Commit | Line | Data |
---|---|---|
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> | |
76462232 | 27 | #include <linux/ratelimit.h> |
1da177e4 LT |
28 | |
29 | #include <asm/sigcontext.h> | |
30 | #include <asm/ucontext.h> | |
31 | #include <asm/uaccess.h> | |
32 | #include <asm/pgtable.h> | |
1da177e4 LT |
33 | #include <asm/unistd.h> |
34 | #include <asm/cacheflush.h> | |
a7f31841 | 35 | #include <asm/syscalls.h> |
1da177e4 LT |
36 | #include <asm/vdso.h> |
37 | ||
22e38f29 | 38 | #include "signal.h" |
1da177e4 | 39 | |
1da177e4 | 40 | #define DEBUG_SIG 0 |
1da177e4 | 41 | |
6741f3a7 | 42 | #define GP_REGS_SIZE min(sizeof(elf_gregset_t), sizeof(struct pt_regs)) |
1da177e4 LT |
43 | #define FP_REGS_SIZE sizeof(elf_fpregset_t) |
44 | ||
45 | #define TRAMP_TRACEBACK 3 | |
46 | #define TRAMP_SIZE 6 | |
47 | ||
48 | /* | |
49 | * When we have signals to deliver, we set up on the user stack, | |
50 | * going down from the original stack pointer: | |
51 | * 1) a rt_sigframe struct which contains the ucontext | |
52 | * 2) a gap of __SIGNAL_FRAMESIZE bytes which acts as a dummy caller | |
53 | * frame for the signal handler. | |
54 | */ | |
55 | ||
56 | struct rt_sigframe { | |
57 | /* sys_rt_sigreturn requires the ucontext be the first field */ | |
58 | struct ucontext uc; | |
59 | unsigned long _unused[2]; | |
60 | unsigned int tramp[TRAMP_SIZE]; | |
29e646df AV |
61 | struct siginfo __user *pinfo; |
62 | void __user *puc; | |
1da177e4 LT |
63 | struct siginfo info; |
64 | /* 64 bit ABI allows for 288 bytes below sp before decrementing it. */ | |
65 | char abigap[288]; | |
66 | } __attribute__ ((aligned (16))); | |
67 | ||
d0c3d534 OJ |
68 | static const char fmt32[] = KERN_INFO \ |
69 | "%s[%d]: bad frame in %s: %08lx nip %08lx lr %08lx\n"; | |
70 | static const char fmt64[] = KERN_INFO \ | |
71 | "%s[%d]: bad frame in %s: %016lx nip %016lx lr %016lx\n"; | |
72 | ||
1da177e4 LT |
73 | /* |
74 | * Set up the sigcontext for the signal frame. | |
75 | */ | |
76 | ||
77 | static long setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs, | |
16c29d18 MN |
78 | int signr, sigset_t *set, unsigned long handler, |
79 | int ctx_has_vsx_region) | |
1da177e4 LT |
80 | { |
81 | /* When CONFIG_ALTIVEC is set, we _always_ setup v_regs even if the | |
82 | * process never used altivec yet (MSR_VEC is zero in pt_regs of | |
83 | * the context). This is very important because we must ensure we | |
84 | * don't lose the VRSAVE content that may have been set prior to | |
85 | * the process doing its first vector operation | |
86 | * Userland shall check AT_HWCAP to know wether it can rely on the | |
87 | * v_regs pointer or not | |
88 | */ | |
89 | #ifdef CONFIG_ALTIVEC | |
90 | elf_vrreg_t __user *v_regs = (elf_vrreg_t __user *)(((unsigned long)sc->vmx_reserve + 15) & ~0xful); | |
91 | #endif | |
0be234a4 | 92 | unsigned long msr = regs->msr; |
1da177e4 LT |
93 | long err = 0; |
94 | ||
95 | flush_fp_to_thread(current); | |
96 | ||
1da177e4 LT |
97 | #ifdef CONFIG_ALTIVEC |
98 | err |= __put_user(v_regs, &sc->v_regs); | |
99 | ||
100 | /* save altivec registers */ | |
101 | if (current->thread.used_vr) { | |
