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Difference between revisions of "Kernel"
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The '''kernel''' of [[iOS]] is the {{wp|XNU|XNU kernel}}. Pre-2.0, it was vulnerable to the [[Ramdisk Hack]] and may still be, but iBoot doesn't allow boot-args to be passed anymore. It is mapped to memory at 0xC0000000. On startup, the [[kernelcache]] is decompressed and run. |
The '''kernel''' of [[iOS]] is the {{wp|XNU|XNU kernel}}. Pre-2.0, it was vulnerable to the [[Ramdisk Hack]] and may still be, but iBoot doesn't allow boot-args to be passed anymore. It is mapped to memory at 0xC0000000. On startup, the [[kernelcache]] is decompressed and run. |
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| − | On production devices, the kernel is always stored as a pre-linked kernelcache stored at '''/System/Library/Caches/com.apple.kernelcaches/kernelcache'''. On development devices the kernel is stored in |
+ | On production devices, the kernel is always stored as a pre-linked kernelcache stored at '''/System/Library/Caches/com.apple.kernelcaches/kernelcache'''. On development devices the kernel is stored in its normal place, at '''/mach_kernel'''. |
== External Links == |
== External Links == |
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Revision as of 18:33, 4 December 2011
The kernel of iOS is the Template:Wp. Pre-2.0, it was vulnerable to the Ramdisk Hack and may still be, but iBoot doesn't allow boot-args to be passed anymore. It is mapped to memory at 0xC0000000. On startup, the kernelcache is decompressed and run.
On production devices, the kernel is always stored as a pre-linked kernelcache stored at /System/Library/Caches/com.apple.kernelcaches/kernelcache. On development devices the kernel is stored in its normal place, at /mach_kernel.
External Links
Article by Stefan Esser about exploiting the kernel
