signal32.c (5632a9fbcd451892332d45553ce8b831d5143691) signal32.c (d11c2a0de2824395656cf8ed15811580c9dd38aa)
1/* arch/sparc64/kernel/signal32.c
2 *
3 * Copyright (C) 1991, 1992 Linus Torvalds
4 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
5 * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
6 * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
7 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
8 */

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133 if (copy_from_user(to, from, 3*sizeof(int)) ||
134 copy_from_user(to->_sifields._pad, from->_sifields._pad,
135 SI_PAD_SIZE))
136 return -EFAULT;
137
138 return 0;
139}
140
1/* arch/sparc64/kernel/signal32.c
2 *
3 * Copyright (C) 1991, 1992 Linus Torvalds
4 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
5 * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
6 * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
7 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
8 */

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133 if (copy_from_user(to, from, 3*sizeof(int)) ||
134 copy_from_user(to->_sifields._pad, from->_sifields._pad,
135 SI_PAD_SIZE))
136 return -EFAULT;
137
138 return 0;
139}
140
141/* Checks if the fp is valid. We always build signal frames which are
142 * 16-byte aligned, therefore we can always enforce that the restore
143 * frame has that property as well.
144 */
145static bool invalid_frame_pointer(void __user *fp, int fplen)
146{
147 if ((((unsigned long) fp) & 15) ||
148 ((unsigned long)fp) > 0x100000000ULL - fplen)
149 return true;
150 return false;
151}
152
141void do_sigreturn32(struct pt_regs *regs)
142{
143 struct signal_frame32 __user *sf;
144 compat_uptr_t fpu_save;
145 compat_uptr_t rwin_save;
153void do_sigreturn32(struct pt_regs *regs)
154{
155 struct signal_frame32 __user *sf;
156 compat_uptr_t fpu_save;
157 compat_uptr_t rwin_save;
146 unsigned int psr;
158 unsigned int psr, ufp;
147 unsigned int pc, npc;
148 sigset_t set;
149 compat_sigset_t seta;
150 int err, i;
151
152 /* Always make any pending restarted system calls return -EINTR */
153 current->restart_block.fn = do_no_restart_syscall;
154
155 synchronize_user_stack();
156
157 regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
158 sf = (struct signal_frame32 __user *) regs->u_regs[UREG_FP];
159
160 /* 1. Make sure we are not getting garbage from the user */
159 unsigned int pc, npc;
160 sigset_t set;
161 compat_sigset_t seta;
162 int err, i;
163
164 /* Always make any pending restarted system calls return -EINTR */
165 current->restart_block.fn = do_no_restart_syscall;
166
167 synchronize_user_stack();
168
169 regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
170 sf = (struct signal_frame32 __user *) regs->u_regs[UREG_FP];
171
172 /* 1. Make sure we are not getting garbage from the user */
161 if (!access_ok(VERIFY_READ, sf, sizeof(*sf)) ||
162 (((unsigned long) sf) & 3))
173 if (invalid_frame_pointer(sf, sizeof(*sf)))
163 goto segv;
164
174 goto segv;
175
165 if (get_user(pc, &sf->info.si_regs.pc) ||
176 if (get_user(ufp, &sf->info.si_regs.u_regs[UREG_FP]))
177 goto segv;
178
179 if (ufp & 0x7)
180 goto segv;
181
182 if (__get_user(pc, &sf->info.si_regs.pc) ||
166 __get_user(npc, &sf->info.si_regs.npc))
167 goto segv;
168
169 if ((pc | npc) & 3)
170 goto segv;
171
172 if (test_thread_flag(TIF_32BIT)) {
173 pc &= 0xffffffff;

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222
223segv:
224 force_sig(SIGSEGV, current);
225}
226
227asmlinkage void do_rt_sigreturn32(struct pt_regs *regs)
228{
229 struct rt_signal_frame32 __user *sf;
183 __get_user(npc, &sf->info.si_regs.npc))
184 goto segv;
185
186 if ((pc | npc) & 3)
187 goto segv;
188
189 if (test_thread_flag(TIF_32BIT)) {
190 pc &= 0xffffffff;

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239
240segv:
241 force_sig(SIGSEGV, current);
242}
243
244asmlinkage void do_rt_sigreturn32(struct pt_regs *regs)
245{
246 struct rt_signal_frame32 __user *sf;
230 unsigned int psr, pc, npc;
247 unsigned int psr, pc, npc, ufp;
231 compat_uptr_t fpu_save;
232 compat_uptr_t rwin_save;
233 sigset_t set;
234 compat_sigset_t seta;
235 int err, i;
236
237 /* Always make any pending restarted system calls return -EINTR */
238 current->restart_block.fn = do_no_restart_syscall;
239
240 synchronize_user_stack();
241 regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
242 sf = (struct rt_signal_frame32 __user *) regs->u_regs[UREG_FP];
243
244 /* 1. Make sure we are not getting garbage from the user */
248 compat_uptr_t fpu_save;
249 compat_uptr_t rwin_save;
250 sigset_t set;
251 compat_sigset_t seta;
252 int err, i;
253
254 /* Always make any pending restarted system calls return -EINTR */
255 current->restart_block.fn = do_no_restart_syscall;
256
257 synchronize_user_stack();
258 regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
259 sf = (struct rt_signal_frame32 __user *) regs->u_regs[UREG_FP];
260
261 /* 1. Make sure we are not getting garbage from the user */
245 if (!access_ok(VERIFY_READ, sf, sizeof(*sf)) ||
246 (((unsigned long) sf) & 3))
262 if (invalid_frame_pointer(sf, sizeof(*sf)))
247 goto segv;
248
263 goto segv;
264
249 if (get_user(pc, &sf->regs.pc) ||
265 if (get_user(ufp, &sf->regs.u_regs[UREG_FP]))
266 goto segv;
267
268 if (ufp & 0x7)
269 goto segv;
270
271 if (__get_user(pc, &sf->regs.pc) ||
250 __get_user(npc, &sf->regs.npc))
251 goto segv;
252
253 if ((pc | npc) & 3)
254 goto segv;
255
256 if (test_thread_flag(TIF_32BIT)) {
257 pc &= 0xffffffff;

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302
303 set.sig[0] = seta.sig[0] + (((long)seta.sig[1]) << 32);
304 set_current_blocked(&set);
305 return;
306segv:
307 force_sig(SIGSEGV, current);
308}
309
272 __get_user(npc, &sf->regs.npc))
273 goto segv;
274
275 if ((pc | npc) & 3)
276 goto segv;
277
278 if (test_thread_flag(TIF_32BIT)) {
279 pc &= 0xffffffff;

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324
325 set.sig[0] = seta.sig[0] + (((long)seta.sig[1]) << 32);
326 set_current_blocked(&set);
327 return;
328segv:
329 force_sig(SIGSEGV, current);
330}
331
310/* Checks if the fp is valid */
311static int invalid_frame_pointer(void __user *fp, int fplen)
312{
313 if ((((unsigned long) fp) & 7) || ((unsigned long)fp) > 0x100000000ULL - fplen)
314 return 1;
315 return 0;
316}
317
318static void __user *get_sigframe(struct ksignal *ksig, struct pt_regs *regs, unsigned long framesize)
319{
320 unsigned long sp;
321
322 regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
323 sp = regs->u_regs[UREG_FP];
324
325 /*

--- 469 unchanged lines hidden --- 		332static void __user *get_sigframe(struct ksignal *ksig, struct pt_regs *regs, unsigned long framesize)
333{
334 unsigned long sp;
335
336 regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
337 sp = regs->u_regs[UREG_FP];
338
339 /*

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