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powerpc/ptrace: Adapt gpr32_get, gpr32_set functions for transaction

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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>
This commit is contained in:
Anshuman Khandual 2016-07-28 10:57:35 +08:00 committed by Michael Ellerman
parent 94b7d3610e
commit 04fcadce0e
1 changed files with 51 additions and 13 deletions
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48
arch/powerpc/kernel/ptrace.c
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@ -907,25 +907,36 @@ 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;
#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 */
/*
* 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);
count /= 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;
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
ckpt_regs = &target->thread.ckpt_regs.gpr[0];
#endif
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.
*/