static void do_gpregs_set()

in kernel/ptrace.c [1530:1571]

• 35 lines of code
• 11 McCabe index (conditional complexity)

static void do_gpregs_set(struct unw_frame_info *info, void *arg)
{
	struct regset_getset *dst = arg;

	if (unw_unwind_to_user(info) < 0)
		return;

	if (!dst->count)
		return;
	/* Skip r0 */
	if (dst->pos < ELF_GR_OFFSET(1)) {
		dst->ret = user_regset_copyin_ignore(&dst->pos, &dst->count,
						       &dst->u.set.kbuf,
						       &dst->u.set.ubuf,
						       0, ELF_GR_OFFSET(1));
		if (dst->ret)
			return;
	}

	while (dst->count && dst->pos < ELF_AR_END_OFFSET) {
		unsigned int n, from, to;
		elf_greg_t tmp[16];

		from = dst->pos;
		to = from + sizeof(tmp);
		if (to > ELF_AR_END_OFFSET)
			to = ELF_AR_END_OFFSET;
		/* get up to 16 values */
		dst->ret = user_regset_copyin(&dst->pos, &dst->count,
				&dst->u.set.kbuf, &dst->u.set.ubuf, tmp,
				from, to);
		if (dst->ret)
			return;
		/* now copy them into registers */
		for (n = 0; from < dst->pos; from += sizeof(elf_greg_t), n++)
			if (access_elf_reg(dst->target, info, from,
						&tmp[n], 1) < 0) {
				dst->ret = -EIO;
				return;
			}
	}
}