Commit | Line | Data |
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3dd681d9 WD |
1 | /* |
2 | * Based on arch/arm/kernel/signal.c | |
3 | * | |
4 | * Copyright (C) 1995-2009 Russell King | |
5 | * Copyright (C) 2012 ARM Ltd. | |
6 | * Modified by Will Deacon <will.deacon@arm.com> | |
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 version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
20 | ||
3dd681d9 WD |
21 | #include <linux/compat.h> |
22 | #include <linux/signal.h> | |
23 | #include <linux/syscalls.h> | |
24 | #include <linux/ratelimit.h> | |
25 | ||
9141300a | 26 | #include <asm/esr.h> |
3dd681d9 WD |
27 | #include <asm/fpsimd.h> |
28 | #include <asm/signal32.h> | |
29 | #include <asm/uaccess.h> | |
f3e5c847 | 30 | #include <asm/unistd.h> |
3dd681d9 | 31 | |
3dd681d9 WD |
32 | struct compat_sigcontext { |
33 | /* We always set these two fields to 0 */ | |
34 | compat_ulong_t trap_no; | |
35 | compat_ulong_t error_code; | |
36 | ||
37 | compat_ulong_t oldmask; | |
38 | compat_ulong_t arm_r0; | |
39 | compat_ulong_t arm_r1; | |
40 | compat_ulong_t arm_r2; | |
41 | compat_ulong_t arm_r3; | |
42 | compat_ulong_t arm_r4; | |
43 | compat_ulong_t arm_r5; | |
44 | compat_ulong_t arm_r6; | |
45 | compat_ulong_t arm_r7; | |
46 | compat_ulong_t arm_r8; | |
47 | compat_ulong_t arm_r9; | |
48 | compat_ulong_t arm_r10; | |
49 | compat_ulong_t arm_fp; | |
50 | compat_ulong_t arm_ip; | |
51 | compat_ulong_t arm_sp; | |
52 | compat_ulong_t arm_lr; | |
53 | compat_ulong_t arm_pc; | |
54 | compat_ulong_t arm_cpsr; | |
55 | compat_ulong_t fault_address; | |
56 | }; | |
57 | ||
58 | struct compat_ucontext { | |
59 | compat_ulong_t uc_flags; | |
c0e01d5d | 60 | compat_uptr_t uc_link; |
3dd681d9 WD |
61 | compat_stack_t uc_stack; |
62 | struct compat_sigcontext uc_mcontext; | |
63 | compat_sigset_t uc_sigmask; | |
64 | int __unused[32 - (sizeof (compat_sigset_t) / sizeof (int))]; | |
65 | compat_ulong_t uc_regspace[128] __attribute__((__aligned__(8))); | |
66 | }; | |
67 | ||
68 | struct compat_vfp_sigframe { | |
69 | compat_ulong_t magic; | |
70 | compat_ulong_t size; | |
71 | struct compat_user_vfp { | |
72 | compat_u64 fpregs[32]; | |
73 | compat_ulong_t fpscr; | |
74 | } ufp; | |
75 | struct compat_user_vfp_exc { | |
76 | compat_ulong_t fpexc; | |
77 | compat_ulong_t fpinst; | |
78 | compat_ulong_t fpinst2; | |
79 | } ufp_exc; | |
80 | } __attribute__((__aligned__(8))); | |
81 | ||
82 | #define VFP_MAGIC 0x56465001 | |
83 | #define VFP_STORAGE_SIZE sizeof(struct compat_vfp_sigframe) | |
84 | ||
9141300a CM |
85 | #define FSR_WRITE_SHIFT (11) |
86 | ||
3dd681d9 WD |
87 | struct compat_aux_sigframe { |
88 | struct compat_vfp_sigframe vfp; | |
89 | ||
90 | /* Something that isn't a valid magic number for any coprocessor. */ | |
91 | unsigned long end_magic; | |
92 | } __attribute__((__aligned__(8))); | |
93 | ||
94 | struct compat_sigframe { | |
