Hacking Question How boot launchers bypass fusee checks?

Qubarf

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I was just wondering how boot launchers such as hekate and sx os bypass fusee checks?
 

Adran_Marit

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I was just wondering how boot launchers such as hekate and sx os bypass fusee checks?

I assume they all use a similar method... this section of code is from the reinx bootloader.c source file

Code:
void bootloader() {

mbist_workaround();

clock_enable_se();

// This makes fuse registers visible
clock_enable_fuse(0x01);
check_sku();

// Check configuration fuses
check_config_fuses();

// Disables fuse programming until next reboot
FUSE(FUSE_PRIVATEKEYDISABLE) = 0x10;

// Setup memory controllers
mc_enable();

// Pre-Firmware setup
setup();
}

Beyond that I have no clue XD
 

Qubarf

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I assume they all use a similar method... this section of code is from the reinx bootloader.c source file

Code:
void bootloader() {

mbist_workaround();

clock_enable_se();

// This makes fuse registers visible
clock_enable_fuse(0x01);
check_sku();

// Check configuration fuses
check_config_fuses();

// Disables fuse programming until next reboot
FUSE(FUSE_PRIVATEKEYDISABLE) = 0x10;

// Setup memory controllers
mc_enable();

// Pre-Firmware setup
setup();
}

Beyond that I have no clue XD
K, thx
 

Masamune3210

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I'm pretty sure Big N's bootloader is the thing that checks the fuse count and panics if the count isn't correct, as it's also the thing that will burn fuses if the count is too low.
 

Masamune3210

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No, you are thinking about the bootrom, which does some minimal hardware init then starts the bootloader which is stored in one of the firmware partitions
 

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