kernel_read【转】 转自:http://blog.csdn.net/echoisland/article/details/7101097 http://lxr.oss.org.cn/source/fs/exec.c 798intkernel_read(structfile*file,loff_toffset,799char*addr,unsignedlongcount)800{801mm_segment_told_fs;802loff_tpos=offset;803intresult;804805old_fs=get_fs();806set_fs...
798 int kernel_read(struct file *file, loff_t offset, 799 char *addr, unsigned long count) 800 { 801 mm_segment_t old_fs; 802 loff_t pos = offset; 803 int result; 804 805 old_fs = get_fs(); 806 set_fs(get_ds()); 807 /* The cast to a user pointer is valid due to th...
798 int kernel_read(struct file *file, loff_t offset, 799 char *addr, unsigned long count) 800 { 801 mm_segment_t old_fs; 802 loff_t pos = offset; 803 int result; 804 805 old_fs = get_fs(); 806 set_fs(get_ds()); 807 /* The cast to a user pointer is valid due to th...
Dec 16 09:48:41 localhost kernel: kernel_read failed: 4 Dec 16 09:48:41 localhost kernel: kernel_read failed: 12 Resolution Engage your respective Crowdstrike support representative for assistance with their kernel modules. If possible,blacklist the third-party kernel modulesif any exist on the...
#include "kernel_read.h" #include "offsets.h" static io_connect_t g_surface_conn = 0; static void * g_surface_kernel_ptr = NULL; static void * g_surface_buffer = NULL; static uint32_t g_surface_id_for_arbitrary_read = 0; /* exclusively for printing static pthread_mutex_t g_m...
enum kernel_read_file_id id) { loff_t i_size, pos; size_t copied; ssize_t copied; void *allocated = NULL; bool whole_file; int ret; @@ -58,7 +58,7 @@ int kernel_read_file(struct file *file, loff_t offset, void **buf, goto out; } /* The file is too big for sane ...
1. 1 Read 准备工作 nfs4_do_open间接调用nfs_fhget,在其中设置 //设置page cache相关函数inode->i_data.a_ops=&nfs_file_aops;//for regular fileinode->i_data.a_ops=&nfs_dir_aops;//for dir generic_file_read_iter()会调用a_ops中的函数,如readpage()等 ...
你找错地方了,代码在 kernkel/fs/proc/proc_misc.c中: proc_misc_init() -> cmdline_read_proc()从 cmdline_read_proc()的代码可以看出,/proc/cmdline的信息就保存在 saved_command_line里了。
VFS 通过open()系统调用,将VFS 对象file, inode, dentry 与具体文件系统联系起来,用户程序通过文件描述符fd来建立内核file 联系,后续read, write 系统调用执行将重定向到具体的文件系统。 1. 系统调用框架 每个系统调用都有一个对应的包装程序,它定义了用户应用程序使用的系统调用API。
需要在Linux kernel--大多是在需要调试的驱动程序--中读写文件数据。在kernel中操作文件没有标准库可用,需要利用kernel的一些函数,这些函数主要有: filp_open() filp_close(), vfs_read() vfs_write(),set_fs(),get_fs()等,这些函数在linux/fs.h和asm/uaccess.h头文件中声明。下面介绍主要步骤 ...