99 | ||
100 | KERNEL_SYSCALL(ret, sys_rt_sigprocmask, how, set ? (sigset_t __user *)&new_set : NULL, | |
101 | oset ? (sigset_t __user *)&old_set : NULL, sigsetsize); | |
102 | ||
103 | if (!ret && oset && put_sigset32(oset, &old_set, sigsetsize)) | |
104 | return -EFAULT; | |
105 | ||
106 | return ret; | |
107 | } | |
108 | ||
109 | ||
110 | int sys32_rt_sigpending(compat_sigset_t __user *uset, unsigned int sigsetsize) | |
111 | { | |
112 | int ret; | |
113 | sigset_t set; | |
114 | ||
115 | KERNEL_SYSCALL(ret, sys_rt_sigpending, (sigset_t __user *)&set, sigsetsize); | |
116 | ||
117 | if (!ret && put_sigset32(uset, &set, sigsetsize)) | |
118 | return -EFAULT; | |
119 | ||
120 | return ret; | |
121 | } | |
122 | ||
123 | long | |
124 | sys32_rt_sigaction(int sig, const struct sigaction32 __user *act, struct sigaction32 __user *oact, | |
125 | size_t sigsetsize) | |
126 | { | |
127 | struct k_sigaction32 new_sa32, old_sa32; | |
128 | struct k_sigaction new_sa, old_sa; | |
129 | int ret = -EINVAL; | |
130 | ||
131 | if (act) { | |
132 | if (copy_from_user(&new_sa32.sa, act, sizeof new_sa32.sa)) | |
133 | return -EFAULT; | |
134 | new_sa.sa.sa_handler = (__sighandler_t)(unsigned long)new_sa32.sa.sa_handler; | |
135 | new_sa.sa.sa_flags = new_sa32.sa.sa_flags; | |
136 | sigset_32to64(&new_sa.sa.sa_mask, &new_sa32.sa.sa_mask); | |
137 | } | |
138 | ||
139 | ret = do_sigaction(sig, act ? &new_sa : NULL, oact ? &old_sa : NULL); | |
140 | ||
141 | if (!ret && oact) { | |
142 | sigset_64to32(&old_sa32.sa.sa_mask, &old_sa.sa.sa_mask); | |
143 | old_sa32.sa.sa_flags = old_sa.sa.sa_flags; | |
144 | old_sa32.sa.sa_handler = (__sighandler_t32)(unsigned long)old_sa.sa.sa_handler; | |
145 | if (copy_to_user(oact, &old_sa32.sa, sizeof old_sa32.sa)) | |
146 | return -EFAULT; | |
147 | } | |
148 | return ret; | |
149 | } | |
150 | ||
151 | int | |
152 | do_sigaltstack32 (const compat_stack_t __user *uss32, compat_stack_t __user *uoss32, unsigned long sp) | |
153 | { | |
154 | compat_stack_t ss32, oss32; | |
155 | stack_t ss, oss; | |
156 | stack_t *ssp = NULL, *ossp = NULL; | |
157 | int ret; | |
158 | ||
159 | if (uss32) { | |
160 | if (copy_from_user(&ss32, uss32, sizeof ss32)) | |
161 | return -EFAULT; | |
162 | ||
163 | ss.ss_sp = (void __user *)(unsigned long)ss32.ss_sp; | |
164 | ss.ss_flags = ss32.ss_flags; | |
165 | ss.ss_size = ss32.ss_size; | |
166 | ||
167 | ssp = &ss; | |
168 | } | |
169 | ||
170 | if (uoss32) | |
171 | ossp = &oss; | |
172 | ||
173 | KERNEL_SYSCALL(ret, do_sigaltstack, (const stack_t __user *)ssp, (stack_t __user *)ossp, sp); | |
174 | ||
175 | if (!ret && uoss32) { | |
176 | oss32.ss_sp = (unsigned int)(unsigned long)oss.ss_sp; | |
177 | oss32.ss_flags = oss.ss_flags; | |
178 | oss32.ss_size = oss.ss_size; | |
179 | if (copy_to_user(uoss32, &oss32, sizeof *uoss32)) | |
