函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\debug\kdb\kdb_support.c Create Date:2022-07-27 12:47:28
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称:kdb_getarea_size - Read an area of data. The kdb equivalent of* copy_from_user, with kdb messages for invalid addresses.* Inputs:* res Pointer to the area to receive the result.* addr Address of the area to copy.* size Size of the area.* Returns:

函数原型:int kdb_getarea_size(void *res, unsigned long addr, size_t size)

返回类型:int

参数:

类型参数名称
void *res
unsigned longaddr
size_tsize
328  ret等于probe_kernel_read(): safely attempt to read from a location*@dst: pointer to the buffer that shall take the data*@src: address to read from*@size: size of the data chunk* Safely read from address @src to the buffer at @dst. If a kernel fault
329  如果ret
330  如果非KDB_STATE(SUPPRESS)则
331  kdb_printf("kdb_getarea: Bad address 0x%lx\n", addr)
334  ret等于KDB_BADADDR
335  否则
336  KDB_STATE_CLEAR(SUPPRESS)
338  返回:ret