Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
a53c8fab | 2 | * Copyright IBM Corp. 2000, 2006 |
1da177e4 LT |
3 | * Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) |
4 | * Gerhard Tonn (ton@de.ibm.com) | |
5 | * | |
6 | * Copyright (C) 1991, 1992 Linus Torvalds | |
7 | * | |
8 | * 1997-11-28 Modified for POSIX.1b signals by Richard Henderson | |
9 | */ | |
10 | ||
1da177e4 LT |
11 | #include <linux/compat.h> |
12 | #include <linux/sched.h> | |
13 | #include <linux/mm.h> | |
14 | #include <linux/smp.h> | |
1da177e4 LT |
15 | #include <linux/kernel.h> |
16 | #include <linux/signal.h> | |
17 | #include <linux/errno.h> | |
18 | #include <linux/wait.h> | |
19 | #include <linux/ptrace.h> | |
20 | #include <linux/unistd.h> | |
21 | #include <linux/stddef.h> | |
22 | #include <linux/tty.h> | |
23 | #include <linux/personality.h> | |
24 | #include <linux/binfmts.h> | |
25 | #include <asm/ucontext.h> | |
26 | #include <asm/uaccess.h> | |
27 | #include <asm/lowcore.h> | |
a0616cde | 28 | #include <asm/switch_to.h> |
1da177e4 LT |
29 | #include "compat_linux.h" |
30 | #include "compat_ptrace.h" | |
a806170e | 31 | #include "entry.h" |
1da177e4 | 32 | |
1da177e4 LT |
33 | typedef struct |
34 | { | |
35 | __u8 callee_used_stack[__SIGNAL_FRAMESIZE32]; | |
36 | struct sigcontext32 sc; | |
37 | _sigregs32 sregs; | |
38 | int signo; | |
ea2a4d3a | 39 | __u32 gprs_high[NUM_GPRS]; |
1da177e4 LT |
40 | __u8 retcode[S390_SYSCALL_SIZE]; |
41 | } sigframe32; | |
42 | ||
43 | typedef struct | |
44 | { | |
45 | __u8 callee_used_stack[__SIGNAL_FRAMESIZE32]; | |
46 | __u8 retcode[S390_SYSCALL_SIZE]; | |
47 | compat_siginfo_t info; | |
48 | struct ucontext32 uc; | |
ea2a4d3a | 49 | __u32 gprs_high[NUM_GPRS]; |
1da177e4 LT |
50 | } rt_sigframe32; |
51 | ||
ce395960 | 52 | int copy_siginfo_to_user32(compat_siginfo_t __user *to, const siginfo_t *from) |
1da177e4 LT |
53 | { |
54 | int err; | |
55 | ||
1da177e4 LT |
56 | /* If you change siginfo_t structure, please be sure |
57 | this code is fixed accordingly. | |
58 | It should never copy any pad contained in the structure | |
59 | to avoid security leaks, but must copy the generic | |
60 | 3 ints plus the relevant union member. | |
61 | This routine must convert siginfo from 64bit to 32bit as well | |
62 | at the same time. */ | |
63 | err = __put_user(from->si_signo, &to->si_signo); | |
64 | err |= __put_user(from->si_errno, &to->si_errno); | |
65 | err |= __put_user((short)from->si_code, &to->si_code); | |
66 | if (from->si_code < 0) | |
67 | err |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE); | |
68 | else { | |
69 | switch (from->si_code >> 16) { | |
70 | case __SI_RT >> 16: /* This is not generated by the kernel as of now. */ | |
71 | case __SI_MESGQ >> 16: | |
72 | err |= __put_user(from->si_int, &to->si_int); | |
73 | /* fallthrough */ | |
74 | case __SI_KILL >> 16: | |
75 | err |= __put_user(from->si_pid, &to->si_pid); | |
76 | err |= __put_user(from->si_uid, &to->si_uid); | |
77 | break; | |
78 | case __SI_CHLD >> 16: | |
79 | err |= __put_user(from->si_pid, &to->si_pid); | |
80 | err |= __put_user(from->si_uid, &to->si_uid); | |
81 | err |= __put_user(from->si_utime, &to->si_utime); | |
82 | err |= __put_user(from->si_stime, &to->si_stime); | |
