[PATCH v4 28/41] powerpc/ptrace-view: Use pt_regs values instead of thread_struct based one.

[Aneesh Kumar K.V]

We will remove thread.amr/iamr/uamor in a later patch

Signed-off-by: Aneesh Kumar K.V <aneesh.ku...@linux.ibm.com>
---
 arch/powerpc/kernel/ptrace/ptrace-view.c | 23 +++++++++++++++++------
 1 file changed, 17 insertions(+), 6 deletions(-)

diff --git a/arch/powerpc/kernel/ptrace/ptrace-view.c 
b/arch/powerpc/kernel/ptrace/ptrace-view.c
index caeb5822a8f4..878764d0ee4c 100644
--- a/arch/powerpc/kernel/ptrace/ptrace-view.c
+++ b/arch/powerpc/kernel/ptrace/ptrace-view.c
@@ -488,14 +488,25 @@ static int pkey_active(struct task_struct *target, const 
struct user_regset *reg
 static int pkey_get(struct task_struct *target, const struct user_regset 
*regset,
                    unsigned int pos, unsigned int count, void *kbuf, void 
__user *ubuf)
 {
-       BUILD_BUG_ON(TSO(amr) + sizeof(unsigned long) != TSO(iamr));
-       BUILD_BUG_ON(TSO(iamr) + sizeof(unsigned long) != TSO(uamor));
+       int ret;
 
        if (!arch_pkeys_enabled())
                return -ENODEV;
 
-       return user_regset_copyout(&pos, &count, &kbuf, &ubuf, 
&target->thread.amr,
-                                  0, ELF_NPKEY * sizeof(unsigned long));
+       ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, 
&target->thread.regs->kuap,
+                                 0, 1 * sizeof(unsigned long));
+       if (ret)
+               goto err_out;
+
+       ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, 
&target->thread.regs->kuep,
+                                 1 * sizeof(unsigned long), 2 * 
sizeof(unsigned long));
+       if (ret)
+               goto err_out;
+
+       ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &default_uamor,
+                                 2 * sizeof(unsigned long), 3 * 
sizeof(unsigned long));
+err_out:
+       return ret;
 }
 
 static int pkey_set(struct task_struct *target, const struct user_regset 
*regset,
@@ -518,8 +529,8 @@ static int pkey_set(struct task_struct *target, const 
struct user_regset *regset
                return ret;
 
        /* UAMOR determines which bits of the AMR can be set from userspace. */
-       target->thread.amr = (new_amr & target->thread.uamor) |
-                            (target->thread.amr & ~target->thread.uamor);
+       target->thread.regs->kuap = (new_amr & default_uamor) |
+               (target->thread.regs->kuap & ~default_uamor);
 
        return 0;
 }
-- 
2.26.2