102 | flush_altivec_to_thread(current); | |
103 | /* Copy 33 vec registers (vr0..31 and vscr) to the stack */ | |
104 | err |= __copy_to_user(v_regs, current->thread.vr, 33 * sizeof(vector128)); | |
105 | /* set MSR_VEC in the MSR value in the frame to indicate that sc->v_reg) | |
106 | * contains valid data. | |
107 | */ | |
0be234a4 | 108 | msr |= MSR_VEC; |
1da177e4 LT |
109 | } |
110 | /* We always copy to/from vrsave, it's 0 if we don't have or don't | |
111 | * use altivec. | |
112 | */ | |
113 | err |= __put_user(current->thread.vrsave, (u32 __user *)&v_regs[33]); | |
114 | #else /* CONFIG_ALTIVEC */ | |
115 | err |= __put_user(0, &sc->v_regs); | |
116 | #endif /* CONFIG_ALTIVEC */ | |
c6e6771b | 117 | flush_fp_to_thread(current); |
6a274c08 MN |
118 | /* copy fpr regs and fpscr */ |
119 | err |= copy_fpr_to_user(&sc->fp_regs, current); | |
c6e6771b | 120 | #ifdef CONFIG_VSX |
ce48b210 MN |
121 | /* |
122 | * Copy VSX low doubleword to local buffer for formatting, | |
123 | * then out to userspace. Update v_regs to point after the | |
124 | * VMX data. | |
125 | */ | |
16c29d18 | 126 | if (current->thread.used_vsr && ctx_has_vsx_region) { |
7c292170 | 127 | __giveup_vsx(current); |
ce48b210 | 128 | v_regs += ELF_NVRREG; |
6a274c08 | 129 | err |= copy_vsx_to_user(v_regs, current); |
ce48b210 MN |
130 | /* set MSR_VSX in the MSR value in the frame to |
131 | * indicate that sc->vs_reg) contains valid data. | |
132 | */ | |
133 | msr |= MSR_VSX; | |
134 | } | |
c6e6771b | 135 | #endif /* CONFIG_VSX */ |
1da177e4 | 136 | err |= __put_user(&sc->gp_regs, &sc->regs); |
1bd79336 | 137 | WARN_ON(!FULL_REGS(regs)); |
1da177e4 | 138 | err |= __copy_to_user(&sc->gp_regs, regs, GP_REGS_SIZE); |
0be234a4 | 139 | err |= __put_user(msr, &sc->gp_regs[PT_MSR]); |
1da177e4 LT |
140 | err |= __put_user(signr, &sc->signal); |
141 | err |= __put_user(handler, &sc->handler); | |
142 | if (set != NULL) | |
143 | err |= __put_user(set->sig[0], &sc->oldmask); | |
144 | ||
145 | return err; | |
146 | } | |
147 | ||
148 | /* | |
149 | * Restore the sigcontext from the signal frame. | |
150 | */ | |
151 | ||
152 | static long restore_sigcontext(struct pt_regs *regs, sigset_t *set, int sig, | |
153 | struct sigcontext __user *sc) | |
154 | { | |
155 | #ifdef CONFIG_ALTIVEC | |
156 | elf_vrreg_t __user *v_regs; | |
157 | #endif | |
158 | unsigned long err = 0; | |
159 | unsigned long save_r13 = 0; | |
1da177e4 | 160 | unsigned long msr; |
6a274c08 MN |
161 | #ifdef CONFIG_VSX |
162 | int i; | |
163 | #endif | |
1da177e4 LT |
164 | |
165 | /* If this is not a signal return, we preserve the TLS in r13 */ | |
166 | if (!sig) | |
167 | save_r13 = regs->gpr[13]; | |
168 | ||
fcbc5a97 SR |
169 | /* copy the GPRs */ |
170 | err |= __copy_from_user(regs->gpr, sc->gp_regs, sizeof(regs->gpr)); | |
171 | err |= __get_user(regs->nip, &sc->gp_regs[PT_NIP]); | |
fab5db97 PM |
172 | /* get MSR separately, transfer the LE bit if doing signal return */ |
173 | err |= __get_user(msr, &sc->gp_regs[PT_MSR]); | |
174 | if (sig) | |
175 | regs->msr = (regs->msr & ~MSR_LE) | (msr & MSR_LE); | |
fcbc5a97 SR |
176 | err |= __get_user(regs->orig_gpr3, &sc->gp_regs[PT_ORIG_R3]); |
