powerpc: Update for VSX core file and ptrace

This correctly hooks the VSX dump into Roland McGrath core file
infrastructure.  It adds the VSX dump information as an additional elf
note in the core file (after talking more to the tool chain/gdb guys).
This also ensures the formats are consistent between signals, ptrace
and core files.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 13 insertions, 8 deletions

diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index 4e203a89e189..8feb93e7890c 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -368,13 +368,15 @@ static int vsr_get(struct task_struct *target, const struct user_regset *regset,
                    unsigned int pos, unsigned int count,
                    void *kbuf, void __user *ubuf)
 {
-        int ret;
+        double buf[32];
+        int ret, i;
 
         flush_vsx_to_thread(target);
 
+        for (i = 0; i < 32 ; i++)
+                buf[i] = current->thread.fpr[i][TS_VSRLOWOFFSET];
         ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
-                                  target->thread.fpr, 0,
-                                  32 * sizeof(vector128));
+                                  buf, 0, 32 * sizeof(double));
 
         return ret;
 }
@@ -383,13 +385,16 @@ static int vsr_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;
+        double buf[32];
+        int ret,i;
 
         flush_vsx_to_thread(target);
 
         ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
-                                 target->thread.fpr, 0,
-                                 32 * sizeof(vector128));
+                                 buf, 0, 32 * sizeof(double));
+        for (i = 0; i < 32 ; i++)
+                current->thread.fpr[i][TS_VSRLOWOFFSET] = buf[i];
+
 
         return ret;
 }
@@ -499,8 +504,8 @@ static const struct user_regset native_regsets[] = {
 #endif
 #ifdef CONFIG_VSX
         [REGSET_VSX] = {
-                .n = 32,
-                .size = sizeof(vector128), .align = sizeof(vector128),
+                .core_note_type = NT_PPC_VSX, .n = 32,
+                .size = sizeof(double), .align = sizeof(double),
                 .active = vsr_active, .get = vsr_get, .set = vsr_set
         },
 #endif