95 | struct compat_ucontext uc; | |
96 | compat_ulong_t retcode[2]; | |
97 | }; | |
98 | ||
99 | struct compat_rt_sigframe { | |
100 | struct compat_siginfo info; | |
101 | struct compat_sigframe sig; | |
102 | }; | |
103 | ||
104 | #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) | |
105 | ||
3dd681d9 WD |
106 | static inline int put_sigset_t(compat_sigset_t __user *uset, sigset_t *set) |
107 | { | |
108 | compat_sigset_t cset; | |
109 | ||
110 | cset.sig[0] = set->sig[0] & 0xffffffffull; | |
111 | cset.sig[1] = set->sig[0] >> 32; | |
112 | ||
113 | return copy_to_user(uset, &cset, sizeof(*uset)); | |
114 | } | |
115 | ||
116 | static inline int get_sigset_t(sigset_t *set, | |
117 | const compat_sigset_t __user *uset) | |
118 | { | |
119 | compat_sigset_t s32; | |
120 | ||
121 | if (copy_from_user(&s32, uset, sizeof(*uset))) | |
122 | return -EFAULT; | |
123 | ||
124 | set->sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32); | |
125 | return 0; | |
126 | } | |
127 | ||
ce395960 | 128 | int copy_siginfo_to_user32(compat_siginfo_t __user *to, const siginfo_t *from) |
3dd681d9 WD |
129 | { |
130 | int err; | |
131 | ||
132 | if (!access_ok(VERIFY_WRITE, to, sizeof(*to))) | |
133 | return -EFAULT; | |
134 | ||
135 | /* If you change siginfo_t structure, please be sure | |
136 | * this code is fixed accordingly. | |
137 | * It should never copy any pad contained in the structure | |
138 | * to avoid security leaks, but must copy the generic | |
139 | * 3 ints plus the relevant union member. | |
140 | * This routine must convert siginfo from 64bit to 32bit as well | |
141 | * at the same time. | |
142 | */ | |
143 | err = __put_user(from->si_signo, &to->si_signo); | |
144 | err |= __put_user(from->si_errno, &to->si_errno); | |
145 | err |= __put_user((short)from->si_code, &to->si_code); | |
146 | if (from->si_code < 0) | |
147 | err |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad, | |
148 | SI_PAD_SIZE); | |
149 | else switch (from->si_code & __SI_MASK) { | |
150 | case __SI_KILL: | |
151 | err |= __put_user(from->si_pid, &to->si_pid); | |
152 | err |= __put_user(from->si_uid, &to->si_uid); | |
153 | break; | |
154 | case __SI_TIMER: | |
155 | err |= __put_user(from->si_tid, &to->si_tid); | |
156 | err |= __put_user(from->si_overrun, &to->si_overrun); | |
9d42d48a | 157 | err |= __put_user(from->si_int, &to->si_int); |
3dd681d9 WD |
158 | break; |
159 | case __SI_POLL: | |
160 | err |= __put_user(from->si_band, &to->si_band); | |
161 | err |= __put_user(from->si_fd, &to->si_fd); | |
162 | break; | |
163 | case __SI_FAULT: | |
164 | err |= __put_user((compat_uptr_t)(unsigned long)from->si_addr, | |
165 | &to->si_addr); | |
166 | #ifdef BUS_MCEERR_AO | |
167 | /* | |
168 | * Other callers might not initialize the si_lsb field, | |
ef769e32 | 169 | * so check explicitly for the right codes here. |
3dd681d9 | 170 | */ |
