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authorAdrian Bunk <bunk@kernel.org>2008-07-24 00:28:50 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-24 13:47:24 -0400
commitf606ddf42fd4edc558eeb48bfee66d2c591571d2 (patch)
tree193f00db121201255b2629fce43b99a53c4ec735 /arch/v850/kernel/signal.c
parent99764fa4ceeecba8b9e0a8a5565b418a2e94f83b (diff)
remove the v850 port
Trying to compile the v850 port brings many compile errors, one of them exists since at least kernel 2.6.19. There also seems to be noone willing to bring this port back into a usable state. This patch therefore removes the v850 port. If anyone ever decides to revive the v850 port the code will still be available from older kernels, and it wouldn't be impossible for the port to reenter the kernel if it would become actively maintained again. Signed-off-by: Adrian Bunk <bunk@kernel.org> Acked-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/v850/kernel/signal.c')
-rw-r--r--arch/v850/kernel/signal.c523
1 files changed, 0 insertions, 523 deletions
diff --git a/arch/v850/kernel/signal.c b/arch/v850/kernel/signal.c
deleted file mode 100644
index bf166e7e762c..000000000000
--- a/arch/v850/kernel/signal.c
+++ /dev/null
@@ -1,523 +0,0 @@
1/*
2 * arch/v850/kernel/signal.c -- Signal handling
3 *
4 * Copyright (C) 2001,02,03 NEC Electronics Corporation
5 * Copyright (C) 2001,02,03 Miles Bader <miles@gnu.org>
6 * Copyright (C) 1999,2000,2002 Niibe Yutaka & Kaz Kojima
7 * Copyright (C) 1991,1992 Linus Torvalds
8 *
9 * This file is subject to the terms and conditions of the GNU General
10 * Public License. See the file COPYING in the main directory of this
11 * archive for more details.
12 *
13 * 1997-11-28 Modified for POSIX.1b signals by Richard Henderson
14 *
15 * This file was derived from the sh version, arch/sh/kernel/signal.c
16 */
17
18#include <linux/mm.h>
19#include <linux/smp.h>
20#include <linux/kernel.h>
21#include <linux/signal.h>
22#include <linux/errno.h>
23#include <linux/wait.h>
24#include <linux/ptrace.h>
25#include <linux/unistd.h>
26#include <linux/stddef.h>
27#include <linux/personality.h>
28#include <linux/tty.h>
29
30#include <asm/ucontext.h>
31#include <asm/uaccess.h>
32#include <asm/pgtable.h>
33#include <asm/pgalloc.h>
34#include <asm/thread_info.h>
35#include <asm/cacheflush.h>
36
37#define DEBUG_SIG 0
38
39#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
40
41asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset);
42
43/*
44 * Atomically swap in the new signal mask, and wait for a signal.
45 */
46asmlinkage int
47sys_sigsuspend(old_sigset_t mask, struct pt_regs *regs)
48{
49 sigset_t saveset;
50
51 mask &= _BLOCKABLE;
52 spin_lock_irq(&current->sighand->siglock);
53 saveset = current->blocked;
54 siginitset(&current->blocked, mask);
55 recalc_sigpending();
56 spin_unlock_irq(&current->sighand->siglock);
57
58 regs->gpr[GPR_RVAL] = -EINTR;
59 while (1) {
60 current->state = TASK_INTERRUPTIBLE;
61 schedule();
62 if (do_signal(regs, &saveset))
63 return -EINTR;
64 }
65}
66
67asmlinkage int
68sys_rt_sigsuspend(sigset_t *unewset, size_t sigsetsize,
69 struct pt_regs *regs)
70{
71 sigset_t saveset, newset;
72
73 /* XXX: Don't preclude handling different sized sigset_t's. */
