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´ò¿ªGedit.ÀÏ¹æ¾Ø£¬ÏÈÀ´¸öHello.c
#include <stdio.h>
main()
{
 printf("Hello~!Vimo~~\n\n");
}
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gcc hello.c
./a.out
./ hello
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gcc hello.c -o hello
./hello
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)ÏÂÔØ×é¼þºó°´ÕÕReadmeÎļþ°²×°µ¹ÏìӦĿ¼.ÅäÖúÃÏàÓ¦µÄodbcÊý¾ÝÔ´.
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Linux 0.12ÄÚºË

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1. linux/init/main.c
/*
 * read current time from CMOS.
 * ·ÃÎÊCMOSÐèҪͨ¹ý¶Ë¿Ú0x70, 0x71½øÐÐ.
 * ¶ÁÊý¾Ýʱ,ÏÈÓÃOUTÖ¸ÁîÏò0x70·¢ËÍÒª¶ÁÈ¡×Ö½ÚµÄÆ«ÒÆÎ»ÖÃÖµ, È»ºóÓÃINÖ¸Áî´Ó0x71¶ÁÊý¾Ý. ......

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Q: ÔÚÃüÁîÐз½Ê½Ï£¬ÈçºÎ²é¿´CPU¡¢ÄÚ´æµÄʹÓÃÇé¿ö£¬ÍøÂçÁ÷Á¿ºÍ´ÅÅÌI/O£¿
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1. ²é¿´CPUʹÓÃÇé¿öµÄÃüÁî
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int dev_queue_xmit(struct sk_buff *skb)
{
struct net_device *dev = skb->dev;
struct netdev_queue *txq;
struct Qdisc *q;
int rc = -ENOMEM;
/* GSO will handle the following emulations directly. */
if (netif_needs_gso(dev, skb))
goto gso; ......
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