83 | err |= __put_user(from->si_status, &to->si_status); | |
84 | break; | |
85 | case __SI_FAULT >> 16: | |
86 | err |= __put_user((unsigned long) from->si_addr, | |
87 | &to->si_addr); | |
88 | break; | |
89 | case __SI_POLL >> 16: | |
90 | err |= __put_user(from->si_band, &to->si_band); | |
91 | err |= __put_user(from->si_fd, &to->si_fd); | |
92 | break; | |
93 | case __SI_TIMER >> 16: | |
94 | err |= __put_user(from->si_tid, &to->si_tid); | |
95 | err |= __put_user(from->si_overrun, &to->si_overrun); | |
96 | err |= __put_user(from->si_int, &to->si_int); | |
97 | break; | |
98 | default: | |
99 | break; | |
100 | } | |
101 | } | |
0ebfd313 | 102 | return err ? -EFAULT : 0; |
1da177e4 LT |
103 | } |
104 | ||
105 | int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from) | |
106 | { | |
107 | int err; | |
108 | u32 tmp; | |
109 | ||
1da177e4 LT |
110 | err = __get_user(to->si_signo, &from->si_signo); |
111 | err |= __get_user(to->si_errno, &from->si_errno); | |
112 | err |= __get_user(to->si_code, &from->si_code); | |
113 | ||
114 | if (to->si_code < 0) | |
115 | err |= __copy_from_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE); | |
116 | else { | |
117 | switch (to->si_code >> 16) { | |
118 | case __SI_RT >> 16: /* This is not generated by the kernel as of now. */ | |
119 | case __SI_MESGQ >> 16: | |
120 | err |= __get_user(to->si_int, &from->si_int); | |
121 | /* fallthrough */ | |
122 | case __SI_KILL >> 16: | |
123 | err |= __get_user(to->si_pid, &from->si_pid); | |
124 | err |= __get_user(to->si_uid, &from->si_uid); | |
125 | break; | |
126 | case __SI_CHLD >> 16: | |
127 | err |= __get_user(to->si_pid, &from->si_pid); | |
128 | err |= __get_user(to->si_uid, &from->si_uid); | |
129 | err |= __get_user(to->si_utime, &from->si_utime); | |
130 | err |= __get_user(to->si_stime, &from->si_stime); | |
131 | err |= __get_user(to->si_status, &from->si_status); | |
132 | break; | |
133 | case __SI_FAULT >> 16: | |
134 | err |= __get_user(tmp, &from->si_addr); | |
3c52e49d MS |
135 | to->si_addr = (void __force __user *) |
136 | (u64) (tmp & PSW32_ADDR_INSN); | |
1da177e4 LT |
137 | break; |
138 | case __SI_POLL >> 16: | |
139 | err |= __get_user(to->si_band, &from->si_band); | |
140 | err |= __get_user(to->si_fd, &from->si_fd); | |
141 | break; | |
142 | case __SI_TIMER >> 16: | |
143 | err |= __get_user(to->si_tid, &from->si_tid); | |
144 | err |= __get_user(to->si_overrun, &from->si_overrun); | |
145 | err |= __get_user(to->si_int, &from->si_int); | |
146 | break; | |
147 | default: | |
148 | break; | |
149 | } | |
150 | } | |
0ebfd313 | 151 | return err ? -EFAULT : 0; |
1da177e4 LT |
152 | } |
153 | ||
1da177e4 LT |
154 | static int save_sigregs32(struct pt_regs *regs, _sigregs32 __user *sregs) |
155 | { | |
4725c860 MS |
156 | _sigregs32 user_sregs; |
157 | int i; | |
1da177e4 | 158 | |
5ebf250d HC |
159 | user_sregs.regs.psw.mask = (__u32)(regs->psw.mask >> 32); |
160 | user_sregs.regs.psw.mask &= PSW32_MASK_USER | PSW32_MASK_RI; | |
f26946d7 | 161 | user_sregs.regs.psw.mask |= PSW32_USER_BITS; |
4725c860 | 162 | user_sregs.regs.psw.addr = (__u32) regs->psw.addr | |
d4e81b35 | 163 | (__u32)(regs->psw.mask & PSW_MASK_BA); |
1da177e4 | 164 | for (i = 0; i < NUM_GPRS; i++) |