180 | return -EFAULT; | |
181 | } | |
182 | ||
183 | return ret; | |
184 | } | |
185 | ||
186 | long | |
187 | restore_sigcontext32(struct compat_sigcontext __user *sc, struct compat_regfile __user * rf, | |
188 | struct pt_regs *regs) | |
189 | { | |
190 | long err = 0; | |
191 | compat_uint_t compat_reg; | |
192 | compat_uint_t compat_regt; | |
193 | int regn; | |
194 | ||
195 | /* When loading 32-bit values into 64-bit registers make | |
196 | sure to clear the upper 32-bits */ | |
197 | DBG(2,"restore_sigcontext32: PER_LINUX32 process\n"); | |
198 | DBG(2,"restore_sigcontext32: sc = 0x%p, rf = 0x%p, regs = 0x%p\n", sc, rf, regs); | |
199 | DBG(2,"restore_sigcontext32: compat_sigcontext is %#lx bytes\n", sizeof(*sc)); | |
200 | for(regn=0; regn < 32; regn++){ | |
201 | err |= __get_user(compat_reg,&sc->sc_gr[regn]); | |
202 | regs->gr[regn] = compat_reg; | |
203 | /* Load upper half */ | |
204 | err |= __get_user(compat_regt,&rf->rf_gr[regn]); | |
205 | regs->gr[regn] = ((u64)compat_regt << 32) | (u64)compat_reg; | |
206 | DBG(3,"restore_sigcontext32: gr%02d = %#lx (%#x / %#x)\n", | |
207 | regn, regs->gr[regn], compat_regt, compat_reg); | |
208 | } | |
209 | DBG(2,"restore_sigcontext32: sc->sc_fr = 0x%p (%#lx)\n",sc->sc_fr, sizeof(sc->sc_fr)); | |
210 | /* XXX: BE WARNED FR's are 64-BIT! */ | |
211 | err |= __copy_from_user(regs->fr, sc->sc_fr, sizeof(regs->fr)); | |
212 | ||
213 | /* Better safe than sorry, pass __get_user two things of | |
214 | the same size and let gcc do the upward conversion to | |
215 | 64-bits */ | |
216 | err |= __get_user(compat_reg, &sc->sc_iaoq[0]); | |
217 | /* Load upper half */ | |
218 | err |= __get_user(compat_regt, &rf->rf_iaoq[0]); | |
219 | regs->iaoq[0] = ((u64)compat_regt << 32) | (u64)compat_reg; | |
220 | DBG(2,"restore_sigcontext32: upper half of iaoq[0] = %#lx\n", compat_regt); | |
221 | DBG(2,"restore_sigcontext32: sc->sc_iaoq[0] = %p => %#x\n", | |
222 | &sc->sc_iaoq[0], compat_reg); | |
223 | ||
224 | err |= __get_user(compat_reg, &sc->sc_iaoq[1]); | |
225 | /* Load upper half */ | |
226 | err |= __get_user(compat_regt, &rf->rf_iaoq[1]); | |
227 | regs->iaoq[1] = ((u64)compat_regt << 32) | (u64)compat_reg; | |
228 | DBG(2,"restore_sigcontext32: upper half of iaoq[1] = %#lx\n", compat_regt); | |
229 | DBG(2,"restore_sigcontext32: sc->sc_iaoq[1] = %p => %#x\n", | |
230 | &sc->sc_iaoq[1],compat_reg); | |
231 | DBG(2,"restore_sigcontext32: iaoq is %#lx / %#lx\n", | |
232 | regs->iaoq[0],regs->iaoq[1]); | |
233 | ||
234 | err |= __get_user(compat_reg, &sc->sc_iasq[0]); | |
235 | /* Load the upper half for iasq */ | |
236 | err |= __get_user(compat_regt, &rf->rf_iasq[0]); | |
237 | regs->iasq[0] = ((u64)compat_regt << 32) | (u64)compat_reg; | |
238 | DBG(2,"restore_sigcontext32: upper half of iasq[0] = %#lx\n", compat_regt); | |