177 | err |= __get_user(regs->ctr, &sc->gp_regs[PT_CTR]); | |
178 | err |= __get_user(regs->link, &sc->gp_regs[PT_LNK]); | |
179 | err |= __get_user(regs->xer, &sc->gp_regs[PT_XER]); | |
180 | err |= __get_user(regs->ccr, &sc->gp_regs[PT_CCR]); | |
fab5db97 | 181 | /* skip SOFTE */ |
9a81c16b | 182 | regs->trap = 0; |
fcbc5a97 SR |
183 | err |= __get_user(regs->dar, &sc->gp_regs[PT_DAR]); |
184 | err |= __get_user(regs->dsisr, &sc->gp_regs[PT_DSISR]); | |
185 | err |= __get_user(regs->result, &sc->gp_regs[PT_RESULT]); | |
1da177e4 LT |
186 | |
187 | if (!sig) | |
188 | regs->gpr[13] = save_r13; | |
1da177e4 LT |
189 | if (set != NULL) |
190 | err |= __get_user(set->sig[0], &sc->oldmask); | |
191 | ||
5388fb10 PM |
192 | /* |
193 | * Do this before updating the thread state in | |
194 | * current->thread.fpr/vr. That way, if we get preempted | |
195 | * and another task grabs the FPU/Altivec, it won't be | |
196 | * tempted to save the current CPU state into the thread_struct | |
197 | * and corrupt what we are writing there. | |
198 | */ | |
199 | discard_lazy_cpu_state(); | |
200 | ||
ae62fbb5 PM |
201 | /* |
202 | * Force reload of FP/VEC. | |
203 | * This has to be done before copying stuff into current->thread.fpr/vr | |
204 | * for the reasons explained in the previous comment. | |
205 | */ | |
ce48b210 | 206 | regs->msr &= ~(MSR_FP | MSR_FE0 | MSR_FE1 | MSR_VEC | MSR_VSX); |
ae62fbb5 | 207 | |
1da177e4 LT |
208 | #ifdef CONFIG_ALTIVEC |
209 | err |= __get_user(v_regs, &sc->v_regs); | |
1da177e4 LT |
210 | if (err) |
211 | return err; | |
7c85d1f9 PM |
212 | if (v_regs && !access_ok(VERIFY_READ, v_regs, 34 * sizeof(vector128))) |
213 | return -EFAULT; | |
1da177e4 LT |
214 | /* Copy 33 vec registers (vr0..31 and vscr) from the stack */ |
215 | if (v_regs != 0 && (msr & MSR_VEC) != 0) | |
216 | err |= __copy_from_user(current->thread.vr, v_regs, | |
217 | 33 * sizeof(vector128)); | |
218 | else if (current->thread.used_vr) | |
219 | memset(current->thread.vr, 0, 33 * sizeof(vector128)); | |
220 | /* Always get VRSAVE back */ | |
221 | if (v_regs != 0) | |
222 | err |= __get_user(current->thread.vrsave, (u32 __user *)&v_regs[33]); | |
223 | else | |
224 | current->thread.vrsave = 0; | |
225 | #endif /* CONFIG_ALTIVEC */ | |
c6e6771b | 226 | /* restore floating point */ |
6a274c08 MN |
227 | err |= copy_fpr_from_user(current, &sc->fp_regs); |
228 | #ifdef CONFIG_VSX | |
ce48b210 MN |
229 | /* |
230 | * Get additional VSX data. Update v_regs to point after the | |
231 | * VMX data. Copy VSX low doubleword from userspace to local | |
232 | * buffer for formatting, then into the taskstruct. | |
233 | */ | |
234 | v_regs += ELF_NVRREG; | |
235 | if ((msr & MSR_VSX) != 0) | |
6a274c08 | 236 | err |= copy_vsx_from_user(current, v_regs); |
ce48b210 | 237 | else |
6a274c08 MN |
238 | for (i = 0; i < 32 ; i++) |
239 | current->thread.fpr[i][TS_VSRLOWOFFSET] = 0; | |
c6e6771b | 240 | #endif |
1da177e4 LT |
241 | return err; |
242 | } | |
243 | ||
1da177e4 LT |
244 | /* |
245 | * Setup the trampoline code on the stack | |
246 | */ | |
247 | static long setup_trampoline(unsigned int syscall, unsigned int __user *tramp) | |
248 | { | |
