EljakimHerrewijnen/Samsung_S7
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Found area where 02035600 becomes unaccessible. Trying to patch it.

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This commit is contained in:
Jonathan Herrewijnen 2024-09-04 18:16:37 +02:00
parent 66621d36d7
commit 20ad0cdb45
1 changed files with 7 additions and 5 deletions
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12
source/exploit/exploit.py
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@ -743,12 +743,14 @@ class ExynosDevice():
# Modifies/disables setting up MMU (but is set up eventually) -> MMU says 0x0 instead of 0x1, but still little access (and proper USB recovyer boot!?)
# self.cd.memwrite_region(0x020244e8, struct.pack('>I', 0x1f0c00f1)) # Change check to always false
# Write jump backs from BL31 at different levels
# self.cd.memwrite_region(0x02030a28, p64(DEBUGGER_ADDR))
# Overwrite jump back at 0202f810
# self.cd.memwrite_region(0x0202f818, struct.pack('>I', 0xfa610091))
# self.cd.memwrite_region(0x020242a8, struct.pack('>I', 0x568f0094)) # Last succesful jump back to debugger, while still having access to 0x02035600
# self.cd.memwrite_region(0x02032008, struct.pack('>I', 0x1f2003d5)) # Overwrite MAIR to NOP
# self.cd.memwrite_region(0x0203203c, struct.pack('>I', 0xf1570094)) # Return to debugger. (not working, it continues booting..)
# self.cd.memwrite_region(0x0203200c, struct.pack('>I', 0xfd570094)) # -> X1=0x18800, X30=0x20241a0. Device crashes when writing here.
# Jump into BL31 and execute it
self.cd.restore_stack_and_jump(0x02024010)
@ -778,7 +780,7 @@ class ExynosDevice():
# ==== Stage 4 ====
stage4 = open("../S7/g930f_latest/g930f_sboot.bin.4.bin", "rb").read()
# Patching
# stage4_len = len(stage4)
# patch_len = len(b"USB RECOVERY MODE")