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powerpc/ptrace: Enable support for NT_PPPC_TAR, NT_PPC_PPR, NT_PPC_DSCR

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This patch enables support for running TAR, PPR, DSCR registers
related ELF core notes NT_PPPC_TAR, NT_PPC_PPR, NT_PPC_DSCR based
ptrace requests through PTRACE_GETREGSET, PTRACE_SETREGSET calls.
This is achieved through adding three new register sets REGSET_TAR,
REGSET_PPR, REGSET_DSCR in powerpc corresponding to the ELF core
note sections added in this regad. It implements the get, set and
active functions for all these new register sets added.

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 10:57:42 +08:00 committed by Michael Ellerman
parent c45dc9003a
commit fa439810cc
1 changed files with 117 additions and 0 deletions
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117
arch/powerpc/kernel/ptrace.c
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@ -1689,6 +1689,78 @@ static int tm_dscr_set(struct task_struct *target,
}
#endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
#ifdef CONFIG_PPC64
static int ppr_get(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
void *kbuf, void __user *ubuf)
{
int ret;
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
&target->thread.ppr, 0, sizeof(u64));
return ret;
}
static int ppr_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 = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
&target->thread.ppr, 0, sizeof(u64));
return ret;
}
static int dscr_get(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
void *kbuf, void __user *ubuf)
{
int ret;
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
&target->thread.dscr, 0, sizeof(u64));
return ret;
}
static int dscr_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 = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
&target->thread.dscr, 0, sizeof(u64));
return ret;
}
#endif
#ifdef CONFIG_PPC_BOOK3S_64
static int tar_get(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
void *kbuf, void __user *ubuf)
{
int ret;
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
&target->thread.tar, 0, sizeof(u64));
return ret;
}
static int tar_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 = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
&target->thread.tar, 0, sizeof(u64));
return ret;
}
#endif
/*
* These are our native regset flavors.
*/
@ -1714,6 +1786,13 @@ enum powerpc_regset {
REGSET_TM_CPPR, /* TM checkpointed PPR register */
REGSET_TM_CDSCR, /* TM checkpointed DSCR register */
#endif
#ifdef CONFIG_PPC64
REGSET_PPR, /* PPR register */
REGSET_DSCR, /* DSCR register */
#endif
#ifdef CONFIG_PPC_BOOK3S_64
REGSET_TAR, /* TAR register */
#endif
};
static const struct user_regset native_regsets[] = {
@ -1790,6 +1869,25 @@ static const struct user_regset native_regsets[] = {
.active = tm_dscr_active, .get = tm_dscr_get, .set = tm_dscr_set
},
#endif
#ifdef CONFIG_PPC64
[REGSET_PPR] = {
.core_note_type = NT_PPC_PPR, .n = 1,
.size = sizeof(u64), .align = sizeof(u64),
.get = ppr_get, .set = ppr_set
},
[REGSET_DSCR] = {
.core_note_type = NT_PPC_DSCR, .n = 1,
.size = sizeof(u64), .align = sizeof(u64),
.get = dscr_get, .set = dscr_set
},
#endif
#ifdef CONFIG_PPC_BOOK3S_64
[REGSET_TAR] = {
.core_note_type = NT_PPC_TAR, .n = 1,
.size = sizeof(u64), .align = sizeof(u64),
.get = tar_get, .set = tar_set
},
#endif
};
static const struct user_regset_view user_ppc_native_view = {
@ -2057,6 +2155,25 @@ static const struct user_regset compat_regsets[] = {
.active = tm_dscr_active, .get = tm_dscr_get, .set = tm_dscr_set
},
#endif
#ifdef CONFIG_PPC64
[REGSET_PPR] = {
.core_note_type = NT_PPC_PPR, .n = 1,
.size = sizeof(u64), .align = sizeof(u64),
.get = ppr_get, .set = ppr_set
},
[REGSET_DSCR] = {
.core_note_type = NT_PPC_DSCR, .n = 1,
.size = sizeof(u64), .align = sizeof(u64),
.get = dscr_get, .set = dscr_set
},
#endif
#ifdef CONFIG_PPC_BOOK3S_64
[REGSET_TAR] = {
.core_note_type = NT_PPC_TAR, .n = 1,
.size = sizeof(u64), .align = sizeof(u64),
.get = tar_get, .set = tar_set
},
#endif
};
static const struct user_regset_view user_ppc_compat_view = {