函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:arch\x86\kernel\cpu\mtrr\if.c Create Date:2022-07-27 09:05:55
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：mtrr_ioctl

函数原型：static long mtrr_ioctl(struct file *file, unsigned int cmd, unsigned long __arg)

返回类型：long

参数：

类型参数名称
struct file *file
unsigned intcmd
unsigned long__arg
160  err等于0
166  __user乘arg等于__arg
168  memset( & gentry, 0, gentry的长度)
171  当:cmd恒等于These are the various ioctls
172  当:cmd恒等于MTRRIOC_SET_ENTRY
173  当:cmd恒等于MTRRIOC_DEL_ENTRY
174  当:cmd恒等于MTRRIOC_KILL_ENTRY
175  当:cmd恒等于MTRRIOC_ADD_PAGE_ENTRY
176  当:cmd恒等于MTRRIOC_SET_PAGE_ENTRY
177  当:cmd恒等于MTRRIOC_DEL_PAGE_ENTRY
178  当:cmd恒等于MTRRIOC_KILL_PAGE_ENTRY
179  如果copy_from_user( & sentry, arg, sentry的长度)则返回:负EFAULT
181  退出
182  当:cmd恒等于MTRRIOC_GET_ENTRY
183  当:cmd恒等于MTRRIOC_GET_PAGE_ENTRY
184  如果copy_from_user( & gentry, arg, gentry的长度)则返回:负EFAULT
186  退出
188  当:cmd恒等于MTRRIOC32_ADD_ENTRY
189  当:cmd恒等于MTRRIOC32_SET_ENTRY
190  当:cmd恒等于MTRRIOC32_DEL_ENTRY
191  当:cmd恒等于MTRRIOC32_KILL_ENTRY
192  当:cmd恒等于MTRRIOC32_ADD_PAGE_ENTRY
193  当:cmd恒等于MTRRIOC32_SET_PAGE_ENTRY
194  当:cmd恒等于MTRRIOC32_DEL_PAGE_ENTRY
195  当:cmd恒等于MTRRIOC32_KILL_PAGE_ENTRY
196  __user乘s32
198  s32等于__arg
199  err等于Careful: we have to cast the result to the type of the pointer* for sign reasons(Base address , & Base address )
200  err或等于Careful: we have to cast the result to the type of the pointer* for sign reasons(Size of region , & Size of region )
201  err或等于Careful: we have to cast the result to the type of the pointer* for sign reasons(Type of region , & Type of region )
202  如果err则返回:err
204  退出
206  当:cmd恒等于MTRRIOC32_GET_ENTRY
207  当:cmd恒等于MTRRIOC32_GET_PAGE_ENTRY
208  __user乘g32
210  g32等于__arg
211  err等于Careful: we have to cast the result to the type of the pointer* for sign reasons( Register number , & Register number )
212  err或等于Careful: we have to cast the result to the type of the pointer* for sign reasons( Base address , & Base address )
213  err或等于Careful: we have to cast the result to the type of the pointer* for sign reasons( Size of region , & Size of region )
214  err或等于Careful: we have to cast the result to the type of the pointer* for sign reasons( Type of region , & Type of region )
215  如果err则返回:err
217  退出
223  默认
224  返回:负ENOTTY
225  当:cmd恒等于These are the various ioctls
227  当:cmd恒等于MTRRIOC32_ADD_ENTRY
229  如果非操作权限检查则返回:负EPERM
231  err等于mtrr_file_add(Base address , Size of region , Type of region , true, file, 0)
234  退出
235  当:cmd恒等于MTRRIOC_SET_ENTRY
237  当:cmd恒等于MTRRIOC32_SET_ENTRY
239  如果非操作权限检查则返回:负EPERM
241  err等于mtrr_add - Add a memory type region*@base: Physical base address of region*@size: Physical size of region*@type: Type of MTRR desired*@increment: If this is true do usage counting on the region* Memory type region registers control the caching on newer
242  退出
243  当:cmd恒等于MTRRIOC_DEL_ENTRY
245  当:cmd恒等于MTRRIOC32_DEL_ENTRY