249 | int i; | |
250 | long err = 0; | |
251 | ||
252 | /* addi r1, r1, __SIGNAL_FRAMESIZE # Pop the dummy stackframe */ | |
253 | err |= __put_user(0x38210000UL | (__SIGNAL_FRAMESIZE & 0xffff), &tramp[0]); | |
254 | /* li r0, __NR_[rt_]sigreturn| */ | |
255 | err |= __put_user(0x38000000UL | (syscall & 0xffff), &tramp[1]); | |
256 | /* sc */ | |
257 | err |= __put_user(0x44000002UL, &tramp[2]); | |
258 | ||
259 | /* Minimal traceback info */ | |
260 | for (i=TRAMP_TRACEBACK; i < TRAMP_SIZE ;i++) | |
261 | err |= __put_user(0, &tramp[i]); | |
262 | ||
263 | if (!err) | |
264 | flush_icache_range((unsigned long) &tramp[0], | |
265 | (unsigned long) &tramp[TRAMP_SIZE]); | |
266 | ||
267 | return err; | |
268 | } | |
269 | ||
c1cb299e MN |
270 | /* |
271 | * Userspace code may pass a ucontext which doesn't include VSX added | |
272 | * at the end. We need to check for this case. | |
273 | */ | |
274 | #define UCONTEXTSIZEWITHOUTVSX \ | |
275 | (sizeof(struct ucontext) - 32*sizeof(long)) | |
276 | ||
1da177e4 LT |
277 | /* |
278 | * Handle {get,set,swap}_context operations | |
279 | */ | |
280 | int sys_swapcontext(struct ucontext __user *old_ctx, | |
281 | struct ucontext __user *new_ctx, | |
282 | long ctx_size, long r6, long r7, long r8, struct pt_regs *regs) | |
283 | { | |
284 | unsigned char tmp; | |
285 | sigset_t set; | |
c1cb299e | 286 | unsigned long new_msr = 0; |
16c29d18 | 287 | int ctx_has_vsx_region = 0; |
1da177e4 | 288 | |
c1cb299e | 289 | if (new_ctx && |
16c29d18 | 290 | get_user(new_msr, &new_ctx->uc_mcontext.gp_regs[PT_MSR])) |
c1cb299e MN |
291 | return -EFAULT; |
292 | /* | |
293 | * Check that the context is not smaller than the original | |
294 | * size (with VMX but without VSX) | |
1da177e4 | 295 | */ |
c1cb299e | 296 | if (ctx_size < UCONTEXTSIZEWITHOUTVSX) |
1da177e4 | 297 | return -EINVAL; |
c1cb299e MN |
298 | /* |
299 | * If the new context state sets the MSR VSX bits but | |
300 | * it doesn't provide VSX state. | |
301 | */ | |
302 | if ((ctx_size < sizeof(struct ucontext)) && | |
303 | (new_msr & MSR_VSX)) | |
304 | return -EINVAL; | |
16c29d18 MN |
305 | /* Does the context have enough room to store VSX data? */ |
306 | if (ctx_size >= sizeof(struct ucontext)) | |
307 | ctx_has_vsx_region = 1; | |
308 | ||
1da177e4 | 309 | if (old_ctx != NULL) { |
16c29d18 MN |
310 | if (!access_ok(VERIFY_WRITE, old_ctx, ctx_size) |
311 | || setup_sigcontext(&old_ctx->uc_mcontext, regs, 0, NULL, 0, | |
312 | ctx_has_vsx_region) | |
1da177e4 LT |
313 | || __copy_to_user(&old_ctx->uc_sigmask, |
314 | ¤t->blocked, sizeof(sigset_t))) | |
315 | return -EFAULT; | |
316 | } | |
317 | if (new_ctx == NULL) | |
318 | return 0; | |
16c29d18 | 319 | if (!access_ok(VERIFY_READ, new_ctx, ctx_size) |
1da177e4 | 320 | || __get_user(tmp, (u8 __user *) new_ctx) |
16c29d18 | 321 | || __get_user(tmp, (u8 __user *) new_ctx + ctx_size - 1)) |
1da177e4 LT |
322 | return -EFAULT; |
323 | ||
324 | /* | |
325 | * If we get a fault copying the context into the kernel's | |
326 | * image of the user's registers, we can't just return -EFAULT | |
327 | * because the user's registers will be corrupted. For instance | |