4725c860 | 165 | user_sregs.regs.gprs[i] = (__u32) regs->gprs[i]; |
1da177e4 | 166 | save_access_regs(current->thread.acrs); |
4725c860 MS |
167 | memcpy(&user_sregs.regs.acrs, current->thread.acrs, |
168 | sizeof(user_sregs.regs.acrs)); | |
169 | save_fp_ctl(¤t->thread.fp_regs.fpc); | |
170 | save_fp_regs(current->thread.fp_regs.fprs); | |
171 | memcpy(&user_sregs.fpregs, ¤t->thread.fp_regs, | |
172 | sizeof(user_sregs.fpregs)); | |
173 | if (__copy_to_user(sregs, &user_sregs, sizeof(_sigregs32))) | |
f8544ec4 HC |
174 | return -EFAULT; |
175 | return 0; | |
1da177e4 LT |
176 | } |
177 | ||
178 | static int restore_sigregs32(struct pt_regs *regs,_sigregs32 __user *sregs) | |
179 | { | |
4725c860 MS |
180 | _sigregs32 user_sregs; |
181 | int i; | |
1da177e4 LT |
182 | |
183 | /* Alwys make any pending restarted system call return -EINTR */ | |
184 | current_thread_info()->restart_block.fn = do_no_restart_syscall; | |
185 | ||
4725c860 | 186 | if (__copy_from_user(&user_sregs, &sregs->regs, sizeof(user_sregs))) |
f8544ec4 | 187 | return -EFAULT; |
4725c860 | 188 | |
5ebf250d HC |
189 | if (!is_ri_task(current) && (user_sregs.regs.psw.mask & PSW32_MASK_RI)) |
190 | return -EINVAL; | |
191 | ||
4725c860 MS |
192 | /* Loading the floating-point-control word can fail. Do that first. */ |
193 | if (restore_fp_ctl(&user_sregs.fpregs.fpc)) | |
194 | return -EINVAL; | |
195 | ||
196 | /* Use regs->psw.mask instead of PSW_USER_BITS to preserve PER bit. */ | |
aa7e04b3 | 197 | regs->psw.mask = (regs->psw.mask & ~(PSW_MASK_USER | PSW_MASK_RI)) | |
4725c860 | 198 | (__u64)(user_sregs.regs.psw.mask & PSW32_MASK_USER) << 32 | |
5ebf250d | 199 | (__u64)(user_sregs.regs.psw.mask & PSW32_MASK_RI) << 32 | |
4725c860 | 200 | (__u64)(user_sregs.regs.psw.addr & PSW32_ADDR_AMODE); |
fa968ee2 | 201 | /* Check for invalid user address space control. */ |
e258d719 MS |
202 | if ((regs->psw.mask & PSW_MASK_ASC) == PSW_ASC_HOME) |
203 | regs->psw.mask = PSW_ASC_PRIMARY | | |
fa968ee2 | 204 | (regs->psw.mask & ~PSW_MASK_ASC); |
4725c860 | 205 | regs->psw.addr = (__u64)(user_sregs.regs.psw.addr & PSW32_ADDR_INSN); |
1da177e4 | 206 | for (i = 0; i < NUM_GPRS; i++) |
4725c860 MS |
207 | regs->gprs[i] = (__u64) user_sregs.regs.gprs[i]; |
208 | memcpy(¤t->thread.acrs, &user_sregs.regs.acrs, | |
209 | sizeof(current->thread.acrs)); | |
1da177e4 LT |
210 | restore_access_regs(current->thread.acrs); |
211 | ||
4725c860 MS |
212 | memcpy(¤t->thread.fp_regs, &user_sregs.fpregs, |
213 | sizeof(current->thread.fp_regs)); | |
1da177e4 | 214 | |
4725c860 | 215 | restore_fp_regs(current->thread.fp_regs.fprs); |
d3a73acb | 216 | clear_pt_regs_flag(regs, PIF_SYSCALL); /* No longer in a system call */ |
1da177e4 LT |
217 | return 0; |
218 | } | |
219 | ||
ea2a4d3a HC |
220 | static int save_sigregs_gprs_high(struct pt_regs *regs, __u32 __user *uregs) |
221 | { | |
222 | __u32 gprs_high[NUM_GPRS]; | |
223 | int i; | |
224 | ||
225 | for (i = 0; i < NUM_GPRS; i++) | |
226 | gprs_high[i] = regs->gprs[i] >> 32; | |
f8544ec4 HC |
227 | if (__copy_to_user(uregs, &gprs_high, sizeof(gprs_high))) |
228 | return -EFAULT; | |
229 | return 0; | |
ea2a4d3a HC |
230 | } |
231 | ||
