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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * PowerPC version |
3 | * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) | |
4 | * | |
5 | * Derived from "arch/i386/kernel/signal.c" | |
6 | * Copyright (C) 1991, 1992 Linus Torvalds | |
7 | * 1997-11-28 Modified for POSIX.1b signals by Richard Henderson | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License | |
11 | * as published by the Free Software Foundation; either version | |
12 | * 2 of the License, or (at your option) any later version. | |
13 | */ | |
14 | ||
1da177e4 LT |
15 | #include <linux/sched.h> |
16 | #include <linux/mm.h> | |
17 | #include <linux/smp.h> | |
1da177e4 LT |
18 | #include <linux/kernel.h> |
19 | #include <linux/signal.h> | |
20 | #include <linux/errno.h> | |
21 | #include <linux/wait.h> | |
22 | #include <linux/unistd.h> | |
23 | #include <linux/stddef.h> | |
24 | #include <linux/elf.h> | |
25 | #include <linux/ptrace.h> | |
26 | #include <linux/module.h> | |
27 | ||
28 | #include <asm/sigcontext.h> | |
29 | #include <asm/ucontext.h> | |
30 | #include <asm/uaccess.h> | |
31 | #include <asm/pgtable.h> | |
1da177e4 LT |
32 | #include <asm/unistd.h> |
33 | #include <asm/cacheflush.h> | |
a7f31841 | 34 | #include <asm/syscalls.h> |
1da177e4 LT |
35 | #include <asm/vdso.h> |
36 | ||
22e38f29 | 37 | #include "signal.h" |
1da177e4 | 38 | |
1da177e4 | 39 | #define DEBUG_SIG 0 |
1da177e4 | 40 | |
6741f3a7 | 41 | #define GP_REGS_SIZE min(sizeof(elf_gregset_t), sizeof(struct pt_regs)) |
1da177e4 LT |
42 | #define FP_REGS_SIZE sizeof(elf_fpregset_t) |
43 | ||
44 | #define TRAMP_TRACEBACK 3 | |
45 | #define TRAMP_SIZE 6 | |
46 | ||
47 | /* | |
48 | * When we have signals to deliver, we set up on the user stack, | |
49 | * going down from the original stack pointer: | |
50 | * 1) a rt_sigframe struct which contains the ucontext | |
51 | * 2) a gap of __SIGNAL_FRAMESIZE bytes which acts as a dummy caller | |
52 | * frame for the signal handler. | |
53 | */ | |
54 | ||
55 | struct rt_sigframe { | |
56 | /* sys_rt_sigreturn requires the ucontext be the first field */ | |
57 | struct ucontext uc; | |
58 | unsigned long _unused[2]; | |
59 | unsigned int tramp[TRAMP_SIZE]; | |
29e646df AV |
60 | struct siginfo __user *pinfo; |
61 | void __user *puc; | |
1da177e4 LT |
62 | struct siginfo info; |
63 | /* 64 bit ABI allows for 288 bytes below sp before decrementing it. */ | |
64 | char abigap[288]; | |
65 | } __attribute__ ((aligned (16))); | |
66 | ||
d0c3d534 OJ |
67 | static const char fmt32[] = KERN_INFO \ |
68 | "%s[%d]: bad frame in %s: %08lx nip %08lx lr %08lx\n"; | |
69 | static const char fmt64[] = KERN_INFO \ | |
70 | "%s[%d]: bad frame in %s: %016lx nip %016lx lr %016lx\n"; | |
71 | ||
1da177e4 LT |
72 | /* |
73 | * Set up the sigcontext for the signal frame. | |
74 | */ | |
75 | ||
76 | static long setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs, | |
16c29d18 MN |
77 | int signr, sigset_t *set, unsigned long handler, |
78 | int ctx_has_vsx_region) | |
1da177e4 LT |
79 | { |
80 | /* When CONFIG_ALTIVEC is set, we _always_ setup v_regs even if the | |
81 | * process never used altivec yet (MSR_VEC is zero in pt_regs of | |
82 | * the context). This is very important because we must ensure we | |
