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ÓÉbootload½øÈëlinuxºóÓÉhead.s½øÈëÁËstart_kernelÁË.
asmlinkage void __init start_kernel(void)
{
char * command_line;
extern struct kernel_param __start___param[], __stop___param[];
………………..
setup_arch(&command_line);
………….
………..
vfs_caches_init(num_physpages); ………….
…………...
rest_init();
}
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void __init setup_arch(char **cmdline_p)
{
struct tag *tags = (struct tag *)&init_tags;
struct machine_desc *mdesc;
char *from = default_command_line;
setup_processor();
mdesc = setup_machine(machine_arch_type);
machine_name = mdesc->name;
if (mdesc->soft_reboot)
reboot_setup("s");
if (mdesc->boot_params)
tags = phys_to_virt(mdesc->boot_params);
/*
* If we have the old style parameters, convert them to
* a tag list.
*/
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#define EPERM 1 /* Operation not permitted */
#define ENOENT 2 /* No such file or directory */
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char *strcat(const char *s1, const *s2) ......
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/*
* linux/fs/char_dev.c
*
* (C) 1991 Linus Torvalds
*/
#include <errno.h>
#include <sys/types.h> // ¶¨ÒåÁË»ù±¾µÄϵͳÊý¾ÝÀàÐÍ
#include <linux/sched.h>
#include <linux/kernel.h> // º¬ÓÐһЩÄں˳£Óú¯ÊýµÄÔÐζ¨Òå
#include < ......
/*
* ¸ÃÎļþÖеÄÁ½¸öº¯Êýread_pipeºÍwrite_pipeÊÇÉϲ㺯Êý
* readºÍwriteµÄµ×²ãʵÏÖ
*/
/*
* linux/fs/pipe.c
*
* (C) 1991 Linus Torvalds
*/
#include <signal.h>
#include <linux/sched.h>
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