26135022 AA |
171 | if (from->si_signo == SIGBUS && |
172 | (from->si_code == BUS_MCEERR_AR || from->si_code == BUS_MCEERR_AO)) | |
3dd681d9 WD |
173 | err |= __put_user(from->si_addr_lsb, &to->si_addr_lsb); |
174 | #endif | |
175 | break; | |
176 | case __SI_CHLD: | |
177 | err |= __put_user(from->si_pid, &to->si_pid); | |
178 | err |= __put_user(from->si_uid, &to->si_uid); | |
179 | err |= __put_user(from->si_status, &to->si_status); | |
180 | err |= __put_user(from->si_utime, &to->si_utime); | |
181 | err |= __put_user(from->si_stime, &to->si_stime); | |
182 | break; | |
183 | case __SI_RT: /* This is not generated by the kernel as of now. */ | |
184 | case __SI_MESGQ: /* But this is */ | |
185 | err |= __put_user(from->si_pid, &to->si_pid); | |
186 | err |= __put_user(from->si_uid, &to->si_uid); | |
9d42d48a | 187 | err |= __put_user(from->si_int, &to->si_int); |
3dd681d9 | 188 | break; |
cc5e9097 AT |
189 | case __SI_SYS: |
190 | err |= __put_user((compat_uptr_t)(unsigned long) | |
191 | from->si_call_addr, &to->si_call_addr); | |
192 | err |= __put_user(from->si_syscall, &to->si_syscall); | |
193 | err |= __put_user(from->si_arch, &to->si_arch); | |
194 | break; | |
3dd681d9 WD |
195 | default: /* this is just in case for now ... */ |
196 | err |= __put_user(from->si_pid, &to->si_pid); | |
197 | err |= __put_user(from->si_uid, &to->si_uid); | |
198 | break; | |
199 | } | |
200 | return err; | |
201 | } | |
202 | ||
203 | int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from) | |
204 | { | |
3dd681d9 WD |
205 | if (copy_from_user(to, from, __ARCH_SI_PREAMBLE_SIZE) || |
206 | copy_from_user(to->_sifields._pad, | |
207 | from->_sifields._pad, SI_PAD_SIZE)) | |
208 | return -EFAULT; | |
209 | ||
210 | return 0; | |
211 | } | |
212 | ||
213 | /* | |
214 | * VFP save/restore code. | |
bdec97a8 WD |
215 | * |
216 | * We have to be careful with endianness, since the fpsimd context-switch | |
217 | * code operates on 128-bit (Q) register values whereas the compat ABI | |
218 | * uses an array of 64-bit (D) registers. Consequently, we need to swap | |
219 | * the two halves of each Q register when running on a big-endian CPU. | |
3dd681d9 | 220 | */ |
bdec97a8 WD |
221 | union __fpsimd_vreg { |
222 | __uint128_t raw; | |
223 | struct { | |
224 | #ifdef __AARCH64EB__ | |
225 | u64 hi; | |
226 | u64 lo; | |
227 | #else | |
228 | u64 lo; | |
229 | u64 hi; | |
230 | #endif | |
231 | }; | |
232 | }; | |
233 | ||
3dd681d9 WD |
234 | static int compat_preserve_vfp_context(struct compat_vfp_sigframe __user *frame) |
235 | { | |
236 | struct fpsimd_state *fpsimd = ¤t->thread.fpsimd_state; | |
237 | compat_ulong_t magic = VFP_MAGIC; | |
238 | compat_ulong_t size = VFP_STORAGE_SIZE; | |
239 | compat_ulong_t fpscr, fpexc; | |
bdec97a8 | 240 | int i, err = 0; |
3dd681d9 WD |
241 | |
242 | /* | |
243 | * Save the hardware registers to the fpsimd_state structure. | |
