[MIPS] N32: Fix N32 rt_sigtimedwait and rt_sigsuspend breakage.

Originally found through an oops in the Gentoo N32 userland build; patch
based on original patch by Daniel Jacobwitz.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c
index 60353f5acc48a42794bc9f5d19635a507e638176..9996b6e84585415f504de9ebab7bbcbfa742cc66 100644 (file)
--- a/arch/mips/kernel/linux32.c
+++ b/arch/mips/kernel/linux32.c
@@ -1450,25 +1450,6 @@ sys32_timer_create(u32 clock, struct sigevent32 __user *se32, timer_t __user *ti
        return sys_timer_create(clock, p, timer_id);
 }
 
-asmlinkage long
-sysn32_rt_sigtimedwait(const sigset_t __user *uthese,
-                      siginfo_t __user *uinfo,
-                      const struct compat_timespec __user *uts32,
-                      size_t sigsetsize)
-{
-       struct timespec __user *uts = NULL;
-
-       if (uts32) {
-               struct timespec ts;
-               uts = compat_alloc_user_space(sizeof(struct timespec));
-               if (get_user(ts.tv_sec, &uts32->tv_sec) ||
-                   get_user(ts.tv_nsec, &uts32->tv_nsec) ||
-                   copy_to_user (uts, &ts, sizeof (ts)))
-                       return -EFAULT;
-       }
-       return sys_rt_sigtimedwait(uthese, uinfo, uts, sigsetsize);
-}
-
 save_static_function(sys32_clone);
 __attribute_used__ noinline static int
 _sys32_clone(nabi_no_regargs struct pt_regs regs)

diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S
index bc4980cefc8bc5bd7631b6fd6b8c19fc9cc11f36..d87b5446fa135c30c6b12415e8e442f0680e630c 100644 (file)
--- a/arch/mips/kernel/scall64-n32.S
+++ b/arch/mips/kernel/scall64-n32.S
@@ -245,9 +245,9 @@ EXPORT(sysn32_call_table)
        PTR     sys_capget
        PTR     sys_capset
        PTR     sys32_rt_sigpending             /* 6125 */
-       PTR     sysn32_rt_sigtimedwait
+       PTR     compat_sys_rt_sigtimedwait
        PTR     sys_rt_sigqueueinfo
-       PTR     sys32_rt_sigsuspend
+       PTR     sysn32_rt_sigsuspend
        PTR     sys32_sigaltstack
        PTR     compat_sys_utime                /* 6130 */
        PTR     sys_mknod

diff --git a/arch/mips/kernel/signal_n32.c b/arch/mips/kernel/signal_n32.c
index 5a3776096f074f794ffe2647c7e4d0ac9bd3f38e..3e168c08a3a8841b337d4a45644c3da02754b4ef 100644 (file)
--- a/arch/mips/kernel/signal_n32.c
+++ b/arch/mips/kernel/signal_n32.c
@@ -81,6 +81,39 @@ struct rt_sigframe_n32 {
 #endif
 };
 
+extern void sigset_from_compat (sigset_t *set, compat_sigset_t *compat);
+
+save_static_function(sysn32_rt_sigsuspend);
+__attribute_used__ noinline static int
+_sysn32_rt_sigsuspend(nabi_no_regargs struct pt_regs regs)
+{
+       compat_sigset_t __user *unewset, uset;
+       size_t sigsetsize;
+       sigset_t newset;
+
+       /* XXX Don't preclude handling different sized sigset_t's.  */
+       sigsetsize = regs.regs[5];
+       if (sigsetsize != sizeof(sigset_t))
+               return -EINVAL;
+
+       unewset = (compat_sigset_t __user *) regs.regs[4];
+       if (copy_from_user(&uset, unewset, sizeof(uset)))
+               return -EFAULT;
+       sigset_from_compat (&newset, &uset);
+       sigdelsetmask(&newset, ~_BLOCKABLE);
+
+       spin_lock_irq(&current->sighand->siglock);
+       current->saved_sigmask = current->blocked;
+       current->blocked = newset;
+        recalc_sigpending();
+       spin_unlock_irq(&current->sighand->siglock);
+
+       current->state = TASK_INTERRUPTIBLE;
+       schedule();
+       set_thread_flag(TIF_RESTORE_SIGMASK);
+       return -ERESTARTNOHAND;
+}
+
 save_static_function(sysn32_rt_sigreturn);
 __attribute_used__ noinline static void
 _sysn32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)