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...ializes ARM [[TrustZone]] (ARM Secure kernel) through [[SKBL]] and ARM Non-secure kernel through [[NSKBL]]. == ARM Kernel BootLoader ==

...tZone for execution in both a non-secure world and a sandboxed [[TrustZone|Secure World]]. However it is not the first processor to run on boot. The [[Cmep|cmep processor]] is the actual secure boot device rather than the ARM processor. The cmep processor's boot ROM, n

...file and is to hinder downgrade attacks (by externally flashing to eMMC a bootloader from another PS Vita). ...the data directly into the shared DRAM. After clearing the cache, the non-secure kernel has access to the data. Cmep will not decrypt if anything fails in i

=== Secure cryptoprocessor exploit === [[Secure Kernel]] was dumped in 02/2017 through the Octopus exploit. [[First_Loader|

...nfo at <code>0x1F001800</code>, [[Suspend#SKBL Resume code|then enters Non-secure state at <code>0x1F000000</code>]]. ...gned, and belong in a specific range of physical address space (namely Non-Secure DRAM). If the check fails, SKBL enters an infinite loop and the boot proces

Various components in user, kernel, and secure kernel work together to update the system. All the relevant libraries are d = Bootloader =

...fer by [https://github.com/xerpi/vita-baremetal-linux-loader PS Vita Linux bootloader] | Secure Debug Storage Device Input/Output. DevKit mini-USB between CP and PC.

...s higher privileges that the normal [[Kernel]]. On the Vita, it seems that secure world has only a few tasks, which is facilitating communication with the [[ ...ial thing is that Tzs libraries exports are only accessible to Tzs, so non-secure kernel modules cannot import them. For that reason, Tzs [[SceExcpmgr]] regi

...but the same module name can be used in both the non-secure kernel and the secure kernel, for instance [[SceSysmem]]. ...aded by the [[NSKBL]]. Most PS Vita [[Secure Modules]] are loaded by the [[Secure Kernel]].

...enerator code many times, and to implement the generation code in the most secure layer: second_loader (excluding first_loader but that's because first_loade | 0xF8 || 0x4 || second_loader || BootLoader Revision

| Non-secure kernel bootloader mapping. This is unmapped after boot.

Depending on the [[Secure_Modules|Secure Modules]] that is currently loaded, different commands are handled. ...ode>0xFFFFFFFF</code>) is used to stop the current loaded [[Secure_Modules|Secure Module]].