Vivi Study Notes (commands and linux loading)

Vivi Study Notes (commands and linux loading)-Linux general technology-Linux programming and kernel information, the following is a detailed description. Vivi command:
Every vivi command is a struct variable:
Typedef struct user_command {
Const char * name;
Void (* prop func) (int argc, const char **);
Struct user_command * next_cmd;
Const char * helpstr;
} User_command_t
Example: boot command
User_command_t boot_cmd = {
"Boot ",
Command_boot,
NULL,
"Boot [{cmds}] \ t -- Booting linux kernel"
}
The main function of vivi forms a linked list by calling misc () and init_buildin_cmds (), and uses the global variable head_cmd as the header node. When executing a command, first parse the input command through the parseargs () function, and then call execcmd () to find the corresponding function void (* javasfunc) (int argc, const char **) Call.

Linux loading:
Call exec_string ("boot"), find the command_boot function, run it, find mtd_partition_t * kernel_part, and call boot_kernel () copy the kernel and set the startup parameter struct param_struct * params = (struct param_struct *) param_base. Call call_linux () and use mov pc and r2 to complete the jump.