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Difference between revisions of "IBoot"
(+ comparison table (with modules/options) to make it easier to determine which component one is looking for) |
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| − | + | '''iBoot''' is the name of Apple’s bootloader. Its components are implemented in both hardware and software, and the term '''iBoot''' may refer to one of the following, which all have '''iBoot-''' in their version strings: |
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| − | *[[Bootrom]] |
+ | * [[Bootrom]] (SecureROM), the hardware implementation |
| + | * Any of the four variants of the software implementation: |
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| − | *[[iBEC]] |
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| + | :* [[iBEC]] (iBoot Epoch Change; called iBootStage2 in iOS 10 and later) |
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| − | *[[iBoot (Bootloader)|iBoot, the stage 2 bootloader]] |
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| + | :* [[iBoot (Bootloader)|iBoot second-stage loader]] (often called simply ''iBoot'') |
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| − | *[[iBSS]] |
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| + | :* [[iBSS]] (iBoot Single Stage; called iBootStage1 in iOS 10 and later) |
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| − | *[[LLB]] |
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| + | :* [[LLB]] (Low Level Bootloader or iBoot first-stage loader) |
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| + | |||
| + | The software implementations are built from the same source, but with different build parameters, as shown in the comparison table below. |
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| + | |||
| + | {| class="wikitable" |
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| + | |- |
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| + | ! rowspan=2 | Product !! colspan=7 | Modules !! rowspan=2 | Text bank !! rowspan=2 | Options |
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| + | |- |
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| + | ! BOOT !! CONSOLE !! DFU !! DISPLAY !! FILESYSTEM !! FIRMWARE !! RECOVERY |
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| + | |- |
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| + | | iBoot || {{yes}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{no}}*** || {{yes}} || sdram || recovery, boot, filesystem, restore_strap |
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| + | |- |
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| + | | iBEC || {{yes}} || {{no}} || {{no}} || {{no}} || {{yes}} || {{no}}*** || {{yes}} || sdram || recovery, boot, filesystem, restore_boot |
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| + | |- |
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| + | | iBSS || {{yes}}* || {{no}}** || {{yes}} || {{no}} || {{no}} || {{no}}*** || {{yes}}* || sram || dfu, restore_strap, recovery*, boot*, restore_boot*, console** |
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| + | |- |
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| + | | LLB || {{no}} || {{no}}** || {{yes}} || {{no}} || {{no}} || {{yes}} || {{no}} || sram || dfu, restore_strap, console** |
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| + | |} |
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| + | <nowiki>*</nowiki> Not included in special development builds<br /> |
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| + | <nowiki>**</nowiki> Included in special development builds<br /> |
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| + | <nowiki>***</nowiki> Included through the BOOT module, which consists of the submodules FIRMWARE, NVRAM, RAMDISK and SYSCFG. |
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{{Disambig}} |
{{Disambig}} |
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Revision as of 03:04, 8 February 2018
iBoot is the name of Apple’s bootloader. Its components are implemented in both hardware and software, and the term iBoot may refer to one of the following, which all have iBoot- in their version strings:
- Bootrom (SecureROM), the hardware implementation
- Any of the four variants of the software implementation:
- iBEC (iBoot Epoch Change; called iBootStage2 in iOS 10 and later)
- iBoot second-stage loader (often called simply iBoot)
- iBSS (iBoot Single Stage; called iBootStage1 in iOS 10 and later)
- LLB (Low Level Bootloader or iBoot first-stage loader)
The software implementations are built from the same source, but with different build parameters, as shown in the comparison table below.
| Product | Modules | Text bank | Options | ||||||
|---|---|---|---|---|---|---|---|---|---|
| BOOT | CONSOLE | DFU | DISPLAY | FILESYSTEM | FIRMWARE | RECOVERY | |||
| iBoot | Yes | No | No | Yes | Yes | No*** | Yes | sdram | recovery, boot, filesystem, restore_strap |
| iBEC | Yes | No | No | No | Yes | No*** | Yes | sdram | recovery, boot, filesystem, restore_boot |
| iBSS | Yes* | No** | Yes | No | No | No*** | Yes* | sram | dfu, restore_strap, recovery*, boot*, restore_boot*, console** |
| LLB | No | No** | Yes | No | No | Yes | No | sram | dfu, restore_strap, console** |
* Not included in special development builds
** Included in special development builds
*** Included through the BOOT module, which consists of the submodules FIRMWARE, NVRAM, RAMDISK and SYSCFG.
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