Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\debug\kdb\kdb_support.c Create Date:2022-07-28 11:43:06
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Annotation kernel can get tool activityDownload SCCTChinese

Name: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:

Proto:int kdb_getarea_size(void *res, unsigned long addr, size_t size)

Type:int

Parameter:

TypeParameterName
void *res
unsigned longaddr
size_tsize
328  ret = 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  If ret Then
330  If Not KDB_STATE(SUPPRESS) Then
331  kdb_printf("kdb_getarea: Bad address 0x%lx\n", addr)
332  KDB_STATE_SET(SUPPRESS)
334  ret = KDB_BADADDR
335  Else
336  KDB_STATE_CLEAR(SUPPRESS)
338  Return ret