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Diffstat (limited to 'kernel/signal.c')
-rw-r--r--kernel/signal.c72
1 files changed, 55 insertions, 17 deletions
diff --git a/kernel/signal.c b/kernel/signal.c
index caed9133ae52..6bd53c8189f0 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -2682,6 +2682,51 @@ COMPAT_SYSCALL_DEFINE2(rt_sigpending, compat_sigset_t __user *, uset,
}
#endif
+enum siginfo_layout siginfo_layout(int sig, int si_code)
+{
+ enum siginfo_layout layout = SIL_KILL;
+ if ((si_code > SI_USER) && (si_code < SI_KERNEL)) {
+ static const struct {
+ unsigned char limit, layout;
+ } filter[] = {
+ [SIGILL] = { NSIGILL, SIL_FAULT },
+ [SIGFPE] = { NSIGFPE, SIL_FAULT },
+ [SIGSEGV] = { NSIGSEGV, SIL_FAULT },
+ [SIGBUS] = { NSIGBUS, SIL_FAULT },
+ [SIGTRAP] = { NSIGTRAP, SIL_FAULT },
+#if defined(SIGMET) && defined(NSIGEMT)
+ [SIGEMT] = { NSIGEMT, SIL_FAULT },
+#endif
+ [SIGCHLD] = { NSIGCHLD, SIL_CHLD },
+ [SIGPOLL] = { NSIGPOLL, SIL_POLL },
+#ifdef __ARCH_SIGSYS
+ [SIGSYS] = { NSIGSYS, SIL_SYS },
+#endif
+ };
+ if ((sig < ARRAY_SIZE(filter)) && (si_code <= filter[sig].limit))
+ layout = filter[sig].layout;
+ else if (si_code <= NSIGPOLL)
+ layout = SIL_POLL;
+ } else {
+ if (si_code == SI_TIMER)
+ layout = SIL_TIMER;
+ else if (si_code == SI_SIGIO)
+ layout = SIL_POLL;
+ else if (si_code < 0)
+ layout = SIL_RT;
+ /* Tests to support buggy kernel ABIs */
+#ifdef TRAP_FIXME
+ if ((sig == SIGTRAP) && (si_code == TRAP_FIXME))
+ layout = SIL_FAULT;
+#endif
+#ifdef FPE_FIXME
+ if ((sig == SIGFPE) && (si_code == FPE_FIXME))
+ layout = SIL_FAULT;
+#endif
+ }
+ return layout;
+}
+
#ifndef HAVE_ARCH_COPY_SIGINFO_TO_USER
int copy_siginfo_to_user(siginfo_t __user *to, const siginfo_t *from)
@@ -2704,22 +2749,20 @@ int copy_siginfo_to_user(siginfo_t __user *to, const siginfo_t *from)
*/
err = __put_user(from->si_signo, &to->si_signo);
err |= __put_user(from->si_errno, &to->si_errno);
- err |= __put_user((short)from->si_code, &to->si_code);
- switch (from->si_code & __SI_MASK) {
- case __SI_KILL:
+ err |= __put_user(from->si_code, &to->si_code);
+ switch (siginfo_layout(from->si_signo, from->si_code)) {
+ case SIL_KILL:
err |= __put_user(from->si_pid, &to->si_pid);
err |= __put_user(from->si_uid, &to->si_uid);
break;
- case __SI_TIMER:
- err |= __put_user(from->si_tid, &to->si_tid);
- err |= __put_user(from->si_overrun, &to->si_overrun);
- err |= __put_user(from->si_ptr, &to->si_ptr);
+ case SIL_TIMER:
+ /* Unreached SI_TIMER is negative */
break;
- case __SI_POLL:
+ case SIL_POLL:
err |= __put_user(from->si_band, &to->si_band);
err |= __put_user(from->si_fd, &to->si_fd);
break;
- case __SI_FAULT:
+ case SIL_FAULT:
err |= __put_user(from->si_addr, &to->si_addr);
#ifdef __ARCH_SI_TRAPNO
err |= __put_user(from->si_trapno, &to->si_trapno);
@@ -2744,30 +2787,25 @@ int copy_siginfo_to_user(siginfo_t __user *to, const siginfo_t *from)
err |= __put_user(from->si_pkey, &to->si_pkey);
#endif
break;
- case __SI_CHLD:
+ case SIL_CHLD:
err |= __put_user(from->si_pid, &to->si_pid);
err |= __put_user(from->si_uid, &to->si_uid);
err |= __put_user(from->si_status, &to->si_status);
err |= __put_user(from->si_utime, &to->si_utime);
err |= __put_user(from->si_stime, &to->si_stime);
break;
- case __SI_RT: /* This is not generated by the kernel as of now. */
- case __SI_MESGQ: /* But this is */
+ case SIL_RT:
err |= __put_user(from->si_pid, &to->si_pid);
err |= __put_user(from->si_uid, &to->si_uid);
err |= __put_user(from->si_ptr, &to->si_ptr);
break;
#ifdef __ARCH_SIGSYS
- case __SI_SYS:
+ case SIL_SYS:
err |= __put_user(from->si_call_addr, &to->si_call_addr);
err |= __put_user(from->si_syscall, &to->si_syscall);
err |= __put_user(from->si_arch, &to->si_arch);
break;
#endif
- default: /* this is just in case for now ... */
- err |= __put_user(from->si_pid, &to->si_pid);
- err |= __put_user(from->si_uid, &to->si_uid);
- break;
}
return err;
}