Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / sparc / kernel / sigutil_64.c

diff --git a/kernel/arch/sparc/kernel/sigutil_64.c b/kernel/arch/sparc/kernel/sigutil_64.c
new file mode 100644 (file)
index 0000000..387834a
--- /dev/null
+++ b/kernel/arch/sparc/kernel/sigutil_64.c
@@ -0,0 +1,95 @@
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/thread_info.h>
+#include <linux/uaccess.h>
+#include <linux/errno.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)
+{
+       unsigned long *fpregs = current_thread_info()->fpregs;
+       unsigned long fprs;
+       int err = 0;
+       
+       fprs = current_thread_info()->fpsaved[0];
+       if (fprs & FPRS_DL)
+               err |= copy_to_user(&fpu->si_float_regs[0], fpregs,
+                                   (sizeof(unsigned int) * 32));
+       if (fprs & FPRS_DU)
+               err |= copy_to_user(&fpu->si_float_regs[32], fpregs+16,
+                                   (sizeof(unsigned int) * 32));
+       err |= __put_user(current_thread_info()->xfsr[0], &fpu->si_fsr);
+       err |= __put_user(current_thread_info()->gsr[0], &fpu->si_gsr);
+       err |= __put_user(fprs, &fpu->si_fprs);
+
+       return err;
+}
+
+int restore_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
+{
+       unsigned long *fpregs = current_thread_info()->fpregs;
+       unsigned long fprs;
+       int err;
+
+       err = __get_user(fprs, &fpu->si_fprs);
+       fprs_write(0);
+       regs->tstate &= ~TSTATE_PEF;
+       if (fprs & FPRS_DL)
+               err |= copy_from_user(fpregs, &fpu->si_float_regs[0],
+                              (sizeof(unsigned int) * 32));
+       if (fprs & FPRS_DU)
+               err |= copy_from_user(fpregs+16, &fpu->si_float_regs[32],
+                              (sizeof(unsigned int) * 32));
+       err |= __get_user(current_thread_info()->xfsr[0], &fpu->si_fsr);
+       err |= __get_user(current_thread_info()->gsr[0], &fpu->si_gsr);
+       current_thread_info()->fpsaved[0] |= fprs;
+       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_window *rp = &current_thread_info()->reg_window[i];
+               unsigned long fp = current_thread_info()->rwbuf_stkptrs[i];
+
+               err |= copy_to_user(&rwin->reg_window[i], rp,
+                                   sizeof(struct reg_window));
+               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_window));
+               err |= __get_user(t->rwbuf_stkptrs[i],
+                                 &rp->rwbuf_stkptrs[i]);
+       }
+       if (err)
+               return err;
+
+       set_thread_wsaved(wsaved);
+       synchronize_user_stack();
+       if (get_thread_wsaved())
+               return -EFAULT;
+       return 0;
+}