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trezor-firmware/core/embed/fw_ss/asm_helpers.S

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.syntax unified
.text
.global jump_unsecure
.set SCB_VTOR_NS, 0xE002ED08
jump_unsecure:
ldr r1, =SCB_VTOR_NS
str r0, [r1]
ldr r1, [r0, #0]
msr MSP_NS, r1
ldr r1, [r0, #4]
movs r0, #1
bics r1, r0 // bit0 == 0 => transition to Non-secure
bxns r1
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