239 | ||
240 | err |= __get_user(compat_reg, &sc->sc_iasq[1]); | |
241 | /* Load the upper half for iasq */ | |
242 | err |= __get_user(compat_regt, &rf->rf_iasq[1]); | |
243 | regs->iasq[1] = ((u64)compat_regt << 32) | (u64)compat_reg; | |
244 | DBG(2,"restore_sigcontext32: upper half of iasq[1] = %#lx\n", compat_regt); | |
245 | DBG(2,"restore_sigcontext32: iasq is %#lx / %#lx\n", | |
246 | regs->iasq[0],regs->iasq[1]); | |
247 | ||
248 | err |= __get_user(compat_reg, &sc->sc_sar); | |
249 | /* Load the upper half for sar */ | |
250 | err |= __get_user(compat_regt, &rf->rf_sar); | |
251 | regs->sar = ((u64)compat_regt << 32) | (u64)compat_reg; | |
252 | DBG(2,"restore_sigcontext32: upper_half & sar = %#lx\n", compat_regt); | |
253 | DBG(2,"restore_sigcontext32: sar is %#lx\n", regs->sar); | |
254 | DBG(2,"restore_sigcontext32: r28 is %ld\n", regs->gr[28]); | |
255 | ||
256 | return err; | |
257 | } | |
258 | ||
259 | /* | |
260 | * Set up the sigcontext structure for this process. | |
261 | * This is not an easy task if the kernel is 64-bit, it will require | |
262 | * that we examine the process personality to determine if we need to | |
263 | * truncate for a 32-bit userspace. | |
264 | */ | |
265 | long | |
266 | setup_sigcontext32(struct compat_sigcontext __user *sc, struct compat_regfile __user * rf, | |
267 | struct pt_regs *regs, int in_syscall) | |
268 | { | |
269 | compat_int_t flags = 0; | |
270 | long err = 0; | |
271 | compat_uint_t compat_reg; | |
272 | compat_uint_t compat_regb; | |
273 | int regn; | |
274 | ||
275 | if (on_sig_stack((unsigned long) sc)) | |
276 | flags |= PARISC_SC_FLAG_ONSTACK; | |
277 | ||
278 | if (in_syscall) { | |
279 | ||
280 | DBG(1,"setup_sigcontext32: in_syscall\n"); | |
281 | ||
282 | flags |= PARISC_SC_FLAG_IN_SYSCALL; | |
283 | /* Truncate gr31 */ | |
284 | compat_reg = (compat_uint_t)(regs->gr[31]); | |
285 | /* regs->iaoq is undefined in the syscall return path */ | |
286 | err |= __put_user(compat_reg, &sc->sc_iaoq[0]); | |
287 | DBG(2,"setup_sigcontext32: sc->sc_iaoq[0] = %p <= %#x\n", | |
288 | &sc->sc_iaoq[0], compat_reg); | |
289 | ||
290 | /* Store upper half */ | |
291 | compat_reg = (compat_uint_t)(regs->gr[32] >> 32); | |
292 | err |= __put_user(compat_reg, &rf->rf_iaoq[0]); | |
293 | DBG(2,"setup_sigcontext32: upper half iaoq[0] = %#x\n", compat_reg); | |
294 | ||
295 | ||
296 | compat_reg = (compat_uint_t)(regs->gr[31]+4); | |
297 | err |= __put_user(compat_reg, &sc->sc_iaoq[1]); | |
298 | DBG(2,"setup_sigcontext32: sc->sc_iaoq[1] = %p <= %#x\n", | |
299 | &sc->sc_iaoq[1], compat_reg); | |
300 | /* Store upper half */ | |
301 | compat_reg = (compat_uint_t)((regs->gr[32]+4) >> 32); | |
302 | err |= __put_user(compat_reg, &rf->rf_iaoq[1]); | |
