powerpc/ptrace: Adapt gpr32_get, gpr32_set functions for transaction

This patch splits gpr32_get, gpr32_set functions to accommodate
in transaction ptrace requests implemented in patches later in
the series.

Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index 9c0e405..83cd0a1 100644 (file)
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -907,24 +907,35 @@ static const struct user_regset_view user_ppc_native_view = {
 #ifdef CONFIG_PPC64
 #include <linux/compat.h>
 
-static int gpr32_get(struct task_struct *target,
+static int gpr32_get_common(struct task_struct *target,
                     const struct user_regset *regset,
                     unsigned int pos, unsigned int count,
-                    void *kbuf, void __user *ubuf)
+                           void *kbuf, void __user *ubuf, bool tm_active)
 {
        const unsigned long *regs = &target->thread.regs->gpr[0];
+       const unsigned long *ckpt_regs;
        compat_ulong_t *k = kbuf;
        compat_ulong_t __user *u = ubuf;
        compat_ulong_t reg;
        int i;
 
-       if (target->thread.regs == NULL)
-               return -EIO;
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+       ckpt_regs = &target->thread.ckpt_regs.gpr[0];
+#endif
+       if (tm_active) {
+               regs = ckpt_regs;
+       } else {
+               if (target->thread.regs == NULL)
+                       return -EIO;
 
-       if (!FULL_REGS(target->thread.regs)) {
-               /* We have a partial register set.  Fill 14-31 with bogus values */
-               for (i = 14; i < 32; i++)
-                       target->thread.regs->gpr[i] = NV_REG_POISON; 
+               if (!FULL_REGS(target->thread.regs)) {
+                       /*
+                        * We have a partial register set.
+                        * Fill 14-31 with bogus values.
+                        */
+                       for (i = 14; i < 32; i++)
+                               target->thread.regs->gpr[i] = NV_REG_POISON;
+               }
        }
 
        pos /= sizeof(reg);
@@ -964,20 +975,31 @@ static int gpr32_get(struct task_struct *target,
                                        PT_REGS_COUNT * sizeof(reg), -1);
 }
 
-static int gpr32_set(struct task_struct *target,
+static int gpr32_set_common(struct task_struct *target,
                     const struct user_regset *regset,
                     unsigned int pos, unsigned int count,
-                    const void *kbuf, const void __user *ubuf)
+                    const void *kbuf, const void __user *ubuf, bool tm_active)
 {
        unsigned long *regs = &target->thread.regs->gpr[0];
+       unsigned long *ckpt_regs;
        const compat_ulong_t *k = kbuf;
        const compat_ulong_t __user *u = ubuf;
        compat_ulong_t reg;
 
-       if (target->thread.regs == NULL)
-               return -EIO;
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+       ckpt_regs = &target->thread.ckpt_regs.gpr[0];
+#endif
 
-       CHECK_FULL_REGS(target->thread.regs);
+       if (tm_active) {
+               regs = ckpt_regs;
+       } else {
+               regs = &target->thread.regs->gpr[0];
+
+               if (target->thread.regs == NULL)
+                       return -EIO;
+
+               CHECK_FULL_REGS(target->thread.regs);
+       }
 
        pos /= sizeof(reg);
        count /= sizeof(reg);
@@ -1037,6 +1059,22 @@ static int gpr32_set(struct task_struct *target,
                                         (PT_TRAP + 1) * sizeof(reg), -1);
 }
 
+static int gpr32_get(struct task_struct *target,
+                    const struct user_regset *regset,
+                    unsigned int pos, unsigned int count,
+                    void *kbuf, void __user *ubuf)
+{
+       return gpr32_get_common(target, regset, pos, count, kbuf, ubuf, 0);
+}
+
+static int gpr32_set(struct task_struct *target,
+                    const struct user_regset *regset,
+                    unsigned int pos, unsigned int count,
+                    const void *kbuf, const void __user *ubuf)
+{
+       return gpr32_set_common(target, regset, pos, count, kbuf, ubuf, 0);
+}
+
 /*
  * These are the regset flavors matching the CONFIG_PPC32 native set.
  */