mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-28 20:02:17 +00:00
powerpc/ptrace: Enable support for EBB registers
This patch enables support for EBB state registers related ELF core note NT_PPC_EBB based ptrace requests through PTRACE_GETREGSET, PTRACE_SETREGSET calls. This is achieved through adding one new register sets REGSET_EBB in powerpc corresponding to the ELF core note sections added in this regard. It also implements the get, set and active functions for this 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:
parent
fa439810cc
commit
cf89d4e1b1
2 changed files with 76 additions and 0 deletions
|
@ -94,6 +94,7 @@
|
|||
#define ELF_NVMX 34 /* includes all vector registers */
|
||||
#define ELF_NVSX 32 /* includes all VSX registers */
|
||||
#define ELF_NTMSPRREG 3 /* include tfhar, tfiar, texasr */
|
||||
#define ELF_NEBB 3 /* includes ebbrr, ebbhr, bescr */
|
||||
|
||||
typedef unsigned long elf_greg_t64;
|
||||
typedef elf_greg_t64 elf_gregset_t64[ELF_NGREG];
|
||||
|
|
|
@ -1760,6 +1760,70 @@ static int tar_set(struct task_struct *target,
|
|||
&target->thread.tar, 0, sizeof(u64));
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int ebb_active(struct task_struct *target,
|
||||
const struct user_regset *regset)
|
||||
{
|
||||
if (!cpu_has_feature(CPU_FTR_ARCH_207S))
|
||||
return -ENODEV;
|
||||
|
||||
if (target->thread.used_ebb)
|
||||
return regset->n;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ebb_get(struct task_struct *target,
|
||||
const struct user_regset *regset,
|
||||
unsigned int pos, unsigned int count,
|
||||
void *kbuf, void __user *ubuf)
|
||||
{
|
||||
/* Build tests */
|
||||
BUILD_BUG_ON(TSO(ebbrr) + sizeof(unsigned long) != TSO(ebbhr));
|
||||
BUILD_BUG_ON(TSO(ebbhr) + sizeof(unsigned long) != TSO(bescr));
|
||||
|
||||
if (!cpu_has_feature(CPU_FTR_ARCH_207S))
|
||||
return -ENODEV;
|
||||
|
||||
if (!target->thread.used_ebb)
|
||||
return -ENODATA;
|
||||
|
||||
return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
|
||||
&target->thread.ebbrr, 0, 3 * sizeof(unsigned long));
|
||||
}
|
||||
|
||||
static int ebb_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 = 0;
|
||||
|
||||
/* Build tests */
|
||||
BUILD_BUG_ON(TSO(ebbrr) + sizeof(unsigned long) != TSO(ebbhr));
|
||||
BUILD_BUG_ON(TSO(ebbhr) + sizeof(unsigned long) != TSO(bescr));
|
||||
|
||||
if (!cpu_has_feature(CPU_FTR_ARCH_207S))
|
||||
return -ENODEV;
|
||||
|
||||
if (target->thread.used_ebb)
|
||||
return -ENODATA;
|
||||
|
||||
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
|
||||
&target->thread.ebbrr, 0, sizeof(unsigned long));
|
||||
|
||||
if (!ret)
|
||||
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
|
||||
&target->thread.ebbhr, sizeof(unsigned long),
|
||||
2 * sizeof(unsigned long));
|
||||
|
||||
if (!ret)
|
||||
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
|
||||
&target->thread.bescr,
|
||||
2 * sizeof(unsigned long), 3 * sizeof(unsigned long));
|
||||
|
||||
return ret;
|
||||
}
|
||||
#endif
|
||||
/*
|
||||
* These are our native regset flavors.
|
||||
|
@ -1792,6 +1856,7 @@ enum powerpc_regset {
|
|||
#endif
|
||||
#ifdef CONFIG_PPC_BOOK3S_64
|
||||
REGSET_TAR, /* TAR register */
|
||||
REGSET_EBB, /* EBB registers */
|
||||
#endif
|
||||
};
|
||||
|
||||
|
@ -1887,6 +1952,11 @@ static const struct user_regset native_regsets[] = {
|
|||
.size = sizeof(u64), .align = sizeof(u64),
|
||||
.get = tar_get, .set = tar_set
|
||||
},
|
||||
[REGSET_EBB] = {
|
||||
.core_note_type = NT_PPC_EBB, .n = ELF_NEBB,
|
||||
.size = sizeof(u64), .align = sizeof(u64),
|
||||
.active = ebb_active, .get = ebb_get, .set = ebb_set
|
||||
},
|
||||
#endif
|
||||
};
|
||||
|
||||
|
@ -2173,6 +2243,11 @@ static const struct user_regset compat_regsets[] = {
|
|||
.size = sizeof(u64), .align = sizeof(u64),
|
||||
.get = tar_get, .set = tar_set
|
||||
},
|
||||
[REGSET_EBB] = {
|
||||
.core_note_type = NT_PPC_EBB, .n = ELF_NEBB,
|
||||
.size = sizeof(u64), .align = sizeof(u64),
|
||||
.active = ebb_active, .get = ebb_get, .set = ebb_set
|
||||
},
|
||||
#endif
|
||||
};
|
||||
|
||||
|
|
Loading…
Reference in a new issue