232 | static int restore_sigregs_gprs_high(struct pt_regs *regs, __u32 __user *uregs) | |
233 | { | |
234 | __u32 gprs_high[NUM_GPRS]; | |
f8544ec4 | 235 | int i; |
ea2a4d3a | 236 | |
f8544ec4 HC |
237 | if (__copy_from_user(&gprs_high, uregs, sizeof(gprs_high))) |
238 | return -EFAULT; | |
ea2a4d3a HC |
239 | for (i = 0; i < NUM_GPRS; i++) |
240 | *(__u32 *)®s->gprs[i] = gprs_high[i]; | |
241 | return 0; | |
242 | } | |
243 | ||
5b098c20 | 244 | COMPAT_SYSCALL_DEFINE0(sigreturn) |
1da177e4 | 245 | { |
03ff9a23 | 246 | struct pt_regs *regs = task_pt_regs(current); |
1da177e4 LT |
247 | sigframe32 __user *frame = (sigframe32 __user *)regs->gprs[15]; |
248 | sigset_t set; | |
249 | ||
1da177e4 LT |
250 | if (__copy_from_user(&set.sig, &frame->sc.oldmask, _SIGMASK_COPY_SIZE32)) |
251 | goto badframe; | |
391c62fe | 252 | set_current_blocked(&set); |
1da177e4 LT |
253 | if (restore_sigregs32(regs, &frame->sregs)) |
254 | goto badframe; | |
ea2a4d3a HC |
255 | if (restore_sigregs_gprs_high(regs, frame->gprs_high)) |
256 | goto badframe; | |
1da177e4 | 257 | return regs->gprs[2]; |
1da177e4 LT |
258 | badframe: |
259 | force_sig(SIGSEGV, current); | |
260 | return 0; | |
261 | } | |
262 | ||
5b098c20 | 263 | COMPAT_SYSCALL_DEFINE0(rt_sigreturn) |
1da177e4 | 264 | { |
03ff9a23 | 265 | struct pt_regs *regs = task_pt_regs(current); |
1da177e4 LT |
266 | rt_sigframe32 __user *frame = (rt_sigframe32 __user *)regs->gprs[15]; |
267 | sigset_t set; | |
1da177e4 | 268 | |
1da177e4 LT |
269 | if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set))) |
270 | goto badframe; | |
391c62fe | 271 | set_current_blocked(&set); |
1da177e4 LT |
272 | if (restore_sigregs32(regs, &frame->uc.uc_mcontext)) |
273 | goto badframe; | |
ea2a4d3a HC |
274 | if (restore_sigregs_gprs_high(regs, frame->gprs_high)) |
275 | goto badframe; | |
e214125a | 276 | if (compat_restore_altstack(&frame->uc.uc_stack)) |
1da177e4 | 277 | goto badframe; |
1da177e4 | 278 | return regs->gprs[2]; |
1da177e4 | 279 | badframe: |
03ff9a23 MS |
280 | force_sig(SIGSEGV, current); |
281 | return 0; | |
1da177e4 LT |
282 | } |
283 | ||
284 | /* | |
285 | * Set up a signal frame. | |
286 | */ | |
287 | ||
288 | ||
289 | /* | |
290 | * Determine which stack to use.. | |
291 | */ | |
292 | static inline void __user * | |
293 | get_sigframe(struct k_sigaction *ka, struct pt_regs * regs, size_t frame_size) | |
294 | { | |
295 | unsigned long sp; | |
296 | ||
297 | /* Default to using normal stack */ | |
298 | sp = (unsigned long) A(regs->gprs[15]); | |
299 | ||
de553438 HC |
300 | /* Overflow on alternate signal stack gives SIGSEGV. */ |
301 | if (on_sig_stack(sp) && !on_sig_stack((sp - frame_size) & -8UL)) | |
302 | return (void __user *) -1UL; | |
303 | ||
1da177e4 LT |
304 | /* This is the X/Open sanctioned signal stack switching. */ |
305 | if (ka->sa.sa_flags & SA_ONSTACK) { | |
28f22378 | 306 | if (! sas_ss_flags(sp)) |
1da177e4 LT |
307 | sp = current->sas_ss_sp + current->sas_ss_size; |
308 | } | |
309 | ||
1da177e4 LT |
310 | return (void __user *)((sp - frame_size) & -8ul); |
311 | } | |
312 | ||
313 | static inline int map_signal(int sig) | |
314 | { | |
315 | if (current_thread_info()->exec_domain | |
316 | && current_thread_info()->exec_domain->signal_invmap | |