74 if (sigsetsize != sizeof(sigset_t))
75 return -EINVAL;
76
77 if (copy_from_user(&newset, unewset, sizeof(newset)))
78 return -EFAULT;
79 sigdelsetmask(&newset, ~_BLOCKABLE);
80 spin_lock_irq(&current->sighand->siglock);
81 saveset = current->blocked;
82 current->blocked = newset;
83 recalc_sigpending();
84 spin_unlock_irq(&current->sighand->siglock);
85
86 regs->gpr[GPR_RVAL] = -EINTR;
87 while (1) {
88 current->state = TASK_INTERRUPTIBLE;
89 schedule();
90 if (do_signal(regs, &saveset))
91 return -EINTR;
92 }
93}
94
95asmlinkage int
96sys_sigaction(int sig, const struct old_sigaction *act,
97 struct old_sigaction *oact)
98{
99 struct k_sigaction new_ka, old_ka;
100 int ret;
101
102 if (act) {
103 old_sigset_t mask;
104 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
105 __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
106 __get_user(new_ka.sa.sa_restorer, &act->sa_restorer))
107 return -EFAULT;
108 __get_user(new_ka.sa.sa_flags, &act->sa_flags);
109 __get_user(mask, &act->sa_mask);
110 siginitset(&new_ka.sa.sa_mask, mask);
111 }
112
113 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
114
115 if (!ret && oact) {
116 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
117 __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
118 __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer))
119 return -EFAULT;
120 __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
121 __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
122 }
123
124 return ret;
125}
126
127asmlinkage int
128sys_sigaltstack(const stack_t *uss, stack_t *uoss,
129 struct pt_regs *regs)
130{
131 return do_sigaltstack(uss, uoss, regs->gpr[GPR_SP]);
132}
133
134
135/*
136 * Do a signal return; undo the signal stack.
137 */
138
139struct sigframe
140{
141 struct sigcontext sc;
142 unsigned long extramask[_NSIG_WORDS-1];
143 unsigned long tramp[2]; /* signal trampoline */
144};
145
146struct rt_sigframe
147{
148 struct siginfo info;
149 struct ucontext uc;
150 unsigned long tramp[2]; /* signal trampoline */
151};
152
153static int
154restore_sigcontext(struct pt_regs *regs, struct sigcontext *sc, int *rval_p)
155{
156 unsigned int err = 0;
157
158#define COPY(x) err |= __get_user(regs->x, &sc->regs.x)
159 COPY(gpr[0]); COPY(gpr[1]); COPY(gpr[2]); COPY(gpr[3]);
160 COPY(gpr[4]); COPY(gpr[5]); COPY(gpr[6]); COPY(gpr[7]);
161 COPY(gpr[8]); COPY(gpr[9]); COPY(gpr[10]); COPY(gpr[11]);
162 COPY(gpr[12]); COPY(gpr[13]); COPY(gpr[14]); COPY(gpr[15]);
163 COPY(gpr[16]); COPY(gpr[17]); COPY(gpr[18]); COPY(gpr[19]);
164 COPY(gpr[20]); COPY(gpr[21]); COPY(gpr[22]); COPY(gpr[23]);
165 COPY(gpr[24]); COPY(gpr[25]); COPY(gpr[26]); COPY(gpr[27]);
166 COPY(gpr[28]); COPY(gpr[29]); COPY(gpr[30]); COPY(gpr[31]);
167 COPY(pc); COPY(psw);
168 COPY(ctpc); COPY(ctpsw); COPY(ctbp);
169#undef COPY
170
171 return err;
172}
173
174asmlinkage int sys_sigreturn(struct pt_regs *regs)
175{
176 struct sigframe *frame = (struct sigframe *)regs->gpr[GPR_SP];
177 sigset_t set;
178 int rval;
179
180 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
181 goto badframe;
182
183 if (__get_user(set.sig[0], &frame->sc.oldmask)
184 || (_NSIG_WORDS > 1
185 && __copy_from_user(&set.sig[1], &frame->extramask,
