在所有可加载的内核模块,当make被赋予它会产生一个名为modulename.mod.c除了modulename.ko.
以下代码摘录来自一个.mod.c文件,其中包含一{number, function}对.这个号码有什么意义?这个数字是如何由编译器生成的?
static const struct modversion_info ____versions[]
__used
__attribute__((section("__versions"))) = {
{ 0xa6d8dcb5, "module_layout" },
{ 0x16c2b958, "register_netdevice" },
{ 0x609f1c7e, "synchronize_net" },
{ 0x90a60c63, "kmem_cache_destroy" },
{ 0x402b8281, "__request_module" },
{ 0x844a8af7, "netdev_info" },
{ 0xdfdb0ee8, "kmalloc_caches" },
{ 0x12da5bb2, "__kmalloc" },
{ 0x92d42843, "cfg80211_cqm_rssi_notify" },
{ 0xc86289e8, "perf_tp_event" },
...
...
}
Run Code Online (Sandbox Code Playgroud) 我在warning: assignment from incompatible pointer type [enabled by default]编译以下代码时得到:
int main() {
int (*aptr) [5] = NULL;
int arr[5] = {1,2,3,4,5};
aptr = &arr[0];
printf("aptr = %p\n arr = %p\n", aptr, &arr[0]);
return 0;
}
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我得到了正确的输出:
aptr = 0xbfcc2c64
arr = 0xbfcc2c64
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但是为什么我会收到不兼容指针类型的警告?