317 | && sig < 32) | |
318 | return current_thread_info()->exec_domain->signal_invmap[sig]; | |
319 | else | |
320 | return sig; | |
321 | } | |
322 | ||
54dfe5dd | 323 | static int setup_frame32(int sig, struct k_sigaction *ka, |
1da177e4 LT |
324 | sigset_t *set, struct pt_regs * regs) |
325 | { | |
326 | sigframe32 __user *frame = get_sigframe(ka, regs, sizeof(sigframe32)); | |
1da177e4 | 327 | |
de553438 HC |
328 | if (frame == (void __user *) -1UL) |
329 | goto give_sigsegv; | |
330 | ||
1da177e4 LT |
331 | if (__copy_to_user(&frame->sc.oldmask, &set->sig, _SIGMASK_COPY_SIZE32)) |
332 | goto give_sigsegv; | |
333 | ||
334 | if (save_sigregs32(regs, &frame->sregs)) | |
335 | goto give_sigsegv; | |
ea2a4d3a HC |
336 | if (save_sigregs_gprs_high(regs, frame->gprs_high)) |
337 | goto give_sigsegv; | |
1da177e4 LT |
338 | if (__put_user((unsigned long) &frame->sregs, &frame->sc.sregs)) |
339 | goto give_sigsegv; | |
340 | ||
341 | /* Set up to return from userspace. If provided, use a stub | |
342 | already in userspace. */ | |
343 | if (ka->sa.sa_flags & SA_RESTORER) { | |
5b512beb | 344 | regs->gprs[14] = (__u64 __force) ka->sa.sa_restorer | PSW32_ADDR_AMODE; |
1da177e4 | 345 | } else { |
5b512beb | 346 | regs->gprs[14] = (__u64 __force) frame->retcode | PSW32_ADDR_AMODE; |
1da177e4 | 347 | if (__put_user(S390_SYSCALL_OPCODE | __NR_sigreturn, |
3c52e49d | 348 | (u16 __force __user *)(frame->retcode))) |
1da177e4 LT |
349 | goto give_sigsegv; |
350 | } | |
351 | ||
352 | /* Set up backchain. */ | |
353 | if (__put_user(regs->gprs[15], (unsigned int __user *) frame)) | |
354 | goto give_sigsegv; | |
355 | ||
356 | /* Set up registers for signal handler */ | |
3c52e49d | 357 | regs->gprs[15] = (__force __u64) frame; |
fa968ee2 MS |
358 | /* Force 31 bit amode and default user address space control. */ |
359 | regs->psw.mask = PSW_MASK_BA | | |
e258d719 | 360 | (PSW_USER_BITS & PSW_MASK_ASC) | |
fa968ee2 | 361 | (regs->psw.mask & ~PSW_MASK_ASC); |
3c52e49d | 362 | regs->psw.addr = (__force __u64) ka->sa.sa_handler; |
1da177e4 LT |
363 | |
364 | regs->gprs[2] = map_signal(sig); | |
3c52e49d | 365 | regs->gprs[3] = (__force __u64) &frame->sc; |
1da177e4 LT |
366 | |
367 | /* We forgot to include these in the sigcontext. | |
368 | To avoid breaking binary compatibility, they are passed as args. */ | |
aa33c8cb MS |
369 | if (sig == SIGSEGV || sig == SIGBUS || sig == SIGILL || |
370 | sig == SIGTRAP || sig == SIGFPE) { | |
371 | /* set extra registers only for synchronous signals */ | |
372 | regs->gprs[4] = regs->int_code & 127; | |
373 | regs->gprs[5] = regs->int_parm_long; | |
bd9e034e | 374 | regs->gprs[6] = task_thread_info(current)->last_break; |
aa33c8cb | 375 | } |
1da177e4 LT |
376 | |
377 | /* Place signal number on stack to allow backtrace from handler. */ | |
3c52e49d | 378 | if (__put_user(regs->gprs[2], (int __force __user *) &frame->signo)) |
1da177e4 | 379 | goto give_sigsegv; |
54dfe5dd | 380 | return 0; |
1da177e4 LT |
381 | |
382 | give_sigsegv: | |
383 | force_sigsegv(sig, current); | |
54dfe5dd | 384 | return -EFAULT; |
1da177e4 LT |
385 | } |
386 | ||
54dfe5dd | 387 | static int setup_rt_frame32(int sig, struct k_sigaction *ka, siginfo_t *info, |
1da177e4 LT |
