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Mask berkas documentation/content/*/books/arch-handbook/boot/_index.po
Berkas penerjemahan Unduh documentation/content/id/books/arch-handbook/boot/_index.po
Perubahan terakhir 10 Maret 2022, 10.39
Penulis terakhir Azrael JD

Statistik string

Persen string String yang dihosting Persen kata Kata yang dihosting Persen karakter Karakter yang dihosting
Total 293 11.007 74.831
Diterjemahkan 1% 1 1% 1 1% 8
Perlu disunting 0% 0 0% 0 0% 0
Hanya baca 0% 0 0% 0 0% 0
Pemeriksaan gagal 0% 0 0% 0 0% 0
String dengan saran 0% 0 0% 0 0% 0
String yang tidak diterjemahkan 99% 292 99% 11.006 99% 74.823
12 bulan terakhir Sebelumnya

Aktivitas dalam 12 bulan terakhir

0 perubahan 0 perubahan 0 perubahan 0 perubahan 0 perubahan 0 perubahan 0 perubahan 0 perubahan 0 perubahan 0 perubahan 0 perubahan 1 perubahan 0 perubahan 0 perubahan 0 perubahan 0 perubahan 0 perubahan 0 perubahan 5 perubahan 0 perubahan 0 perubahan 0 perubahan 0 perubahan 5 perubahan
Des Jan Feb Mar Apr Mei Jun Jul Agu Sep Okt Nov

Angka cepat

11.007
Kata yang dihosting
293
String yang dihosting
1%
Diterjemahkan
0
Kontributor
dan 30 hari sebelumnya

Tren dalam 30 hari terakhir

—
Kata yang dihosting
+100%
—
String yang dihosting
+100%
—
Diterjemahkan
+1%
—
Kontributor
—
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Documentation / books/arch-handbook/boot/_index — Indonesia

3 string baru untuk diterjemahkan muncul dalam terjemahan. satu bulan yang lalu
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Documentation / books/arch-handbook/boot/_index — Indonesia

Although the sysinit framework is described in the extref:{developers-handbook}[Developers' Handbook], I will discuss the internals of it.
 
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Documentation / books/arch-handbook/boot/_index — Indonesia

The last code block of [.filename]#boot1# enables access to memory above 1MB footnote:[This is necessary for legacy reasons.] and concludes with a jump to the starting point of the BTX server:
 
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Documentation / books/arch-handbook/boot/_index — Indonesia

This first block of code is the entry point of the program. It is where the BIOS transfers control. First, it makes sure that the string operations autoincrement its pointer operands (the `cld` instruction) footnote:[When in doubt, we refer the reader to the official Intel manuals, which describe the exact semantics for each instruction.]. Then, as it makes no assumption about the state of the segment registers, it initializes them. Finally, it sets the stack pointer register (`%sp`) to ($LOAD = address `0x7c00`), so we have a working stack.
 
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String baru untuk diterjemahkan

Documentation / books/arch-handbook/boot/_index — Indonesia

3 string baru untuk diterjemahkan muncul dalam terjemahan. setahun yang lalu
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Documentation / books/arch-handbook/boot/_index — Indonesia

Berkas "documentation/content/id/books/arch-handbook/boot/_index.po" telah diubah. setahun yang lalu
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Documentation / books/arch-handbook/boot/_index — Indonesia

Next, the destination register `%di` is copied to `%bp`. `%bp` gets the value `0x800`. The value `8` is copied to `%cl` in preparation for a new string operation (like our previous `movsw`). Now, `stosw` is executed 8 times. This instruction copies a `0` value to the address pointed to by the destination register (`%di`, which is `0x800`), and increments it. This is repeated another 7 times, so `%di` ends up with value `0x810`. Effectively, this clears the address range `0x800`-`0x80f`. This range is used as a (fake) partition table for writing the MBR back to disk. Finally, the sector field for the CHS addressing of this fake partition is given the value 1 and a jump is made to the main function from the relocated code. Note that until this jump to the relocated code, any reference to an absolute address was avoided.
 
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Documentation / books/arch-handbook/boot/_index — Indonesia

As [.filename]#boot0# is loaded by the BIOS to address `0x7C00`, it copies itself to address `0x600` and then transfers control there (recall that it was linked to execute at address `0x600`). The source address, `0x7c00`, is copied to register `%si`. The destination address, `0x600`, to register `%di`. The number of words to copy, `256` (the program's size = 512 bytes), is copied to register `%cx`. Next, the `rep` instruction repeats the instruction that follows, that is, `movsw`, the number of times dictated by the `%cx` register. The `movsw` instruction copies the word pointed to by `%si` to the address pointed to by `%di`. This is repeated another 255 times. On each repetition, both the source and destination registers, `%si` and `%di`, are incremented by one. Thus, upon completion of the 256-word (512-byte) copy, `%di` has the value `0x600`+`512`= `0x800`, and `%si` has the value `0x7c00`+`512`= `0x7e00`; we have thus completed the code _relocation_. Since the last update of this document, the copy instructions have changed in the code, so instead of the movsb and stosb, movsw and stosw have been introduced, which copy 2 bytes(1 word) in one iteration.
 
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