1 files changed, 120 insertions, 0 deletions

diff --git a/arch/sparc/kernel/sigutil_32.c b/arch/sparc/kernel/sigutil_32.c
new file mode 100644
index 000000000000..35c7897b009a
--- /dev/null
+++ b/arch/sparc/kernel/sigutil_32.c
@@ -0,0 +1,120 @@
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/thread_info.h>
+#include <linux/uaccess.h>
+#include <linux/sched.h>
+
+#include <asm/sigcontext.h>
+#include <asm/fpumacro.h>
+#include <asm/ptrace.h>
+
+#include "sigutil.h"
+
+int save_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
+{
+        int err = 0;
+#ifdef CONFIG_SMP
+        if (test_tsk_thread_flag(current, TIF_USEDFPU)) {
+                put_psr(get_psr() | PSR_EF);
+                fpsave(&current->thread.float_regs[0], &current->thread.fsr,
+                       &current->thread.fpqueue[0], &current->thread.fpqdepth);
+                regs->psr &= ~(PSR_EF);
+                clear_tsk_thread_flag(current, TIF_USEDFPU);
+        }
+#else
+        if (current == last_task_used_math) {
+                put_psr(get_psr() | PSR_EF);
+                fpsave(&current->thread.float_regs[0], &current->thread.fsr,
+                       &current->thread.fpqueue[0], &current->thread.fpqdepth);
+                last_task_used_math = NULL;
+                regs->psr &= ~(PSR_EF);
+        }
+#endif
+        err |= __copy_to_user(&fpu->si_float_regs[0],
+                              &current->thread.float_regs[0],
+                              (sizeof(unsigned long) * 32));
+        err |= __put_user(current->thread.fsr, &fpu->si_fsr);
+        err |= __put_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
+        if (current->thread.fpqdepth != 0)
+                err |= __copy_to_user(&fpu->si_fpqueue[0],
+                                      &current->thread.fpqueue[0],
+                                      ((sizeof(unsigned long) +
+                                      (sizeof(unsigned long *)))*16));
+        clear_used_math();
+        return err;
+}
+
+int restore_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
+{
+        int err;
+#ifdef CONFIG_SMP
+        if (test_tsk_thread_flag(current, TIF_USEDFPU))
+                regs->psr &= ~PSR_EF;
+#else
+        if (current == last_task_used_math) {
+                last_task_used_math = NULL;
+                regs->psr &= ~PSR_EF;
+        }
+#endif
+        set_used_math();
+        clear_tsk_thread_flag(current, TIF_USEDFPU);
+
+        if (!access_ok(VERIFY_READ, fpu, sizeof(*fpu)))
+                return -EFAULT;
+
+        err = __copy_from_user(&current->thread.float_regs[0], &fpu->si_float_regs[0],
+                               (sizeof(unsigned long) * 32));
+        err |= __get_user(current->thread.fsr, &fpu->si_fsr);
+        err |= __get_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
+        if (current->thread.fpqdepth != 0)
+                err |= __copy_from_user(&current->thread.fpqueue[0],
+                                        &fpu->si_fpqueue[0],
+                                        ((sizeof(unsigned long) +
+                                        (sizeof(unsigned long *)))*16));
+        return err;
+}
+
+int save_rwin_state(int wsaved, __siginfo_rwin_t __user *rwin)
+{
+        int i, err = __put_user(wsaved, &rwin->wsaved);
+
+        for (i = 0; i < wsaved; i++) {
+                struct reg_window32 *rp;
+                unsigned long fp;
+
+                rp = &current_thread_info()->reg_window[i];
+                fp = current_thread_info()->rwbuf_stkptrs[i];
+                err |= copy_to_user(&rwin->reg_window[i], rp,
+                                    sizeof(struct reg_window32));
+                err |= __put_user(fp, &rwin->rwbuf_stkptrs[i]);
+        }
+        return err;
+}
+
+int restore_rwin_state(__siginfo_rwin_t __user *rp)
+{
+        struct thread_info *t = current_thread_info();
+        int i, wsaved, err;
+
+        __get_user(wsaved, &rp->wsaved);
+        if (wsaved > NSWINS)
+                return -EFAULT;
+
+        err = 0;
+        for (i = 0; i < wsaved; i++) {
+                err |= copy_from_user(&t->reg_window[i],
+                                      &rp->reg_window[i],
+                                      sizeof(struct reg_window32));
+                err |= __get_user(t->rwbuf_stkptrs[i],
+                                  &rp->rwbuf_stkptrs[i]);
+        }
+        if (err)
+                return err;
+
+        t->w_saved = wsaved;
+        synchronize_user_stack();
+        if (t->w_saved)
+                return -EFAULT;
+        return 0;
+
+}