244 | * Note that this also saves V16-31, which aren't visible | |
245 | * in AArch32. | |
246 | */ | |
c51f9269 | 247 | fpsimd_preserve_current_state(); |
3dd681d9 WD |
248 | |
249 | /* Place structure header on the stack */ | |
250 | __put_user_error(magic, &frame->magic, err); | |
251 | __put_user_error(size, &frame->size, err); | |
252 | ||
253 | /* | |
254 | * Now copy the FP registers. Since the registers are packed, | |
255 | * we can copy the prefix we want (V0-V15) as it is. | |
3dd681d9 | 256 | */ |
bdec97a8 WD |
257 | for (i = 0; i < ARRAY_SIZE(frame->ufp.fpregs); i += 2) { |
258 | union __fpsimd_vreg vreg = { | |
259 | .raw = fpsimd->vregs[i >> 1], | |
260 | }; | |
261 | ||
262 | __put_user_error(vreg.lo, &frame->ufp.fpregs[i], err); | |
263 | __put_user_error(vreg.hi, &frame->ufp.fpregs[i + 1], err); | |
264 | } | |
3dd681d9 WD |
265 | |
266 | /* Create an AArch32 fpscr from the fpsr and the fpcr. */ | |
267 | fpscr = (fpsimd->fpsr & VFP_FPSCR_STAT_MASK) | | |
268 | (fpsimd->fpcr & VFP_FPSCR_CTRL_MASK); | |
269 | __put_user_error(fpscr, &frame->ufp.fpscr, err); | |
270 | ||
271 | /* | |
272 | * The exception register aren't available so we fake up a | |
273 | * basic FPEXC and zero everything else. | |
274 | */ | |
275 | fpexc = (1 << 30); | |
276 | __put_user_error(fpexc, &frame->ufp_exc.fpexc, err); | |
277 | __put_user_error(0, &frame->ufp_exc.fpinst, err); | |
278 | __put_user_error(0, &frame->ufp_exc.fpinst2, err); | |
279 | ||
280 | return err ? -EFAULT : 0; | |
281 | } | |
282 | ||
283 | static int compat_restore_vfp_context(struct compat_vfp_sigframe __user *frame) | |
284 | { | |
285 | struct fpsimd_state fpsimd; | |
286 | compat_ulong_t magic = VFP_MAGIC; | |
287 | compat_ulong_t size = VFP_STORAGE_SIZE; | |
288 | compat_ulong_t fpscr; | |
bdec97a8 | 289 | int i, err = 0; |
3dd681d9 WD |
290 | |
291 | __get_user_error(magic, &frame->magic, err); | |
292 | __get_user_error(size, &frame->size, err); | |
293 | ||
294 | if (err) | |
295 | return -EFAULT; | |
296 | if (magic != VFP_MAGIC || size != VFP_STORAGE_SIZE) | |
297 | return -EINVAL; | |
298 | ||
bdec97a8 WD |
299 | /* Copy the FP registers into the start of the fpsimd_state. */ |
300 | for (i = 0; i < ARRAY_SIZE(frame->ufp.fpregs); i += 2) { | |
301 | union __fpsimd_vreg vreg; | |
302 | ||
303 | __get_user_error(vreg.lo, &frame->ufp.fpregs[i], err); | |
304 | __get_user_error(vreg.hi, &frame->ufp.fpregs[i + 1], err); | |
305 | fpsimd.vregs[i >> 1] = vreg.raw; | |
306 | } | |
3dd681d9 WD |
307 | |
308 | /* Extract the fpsr and the fpcr from the fpscr */ | |
309 | __get_user_error(fpscr, &frame->ufp.fpscr, err); | |
310 | fpsimd.fpsr = fpscr & VFP_FPSCR_STAT_MASK; | |
311 | fpsimd.fpcr = fpscr & VFP_FPSCR_CTRL_MASK; | |
312 | ||
313 | /* | |
314 | * We don't need to touch the exception register, so | |
315 | * reload the hardware state. | |
316 | */ | |
c51f9269 AB |