328 | * the NIP value may have been updated but not some of the | |
329 | * other registers. Given that we have done the access_ok | |
330 | * and successfully read the first and last bytes of the region | |
331 | * above, this should only happen in an out-of-memory situation | |
332 | * or if another thread unmaps the region containing the context. | |
333 | * We kill the task with a SIGSEGV in this situation. | |
334 | */ | |
335 | ||
336 | if (__copy_from_user(&set, &new_ctx->uc_sigmask, sizeof(set))) | |
337 | do_exit(SIGSEGV); | |
338 | restore_sigmask(&set); | |
339 | if (restore_sigcontext(regs, NULL, 0, &new_ctx->uc_mcontext)) | |
340 | do_exit(SIGSEGV); | |
341 | ||
342 | /* This returns like rt_sigreturn */ | |
401d1f02 | 343 | set_thread_flag(TIF_RESTOREALL); |
1da177e4 LT |
344 | return 0; |
345 | } | |
346 | ||
347 | ||
348 | /* | |
349 | * Do a signal return; undo the signal stack. | |
350 | */ | |
351 | ||
352 | int sys_rt_sigreturn(unsigned long r3, unsigned long r4, unsigned long r5, | |
353 | unsigned long r6, unsigned long r7, unsigned long r8, | |
354 | struct pt_regs *regs) | |
355 | { | |
356 | struct ucontext __user *uc = (struct ucontext __user *)regs->gpr[1]; | |
357 | sigset_t set; | |
358 | ||
359 | /* Always make any pending restarted system calls return -EINTR */ | |
360 | current_thread_info()->restart_block.fn = do_no_restart_syscall; | |
361 | ||
362 | if (!access_ok(VERIFY_READ, uc, sizeof(*uc))) | |
363 | goto badframe; | |
364 | ||
365 | if (__copy_from_user(&set, &uc->uc_sigmask, sizeof(set))) | |
366 | goto badframe; | |
367 | restore_sigmask(&set); | |
368 | if (restore_sigcontext(regs, NULL, 1, &uc->uc_mcontext)) | |
369 | goto badframe; | |
370 | ||
371 | /* do_sigaltstack expects a __user pointer and won't modify | |
372 | * what's in there anyway | |
373 | */ | |
374 | do_sigaltstack(&uc->uc_stack, NULL, regs->gpr[1]); | |
375 | ||
401d1f02 DW |
376 | set_thread_flag(TIF_RESTOREALL); |
377 | return 0; | |
1da177e4 LT |
378 | |
379 | badframe: | |
380 | #if DEBUG_SIG | |
381 | printk("badframe in sys_rt_sigreturn, regs=%p uc=%p &uc->uc_mcontext=%p\n", | |
382 | regs, uc, &uc->uc_mcontext); | |
383 | #endif | |
76462232 CD |
384 | if (show_unhandled_signals) |
385 | printk_ratelimited(regs->msr & MSR_64BIT ? fmt64 : fmt32, | |
386 | current->comm, current->pid, "rt_sigreturn", | |
387 | (long)uc, regs->nip, regs->link); | |
d0c3d534 | 388 | |
1da177e4 LT |
389 | force_sig(SIGSEGV, current); |
390 | return 0; | |
391 | } | |
392 | ||
f478f543 | 393 | int handle_rt_signal64(int signr, struct k_sigaction *ka, siginfo_t *info, |
1da177e4 LT |
394 | sigset_t *set, struct pt_regs *regs) |
395 | { | |
396 | /* Handler is *really* a pointer to the function descriptor for | |
397 | * the signal routine. The first entry in the function | |
398 | * descriptor is the entry address of signal and the second | |
399 | * entry is the TOC value we need to use. | |
400 | */ | |
401 | func_descr_t __user *funct_desc_ptr; | |
402 | struct rt_sigframe __user *frame; | |
403 | unsigned long newsp = 0; | |
404 | long err = 0; | |
405 | ||
efbda860 | 406 | frame = get_sigframe(ka, regs, sizeof(*frame), 0); |
