sh: Add FPU registers to regset interface.

[linux-2.6-omap-h63xx.git] / arch / sh / kernel / ptrace_32.c

diff --git a/arch/sh/kernel/ptrace_32.c b/arch/sh/kernel/ptrace_32.c
index 0f44f2b51a60562bcd5468e341d0c7e9d5a567a3..29ca09d24ef855b54c5e6bd431a01fd83e96cd0b 100644 (file)
--- a/arch/sh/kernel/ptrace_32.c
+++ b/arch/sh/kernel/ptrace_32.c
@@ -32,6 +32,7 @@
 #include <asm/processor.h>
 #include <asm/mmu_context.h>
 #include <asm/syscalls.h>
+#include <asm/fpu.h>
 
 /*
  * This routine will get a word off of the process kernel stack.
@@ -145,6 +146,54 @@ static int genregs_set(struct task_struct *target,
        return ret;
 }
 
+#ifdef CONFIG_SH_FPU
+int fpregs_get(struct task_struct *target,
+              const struct user_regset *regset,
+              unsigned int pos, unsigned int count,
+              void *kbuf, void __user *ubuf)
+{
+       int ret;
+
+       ret = init_fpu(target);
+       if (ret)
+               return ret;
+
+       if ((boot_cpu_data.flags & CPU_HAS_FPU))
+               return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+                                          &target->thread.fpu.hard, 0, -1);
+
+       return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+                                  &target->thread.fpu.soft, 0, -1);
+}
+
+static int fpregs_set(struct task_struct *target,
+                      const struct user_regset *regset,
+                      unsigned int pos, unsigned int count,
+                      const void *kbuf, const void __user *ubuf)
+{
+       int ret;
+
+       ret = init_fpu(target);
+       if (ret)
+               return ret;
+
+       set_stopped_child_used_math(target);
+
+       if ((boot_cpu_data.flags & CPU_HAS_FPU))
+               return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+                                         &target->thread.fpu.hard, 0, -1);
+
+       return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+                                 &target->thread.fpu.soft, 0, -1);
+}
+
+static int fpregs_active(struct task_struct *target,
+                        const struct user_regset *regset)
+{
+       return tsk_used_math(target) ? regset->n : 0;
+}
+#endif
+
 #ifdef CONFIG_SH_DSP
 static int dspregs_get(struct task_struct *target,
                       const struct user_regset *regset,
@@ -194,6 +243,9 @@ static int dspregs_active(struct task_struct *target,
  */
 enum sh_regset {
        REGSET_GENERAL,
+#ifdef CONFIG_SH_FPU
+       REGSET_FPU,
+#endif
 #ifdef CONFIG_SH_DSP
        REGSET_DSP,
 #endif
@@ -214,6 +266,18 @@ static const struct user_regset sh_regsets[] = {
                .set            = genregs_set,
        },
 
+#ifdef CONFIG_SH_FPU
+       [REGSET_FPU] = {
+               .core_note_type = NT_PRFPREG,
+               .n              = sizeof(struct user_fpu_struct) / sizeof(long),
+               .size           = sizeof(long),
+               .align          = sizeof(long),
+               .get            = fpregs_get,
+               .set            = fpregs_set,
+               .active         = fpregs_active,
+       },
+#endif
+
 #ifdef CONFIG_SH_DSP
        [REGSET_DSP] = {
                .n              = sizeof(struct pt_dspregs) / sizeof(long),
@@ -304,6 +368,18 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                                             REGSET_GENERAL,
                                             0, sizeof(struct pt_regs),
                                             (const void __user *)data);
+#ifdef CONFIG_SH_FPU
+       case PTRACE_GETFPREGS:
+               return copy_regset_to_user(child, &user_sh_native_view,
+                                          REGSET_FPU,
+                                          0, sizeof(struct user_fpu_struct),
+                                          (void __user *)data);
+       case PTRACE_SETFPREGS:
+               return copy_regset_from_user(child, &user_sh_native_view,
+                                            REGSET_FPU,
+                                            0, sizeof(struct user_fpu_struct),
+                                            (const void __user *)data);
+#endif
 #ifdef CONFIG_SH_DSP
        case PTRACE_GETDSPREGS:
                return copy_regset_to_user(child, &user_sh_native_view,