247  如果非操作权限检查则返回:负EPERM
249  err等于mtrr_file_del(Base address , Size of region , file, 0)
250  退出
251  当:cmd恒等于MTRRIOC_KILL_ENTRY
253  当:cmd恒等于MTRRIOC32_KILL_ENTRY
255  如果非操作权限检查则返回:负EPERM
257  err等于mtrr_del - delete a memory type region*@reg: Register returned by mtrr_add*@base: Physical base address*@size: Size of region* If register is supplied then base and size are ignored. This is* how drivers should call it.* Releases an MTRR region
258  退出
259  当:cmd恒等于MTRRIOC_GET_ENTRY
261  当:cmd恒等于MTRRIOC32_GET_ENTRY
263  如果 Register number 大于等于num_var_ranges则返回:负EINVAL
265  get( Register number , & base, & size, & type)
268  如果base加size减1大于等于1UL左移8乘 Size of region 的长度减PAGE_SHIFT determines the page size 位或size大于等于1UL左移8乘 Size of region 的长度减PAGE_SHIFT determines the page size 位则 Base address 等于 Size of region 等于 Type of region 等于0
271  否则
277  退出
278  当:cmd恒等于MTRRIOC_ADD_PAGE_ENTRY
280  当:cmd恒等于MTRRIOC32_ADD_PAGE_ENTRY
282  如果非操作权限检查则返回:负EPERM
284  err等于mtrr_file_add(Base address , Size of region , Type of region , true, file, 1)
287  退出
288  当:cmd恒等于MTRRIOC_SET_PAGE_ENTRY
290  当:cmd恒等于MTRRIOC32_SET_PAGE_ENTRY
292  如果非操作权限检查则返回:负EPERM
294  err等于mtrr_add_page - Add a memory type region*@base: Physical base address of region in pages (in units of 4 kB!)*@size: Physical size of region in pages (4 kB)*@type: Type of MTRR desired*@increment: If this is true do usage counting on the region* Memory
296  退出
297  当:cmd恒等于MTRRIOC_DEL_PAGE_ENTRY
299  当:cmd恒等于MTRRIOC32_DEL_PAGE_ENTRY
301  如果非操作权限检查则返回:负EPERM
303  err等于mtrr_file_del(Base address , Size of region , file, 1)
304  退出
305  当:cmd恒等于MTRRIOC_KILL_PAGE_ENTRY
307  当:cmd恒等于MTRRIOC32_KILL_PAGE_ENTRY
309  如果非操作权限检查则返回:负EPERM
311  err等于mtrr_del_page - delete a memory type region*@reg: Register returned by mtrr_add*@base: Physical base address*@size: Size of region* If register is supplied then base and size are ignored. This is* how drivers should call it.* Releases an MTRR region
312  退出
313  当:cmd恒等于MTRRIOC_GET_PAGE_ENTRY
315  当:cmd恒等于MTRRIOC32_GET_PAGE_ENTRY
317  如果 Register number 大于等于num_var_ranges则返回:负EINVAL
319  get( Register number , & base, & size, & type)
321  如果size不等于size则 Base address 等于 Size of region 等于 Type of region 等于0
323  否则
328  退出
331  如果err则返回:err
335  当:cmd恒等于MTRRIOC_GET_ENTRY
336  当:cmd恒等于MTRRIOC_GET_PAGE_ENTRY
337  如果copy_to_user(arg, & gentry, gentry的长度)则err等于负EFAULT
339  退出
341  当:cmd恒等于MTRRIOC32_GET_ENTRY
342  当:cmd恒等于MTRRIOC32_GET_PAGE_ENTRY
343  __user乘g32
345  g32等于__arg
346  err等于put_user - Write a simple value into user space( Base address , & Base address )
347  err或等于put_user - Write a simple value into user space( Size of region , & Size of region )
348  err或等于put_user - Write a simple value into user space( Register number , & Register number )
349  err或等于put_user - Write a simple value into user space( Type of region , & Type of region )
350  退出
354  返回:err