83 | * don't lose the VRSAVE content that may have been set prior to | |
84 | * the process doing its first vector operation | |
85 | * Userland shall check AT_HWCAP to know wether it can rely on the | |
86 | * v_regs pointer or not | |
87 | */ | |
88 | #ifdef CONFIG_ALTIVEC | |
89 | elf_vrreg_t __user *v_regs = (elf_vrreg_t __user *)(((unsigned long)sc->vmx_reserve + 15) & ~0xful); | |
90 | #endif | |
0be234a4 | 91 | unsigned long msr = regs->msr; |
1da177e4 LT |
92 | long err = 0; |
93 | ||
94 | flush_fp_to_thread(current); | |
95 | ||
1da177e4 LT |
96 | #ifdef CONFIG_ALTIVEC |
97 | err |= __put_user(v_regs, &sc->v_regs); | |
98 | ||
99 | /* save altivec registers */ | |
100 | if (current->thread.used_vr) { | |
101 | flush_altivec_to_thread(current); | |
102 | /* Copy 33 vec registers (vr0..31 and vscr) to the stack */ | |
103 | err |= __copy_to_user(v_regs, current->thread.vr, 33 * sizeof(vector128)); | |
104 | /* set MSR_VEC in the MSR value in the frame to indicate that sc->v_reg) | |
105 | * contains valid data. | |
106 | */ | |
0be234a4 | 107 | msr |= MSR_VEC; |
1da177e4 LT |
108 | } |
109 | /* We always copy to/from vrsave, it's 0 if we don't have or don't | |
110 | * use altivec. | |
111 | */ | |
112 | err |= __put_user(current->thread.vrsave, (u32 __user *)&v_regs[33]); | |
113 | #else /* CONFIG_ALTIVEC */ | |
114 | err |= __put_user(0, &sc->v_regs); | |
115 | #endif /* CONFIG_ALTIVEC */ | |
c6e6771b | 116 | flush_fp_to_thread(current); |
6a274c08 MN |
117 | /* copy fpr regs and fpscr */ |
118 | err |= copy_fpr_to_user(&sc->fp_regs, current); | |
c6e6771b | 119 | #ifdef CONFIG_VSX |
ce48b210 MN |
120 | /* |
121 | * Copy VSX low doubleword to local buffer for formatting, | |
122 | * then out to userspace. Update v_regs to point after the | |
123 | * VMX data. | |
124 | */ | |
16c29d18 | 125 | if (current->thread.used_vsr && ctx_has_vsx_region) { |
7c292170 | 126 | __giveup_vsx(current); |
ce48b210 | 127 | v_regs += ELF_NVRREG; |
6a274c08 | 128 | err |= copy_vsx_to_user(v_regs, current); |
ce48b210 MN |
129 | /* set MSR_VSX in the MSR value in the frame to |
130 | * indicate that sc->vs_reg) contains valid data. | |
131 | */ | |
132 | msr |= MSR_VSX; | |
133 | } | |
c6e6771b | 134 | #endif /* CONFIG_VSX */ |
1da177e4 | 135 | err |= __put_user(&sc->gp_regs, &sc->regs); |
1bd79336 | 136 | WARN_ON(!FULL_REGS(regs)); |
1da177e4 | 137 | err |= __copy_to_user(&sc->gp_regs, regs, GP_REGS_SIZE); |
0be234a4 | 138 | err |= __put_user(msr, &sc->gp_regs[PT_MSR]); |
1da177e4 LT |
139 | err |= __put_user(signr, &sc->signal); |
140 | err |= __put_user(handler, &sc->handler); | |
141 | if (set != NULL) | |
142 | err |= __put_user(set->sig[0], &sc->oldmask); | |
143 | ||
144 | return err; | |
145 | } | |
146 | ||
147 | /* | |
148 | * Restore the sigcontext from the signal frame. | |
149 | */ | |
150 | ||
151 | static long restore_sigcontext(struct pt_regs *regs, sigset_t *set, int sig, | |
152 | struct sigcontext __user *sc) | |
153 | { | |
154 | #ifdef CONFIG_ALTIVEC | |
155 | elf_vrreg_t __user *v_regs; | |
156 | #endif | |
157 | unsigned long err = 0; | |
158 | unsigned long save_r13 = 0; | |
1da177e4 | 159 | unsigned long msr; |
6a274c08 MN |
160 | #ifdef CONFIG_VSX |
161 | int i; | |
162 | #endif | |
1da177e4 LT |
163 | |
164 | /* If this is not a signal return, we preserve the TLS in r13 */ | |