388 | sigset_t *set, struct pt_regs * regs) |
389 | { | |
390 | int err = 0; | |
391 | rt_sigframe32 __user *frame = get_sigframe(ka, regs, sizeof(rt_sigframe32)); | |
1da177e4 | 392 | |
de553438 HC |
393 | if (frame == (void __user *) -1UL) |
394 | goto give_sigsegv; | |
395 | ||
1da177e4 LT |
396 | if (copy_siginfo_to_user32(&frame->info, info)) |
397 | goto give_sigsegv; | |
398 | ||
399 | /* Create the ucontext. */ | |
ea2a4d3a | 400 | err |= __put_user(UC_EXTENDED, &frame->uc.uc_flags); |
1da177e4 | 401 | err |= __put_user(0, &frame->uc.uc_link); |
e214125a | 402 | err |= __compat_save_altstack(&frame->uc.uc_stack, regs->gprs[15]); |
1da177e4 | 403 | err |= save_sigregs32(regs, &frame->uc.uc_mcontext); |
ea2a4d3a | 404 | err |= save_sigregs_gprs_high(regs, frame->gprs_high); |
1da177e4 LT |
405 | err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); |
406 | if (err) | |
407 | goto give_sigsegv; | |
408 | ||
409 | /* Set up to return from userspace. If provided, use a stub | |
410 | already in userspace. */ | |
411 | if (ka->sa.sa_flags & SA_RESTORER) { | |
5b512beb | 412 | regs->gprs[14] = (__u64 __force) ka->sa.sa_restorer | PSW32_ADDR_AMODE; |
1da177e4 | 413 | } else { |
5b512beb | 414 | regs->gprs[14] = (__u64 __force) frame->retcode | PSW32_ADDR_AMODE; |
41932bc1 MS |
415 | if (__put_user(S390_SYSCALL_OPCODE | __NR_rt_sigreturn, |
416 | (u16 __force __user *)(frame->retcode))) | |
417 | goto give_sigsegv; | |
1da177e4 LT |
418 | } |
419 | ||
420 | /* Set up backchain. */ | |
3c52e49d | 421 | if (__put_user(regs->gprs[15], (unsigned int __force __user *) frame)) |
1da177e4 LT |
422 | goto give_sigsegv; |
423 | ||
424 | /* Set up registers for signal handler */ | |
3c52e49d | 425 | regs->gprs[15] = (__force __u64) frame; |
fa968ee2 MS |
426 | /* Force 31 bit amode and default user address space control. */ |
427 | regs->psw.mask = PSW_MASK_BA | | |
e258d719 | 428 | (PSW_USER_BITS & PSW_MASK_ASC) | |
fa968ee2 | 429 | (regs->psw.mask & ~PSW_MASK_ASC); |
5b512beb | 430 | regs->psw.addr = (__u64 __force) ka->sa.sa_handler; |
1da177e4 LT |
431 | |
432 | regs->gprs[2] = map_signal(sig); | |
3c52e49d MS |
433 | regs->gprs[3] = (__force __u64) &frame->info; |
434 | regs->gprs[4] = (__force __u64) &frame->uc; | |
bd9e034e | 435 | regs->gprs[5] = task_thread_info(current)->last_break; |
54dfe5dd | 436 | return 0; |
1da177e4 LT |
437 | |
438 | give_sigsegv: | |
439 | force_sigsegv(sig, current); | |
54dfe5dd | 440 | return -EFAULT; |
1da177e4 LT |
441 | } |
442 | ||
443 | /* | |
444 | * OK, we're invoking a handler | |
445 | */ | |
446 | ||
a610d6e6 | 447 | void handle_signal32(unsigned long sig, struct k_sigaction *ka, |
391c62fe | 448 | siginfo_t *info, sigset_t *oldset, struct pt_regs *regs) |
1da177e4 | 449 | { |
54dfe5dd HC |
450 | int ret; |
451 | ||
1da177e4 LT |
452 | /* Set up the stack frame */ |
453 | if (ka->sa.sa_flags & SA_SIGINFO) | |
54dfe5dd | 454 | ret = setup_rt_frame32(sig, ka, info, oldset, regs); |
1da177e4 | 455 | else |
54dfe5dd | 456 | ret = setup_frame32(sig, ka, oldset, regs); |
391c62fe | 457 | if (ret) |
a610d6e6 | 458 | return; |
efee984c | 459 | signal_delivered(sig, info, ka, regs, |
a610d6e6 | 460 | test_thread_flag(TIF_SINGLE_STEP)); |
1da177e4 LT |
461 | } |
462 |