317 | if (!err) |
318 | fpsimd_update_current_state(&fpsimd); | |
3dd681d9 WD |
319 | |
320 | return err ? -EFAULT : 0; | |
321 | } | |
322 | ||
3dd681d9 WD |
323 | static int compat_restore_sigframe(struct pt_regs *regs, |
324 | struct compat_sigframe __user *sf) | |
325 | { | |
326 | int err; | |
327 | sigset_t set; | |
328 | struct compat_aux_sigframe __user *aux; | |
329 | ||
330 | err = get_sigset_t(&set, &sf->uc.uc_sigmask); | |
331 | if (err == 0) { | |
332 | sigdelsetmask(&set, ~_BLOCKABLE); | |
333 | set_current_blocked(&set); | |
334 | } | |
335 | ||
336 | __get_user_error(regs->regs[0], &sf->uc.uc_mcontext.arm_r0, err); | |
337 | __get_user_error(regs->regs[1], &sf->uc.uc_mcontext.arm_r1, err); | |
338 | __get_user_error(regs->regs[2], &sf->uc.uc_mcontext.arm_r2, err); | |
339 | __get_user_error(regs->regs[3], &sf->uc.uc_mcontext.arm_r3, err); | |
340 | __get_user_error(regs->regs[4], &sf->uc.uc_mcontext.arm_r4, err); | |
341 | __get_user_error(regs->regs[5], &sf->uc.uc_mcontext.arm_r5, err); | |
342 | __get_user_error(regs->regs[6], &sf->uc.uc_mcontext.arm_r6, err); | |
343 | __get_user_error(regs->regs[7], &sf->uc.uc_mcontext.arm_r7, err); | |
344 | __get_user_error(regs->regs[8], &sf->uc.uc_mcontext.arm_r8, err); | |
345 | __get_user_error(regs->regs[9], &sf->uc.uc_mcontext.arm_r9, err); | |
346 | __get_user_error(regs->regs[10], &sf->uc.uc_mcontext.arm_r10, err); | |
347 | __get_user_error(regs->regs[11], &sf->uc.uc_mcontext.arm_fp, err); | |
348 | __get_user_error(regs->regs[12], &sf->uc.uc_mcontext.arm_ip, err); | |
349 | __get_user_error(regs->compat_sp, &sf->uc.uc_mcontext.arm_sp, err); | |
350 | __get_user_error(regs->compat_lr, &sf->uc.uc_mcontext.arm_lr, err); | |
351 | __get_user_error(regs->pc, &sf->uc.uc_mcontext.arm_pc, err); | |
352 | __get_user_error(regs->pstate, &sf->uc.uc_mcontext.arm_cpsr, err); | |
353 | ||
354 | /* | |
355 | * Avoid compat_sys_sigreturn() restarting. | |
356 | */ | |
357 | regs->syscallno = ~0UL; | |
358 | ||
dbd4d7ca | 359 | err |= !valid_user_regs(®s->user_regs, current); |
3dd681d9 WD |
360 | |
361 | aux = (struct compat_aux_sigframe __user *) sf->uc.uc_regspace; | |
362 | if (err == 0) | |
363 | err |= compat_restore_vfp_context(&aux->vfp); | |
364 | ||
365 | return err; | |
366 | } | |
367 | ||
368 | asmlinkage int compat_sys_sigreturn(struct pt_regs *regs) | |
369 | { | |
370 | struct compat_sigframe __user *frame; | |
371 | ||
372 | /* Always make any pending restarted system calls return -EINTR */ | |
f56141e3 | 373 | current->restart_block.fn = do_no_restart_syscall; |
3dd681d9 WD |
374 | |
375 | /* | |
376 | * Since we stacked the signal on a 64-bit boundary, | |
377 | * then 'sp' should be word aligned here. If it's | |
378 | * not, then the user is trying to mess with us. | |
379 | */ | |
380 | if (regs->compat_sp & 7) | |
381 | goto badframe; | |
382 | ||