165 | if (!sig) | |
166 | save_r13 = regs->gpr[13]; | |
167 | ||
fcbc5a97 SR |
168 | /* copy the GPRs */ |
169 | err |= __copy_from_user(regs->gpr, sc->gp_regs, sizeof(regs->gpr)); | |
170 | err |= __get_user(regs->nip, &sc->gp_regs[PT_NIP]); | |
fab5db97 PM |
171 | /* get MSR separately, transfer the LE bit if doing signal return */ |
172 | err |= __get_user(msr, &sc->gp_regs[PT_MSR]); | |
173 | if (sig) | |
174 | regs->msr = (regs->msr & ~MSR_LE) | (msr & MSR_LE); | |
fcbc5a97 SR |
175 | err |= __get_user(regs->orig_gpr3, &sc->gp_regs[PT_ORIG_R3]); |
176 | err |= __get_user(regs->ctr, &sc->gp_regs[PT_CTR]); | |
177 | err |= __get_user(regs->link, &sc->gp_regs[PT_LNK]); | |
178 | err |= __get_user(regs->xer, &sc->gp_regs[PT_XER]); | |
179 | err |= __get_user(regs->ccr, &sc->gp_regs[PT_CCR]); | |
fab5db97 | 180 | /* skip SOFTE */ |
9a81c16b | 181 | regs->trap = 0; |
fcbc5a97 SR |
182 | err |= __get_user(regs->dar, &sc->gp_regs[PT_DAR]); |
183 | err |= __get_user(regs->dsisr, &sc->gp_regs[PT_DSISR]); | |
184 | err |= __get_user(regs->result, &sc->gp_regs[PT_RESULT]); | |
1da177e4 LT |
185 | |
186 | if (!sig) | |
187 | regs->gpr[13] = save_r13; | |
1da177e4 LT |
188 | if (set != NULL) |
189 | err |= __get_user(set->sig[0], &sc->oldmask); | |
190 | ||
5388fb10 PM |
191 | /* |
192 | * Do this before updating the thread state in | |
193 | * current->thread.fpr/vr. That way, if we get preempted | |
194 | * and another task grabs the FPU/Altivec, it won't be | |
195 | * tempted to save the current CPU state into the thread_struct | |
196 | * and corrupt what we are writing there. | |
197 | */ | |
198 | discard_lazy_cpu_state(); | |
199 | ||
ae62fbb5 PM |
200 | /* |
201 | * Force reload of FP/VEC. | |
202 | * This has to be done before copying stuff into current->thread.fpr/vr | |
203 | * for the reasons explained in the previous comment. | |
204 | */ | |
ce48b210 | 205 | regs->msr &= ~(MSR_FP | MSR_FE0 | MSR_FE1 | MSR_VEC | MSR_VSX); |
ae62fbb5 | 206 | |
1da177e4 LT |
207 | #ifdef CONFIG_ALTIVEC |
208 | err |= __get_user(v_regs, &sc->v_regs); | |
1da177e4 LT |
209 | if (err) |
210 | return err; | |
7c85d1f9 PM |
211 | if (v_regs && !access_ok(VERIFY_READ, v_regs, 34 * sizeof(vector128))) |
212 | return -EFAULT; | |
1da177e4 LT |
213 | /* Copy 33 vec registers (vr0..31 and vscr) from the stack */ |
214 | if (v_regs != 0 && (msr & MSR_VEC) != 0) | |
215 | err |= __copy_from_user(current->thread.vr, v_regs, | |
216 | 33 * sizeof(vector128)); | |
217 | else if (current->thread.used_vr) | |
218 | memset(current->thread.vr, 0, 33 * sizeof(vector128)); | |
219 | /* Always get VRSAVE back */ | |
220 | if (v_regs != 0) | |
221 | err |= __get_user(current->thread.vrsave, (u32 __user *)&v_regs[33]); | |
222 | else | |
223 | current->thread.vrsave = 0; | |
224 | #endif /* CONFIG_ALTIVEC */ | |
c6e6771b | 225 | /* restore floating point */ |
6a274c08 MN |
226 | err |= copy_fpr_from_user(current, &sc->fp_regs); |
227 | #ifdef CONFIG_VSX | |
ce48b210 MN |
228 | /* |
229 | * Get additional VSX data. Update v_regs to point after the | |
230 | * VMX data. Copy VSX low doubleword from userspace to local | |
231 | * buffer for formatting, then into the taskstruct. | |
232 | */ | |
233 | v_regs += ELF_NVRREG; | |
234 | if ((msr & MSR_VSX) != 0) | |
6a274c08 | 235 | err |= copy_vsx_from_user(current, v_regs); |
