Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff

[linux-2.6.git] / arch / mips / kernel / signal_n32.c

diff --git a/arch/mips/kernel/signal_n32.c b/arch/mips/kernel/signal_n32.c
index 3544208..477c533 100644 (file)
--- a/arch/mips/kernel/signal_n32.c
+++ b/arch/mips/kernel/signal_n32.c
@@ -15,6 +15,8 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  */
+#include <linux/cache.h>
+#include <linux/sched.h>
 #include <linux/sched.h>
 #include <linux/mm.h>
 #include <linux/smp.h>
@@ -36,6 +38,7 @@
 #include <asm/system.h>
 #include <asm/fpu.h>
 #include <asm/cpu-features.h>
+#include <asm/war.h>
 
 #include "signal-common.h"
 
@@ -45,6 +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  */
@@ -62,29 +67,64 @@ struct ucontextn32 {
        sigset_t            uc_sigmask;   /* mask last for extensibility */
 };
 
-#if PLAT_TRAMPOLINE_STUFF_LINE
-#define __tramp __attribute__((aligned(PLAT_TRAMPOLINE_STUFF_LINE)))
-#else
-#define __tramp
-#endif
-
 struct rt_sigframe_n32 {
        u32 rs_ass[4];                  /* argument save space for o32 */
-       u32 rs_code[2] __tramp;         /* signal trampoline */
-       struct siginfo rs_info __tramp;
+#if ICACHE_REFILLS_WORKAROUND_WAR
+       u32 rs_pad[2];
+#else
+       u32 rs_code[2];                 /* signal trampoline */
+#endif
+       struct siginfo rs_info;
        struct ucontextn32 rs_uc;
+#if ICACHE_REFILLS_WORKAROUND_WAR
+       u32 rs_code[8] ____cacheline_aligned;           /* signal trampoline */
+#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)))
@@ -102,7 +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))
@@ -110,7 +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 ...
@@ -126,10 +166,10 @@ badframe:
        force_sig(SIGSEGV, current);
 }
 
-void setup_rt_frame_n32(struct k_sigaction * ka,
+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;
 
@@ -137,17 +177,7 @@ void setup_rt_frame_n32(struct k_sigaction * ka,
        if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
                goto give_sigsegv;
 
-       /*
-        * Set up the return code ...
-        *
-        *         li      v0, __NR_rt_sigreturn
-        *         syscall
-        */
-       if (PLAT_TRAMPOLINE_STUFF_LINE)
-               __clear_user(frame->rs_code, PLAT_TRAMPOLINE_STUFF_LINE);
-       err |= __put_user(0x24020000 + __NR_N32_rt_sigreturn, frame->rs_code + 0);
-       err |= __put_user(0x0000000c                        , frame->rs_code + 1);
-       flush_cache_sigtramp((unsigned long) frame->rs_code);
+       install_sigtramp(frame->rs_code, __NR_N32_rt_sigreturn);
 
        /* Create siginfo.  */
        err |= copy_siginfo_to_user(&frame->rs_info, info);
@@ -190,8 +220,9 @@ void setup_rt_frame_n32(struct k_sigaction * ka,
               current->comm, current->pid,
               frame, regs->cp0_epc, regs->regs[31]);
 #endif
-       return;
+       return 0;
 
 give_sigsegv:
        force_sigsegv(signr, current);
+       return -EFAULT;
 }