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c6x/ptrace: Remove useless PTRACE_SETREGSET implementation

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commit fb411b837b upstream.

gpr_set won't work correctly and can never have been tested, and the
correct behaviour is not clear due to the endianness-dependent task
layout.

So, just remove it.  The core code will now return -EOPNOTSUPPORT when
trying to set NT_PRSTATUS on this architecture until/unless a correct
implementation is supplied.

Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dave Martin 2017-03-27 15:10:53 +01:00 committed by Greg Kroah-Hartman
parent 800791e7e0
commit 6e174bbd06
1 changed files with 0 additions and 41 deletions
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41
arch/c6x/kernel/ptrace.c
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@ -69,46 +69,6 @@ static int gpr_get(struct task_struct *target,
0, sizeof(*regs));
}
static int gpr_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;
struct pt_regs *regs = task_pt_regs(target);
/* Don't copyin TSR or CSR */
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
&regs,
0, PT_TSR * sizeof(long));
if (ret)
return ret;
ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
PT_TSR * sizeof(long),
(PT_TSR + 1) * sizeof(long));
if (ret)
return ret;
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
&regs,
(PT_TSR + 1) * sizeof(long),
PT_CSR * sizeof(long));
if (ret)
return ret;
ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
PT_CSR * sizeof(long),
(PT_CSR + 1) * sizeof(long));
if (ret)
return ret;
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
&regs,
(PT_CSR + 1) * sizeof(long), -1);
return ret;
}
enum c6x_regset {
REGSET_GPR,
};
@ -120,7 +80,6 @@ static const struct user_regset c6x_regsets[] = {
.size = sizeof(u32),
.align = sizeof(u32),
.get = gpr_get,
.set = gpr_set
},
};