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Update Booting/linux-bootstrap-2md.md

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hailin cai
2016-02-19 12:28:47 -05:00
parent 3f5d9ed210
commit f9079f8ed1
1 changed files with 3 additions and 2 deletions
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Booting/linux-bootstrap-2md.md
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@@ -353,9 +353,10 @@ ENDPROC(memset)
//heap_end = heap_end_ptr + 512
heap_end = (char *)((size_t)boot_params.hdr.heap_end_ptr + 0x200);
```
which means `heap_end_ptr` or `_end` + `512`(`0x200h`). The last check is whether `heap_end` is greater than `stack_end`. If it is then `stack_end` is assigned to `heap_end` to make them equal.
Now the heap is initialized and we can use it using the `GET_HEAP` method. We will see how it is used, how to use it and how the it is implemented in the next posts.
接下来代码判断`heap_end`是否大于`stack_end`，如果条件成立，将`stack_end`设置成`heap_end`（这么做是因为在大部分系统中全局堆和堆栈是相邻的）。
到这里位置，全局堆就被正确初始化了。在全局堆被初始化之后，我们就可以使用`GET_HEAP`方法。至于这个函数的实现和使用，我们将在后续的章节中看到。
CPU validation
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