186 sizeof(frame->extramask))))
187 goto badframe;
188
189 sigdelsetmask(&set, ~_BLOCKABLE);
190 spin_lock_irq(&current->sighand->siglock);
191 current->blocked = set;
192 recalc_sigpending();
193 spin_unlock_irq(&current->sighand->siglock);
194
195 if (restore_sigcontext(regs, &frame->sc, &rval))
196 goto badframe;
197 return rval;
198
199badframe:
200 force_sig(SIGSEGV, current);
201 return 0;
202}
203
204asmlinkage int sys_rt_sigreturn(struct pt_regs *regs)
205{
206 struct rt_sigframe *frame = (struct rt_sigframe *)regs->gpr[GPR_SP];
207 sigset_t set;
208 stack_t st;
209 int rval;
210
211 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
212 goto badframe;
213
214 if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
215 goto badframe;
216
217 sigdelsetmask(&set, ~_BLOCKABLE);
218 spin_lock_irq(&current->sighand->siglock);
219 current->blocked = set;
220 recalc_sigpending();
221 spin_unlock_irq(&current->sighand->siglock);
222
223 if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &rval))
224 goto badframe;
225
226 if (__copy_from_user(&st, &frame->uc.uc_stack, sizeof(st)))
227 goto badframe;
228 /* It is more difficult to avoid calling this function than to
229 call it and ignore errors. */
230 do_sigaltstack(&st, NULL, regs->gpr[GPR_SP]);
231
232 return rval;
233
234badframe:
235 force_sig(SIGSEGV, current);
236 return 0;
237}
238
239/*
240 * Set up a signal frame.
241 */
242
243static int
244setup_sigcontext(struct sigcontext *sc, struct pt_regs *regs,
245 unsigned long mask)
246{
247 int err = 0;
248
249#define COPY(x) err |= __put_user(regs->x, &sc->regs.x)
250 COPY(gpr[0]); COPY(gpr[1]); COPY(gpr[2]); COPY(gpr[3]);
251 COPY(gpr[4]); COPY(gpr[5]); COPY(gpr[6]); COPY(gpr[7]);
252 COPY(gpr[8]); COPY(gpr[9]); COPY(gpr[10]); COPY(gpr[11]);
253 COPY(gpr[12]); COPY(gpr[13]); COPY(gpr[14]); COPY(gpr[15]);
254 COPY(gpr[16]); COPY(gpr[17]); COPY(gpr[18]); COPY(gpr[19]);
255 COPY(gpr[20]); COPY(gpr[21]); COPY(gpr[22]); COPY(gpr[23]);
256 COPY(gpr[24]); COPY(gpr[25]); COPY(gpr[26]); COPY(gpr[27]);
257 COPY(gpr[28]); COPY(gpr[29]); COPY(gpr[30]); COPY(gpr[31]);
258 COPY(pc); COPY(psw);
259 COPY(ctpc); COPY(ctpsw); COPY(ctbp);
260#undef COPY
261
262 err |= __put_user(mask, &sc->oldmask);
263
264 return err;
265}
266
267/*
268 * Determine which stack to use..
269 */
270static inline void *
271get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
272{
273 /* Default to using normal stack */
274 unsigned long sp = regs->gpr[GPR_SP];
275
276 if ((ka->sa.sa_flags & SA_ONSTACK) != 0 && ! sas_ss_flags(sp))
277 sp = current->sas_ss_sp + current->sas_ss_size;
278
279 return (void *)((sp - frame_size) & -8UL);
280}
281
282static void setup_frame(int sig, struct k_sigaction *ka,
283 sigset_t *set, struct pt_regs *regs)
284{
285 struct sigframe *frame;
286 int err = 0;
287 int signal;
288
289 frame = get_sigframe(ka, regs, sizeof(*frame));
290
291 if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
292 goto give_sigsegv;
293
294 signal = current_thread_info()->exec_domain
295 && current_thread_info()->exec_domain->signal_invmap
296 && sig < 32
297 ? current_thread_info()->exec_domain->signal_invmap[sig]
298 : sig;
299
300 err |= setup_sigcontext(&frame->sc, regs, set->sig[0]);
301