383 | frame = (struct compat_sigframe __user *)regs->compat_sp; | |
384 | ||
385 | if (!access_ok(VERIFY_READ, frame, sizeof (*frame))) | |
386 | goto badframe; | |
387 | ||
388 | if (compat_restore_sigframe(regs, frame)) | |
389 | goto badframe; | |
390 | ||
391 | return regs->regs[0]; | |
392 | ||
393 | badframe: | |
394 | if (show_unhandled_signals) | |
395 | pr_info_ratelimited("%s[%d]: bad frame in %s: pc=%08llx sp=%08llx\n", | |
396 | current->comm, task_pid_nr(current), __func__, | |
4e2ee96a | 397 | regs->pc, regs->compat_sp); |
3dd681d9 WD |
398 | force_sig(SIGSEGV, current); |
399 | return 0; | |
400 | } | |
401 | ||
402 | asmlinkage int compat_sys_rt_sigreturn(struct pt_regs *regs) | |
403 | { | |
404 | struct compat_rt_sigframe __user *frame; | |
405 | ||
406 | /* Always make any pending restarted system calls return -EINTR */ | |
f56141e3 | 407 | current->restart_block.fn = do_no_restart_syscall; |
3dd681d9 WD |
408 | |
409 | /* | |
410 | * Since we stacked the signal on a 64-bit boundary, | |
411 | * then 'sp' should be word aligned here. If it's | |
412 | * not, then the user is trying to mess with us. | |
413 | */ | |
414 | if (regs->compat_sp & 7) | |
415 | goto badframe; | |
416 | ||
417 | frame = (struct compat_rt_sigframe __user *)regs->compat_sp; | |
418 | ||
419 | if (!access_ok(VERIFY_READ, frame, sizeof (*frame))) | |
420 | goto badframe; | |
421 | ||
422 | if (compat_restore_sigframe(regs, &frame->sig)) | |
423 | goto badframe; | |
424 | ||
207bdae4 | 425 | if (compat_restore_altstack(&frame->sig.uc.uc_stack)) |
3dd681d9 WD |
426 | goto badframe; |
427 | ||
428 | return regs->regs[0]; | |
429 | ||
430 | badframe: | |
431 | if (show_unhandled_signals) | |
432 | pr_info_ratelimited("%s[%d]: bad frame in %s: pc=%08llx sp=%08llx\n", | |
433 | current->comm, task_pid_nr(current), __func__, | |
4e2ee96a | 434 | regs->pc, regs->compat_sp); |
3dd681d9 WD |
435 | force_sig(SIGSEGV, current); |
436 | return 0; | |
437 | } | |
438 | ||
38a7be3c | 439 | static void __user *compat_get_sigframe(struct ksignal *ksig, |
88a24cff WD |
440 | struct pt_regs *regs, |
441 | int framesize) | |
3dd681d9 | 442 | { |
38a7be3c | 443 | compat_ulong_t sp = sigsp(regs->compat_sp, ksig); |
3dd681d9 WD |
444 | void __user *frame; |
445 | ||
3dd681d9 WD |
446 | /* |
447 | * ATPCS B01 mandates 8-byte alignment | |
448 | */ | |
449 | frame = compat_ptr((compat_uptr_t)((sp - framesize) & ~7)); | |
450 | ||
451 | /* | |
452 | * Check that we can actually write to the signal frame. | |
453 | */ | |
454 | if (!access_ok(VERIFY_WRITE, frame, framesize)) | |
455 | frame = NULL; | |
456 | ||
457 | return frame; | |
458 | } | |
459 | ||
060a18c7 WD |
460 | static void compat_setup_return(struct pt_regs *regs, struct k_sigaction *ka, |
461 | compat_ulong_t __user *rc, void __user *frame, | |
462 | int usig) | |
3dd681d9 WD |
463 | { |
464 | compat_ulong_t handler = ptr_to_compat(ka->sa.sa_handler); | |
