[MIPS] signals: Share even more code.

native and compat do_signal and handle_signal are identical and can easily
be unified.

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

1 files changed, 11 insertions, 107 deletions

diff --git a/arch/mips/kernel/signal32.c b/arch/mips/kernel/signal32.c
index 9f829f63024b..02062fc59f77 100644
--- a/arch/mips/kernel/signal32.c
+++ b/arch/mips/kernel/signal32.c
@@ -104,7 +104,7 @@ typedef struct compat_siginfo {
  */
 #define __NR_O32_sigreturn              4119
 #define __NR_O32_rt_sigreturn           4193
-#define __NR_O32_restart_syscall        4253
+#define __NR_O32_restart_syscall        4253
 
 /* 32-bit compatibility types */
 
@@ -598,7 +598,7 @@ badframe:
         force_sig(SIGSEGV, current);
 }
 
-int setup_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
+static int setup_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
         int signr, sigset_t *set)
 {
         struct sigframe32 __user *frame;
@@ -644,7 +644,7 @@ give_sigsegv:
         return -EFAULT;
 }
 
-int setup_rt_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
+static int setup_rt_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
         int signr, sigset_t *set, siginfo_t *info)
 {
         struct rt_sigframe32 __user *frame;
@@ -704,110 +704,14 @@ give_sigsegv:
         return -EFAULT;
 }
 
-static inline int handle_signal(unsigned long sig, siginfo_t *info,
-        struct k_sigaction *ka, sigset_t *oldset, struct pt_regs * regs)
-{
-        int ret;
-
-        switch (regs->regs[0]) {
-        case ERESTART_RESTARTBLOCK:
-        case ERESTARTNOHAND:
-                regs->regs[2] = EINTR;
-                break;
-        case ERESTARTSYS:
-                if (!(ka->sa.sa_flags & SA_RESTART)) {
-                        regs->regs[2] = EINTR;
-                        break;
-                }
-        /* fallthrough */
-        case ERESTARTNOINTR:            /* Userland will reload $v0.  */
-                regs->regs[7] = regs->regs[26];
-                regs->cp0_epc -= 8;
-        }
-
-        regs->regs[0] = 0;              /* Don't deal with this again.  */
-
-        if (ka->sa.sa_flags & SA_SIGINFO)
-                ret = current->thread.abi->setup_rt_frame(ka, regs, sig, oldset, info);
-        else
-                ret = current->thread.abi->setup_frame(ka, regs, sig, oldset);
-
-        spin_lock_irq(&current->sighand->siglock);
-        sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
-        if (!(ka->sa.sa_flags & SA_NODEFER))
-                sigaddset(&current->blocked,sig);
-        recalc_sigpending();
-        spin_unlock_irq(&current->sighand->siglock);
-
-        return ret;
-}
-
-void do_signal32(struct pt_regs *regs)
-{
-        struct k_sigaction ka;
-        sigset_t *oldset;
-        siginfo_t info;
-        int signr;
-
-        /*
-         * We want the common case to go fast, which is why we may in certain
-         * cases get here from kernel mode. Just return without doing anything
-         * if so.
-         */
-        if (!user_mode(regs))
-                return;
-
-        if (test_thread_flag(TIF_RESTORE_SIGMASK))
-                oldset = &current->saved_sigmask;
-        else
-                oldset = &current->blocked;
-
-        signr = get_signal_to_deliver(&info, &ka, regs, NULL);
-        if (signr > 0) {
-                /* Whee! Actually deliver the signal. */
-                if (handle_signal(signr, &info, &ka, oldset, regs) == 0) {
-                        /*
-                        * A signal was successfully delivered; the saved
-                        * sigmask will have been stored in the signal frame,
-                        * and will be restored by sigreturn, so we can simply
-                        * clear the TIF_RESTORE_SIGMASK flag.
-                        */
-                        if (test_thread_flag(TIF_RESTORE_SIGMASK))
-                                clear_thread_flag(TIF_RESTORE_SIGMASK);
-                }
-
-                return;
-        }
-
-        /*
-         * Who's code doesn't conform to the restartable syscall convention
-         * dies here!!!  The li instruction, a single machine instruction,
-         * must directly be followed by the syscall instruction.
-         */
-        if (regs->regs[0]) {
-                if (regs->regs[2] == ERESTARTNOHAND ||
-                    regs->regs[2] == ERESTARTSYS ||
-                    regs->regs[2] == ERESTARTNOINTR) {
-                        regs->regs[7] = regs->regs[26];
-                        regs->cp0_epc -= 8;
-                }
-                if (regs->regs[2] == ERESTART_RESTARTBLOCK) {
-                        regs->regs[2] = __NR_O32_restart_syscall;
-                        regs->regs[7] = regs->regs[26];
-                        regs->cp0_epc -= 4;
-                }
-                regs->regs[0] = 0;      /* Don't deal with this again.  */
-        }
-
-        /*
-        * If there's no signal to deliver, we just put the saved sigmask
-        * back
-        */
-        if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
-                clear_thread_flag(TIF_RESTORE_SIGMASK);
-                sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
-        }
-}
+/*
+ * o32 compatibility on 64-bit kernels, without DSP ASE
+ */
+struct mips_abi mips_abi_32 = {
+        .setup_frame    = setup_frame_32,
+        .setup_rt_frame = setup_rt_frame_32,
+        .restart        = __NR_O32_restart_syscall
+};
 
 asmlinkage int sys32_rt_sigaction(int sig, const struct sigaction32 __user *act,
                                   struct sigaction32 __user *oact,