ce48b210 | 236 | else |
6a274c08 MN |
237 | for (i = 0; i < 32 ; i++) |
238 | current->thread.fpr[i][TS_VSRLOWOFFSET] = 0; | |
c6e6771b | 239 | #endif |
1da177e4 LT |
240 | return err; |
241 | } | |
242 | ||
1da177e4 LT |
243 | /* |
244 | * Setup the trampoline code on the stack | |
245 | */ | |
246 | static long setup_trampoline(unsigned int syscall, unsigned int __user *tramp) | |
247 | { | |
248 | int i; | |
249 | long err = 0; | |
250 | ||
251 | /* addi r1, r1, __SIGNAL_FRAMESIZE # Pop the dummy stackframe */ | |
252 | err |= __put_user(0x38210000UL | (__SIGNAL_FRAMESIZE & 0xffff), &tramp[0]); | |
253 | /* li r0, __NR_[rt_]sigreturn| */ | |
254 | err |= __put_user(0x38000000UL | (syscall & 0xffff), &tramp[1]); | |
255 | /* sc */ | |
256 | err |= __put_user(0x44000002UL, &tramp[2]); | |
257 | ||
258 | /* Minimal traceback info */ | |
259 | for (i=TRAMP_TRACEBACK; i < TRAMP_SIZE ;i++) | |
260 | err |= __put_user(0, &tramp[i]); | |
261 | ||
262 | if (!err) | |
263 | flush_icache_range((unsigned long) &tramp[0], | |
264 | (unsigned long) &tramp[TRAMP_SIZE]); | |
265 | ||
266 | return err; | |
267 | } | |
268 | ||
c1cb299e MN |
269 | /* |
270 | * Userspace code may pass a ucontext which doesn't include VSX added | |
271 | * at the end. We need to check for this case. | |
272 | */ | |
273 | #define UCONTEXTSIZEWITHOUTVSX \ | |
274 | (sizeof(struct ucontext) - 32*sizeof(long)) | |
275 | ||
1da177e4 LT |
276 | /* |
277 | * Handle {get,set,swap}_context operations | |
278 | */ | |
279 | int sys_swapcontext(struct ucontext __user *old_ctx, | |
280 | struct ucontext __user *new_ctx, | |
281 | long ctx_size, long r6, long r7, long r8, struct pt_regs *regs) | |
282 | { | |
283 | unsigned char tmp; | |
284 | sigset_t set; | |
c1cb299e | 285 | unsigned long new_msr = 0; |
16c29d18 | 286 | int ctx_has_vsx_region = 0; |
1da177e4 | 287 | |
c1cb299e | 288 | if (new_ctx && |
16c29d18 | 289 | get_user(new_msr, &new_ctx->uc_mcontext.gp_regs[PT_MSR])) |
c1cb299e MN |
290 | return -EFAULT; |
291 | /* | |
292 | * Check that the context is not smaller than the original | |
293 | * size (with VMX but without VSX) | |
1da177e4 | 294 | */ |
c1cb299e | 295 | if (ctx_size < UCONTEXTSIZEWITHOUTVSX) |
1da177e4 | 296 | return -EINVAL; |
c1cb299e MN |
297 | /* |
298 | * If the new context state sets the MSR VSX bits but | |
299 | * it doesn't provide VSX state. | |
300 | */ | |
301 | if ((ctx_size < sizeof(struct ucontext)) && | |
302 | (new_msr & MSR_VSX)) | |
303 | return -EINVAL; | |
16c29d18 MN |
304 | /* Does the context have enough room to store VSX data? */ |
305 | if (ctx_size >= sizeof(struct ucontext)) | |
306 | ctx_has_vsx_region = 1; | |
307 | ||
1da177e4 | 308 | if (old_ctx != NULL) { |
16c29d18 MN |
309 | if (!access_ok(VERIFY_WRITE, old_ctx, ctx_size) |
310 | || setup_sigcontext(&old_ctx->uc_mcontext, regs, 0, NULL, 0, | |
311 | ctx_has_vsx_region) | |
1da177e4 LT |
312 | || __copy_to_user(&old_ctx->uc_sigmask, |
313 | ¤t->blocked, sizeof(sigset_t))) | |
314 | return -EFAULT; | |
315 | } | |
316 | if (new_ctx == NULL) | |
317 | return 0; | |
16c29d18 | 318 | if (!access_ok(VERIFY_READ, new_ctx, ctx_size) |
1da177e4 | 319 | || __get_user(tmp, (u8 __user *) new_ctx) |
16c29d18 | 320 | || __get_user(tmp, (u8 __user *) new_ctx + ctx_size - 1)) |
1da177e4 LT |