465 | compat_ulong_t retcode; | |
2d888f48 | 466 | compat_ulong_t spsr = regs->pstate & ~(PSR_f | COMPAT_PSR_E_BIT); |
3dd681d9 WD |
467 | int thumb; |
468 | ||
469 | /* Check if the handler is written for ARM or Thumb */ | |
470 | thumb = handler & 1; | |
471 | ||
aa62c209 | 472 | if (thumb) |
3dd681d9 | 473 | spsr |= COMPAT_PSR_T_BIT; |
aa62c209 | 474 | else |
3dd681d9 | 475 | spsr &= ~COMPAT_PSR_T_BIT; |
aa62c209 P |
476 | |
477 | /* The IT state must be cleared for both ARM and Thumb-2 */ | |
478 | spsr &= ~COMPAT_PSR_IT_MASK; | |
3dd681d9 | 479 | |
2d888f48 SP |
480 | /* Restore the original endianness */ |
481 | spsr |= COMPAT_PSR_ENDSTATE; | |
482 | ||
3dd681d9 WD |
483 | if (ka->sa.sa_flags & SA_RESTORER) { |
484 | retcode = ptr_to_compat(ka->sa.sa_restorer); | |
485 | } else { | |
486 | /* Set up sigreturn pointer */ | |
487 | unsigned int idx = thumb << 1; | |
488 | ||
489 | if (ka->sa.sa_flags & SA_SIGINFO) | |
490 | idx += 3; | |
491 | ||
492 | retcode = AARCH32_VECTORS_BASE + | |
493 | AARCH32_KERN_SIGRET_CODE_OFFSET + | |
494 | (idx << 2) + thumb; | |
495 | } | |
496 | ||
497 | regs->regs[0] = usig; | |
498 | regs->compat_sp = ptr_to_compat(frame); | |
499 | regs->compat_lr = retcode; | |
500 | regs->pc = handler; | |
501 | regs->pstate = spsr; | |
3dd681d9 WD |
502 | } |
503 | ||
504 | static int compat_setup_sigframe(struct compat_sigframe __user *sf, | |
505 | struct pt_regs *regs, sigset_t *set) | |
506 | { | |
507 | struct compat_aux_sigframe __user *aux; | |
508 | int err = 0; | |
509 | ||
510 | __put_user_error(regs->regs[0], &sf->uc.uc_mcontext.arm_r0, err); | |
511 | __put_user_error(regs->regs[1], &sf->uc.uc_mcontext.arm_r1, err); | |
512 | __put_user_error(regs->regs[2], &sf->uc.uc_mcontext.arm_r2, err); | |
513 | __put_user_error(regs->regs[3], &sf->uc.uc_mcontext.arm_r3, err); | |
514 | __put_user_error(regs->regs[4], &sf->uc.uc_mcontext.arm_r4, err); | |
515 | __put_user_error(regs->regs[5], &sf->uc.uc_mcontext.arm_r5, err); | |
516 | __put_user_error(regs->regs[6], &sf->uc.uc_mcontext.arm_r6, err); | |
517 | __put_user_error(regs->regs[7], &sf->uc.uc_mcontext.arm_r7, err); | |
518 | __put_user_error(regs->regs[8], &sf->uc.uc_mcontext.arm_r8, err); | |
519 | __put_user_error(regs->regs[9], &sf->uc.uc_mcontext.arm_r9, err); | |
520 | __put_user_error(regs->regs[10], &sf->uc.uc_mcontext.arm_r10, err); | |
521 | __put_user_error(regs->regs[11], &sf->uc.uc_mcontext.arm_fp, err); | |
522 | __put_user_error(regs->regs[12], &sf->uc.uc_mcontext.arm_ip, err); | |
523 | __put_user_error(regs->compat_sp, &sf->uc.uc_mcontext.arm_sp, err); | |
524 | __put_user_error(regs->compat_lr, &sf->uc.uc_mcontext.arm_lr, err); | |
525 | __put_user_error(regs->pc, &sf->uc.uc_mcontext.arm_pc, err); | |
526 | __put_user_error(regs->pstate, &sf->uc.uc_mcontext.arm_cpsr, err); | |
527 | ||
528 | __put_user_error((compat_ulong_t)0, &sf->uc.uc_mcontext.trap_no, err); | |
