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 newregs;
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
&newregs,
0, sizeof(newregs));
if (ret)
return ret;
if (!valid_user_regs(&newregs))
return -EINVAL;
*task_pt_regs(target) = newregs;
return 0;
}
/*
* Copy the supplied NT_PRFPREG buffer to the floating-point context,
* CONFIG_CPU_HAS_MSA variant. Buffer slots are copied to lower 64
* bits only of FP context's general register slots. Only general
* registers are copied.
*/
static int fpr_set_msa(struct task_struct *target,
unsigned int *pos, unsigned int *count,
const void **kbuf, const void __user **ubuf)
{
unsigned int i;
u64 fpr_val;
int err;
BUILD_BUG_ON(sizeof(fpr_val) != sizeof(elf_fpreg_t));
for (i = 0; i < NUM_FPU_REGS && *count > 0; i++) {
err = user_regset_copyin(pos, count, kbuf, ubuf,
&fpr_val, i * sizeof(elf_fpreg_t),
(i + 1) * sizeof(elf_fpreg_t));
if (err)
return err;
set_fpr64(&target->thread.fpu.fpr[i], 0, fpr_val);
}
return 0;
}
static int fpuregs_set(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
{
struct fpu_state_struct fpu_state = target->thread.fpu_state;
int ret;
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
&fpu_state, 0, sizeof(fpu_state));
if (ret < 0)
return ret;
fpu_kill_state(target);
target->thread.fpu_state = fpu_state;
set_using_fpu(target);
return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
sizeof(fpu_state), -1);
}
/*
* Copy the supplied NT_PRFPREG buffer to the floating-point context.
* Choose the appropriate helper for general registers, and then copy
* the FCSR register separately. Ignore the incoming FIR register
* contents though, as the register is read-only.
*
* We optimize for the case where `count % sizeof(elf_fpreg_t) == 0',
* which is supposed to have been guaranteed by the kernel before
* calling us, e.g. in `ptrace_regset'. We enforce that requirement,
* so that we can safely avoid preinitializing temporaries for
* partial register writes.
*/
static int fpr_set(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
{
const int fcr31_pos = NUM_FPU_REGS * sizeof(elf_fpreg_t);
const int fir_pos = fcr31_pos + sizeof(u32);
u32 fcr31;
int err;
BUG_ON(count % sizeof(elf_fpreg_t));
if (pos + count > sizeof(elf_fpregset_t))
return -EIO;
init_fp_ctx(target);
if (sizeof(target->thread.fpu.fpr[0]) == sizeof(elf_fpreg_t))
err = fpr_set_fpa(target, &pos, &count, &kbuf, &ubuf);
else
err = fpr_set_msa(target, &pos, &count, &kbuf, &ubuf);
if (err)
return err;
if (count > 0) {
err = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
&fcr31,
fcr31_pos, fcr31_pos + sizeof(u32));
if (err)
return err;
ptrace_setfcr31(target, fcr31);
}
if (count > 0)
err = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
fir_pos,
fir_pos + sizeof(u32));
return err;
}
/*
* update the contents of the Blackfin userspace general registers
*/
static int genregs_set(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
{
struct pt_regs *regs = task_pt_regs(target);
int ret;
/* Don't let people set SYSCFG (it's at the end of pt_regs) */
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
regs, 0, PT_SYSCFG);
if (ret < 0)
return ret;
/* This sucks ... */
target->thread.usp = regs->usp;
/* regs->retx = regs->pc; */
return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
PT_SYSCFG, -1);
}
static int genregs_set(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
{
struct pt_regs *regs = task_pt_regs(target);
int ret;
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
regs, 0, PT_SYSCFG);
if (ret < 0)
return ret;
target->thread.usp = regs->usp;
return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
PT_SYSCFG, -1);
}
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;
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®s, 0, -1);
if (ret)
return ret;
regs.sr = task_pt_regs(target)->sr;
#ifdef CONFIG_CPU_HAS_HILO
regs.dcsr = task_pt_regs(target)->dcsr;
#endif
task_thread_info(target)->tp_value = regs.tls;
*task_pt_regs(target) = regs;
return 0;
}
/*
* Copy the supplied NT_MIPS_FP_MODE buffer to the FP mode setting.
*
* We optimize for the case where `count % sizeof(int) == 0', which
* is supposed to have been guaranteed by the kernel before calling
* us, e.g. in `ptrace_regset'. We enforce that requirement, so
* that we can safely avoid preinitializing temporaries for partial
* mode writes.
*/
static int fp_mode_set(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
{
int fp_mode;
int err;
BUG_ON(count % sizeof(int));
if (pos + count > sizeof(fp_mode))
return -EIO;
err = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &fp_mode, 0,
sizeof(fp_mode));
if (err)
return err;
if (count > 0)
err = mips_set_process_fp_mode(target, fp_mode);
return err;
}
/*
* Copy the supplied 64-bit NT_MIPS_DSP buffer to the DSP context.
*/
static int dsp64_set(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
{
unsigned int start, num_regs, i;
u64 dspregs[NUM_DSP_REGS + 1];
int err;
BUG_ON(count % sizeof(u64));
if (!cpu_has_dsp)
return -EIO;
start = pos / sizeof(u64);
num_regs = count / sizeof(u64);
if (start + num_regs > NUM_DSP_REGS + 1)
return -EIO;
err = user_regset_copyin(&pos, &count, &kbuf, &ubuf, dspregs, 0,
sizeof(dspregs));
if (err)
return err;
for (i = start; i < num_regs; i++)
switch (i) {
case 0 ... NUM_DSP_REGS - 1:
target->thread.dsp.dspr[i] = dspregs[i];
break;
case NUM_DSP_REGS:
target->thread.dsp.dspcontrol = dspregs[i];
break;
}
return 0;
}
static int regs_set(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
{
int r;
int ret;
struct user_regs_struct regs;
long *reg;
/* build user regs in buffer */
for (reg = (long *)®s, r = 0; r < ARRAY_SIZE(register_offset); r++)
*reg++ = h8300_get_reg(target, r);
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
®s, 0, sizeof(regs));
if (ret)
return ret;
/* write back to pt_regs */
for (reg = (long *)®s, r = 0; r < ARRAY_SIZE(register_offset); r++)
h8300_put_reg(target, r, *reg++);
return 0;
}