303 | DBG(2,"setup_sigcontext32: upper half iaoq[1] = %#x\n", compat_reg); | |
304 | ||
305 | /* Truncate sr3 */ | |
306 | compat_reg = (compat_uint_t)(regs->sr[3]); | |
307 | err |= __put_user(compat_reg, &sc->sc_iasq[0]); | |
308 | err |= __put_user(compat_reg, &sc->sc_iasq[1]); | |
309 | ||
310 | /* Store upper half */ | |
311 | compat_reg = (compat_uint_t)(regs->sr[3] >> 32); | |
312 | err |= __put_user(compat_reg, &rf->rf_iasq[0]); | |
313 | err |= __put_user(compat_reg, &rf->rf_iasq[1]); | |
314 | ||
315 | DBG(2,"setup_sigcontext32: upper half iasq[0] = %#x\n", compat_reg); | |
316 | DBG(2,"setup_sigcontext32: upper half iasq[1] = %#x\n", compat_reg); | |
317 | DBG(1,"setup_sigcontext32: iaoq %#lx / %#lx\n", | |
318 | regs->gr[31], regs->gr[31]+4); | |
319 | ||
320 | } else { | |
321 | ||
322 | compat_reg = (compat_uint_t)(regs->iaoq[0]); | |
323 | err |= __put_user(compat_reg, &sc->sc_iaoq[0]); | |
324 | DBG(2,"setup_sigcontext32: sc->sc_iaoq[0] = %p <= %#x\n", | |
325 | &sc->sc_iaoq[0], compat_reg); | |
326 | /* Store upper half */ | |
327 | compat_reg = (compat_uint_t)(regs->iaoq[0] >> 32); | |
328 | err |= __put_user(compat_reg, &rf->rf_iaoq[0]); | |
329 | DBG(2,"setup_sigcontext32: upper half iaoq[0] = %#x\n", compat_reg); | |
330 | ||
331 | compat_reg = (compat_uint_t)(regs->iaoq[1]); | |
332 | err |= __put_user(compat_reg, &sc->sc_iaoq[1]); | |
333 | DBG(2,"setup_sigcontext32: sc->sc_iaoq[1] = %p <= %#x\n", | |
334 | &sc->sc_iaoq[1], compat_reg); | |
335 | /* Store upper half */ | |
336 | compat_reg = (compat_uint_t)(regs->iaoq[1] >> 32); | |
337 | err |= __put_user(compat_reg, &rf->rf_iaoq[1]); | |
338 | DBG(2,"setup_sigcontext32: upper half iaoq[1] = %#x\n", compat_reg); | |
339 | ||
340 | ||
341 | compat_reg = (compat_uint_t)(regs->iasq[0]); | |
342 | err |= __put_user(compat_reg, &sc->sc_iasq[0]); | |
343 | DBG(2,"setup_sigcontext32: sc->sc_iasq[0] = %p <= %#x\n", | |
344 | &sc->sc_iasq[0], compat_reg); | |
345 | /* Store upper half */ | |
346 | compat_reg = (compat_uint_t)(regs->iasq[0] >> 32); | |
347 | err |= __put_user(compat_reg, &rf->rf_iasq[0]); | |
348 | DBG(2,"setup_sigcontext32: upper half iasq[0] = %#x\n", compat_reg); | |
349 | ||
350 | ||
351 | compat_reg = (compat_uint_t)(regs->iasq[1]); | |
352 | err |= __put_user(compat_reg, &sc->sc_iasq[1]); | |
353 | DBG(2,"setup_sigcontext32: sc->sc_iasq[1] = %p <= %#x\n", | |
354 | &sc->sc_iasq[1], compat_reg); | |
355 | /* Store upper half */ | |
356 | compat_reg = (compat_uint_t)(regs->iasq[1] >> 32); | |
357 | err |= __put_user(compat_reg, &rf->rf_iasq[1]); | |
358 | DBG(2,"setup_sigcontext32: upper half iasq[1] = %#x\n", compat_reg); | |
359 | ||
360 | /* Print out the IAOQ for debugging */ | |
361 | DBG(1,"setup_sigcontext32: ia0q %#lx / %#lx\n", | |
362 | regs->iaoq[0], regs->iaoq[1]); | |
363 | } | |
364 | ||
