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Update Booting/linux-bootstrap-2md.md

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hailin cai
2016-02-19 12:25:10 -05:00
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@@ -346,9 +346,10 @@ ENDPROC(memset)
换言之`stack_end = esp - STACK_SIZE`.
有了堆栈结束地址之后，堆的结束地址就被计算出来了：
在计算了堆栈结束地址之后，代码计算了堆的结束地址：
```c
//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.