Ejemplo n.º 1
0
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;
}
Ejemplo n.º 2
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;
}
Ejemplo n.º 3
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);
}
Ejemplo n.º 4
0
/*
 * 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;
}
Ejemplo n.º 5
0
/*
 * 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);
}
Ejemplo n.º 6
0
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);
}
Ejemplo n.º 7
0
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, &regs, 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;
}
Ejemplo n.º 8
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;
}
Ejemplo n.º 9
0
/*
 * 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;
}
Ejemplo n.º 10
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 *)&regs, r = 0; r < ARRAY_SIZE(register_offset); r++)
		*reg++ = h8300_get_reg(target, r);

	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
				 &regs, 0, sizeof(regs));
	if (ret)
		return ret;

	/* write back to pt_regs */
	for (reg = (long *)&regs, r = 0; r < ARRAY_SIZE(register_offset); r++)
		h8300_put_reg(target, r, *reg++);
	return 0;
}