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arm: switch to ->regset_get()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2020-06-16 01:10:27 -04:00
parent 3399d90ce6
commit 3598e9f096
1 changed files with 12 additions and 40 deletions
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52
arch/arm/kernel/ptrace.c
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@ -569,14 +569,9 @@ static int ptrace_sethbpregs(struct task_struct *tsk, long num,
static int gpr_get(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
void *kbuf, void __user *ubuf)
struct membuf to)
{
struct pt_regs *regs = task_pt_regs(target);
return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
regs,
0, sizeof(*regs));
return membuf_write(&to, task_pt_regs(target), sizeof(struct pt_regs));
}
static int gpr_set(struct task_struct *target,
@ -602,12 +597,10 @@ static int gpr_set(struct task_struct *target,
static int fpa_get(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
void *kbuf, void __user *ubuf)
struct membuf to)
{
return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
&task_thread_info(target)->fpstate,
0, sizeof(struct user_fp));
return membuf_write(&to, &task_thread_info(target)->fpstate,
sizeof(struct user_fp));
}
static int fpa_set(struct task_struct *target,
@ -642,41 +635,20 @@ static int fpa_set(struct task_struct *target,
* vfp_set() ignores this chunk
*
* 1 word for the FPSCR
*
* The bounds-checking logic built into user_regset_copyout and friends
* means that we can make a simple sequence of calls to map the relevant data
* to/from the specified slice of the user regset structure.
*/
static int vfp_get(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
void *kbuf, void __user *ubuf)
struct membuf to)
{
int ret;
struct thread_info *thread = task_thread_info(target);
struct vfp_hard_struct const *vfp = &thread->vfpstate.hard;
const size_t user_fpregs_offset = offsetof(struct user_vfp, fpregs);
const size_t user_fpscr_offset = offsetof(struct user_vfp, fpscr);
vfp_sync_hwstate(thread);
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
&vfp->fpregs,
user_fpregs_offset,
user_fpregs_offset + sizeof(vfp->fpregs));
if (ret)
return ret;
ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
user_fpregs_offset + sizeof(vfp->fpregs),
user_fpscr_offset);
if (ret)
return ret;
return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
&vfp->fpscr,
user_fpscr_offset,
user_fpscr_offset + sizeof(vfp->fpscr));
membuf_write(&to, vfp->fpregs, sizeof(vfp->fpregs));
membuf_zero(&to, user_fpscr_offset - sizeof(vfp->fpregs));
return membuf_store(&to, vfp->fpscr);
}
/*
@ -739,7 +711,7 @@ static const struct user_regset arm_regsets[] = {
.n = ELF_NGREG,
.size = sizeof(u32),
.align = sizeof(u32),
.get = gpr_get,
.regset_get = gpr_get,
.set = gpr_set
},
[REGSET_FPR] = {
@ -751,7 +723,7 @@ static const struct user_regset arm_regsets[] = {
.n = sizeof(struct user_fp) / sizeof(u32),
.size = sizeof(u32),
.align = sizeof(u32),
.get = fpa_get,
.regset_get = fpa_get,
.set = fpa_set
},
#ifdef CONFIG_VFP
@ -764,7 +736,7 @@ static const struct user_regset arm_regsets[] = {
.n = ARM_VFPREGS_SIZE / sizeof(u32),
.size = sizeof(u32),
.align = sizeof(u32),
.get = vfp_get,
.regset_get = vfp_get,
.set = vfp_set
},
#endif /* CONFIG_VFP */