int do_signal(struct pt_regs *, sigset_t *);
-/*
- * Atomically swap in the new signal mask, and wait for a signal.
- */
-asmlinkage int
-sys_sigsuspend(old_sigset_t mask, unsigned long r1,
- unsigned long r2, unsigned long r3, unsigned long r4,
- unsigned long r5, unsigned long r6, struct pt_regs regs)
-{
- sigset_t saveset;
-
- mask &= _BLOCKABLE;
- spin_lock_irq(¤t->sighand->siglock);
- saveset = current->blocked;
- siginitset(¤t->blocked, mask);
- recalc_sigpending();
- spin_unlock_irq(¤t->sighand->siglock);
-
- regs.r0 = -EINTR;
- while (1) {
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- if (do_signal(®s, &saveset))
- return regs.r0;
- }
-}
-
asmlinkage int
sys_rt_sigsuspend(sigset_t *unewset, size_t sigsetsize,
unsigned long r2, unsigned long r3, unsigned long r4,
}
}
-asmlinkage int
-sys_sigaction(int sig, const struct old_sigaction __user *act,
- struct old_sigaction __user *oact)
-{
- struct k_sigaction new_ka, old_ka;
- int ret;
-
- if (act) {
- old_sigset_t mask;
- if (verify_area(VERIFY_READ, act, sizeof(*act)) ||
- __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
- __get_user(new_ka.sa.sa_restorer, &act->sa_restorer))
- return -EFAULT;
- __get_user(new_ka.sa.sa_flags, &act->sa_flags);
- __get_user(mask, &act->sa_mask);
- siginitset(&new_ka.sa.sa_mask, mask);
- }
-
- ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-
- if (!ret && oact) {
- if (verify_area(VERIFY_WRITE, oact, sizeof(*oact)) ||
- __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
- __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer))
- return -EFAULT;
- __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
- __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
- }
-
- return ret;
-}
-
asmlinkage int
sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
unsigned long r2, unsigned long r3, unsigned long r4,
* Do a signal return; undo the signal stack.
*/
-struct sigframe
-{
-// char *pretcode;
- int sig;
- struct sigcontext sc;
-// struct _fpstate fpstate;
- unsigned long extramask[_NSIG_WORDS-1];
- char retcode[4];
-};
-
struct rt_sigframe
{
-// char *pretcode;
int sig;
struct siginfo *pinfo;
void *puc;
struct siginfo info;
struct ucontext uc;
// struct _fpstate fpstate;
- char retcode[8];
};
static int
return err;
}
-asmlinkage int
-sys_sigreturn(unsigned long r0, unsigned long r1,
- unsigned long r2, unsigned long r3, unsigned long r4,
- unsigned long r5, unsigned long r6, struct pt_regs regs)
-{
- struct sigframe __user *frame = (struct sigframe __user *)regs.spu;
- sigset_t set;
- int result;
-
- if (verify_area(VERIFY_READ, frame, sizeof(*frame)))
- goto badframe;
- if (__get_user(set.sig[0], &frame->sc.oldmask)
- || (_NSIG_WORDS > 1
- && __copy_from_user(&set.sig[1], &frame->extramask,
- sizeof(frame->extramask))))
- goto badframe;
-
- sigdelsetmask(&set, ~_BLOCKABLE);
- spin_lock_irq(¤t->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(¤t->sighand->siglock);
-
- if (restore_sigcontext(®s, &frame->sc, &result))
- goto badframe;
- return result;
-
-badframe:
- force_sig(SIGSEGV, current);
- return 0;
-}
-
asmlinkage int
sys_rt_sigreturn(unsigned long r0, unsigned long r1,
unsigned long r2, unsigned long r3, unsigned long r4,
return (void __user *)((sp - frame_size) & -8ul);
}
-static void setup_frame(int sig, struct k_sigaction *ka,
- sigset_t *set, struct pt_regs *regs)
-{
- struct sigframe __user *frame;
- int err = 0;
- int signal;
-
- frame = get_sigframe(ka, regs->spu, sizeof(*frame));
-
- if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
- goto give_sigsegv;
-
- signal = current_thread_info()->exec_domain
- && current_thread_info()->exec_domain->signal_invmap
- && sig < 32
- ? current_thread_info()->exec_domain->signal_invmap[sig]
- : sig;
-
- err |= __put_user(signal, &frame->sig);
- if (err)
- goto give_sigsegv;
-
- err |= setup_sigcontext(&frame->sc, regs, set->sig[0]);
- if (err)
- goto give_sigsegv;
-
- if (_NSIG_WORDS > 1) {
- err |= __copy_to_user(frame->extramask, &set->sig[1],
- sizeof(frame->extramask));
- if (err)
- goto give_sigsegv;
- }
-
- if (ka->sa.sa_flags & SA_RESTORER)
- regs->lr = (unsigned long)ka->sa.sa_restorer;
- else {
- /* This is : ldi r7, #__NR_sigreturn ; trap #2 */
- unsigned long code = 0x670010f2 | (__NR_sigreturn << 16);
-
- regs->lr = (unsigned long)frame->retcode;
- err |= __put_user(code, (long __user *)(frame->retcode+0));
- if (err)
- goto give_sigsegv;
- flush_cache_sigtramp((unsigned long)frame->retcode);
- }
-
- /* Set up registers for signal handler */
- regs->spu = (unsigned long)frame;
- regs->r0 = signal; /* Arg for signal handler */
- regs->r1 = (unsigned long)&frame->sc;
- regs->bpc = (unsigned long)ka->sa.sa_handler;
-
- set_fs(USER_DS);
-
-#if DEBUG_SIG
- printk("SIG deliver (%s:%d): sp=%p pc=%p\n",
- current->comm, current->pid, frame, regs->pc);
-#endif
-
- return;
-
-give_sigsegv:
- force_sigsegv(sig, current);
-}
-
static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
sigset_t *set, struct pt_regs *regs)
{
goto give_sigsegv;
/* Set up to return from userspace. */
- if (ka->sa.sa_flags & SA_RESTORER)
- regs->lr = (unsigned long)ka->sa.sa_restorer;
- else {
- /* This is : ldi r7, #__NR_rt_sigreturn ; trap #2 */
- unsigned long code1 = 0x97f00000 | (__NR_rt_sigreturn);
- unsigned long code2 = 0x10f2f000;
-
- regs->lr = (unsigned long)frame->retcode;
- err |= __put_user(code1, (long __user *)(frame->retcode+0));
- err |= __put_user(code2, (long __user *)(frame->retcode+4));
- if (err)
- goto give_sigsegv;
- flush_cache_sigtramp((unsigned long)frame->retcode);
- }
+ regs->lr = (unsigned long)ka->sa.sa_restorer;
/* Set up registers for signal handler */
regs->spu = (unsigned long)frame;
}
/* Set up the stack frame */
- if (ka->sa.sa_flags & SA_SIGINFO)
- setup_rt_frame(sig, ka, info, oldset, regs);
- else
- setup_frame(sig, ka, oldset, regs);
+ setup_rt_frame(sig, ka, info, oldset, regs);
if (!(ka->sa.sa_flags & SA_NODEFER)) {
spin_lock_irq(¤t->sighand->siglock);
git://git.onelab.eu / linux-2.6.git / blobdiff