Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / sparc / kernel / sigutil_32.c

diff --git a/kernel/arch/sparc/kernel/sigutil_32.c b/kernel/arch/sparc/kernel/sigutil_32.c
new file mode 100644 (file)
index 0000000..0f6eebe
--- /dev/null
+++ b/kernel/arch/sparc/kernel/sigutil_32.c
@@ -0,0 +1,121 @@
+#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 <asm/switch_to.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;
+
+}