321 | return -EFAULT; |
322 | ||
323 | /* | |
324 | * If we get a fault copying the context into the kernel's | |
325 | * image of the user's registers, we can't just return -EFAULT | |
326 | * because the user's registers will be corrupted. For instance | |
327 | * the NIP value may have been updated but not some of the | |
328 | * other registers. Given that we have done the access_ok | |
329 | * and successfully read the first and last bytes of the region | |
330 | * above, this should only happen in an out-of-memory situation | |
331 | * or if another thread unmaps the region containing the context. | |
332 | * We kill the task with a SIGSEGV in this situation. | |
333 | */ | |
334 | ||
335 | if (__copy_from_user(&set, &new_ctx->uc_sigmask, sizeof(set))) | |
336 | do_exit(SIGSEGV); | |
337 | restore_sigmask(&set); | |
338 | if (restore_sigcontext(regs, NULL, 0, &new_ctx->uc_mcontext)) | |
339 | do_exit(SIGSEGV); | |
340 | ||
341 | /* This returns like rt_sigreturn */ | |
401d1f02 | 342 | set_thread_flag(TIF_RESTOREALL); |
1da177e4 LT |
343 | return 0; |
344 | } | |
345 | ||
346 | ||
347 | /* | |
348 | * Do a signal return; undo the signal stack. | |
349 | */ | |
350 | ||
351 | int sys_rt_sigreturn(unsigned long r3, unsigned long r4, unsigned long r5, | |
352 | unsigned long r6, unsigned long r7, unsigned long r8, | |
353 | struct pt_regs *regs) | |
354 | { | |
355 | struct ucontext __user *uc = (struct ucontext __user *)regs->gpr[1]; | |
356 | sigset_t set; | |
357 | ||
358 | /* Always make any pending restarted system calls return -EINTR */ | |
359 | current_thread_info()->restart_block.fn = do_no_restart_syscall; | |
360 | ||
361 | if (!access_ok(VERIFY_READ, uc, sizeof(*uc))) | |
362 | goto badframe; | |
363 | ||
364 | if (__copy_from_user(&set, &uc->uc_sigmask, sizeof(set))) | |
365 | goto badframe; | |
366 | restore_sigmask(&set); | |
367 | if (restore_sigcontext(regs, NULL, 1, &uc->uc_mcontext)) | |
368 | goto badframe; | |
369 | ||
370 | /* do_sigaltstack expects a __user pointer and won't modify | |
371 | * what's in there anyway | |
372 | */ | |
373 | do_sigaltstack(&uc->uc_stack, NULL, regs->gpr[1]); | |
374 | ||
401d1f02 DW |
375 | set_thread_flag(TIF_RESTOREALL); |
376 | return 0; | |
1da177e4 LT |
377 | |
378 | badframe: | |
379 | #if DEBUG_SIG | |
380 | printk("badframe in sys_rt_sigreturn, regs=%p uc=%p &uc->uc_mcontext=%p\n", | |
381 | regs, uc, &uc->uc_mcontext); | |
382 | #endif | |
d0c3d534 | 383 | if (show_unhandled_signals && printk_ratelimit()) |
9f0b0793 | 384 | printk(regs->msr & MSR_64BIT ? fmt64 : fmt32, |
d0c3d534 OJ |
385 | current->comm, current->pid, "rt_sigreturn", |
386 | (long)uc, regs->nip, regs->link); | |
387 | ||
1da177e4 LT |
388 | force_sig(SIGSEGV, current); |
389 | return 0; | |
390 | } | |
391 | ||
f478f543 | 392 | int handle_rt_signal64(int signr, struct k_sigaction *ka, siginfo_t *info, |
1da177e4 LT |
393 | sigset_t *set, struct pt_regs *regs) |
394 | { | |
395 | /* Handler is *really* a pointer to the function descriptor for | |
396 | * the signal routine. The first entry in the function | |
397 | * descriptor is the entry address of signal and the second | |
398 | * entry is the TOC value we need to use. | |
399 | */ | |
400 | func_descr_t __user *funct_desc_ptr; | |
401 | struct rt_sigframe __user *frame; | |
402 | unsigned long newsp = 0; | |