302 if (_NSIG_WORDS > 1) {
303 err |= __copy_to_user(frame->extramask, &set->sig[1],
304 sizeof(frame->extramask));
305 }
306
307 /* Set up to return from userspace. If provided, use a stub
308 already in userspace. */
309 if (ka->sa.sa_flags & SA_RESTORER) {
310 regs->gpr[GPR_LP] = (unsigned long) ka->sa.sa_restorer;
311 } else {
312 /* Note, these encodings are _little endian_! */
313
314 /* addi __NR_sigreturn, r0, r12 */
315 err |= __put_user(0x6600 | (__NR_sigreturn << 16),
316 frame->tramp + 0);
317 /* trap 0 */
318 err |= __put_user(0x010007e0,
319 frame->tramp + 1);
320
321 regs->gpr[GPR_LP] = (unsigned long)frame->tramp;
322
323 flush_cache_sigtramp (regs->gpr[GPR_LP]);
324 }
325
326 if (err)
327 goto give_sigsegv;
328
329 /* Set up registers for signal handler. */
330 regs->pc = (v850_reg_t) ka->sa.sa_handler;
331 regs->gpr[GPR_SP] = (v850_reg_t)frame;
332 /* Signal handler args: */
333 regs->gpr[GPR_ARG0] = signal; /* arg 0: signum */
334 regs->gpr[GPR_ARG1] = (v850_reg_t)&frame->sc;/* arg 1: sigcontext */
335
336 set_fs(USER_DS);
337
338#if DEBUG_SIG
339 printk("SIG deliver (%s:%d): sp=%p pc=%08lx ra=%08lx\n",
340 current->comm, current->pid, frame, regs->pc, );
341#endif
342
343 return;
344
345give_sigsegv:
346 force_sigsegv(sig, current);
347}
348
349static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
350 sigset_t *set, struct pt_regs *regs)
351{
352 struct rt_sigframe *frame;
353 int err = 0;
354 int signal;
355
356 frame = get_sigframe(ka, regs, sizeof(*frame));
357
358 if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
359 goto give_sigsegv;
360
361 signal = current_thread_info()->exec_domain
362 && current_thread_info()->exec_domain->signal_invmap
363 && sig < 32
364 ? current_thread_info()->exec_domain->signal_invmap[sig]
365 : sig;
366
367 err |= copy_siginfo_to_user(&frame->info, info);
368
369 /* Create the ucontext. */
370 err |= __put_user(0, &frame->uc.uc_flags);
371 err |= __put_user(0, &frame->uc.uc_link);
372 err |= __put_user((void *)current->sas_ss_sp,
373 &frame->uc.uc_stack.ss_sp);
374 err |= __put_user(sas_ss_flags(regs->gpr[GPR_SP]),
375 &frame->uc.uc_stack.ss_flags);
376 err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
377 err |= setup_sigcontext(&frame->uc.uc_mcontext,
378 regs, set->sig[0]);
379 err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
380
381 /* Set up to return from userspace. If provided, use a stub
382 already in userspace. */
383 if (ka->sa.sa_flags & SA_RESTORER) {
384 regs->gpr[GPR_LP] = (unsigned long) ka->sa.sa_restorer;
385 } else {
386 /* Note, these encodings are _little endian_! */
387
388 /* addi __NR_sigreturn, r0, r12 */
389 err |= __put_user(0x6600 | (__NR_sigreturn << 16),
390 frame->tramp + 0);
391 /* trap 0 */
392 err |= __put_user(0x010007e0,
393 frame->tramp + 1);
394
395 regs->gpr[GPR_LP] = (unsigned long)frame->tramp;
396
397 flush_cache_sigtramp (regs->gpr[GPR_LP]);
398 }
399
400 if (err)
401 goto give_sigsegv;
402
403 /* Set up registers for signal handler. */
404 regs->pc = (v850_reg_t) ka->sa.sa_handler;
405 regs->gpr[GPR_SP] = (v850_reg_t)frame;
406 /* Signal handler args: */
407 regs->gpr[GPR_ARG0] = signal; /* arg 0: signum */
408 regs->gpr[GPR_ARG1] = (v850_reg_t)&frame->info; /* arg 1: siginfo */