9141300a | 529 | /* set the compat FSR WnR */ |
aed40e01 | 530 | __put_user_error(!!(current->thread.fault_code & ESR_ELx_WNR) << |
9141300a | 531 | FSR_WRITE_SHIFT, &sf->uc.uc_mcontext.error_code, err); |
3dd681d9 WD |
532 | __put_user_error(current->thread.fault_address, &sf->uc.uc_mcontext.fault_address, err); |
533 | __put_user_error(set->sig[0], &sf->uc.uc_mcontext.oldmask, err); | |
534 | ||
535 | err |= put_sigset_t(&sf->uc.uc_sigmask, set); | |
536 | ||
537 | aux = (struct compat_aux_sigframe __user *) sf->uc.uc_regspace; | |
538 | ||
539 | if (err == 0) | |
540 | err |= compat_preserve_vfp_context(&aux->vfp); | |
541 | __put_user_error(0, &aux->end_magic, err); | |
542 | ||
543 | return err; | |
544 | } | |
545 | ||
546 | /* | |
547 | * 32-bit signal handling routines called from signal.c | |
548 | */ | |
00554fa4 | 549 | int compat_setup_rt_frame(int usig, struct ksignal *ksig, |
3dd681d9 WD |
550 | sigset_t *set, struct pt_regs *regs) |
551 | { | |
552 | struct compat_rt_sigframe __user *frame; | |
3dd681d9 WD |
553 | int err = 0; |
554 | ||
38a7be3c | 555 | frame = compat_get_sigframe(ksig, regs, sizeof(*frame)); |
3dd681d9 WD |
556 | |
557 | if (!frame) | |
558 | return 1; | |
559 | ||
00554fa4 | 560 | err |= copy_siginfo_to_user32(&frame->info, &ksig->info); |
3dd681d9 WD |
561 | |
562 | __put_user_error(0, &frame->sig.uc.uc_flags, err); | |
c0e01d5d | 563 | __put_user_error(0, &frame->sig.uc.uc_link, err); |
3dd681d9 | 564 | |
207bdae4 | 565 | err |= __compat_save_altstack(&frame->sig.uc.uc_stack, regs->compat_sp); |
3dd681d9 WD |
566 | |
567 | err |= compat_setup_sigframe(&frame->sig, regs, set); | |
3dd681d9 WD |
568 | |
569 | if (err == 0) { | |
00554fa4 | 570 | compat_setup_return(regs, &ksig->ka, frame->sig.retcode, frame, usig); |
3dd681d9 WD |
571 | regs->regs[1] = (compat_ulong_t)(unsigned long)&frame->info; |
572 | regs->regs[2] = (compat_ulong_t)(unsigned long)&frame->sig.uc; | |
573 | } | |
574 | ||
575 | return err; | |
576 | } | |
577 | ||
00554fa4 | 578 | int compat_setup_frame(int usig, struct ksignal *ksig, sigset_t *set, |
3dd681d9 WD |
579 | struct pt_regs *regs) |
580 | { | |
581 | struct compat_sigframe __user *frame; | |
582 | int err = 0; | |
583 | ||
38a7be3c | 584 | frame = compat_get_sigframe(ksig, regs, sizeof(*frame)); |
3dd681d9 WD |
585 | |
586 | if (!frame) | |
587 | return 1; | |
588 | ||
589 | __put_user_error(0x5ac3c35a, &frame->uc.uc_flags, err); | |
590 | ||
591 | err |= compat_setup_sigframe(frame, regs, set); | |
592 | if (err == 0) | |
00554fa4 | 593 | compat_setup_return(regs, &ksig->ka, frame->retcode, frame, usig); |
3dd681d9 WD |
594 | |
595 | return err; | |
596 | } | |
597 | ||
3dd681d9 WD |
598 | void compat_setup_restart_syscall(struct pt_regs *regs) |
599 | { | |
4ed27ecf | 600 | regs->regs[7] = __NR_compat_restart_syscall; |
3dd681d9 | 601 | } |