365 | err |= __put_user(flags, &sc->sc_flags); | |
366 | ||
367 | DBG(1,"setup_sigcontext32: Truncating general registers.\n"); | |
368 | ||
369 | for(regn=0; regn < 32; regn++){ | |
370 | /* Truncate a general register */ | |
371 | compat_reg = (compat_uint_t)(regs->gr[regn]); | |
372 | err |= __put_user(compat_reg, &sc->sc_gr[regn]); | |
373 | /* Store upper half */ | |
374 | compat_regb = (compat_uint_t)(regs->gr[regn] >> 32); | |
375 | err |= __put_user(compat_regb, &rf->rf_gr[regn]); | |
376 | ||
377 | /* DEBUG: Write out the "upper / lower" register data */ | |
378 | DBG(2,"setup_sigcontext32: gr%02d = %#x / %#x\n", regn, | |
379 | compat_regb, compat_reg); | |
380 | } | |
381 | ||
382 | /* Copy the floating point registers (same size) | |
383 | XXX: BE WARNED FR's are 64-BIT! */ | |
384 | DBG(1,"setup_sigcontext32: Copying from regs to sc, " | |
385 | "sc->sc_fr size = %#lx, regs->fr size = %#lx\n", | |
386 | sizeof(regs->fr), sizeof(sc->sc_fr)); | |
387 | err |= __copy_to_user(sc->sc_fr, regs->fr, sizeof(regs->fr)); | |
388 | ||
389 | compat_reg = (compat_uint_t)(regs->sar); | |
390 | err |= __put_user(compat_reg, &sc->sc_sar); | |
391 | DBG(2,"setup_sigcontext32: sar is %#x\n", compat_reg); | |
392 | /* Store upper half */ | |
393 | compat_reg = (compat_uint_t)(regs->sar >> 32); | |
394 | err |= __put_user(compat_reg, &rf->rf_sar); | |
395 | DBG(2,"setup_sigcontext32: upper half sar = %#x\n", compat_reg); | |
396 | DBG(1,"setup_sigcontext32: r28 is %ld\n", regs->gr[28]); | |
397 | ||
398 | return err; | |
399 | } | |
f671c45d KM |
400 | |
401 | int | |
402 | copy_siginfo_from_user32 (siginfo_t *to, compat_siginfo_t __user *from) | |
403 | { | |
404 | unsigned long tmp; | |
405 | int err; | |
406 | ||
407 | if (!access_ok(VERIFY_READ, from, sizeof(compat_siginfo_t))) | |
408 | return -EFAULT; | |
409 | ||
410 | err = __get_user(to->si_signo, &from->si_signo); | |
411 | err |= __get_user(to->si_errno, &from->si_errno); | |
412 | err |= __get_user(to->si_code, &from->si_code); | |
413 | ||
414 | if (to->si_code < 0) | |
415 | err |= __copy_from_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE); | |
416 | else { | |
417 | switch (to->si_code >> 16) { | |
418 | case __SI_CHLD >> 16: | |
419 | err |= __get_user(to->si_utime, &from->si_utime); | |
420 | err |= __get_user(to->si_stime, &from->si_stime); | |
421 | err |= __get_user(to->si_status, &from->si_status); | |
422 | default: | |
423 | err |= __get_user(to->si_pid, &from->si_pid); | |
424 | err |= __get_user(to->si_uid, &from->si_uid); | |
425 | break; | |
426 | case __SI_FAULT >> 16: | |
427 | err |= __get_user(tmp, &from->si_addr); | |
428 | to->si_addr = (void __user *) tmp; | |
429 | break; | |
430 | case __SI_POLL >> 16: | |
431 | err |= __get_user(to->si_band, &from->si_band); | |