409 regs->gpr[GPR_ARG2] = (v850_reg_t)&frame->uc; /* arg 2: ucontext */
410
411 set_fs(USER_DS);
412
413#if DEBUG_SIG
414 printk("SIG deliver (%s:%d): sp=%p pc=%08lx pr=%08lx\n",
415 current->comm, current->pid, frame, regs->pc, regs->pr);
416#endif
417
418 return;
419
420give_sigsegv:
421 force_sigsegv(sig, current);
422}
423
424/*
425 * OK, we're invoking a handler
426 */
427
428static void
429handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
430 sigset_t *oldset, struct pt_regs * regs)
431{
432 /* Are we from a system call? */
433 if (PT_REGS_SYSCALL (regs)) {
434 /* If so, check system call restarting.. */
435 switch (regs->gpr[GPR_RVAL]) {
436 case -ERESTART_RESTARTBLOCK:
437 current_thread_info()->restart_block.fn =
438 do_no_restart_syscall;
439 /* fall through */
440 case -ERESTARTNOHAND:
441 regs->gpr[GPR_RVAL] = -EINTR;
442 break;
443
444 case -ERESTARTSYS:
445 if (!(ka->sa.sa_flags & SA_RESTART)) {
446 regs->gpr[GPR_RVAL] = -EINTR;
447 break;
448 }
449 /* fallthrough */
450 case -ERESTARTNOINTR:
451 regs->gpr[12] = PT_REGS_SYSCALL (regs);
452 regs->pc -= 4; /* Size of `trap 0' insn. */
453 }
454
455 PT_REGS_SET_SYSCALL (regs, 0);
456 }
457
458 /* Set up the stack frame */
459 if (ka->sa.sa_flags & SA_SIGINFO)
460 setup_rt_frame(sig, ka, info, oldset, regs);
461 else
462 setup_frame(sig, ka, oldset, regs);
463
464 spin_lock_irq(&current->sighand->siglock);
465 sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
466 if (!(ka->sa.sa_flags & SA_NODEFER))
467 sigaddset(&current->blocked,sig);
468 recalc_sigpending();
469 spin_unlock_irq(&current->sighand->siglock);
470}
471
472/*
473 * Note that 'init' is a special process: it doesn't get signals it doesn't
474 * want to handle. Thus you cannot kill init even with a SIGKILL even by
475 * mistake.
476 *
477 * Note that we go through the signals twice: once to check the signals that
478 * the kernel can handle, and then we build all the user-level signal handling
479 * stack-frames in one go after that.
480 */
481int do_signal(struct pt_regs *regs, sigset_t *oldset)
482{
483 siginfo_t info;
484 int signr;
485 struct k_sigaction ka;
486
487 /*
488 * We want the common case to go fast, which
489 * is why we may in certain cases get here from
490 * kernel mode. Just return without doing anything
491 * if so.
492 */
493 if (!user_mode(regs))
494 return 1;
495
496 if (!oldset)
497 oldset = &current->blocked;
498
499 signr = get_signal_to_deliver(&info, &ka, regs, NULL);
500 if (signr > 0) {
501 /* Whee! Actually deliver the signal. */
502 handle_signal(signr, &info, &ka, oldset, regs);
503 return 1;
504 }
505
506 /* Did we come from a system call? */
507 if (PT_REGS_SYSCALL (regs)) {
508 int rval = (int)regs->gpr[GPR_RVAL];
509 /* Restart the system call - no handlers present */
510 if (rval == -ERESTARTNOHAND
511 || rval == -ERESTARTSYS
512 || rval == -ERESTARTNOINTR)
513 {
514 regs->gpr[12] = PT_REGS_SYSCALL (regs);
515 regs->pc -= 4; /* Size of `trap 0' insn. */
516 }
517 else if (rval == -ERESTART_RESTARTBLOCK) {
518 regs->gpr[12] = __NR_restart_syscall;
519 regs->pc -= 4; /* Size of `trap 0' insn. */
520 }
521 }
522 return 0;
523}
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