a3f61dc0 | 407 | if (unlikely(frame == NULL)) |
1da177e4 LT |
408 | goto badframe; |
409 | ||
410 | err |= __put_user(&frame->info, &frame->pinfo); | |
411 | err |= __put_user(&frame->uc, &frame->puc); | |
412 | err |= copy_siginfo_to_user(&frame->info, info); | |
413 | if (err) | |
414 | goto badframe; | |
415 | ||
416 | /* Create the ucontext. */ | |
417 | err |= __put_user(0, &frame->uc.uc_flags); | |
418 | err |= __put_user(0, &frame->uc.uc_link); | |
419 | err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp); | |
420 | err |= __put_user(sas_ss_flags(regs->gpr[1]), | |
421 | &frame->uc.uc_stack.ss_flags); | |
422 | err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size); | |
423 | err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, signr, NULL, | |
16c29d18 | 424 | (unsigned long)ka->sa.sa_handler, 1); |
1da177e4 LT |
425 | err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); |
426 | if (err) | |
427 | goto badframe; | |
428 | ||
cc657f53 PM |
429 | /* Make sure signal handler doesn't get spurious FP exceptions */ |
430 | current->thread.fpscr.val = 0; | |
431 | ||
1da177e4 | 432 | /* Set up to return from userspace. */ |
a5bba930 BH |
433 | if (vdso64_rt_sigtramp && current->mm->context.vdso_base) { |
434 | regs->link = current->mm->context.vdso_base + vdso64_rt_sigtramp; | |
1da177e4 LT |
435 | } else { |
436 | err |= setup_trampoline(__NR_rt_sigreturn, &frame->tramp[0]); | |
437 | if (err) | |
438 | goto badframe; | |
439 | regs->link = (unsigned long) &frame->tramp[0]; | |
440 | } | |
441 | funct_desc_ptr = (func_descr_t __user *) ka->sa.sa_handler; | |
442 | ||
443 | /* Allocate a dummy caller frame for the signal handler. */ | |
a3f61dc0 | 444 | newsp = ((unsigned long)frame) - __SIGNAL_FRAMESIZE; |
1da177e4 LT |
445 | err |= put_user(regs->gpr[1], (unsigned long __user *)newsp); |
446 | ||
447 | /* Set up "regs" so we "return" to the signal handler. */ | |
448 | err |= get_user(regs->nip, &funct_desc_ptr->entry); | |
fab5db97 PM |
449 | /* enter the signal handler in big-endian mode */ |
450 | regs->msr &= ~MSR_LE; | |
1da177e4 LT |
451 | regs->gpr[1] = newsp; |
452 | err |= get_user(regs->gpr[2], &funct_desc_ptr->toc); | |
453 | regs->gpr[3] = signr; | |
454 | regs->result = 0; | |
455 | if (ka->sa.sa_flags & SA_SIGINFO) { | |
456 | err |= get_user(regs->gpr[4], (unsigned long __user *)&frame->pinfo); | |
457 | err |= get_user(regs->gpr[5], (unsigned long __user *)&frame->puc); | |
458 | regs->gpr[6] = (unsigned long) frame; | |
459 | } else { | |
460 | regs->gpr[4] = (unsigned long)&frame->uc.uc_mcontext; | |
461 | } | |
462 | if (err) | |
463 | goto badframe; | |
464 | ||
1da177e4 LT |
465 | return 1; |
466 | ||
467 | badframe: | |
468 | #if DEBUG_SIG | |
469 | printk("badframe in setup_rt_frame, regs=%p frame=%p newsp=%lx\n", | |
470 | regs, frame, newsp); | |
471 | #endif | |
76462232 CD |
472 | if (show_unhandled_signals) |
473 | printk_ratelimited(regs->msr & MSR_64BIT ? fmt64 : fmt32, | |
474 | current->comm, current->pid, "setup_rt_frame", | |
475 | (long)frame, regs->nip, regs->link); | |
d0c3d534 | 476 | |
1da177e4 LT |
477 | force_sigsegv(signr, current); |
478 | return 0; | |
479 | } |