432 | err |= __get_user(to->si_fd, &from->si_fd); | |
433 | break; | |
434 | case __SI_RT >> 16: /* This is not generated by the kernel as of now. */ | |
435 | case __SI_MESGQ >> 16: | |
436 | err |= __get_user(to->si_pid, &from->si_pid); | |
437 | err |= __get_user(to->si_uid, &from->si_uid); | |
438 | err |= __get_user(to->si_int, &from->si_int); | |
439 | break; | |
440 | } | |
441 | } | |
442 | return err; | |
443 | } | |
444 | ||
445 | int | |
446 | copy_siginfo_to_user32 (compat_siginfo_t __user *to, siginfo_t *from) | |
447 | { | |
448 | unsigned int addr; | |
449 | int err; | |
450 | ||
451 | if (!access_ok(VERIFY_WRITE, to, sizeof(compat_siginfo_t))) | |
452 | return -EFAULT; | |
453 | ||
454 | /* If you change siginfo_t structure, please be sure | |
455 | this code is fixed accordingly. | |
456 | It should never copy any pad contained in the structure | |
457 | to avoid security leaks, but must copy the generic | |
458 | 3 ints plus the relevant union member. | |
459 | This routine must convert siginfo from 64bit to 32bit as well | |
460 | at the same time. */ | |
461 | err = __put_user(from->si_signo, &to->si_signo); | |
462 | err |= __put_user(from->si_errno, &to->si_errno); | |
463 | err |= __put_user((short)from->si_code, &to->si_code); | |
464 | if (from->si_code < 0) | |
465 | err |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE); | |
466 | else { | |
467 | switch (from->si_code >> 16) { | |
468 | case __SI_CHLD >> 16: | |
469 | err |= __put_user(from->si_utime, &to->si_utime); | |
470 | err |= __put_user(from->si_stime, &to->si_stime); | |
471 | err |= __put_user(from->si_status, &to->si_status); | |
472 | default: | |
473 | err |= __put_user(from->si_pid, &to->si_pid); | |
474 | err |= __put_user(from->si_uid, &to->si_uid); | |
475 | break; | |
476 | case __SI_FAULT >> 16: | |
477 | /* avoid type-checking warnings by copying _pad[0] in lieu of si_addr... */ | |
478 | err |= __put_user(from->_sifields._pad[0], &to->si_addr); | |
479 | break; | |
480 | case __SI_POLL >> 16: | |
481 | err |= __put_user(from->si_band, &to->si_band); | |
482 | err |= __put_user(from->si_fd, &to->si_fd); | |
483 | break; | |
484 | case __SI_TIMER >> 16: | |
485 | err |= __put_user(from->si_tid, &to->si_tid); | |
486 | err |= __put_user(from->si_overrun, &to->si_overrun); | |
487 | addr = (unsigned long) from->si_ptr; | |
488 | err |= __put_user(addr, &to->si_ptr); | |
489 | break; | |
490 | case __SI_RT >> 16: /* Not generated by the kernel as of now. */ | |
491 | case __SI_MESGQ >> 16: | |
492 | err |= __put_user(from->si_uid, &to->si_uid); | |
493 | err |= __put_user(from->si_pid, &to->si_pid); | |
494 | addr = (unsigned long) from->si_ptr; | |
495 | err |= __put_user(addr, &to->si_ptr); | |
496 | break; | |
497 | } | |
498 | } | |
499 | return err; | |
500 | } |