403 | long err = 0; | |
404 | ||
efbda860 | 405 | frame = get_sigframe(ka, regs, sizeof(*frame), 0); |
a3f61dc0 | 406 | if (unlikely(frame == NULL)) |
1da177e4 LT |
407 | goto badframe; |
408 | ||
409 | err |= __put_user(&frame->info, &frame->pinfo); | |
410 | err |= __put_user(&frame->uc, &frame->puc); | |
411 | err |= copy_siginfo_to_user(&frame->info, info); | |
412 | if (err) | |
413 | goto badframe; | |
414 | ||
415 | /* Create the ucontext. */ | |
416 | err |= __put_user(0, &frame->uc.uc_flags); | |
417 | err |= __put_user(0, &frame->uc.uc_link); | |
418 | err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp); | |
419 | err |= __put_user(sas_ss_flags(regs->gpr[1]), | |
420 | &frame->uc.uc_stack.ss_flags); | |
421 | err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size); | |
422 | err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, signr, NULL, | |
16c29d18 | 423 | (unsigned long)ka->sa.sa_handler, 1); |
1da177e4 LT |
424 | err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); |
425 | if (err) | |
426 | goto badframe; | |
427 | ||
cc657f53 PM |
428 | /* Make sure signal handler doesn't get spurious FP exceptions */ |
429 | current->thread.fpscr.val = 0; | |
430 | ||
1da177e4 | 431 | /* Set up to return from userspace. */ |
a5bba930 BH |
432 | if (vdso64_rt_sigtramp && current->mm->context.vdso_base) { |
433 | regs->link = current->mm->context.vdso_base + vdso64_rt_sigtramp; | |
1da177e4 LT |
434 | } else { |
435 | err |= setup_trampoline(__NR_rt_sigreturn, &frame->tramp[0]); | |
436 | if (err) | |
437 | goto badframe; | |
438 | regs->link = (unsigned long) &frame->tramp[0]; | |
439 | } | |
440 | funct_desc_ptr = (func_descr_t __user *) ka->sa.sa_handler; | |
441 | ||
442 | /* Allocate a dummy caller frame for the signal handler. */ | |
a3f61dc0 | 443 | newsp = ((unsigned long)frame) - __SIGNAL_FRAMESIZE; |
1da177e4 LT |
444 | err |= put_user(regs->gpr[1], (unsigned long __user *)newsp); |
445 | ||
446 | /* Set up "regs" so we "return" to the signal handler. */ | |
447 | err |= get_user(regs->nip, &funct_desc_ptr->entry); | |
fab5db97 PM |
448 | /* enter the signal handler in big-endian mode */ |
449 | regs->msr &= ~MSR_LE; | |
1da177e4 LT |
450 | regs->gpr[1] = newsp; |
451 | err |= get_user(regs->gpr[2], &funct_desc_ptr->toc); | |
452 | regs->gpr[3] = signr; | |
453 | regs->result = 0; | |
454 | if (ka->sa.sa_flags & SA_SIGINFO) { | |
455 | err |= get_user(regs->gpr[4], (unsigned long __user *)&frame->pinfo); | |
456 | err |= get_user(regs->gpr[5], (unsigned long __user *)&frame->puc); | |
457 | regs->gpr[6] = (unsigned long) frame; | |
458 | } else { | |
459 | regs->gpr[4] = (unsigned long)&frame->uc.uc_mcontext; | |
460 | } | |
461 | if (err) | |
462 | goto badframe; | |
463 | ||
1da177e4 LT |
464 | return 1; |
465 | ||
466 | badframe: | |
467 | #if DEBUG_SIG | |
468 | printk("badframe in setup_rt_frame, regs=%p frame=%p newsp=%lx\n", | |
469 | regs, frame, newsp); | |
470 | #endif | |
d0c3d534 | 471 | if (show_unhandled_signals && printk_ratelimit()) |
9f0b0793 | 472 | printk(regs->msr & MSR_64BIT ? fmt64 : fmt32, |
d0c3d534 OJ |
473 | current->comm, current->pid, "setup_rt_frame", |
474 | (long)frame, regs->nip, regs->link); | |
475 | ||
1da177e4 LT |
476 | force_sigsegv(signr, current); |
477 | return 0; | |
478 | } |