diff options
| -rw-r--r-- | include/linux/regset.h | 29 | ||||
| -rw-r--r-- | kernel/regset.c | 26 |
2 files changed, 30 insertions, 25 deletions
diff --git a/include/linux/regset.h b/include/linux/regset.h index 968a032922d5..af57c1db1924 100644 --- a/include/linux/regset.h +++ b/include/linux/regset.h @@ -362,31 +362,10 @@ extern int regset_get_alloc(struct task_struct *target, unsigned int size, void **data); -/** - * copy_regset_to_user - fetch a thread's user_regset data into user memory - * @target: thread to be examined - * @view: &struct user_regset_view describing user thread machine state - * @setno: index in @view->regsets - * @offset: offset into the regset data, in bytes - * @size: amount of data to copy, in bytes - * @data: user-mode pointer to copy into - */ -static inline int copy_regset_to_user(struct task_struct *target, - const struct user_regset_view *view, - unsigned int setno, - unsigned int offset, unsigned int size, - void __user *data) -{ - const struct user_regset *regset = &view->regsets[setno]; - - if (!regset->get) - return -EOPNOTSUPP; - - if (!access_ok(data, size)) - return -EFAULT; - - return regset->get(target, regset, offset, size, NULL, data); -} +extern int copy_regset_to_user(struct task_struct *target, + const struct user_regset_view *view, + unsigned int setno, unsigned int offset, + unsigned int size, void __user *data); /** * copy_regset_from_user - store into thread's user_regset data from user memory diff --git a/kernel/regset.c b/kernel/regset.c index 6b39fa0993ec..0a610983ce43 100644 --- a/kernel/regset.c +++ b/kernel/regset.c @@ -52,3 +52,29 @@ int regset_get_alloc(struct task_struct *target, return __regset_get(target, regset, size, data); } EXPORT_SYMBOL(regset_get_alloc); + +/** + * copy_regset_to_user - fetch a thread's user_regset data into user memory + * @target: thread to be examined + * @view: &struct user_regset_view describing user thread machine state + * @setno: index in @view->regsets + * @offset: offset into the regset data, in bytes + * @size: amount of data to copy, in bytes + * @data: user-mode pointer to copy into + */ +int copy_regset_to_user(struct task_struct *target, + const struct user_regset_view *view, + unsigned int setno, + unsigned int offset, unsigned int size, + void __user *data) +{ + const struct user_regset *regset = &view->regsets[setno]; + void *buf; + int ret; + + ret = regset_get_alloc(target, regset, size, &buf); + if (ret > 0) + ret = copy_to_user(data, buf, ret) ? -EFAULT : 0; + kfree(buf); + return ret; +} |