[MIPS] Au1xx0: fix prom_getenv() to handle YAMON style environment

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / mips / kernel / signal_n32.c

diff --git a/arch/mips/kernel/signal_n32.c b/arch/mips/kernel/signal_n32.c
index ec61b2670ba6e292abc3a25d410ab383958ffde0..477c5334ec1b459eefb010c9ef5918ca1358b47b 100644 (file)
--- a/arch/mips/kernel/signal_n32.c
+++ b/arch/mips/kernel/signal_n32.c
@@ -48,6 +48,8 @@
 #define __NR_N32_rt_sigreturn          6211
 #define __NR_N32_restart_syscall       6214
 
+#define DEBUG_SIG 0
+
 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
 
 /* IRIX compatible stack_t  */
@@ -79,16 +81,50 @@ 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;
+       compat_sigset_t 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)
 {
-       struct rt_sigframe_n32 *frame;
+       struct rt_sigframe_n32 __user *frame;
        sigset_t set;
        stack_t st;
        s32 sp;
 
-       frame = (struct rt_sigframe_n32 *) regs.regs[29];
+       frame = (struct rt_sigframe_n32 __user *) regs.regs[29];
        if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
                goto badframe;
        if (__copy_from_user(&set, &frame->rs_uc.uc_sigmask, sizeof(set)))
@@ -106,7 +142,7 @@ _sysn32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
        /* The ucontext contains a stack32_t, so we must convert!  */
        if (__get_user(sp, &frame->rs_uc.uc_stack.ss_sp))
                goto badframe;
-       st.ss_size = (long) sp;
+       st.ss_sp = (void __user *)(long) sp;
        if (__get_user(st.ss_size, &frame->rs_uc.uc_stack.ss_size))
                goto badframe;
        if (__get_user(st.ss_flags, &frame->rs_uc.uc_stack.ss_flags))
@@ -114,7 +150,7 @@ _sysn32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
 
        /* It is more difficult to avoid calling this function than to
           call it and ignore errors.  */
-       do_sigaltstack(&st, NULL, regs.regs[29]);
+       do_sigaltstack((stack_t __user *)&st, NULL, regs.regs[29]);
 
        /*
         * Don't let your children do this ...
@@ -133,7 +169,7 @@ badframe:
 int setup_rt_frame_n32(struct k_sigaction * ka,
        struct pt_regs *regs, int signr, sigset_t *set, siginfo_t *info)
 {
-       struct rt_sigframe_n32 *frame;
+       struct rt_sigframe_n32 __user *frame;
        int err = 0;
        s32 sp;
 
@@ -184,9 +220,9 @@ int setup_rt_frame_n32(struct k_sigaction * ka,
               current->comm, current->pid,
               frame, regs->cp0_epc, regs->regs[31]);
 #endif
-       return 1;
+       return 0;
 
 give_sigsegv:
        force_sigsegv(signr, current);
-       return 0;
+       return -EFAULT;
 }